Detection method for single-pole-grounded faulty feeder based on parameter identification in MVDC distribution grids
Detection method for single-pole-grounded faulty feeder based on parameter identification in MVDC distribution grids
复制标题
MVDC配电网中基于参数辨识的单极接地故障馈线检测方法
DOI：
10.1016/j.ijepes.2017.10.039
复制
发表时间：
2018-04
影响因子：
5.2
通讯作者：
Kazmi Tassawar
中科院分区：
文献类型：
--
作者：
Song Guobing;Luo Juan;Gao Shuping;Wang Xiaowei;Kazmi Tassawar
在不接地或高阻抗接地的MVDC配电系统中，单相接地故障馈线的检测是一项具有挑战性的任务，因为这种故障不能提供持续和可观的故障电流。针对这一问题，分析了径向MVDC系统的零模故障网络，提出了一种基于对地电容的馈线零模故障网络辨识算法。然后在外部故障存在的前提下，建立了各馈线零模网络的数学模型。利用各馈线的暂态零模电压和电流计算零模故障网络的对地电容。对于健康馈线，零模故障网络是其自身的零模网络，并且计算的对地电容为正。但故障馈线的零模故障网络是其背景健康系统的等效零模网络，其计算的对地电容为负。这一特性是该算法的理论基础。考虑到计算误差的影响，利用计算电容的平均值和偏差的极性以及正的计算电容的个数来检测故障馈线。仿真结果表明，该算法准确、可靠，对高阻抗接地故障检测更加灵敏。指标项：MVDC配电网;单相接地故障;故障馈线检测;参数辨识
Detection of the single-pole-grounded faulty feeder in ungrounded or high-impedance grounded MVDC distribution systems is a challenging task, because such fault cannot provide persistent and considerable fault current. To solve this problem, zero-mode fault network of radial MVDC system is analyzed and an algorithm based on identification capacitance to ground of the feeder’s zero-mode fault network is proposed. Then on the premise of external fault, the mathematical model of zero-mode network is built for each feeder. The transient zero-mode voltages and currents of each feeder are utilized to calculate the capacitance to ground of zero-mode fault network. For the healthy feeder, the zero-mode fault network is its own zero-mode network and the calculated capacitance to ground is positive. But zero-mode fault network of faulty feeder is an equivalent zero-mode network of its background healthy system and its calculated capacitance to ground is negative. This characteristic is the basic theory of the proposed algorithm. Considering the calculation error, the polarity of the average value and deviation of calculated capacitances and the number of positive calculated capacitances are used to detect the faulty feeder. The simulation results have shown that the proposed algorithm is accurate, reliable and more sensitive to detect high impedance ground faults.Index terms: MVDC distribution grids; single-pole-grounded fault; Faulty feeder detection; parameter identification
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DOI：
10.1109/cyber.2015.7288223
发表时间：
2015-06
期刊：
2015 IEEE International Conference on Cyber Technology in Automation, Control, and Intelligent Systems (CYBER)
影响因子：
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作者：
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发表时间：
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期刊：
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DOI：
10.1109/icsens.2012.6411550
发表时间：
2012-10
期刊：
2012 IEEE Sensors
影响因子：
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DOI：
10.1109/pes.2008.4596844
发表时间：
2008-07
期刊：
2008 IEEE Power and Energy Society General Meeting - Conversion and Delivery of Electrical Energy in the 21st Century
影响因子：
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作者：
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影响因子：
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