直流换流站无功设备投切过程仿真研究  

Simulation Study on Switching Process of Reactive Power Equipment at DC Converter Station

作　　者：李继红 武兴龙 张笑弟 何英静 但扬清 朱艳伟 徐政[2] LI Jihong;WU Xinglong;ZHANGXiaodi;HE Yingjing;DAN Yangqing;ZHU Yanwei;XU Zheng(State Grid Zhejiang Electric Power Co.,Ltd.,Hangzhou 310007,China;Department of Electrical Engineering,Zhejiang University,Hangzhou 310027,China;Economic and Technological Research Institute of State Grid Zhejiang Electric Power Company,Hangzhou310008,China;State Grid Ningbo Power Supply Co.,Ltd.,Ningbo 315010,China)

机构地区：[1]国网浙江省电力有限公司,杭州310007 [2]浙江大学电气工程学院,杭州310027 [3]国网浙江省电力公司经济技术研究院,杭州310008 [4]国网宁波供电有限公司,浙江宁波315010

出　　处：《电力电容器与无功补偿》2020年第1期38-44,51,共8页Power Capacitor & Reactive Power Compensation

基　　金：国网浙江省电力有限公司科技项目(5211JY170011)。

摘　　要：确定合理的换流站无功平衡和投切策略是直流输电系统安全稳定运行的基础。阐述了交直流系统的无功功率需求和无功补偿设备容量的确定。在PSS/E软件中建立CDC6直流准稳态模型,利用其自定义分析功能,分别从直流系统的启动和停运两个方面来模拟含有感性无功补偿设备的换流站无功投切策略。启动过程遵循“先切感性无功,再投容性无功”的投切原则,停运过程遵循“先切容性无功,再投感性无功”的投切原则。最后通过仿真算例,换流站与交流系统的无功交换量始终处于限定的范围内,验证了该方法的有效性。Determining reasonable reactive power balance and switching strategy of the converter station is the basis for safe and stable operation of the HVDC transmission system.In this paper,the reactive power demand of AC/DC systems and the capacity determination of reactive power compensation equipment are described.The CDC6 DC quasi⁃steady state model is established in the PSS/E software,and its self⁃defined analysis function is used to simulate the reactive power switching strategy of the converter station with both inductive and capacitive reactive power compensation equipment from such two aspects as start⁃up and out⁃age of the DC system.The start⁃up process follows the principle of firstswitching⁃out inductive reactive power equipment,followed by switching⁃in capacitive reactive power equipment,while the stop process follows the principle of firstswitching⁃out capacitive reactive power equipment,followed by switching⁃in inductive reac⁃tive power equipment.Finally,through the simulation example,the reactive power exchange between the con⁃verter station and the AC system is always within the limited range,which verifies the effectiveness of the method.

关 键 词：直流模型 PSS/E 感性无功 容性无功 无功投切策略 

分 类 号：TM721.1[电气工程—电力系统及自动化]