基于测试信号法的HVDC谐波阻抗扫描方法研究  

An harmonic impedance scanning method of HVDC based on a test signal method

作　　者：李清 周强 张东辉 毛炽祖 LI Qing;ZHOU Qiang;ZHANG Donghui;MAO Chizu(EHV Maintenance&Test Center,China Southern Power Grid Company Limited,Guangzhou 510670,China;Sichuan Energy Internet Research Institute,Tsinghua University,Chengdu 610200,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检修试验中心,广东广州510670 [2]清华四川能源互联网研究院,四川成都610200

出　　处：《电力系统保护与控制》2021年第14期168-175,共8页Power System Protection and Control

基　　金：南方电网公司科技项目资助(CGYKJXM20180485);四川省科技计划项目资助(2019YJ0631)。

摘　　要：谐波阻抗扫描是高压直流输电(HVDC)中谐波谐振分析、交流或直流滤波器设计等工作的重要手段。采用电路叠加定理说明了适用于HVDC谐波阻抗扫描的测试信号法。基于测试信号法基本原理及其在HVDC应用研究中的进展,提出测试信号法应用于HVDC谐波阻抗扫描的谐波源幅值选择方法和用于减小谐波源初相位影响的改进扫描方法。最后,以CIGRE First Benchmark模型为例,在PSCAD/EMTDC仿真平台上定量分析了谐波源幅值、谐波源初相位对谐波阻抗扫描的影响,以验证所提出的方法可用于进一步提高HVDC谐波阻抗扫描结果的可靠性,为实际直流输电工程设计提供参考。Harmonic impedance scanning is an important means of harmonic resonance analysis and AC or DC filter design in HVDC.In this paper,the circuit superposition theorem is used to explain the test signal method which is suitable for HVDC harmonic impedance scanning.Based on the basic principle of the test signal method and how it has progressed in HVDC application research,a method of selecting harmonic source amplitude and an improved scanning method for reducing the influence of the initial phase of the harmonic source are proposed.Finally,taking the CIGRE first benchmark model as an example,the influence of harmonic source amplitude and initial phase on harmonic impedance scanning is quantitatively and qualitatively analyzed on a PSCAD/EMTDC simulation platform to verify that the proposed method can be used to further improve the reliability of harmonic impedance scanning results of HVDC,and provide a reference for actual HVDC project design.

关 键 词：高压直流输电 谐波阻抗扫描 测试信号法 谐波源幅值 谐波源初相位 

分 类 号：TM721.1[电气工程—电力系统及自动化]