摘要
与传统交流配电网不同,直流配电网主要由大量电力电子设备构成,为评估其可靠性,建立了电压源型换流器、直流变压器和直流断路器的可靠性模型,分析了器件级冗余和设备级冗余对直流配电网可靠性指标的影响,对比分析了是否区分功能故障和绝缘故障对直流配电网可靠性指标的影响。并以双端电源直流配电系统为例,对这些影响因素进行了定量分析。研究结果表明,设备级冗余比器件级冗余更能有效地提高系统的可靠性,是否区分功能故障和绝缘故障主要对配备较少直流断路器的直流配电网的可靠性评估有影响。
Different from traditional AC distribution network, DC distribution network is mainly made up of a lot of power electronic devices.To assess reliability of MV DC distribution, reliability models of VSC converter, DC transformer and DC circuit breaker were established to analyzedevice and equipment level redundancy effects on DC distribution system reliability and difference between effects of function failure and insulation failure on DC distribution system reliability. Taking double side power supply DC distribution system for example, influencing factors are quantitatively analyzed and calculated. Comparison results show that equipment level redundancy is better than device level redundancy in improving system reliability, anddifference between function failure and insulation failure mainly influences on reliability calculation of DC distribution system equipped with less DC circuit breakers.
出处
《电网技术》
EI
CSCD
北大核心
2016年第3期725-732,共8页
Power System Technology
基金
国家863高技术基金项目(2013AA050104)~~
关键词
直流配电网
可靠性
器件冗余
设备冗余
功能故障
绝缘故障
DC distribution network
reliability
device redundancy
equipment redundancy
function failure
insulation failure
