特高压直流输电系统换流阀故障谐波特性研究  

Study on Harmonic Characteristics of Converter Valve Fault in UHVDC Transmission System

作　　者：赵慧 赵洪峰[1] 李梅 王佳 ZHAO Hui;ZHAO Hong-feng;LI Mei;WANG Jia(Institute of Electrical Engineering,Xinjiang University,Urumqi Xinjiang 830046,China;Engineering Training Center,Xinjiang University,Urumqi Xinjiang 830046,China;Ningxia Hui Autonomous Region Ultra-high Voltage Power Engineering co.LTD.,Yinchuan Ningxia 750000,China)

机构地区：[1]新疆大学电气工程学院,新疆乌鲁木齐830046 [2]新疆大学工程训练中心,新疆乌鲁木齐830046 [3]宁夏超高压电力工程有限公司,宁夏银川750000

出　　处：《计算机仿真》2021年第12期79-84,共6页Computer Simulation

基　　金：国家自然科学基金(51762038)。

摘　　要：针对特高压交直流输电系统谐波总畸变率超标引起的系统保护误动作问题,提出利用频域分析法来研究换流阀故障时产生谐波的特性及其对谐波总畸变率的影响。首先对各阀在故障时的通断特性进行理论分析,然后依托PSCAD/EMTDC建立±800kV特高压直流输电系统模型,并对阀不开通和误开通故障进行仿真分析验证。仿真结果表明,换流阀故障时会产生低次非特征谐波,并导致系统谐波总畸变率超标。上述研究为特高压直流输电系统工程配置滤波器保护而有效抑制谐波提供了参考。To solve the problem of system protection malfunction caused by excessive harmonic total distortion rate of UHV AC/DC transmission system, the frequency domain analysis method is proposed to study the characteristics of harmonics generated by converter valve failure and its impact on the total harmonic distortion rate. Firstly,the on-off characteristics of each valve in case of fault were analyzed theoretically, then the ± 800 kV UHV DC transmission system model was established based on PSCAD/EMTDC, and the valve non opening and misopening faults were simulated, analyzed and verified. The simulation results show that the converter valve fault can produce low-order non characteristic harmonics and lead to the total harmonic distortion rate exceeding the standard. This study provides a reference for the harmonic suppression of UHVDC transmission system engineering with filter protection.

关 键 词：特高压直流输电 换流阀故障 非特征谐波 

分 类 号：TM743[电气工程—电力系统及自动化]