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- Abstract：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.Keywords：offshore wind power;wind turbine;floating foundation;anti-corrosion technology;operation and maintenance technology285|386|57<HTML><L-PDF> <WORD> <Meta-XML>Updated：2025-06-15
Research on Key Technologies and Industrial Chain Cooperation Paths of Floating Offshore Wind Power Between China and Europe AI Introduction
Abstract：China’s equipment manufacturing system and Europe’s experience in project complement each other. Firstly, this paper focused on the industrial chain and key technologies of floating offshore such as wind turbines, floating foundations, mooring and anchoring system, dynamic submarine cables, survey and design, construction, transportation and installation, operation and maintenance, etc. An evaluation system for the industrial chain with deep vertical analysis and horizontal expansion and comparison was established. Then, combined with the results of China-Europe comparison in different segments, 18 key cooperation areas were proposed. Finally, the study also explored the 4 stages of cooperation paths: exchange & sharing, cooperative construction, scale application and global promotion. It is expected to solve the problems of sole form of demonstration prototype foundation, high cost and immature industry chain,and provide certain ideas and inspiration between China and Europe floating offshore wind power cooperation.Keywords：floating offshore wind power;industry chain;key technology;cooperation area;cooperation path;China and Europe cooperation102|109|3<HTML><L-PDF> <WORD> <Meta-XML>Updated：2025-06-15Study on Aerodynamic Performance of Wind Turbine Airfoil With Combined S-Slot and Trailing Edge Flap Control AI Introduction
Abstract：Reducing the blade aerodynamic loads is extremely important to extend the life of wind turbine blades. Trailing edge flaps are effective means to reduce blade aerodynamic loads, however, its regulation ability weakens greatly at large angles of wind attack. The combined regulation ability on the aerodynamic characteristics of wind turbine blades by S-slot and trailing edge flaps and by adding S-slot at 50% of the chord length of turbine blade was investigated. The shear stress transport (SST) turbulence model was used to study the effect of combined control of S-slot and trailing edge flaps on the aerodynamic characteristics of S809 airfoil at Reynolds number of 106. The synergistic mechanism between the S-slot and trailing edge flaps was further analyzed. The results show that the deflection of trailing edge flaps can significantly change the gas flow rate in the slot, and effectively adjust the pressure difference in the middle of the blade. This combined control strategy can significantly improve the stall phenomenon of airfoil at large angles of wind attack, thereby significantly enhancing the ability of trailing edge flaps to control the lift coefficient.Keywords：wind energy;wind turbine;airfoil;airfoil slot;flap;aerodynamic performance46|84|2<HTML><L-PDF> <WORD> <Meta-XML>Updated：2025-06-15Summary of Desert Photovoltaic Power Transmission Technology AI Introduction
Abstract：To achieve carbon peaking and carbon neutrality goals and improve energy efficiency, new energy plays a major role in China strategic deployment. However, as centralized photovoltaic is located in desert areas, photovoltaic power transmission has become a bottleneck problem. Battery transportation technology provides new possibilities for the existing problems of desert electric energy transmission. Firstly, from the perspective of desert centralized photovoltaic transmission mode, this paper focused on the actual operation of the existing desert photovoltaic transmission and analysed the working principle of battery transportation technology. Then, the differences such as investment cost, transmission capacity, and ability to cope with desert climate were compared between traditional desert photovoltaic transmission and battery transportation technology. Finally, the advantages of battery transportation technology, such as low construction cost and strong ability to deal with desert climate were summarized and the limitations were also discussed.Keywords：peak carbon dioxide emissions;carbon neutrality;desert photovoltaic;battery transportation47|40|7<HTML><L-PDF> <WORD> <Meta-XML>Updated：2025-06-15Risk Assessment of Hydrogen Production Station Equipment Based on Event Tree Cascading Fault Deduction and Evidential Reasoning AI Introduction
Abstract：The hydrogen production station system is complex and vulnerable to external attacks, causing cascading failures and serious safety accidents. The cascading failure deduction method based on event tree was adopted to determine the consequences and occurrence probability of cascading failures of hydrogen production station equipment. On this basis, a cascading fault risk evaluation index system considering safety, economy and environmental protection was established. Considering the randomness and uncertainty of serious consequences and impact, a fuzzy membership function was used to quantify the evaluation index. Finally, a risk assessment model based on evidential reasoning was established and applied to the risk evaluation of hydrogen production station equipment, to realize the risk assessment and ranking of hydrogen production station equipment. The example shows that the method is feasible and effective, which provides a support for the next step of making safety precautions for hydrogen production station equipment.Keywords：coal-fired power station;power engineering;hydrogen production station equipment;event tree71|63|2<HTML><L-PDF> <WORD> <Meta-XML>Updated：2025-06-15
New Energy
Research Status and Prospect of CO2 Accounting Technology in Thermal Power Plants Under the Goal of Dual Carbon AI Introduction
Abstract：The CO2 emissions of China power industry is the main source of CO2 emissions. The CO2 emissions of thermal power plants account for the largest proportion in the power industry. Under the goal of “double carbon”, CO2 accounting technology can realize the intuitive judgment of CO2 emissions in thermal power plants, provide important support for CO2 emission reduction in thermal power plants, promote thermal power plants to participate in carbon trading, and drive regional economic development. Combined with domestic and foreign policies, the implementation progress of the current general CO2 accounting methods was discussed. The problems existing in the CO2 accounting methods of thermal power plants based on carbon accounting and supplemented by carbon monitoring were summarized. The key and difficult points of the application of CO2 accounting technology in thermal power plants were analyzed. Finally, the development and application of CO2 accounting technology in thermal power plants were prospected.Keywords：thermal power plant;dual carbon;CO2 accounting;carbon estimating;carbon monitoring106|34|12<HTML><L-PDF> <WORD> <Meta-XML>Updated：2025-06-15Study on Emission Characteristics, Test and Capture Technology of CO2 in Industrial Flue Gas AI Introduction
Abstract：CO2 is the main greenhouse gas. The reduction of CO2 emissions to cope with climate change has become an international consensus. Industrial flue gas is considered to be an important source of CO2 emissions. The characteristics of industrial flue gas CO2 emission, the main test and treatment technology were studied and analyzed. The CO2 concentrations in power plant, steel and cement flue gas are 9.7%-15%, 2%-28% and 11%-29%, respectively. CO2 testing methods mainly include non-dispersive infrared absorption, gas chromatography, spectroscopy, and chemical absorption, etc. Among these, the non-dispersive infrared absorption method is the most mature in application and is the mainstream technology for fixed source CO2 testing at present. CO2 capture technologies mainly include absorption, adsorption, membrane separation, and cryogenic methods. Among these, the chemical absorption method is widely used for capturing low concentration CO2 (volume concentration ≤30%). The purpose of this study is to provide reference for the subsequent large-scale industrial carbon reduction.Keywords：industrial flue gas;CO2 emission;capture technology;test method92|144|2<HTML><L-PDF> <WORD> <Meta-XML>Updated：2025-06-15
Carbon Neutrality
Exergy Economic Analysis of Ultra-Supercritical Coal-Fired Power Plants With High-Level Layout of Turbine Under Load-Cycling Conditions AI Introduction
Abstract：The rapid penetration of intermittent renewable power puts pressure on the stability and reliability of power grids. To address this tissue, coal-fired power plants play an increasingly important role in providing the peak shaving service. Moreover, the high-level layout of turbine can significantly reduce the amount of high temperature resistant materials and thus improve the economics of ultra-supercritical coal-fired power plants. The exergy and exergy economic models were developed to obtain the performance of ultra-supercritical coal-fired power plants with high-level layout of turbine under load-cycling operation conditions. By analyzing the exergy economic of coal-fired power plants under different loads, and the distribution of irreversibilities was obtained. The results show that the exergy efficiency of the high pressure turbine can be improved by optimizing the parameters. Moreover, the cost of electricity per unit with the high-level layout is 0.332 4 yuan/(kW⋅h). The exergy price of electricity generation decreases with the increase of load.Keywords：ultra-supercritical;coal-fired power generation;thermal power generation;turbine;high-level layout;energy saving and emission reduction;exergy economy47|89|1<HTML><L-PDF> <WORD> <Meta-XML>Updated：2025-06-15Experimental Study on the Influence of Air Side Equalizing Device on the Flow Heat Transfer Characteristics of Cooling Delta Unit AI Introduction
Abstract：For the cooling delta unit, the basic heat transfer element of the cold end of the indirect air-cooling system, the wind speed, air temperature, and wall temperature measuring points were arranged laterally along the heat transfer bundle in the cooling columns on both sides of cooling delta with or without air equalizing apparatus. The wall temperature measuring points were further arranged on the left and right side of water outlet cooling columns. The changes of lateral windward wind speed, wind temperature, wall temperature and outlet water temperature of the cooling columns on both sides along the heat transfer bundles were compared and analyzed. And the influence mechanisms of the air equalizing apparatus on the flow and heat transfer characteristics of the cooling delta unit and the outlet water temperature were studied. The results show that, with the air equalizing apparatus, the distribution of lateral windward wind speed and wall temperature of the two sides cooling columns are more uniform along the heat transfer bundle.Keywords：coal-fired power unit;indirect air-cooling system;cooling delta;air side equalizing device;flow heat transfer;water temperature distribution35|75|2<HTML><L-PDF> <WORD> <Meta-XML>Updated：2025-06-15Comparative Evaluation of Energy-Saving Benefits of Flue Gas Waste Heat Utilization Under the Background of Coal Power Upgrading AI Introduction
Abstract：The energy saving and emission reduction transformation of thermal power enterprises can reduce the coal consumption of thermal power supply, and then effectively reduce the growth of carbon dioxide emissions, which is of great significance to achieve the goal of carbon peak and carbon neutralization. Taking a 630 MW unit as an example, the system units of four waste heat utilization schemes (low-temperature economizer scheme, secondary low-temperature economizer scheme, bypass flue scheme and turbine boiler coupling scheme) were compared, and the key technical parameters and power saving effect were compared and analyzed. Moreover, a reference for the upgrading and technical transformation of energy conservation and emission reduction in China’s power industry was put forward. The results show that the exhaust gas temperature is reduced to 90 ℃, The coal consumption rate of power supply is reduced by 1.88 g/(kW⋅h) in the low-temperature economizer scheme, 2.16 g/(kW⋅h) in the secondary low-temperature economizer scheme, 2.29 g/(kW⋅h) in the bypass flue scheme, and 2.66 g/(kW⋅h) in the turbine boiler coupling scheme.Keywords：coal-fired electricity;conserve energy reduce emissions;waste heat utilization;low temperature economizer37|76|2<HTML><L-PDF> <WORD> <Meta-XML>Updated：2025-06-15- Abstract：In order to maximize the profit of a combined cycle power plant, it is important to accurately predict its full load power output. When a combined cycle power plant operates, the exhaust gas produced by the previous stage is used to drive the next stage heat engine to drive the generator, and its full-load electrical output is affected by ambient temperature, atmospheric pressure, relative humidity and exhaust pressure. Firstly, the kernel principle component analysis (KPCA) was used to perform feature combination dimensionality reduction for power generation related features to complete feature extraction. Then, the extreme gradient boosting algorithm (XGBoost) was used to score feature importance and the optimal feature subset was obtained by forward selection (FS). Finally, a KPCA-XGB-FS model was constructed for the prediction of hourly power output under full load of combined cycle power plants. By experimenting with real data from a combined power station and comparing with existing research methods using the same data, it is found that the method proposed in this paper can effectively predict the power output, and is better than the existing research methods.Keywords：combined cycle power plant;electrical power output;feature extraction;kernel principle component analysis (KPCA);forward selection43|210|1<HTML><L-PDF> <WORD> <Meta-XML>Updated：2025-06-15
An Image-Based Turbine Blade Parameter Inspection Method AI Introduction
Abstract：Accurate inspection of the feature parameters of the blade is a pivotal step to conduct the performance diagnosis and reverse modeling. To improve the inspection efficiency, an image-based parameter inspection method was proposed. First, the skeleton extraction algorithm was used to locate the middle arc of the blade. Then, the middle arc function and the blade thickness distribution function were obtained by the 3-order polynomial curve fitting algorithms. Finally, an optimization algorithm was derived to improve the inspection accuracy. Experimental results show that the proposed image-based feature parameter inspection method has high accuracy, and the relative measurement error is less than 1.5%. It provides a new solution for the rapid and accurate measurement of blade geometric parameters.Keywords：gas turbine;blade parameter inspection;image processing;skeleton extraction38|65|1<HTML><L-PDF> <WORD> <Meta-XML>Updated：2025-06-15Numerical Investigation on Pyrolysis Characteristics of Dunaliella Salina in CO2 Atmosphere AI Introduction
Abstract：In order to study the effect of mass flow rate, gasification temperature and gasification pressure of gasification agent CO2 on the gasification of Dunaliella salina, the Aspen Plus software was used to simulate the pyrolysis process of Dunaliella salina in CO2 atmosphere. The results show that when Dunaliella salina is gasified in CO2 atmosphere, with the increase of CO2 mass flow rate, the H2 volume fraction firstly increases and then reduces. When the mass flow of CO2 is 350 kg/h, the volume fraction of H2 reaches a maximum of 40.06%. When the gasification temperature is increased from 400 to 900 ℃, the volume fraction of H2 and CO increases, and the volume fraction of CH4 decreases. When the gasification temperature is greater than 900 ℃, the volume fraction of H2, CH4 and CO tends to be stable. When the gasification temperature increases from 400 to 1 200 ℃, the higher the pressure, the more CH4 is produced, and the less H2 and CO are produced. When the gasification temperature was 700 ℃, the pressure has the most significant impact on gas production. Therefore, appropriately changing the mass flow of CO2 can increase the production of H2, and appropriately increasing the gasification temperature and reducing the gasification pressure can increase the production of H2 and CO. However, the production of CH4 will decrease.Keywords：biomass;gasification of Dunaliella salina;CO2 gasification agent;pyrolysis characteristic27|22|0<HTML><L-PDF> <WORD> <Meta-XML>Updated：2025-06-15
Power Generation and Environmental Protection
- Abstract：With the development and evolution of the information revolution, promoting the integration of a new generation of digital technology with traditional power generation system, and promoting the digital construction of power generation systems is an important way to support energy transformation and digital grid construction. Based on the digital business needs of power generation system, this paper summarized the business needs of data in various scenarios such as the full life cycle management, intelligent operation and maintenance, and intelligent operation. The architecture of power generation system was expounded from the aspects of network structure and digital technology architecture. The key technologies and applications in the process of digitalization of power generation system were sorted out. Finally, the problems that need to be solved in the process of digitalization of power generation system were discussed.Keywords：digitalization of power generation system;business architecture;collaborative driven;architecture;artificial intelligence;digital twin64|103|9<HTML><L-PDF> <WORD> <Meta-XML>Updated：2025-06-15
Optimal Configuration of Distributed Generation Considering Carbon Trading and Reactive Power Compensation AI Introduction
Abstract：Under the background of “double carbon”, the introduction of carbon trading and reactive power compensation mechanism in the planning of distributed generation is an important means to realize the low-carbon and stability of power system. Therefore, a optimal configuration method of distributed generation considering carbon trading and reactive power compensation was proposed. Firstly, the carbon trading mechanism was introduced to establish the calculation model of carbon trading cost. Then, a two-tier optimal configuration model of distributed generation considering carbon trading and reactive power compensation was established. The upper layer took the annual comprehensive cost as the optimization objective, and the decision variables were the location and capacity of photovoltaic and gas turbine connected to the distribution network. The lower layer took the system network loss, voltage offset and node voltage stability as the optimization objectives. The decision variables were the location and capacity of the reactive power compensation capacitor in the distribution network. Finally, the optimal configuration model was solved by the improved adaptive genetic algorithm. Combined with the example of IEEE33 node structure, the simulation analysis was carried out. The results show that the model can effectively reduce the loss of network and improve the stability of system voltage on the basis of ensuring the economy and environmental protection of the system.Keywords：carbon trading mechanism;reactive power compensation;distributed generation;adaptive genetic algorithm;optimal configuration36|68|10<HTML><L-PDF> <WORD> <Meta-XML>Updated：2025-06-15Overview of Active Distribution Network Planning With High Proportion of New Energy Access AI Introduction
Abstract：The new energy is connected to the distribution network in the form of distributed generation, which brings uncontrollability, randomness and volatility to the system. With the help of modern power electronics, information and communication and automatic control technologies, the active distribution network with flexibility and controllability has become a development trend. The active distribution network planning is one of the major research fields in recent years. Based on the research results in this field at home and abroad, the research contents and methods of active distribution network planning were summarized, analyzed and prospected. The basic structure of the active distribution network was described, and the characteristics of the components of the distribution network were introduced. According to the different control variables, the planning models of active distribution network were classified, the optimization objectives in the model were summarized. The commonly used model solving algorithms and their advantages and disadvantages were analyzed and summarized. Through the discussion of key issues, the development trend of active distribution network in the future was analyzed.Keywords：electric power system;active distribution network planning;new energy;distributed generation137|252|53<HTML><L-PDF> <WORD> <Meta-XML>Updated：2025-06-15Multi-Virtual Power Plant-Oriented Dynamic Aggregation Control Strategy Based on Hierarchical Partition and Multi-Layer Complementation AI Introduction
Abstract：Virtual power plant (VPP) is a new type of operation mode. It can effectively aggregate a large number of demand side resources and formulate effective dynamic aggregate control strategies to achieve power complemen-tation in different time and space of the power grid and improve the flexibility of power grid control and the economy of the system. From the perspective of power grid dispatching, this paper analyzed the characteristics of typical power grid demand response behavior, and proposed the demand response capability indexes and the classification and aggregation method of VPP. Then, a multi-source VPP regulation model was constructed, and the results supported the hierarchical and regional complementary regulation of VPP response resources. Finally, taking a park as a case, the rationality of VPP control strategy and the scientificity of multi-source VPP control were analyzed. The results show that the overall dynamic control strategy can guide the VPP to give full play to the demand response value in a scientific and reasonable way, and promote the stable load of power grid and the safe and stable operation of the system.Keywords：virtual power plant (VPP);dynamic aggregation;power grid dispatching;demand side management156|110|9<HTML><L-PDF> <WORD> <Meta-XML>Updated：2025-06-15- Abstract：The LCL-type grid-connected inverter (GCI) is a critical device for realizing energy transmission between distributed generation and the power grid. The current control of the GCI typically requires multiple sensors to enable active damping and grid-side current control, which increases the system cost. A full-state observation system based on state reconfiguration with quasi resonant-extended state observer was proposed, in which just a signal inverter-side inductor current sensor was required to realize real-time observation of the desired state variables. Meanwhile, the constraint of high observer bandwidth required for conventional extended state observer to track sinusoidal signals was solved by adding a quasi resonant link to the observation channel of each state variable of extended state observer. Moreover, the active disturbance rejection control current controller was designed in the dq frame, which simplified the complicated decoupling process of conventional methods by treating the coupling as part of the total disturbance. The software numerical simulation illustrates that the control strategy show excellent observation results and current tracking performance.Keywords：LCL-type grid-connected inverter;state reconfiguration;quasi resonant-extended state observer;active damping;current decoupling control54|84|10<HTML><L-PDF> <WORD> <Meta-XML>Updated：2025-06-15
Experimental Research of Electrogasdynamic Power Generation With Exposed Electrode Structure Based on Normal Temperature Air AI Introduction
Abstract：In order to explore the influencing factors and laws of the basic process of electrogasdynamic power generation, a simple electrogasdaynamic high-voltage power generation test device with exposed electrode structure was designed based on the basic theory of electrogasdaynamic power generation. Based on this device, high-pressure air was used as the working medium, high-speed airflow was generated through sonic nozzles, and charged particles were generated by corona discharge at the exposed needle electrode. The influences of structural and electrical parameters such as total gas pressure, conversion section length, load resistance, applied voltage, and circuit connection on the voltage and power of electrogasdynamic power generation were studied. By reasonably configuring the parameters of the power generation device, a collection voltage of 4.41 times the corona voltage or a collection power of 3.53 times the corona power was obtained. The research shows that the electric potential is parabolically distributed along the conversion section. The greater the load resistance, the higher the collection voltage. As the applied voltage increases, the larger the collection power, the smaller the ratio of the collection power to the corona power.Keywords：electrogasdynamic power generation;normal temperature air;corona discharge;high voltage;exposed electrode structure65|72|0<HTML><L-PDF> <WORD> <Meta-XML>Updated：2025-06-15
Energy Internet
