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电网技术  2015 

电网运行趋势实时安全评估方法

DOI: 10.13335/j.1000-3673.pst.2015.02.028, PP. 478-485

Keywords: 安全分析,趋势评估,在线计算

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Abstract:

当前电网的运行状态愈加复杂,实时控制愈加困难,在短时间内进行准确、快速、全面地评估其运行趋势,对其运行安全至关重要。而现有的基于状态指标与风险指标的研究方法,均不能很好地同时保证评估全面性和快速性的双重要求。以在线实时运行评估为着眼点,以状态指标体系为基础,提出了包含初步评估和精确计算2步骤的电网运行趋势实时安全评估方法。其中,初估是结合模糊理论,利用负荷重要度所得到的区域重要度指标,判断发生冲击事件后系统的运行趋势,快速确定问题区域;精算是利用所提出的状态指标体系,确定并计算具体的危险指标。这样,既可满足实时评估的快速性要求,又可兼顾确定性状态指标体系的全面性。最后,以某区域电网运行断面为例,验证了所提评估方法的可行性。

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