摘要
电力电子装备的大规模应用所引起的振荡,给电力电子化电力系统安全与稳定运行带来了巨大挑战。为解决上述振荡问题,通常需要使用滤波器检测系统振荡信息并设计相应的附加稳定控制器。然而,电力电子装备所引起的振荡呈现出多时间尺度和振荡频率大范围漂移等新特征,传统固定带宽的滤波器已经难以适用。为此,该文提出一种基于交叉耦合锁相环的多频带自适应滤波器,可以快速跟踪并检测电力电子化电力系统所出现的多时间尺度振荡。首先介绍所提出滤波器的结构及工作原理,然后建立该滤波器的小信号模型并验证模型的准确性。通过研究所提出滤波器的特性,该文发现,其他通道交叉耦合的影响相当于在待研究滤波通道中级联了一个陷波器,陷波器中心频率为其他滤波通道锁相环的中心频率。此外,所提出的滤波器可以用于构建电力电子装备的广义稳定器,并解决电力电子化电力系统多时间尺度振荡及振荡频率漂移的问题。
Oscillations caused by large-scale applications of the power electronics devices have brought great challenges to the security and the stable operation of the power electronics dominated power systems. To solve these oscillations, a filter is usually needed to detect the oscillations for designing the extra stable control. However, the oscillations caused by the power electronics devices show the features of multi-timescale and wide range frequency variations. Conventional fixed bandwidth filters are no more practicable. Thus, this paper proposed an adaptive multi-band filter based on cross-coupled PLL structure, which can fast adaptively track and detect the multi-timescale oscillations in the power electronics dominated power systems. First, the structure and the principle of this filter were introduced. Then, the linearized model of the proposed filter was established and verified. The characteristics of the proposed filter indicate that the cross-coupled effects of other filter channels on the studied filter channel can be equivalent into the notch filters. The center frequencies of the notch filters were equal to the PLL center frequencies of other channels. Besides, the proposed filter can be applied to the generalized stabilizer of the power electronics devices to tackle the oscillations with the features of the multi-timescale and the frequency variation.
作者
李胜
袁小明
黄晨辉
LI Sheng;YUAN Xiaoming;HUANG Chenhui(State Key Lab of Advanced Electromagnetic Engineering Technology(School of Electrical and Electronic Engineering,Huazhong University of Science and Technology),Wuhan 430074,Hubei Province,China;Guangzhou Power Supply Bureau Co.,Ltd.,Haizhu Power Supply Bureau,Guangzhou 510000,Guangdong Province,China)
出处
《中国电机工程学报》
EI
CSCD
北大核心
2020年第16期5282-5290,共9页
Proceedings of the CSEE
基金
国家重点研发计划项目(2016YFB0900104)
国家自然科学基金智能电网联合基金重点支持项目(U1766202)
国家电网公司科技项目(SGXJ0000KXJS1700841)。
