故障分量法在辐射型直流配电网中的应用  

Application of Fault Component Method in Radial DC Distribution Network

作　　者：李珍 苟乐 焦锋 许宏洋 马顺青 LI Zhen;GOU Le;JIAO Feng

机构地区：[1]国网青海省电力公司海东供电公司,青海海东810600 [2]国网陕西省电力有限公司安康供电公司,陕西安康725000 [3]青海卉和工程监理咨询有限公司,西宁810000

出　　处：《科技创新与应用》2023年第32期70-74,共5页Technology Innovation and Application

摘　　要：该文针对辐射型直流配电系统,提出一种故障分量在辐射型直流配电网中的应用方法。根据系统检测装置的分布,将线路两侧系统等效;再对直流配电线路进行π型等值后,应用叠加定理,建立直流配电网的故障分量网络。根据实际互感器的采样方式,设计以70个点为一个周期的故障分量提取方法。最后通过PSCAD和MATLAB软件建模仿真,验证该方法的正确性和有效性。Aiming at the radial DC distribution system,this paper presents an application method of fault component in radial DC distribution network.According to the distribution of the system detection devices,the systems on both sides of the line are equivalent,and then after the progressive equivalence of DC distribution lines,the superposition theorem is applied to establish the fault component network of DC distribution network.According to the sampling mode of the actual transformer,a fault component extraction method with 70 points as a period is designed.Finally,the correctness and effectiveness of the method are verified by modeling and simulation with PSCAD and MATLAB software.

关 键 词：直流配电网 故障分量 辐射型 网络等值 互感器 

分 类 号：TM77[电气工程—电力系统及自动化]