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电网技术  2007 

基于脆弱割集选择紧急控制地点的灵敏度分析方法

, PP. 21-26

Keywords: 紧急控制,脆弱割集,电压校正,主导不稳定平衡点,分布因子,灵敏度分析,电力系统

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Abstract:

紧急控制是维持大扰动下电力系统稳定运行的重要手段。选择有效的控制地点是一个重要问题,提出了一种基于脆弱割集来选择紧急控制地点的方法。首先引入电压校正方法,使割集脆弱性指标能够反映故障轨迹,从而更为准确地筛选脆弱割集,然后根据基于割集的灵敏度分析方法选择紧急切机和切负荷的地点。暂态功角失稳引起脆弱割集支路的相角差或功率增大,而紧急功率控制可抑制这种增长。因此割集支路功率对于发电机母线或负荷母线功率的灵敏度,能够反映紧急切机或切负荷控制地点的有效性。基于南方电网模型的故障分析表明,该方法实用有效,可应用于大型电力系统。

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