干式空心电抗器股间短路故障仿真研究  

Study on Simulation of Strand-to-strand Short Circuit Fault for Dry-type Air Core Reactor

作　　者：梁基重 李国栋 李帅 杜一鸣 祝令瑜[2] LIANG Jizhong;LI Guodong;LI Shuai;DU Yiming;ZHU Lingyu(Electric Power Research Institute of State Grid Shanxi Electric Power Company,Taiyuan 030000,China;State Key Laboratory of Electrical Insulation and Power Equipment,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]国网山西省电力公司电力科学研究院,太原030000 [2]西安交通大学电力设备电气绝缘国家重点实验室,西安710049

出　　处：《电力电容器与无功补偿》2022年第6期22-29,共8页Power Capacitor & Reactive Power Compensation

基　　金：国网山西省电力公司科技项目(SGSXDK00SPJS2000226)。

摘　　要：随着电力工业的发展,干式空心电抗器得到了越来越广泛的应用,因其故障导致的安全事故也越来越多。使用多股并绕的干式空心电抗器理论上可以有效避免短路故障产生,但在实际运行中仍有故障出现,目前缺少针对电抗器股间短路故障的研究。为了研究股间短路故障对电抗器的影响,建立了场-路耦合有限元仿真模型,对正常运行以及股间短路故障下电抗器的空间磁场和电流分布特性进行了仿真。结果表明:电抗器发生同匝股间短路故障时,其工作状态几乎未发生变化;异匝股间短路故障会显著影响短路匝附近的空间磁场,且短路点越靠近端部,故障越严重;异匝股间短路故障会显著改变电抗器的电流,尤其是电流实部。研究工作全面地揭示了电抗器股间短路故障下运行特性变化,对电抗器故障发生与诊断提供了参考。With the development of power industry,dry-type air-core reactor has been more and more widely used.However,more and more safety accidents are caused by its fault.Dry-type air-core reactor with multi strand parallel winding can in theory effectively avoid occurrence of short circuit fault,but there are still faults in the actual operation and little research has been done on the strand-to-strand short circuit fault of the reactor at present.In order to study the influence of strand-to-strand short circuit fault on the reactor,the field-circuit coupling finite element simulation model is set up to simulate the spatial magnetic field and current distribution characteristics of reactor under normal operation and strand-to-strand short circuit fault.The results show that in case of short circuit fault of the same turn strand to strand of the reactor,its operation condition remains almost unchanged.While,the different turn strand-to-strand short circuit fault can significantly affect the space magnetic field near the short circuit turn,and the closer the short circuit point is to the end,the more serious the fault is.The different turn strand-to-strand short circuit fault can significantly change the current of the reactor,with the real part current in particular.The study fully reveals the operation variation characteristics of reactor under strand to strand short circuit fault,and provides a reference for the occurrence and diagnosis of reactor fault.

关 键 词：干式空心电抗器 股间短路 有限元仿真 

分 类 号：TM47[电气工程—电器]