Practical Calculation and Analysis of Load Transfer Ability of Medium Voltage Distribution Lines Based on N-1 Security Criterion

doi:10.3969/j.issn.1000-7229.2015.08.016

Abstract

Abstract:

To determine the load transfer between medium voltage feeders in distribution network, combining with the maximum load current and allowable peer ampacity of the lines and some constraints, a practical method is proposed to calculate and analyze the load transfer based on N-1 security criterion. On the basis of understanding the basic connection relation between the feeders, the possibility of the load transfer is determined, which might be supported by a single feeder or multiple feeders. The transfer capacity and the transfer solution schemes to meet the constraints could be calculated, analyzed and obtained when a feeder starting terminal was in failure. The load loss rate under different fault conditions of one single substation could be obtained by summarizing all the transfer information of the lines from the substation. The practicability and the effectiveness of the method have been verified through the practical engineering application in a real distribution network.

Key words: distribution network, medium voltage, N-1 security criterion, load transfer, peer ampacity, load loss rate

CLC Number:

TM 715

ZHU Xuefei, ZHOU Changcheng, YANG Jianhua, HUANG Lei, ZHANG Jiechao, WANG Zhiyong. Practical Calculation and Analysis of Load Transfer Ability of Medium Voltage Distribution Lines Based on N-1 Security Criterion[J]. ELECTRIC POWER CONSTRUCTION, 2015, 36(8): 95-101.

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