10 kV直流配电网混合式断路器结构设计

Structural Design of Hybrid DC Breaker in 10 kV DC Distribution Network

基于10 kV直流配电网示范工程要求及二极管整流型混合式拓扑结构,文中首先介绍了直流断路器的整体布局结构;然后提出了阀组模块化设计方案,阐述了各模块的设计选型过程,通过理论计算及仿真分析设计了主支路散热系统及IGBT硅堆结构,研制了额定电压10 kV,额定电流1 kA,最大开断电流10 kA,开断时间小于3 ms的混合式直流断路器产品;最后试验结果表明:直流断路器在10 kV配电网中运用的可行性和有效性。

This paper,based on the requirement of pilot project of 10 kV DC distribution network and the diode rectifier hybrid topological structure,presents firstly the overall layout structure of the DC circuit breaker.Then the modular design solution of valve group is proposed and the design selection process of each module is described.The cooling system for main branch and IGBT silicon stack structure are designed on the basis of theoretical calculation and simulation analysis.As a result,the hybrid DC circuit breaker with rated voltage at 10 kV,rated current at 1 kA,maximum breaking current at 10 kA and breaking time less than 3 ms is developed.Finally,the test result shows both application feasibility and effectiveness of this type of DC circuit breaker in 10 kV distribution network.