Power Grid Fault Location Algorithm Based on Protection State Information and Agglomerated Hierarchical Clustering

doi:10.16628/j.cnki.2095-8188.2022.02.001

Abstract

Abstract:

Aiming at the problem of insufficient accuracy and fault tolerance due to low information utilization of existing fault location algorithms,a fault location algorithm based on protection state information and Agglomerative Hierarchical Clustering (AHC) is proposed.Firstly,the state information of circuit breakers and protective devices in the power grid is obtained by Intelligent Electronic Device (IED) to construct the fault feature vector.Then,AHC algorithm is used to cluster the feature vectors,and the faulty elements are obtained according to the association between elements and IEDs.Finally,it is compared with the existing power grid fault location algorithms based on fuzzy C-means and improved spectral clustering.The results show that the proposed algorithm has the advantages of not necessary to predict the number of clusters in advance,more stable fault location results,and improved accuracy and fault tolerance for IED information.

Key words: power grid fault location, agglomeration hierarchical clustering, protection status information, fault tolerance

CLC Number:

TM732

HE Sen, CHEN Yisen, ZHANG Hourong, ZHENG Wenjian, SONG Yunhai, SHANG Jianing, CUI Mandi, WANG Qi, CHANG An, LAI Guanglin. Power Grid Fault Location Algorithm Based on Protection State Information and Agglomerated Hierarchical Clustering[J]. LOW VOLTAGE APPARATUS, 2022, 0(2): 1-5.

Figures/Tables 4

故障元件	IED信息	AHC分类向量	故障定位结果对比
故障元件	IED信息	AHC分类向量	本文	文献[8]、文献[9]
L4	故障关联IED7、 IED8信息均丢失, 其他信息正常	C= $2121220022222222122222122222$	IED7、IED8 关联L4,正确		文献[8]正确文献[9]正确
	故障关联IED7信息丢失,非关联IED11 信息丢失,其余正常	C= $2121220022022222122222122222$	IED7、IED8、IED11 关联L4,正确		文献[8]正确文献[9]正确
	故障关联IED7部分保护动作信息错误, 其余正常	C= $1010110011111111011111011111$	IED2、IED4、IED7、 IED8、IED17、 IED23关联L4,正确		文献[8]错误文献[9]错误
B3	故障关联IED5、 IED6、IIED7信息均丢失,其余正常	C= $2121000122222222222222222222$	IED5、IED6、IIED7 关联母线B3,正确		文献[8]错误文献[9]正确
	非故障关联IED11、 IED14、IED16、IED22 信息均丢失,其余正常	C= $3131000133233232333332333333$	IED5、IED6、IIED7 关联母线B3,正确		文献[8]正确文献[9]正确
	故障关联IED5部分保护动作信息错误, 其余正常	C= $2121000122222222222222222222$	IED5、IED6、IIED7 关联母线B3,正确		文献[8]正确文献[9]正确

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