在运阻容式直流分压器的频率响应补偿措施研究  

Research on Frequency Response Compensation Measures of Operated Resistive-capacitive DC Voltage Divider

作　　者：肖勇 翟少磊 罗奕 王恩 钱斌 魏龄 XIAO Yong;ZHAI Shaolei;LUO Yi;WANG En;QIAN Bin;WEI Ling(Electric Power Research Institute,CSG,Guangzhou 510663,China;Electric Power Research Institute of Yunnan Power Grid Co.,Ltd.,Kunming 650217,China)

机构地区：[1]南方电网科学研究院有限责任公司,广州510663 [2]云南电网有限责任公司电力科学研究院,昆明650217

出　　处：《电力电容器与无功补偿》2023年第2期40-46,共7页Power Capacitor & Reactive Power Compensation

摘　　要：阻容式直流分压器的频率响应特性对高压直流输电系统控制保护系统至关重要。阻容式直流分压器在运行过程中,其内部可能会发生绝缘闪络、绝缘介质击穿等故障,引发其等效电容量值发生变化,进而导致其频率响应改变。由于在运阻容式直流分压器的阻容参数很难直接测量,使得补偿阻容参数难以量化,本文基于该研究现状提出了一种在运阻容式直流分压器阻容参数的间接测量方法和频率响应补偿措施,通过二次侧不同标准电容负载下的频率响应试验结果,间接测量出在运阻容式直流分压器的阻容参数,再依据阻容分压器的参数平衡公式对低压臂的电容参数进行调整,实现对阻容分压器频率响应特性的补偿。仿真结果表明本文提出的方法能够实现对在运阻容式直流分压器的频率响应补偿。The frequency response characteristic of resistive-capacitive DC divide is very important to the control and protection system of the HVDC transmission system.During the operation period of the resistive-capacitive DC voltage divider,such faults as insulation flashover and dielectric breakdown may occur inside the divider,which leads to variation of its equivalent capacitance and thus leads to variation of its frequency response.Since it is difficult to measure the resistive-capacitive parameters of the operated DC divider directly and to quantify the compensation resistive-capacitive parameters,a kind of indirect measurement method of operated resistive-capacitive parameters of the operated resistive-capacitive DC voltage divider and frequency response compensation measures are proposed on the research status to measure indirectly the resistive-capacitive parameters of operated resistive-capacitive DC voltage divider through test result of frequency response of the secondary side under standard capacitive load and,in accordance with parameter balance formula of the resistive-capacitive voltage divider,to adjust the capacitive parameters of the low voltage arm so to achieve compensation of frequency response characteristic resistive-capacitive voltage divider.The simulation result shows that the proposed method can achieve frequency response compensation of the operated resistive-capacitive voltage divider.

关 键 词：阻容式直流分压器 电容偏差 频率响应 电容补偿 

分 类 号：TM721.1[电气工程—电力系统及自动化] TM933.213