220kV新一代智能變電站設(shè)計(jì)方案研究
[Abstract]:With the increase of global population and environmental pressure, how to save energy, reduce loss and reduce emissions is an important issue facing countries. The construction of smart grid is of great significance to the safe, reliable and efficient operation of power grid, the realization of energy saving and emission reduction, and the development of related industries. The existing intelligent substation has realized the information digitization of the whole station, the communication network platform, the information sharing standardization, the advanced application interaction, and has improved the substation operation maintenance level and the security reliability. However, there is still a gap between the overall level of smart substation and the requirement of building world-class power grid. To this end, the State Grid Company proposed to build a new generation of smart substation objectives. Under this background, this paper studies the new generation intelligent substation design of 220kV, puts forward the new generation intelligent substation electrical design plan, provides the reference and the reference for the next generation intelligent substation design and construction. In this paper, the basic theory of intelligent substation is introduced, and the development background, main category and typical characteristics of smart substation are expounded, which leads to the necessity of constructing intelligent substation. After introducing the function, composition, typical characteristics and design principles of intelligent substation, the achievements and shortcomings of intelligent substation construction at present are analyzed, and the necessity of constructing a new generation intelligent substation is introduced. Then the detailed solutions are given from the following six aspects: hierarchical protection, intelligent primary equipment, intelligent secondary equipment, substation layout optimization and reactive power optimization. Finally, according to the actual situation of the future city and its power grid, a new generation of intelligent substation is designed in detail. The traverse cross-section area is determined by power flow calculation, and the stability check is carried out. The main transformer impedance and current limiting reactor are determined by short circuit current calculation. The bus type is determined according to the maximum current of the load considering overload in normal operation. The main transformer and the main connection form are designed in detail in the primary equipment of the station. The other main primary equipments are determined by the short-circuit current and the working current. According to the requirements of the new generation intelligent substation hierarchical protection and control, the hierarchical protection control system in the station and the protection configuration scheme of each component are designed. In addition, the telecontrol information and equipment, electric energy metering configuration and secondary system security protection configuration are designed in detail. Finally, the investment and power saving of the design scheme are analyzed. This design can meet the demand of the future city area, strengthen the structure of the district power network, improve the reliability of the regional power network, and can effectively alleviate the problem of the shortage of power supply points in the future city area.
【學(xué)位授予單位】:華北電力大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2017
【分類號(hào)】:TM63;TM76
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