中国电机工程学报2024，Vol.44Issue(2)：535-546,中插8,13.DOI:10.13334/j.0258-8013.pcsee.222242
考虑MAF延时和前馈补偿的高压直流快速锁相环
HVDC Fast Phase-locked Loop Considering MAF Delay and Feedforward Compensation
摘要
Abstract
Synchronous reference frame phase-locked loop(SRF-PLL)is a narrow-bandwidth PLL widely used in high voltage direct current(HVDC)synchronous firing control systems,whose dynamic response is slow in the case of phase jumps caused by AC system faults.In order to increase the bandwidth of PLL,a moving average filter(MAF)is placed in front of PLL.However,there is a response delay in MAF,which restricts the synchronous speed of PLL.In order to alleviate the problem of response delay,this paper proposes an HVDC fast PLL considering MAF delay and feedforward compensation.First,the linear transient characteristic of MAF is used to predict the phase change,and different compensation strategies are proposed for the phase jump caused by fault being connected and removed,respectively.Then,the invariance principle is used to perform feedforward compensation on PLL.Under the action of the composite correction control system composed of negative feedback control and feedforward compensation,PLL can achieve fast response with small PI parameters.Finally,the proposed fast PLL is simulated and verified in the CIGRE HVDC benchmark model and the Three Gorges-Shanghai DC project model.The results show that the fast PLL can effectively alleviate the restriction of the filter response delay,shorten the loss-of-lock time,and further improve the ability of the HVDC inverter side to resist commutation failure.关键词
高压直流/锁相环/滤波器延时/前馈补偿/换相失败Key words
high voltage direct current(HVDC)/phase-locked loop(PLL)/the delay of filter/feedforward compensation/commutation failure分类
信息技术与安全科学引用本文复制引用
汪娟娟,余震霄,吴秋媚,傅闯..考虑MAF延时和前馈补偿的高压直流快速锁相环[J].中国电机工程学报,2024,44(2):535-546,中插8,13.基金项目
国家自然科学基金项目(52277102) （52277102）
南方电网科技项目(ZBKJXM20180104). Project Supported by National Natural Science Fundation of China(52277102) （ZBKJXM20180104）
China Southern Power Grid Science and Technology Project(ZBKJXM20180104). （ZBKJXM20180104）
