摘要
主动解列控制是限制扰动波及范围、阻断连锁反应路径和减小故障造成损失的有效措施,对保障电网安全稳定具有重要意义。该文首先研究功角摇摆过程中机组与支路的响应特征,分析多支路互连电网中传输功率转移规律与失稳进程。其次,提出基于简化支路暂态输电能力定量评价指数的关键支路与准关键支路识别方法。再次,提出基于关键支路响应特征的功角失稳综合判据、联合准关键支路的解列割集搜索方法以及主动解列控制策略。最后,面向实际交直流混联电网的严重故障仿真结果,验证所提策略具有失步割集搜索准确、主动解列控制快速等技术优点,可降低直流功率大幅波动以及新能源低压脱网等连锁反应风险。
Fast splitting control,as an important part of stability control of large power grid,is an effective measure to block the path of cascading failure,limit the scope of disturbance,and reduce the loss caused by faults.In this paper,the response characteristics of generators and branches in the process of rotor angle swing were studied,and the law of power transfer and instability process in multi-branch interconnected system were analyzed.Secondly,the definition of critical and quasi-critical branches cluster and the identification method based on wide area branch response were proposed,and the rotor angle instability criterion based on the response characteristics of critical branches and the out-of-step cut-set searching method based on joint quasi-critical branches were proposed.Finally,the simulation results for the actual HVDC and AC hybrid power system show that the proposed strategy has the advantages of accurate location of out-of-step cut sets and fast active splitting control;it can effectively reduce the risk of new energy low-voltage off-grid and etc.
作者
郑超
孙华东
邓嘉卿
ZHENG Chao;SUN Huadong;DENG Jiaqing(China Electric Power Research Institute,Haidian District,Beijing 100192,China)
出处
《中国电机工程学报》
EI
CSCD
北大核心
2022年第11期3885-3895,共11页
Proceedings of the CSEE
基金
中国电力科学研究院有限公司自筹基金项目:基于网络受扰响应信息的大电网广域可控资源协同控制方法研究。
关键词
广域支路响应
功角稳定
支路暂态输电能力
关键支路
失稳判据
主动解列
wide area branch response
rotor angle stability
branch transient transmission capability
critical branch
instability criterion
active splitting
