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振荡中心迁移下的电网失步解列策略

DOI: 10.13334/j.0258-8013.pcsee.2014.22.027, PP. 3799-3805

Keywords: 振荡中心迁移,失步,解列判据,解列策略,母线频差

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Abstract:

振荡中心迁移严重危害电网的安全稳定,选取合适的解列判据,准确定位并实施解列具有重要意义。基于等值两机系统推导分析振荡中心迁移的理论原因,分析失步过程中电压的变化特点,依据两侧系统频率差与失步中心出现频率的对应关系提出基于支路两端母线频率差的失步解列判据;针对振荡中心迁移对失步解列控制的影响,提出了基于广域测量信息的自适应失步解列策略。通过对某区域互联电网进行仿真分析,发现振荡中心迁移现象,认为失稳模式的改变是振荡中心迁移的直接原因,并进行解列策略的仿真验证。仿真结果证明了所提出的解列策略的有效性。

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