全波形积分式电流差动保护  

Full-waveform Integral-type Current Differential Protection

作　　者：于文斌[1] 张国庆[1] 郭志忠[1] 宋平[2] 黄华炜[2] 

机构地区：[1]哈尔滨工业大学电气工程学院,哈尔滨150001 [2]国网上海市电力公司,上海200002

出　　处：《电力系统及其自动化学报》2015年第9期69-73,共5页Proceedings of the CSU-EPSA

基　　金：国家电网公司科技资助项目(SGRI-BB-71-13-006);中央高校基本科研业务费专项基金资助项目(HIT.NSRIF.2013018)

摘　　要：为提高保护的动作速度,基于光学电流互感器准确传变的一次电流全波形信息提出了一种利用1/4工频周期的动作电流波形和制动电流波形的积分值作为保护判据的全波形积分式电流差动保护,以常规相量电流差动保护作为其辅助判据构成了复合差动保护方案。通过对制动比的仿真计算,分析了该保护的动作特性,辅助判据的配合使得该保护方案在提高保护动作速度的同时保证了保护的灵敏性。仿真结果验证了该保护判据的可行性。In order to improve the protection operation speed, the scheme of the full-waveform integral-type current differential protection is proposed based on the accurate full-waveform information of optical current transformer. In this scheme, the integral operation values of the quarter of the power frequency cycle of operating current waveform and restraint current waveform use as the protection criterion. And the multi differential protection scheme is constituted by increasing the traditional phasor current differential protection as the auxiliary criterion. The operation characteristic is analyzed by the simulation of restraint ratio. With the cooperation of the auxiliary criterion, not only the protection operation speed is improved, this multi protection scheme also can ensure the sensitivity of protection. The simulation results prove the feasibility of the protection criterion.

关 键 词：电流差动保护 全波形 积分 光学电流互感器 

分 类 号：TM772[电气工程—电力系统及自动化]