基于励磁绕组差模电流基频分量的新型磁阀式并联电抗器匝间保护方案  

Turn to Turn Protection Scheme for Novel Magnetic Valve Controllable Reactor Based on Fundamental Frequency Component of Differential Mode Current of Excitation Winding

作　　者：郑涛 孟令昆 杨剑友 田浩宇 苏毅[3] ZHENG Tao;MENG Lingkun;YANG Jianyou;TIAN Haoyu;SU Yi(State Key Laboratory of Alternate Electrical Power System With Renewable Energy Source(North China Electric Power University),Changping District,Beijing 102206,China;State Grid Wenzhou Electric Power Supply Company,Wenzhou 325000,Zhejiang Province,China;Beijing Sifang Automation Co.,Ltd.,Haidian District,Beijing 100085,China)

机构地区：[1]新能源电力系统国家重点实验室(华北电力大学),北京市昌平区102206 [2]国网温州供电公司,浙江省温州市325000 [3]北京四方继保自动化股份有限公司,北京市海淀区100085

出　　处：《电网技术》2023年第4期1432-1438,共7页Power System Technology

基　　金：国家重点研发计划资助项目(2021YFB2401000)。

摘　　要：作为一种新型无功补偿装置,磁阀式可控电抗器(magnetic valve controllable reactor,MVCR)能够实现无功功率的大范围平滑调节,进而有效解决无功失衡导致的电压波动问题。该文针对一种新型MVCR开展研究,首先介绍了该种新型MVCR的拓扑结构,分析了其正常运行时励磁绕组的电气特性,在此基础上针对新型MVCR励磁绕组和工作绕组发生匝间故障时的故障特性开展研究,其中引入了励磁绕组差模电流的概念来表征匝间故障特征。当匝间故障发生后,新型MVCR励磁绕组差模电流中将产生较大的基频分量。基于该故障特性,提出了一种基于励磁绕组差模电流基频分量的匝间保护方案,并进一步分析了该保护方案在预励磁合闸暂态过程中的适应性。最后,通过Matlab/Simulink仿真实验,验证了该文所提新型MVCR匝间保护方案的可行性及有效性。As a new type of reactive power compensation device,the magnetic valve controllable reactor(MVCR)realizes the smooth regulation of the reactive power in a wide range,and then effectively solve the problem of voltage fluctuation caused by reactive power imbalance.In this paper,a novel MVCR is studied.Firstly,the topology of the novel MVCR is introduced,and the electrical characteristics of the excitation winding during its normal operation are analyzed.On the basis,the fault characteristics of the novel MVCR excitation windings and working windings in case of the inter-turn fault are discussed,and the concept of differential mode current of the excitation winding is introduced to characterize the characteristics of inter turn fault.When the inter-turn fault occurs,there will be a big fundamental frequency component in the differential mode current of the novel MVCR excitation windings.Based on this feature,an inter turn fault protection scheme based on the fundamental frequency component of the differential mode current of the excitation windings is proposed,and the adaptability of this protection scheme in the transient process of the pre-excitation closing is analyzed.Finally,the feasibility and effectiveness of the novel MVCR inter-turn protection scheme proposed in this paper are verified by the Matlab/Simulink simulation experiments.

关 键 词：磁阀式电抗器 励磁绕组 差模电流 匝间故障 预励磁合闸暂态 

分 类 号：TM772211[电气工程—电力系统及自动化]