基于广域支路响应的功角与电压主导稳定模式判别及紧急控制  被引量:11

Discrimination of Rotor Angle Stability and Voltage Stability Based on Wide-area Branch Response and Emergency Control

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作  者:郑超 孙华东 张爱军 吕思卓 ZHENG Chao;SUN Huadong;ZHANG Aijun;LYU Sizhuo(China Electric Power Research Institute,Haidian District,Beijing 100192,China;Inner Mongolia Electric Power Research Institute of Inner Mongolia Power(Group)Co.,Ltd.,Hohhot 010020,Inner Mongolia Autonomous Region,China)

机构地区:[1]中国电力科学研究院有限公司,北京市海淀区100192 [2]内蒙古电力(集团)有限责任公司内蒙古电力科学研究院,内蒙古自治区呼和浩特市010020

出  处:《中国电机工程学报》2021年第18期6148-6159,共12页Proceedings of the CSEE

基  金:国家重点研发计划项目(2018YFB0905200);国家自然科学基金项目(U2066602);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)。

摘  要:功角稳定与电压稳定是交直流混联电网机电暂态尺度内两种不同稳定模式,快速准确判别主导模式是实施有效控制的前提和基础。该文首先针对两种典型系统,分析不同主导稳定模式下节点电压的幅值与相位时空变化规律,以及不同交流支路段的响应特征差异;其次,利用基于响应信息的定量评价指数——简化支路暂态输电能力sBTTC指数实现不同模式下关键支路的统一识别;在此基础上,结合关键支路垂足电压位置、功率与相位变化率以及相位差大小等特征,提出主导稳定模式判别方法和降低系统失稳风险的紧急控制策略。面向交直流混联大电网的仿真结果,验证判别方法和紧急控制策略的有效性。Rotor angle stability and voltage stability are two different stability modes in electromechanical transient scale of ac and HVDC hybrid power grid.Fast and accurate identification of dominant mode is the premise and foundation of effective stability control.Firstly,based on two typical systems,this paper analyzed the temporal and spatial variation of node voltage amplitude and phase under different dominant stability modes,as well as the difference of response characteristics of different AC branch sections;secondly,in order to identify the critical branches that can characterize the system,a quantitative evaluation index of simplified branch transient transmission capacity(sBTTC)based on response information was defined.According to the position of critical branch’s pedal voltage,the method to distinguish the dominant stability mode and the emergency control strategy to reduce the risk of system instability were proposed.For AC and HVDC hybrid power grid,simulation results verify the effectiveness of the identification method and emergency control strategy.

关 键 词:功角稳定 电压稳定 主导模式 关键支路 判别方法 紧急控制 

分 类 号:TM73[电气工程—电力系统及自动化]

 

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