电力系统保护与控制2024，Vol.52Issue(14)：121-131,11.DOI:10.19783/j.cnki.pspc.240092
分接开关可控移相变压器保护配置及故障特征分析
Protection configuration and fault characteristics analysis of a tap-changer controllable phase-shifting transformer
摘要
Abstract
The phase-shifting transformer is a piece of economical power flow regulation equipment.It can improve the safety and economy of power grid operation.To realize the engineering application of a tap-changer controllable phase-shifting transformer,first,a main protection configuration scheme of a phase-shifting transformer is proposed from the configuration of current and voltage transformers,and the protection range of each protection element is analyzed.Secondly,a differential adaptive adjustment strategy based on the coordination of control and protection devices is proposed.This can provide that the differential protection calculation of the phase-shifting transformer can be adjusted adaptively according to the real-time tap position of the tap-changer.Then,a current calibration method based on the differential balance of the phase-shifting transformer is presented.This can be used to verify the polarity and parameter of each current transformer.Finally,the waveform characteristics and the adaptability of protection with different fault types and no-load switch-on scenario are analyzed by simulation and real waveform,and the effectiveness of the proposed methods and protection configuration are proved.关键词
移相变压器/继电保护/差动保护/保护配置/故障特征Key words
phase-shifting transformer/relay protection/differential protection/protection configuration/fault characteristics引用本文复制引用
孙仲民,顾乔根,张晓宇,郑超,莫品豪,王波..分接开关可控移相变压器保护配置及故障特征分析[J].电力系统保护与控制,2024,52(14):121-131,11.基金项目
This work is supported by the National Key R&D Program of China(No.2021YFB2401000). 国家重点研发计划项目资助(2021YFB2401000) （No.2021YFB2401000）
