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电网技术  2015 

考虑发电机励磁保护和OLTC的多时间尺度连锁故障模型

DOI: 10.13335/j.1000-3673.pst.2015.04.030, PP. 1075-1081

Keywords: 连锁故障,多时间尺度,OLTC,发电机励磁保护

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Abstract:

世界范围内多次连锁故障和大停电事故表明,无功电压相关因素对连锁故障具有重要影响。提出了一种计及有载调压变压器(on-loadtapchanger,OLTC)和发电机励磁保护的多时间尺度大停电模型。该模型提出了对无功电压具有重要影响的发电机励磁保护和OLTC动作的建模方法,并进一步基于该模型提出了多时间尺度连锁故障模拟方法,实现了连锁故障动态过程的清晰描述,克服了传统连锁故障模型在此方面的局限性。文中用IEEE30节点系统进行了连锁故障仿真计算,分析了发电机励磁保护、OLTC动作等与无功电压密切相关的因素对连锁故障的影响及机理,并揭示了连锁故障的若干阶段性特征。

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