摘要
为分析交流配电网直流化改造效果,需要在考虑交直流关键设备本身可靠性的前提下,对混合交直流配电网的可靠性和经济性进行评估。首先,针对包含分布式电源的混合交直流配电网提出可靠性和经济性评价指标,以换流器、直流断路器、线路、换流站、变压器成本和停电成本构建目标函数,分析了设备本身可靠性;然后用改进狼群算法对模块化多电平换流器以及直流断路器进行配置优化,用蒙特卡洛法计算各配置方案的可靠性指标和目标函数;最后,对不同方案之间的各项指标进行了对比。对比结果表明,所提优化配置方案可以综合提高配电网可靠性和经济性。
In order to analyze the DC transformation effect of AC distribution network,it is necessary to evaluate the reliability and economy of hybrid AC and DC distribution network on the premise of considering the reliability of AC and DC key equipment.Firstly,the reliability and economic evaluation indexes are proposed for the hybrid AC/DC distribution network including distributed generation.The objective function is established based on the cost of converter,DC circuit breaker,line,converter station,transformer and outage cost,and the reliability of the equipment is analyzed.Then the improved wolf swarm algorithm is used to optimize the configuration of modular multilevel converter and DC circuit breaker,and the Monte Carlo method is used to calculate the reliability index and objective function of each configuration scheme.Finally,the indicators of different schemes are compared.The comparison results show that the proposed optimal configuration scheme can comprehensively improve the reliability and economy of distribution network.
作者
苏海锋
武泽君
赵岩
王天瑞
SU Haifeng;WU Zejun;ZHAO Yan;WANG Tianrui(School of Electrical and Electronic Engineering,North China Electric Power University,Baoding 071003,China)
出处
《电力科学与工程》
2022年第8期1-11,共11页
Electric Power Science and Engineering
基金
国家重点研发计划(2017BJ0080)。
关键词
直流配电网
分布式电源
可靠性评估
换流器
蒙特卡洛法
配置优化
DC distribution network
distributed power
reliability assessment
inverter
Monte Carlo method
configuration optimization
