摘要
研究可控移相器接入系统后对短路电流的影响有重要意义,根据可控移相器的移相原理和拓扑结构,建立其数学模型;基于叠加定理给出短路电流计算方法,分析得到对短路电流的影响最关键的体现在于TCPST接入后阻抗矩阵变化;利用支路追加法通过数学推导得出TCPST接入后阻抗矩阵变化公式,并分析得出对短路电流的主要影响因素包括移相器安装的位置,短路故障发生的位置以及TCPST的移相角大小;最后在IEEE14算例中验证了相关规律和结论。
It is important to study the influence of thyristor controlled phase shift transformer on the short-circuit current after it is connected to the system.First,mathematical model of TCPST are established according to its phase shifting principle and topology.Next,short-circuit current calculation method is given based on the superposition theorem.The most critical manifestation of the impact on the short-circuit current is the change of impedance matrix after TCPST access.Then the mathematics formula of impedance matrix change after TCPST access is derived based on branch addition method.And the analysis shows that the main influencing factors of short-circuit current include the position of the phase shifter installation,the location of short-circuit fault and the phase shift angle of TCPST.Finally,the relevant laws and conclusions are verified in the IEEE14 example.
作者
常宝立
李海峰
付俊波
金涛
刘林
韩连山
刘畅
CHANG Baoli;LI Haifeng;FU Junbo;JIN Tao;LIU Lin;HAN Lianshan;LIU Chang(NR Electric Co.,Ltd.,Nanjing 211102,China;State Grid Jiangsu Electric Power Company,Nanjing 210024,China;School of Electrical Engineering,Wuhan University,Wuhan 430072,China)
出处
《智慧电力》
北大核心
2019年第7期98-103,116,共7页
Smart Power
基金
国家自然科学基金资助项目(51677137)
国网江苏省电力公司科技项目(SGTYHT/16-JS-198)~~
关键词
可控移相器
短路电流
支路追加法
移相角
TCPST
short circuit current
branch additional method
phase-shift angle
