摘要
柔性交流输电装置(flexible AC transmission system,FACTS)在提升电网安全稳定和运行效率方面发挥着重要的作用。随着柔性交流输电装置在电力系统中的广泛应用,研究系统中多FACTS的协调控制机理对于实现系统的协调阻尼控制具有重要的理论价值和现实意义。针对实现多FACTS协调控制过程中遇到的交互影响问题,提出基于选择模式分析(selective modal analysis,SMA)和多变量频域控制理论的多FACTS交互作用机理分析方法,通过SMA实现多FACTS交互作用的有效特征量提取,进而通过多变量频域控制理论推导出多FACTS间的交互作用关系和发生条件,并在此基础上揭示多FACTS间交互作用机理。研究结果表明:处于多机系统同一电力区域中的多台FACTS阻尼控制器间存在相互制约的关系,当控制器参数满足负交互条件时会发生比较明显的负交互作用,严重时甚至威胁系统的安全运行,当控制器参数满足协调运行条件时才能保证多FACTS间的协调运行与控制。通过仿真验证了文中机理研究的正确性以及在实际电网中应用的可行性。
With the wide applications of flexible AC transmission system （FACTS） technology and devices in power systems, it is very important to investigate the interaction phenomenon and function mechanism among FACTS controllers. This paper studied the interaction mechanism among multiple FACTS damping controllers in power system, and presented a novel multi-FACTS interaction mechanism analysis method on the base of selective modal analysis （SMA） and multivariable frequency domain control theory. First of all, the multi-FACTS interaction characteristics were extracted with the help of SMA. Then the interaction relations among the multi-FACTS and occurred conditions were derived using multivariable frequency domain control theory. Furthermore, the mechanism of interaction was theoretically proved on the base of the above research. The results show that there is certain conditional relationship between Multiple FACTS damping controllers in the same power system. When the parameters satisfy a certain condition, the negative interaction of multiple FACTS occur, which even threaten the safe operation of the system. In order to ensure the coordinated operation of multiple FACTS controllers, the controller parameters should satisfy the coordinated operation conditions. The time domain simulation results validated the conclusion.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2014年第28期4913-4922,共10页
Proceedings of the CSEE
基金
国家863高技术基金重大项目(2011AA05A119)
国家电网公司科技项目~~
关键词
柔性交流输电装置
阻尼控制器
协调控制机理
选择模式分析
多变量频域控制理论
multiple flexible AC transmission system （FACTS）
damping controller
coordinated control mechanism
selective modal analysis （SMA）
multivariable frequency domain control theory
