励磁方式差异对RAM发电机过流保护整定的影响  

Influence of Excitation Mode Difference on RAM Generator Overcurrent Protection Setting

作　　者：李润培 桂林[1] 吴龙[2] 谢小荣[1] 王祥珩[1] LI Runpei;GUI Lin;WU long;XIE Xiaorong;WANG Xiangheng(State Key Lab of Control and Simulation of Power Systems and Generation Equipment(Dept.of Electrical Engineering,Tsinghua University),Beijing 100084,China;NR Electric Co.,Ltd.,Nanjing 211102,China)

机构地区：[1]电力系统及发电设备控制和仿真国家重点实验室(清华大学电机系),北京100084 [2]南京南瑞继保电气有限公司,江苏南京211102

出　　处：《中国电力》2023年第3期86-93,共8页Electric Power

基　　金：国家杰出青年科学基金资助项目(51925701);国家自然科学基金资助项目(52077115)。

摘　　要：中广核下属电站控制棒驱动机构电源系统(rotating asynchronous machine,RAM)包含上电、中船和热蒙3种机型,除上电机型为自并励励磁方式外,其他2种机型均为相复励励磁方式。但各电站在整定不同励磁方式RAM发电机的过流保护时,没有考虑励磁方式差异对过流保护定值及延时整定的影响,存在过流保护拒动以及与其他异常工况保护失配的隐患(误动作)。建立了不同励磁方式RAM发电机的PSACD模型,通过理论分析和仿真说明了励磁方式差异对RAM发电机机端短路电流衰减过程的影响,并通过动模实验验证了仿真分析的正确性。基于理论分析和仿真结果,对不同励磁方式下RAM发电机过流保护的定值及延时进行合理整定,并在中广核下属电站得到实际应用。The rotating asynchronous machine(RAM)system in the power stations of China General Nuclear Power Group(CGN)includes three types of generators—i.e.,Shangdian generator,Zhongchuan generator and Remeng generator.The Shangdian generator is under self-shunt excitation,and the other two types are under phase compound excitation.When setting the overcurrent protection of RAM generators with different excitation modes,the power stations don’t consider the influence of excitation difference on value setting and delay time setting of overcurrent protection,and there may be dangers of overcurrent protection refusal and protection mismatch with other abnormal condition protections(malfunction).In this paper,the PSACD models of RAM generators with different excitation modes are established.The influence of excitation difference on the short circuit current decay process of RAM generator is illustrated by theoretical analysis and simulation,and the correctness of simulation analysis is verified by prototype experiment.Based on the theoretical analysis and simulation results,the setting value and delay time of RAM generator overcurrent protection under different excitation modes are set reasonably,which has been applied in the power stations of CGN.

关 键 词：棒控电源 相复励 机端短路 保护配置及定值整定 

分 类 号：TM31[电气工程—电机]