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中国电机工程学报 2009, 29(7) 78-83 DOI:
ISSN: 0258-8013 CN: 11-2107/TM |
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| 继电保护、通信及自动化 |
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继电保护隐患的运行风险在线评估 |
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吴文传，吕颖，张伯明 |
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电力系统及发电设备控制和仿真国家重点实验室(清华大学电机系) |
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摘要：
继电保护隐患会导致继电保护不正确动作，危害电网安全。该文从调度中心角度研究继电保护隐患对电网安全的影响，提出了继电保护隐患的运行风险评估方法。采用事件树方法分析计算继电保护隐患的暴发概率，选取严重性指标度量继电保护隐患暴发的后果，用风险作为指标定量评估继电保护隐患对电网安全的影响。针对导致继电保护隐患的2个主要原因：不合理保护定值和继电保护系统硬件缺陷，分别进行运行风险评估。某省级电网的算例表明，通过计算运行风险可以全面定量刻画电网中继电保护隐患，发现继电保护隐患中的薄弱环节。 |
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关键词：
继电保护隐患
运行风险评估
事件树
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On-line Operating Risk Assessment of Hidden Failures in Protection System |
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WU Wen-chuan, Lü Ying, ZHANG Bo-ming |
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State Key Lab of Control and Simulation of Power Systems and Generation Equipments(Dept. of Electrical Engineering, Tsinghua University) |
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Abstract:
Hidden failures in protection system will cause the incorrect action of relay protection and then derogate the power system. From the point of the system control center, the influence of hidden failures of protection relay to power system security was investigated. An operating risk assessment algorithm for hidden failures was developed, which could calculate the conditional probability using event tree method and evaluate the severity of hidden failures. In the proposed method, two main reasons of hidden failures including incorrect relay setting and hardware defect in protection system were both formulated. The operation risk assessment module using the proposed method was tested in a provincial power network in China and proved practical. |
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Keywords:
hidden failures
operating risk assessment
event tree
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收稿日期 2008-04-02 修回日期 2008-08-19 网络版发布日期 2009-03-13 |
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DOI: |
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基金项目:
国家重点基础研究发展计划项目(973项目)(2004CB217908)；国家自然科学基金项目(50707013)。 |
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通讯作者: 吴文传 |
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作者简介: |
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| 本刊中的类似文章 |
| 1．宁辽逸 吴文传 张伯明 李想.运行风险评估中缺乏历史统计数据时的元件停运模型[J]. 中国电机工程学报, 2009,29(25): 26-31 |
| 2．宁辽逸 吴文传 张伯明.一种适用于运行风险评估的元件修复时间概率分布[J]. 中国电机工程学报, 2009,29(16): 15-20 |
| 3．宋毅 王成山.一种电力系统连锁故障的概率风险评估方法[J]. 中国电机工程学报, 2009,29(4): 27-33 |
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