电力系统保护与控制2025，Vol.53Issue(10)：176-187,12.DOI:10.19783/j.cnki.pspc.241033
基于柔性合环装置SAPST的配电网自适应电流保护研究
Research on adaptive current protection for distribution networks based on flexible loop closing device SAPST
摘要
Abstract
Flexible loop closing using single-core asymmetric phase shifting transformer(SAPST)can improve the success rate of traditional distribution network loop closures.However,the complex structure and intrinsic characteristics of SAPST increase the complexity of configuring protection devices,which may lead to malfunction or failure of protection actions and reduce protection sensitivity.To address these issues,an adaptive current protection method for loop closing networks employing SAPST is proposed.First,an equivalent model of the loop closing network containing SAPST is established,and the mechanism by which SAPST affects traditional current protection is analyzed.Then,based on the SAPST tap position information,a stage-I protection scheme is developed by calculating the short-circuit current using the fault compound sequence component relationships.A stage-II protection scheme is established by adjusting the branch coefficients.Additionally,switching criteria for protection schemes are designed to evaluate the loop closing status in real-time,and a flowchart for the loop closing protection scheme is proposed.Finally,the proposed protection scheme is verified using PSCAD/EMTDC and the RTlab hardware-in-the-loop simulation platforms.Experimental results demonstrate that the proposed scheme offers high selectivity and reliability,providing theoretical support for the engineering application of SAPST.关键词
配电网/单芯不对称/移相变压器/柔性合环/自适应电流保护Key words
distribution network/single-core asymmetric/phase shifting transformer/flexible loop closing/adaptive current protection引用本文复制引用
赵耀,高泽华,李东东,何怡阳,李成志,许江蛟..基于柔性合环装置SAPST的配电网自适应电流保护研究[J].电力系统保护与控制,2025,53(10):176-187,12.基金项目
This work is supported by the National Natural Science Foundation of China(No.52377111). 国家自然科学基金项目资助(52377111) （No.52377111）
西藏自治区科技项目资助(XZ202401ZY0037) （XZ202401ZY0037）
教育部春晖计划合作科研项目资助(HZKY20220084) （HZKY20220084）
