CAJ | 학술논문

混合型直流断路器同时具有传统机械开关良好的静态特性和固态开关无弧快速关断的动态特性,多端直流输电网络很大程度上依赖于直流断路器技术的发展。文中提出了一种基于电弧电压的混合型直流断路器,推导了电流换流物理过程的数学关系。通过有限元分析软件,进行了关键部件———电磁斥力机构高速开关的仿真计算。在以上基础上进行了1 kA/15 kV 直流断路器样机的设计研制,试验结果表明,该样机的电弧最大换流能力为3 kA,电流从高速开关向固态开关转移的过程呈指数关系,与理论推导相符。该样机能够在5 ms 内分断10 kA 短路电流,分断时间主要取决于高速开关开断速度以及电弧电压大小。
혼합형직류단로기동시구유전통궤계개관량호적정태특성화고태개관무호쾌속관단적동태특성,다단직류수전망락흔대정도상의뢰우직류단로기기술적발전。문중제출료일충기우전호전압적혼합형직류단로기,추도료전류환류물리과정적수학관계。통과유한원분석연건,진행료관건부건———전자척력궤구고속개관적방진계산。재이상기출상진행료1 kA/15 kV 직류단로기양궤적설계연제,시험결과표명,해양궤적전호최대환류능력위3 kA,전류종고속개관향고태개관전이적과정정지수관계,여이론추도상부。해양궤능구재5 ms 내분단10 kA 단로전류,분단시간주요취결우고속개관개단속도이급전호전압대소。
The hybrid direct current(DC) breaker has good static characteristics and good dynamic characteristics.The multi-terminal high-voltage direct current (HVDC) transmission network is largely dependent on the development of DC circuit breaker technology. This paper presents a hybrid DC circuit breaker based on arc voltage, and derives mathematical relationship of current-commutation.Simulating the key part-high speed switch by the electro-magnetic repulsion mechanism is performed using finite element analysis.A 1 kA/1 5 kV hybrid DC breaker is designed based on the above research,and the test results show that the prototype”s arc maximum current-commutation capacity is 3 kA.The process of current transfer from high-speed switch to solid state switch accords with the exponential function,and is consistent with theoretical derivation.The prototype can break the short-circuit current less than 10 kA within 5 ms,and the break time depends primarily on high-speed switch and arc voltage.