高压直流输电控制系统不同锁相环特性对比  

Characteristics Comparison of Different Phase-Locked Loops in HVDC Power Transmission Systems

作　　者：刘静佳 李欢 于华龙 魏伟 张海棠 黄松强 龚英明 王子民 傅闯 LIU Jingjia;LI Huan;YU Hualong;WEI Wei;ZHANG Haitang;HUANG Songqiang;GONG Yingming;WANG Zimin;FU Chuang(State Key Laboratory of HVDC,Electric Power Research Institute,CSG,Guangzhou 510663,China;China Southern Power Grid Co.,Ltd.,Guangzhou 510663,China)

机构地区：[1]直流输电技术国家重点实验室(南方电网科学研究院),广州510663 [2]中国南方电网有限责任公司,广州510663

出　　处：《南方电网技术》2021年第8期12-21,共10页Southern Power System Technology

基　　金：中国南方电网有限责任公司科技项目(ZBKJXM20180104);国家自然科学基金(51777079)。

摘　　要：作为高压直流输电控制系统的基础,锁相环(phase-locked loop,PLL)对换相电压的相位跟踪能力将直接影响高压直流输电控制系统的调节效果。针对新型锁相环频出而无横向对比的现状分析了传统αβ锁相环、基于二阶广义积分器(second-order generalized integrator-quadrature signal generator,SOGI-QSG)的单相锁相环、采用并联延迟信号消去法(multiple delayed signal cancellation,MDSC)滤波的新型三相锁相环的工作原理及优缺点,并将其应用于高压直流输电控制系统中。针对实际电网中的常见故障,在传统高压直流输电系统的RTDS硬件闭环测试平台上进行了模拟测试,横向对比了3种锁相环在各种故障工况下的响应特性,分析了各个锁相环的优缺点,为后续高压直流输电工程选择适宜的锁相环提供了理论及试验依据。As the basis of HVDC power transmission control system,the phase-locked loop(PLL)has a direct influence on the regulation effect of HVDC control system because of its phase-tracking ability to commutation voltage.In view of the current situation that many new PLLs appear recently but lack of horizontal analysis,this paper analyzes the working principle,advantages and disadvantages of traditionalαβPLL,single-phase PLL based on second-order generalized integrator-quadrature signal generator(SOGI-QSG),and new three-phase PLL based on multiple delayed signal cancellation(MDSC).Common faults in actual power grid are simulated test in the RTDS hardware closed-loop test platform of traditional HVDC transmission system,response characteristics of each PLL under various fault conditions are longitudinal compared,the advantages and disadvantages of each PLL are analyzed,which provides theoretical and experimental basis for selecting suitable PLL for future HVDC engineerings.

关 键 词：高压直流输电系统 锁相环 交流系统故障 

分 类 号：TM721.1[电气工程—电力系统及自动化]