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含有限PMU的配电网故障区域在线辨识算法

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为实现有限同步相量测量装置(phasor measurement unit,PMU)布局下的配电网快速故障区域辨识,研究了一种低PMU数量依赖的配电网故障区域在线辨识算法.提出了PMU布局与区域划分原则,分析了故障发生前后流入正常区域与故障区域的三相电流变化差异,利用所采集电流数据构建了多维时空状态监测矩阵,并定义了基于2-范数的谱范数比值系数,用于对多维状态监测矩阵降维、量化各区域故障前后的电气状态变化差异,从而实现快速、准确的配电网故障区域在线辨识.利用IEEE 33节点配电仿真系统以及6节点实际试验平台验证了所提方法的有效性,仿真结果与实际试验结果表明:在有限PMU量测信息下所提方法受故障类型、中性点接地方式、过渡电阻影响较小,具备一定抗噪性;在通信不满足严格同步等情况下所提方法依然能够快速、准确地完成配电网故障区域在线辨识.
Fault Section On-Line Identification Algorithm with Limited PMU for Distribution Network
In order to realize fast fault section identification in distribution network with limited synchronous phase measurement unit(PMU)layout,an on-line fault section identification algorithm for distribution network with low PMU number dependence is studied.The PMU layout and area division principles are proposed,and the differences in the three-phase current between the normal area and the faulted area before and after the fault occurrence are analyzed.A multi-dimensional spatial and temporal state monitor-ing matrix is constructed using the collected current data,and a 2-parametric-based spectral parametric ratio coefficient is defined for dimensionality reduction of the multi-dimensional state monitoring matrix to quantify the differences in electrical state changes before and after the fault in each area,so as to achieve fast and accurate on-line fault location in the distribution network.In this paper,the effectiveness of the proposed method is verified by using IEEE 33-node distribution simulation system and 6-node actual test platform.The simulation results and actual test results show that the proposed method is less affected by the fault type,neutral grounding mode,and transition resistance under the limited PMU measurement information,and has certain noise immunity.The proposed method can quickly and accurately identify fault sections in the distribution network even in the case of asynchronous communication.

distribution networkspectral parametric numberphasor measurement unit(PMU)fault section identification

王彩强、张青、李晨、黄志勇、梁财源、何思名

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广东电网有限责任公司云浮供电局,广东 云浮 527300

南方电网科学研究院,广州 510663

配电网 谱范数 相量测量装置 故障区域辨识

2024

南方电网技术
南方电网科学研究所有限责任公司

南方电网技术

CSTPCD北大核心
影响因子:1.42
ISSN:1674-0629
年,卷(期):2024.18(12)