有限量测下基于零序电压推算的有源配电网区域保护方法OA
Zero-sequence Voltage Estimation Based Regional Protection Method for Active Distribution Networks Under Limited Measurement
微型同步相量测装置等高精度量测设备的研发,为区域保护方法的研究提供了技术支撑,然而,考虑到现场实际情况和经济性,在全网所有节点都布置μPMU并不现实.故而,针对小电阻接地配电网,首先提出了在有限μPMU布局下的节点零序电压推算方法;然后基于电压推算方法,计算了故障区域内未知节点的零序电压值;进而确定故障点与故障区域内各线路的相对位置系数α.由此,构建了故障线路识别判据,并提出了一种接地故障区域保护方法.最后,仿真分析验证了所提方法的有效性.
Recent advancements in high-precision measurement devices,such as mirco-phase measurement unit(μPMU),offer technical support for regional protection schemes.However,deploying μPMU across all network nodes remains impractical due to economic and practical constraints.Therefore,under low-resistance grounded distribution network conditions,a node zero-sequence voltage estimation method was proposed under limited μPMU deployment.Furthermore,this method was applied to estimate unknown zero-sequence voltages at nodes within fault regions,enabling calculation of the relative position coefficient α between fault points and regional lines.Based on α,a fault line identification criterion was established,forming a regional protection scheme.Finally,simulation results validate the effectiveness of the proposed method.
李娟;姜云龙;朱睿;杨雄
国网江苏省电力有限公司电力科学研究院,江苏 南京 211103国网江苏省电力有限公司电力科学研究院,江苏 南京 211103国网江苏省电力有限公司电力科学研究院,江苏 南京 211103国网江苏省电力有限公司电力科学研究院,江苏 南京 211103
信息技术与安全科学
配电网区域保护零序电压推算有限量测逆变式分布式电源
distribution network regional protectionzero-sequence voltage estimationlimited measurementinverter interfaced distributed generator(DG)
《电气传动》 2026 (8)
49-58,10
国家电网有限公司科技项目(J2023102)
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