The development of industry has brought a large amount of CO₂ emissions. In the process of achieving the goal of carbon peak and carbon neutralization, carbon dioxide capture, utilization and storage (CCUS) technology is an indispensable key technology. The carbon capture method with high technology maturity at this stage and great development potential in the future is post combustion carbon capture technology, mainly including solvent absorption, adsorption, membrane method and cryogenic distillation. The development and industrial application of the four most commonly used carbon capture methods were briefly introduced, and the industrial applicability of several methods was analyzed, especially the chemical absorption method and physical adsorption method, which are most widely used in large-scale carbon capture projects currently running. Chemical absorption method, adsorption method and membrane carbon capture technology have great development potential in the future, which can quickly promote the achievement of the goal of double carbon and help the near-zero emission of carbon.

The ubiquitous power internet of things(UPIoT) is a complex multi-network system composed of a power system and a combination of intelligent terminal sensors, communication networks, artificial intelligence, and cloud platform technologies. It is with the characteristics of holographic perception, ubiquitous connectivity, open sharing, and fusion innovation. This paper firstly expounded the basic concepts and characteristics of UPIoT, and analyzed its architecture in detail, including the technical architecture, standard architecture, and application architecture. Next, it discussed the key technologies of the ubiquitous power internet of things including intelligent chips, 5G and LPWA, internet of things platform. Afterwards, key difficulties such as business barriers, cyber security, data analytics, and business modes were explored. The actual needs and application prospects of ubiquitous power internet of things were studied.

Offshore wind power is an important development trend in the field of renewable energy in China in the future. Firstly, this paper summarized the current development of domestic offshore wind power industry, analyzed the development trend of domestic offshore wind power industry chain, and then introduced the current cutting-edge technology of offshore wind power industry from the subdivided technical field. It mainly covers unit technology, including blade design and pitch control, transmission chain, motor, converter, main control system, etc; networking transmission technology, including AC, DC and low-frequency transmission technology, as well as compact and lightweight offshore platform design technology; engineering construction technology, mainly including offshore engineering, wind farm construction and submarine cable technology; offshore wind power operation and maintenance technologies, mainly including offshore wind power prediction, wake prediction, optimal dispatching, monitoring and maintenance, etc. The research results can provide the reference for the development of offshore wind power in China.

The deep decarbonization of the energy and power industry will play a vital role in achieving the goal of carbon peak and carbon neutrality in China, and the important breakthrough point lies in the innovation of science and technology. Therefore, the current status of carbon peak and carbon neutrality at home and abroad were analyzed. In addition, the major deployment of China’s electric power industry to achieve the “3060 target” in detail was analyzed. Based on a lot of the latest energy and power policy documents, literatures and reports, the key power generation technologies in the process of carbon peak and carbon neutrality were analyzed. Furthermore, the development trend, emphasis and space layout of power generation-side technology in China during the 14th Five-Year Plan were analyzed and summed up. The research results will provide reference for grasping the important technical deployment and development direction of each power supply and realizing the high quality development of energy power industry.

As a secondary energy, hydrogen energy will play an important role in the future energy system dominated by renewable energy because of its green, flexible and wide-ranging characteristics. The core of large-scale development of hydrogen energy industry is to realize low-cost and efficient raw material source, storage and transportation. Therefore, a review was made on the key technologies of how to truly realize the clean and efficient utilization of hydrogen energy in the aspects of hydrogen production from renewable energy electrolyzed water and hydrogen storage and transportation. The ideas and progress were summarized in the development of hydrogen energy in Europe and Japan as the leading countries for hydrogen energy utilization, and also the cost factors of hydrogen energy were discussed. The development trend of hydrogen energy in China was analyzed, and the development prospect of China's hydrogen energy industry in the future was also put forward, the suggestions were as follows: establishing a sound legal and policy system; paying attention to the development of hydrogen supply and storage and transportation; actively exploring and developing various ways of hydrogen energy utilization.

It will lead to the problem of frequency adjustment when the large-scale new energy integrated in the power grid, and large capacity power energy storage is one of the effective solutions for the problem. By analyzing the types of power energy storage and its application scenarios, this paper points out that there are four large capacity energy storage technologies such as electrochemical energy storage, pumped storage, flywheel energy storage and compressed air energy storage which play a role in the power grid frequency adjustment, introduces the performance feature of the four large capacity power energy storage, and summarizes the properties which participate in grid load adjustment, primary frequency modulation, secondary frequency regulation. The characteristic of peak frequency modulation are compared, and the development tendency of research in the future is pointed out.

Improving the quality of on-grid solar power has attracted worldwide attention in recent years due to the natural intermittent and instability of solar irradiance. As an emerging technology, the photovoltaic/concentrated solar power (PV-CSP) hybrid technology is considered as one of the research focuses currently in solar energy field, due to various advantages compared with the PV-alone and CSP-alone technologies. This paper introduced PV, CSP technologies, and PV-CSP hybrid technology. Through the attention to the construction and operation of some typical commercial PV-CSP hybrid power plants, the application status of commercial PV-CSP hybrid power plants was analyzed, and the technical and economic research of PV-CSP hybrid system in recent years was summarized.

The efficient and comprehensive utilization of solar energy is of great significance for the sustainable development of energy and the realization of the strategic objectives of peak carbon dioxide emissions and carbon neutralization. Firstly, focus on the two main solar energy utilization modes, photovoltaic and photothermal, we systematically introduced the main types, research status and development trend of photovoltaic technologies, as well as the current situation and development trend of thermal power generation, building heating and refrigeration, seawater desalination and industrial heating in photothermal utilization. Then, we discussed the basic principles, main types and research progress of photovoltaic/thermal integration technology, especially the integration technology combined with the phase change heat transfer mode, was systematically introduced. Finally, several flexible "photovoltaic +" solar energy utilization technologies were introduced briefly. Photovoltaic, photothermal, photovoltaic/thermal integration and "photovoltaic +" technologies are still in a period of rapid development, have huge application potential and breed a large number of new technological growth points. These technologies are of great significance to solve the energy and environmental crisis and maintain the sustainable development of human society.

The new generation of artificial intelligence driven by big data has shifted from traditional knowledge representation to deep and autonomous learning. It no longer requires too much human intervention and shows a smarter side. In recent years, deep learning (DL) has become the hotspot of artificial intelligence. This paper focuses on the characteristics, principles and the current application status of DL in the power system. It also analyzes the research trends and problems in the application process of the new generation artificial intelligence, and provides solutions based on distributed machine learning and incremental learning methods. This paper is written for providing references for researchers involved in the field.

Due to the randomness, volatility and anti peak characteristics of wind power, a high proportion of wind power penetrating into the power grid will have a great impact on the stability and security of the power system. Therefore, it is necessary to control the active power of the wind farm to reduce the fluctuation and improve the smoothness of the output power. With the increasing installed capacity, a large number of wind curtailment occur, and the control mode of wind farm is changed from the traditional maximum power point tracking (MPPT) mode to the limit power control mode. The necessity of controlling the active power of the wind farm was analyzed, based on the backgrounds of the control requirements of the wind power connected to power grid and curtailment. Starting from the single machine power control and station level power control, taking the station level power control as the emphasis, the research status of active power control of wind power was summarized. The control characteristics and shortcomings of different control methods were summarized, and research directions were prospected.

Thermal power generation is the largest source of electricity and CO₂ emission in China. CO₂ emission reduction in thermal power generation industry is an important guarantee for the smooth realization of the goal of “carbon peaking and carbon neutralization”. In order to explore the development path of China’s thermal power generation technology under the background of “carbon peaking and carbon neutralization”, combined with the analysis of development process of China’s thermal power generation industry and the prospect of China’s medium and long-term power consumption structure, we predicted that China’s thermal power generation technology will change from focusing on high parameter and high efficiency to peak shaving flexibility. Through the discussion and study of the ultra-high parameter thermal power generation technology, flexible peak shaving technology, IGCC/IGFC technology, it is found that the development of ultra-high parameter thermal power generation technology is limited by high temperature resistant materials. Moreover, the flexible transformation can effectively extend the life cycle of thermal power generation technology. IGCC/IGFC power generation technology was believed to be a clean-coal power generation technology with high efficiency and flexibility, and the application scenario of coal-gas (oil)-electricity integrated energy base was further proposed. Looking forward to 2060, it is suggested to strengthen the study of coal gasification/purification technology, fuel cell power generation technology and IGFC system integrated control technology, to help China achieve carbon neutralization

Under the carbon peak goal and carbon neutral vision, offshore wind power has made great progress in China in recent years. The current development status and future planning of offshore wind power in China were analyzed, summarizing the installed capacity of offshore wind power, new models and adopted technical routes. The paper focused on the basic type, anti-corrosion technology, and operation and maintenance technology of offshore wind power. The floating offshore wind power was the focus of basic type research. The inspection and management systems for operation and maintenance were the primary focus of research in wind power operation and maintenance technology. By analyzing the development status of offshore wind power, the main technical routes and advanced achievements of each technology were identified. Finally, based on the current status and needs of domestic technology development, the future development trends of China's offshore wind power were prospected.

With a large number of distributed energy resources connected to the grid,virtual power plants as a distributed energy management technology have received a lot of attention because of their flexibility,efficiency and sustainability. This paper briefly discussed the background of virtual power plants, analyzed the hot directions and emerging directions in virtual power plants,and introduced the composition and structure of virtual power plants. According to the different goals and functions of virtual power plants,virtual power plants can be divided into mission-driven virtual power plants, economy-driven virtual power plants and hybrid driven virtual power plants. On this basis, the different operation modes and different solution methods of different types of virtual power plants were further discussed. Finally,the future development prospects of virtual power plants were prospected.

Randomness, intermittence and fluctuation are features of new energy, which includes wind energy and solar energy, and power forecasting is an effective solution. The characteristics of wind power output and forecasting model are fully considered to propose piecewise support vector machine (PSVM) and neural network (NN) model; the effort of weather condition on photovoltaic is analyzed to optimize the forecasting model. The case studies from several wind farms and photovoltaic power stations prove that the proposed models have higher precision, which offer support for reliability analysis of power output forecasting.

Compressed air system is one of the most important systems in traditional industries. As a main energy consumer, it has important practical significance to save energy from three major links of production, transportation and application. This paper analyzed the main energy consumption of compressed air from production and transportation to the utilization, and a series of improvement measures on energy saving were put forward and analyzed based on the actual working process of compressed air system. The analysis shows that the deep energy conservation transformation is a complex work which needs to be matched with each link, the energy consumption will be greatly reduced when traditional energy saving measures assisted by new frequency conversion technology, aircompressor station intelligent monitoring system and heat recovery technology. This paper can provide reference for energy saving reconstruction of air compressor system in factories and enterprises.

Offshore wind power is a kind of green energy, which has attracted more and more attention. The anti-corrosion technology of offshore wind power facilities has become a current research hotspot. This paper first expounded the corrosion mechanism of equipments in the marine environment, and then introduced the commonly used anti-corrosion technologies for offshore wind power facilities, including the anti-corrosion coatings, cathodic protection, reserved corrosion allowance method, etc. Then, combined with an example, the anti-corrosion technology of thermal spraying and mineral grease coating in the new anticorrosion method in splash area were introduced emphatically. Finally, it briefly described the anti-corrosion detection and maintenance means of wind power facilities. It also introduced the corrosion protection methods used in Guishan wind power project in Zhuhai, Guangdong, which has been built into grid connected power generation in China, in order to provide some suggestions for improving the anti-corrosion level of offshore wind power.

Aiming at the problems of inefficient manual detection of wind turbine (WT) blades and difficult diagnosis of defects, a method of defects detection for WT blades based on unmanned aerial vehicle (UAV) and image processing is proposed. Through the joint development of Halcon 12 and Visual Studio 2015, the functions of image processing flow, test result output and defects playback are realized, including camera calibration, image processing through fast adaptive weighted median filtering and dynamic threshold segmentation. Through the regional processing to identify defects such as cracks and trachoma, the defects are classified and measured, and the analysis report of WT blades quality can be output to finally realize the automatic detection function of the surface defects of the WT blades. The high accuracy and stability of the algorithm of this method in detecting WT blades surface defects are demonstrated experimentally.

With the massive access to renewable power generation and the advancement of the marketization process, the development prospects of virtual power plants that can give full play to the value of flexible resources have gradually emerged. In the process of virtual power plant participation in the market, the formulation of its market trading strategy needs to be challenged by the market mechanism. On the other hand, the market trading is closely related to the optimal scheduling of resources. The adjustable capacity of the internal resources, uncertainty, load behavior and other characteristics bring challenges to the development of trading strategy. This paper focused on the challenges and problems faced in the market transactions of virtual power plants, and summarized the market strategies adapted to the market mechanism. The key technologies required to deal with the formulation of the strategies, such as uncertainty handling, bid analysis methods, and virtual plant management methods were analyzed and reviewed, in order to provide a reference and a direction for the future research on virtual power plants.

Voltage source converter based high voltage direct current (VSC-HVDC) transmission systems has the advantages of good active and reactive power control capability and more suitable for multi-terminal transmission system. It is considered as a potential transmission mode. Research on control and stability of VSC-HVDC is an important factor affecting the safety and performance of transmission system. Aiming at the study of control strategies of VSC-HVDC systems, the topologies and decoupling and additional control methods of VSC-HVDC were analyzed. Then it extends from the basic two-terminal topologies to the multi-terminal and hybrid topologies, focus on the droop control, fault ride through capability of VSC-MTDC and control of hybrid direct current transmission system. Next, this paper discussed the stability and control schemes of VSC-HVDC for wind power integration, which will provide reference for future research.

Hydrogen production by renewable energy is an inevitable path to achieve the goal of carbon peak and realize the vision of carbon neutralization. As an important part of green hydrogen, hydrogen production by offshore wind power has huge market potential and broad development prospects. Firstly, two different schemes of hydrogen production system by offshore wind power were described. Then, the hydrogen production technologies by water electrolysis and hydrogen storage and transportation technologies suitable for offshore wind scenarios were stated. The typical international hydrogen production projects by offshore wind power and the layout of China’s hydrogen production industry by offshore wind power were untangled. Finally, the development suggestions were put forward from the aspects of top-level design, tackling key technologies and standard system construction, so as to provide reference for the technological innovation and high-quality development of offshore wind power hydrogen production in China.

With the development of interaction between electricity, natural gas and heat networks, collaborative optimization of integrated energy system has become a new research focus. An improved NSGA-Ⅱ algorithm was proposed to solve the optimization problem of integrated energy system, which contained multiple objectives and nonconvex constraints, a global Pareto set maintenance method was proposed to improve the search efficiency of Pareto-optimal solutions. Dimensional reduction and dynamic adjustment were applied to improve the probability of finding feasible solutions under high-dimension equality constraints. An example was analyzed to prove the validity of the proposed method.

In order to cope with the increasing shortage of fossil fuels and a series of threats brought by global climate change, and achieve the goal of “dual carbon”, the proportion of renewable energy such as wind power and photovoltaic power in the grid has been continuously increased. However, the renewable energy power generation is random and uncontrollable, and the access location is scattered, which increases the difficulty of safe and stable operation of the power system. The introduction of virtual power plant (VPP)provides a feasible path for the above problems. The concept and classification of VPP was summarized and expounded. Moreover, the main differences between VPP and microgrid were compared. The existing researches from the perspectives of coordinated control, resource aggregation and optimal scheduling, and participation in the electricity market were analyzed and summarized. Taking the blockchain and digital twin technologies as examples, the applications of digital technologies in VPP were analyzed. Finally, the development prospects of VPP suitable for China’s national conditions and the challenges that may be faced in the future were pointed out.

Virtual power plant has become an important means to promote the construction of new power system and achieve the goal of “double carbon”. The intelligent operation management and control platform of virtual power plant effectively realizes the management and monitoring of flexible and adjustable resources in virtual power plant. The intelligent operation management and control platform of virtual power plant was described from the perspective of system framework and comprehensive functions. Firstly, the energy ecosystem of virtual power plant was analyzed and summarized based on framework of operation management and control, and market participation of virtual power plant. The intelligent operation management and control platform of virtual power plant was analyzed based on characteristics of platform system framework and platform structure framework. Then, the comprehensive functions of intelligent operation management and control platform of virtual power plant were analyzed from three aspects of functional structure blueprint, functional physical structure and functional scenario application.

Accurate estimation of state of charge (SOC), battery state of health (SOH) and prediction of battery remaining useful life (RUL) of lithium-ion battery are important contents of battery management. It is of great significance to prolong battery life and ensure the reliability of battery system. Researchers all over the world have done a lot of research on battery state evaluation and RUL prediction methods, and proposed a variety of methods. This paper first introduced the definition of SOC and SOH and the existing estimation methods and compared them. Then, the definition of RUL was introduced and the main methods were classified and compared. Finally, the challenges of lithium-ion battery state estimation and RUL prediction were summarized, and the future development direction was proposed.

With the increasing demand for energy and the rapid development of new energy, the technology of generating electricity by wind and solar energy has gradually matured, and the penetration rate in the power grid is also increasing. In order to remedy problems of unstable power and low power quality caused by wind and solar power generation, it is necessary to study the combined power generation of wind power, solar energy and energy storage. In this paper, the strategy of energy storage inhibition control is summarized according to the simple suppression method, the suppression method considering certain constraints, the suppression method considering power prediction and artificial intelligence. In the study of energy storage to tame scenery fluctuation filtering algorithm is the most common method, adding certain constraints can make smooth effect better, and energy storage to tame with accurate prediction can make the system smoother. Multi-energy storage technology can give full play to the advantages of energy storage technology. The wind energy storage complementary system with the energy storage device can effectively reduce the adverse effect of the original wind energy complementary system on the power grid. It can smooth the output characteristics of the wind power generation system to a higher degree, increase the acceptance of renewable energy to the power grid, and achieve good economic and social benefits.

The new power system with high proportion of new energy and power electronic equipment is an important means to achieve the goal of “double carbon”, but the new power system will also bring a series of unstable problems. In the new power system, grid-forming control technology (GFM) has the characteristics of voltage support and active inertia, which can replace synchronous machine to realize grid support and maintain power system stability. Therefore, GFM has a broad development and application prospect. Based on this, this paper first briefly introduced the topology of energy storage converter, and selected its type according to the control characteristics of GFM technology. After that, a reasonable summary and analysis of the existing control strategies of GFM was made, the current research difficulties, problems and challenges in the development process and the research prospects were put forward, and the ideas for the construction of grid-forming construction were provided.

In the long-term overheating operation condition, the boiler high temperature superheater is easy to cause the deterioration of materials and the decline of material structure and performance, and causes the pipe explosion accident. The causes of burst tube of final-stage superheater tube in a power plant boiler were analysed through macroscopic examination, Brinell hardness test, tensile strength test and metallographic structure test. The analysis results show that final-stage superheater tube operates at high temperature and pressure for a long time, resulting in the carbide enrichment at grain boundary and weaken the grain boundary strength. Under the action of tensile stress, creep cavities and creep cracks occur at grain boundary, resulting in the decrease of durable strength and tensile strength of pearlite heat-resistant steel, and finally the fracture failure occurs.

As a clean and efficient method of electricity generation, fuel cell is advantageous for high power efficiency, low pollution and noise, and good security, which is one of the most important technologies for distributed power generation. Fuel cell can not only consume the fossil energy like coal or natural gas, but also convert and store renewable energy with its inverse process. In the coal power industry, bulk coal can be utilized cleanly by direct carbon fuel cells, which can solve the problem of low efficiency and severe pollution from bulk coal. Besides, fuel cell can be integrated into natural gas network, forming a micro-combined heat and power system. Compared with the traditional heat and power supply systems, the combined heat and power system has the benefit of energy-step-utilization, with higher efficiency. Furthermore, electrolytic cells can convert the redundant renewable electricity into chemical energy, achieving the energy conversion and storage from the waste hydropower, wind power and solar power, which has great potential in the distributed renewable power system.

With the increasing integration scale of electric vehicles, their impact on the operation and control of the power system cannot be ignored. As a controllable load, the charging and discharging control of electric vehicles can effectively weaken the adverse effects brought by the charging load, and can also play a role of peak-shaving and valley-filling, and promote the consumption of new energy, which will become an important means of power system operation control. The factors to be considered in charging load modeling were firstly given, and the methods for establishing electric vehicle load forecasting models were summarized. Then, the feasible methods of electric vehicle participating in power grid dispatching were reviewed, and the characteristics of different methods were revealed. At the same time, in order to promote the willingness of electric vehicles to participate in dispatching, the architecture and methods of using blockchain to complete electric vehicle power trading were introduced. Finally, the unsolved problems and possible research directions were discussed.

With the increasing scale of new energy power generation, longer and longer transmission distances, and access to large-scale distributed generation and DC loads, it is increasingly difficult for existing AC transmission systems to meet the needs of power system development. Due to the technical advantages of high voltage direct current(HVDC), the challenges faced by AC power systems have brought new opportunities for the development of DC power systems. The development status of DC power technologies at different voltage levels in Europe, America, and China were introduced in this paper. The application scenarios of DC power technologies with different voltage levels were described respectively. In light of the shortcomings of existing AC power transmission technologies, the superiority of DC power technologies were analyzed. Finally, the challenges faced by the development of DC power systems under the current state of technology in key equipment R&D, control and protection, and standard setting were introduced.

In the #1 absorption tower of a power plant wet flue gas desulfurization (WFGD) system, a large number of slurry overflowed from effluent pit, the gypsum moisture content beyond index and mist eliminator was blocked. Through analysis, the main reasons were the high load of absorption tower, the fast flow rate of the tower, the insufficient oxidation of calcium sulfite, the high slurry density in the absorption tower and the less desulfurization absorption slurry atomization particles. Combined with the ultra-low renovation project of the desulfurization system, some equipment expansion was implemented such as increasing the spray layer and backup swirl, switching to the one-way double-headed nozzle and three-roof ridge efficient demisters, installing the stainless-steel tray and synergistic ring on tower wall. Meanwhile, some improvement measures were put forward, such as controlling the pH value and density of the absorption tower, adding desulfurization synergist, increasing the number of oxidation fan operation and improving the demister cleaning frequency.

Vibration analysis method can realize condition monitoring and fault diagnosis of transformer without shutdown and disintegration, which is meaningful to improve the reliability of equipment operation. The vibration of transformer surface is closely related to the compaction state, displacement and deformation of transformer windings and cores, and has been extensively studied by domestic and foreign scholar. The numerical calculation and analysis methods and vibration testing techniques in vibration analysis was described. The application of signal processing methods in transformer vibration analysis was introduced in combination with fast Fourier transform (FFT), wavelet, Hilbert-Huang transform (HHT) and blind source separation technology. The role of acoustic analysis methods in transformer abnormal conditions was expounded. The development of the test device was briefly described, mainly the on-line monitoring system and the basic analysis method of off-line vibrabion frequency response analysis(VFRA). According to the trend and difficulty of vibration analysis method in transformer diagnosis application, the direction of further research was given.

This paper reviewed the current development research of China’s offshore wind power industry in the field of integrated design of wind turbine, tower and foundation. This paper explored the feasibility of integrated design from the aspects of load reduction optimization technology, structural optimization technology and engineering exploration and application, and discussed the key technologies and implementation methods of integrated design that can be adopted under the optimization goal of lightweight offshore wind turbine support structure. The research shows that China’s offshore wind power industry needs to be gradually implemented from three levels: providing the prerequisites for integrated design, using the technologies that can be adopted at the current stage,and exploring the next research directions. In the context of offshore wind power moving towards grid parity, owner-engineers and third-party certification bodies need to play a greater role in promoting the integrated design method.

The electrical energy is converted into mechanical energy in the long term continuous operation of air compressor in thermal power plant. The air is strongly compressed in the process, and the temperature increases greatly, and should be cooled through the cooling system before storage. If this part of the energy is recovered, it can help enterprises to save energy consumption and create good economic, environmental and social effects. In this paper, the scheme of the waste heat utilization of air compressor is designed, and the heat recovery of the compressed air system of six 250kW units in Qing He plant is carried out, the reclaimed heat is used to heat domestic water. The economic analysis is also carried out related to the project. It is shown that the payback period of the project is only about 8 months, and it can save 718 tons of standard coal annually.

The construction of offshore wind power is of great significance to the realization of the “dual carbon” goal and the construction of a new power system with new energy as the main body. Far away from land and complex sea conditions make the control, operation and maintenance (O&M) of offshore wind turbines face many challenges, which are key issues that must be taken seriously and solved in large-scale construction. This paper summarized the current development trend of offshore wind power and related research progress, analyzed the main problems faced by the control and O&M of offshore wind turbines, and sorted out the key technologies of offshore wind power from two aspects of intelligent control and intelligent O&M,so as to provide reference for carrying out frontier theoretical and technical research in this field.

With the increasing demands on the environment, the rational treatment and disposal of garbage is playing an important role in practicing the concept of green development and promoting the construction of ecological civilization. This view of "garbage is a resource placed in the wrong place" is gaining more and more recognition. Municipal solid waste (MSW) incineration power generation technology as a method of solid waste utilization has evolved into a mature resource utilization technology. This paper compares the domestic and international MSW incineration technologies from the top, middle and lower reaches of the waste incineration power generation industry, namely the characteristics of MSW, combustion technology and flue gas control. The results show MSW incineration technology is still an indispensable means to achieve waste reduction and resource reduction. However, it is necessary to upgrade the incineration techno-logy, improve the MSW incineration process, strictly control the emission of pollutants in the incineration flue gas, and establish real-time monitoring points to avoid secondary pollution.

Supercritical carbon dioxide(S-CO₂) Brayton cycle has great development potential in the field of efficient utilization of clean energy represented by fourth-generation nuclear energy and solar energy. A reasonable and reliable control strategy is the key to ensure the safe, stable, efficient and flexible operation of the S-CO₂ Brayton cycle system. This paper summarized the characteristics of S-CO₂ Brayton cycle control, and summarized and compared the S-CO₂ Brayton cycle control strategies under different application scenarios. The results show that the key control strategies of S-CO₂ Brayton cycle include running state control, impeller machine control, heat source control, etc. The variable load control strategies mainly include volume control, turbine bypass control, turbine inlet throttle control, compressor speed control, etc. The analysis results provide a reference for the selection of S-CO₂ Brayton cycle control strategies in related power generation fields.

The multi-energy complementary distributed integrated energy supply system, which is typical of green, low carbon and high efficiency, has become the research focus in the energy sector at home and abroad. The basic concept, main technical characteristics, main components and key technologies of multi-energy complementary distributed integrated energy supply system were described. In addition, based on the energy supply needs and energy endowment of a typical science and technology innovation park in China, the comprehensive energy scheme of 'Integration of Five Aspects' was researched. The main energy supply system of this scheme includes gas distributed energy, distributed photovoltaic, distributed wind power, the sewage-source heat pump and energy storage, and the energy networks include electric power, heating power, refrigerant water, natural gas and reclaimed water. With intelligent technology, this scheme may achieve the 'source-network-load' system optimal operation and meet the different demand of energy consumers. Finally, some suggestions were given for the development and existing problems of China's multi-energy complementary distributed integrated energy supply system.

As an important component of the wind turbine, the tower has a harsh working environment and complex stress, and the load it bears is highly random and variable. Its dynamic characteristics directly affect the safe operation of the wind turbine. Higher requirements are placed on the dynamic characteristics, life loss characteristics and stability of tower. The engineering background of wind turbine tower dynamic characteristics and structural loss research were described, the tower structure and main load characteristics of large-scale wind turbines were introduced, the more common tower structure model establishment methods and working condition simulation methods were sorted out, and the research progress of tower structure modal analysis, dynamic response analysis, buckling stability analysis, and fatigue damage analysis were summarized. Additionally, the domestic and foreign numerical values of simulation technology and the research results were reviewed. A preliminary prospect for the future research direction of tower dynamic characteristics was also made, aiming to provide some references for the further development of this research field.

Concentrated solar power generation technology is one of the most important approach of the solar thermal utilization due to its stability, controllability and high capacity. The photon-thermal conversion efficiency of the solar concentrator is the main factor that influence the power generation capacity and the photon-electric conversion efficiency of the concentrated solar thermal power station. In this paper, the recent key technologies of improving the optical-thermal conversion performance of the solar concentrators were summarized via three aspects, including optical structures, receiver structures and heat transfer fluid. The advanced optimization strategy and the performance improvements of the concentrators, as well as the limitation, were presented. On the basis referred, the perspective of the solar concentrator technologies was analyzed.