according to the characteristics of the AGC in China, and present a method to calculate AGC cost, this method divide AGC cost into power generation cost, equipment investment cost, opportunity cost and adjusting cost. Make independent power producer automatic generation control cost get reasonable recycling, enhance the enthusiasm of the plant to provide ancillary services, avoid causing aspects of the contradiction between supply and demand, and providing assistance to reduce the impact on the quality of power supply. The last is verified by an example.
Smart substation is the tendency of the evolutionary substation in the future and is one key parts of smart grid. The Technical guide for smart substation is published by State Gird Corporation of China for the construction of smart substation. This paper recounts the differences from substation and smart substation, describes the system architecture of smart substation, characteristic of smart equipment and monitors the status of smart equipment. Base on the automation and communication technology, it research on the applications of smart equipment and information technology in smart substation of China. Finally, it prospects the application of smart substation.
In the global carbon emission reduction and energy saving environment, the State Grid Corporation is actively establishing energy service system, building a national grid of energy efficiency services data platform. The data through three ways, such as submitted, the existing data extraction and on-line monitoring, are captured for largest energy users, and then uploaded to the company's headquarter data platform through a variety of communication means of the State Grid Corporation private and public network. Headquarter platform take energy efficiency modeling and data analysis with mass data storage, data mining, OLAP, and other technologies.
According to requirement of the energy conservation of the distribution system, this paper analyses the principle of D-STATCOM reducing Loss and saving energy in distribution system, from the point of reactive power compensation and harmonic filtering in this article from no point of view. Based on instantaneous reactive power theory, a control strategy for the D-STATCOM voltage bridge circuit designed, to use D-STATCOM the purpose to improve the distribution network power factor. The effectiveness and good operating performance of the device and control strategy are certified by simulation with PSCAD/ EMTDC, filtering out the harmonics and compensating reactive power, so as to achieve the purpose of energy conservation Loss Reduction.
In order to promote the development of wind power and accelerate the efficient use of new energy sources, countries have brought energy storage systems into grid-connected wind farms to achieve efficient and stable operation of the wind power plant. This paper recounts the latest development status and trend of wind power at home and abroad, and introduces the principle of power conversion between energy storage system and wind farm. Based on the existing research results, it analyses power system stability related to wind power, low voltage ride-through ability of wind turbine, wind power penetration limit, as well as power quality issues. It also describes the new ideas about how to use energy storage technologies to solve the problems faced by the wind power.
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