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List of IssuesDocument Types
- Abstract：The concept of "environmental protection island" was proposed in view of the current situation of environmental protection of thermal power plants. The "environmental protection island" of thermal power plants includes the environmental protection of "gas-water-solid-noise" four pollutant groups happened in the field of thermal power plants. It was thoroughly combed the relationship between the production and control of various pollutants and technical means, thus, an in-depth comparison of the key technologies were made which involved in the transformation and operation. Several corresponding technical routes and technical viewpoint was put forward, and the concept of "environmental protection island" for thermal power plants was formed. It is a good reference for the environmental protection work of thermal power plant.Keywords：environmental protection island;denitration;desulphurization;dust removal;waste water;solid waste;noise72|1396|0<HTML><L-PDF> <Meta-XML>Updated：2025-07-04
- Abstract：According to electric power development the 13th five-year plan and related national policies and legislations, we analyzed coal-fired power units' design technology trend in China in the future and concluded that the core of coal-fired power units' development would be clean coal power generation in the next five years and focusing on low carbon coal power generation research at the same time. During the 13th five-year plan, ultra supercritical coal-fired power generation with higher parameter, ultra-low emission reconstruction in fault coal-fired plants, flexibility and energy saving reconstruction, deep water conservation and biomass co-combustion in large coal-fired boilers have certain development space, and more suggestions are emphasized on technology research areas.Keywords：the 13th five-year plan;coal-fired power units;energy saving;water conversation;carbon emission35|1844|0<HTML><L-PDF> <Meta-XML>Updated：2025-07-04
- Abstract：China's power plant thermal process automation has experienced from scratch, from weak to strong changes. The history of power plant thermal process automation was briefly reviewed, the present situation of power plant thermal automation was analyzed, technologies were discussed such as the control system optimization, fieldbus control system(FCS), distributed control system (DCS), automatic plant start-up and shut down system(APS), digitization, centralization and intelligent. The main problems and the direction of development in the future were put forward.Keywords：automation;distributed control system (DCS);smart power plant34|121|0<HTML><L-PDF> <Meta-XML>Updated：2025-07-04
- Abstract：Aiming at the problem of excessive vibration of the stator end winding of the imported large turbo-generators, an active frequency modulation control method of the stator end winding vibration based on the change of temperature field was proposed. Taking the fixed-hinged straight beam as an example, the influence mechanism of temperature field on natural frequency of structure was studied, and a test plan was designed. The results show that by adjusting the temperature of the stator cooling water and cold hydrogen, the natural frequency of the stator end winding is far away from the electromagnetic excitation frequency and the resonance region is avoided, thereby effectively reducing the vibration of the stator end winding. Finally, the active frequency modulation control logic module based on temperature field thermal stress was developed, which provides a new method for controlling the vibration of the stator end winding of turbo-generator.Keywords：turbo-generators;stator end winding;temperature field;vibration control;active frequency modulation;adaptive control35|2114|0<HTML><L-PDF> <Meta-XML>Updated：2025-07-04
Power Generation and Environmental Protection
- Abstract：The penetration of distributed energy in the distribution network is increasing, which has caused great pressure to the power grid. The combination of energy storage and distributed generation system can reduce unstable electric energy into the network, reduce the impact of photovoltaic power on the power grid and improve the capacity to accept new energy. In view of the necessity of energy storage and the economic problems of projects, a comprehensive life cycle assessment model was established. This method studies the economy of the system from the aspects of project cost, annual income, total profit, static investment recovery period, and evaluates the social benefits of the project. The example shows that the utilization of power generation is high, the annual net income increases obviously, and its economy is less dependent on the electricity price and the degree of electricity subsidies. With the development of photovoltaic and energy storage, systems without energy storage will no longer have economic advantages, and the photovoltaic energy storage system has greater potential for development. Finally, combined with the experience in foreign countries, suggestions are put forward from the benefit feedback, electricity price incentives and financial support, so as to promote the healthy development of distributed photovoltaic industry.Keywords：distributed photovoltaic energy storage system;life-cycle;comprehensive benefit;storage cost;benefit feedback46|1452|0<HTML><L-PDF> <Meta-XML>Updated：2025-07-04
- Abstract：The solar thermal power generation usually takes the water-medium heat absorption as the first generation, the molten salt heat absorption as the second generation, and the Braden circulation system using air, supercritical carbon dioxide or solid particles as the medium is called the third generation of solar heat power system. Through the use of air or ceramic particles as a heat-absorbing medium, the use of dry heat storage media such as refractory bricks and ceramic materials for large-scale heat storage, can improve system efficiency and reduce costs, the system's thermal storage capacity to ensure that the power station at any time according to power grid requirements for scheduling; the system uses standardized module design, through the factory production, power plant design, equipment production, installation, commissioning and operation are simple, the system stored heat can be used for food processing, drying, agricultural applications; according to the United States DOE research, modules with heat storage capability Equipped with a small gas turbine for quick start-up and shutdown, could improve grid voltage and frequency.Keywords：distributed power;solar heat power;brayton circulation;volumetric receiver;modular;thermal storage;grid stabilization21|1556|0<HTML><L-PDF> <Meta-XML>Updated：2025-07-04
Comprehensive Utilization of Energy
- Abstract：Wind is stochastic that trouble the grid power balance and make wind curtailment occur. The wind power and hydropower could cooperate operation to reduce the influence of wind power fluctuation. Through making full use of the regulating ability of hydropower and wind energy, the coordinated operation of wind power and hydropower can be realized by controlling hydropower units, so that the wind and hydropower coordinating operation system will output according to the plan, stabilize the power system. To achieve the coordinated operation of wind power and hydropower and improve the stationarity of the coordinate output, the Grey Wolf algorithm was used to optimize the PID control of hydraulic turbine, to facilitate hydropower steadily track the change of wind power and make the output of wind power and hydropower output according to plan. The simulation results verified the effectiveness of the method.Keywords：wind power;hydropower;wind and hydropower coordinating operation;grey wolf optimizer algorithm17|1456|0<HTML><L-PDF> <Meta-XML>Updated：2025-07-04
Wind Power Control Strategy Under Wind Abandon Condition Considering Difference of Electricity Price
Abstract：A control strategy for maximizing wind farm revenue under wind abandon conditions was proposed based on abandoned wind and different electricity price. A set of coordinated control system was set up between wind farm automatic generation control (AGC) system and energy management platform (EMS) of different wind turbine group. The coordination control system is based on different electricity price considering the maximum generating capacity of the wind turbine and distributes rationally active power. The wind turbine with high electricity price will be given priority for generating electricity on the premise of ensuring the reliability and safety and maximizes revenue. Improved benefit is finally obtained through the calculation of the theoretical power of different clusters, .Keywords：wind turbine;difference of electricity price;coordinated control;revenue46|1218|0<HTML><L-PDF> <Meta-XML>Updated：2025-07-04- Abstract：In response to the Global Energy Internet strategy, protecting the security of coordinated hydro and wind power generation, the demands of wind power and hydropower coordinated operation (WHCO) for information and communication technology was analysed. Combined with the development of power grid information technology, the WHCO-information and communication protection network (ICPN) was proposed. The overall functional architecture of information and communication protection network is built. The key technologies were presented. Finally, a specific WHCO-ICPN system was built in the coordinated hydro and wind power generation scheduling system. The information sharing, information communication delay and security defence function of the system were introduced. The system provides a solid technical support for the Global Energy Internet strategy needs and has great engineering value in practice.Keywords：global energy internet;wind power and hydropower coordinated operation (WHCO);dispatching system;information and communication protection network (ICPN)45|2163|0<HTML><L-PDF> <Meta-XML>Updated：2025-07-04
- Abstract：Aimed at the phenomenon of wind turbine blade icing, which is easy to occur in the cold areas, a method of icing detection of wind turbine blades using SCADA data was proposed. When the blades are icing, the power loss of generator will be increased, thus the method picks two variables, wind speed and power. Principal component analysis (PCA) was used to construct the projection feature on non-principal component direction which is sensitive to icing and active power of network. By choosing the optimal threshold, the logistic regression classifier is suitable for unbalanced classification. The effectiveness of this method was verified by the data of China Industrial Big Data Innovation Competition.Keywords：ice detection on wind turbine blade;SCADA data;non-principal component projection feature;optimal threshold selection;unbalanced classification60|242|0<HTML><L-PDF> <Meta-XML>Updated：2025-07-04
- Abstract：In order to identify the faults of rolling bearing of wind turbines, the variational modal decomposition (VMD) was combined with two methods, including calculation order tracking (COT) and reversed sequence squared envelope spectrum (RE-SES), to carry out the envelope order analysis. The non-stationary signals in time domain were converted into stationary signals in angle domain by equal angle sampling. And the bearing fault characteristic information was obtained by envelope method. The results show that the modulation order of amplitude modulation signal can be extracted more effectively by VMD combined with RE-SES envelope order method. The VMD filter could make the fault feature order more prominent, and it is easy to identify the fault, and it provide reference for the fault diagnosis of rolling bearing of wind turbine under variable speed condition.Keywords：wind turbine generator;non-stationary signal;computed order tracking (COT);the envelope order;variational mode decomposition (VMD);reversed sequence squared envelope spectrum (RE-SES);bearing fault diagnosis27|306|0<HTML><L-PDF> <Meta-XML>Updated：2025-07-04
NEW and Renewable Energy
- Abstract：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.Keywords：compressed air;energy consumption;energy-saving and cost-reducing82|771|0<HTML><L-PDF> <Meta-XML>Updated：2025-07-04
- Abstract：The increasing penetration rate of wind power and photovoltaic challenges the stable operation of the grid. Energy storage technology can effectively control the fluctuation of renewable energy generation, enhance the controllability of renewable energy power generation and improve the accessing capability of renewable energy sources connected to the grid. Therefore, the related research and technology of energy storage systems in the grid are getting more and more attention. In this paper, taking energy storage systems to access the grid as a starting point, the application value of energy storage systems in four scenarios such as frequency regulation, peak regulation, backup capacity, delay transmission and distribution expansion were studied and summarized. The development prospects of the commercial modes related to energy storage systems and the key scientific issues to be studied in the future were discussed.Keywords：energy storage system;frequency regulation;peak regulation;backup capacity;application value;commercial modes76|810|0<HTML><L-PDF> <Meta-XML>Updated：2025-07-04
Energy Storage
- Abstract：As the development of ultra-high voltage (UHV) AC and DC transmission system in China, the quantity of unbalanced power caused by a single element fault will continue to increase. The large-scale renewable energy integration will keep decreasing the capacity ratio of conventional thermal units. Of both ends on the floor in frequency response control, the "offense" will be strengthening while the "defense" be lessening, and the frequency stability have become outstanding. On the other hand, the ever-richer frequency response control measures on "source-grid-load" side should be coordinated better, to make full use of their control performance so as to improve frequency stability level. Through analyzing the structure and shape of future grid from the perspective of frequency response control, it is clear that frequency response control resources need more refined management and control, and the relevant theory should be progressing with time. It is pointed out that the research of dispatch of frequency response from the dynamic perspectives and centralized and unified coordination and control of frequency response control measures should be developed. This will provide the references for planning, scheduling and dispatching of frequency response control measures and the participants of kinds of subject in frequency control. So, the frequency stability defense capacity will be reinforced with enhanced system frequency response control ability.Keywords：frequency response;primary frequency regulation;control of safety and stabilization;frequency stability;ancillary services;frequency control;wide area control;high penetration of renewable energy22|459|0<HTML><L-PDF> <Meta-XML>Updated：2025-07-04
- Abstract：When power network losses are assumed to be constant, an analytical solution was proposed to solve the economic dispatch problem given the unit consumption characteristics are convex. However, as the losses are actually varying with the outputs of the power generating units, the previous analytical method cannot be applied directly. Fortunately, based on the convexity of losses related to the unit's power output as well as power flow equations, this paper proposes a fast-analytical method for economic dispatch with consideration of network losses. The proposed method converts the problem into several economic dispatch problems with constant losses and the optimal solution can be found in monotone finite algebraic calculus.Keywords：power systems;economic dispatch;power network losses;convexity50|424|0<HTML><L-PDF> <Meta-XML>Updated：2025-07-04
Intelligent Power System
