可控移相器对系统不对称短路电流的影响研究  

Study on the influence of TCPST on asymmetric short circuit current

作　　者：曹路 付俊波[2] 唐陇军 常宝立[2] 黄志光 庄侃沁 陈浩 丁浩寅 CAO Lu;FU Junbo;TANG Longjun;CHANG Baoli;HUANG Zhiguang;ZHUANG Kanqin;CHEN Hao;DING Haoyin(State Grid East China Electric Power Control Center,Shanghai 200120,China;Nanjing Nari-relays Electric Co.,Ltd.,Nanjing 211102,China)

机构地区：[1]国家电网华东电力调控中心,上海200120 [2]南京南瑞继保电气有限公司,江苏南京211102

出　　处：《电力系统保护与控制》2019年第24期1-7,共7页Power System Protection and Control

基　　金：国家自然科学基金项目资助(51307123);国家电网公司华东分部科技项目资助(SGHD0000DKJS1800150)~~

摘　　要：以可控移相器在电力系统中得到广泛应用为研究背景,以研究可控移相器接入系统后对不对称短路电流的影响为目标,提出了基于可控移相器的不对称短路电流实用计算方法。首先根据可控移相器的结构与原理建立其正序、负序以及零序模型。然后基于对称分量法建立含可控移相器系统的各序分量网络方程,进而提出含可控移相器系统的各类型不对称短路电流实用计算方法,并分析影响短路电流的因素。最后基于三机九节点系统,运用上述实用计算方法进行不对称短路电流计算,算例仿真结果表明该方法具备有效性。通过对比分析可知移相器的移相角和短路点位置是影响短路电流的因素,而影响情况需通过具体计算得出。Taking the controllable phase shifter widely used in the power system as the research background, aiming at the influence of the controllable phase shifter on the asymmetric short-circuit current, a practical calculation method for asymmetric short-circuit current based on controllable phase shifter is proposed. First, the positive sequence, negative sequence and zero sequence models are established based on the structure and principle of the controllable phase shifter. Second, based on the symmetrical component method, the network equations of each sequence component with controllable phase shifter system are established, and then the controllable phase shift is proposed. The practical calculation method of various types of asymmetric short-circuit currents of the system is analyzed. Furthermore, the factors affecting the short-circuit current are analyzed. Finally, based on the 3-machine 9-node system, the above-mentioned practical calculation method is used to calculate the asymmetric short-circuit current. The simulation results show that the method is effective. Through comparative analysis, it can be seen that the phase shift angle and the short-circuit point position of the phase shifter are factors affecting the short-circuit current, and the influence situation needs to be calculated through specific calculation.

关 键 词：可控移相器 不对称短路电流 对称分量法 等效模型 

分 类 号：TM713[电气工程—电力系统及自动化] TN623[电子电信—电路与系统]