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1.国家电网有限公司,北京市 100031
2.南瑞集团有限公司(国网电力科学研究院有限公司),江苏省南京市 211106
3.国电南瑞科技股份有限公司,江苏省南京市 211106
4.东南大学电气工程学院,江苏省南京市 210096
Received:25 August 2021,
Revised:2021-12-31,
Published Online:15 April 2022,
Published:10 July 2022
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葛得辉,华定忠,王齐等.基于虚拟回路阻抗的低压台区异常工况分析方法[J].电力系统自动化,2022,46(13):104-111.
GE Dehui,HUA Dingzhong,WANG Qi,et al.Analysis Method for Abnormal Operation Condition in Low-voltage Distribution Station Area Based on Virtual Circuit Impedance[J].Automation of Electric Power Systems,2022,46(13):104-111.
葛得辉,华定忠,王齐等.基于虚拟回路阻抗的低压台区异常工况分析方法[J].电力系统自动化,2022,46(13):104-111. DOI: 10.7500/AEPS20210825002.
GE Dehui,HUA Dingzhong,WANG Qi,et al.Analysis Method for Abnormal Operation Condition in Low-voltage Distribution Station Area Based on Virtual Circuit Impedance[J].Automation of Electric Power Systems,2022,46(13):104-111. DOI: 10.7500/AEPS20210825002.
宽带载波通信技术大幅提升了用电信息采集数据的频度和广度,深入挖掘计量大数据的应用价值是当前研究的热点。首先,文中针对辐射型拓扑结构的低压配电网构建了包含两段式虚拟回路阻抗的电路模型,即用户虚拟干线阻抗与虚拟支线阻抗,并剔除三相不平衡的干扰,采用多元约束线性回归模型实现两类虚拟阻抗的精准计算。然后,进一步深入分析台区拓扑异常、用户窃电和线路异常等几种典型异常运行工况的运行机理,提出台区异常工况的分析方法,形成基于虚拟回路阻抗时序稳定性以及空间相似性的组合诊断策略,有效支撑电网公司开展设备运维和用电检查工作。最后,以中国河北省某供电所为例进行工程应用分析并开展现场核查,验证了所提方法的有效性。
Broadband carrier communication technology has greatly increased the frequency and breadth of data collection for electricity consumption information
and in-depth exploration of the application value of metrology big data is a current research hotspot. First
aiming at the low-voltage distribution network with a radial topology
this paper constructs a circuit model with two-stage virtual loop impedance
that is
the user's virtual trunk line impedance and virtual branch line impedance; and achieves accurate calculation of two types of virtual impedances by eliminating the interference of the three-phase imbalance and adopting a multi-constraint linear regression model. Then
the operation mechanism of several typical abnormal operation conditions in the distribution station area is analyzed
such as topology abnormality
electricity theft by users
and line abnormality. And an analysis method for the abnormal operation condition perception of distribution stations is proposed
forming a combination diagnosis strategy based on timing stability of virtual loop impedance and spatial similarity to effectively support the equipment maintenance and power consumption inspection task of the power grid company. Finally
a power supply station in Hebei Province of China is taken as an example
and engineering application analysis and on-site verification are carried out
which fully verify the effectiveness of the proposed method.
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