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电网技术  2013 

计及保护故障因素的电网脆弱性评估模型

, PP. 3208-3213

Keywords: 保护故障因素,电气介数,风险重要度,单元保护脆弱度,脆弱性评估模型

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Abstract:

电网中存在的某些脆弱环节对电力系统大规模停电和连锁故障的发生有着重要的影响。在已有脆弱性研究的基础上,给出了考虑保护故障因素的电网脆弱性评估模型。基于风险理论和保护事故链模型提出了保护风险重要度的概念,并以此定义了单元保护脆弱度,该指标量化了保护不正确动作对电网中单元脆弱性的影响程度;由此,提出了结合电气介数与单元保护脆弱度的电网脆弱性评估模型。算例结果表明所提模型有效地计及保护故障因素对电网单元脆弱性的影响,克服了考察角度单一的弊端,更加全面地评估了电网的脆弱环节,验证了模型的合理性和有效性。

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