摘要
随着电网的发展,网架结构不断加强,交流系统短路容量逐步提高,短路电流超标问题日渐突出,需要合理控制系统的短路电流水平。基于系统拓扑动态调整的短路电流抑制措施,通过在故障期间快速动态改变系统拓扑结构达到限制短路电流的目的。该文以500kV和220kV典型接线为例,研究3/2接线与双母线接线的母线分段开关采用抑制措施后,对系统暂态功角稳定性的影响。根据理论及仿真分析得出,基于系统拓扑动态调整的短路电流抑制措施在有效减少短路电流的同时,对系统的暂态功角稳定性有一定的影响,实施中需要针对实际系统进行具体仿真分析。
With the development of power grids and the strengthening of the grid structures,the short-circuit capacity of the AC system has been gradually improved and the standard exceeding problem of the short-circuit current is increasingly prominent.It is necessary to reasonably control the short-circuit current level of the system.The short-circuit current suppression measures based on the dynamic adjustment of the system topology may limit the short-circuit current by rapidly and dynamically changing the system topology during the fault.Taking 500kV and 220kV typical connections as examples,this paper studies the influence on the transient power angle stability of the system after the bus sectionalizing switch with the 3/2 connection or the double bus connection adopt the suppression measures.According to the theoretical and simulation analysis,the short-circuit current suppression measures based on the dynamic adjustment of the system topology effectively reduces the short-circuit current,and has a certain impact on the transient power angle stability of the system.In the implementation of the measures above,it is necessary to carry out the specific simulation analysis for the actual system.
作者
韩奕
陈维江
韩彬
金玉琪
常乃超
张健
张彦涛
孟祥飞
郄鑫
倪秋龙
HAN Yi;CHEN Weijiang;HAN Bin;JIN Yuqi;CHANG Naichao;ZHANG Jian;ZHANG Yantao;MENG Xiangfei;QIE Xin;NI Qiulong(State Key Laboratory of Power Grid Safety and Energy Conservation(China Electric Power Research Institute),Haidian District,Beijing 100192,China;State Grid Corporation of China,Xicheng District,Beijing 100031,China;State Grid Zhejiang Electric Power Company,Hangzhou 310007,Zhejiang Province,China;School of Electrical and Electronic Engineering,North China Electric Power University,Changping District,Beijing 102206,China)
出处
《电网技术》
EI
CSCD
北大核心
2023年第5期2069-2077,共9页
Power System Technology
基金
国家电网有限公司总部管理科技项目资助(5100-202119014A-0-0-00,SGZJNB00DKJS2100214,短路电流柔性抑制方法及关键技术研究)。
关键词
基于系统拓扑动态调整的短路电流抑制措施
暂态功角稳定性
等面积定则
short-circuit current suppression measures based on dynamic adjustment of system topology
transient power angle stability
equal area criterion
