电力系统保护与控制2025，Vol.53Issue(8)：105-116,12.DOI:10.19783/j.cnki.pspc.240558
计及超级电容快速钳位饱和铁芯电压的直流故障限流器暂态特性研究
Transient characteristics of a DC fault current limiter considering supercapacitor fast-clamped saturated core voltage
摘要
Abstract
With the high proportion of renewable energy integrated into DC distribution networks,their low inertia and weak damping characteristics result in high peak fault currents and rapid rise rates,posing challenges to the breaking capacity and speed of existing DC circuit breakers.Therefore,this paper presents a DC fault current limiter which takes into account ultracapacitor fast-clamped saturated core voltage.The current limiter uses a supercapacitor to rapidly energize the saturated core in series with the main circuit.Upon fault detection,a single phase shift control is used to enable the supercapacitor to discharge quickly,generating a specific slope current in the saturated core to clamp its voltage,thereby effectively suppressing the fault current amplitude.In addition,a current differential criterion is used to distinguish transient and permanent faults.For transient faults,the system executes self-recovery without circuit breaker operation.For permanent faults,the clamping voltage of the saturated core is further increased to force the fault line current to zero,enabling the rapid operation of the DC circuit breaker to isolate the faulty section.Finally,a multi-terminal DC distribution network simulation system is established to verify the effectiveness of the proposed current limiter.The results show that the proposed current limiter can effectively suppress the fault current and eliminate the negative impact of faults on non-fault regions.关键词
直流配电网/超级电容/饱和铁芯/故障限流和隔离/钳位电压Key words
DC distribution network/supercapacitor/saturated core/fault current limiting and isolation/clamping voltage引用本文复制引用
郑峰,黄雯锋,林燕贞,梁宁,刘宝谨..计及超级电容快速钳位饱和铁芯电压的直流故障限流器暂态特性研究[J].电力系统保护与控制,2025,53(8):105-116,12.基金项目
This work is supported by the National Natural Science Foundation of China(No.52167010). 国家自然科学基金项目资助(52167010) （No.52167010）
福建省自然科学基金项目资助(2022J05026) （2022J05026）
