实际次/超同步振荡事件的多频率耦合效应分析
A Study on Multi-Frequency Coupling Effects in an Actual Sub/Super Synchronous Oscillation Event
易善军 1李原 1马宁嘉 2谢小荣 2苏鹏 1戴幸涛 1马宁宁2
作者信息
- 1. 国网内蒙古东部电力有限公司,内蒙古呼和浩特 010010
- 2. 清华大学电机工程与应用电子技术系,北京 100084
- 折叠
摘要
随着新能源和电力电子设备的占比增加,电力系统的宽频振荡问题日益严峻,且往往伴随着多个频率的振荡分量耦合出现的现象.为了明确新能源电力系统振荡过程中多频率耦合效应的机理和特性,基于典型电力电子变流器并网系统,推导并梳理了变流器在电压扰动作用下输出多阶耦合频率分量的过程,阐明了锁相环控制及坐标变换、dq轴控制不一致等造成变流器并网系统多频率耦合效应的主要原因.最后,结合实际电网的 2 次振荡录波数据分析,验证了多频率耦合机理分析的准确性.
Abstract
With high penetration of renewable energy and electronic equipment in power systems,the issue of wide-band oscillation is becoming increasingly prominent.The coupling phenomenon of multi-frequency components has been observed in practical wide-band oscillations.This paper aims to reveal the mechanism and characteristics of such multi-frequency coupling effect.Firstly,the paper theoretically explains how a converter produces multi-order coupling components under voltage disturbances.Secondly,the reasons that cause the multi-frequency coupling effect in a grid-tied converter is revealed,which includes the control and coordinate transformation of phase-locked loop,inconsistent control of dq axis,and so on.Finally,the field-recorded data of two oscillation events in a certain actual power grid are analyzed to verify the accuracy of mechanism analysis.
关键词
次/超同步振荡/多频率耦合效应/并网变流器/现场录波数据Key words
sub/super synchronous oscillation/multi-frequency coupling effects/grid connection converter/field-recorded data引用本文复制引用
基金项目
国家自然科学基金(U22B20100)
国家自然科学基金(51925701)
国家电网内蒙古东部电力有限公司科技项目(SGMD0000DDJS2250017)
出版年
2024
NETL
NSTL
万方数据