252 kV/85 kA并联开断装置开断过程仿真与击穿特性评估  

Simulation Study and Breakdown Characteristics Assessment on Breaking Process of 252 kV/85 kA Paralleled Short-circuit Current Breaking Device

作　　者：王勇 苏海博 刘俊翔 吴杰 曲德宇 WANG Yong;SU Haibo;LIU Junxiang;WU Jie;QU Deyu(Ouangzhou Power Supply Co.,Ltd.,Guangzhou,Guangdong 510410,China)

机构地区：[1]广州供电局有限公司,广东广州510410

出　　处：《广东电力》2018年第8期104-110,共7页Guangdong Electric Power

基　　金：中国南方电网有限责任公司重大科技攻关项目(KGZM2014-031)

摘　　要：为实现220 kV系统80 kA及以上短路电流的有效开断,提出了通过两台252 kV/63 kA SF_6断路器分别串联高耦合分裂电抗器(high coupled split reactor,HCSR)后并联形成252 kV/85 kA短路电流开断装置的技术方案。首先搭建了252 kV/85 kA短路电流开断装置仿真电路并建立其磁流体动力学电弧模型,再对该开断装置并联均流工况、燃弧特性及开断过程进行仿真研究,分析其开断过程、影响因素及击穿特性;最后对耦合外部电路限流工况、燃弧特性及开断过程进行仿真计算。根据仿真计算结果,对开断装置均流、限流特性的可能影响因素做了研究,对弧后介质击穿特性进行评估并验证了该技术方案的可行性。In order to realize effective breaking of 80 kV and the above voltage level short-circuit of the 220 kV system, this paper presents a technical proposal of respectively connecting two 252 kV/63 kA SF 6 breakers with the high coupling split reactor （HCSR） in series and then forming the 252 kV/85 kA short-circuit current breaking device in parallel. It firstly builds a 252 kV/85 kA short-circuit current breaking device simulation circuit and its magnetohydrodynamics （MHD） arc model, and then makes simulation study on its current sharing condition, arcing characteristic and breaking process, and analyzes its influencing factors and breakdown characteristic. Finally, it makes simulation and calculation for current limiting condition of the coupled external circuit, arcing characteristic and breaking process. According to relevant results, it also studies probable influencing factors on current sharing and limiting characteristic of the breaking device, evaluates post-arc breakdown characteristic of dielectric and verifies feasibility of the technical proposal.

关 键 词：短路电流开断装置 断路器 高耦合分裂电抗器 并联开断 均限流特性 

分 类 号：TM47[电气工程—电器]