摘要
高比例可再生能源和高比例电力电子设备(简称"双高")接入电网引起的宽频振荡问题严重影响电力设备正常工作和电力系统安全运行。面对宽频振荡的多模态及振荡频率时变等新特征,如何实现宽频振荡的在线监测与分析是"双高"电力系统面临的重要问题之一。现有广域监测系统可实时监测和分析电网的低频振荡动态特性,但无法涵盖宽频电磁振荡。为解决该问题,该文提出了"双高"电力系统宽频振荡广域监测与预警系统框架。该系统兼顾现有广域监测系统的功能,同时具备监测和分析"双高"背景下宽频电磁振荡的能力。基于该系统提出了宽频状态估计、宽频振荡溯源及宽频振荡安全风险评估的方法,并通过模拟振荡场景验证了该系统的有效性。最后,分析了该系统在"双高"电力系统中的应用前景。
The wide-band oscillation problem caused by the high penetration of renewable energy sources and the high proportion of power electronic equipment,"double-high"systems,seriously affects normal power equipment operation and power system stability.Such systems require on-line monitoring and analyses of the multi-mode and time-varying wide-band oscillation frequency.Traditional wide-area measurement systems(WAMS)can monitor low-frequency oscillations in power grids in real-time.However,they cannot monitor wide-band electromagnetic oscillations.This paper presents a wide-area measurement and early warning system(WAMWS)for monitoring wide-band oscillations in"double-high"power systems.This system has all the functions in the existing WAMS while monitoring wide-band oscillations in"double-high"power systems.The warning system provides wide-band state estimates,oscillation source identification,and security and stability evaluations of the wide-band oscillations.The effectiveness of this system for monitoring wide-band oscillations is verified in simulations.Finally,this paper considers applications of WAMWS.
作者
马宁宁
谢小荣
唐健
陈垒
MA Ningning;XIE Xiaorong;TANG Jian;CHEN Lei(State Key Lab of Control and Simulation of Power Systemsand Generation Equipment,Department of Electrical Engineering,Tsinghua University,Beijing 100084,China;State Grid East Inner Mongolia Electric Power Supply Co.,Ltd.,Hohhot 010010,China)
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2021年第5期457-464,共8页
Journal of Tsinghua University(Science and Technology)
基金
国家自然科学基金杰出青年项目(51925701)
国家自然科学基金重点项目(51737007)
清华大学-新南威尔士大学自主科研国际合作专项(2020Z02NSW)。
关键词
“双高”电力系统
可再生能源发电
电力电子设备
宽频振荡
广域监测与预警系统
"double-high"power systems
renewable power generation
power electronic equipment
wide-band oscillations
wide-area measurement and early warning systems
