已有限流器优化配置方法大多以电阻、电感型限流器为配置对象,且只考虑每条线路均配置限流器的工况,降低系统经济效益,因此提出一种计及新型柔性直流限流器(novel flexible fault current limiter,NFFCL)运行特性、位置、数量等因素的优化配置方法.首先基于换流站和NFFCL简化模型,构建含NFFCL直流系统故障电流计算模型,并在 5 节点直流系统验证其准确性;其次,以NFFCL成本、限流效果为目标函数,以断路器最大开断电流为约束条件,构建多目标优化配置模型,并对NSGA-Ⅱ算法中的拥挤度计算进行改进,以实现优化配置过程中 NFFCL 安装数量与容量的解耦;最后,采用改进拥挤度计算的 NSGA-Ⅱ算法求解得到 11 节点直流系统的NFFCL优化配置方案,并通过限流器成本、安装数量、限流效果之间的关系选取最终方案.
Most of the existing current limiter optimal configuration methods take resistive and inductive current limiters as configuration objects,and only consider the situation that each line is equipped with a current limiter,which reduces the economic benefit of the system.Therefore,an optimal configuration method considering the operating characteristics,position,and quantity of novel flexible fault current limiter(NFFCL)are proposed in this paper.Based on the simplified model of converter station and NFFCL,a DC system fault current calculation method with NFFCL is constructed,and its accuracy is verified in the 5-node DC system.The cost and current limiting effect of NFFCL are taken as the objective functions and maximum breaking current of circuit breaker is taken as the constraint,then an optimal configuration model is constructed,and the congestion calculation in NSGA-Ⅱ algorithm is improved to decouple the relationship between NFFCL installation quantity and capacity.Finally,the NFFCL optimal configuration scheme of 11-bus DC system is ob-tained by using NSGA-Ⅱ algorithm with improved congestion calculation,and the final scheme is selected according to the relationship among cost,installation quantity and current limiting effect.
郑峰;郑泽楠;孙涛;伍仰金;郑传良;陈志东
福州大学电气工程与自动化学院,福州 350108国网湖北省电力有限公司神农架供电公司,神农架 442422国网福建省电力有限公司宁德供电公司,宁德 352100国网甘肃省电力有限公司兰州供电公司,兰州 730070
多端直流系统;柔性限流器;故障电流计算;NSGA-Ⅱ算法;优化配置
multi-terminal DC system;flexible DC current limiter;fault current calculation;NSGA-Ⅱ algorithm;op-timization configuration
《高电压技术》 2024 (005)
2078-2087,中插23-中插26 / 14
国网湖北省电力有限公司科技项目(5215N0220001).Project supported by Science and Technology Project of State Grid Hubei Electric Power Co.,Ltd.(5215N0220001).
10.13336/j.1003-6520.hve.20221167
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