计及瞬时通信故障的变压器保护可靠性评估

doi:10.19595/j.cnki.1000-6753.tces.171425

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摘要为了准确评估在IEC 61850-9-2通信网络环境下变压器保护的可靠性,提出一种计及瞬时通信故障的继电保护可靠性模型。将表征保护动作性能的时间纳入到可靠性模型中,利用多阶斐波那契数列构建保护在动作期望时间内失效模型,根据故障识别时间与保护动作期望时间的相关性,提出变压器保护拒动和误动模型。考虑到交换机端口故障对保护功能的影响,建立计及保护失效的采样数据网可靠性模型。给出基于单交换机组网方案的变压器保护安全运行时间计算公式。对变压器空投时和运行时的励磁涌流方案和差动保护方案进行可靠性分析和采样值丢包实验测试。实验结果验证了所提可靠性评估算法的有效性。

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	莫峻
	蔡义明

关键词 ： IEC, 61850-9-2, 可靠性, 瞬时通信故障, 变压器保护, 斐波那契数列

Abstract：To accurately assess the reliability of transformer protection based on IEC 61850-9-2 network communication, a reliability model of relay protection considering transient communication faults was presented. The time reflecting the performance of protection operation was incorporated into the reliability model, and a failure model during expected time of protection operation (ETPO) was built by using multi-order Fibonacci sequence. According to the correlation between the time of fault identification and ETPO, the mis-operation and mal-operation models of transformer protection were proposed. Considering the effect of the fault of switch port on protection function, a reliability model of sampled value (SV) network that takes into account the protection failure was constructed. The calculation formula of security operation time of transformer protection system was given, which is suitable for single switch network. The reliability analysis and SV-loss test were carried out on of in-rush current identification scheme and differential protection scheme corresponding to no-load closing and runtime. The experimental results have verified the effectiveness of the proposed reliability evaluation algorithm.

Key words： IEC 61850-9-2 reliability transient communication fault transformer protection Fibonacci sequence

收稿日期: 2017-10-09 出版日期: 2019-03-01

PACS:

TM772

基金资助:广西自然科学基金项目（2016GXNSFBA380007）和广西高校中青年教师基础能力提升项目（KY2016LX006）资助

作者简介: 蔡义明男,1976年生,硕士,讲师,研究方向为智能电网。E-mail: 42682799@qq.com

引用本文:

莫峻, 蔡义明. 计及瞬时通信故障的变压器保护可靠性评估[J]. 电工技术学报, 2019, 34(4): 807-816. Mo Jun, Cai Yiming. Reliability Evaluation of Transformer Protection Considering Transient Communication Fault. Transactions of China Electrotechnical Society, 2019, 34(4): 807-816.

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27 通信作者:莫峻男,1983年生,博士,讲师,研究方向为电力系统继电保护、网络通信技术及新能源技术.E-mail: mj1232@126.com