基于相空间轨迹识别和多判据融合的变压器保护新策略  

A New Transformer Protection Scheme Based on the Recognition of Phase Space Trajectory and Multi-criteria Fusion

作　　者：戎子睿 林湘宁[1] 金能[1] 邢家维 张培夫 李正天[1] 马书民 RONG Zirui;LIN Xiangning;JIN Neng;XING Jiawei;ZHANG Peifu;LI Zhengtian;MA Shuming(State Key Laboratory of Advanced Electromagnetic Engineering and Technology(Huazhong University of Science and Technology),Wuhan 430074,Hubei Province,China)

机构地区：[1]强电磁工程与新技术国家重点实验室(华中科技大学),湖北省武汉市430074

出　　处：《中国电机工程学报》2020年第6期1924-1937,共14页Proceedings of the CSEE

基　　金：国家自然科学基金项目(51577077,51677108);国家电网公司科技项目。

摘　　要：该文提出一种基于相空间轨迹识别和多判据融合的变压器保护新策略。首先,给出相空间的基本概念及相空间参数的选取方法,然后,分析由故障分量瞬时功率重构形成的相空间轨迹在区内、区外故障及变压器空载合闸等不同工况下的变化规律,据此提出基于相空间轨迹识别的变压器保护新判据,进一步结合电流互感器(current transformer,CT)饱和、变压器合闸于高阻故障及短时转换性故障等特殊场景下电压、电流的变化规律,设计2种保护新判据,并将各判据有机融合,设计一种变压器保护新策略。基于PSCAD/EMTDC的仿真结果验证新策略的有效性和优越性。This paper proposed a new transformer protection scheme based on phase space trajectory recognition and multi-criteria fusion.Firstly,the basic concept of phase space and the method of selecting phase space parameters were given.Then,the phase space trajectory formed by fault component of instantaneous power(FCIP)was analyzed under different conditions such as internal faults,external faults and switching on the unloaded transformer.Given such analyses,a new criterion for transformer protection based on phase space trajectory identification was proposed.Furthermore,two new protection criteria were designed and all criteria were skillfully integrated based on the change rule of voltage and current under exceptional circumstances such as CT saturation,switching on the unloaded transformer with high resistance faults and short-term transferring faults.Finally,a new transformer protection scheme was designed.The simulation results based on PSCAD/EMTDC verify the effectiveness and superiority of the new scheme.

关 键 词：变压器保护 故障分量瞬时功率(FCIP) 励磁涌流 相空间轨迹 CT饱和 

分 类 号：TM77[电气工程—电力系统及自动化]