对称电容谐振式高压直流装置送能系统

Symmetrical capacitive resonant high-voltage DC device energy supply system

高电位驱动电路的送能系统是保证混合式直流断路器稳定工作的关键设备。与目前"磁隔离"送能原理不同,利用电容器"隔直通交"特性和LC电路串联谐振原理,提出一种对称电容谐振式高压直流装置送能系统,实现了地电位侧电能向高电位直流侧装置的高效传输。分析了该送能系统的工作原理,并针对该拓扑结构提出了电路参数设计原则和设计方法以及若干衍生拓扑结构。通过仿真对具体算例进行验证,仿真结果表明在直流故障工况下该送能系统仍然可以稳定工作,进而验证了所提新型送能系统的可行性和可靠性。

The energy supply system of high potential drive circuit is the key device to ensure the stable operation of hybrid DC circuit breaker.Different from the current"magnetic isolation"energy supply principle,based on the capacitance characteristics of DC isolation and AC passed and the series resonant principle of LC circuit,a symmetrical capacitive resonant high-voltage DC device energy supply system is proposed to realize the highly efficient energy supply from ground-potential side to high-potential DC side.The working principle of the proposed energy supply system is analyzed,and the para-meter design principle and method based on the proposed topology structure are proposed,together with a certain number of derived topologies.The simulative results show that the energy supply system can still work stably under DC fault,which verifies the feasibility and reliability of the proposed novel energy supply system.