计及杂散参数的柔性直流启动电阻冲击电压分布特性研究  

Study on Impulse Voltage Distribution Characteristics of Flexible HVDC Starting Resistor Considering Stray Parameters

作　　者：周竞宇[1] 张文博 韩坤[2,3] 洪波 胡秋玲[2,3] 黄永瑞 ZHOU Jingyu;ZHANG Wenbo;HAN Kun;HONG Bo;HU Qiuling;Huang Yongrui(CSG EHV Power Transmission Company,Guangzhou 510620,China;Xuji Group Co.,Ltd.,Henan Xuchang 461000,China;Xuji Electric Co.,Ltd.,Henan Xuchang 461000,China)

机构地区：[1]中国南方电网有限责任公司超高压输电公司,广州510620 [2]许继集团有限公司,河南许昌461000 [3]许继电气股份有限公司,河南许昌461000

出　　处：《高压电器》2024年第6期156-165,共10页High Voltage Apparatus

基　　金：河南省重大科技专项(191110210900)。

摘　　要：针对柔性直流输电系统中启动电阻异常放电问题。首先,从启动电阻温升、绝缘水平、电流应力及冲击能量几方面进行校核分析;然后,对现场启动电阻进行拆解,定量分析启动电阻放电原因;最后,利用Ansys搭建电阻器杂散电容求解模型,根据分布电容求解结果,基于PSCAD搭建电阻塔的宽频等效模型,仿真分析启动电阻在冲击电压下的电位分布规律,验证启动电阻异常放电机理并提出优化改进措施。研究结果可为今后柔性直流输电系统启动电阻的选型设计提供参考。Aiming at the problem of abnormal discharge of starting resistor in flexible HVDC system,the check and analysis are performed firstly from such aspects as the starting resistor temperature rise,insulation level,current stress and impact energy;Then,the starting resistor is disassembled at site and the cause of discharge of the starting resistor is quantitatively analyzed、Finally,the Ansys is used to set up the solution model of the stray capacitance of the resistor.The potential distribution of the starting resistor under the impulse voltage is analyzed by simulation in accordance with the solution result of the distribution capacitance and on the basis of broadband equivalent model of the resistance tower which is set up through PSCAD so to verify the abnormal discharge mechanism of the resistor and propose the optimization and improvement measures.The research results can provide a reference for the selection and design of the starting resistor of VSC-HVDC system in the future.

关 键 词：柔直系统 启动电阻 杂散参数 电位分布 放电分析 

分 类 号：TM721.1[电气工程—电力系统及自动化]