高频事故下潮流转移性质和调速器状态转移控制

发布时间：2018-05-30 01:30

本文选题：孤网 + 高频稳定　；参考：《电力系统自动化》2014年11期

【摘要】：为了缓解500kV电网短路电流增长趋势,建设具有抗灾能力的智能电网,需要采取电源—电网—负荷融合的电网规划设计理念,将大容量机组接入220kV地区电网。为了解决由此而产生的"大机小网"高频稳定问题,文中提出了一种高频稳定控制方法。该方法根据高频事故时孤网潮流转移功率信号对调速器实施状态转移控制,能够使机组调速系统快速和准确地跟随孤网突变,将汽轮机组调速系统高频稳定裕度从当前的9%提高到50%以上,水电机组调速系统的性能也得到大幅提高,控制系统具有分散协调性、坚固性和兼容性,能够使灾害破坏下残余的送端电网具备生命自持的能力。最后,对机组潮流转移功率的性质进行了推导和仿真,并论述了调速器状态转移控制的方法、模型和仿真效果。
[Abstract]:In order to alleviate the increasing trend of short-circuit current in 500kV power grid and build a smart grid with anti-disaster capability, it is necessary to adopt the idea of combining power supply, grid and load to connect large capacity units to 220kV area power network. In order to solve the problem of high frequency stability of "large computer network", a control method of high frequency stability is presented in this paper. According to the power signal of the power flow transfer of the isolated network in high frequency accidents, the method implements the state transfer control of the governor, which can make the speed regulation system of the unit follow the mutation of the isolated network quickly and accurately. The high frequency stability margin of speed regulation system of steam turbine unit is raised from 9% to more than 50%, and the performance of speed regulation system of hydropower unit is greatly improved. The control system has the characteristics of dispersion, coordination, robustness and compatibility. Can make the residual power grid under the disaster damage with the ability of self-sustaining life. Finally, the characteristics of power flow transfer power are deduced and simulated, and the method, model and simulation effect of governor state transfer control are discussed.
【作者单位】：贵州电网公司电网规划研究中心;中国电力科学研究院;贵州电力试验研究院;
【分类号】：TM715

【参考文献】