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电网技术  2015 

计及暂态过电压约束的直流闭锁安控与极控协调控制研究

DOI: 10.13335/j.1000-3673.pst.2015.09.023, PP. 2526-2531

Keywords: 暂态过电压,二次压升,极控系统,安控系统,协调控制策略

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Abstract:

大容量直流闭锁引起的送端暂态过电压可能影响近区风电的稳定运行,针对计及该过电压时直流闭锁控制问题,首先,研究了直流闭锁引起的暂态过电压过程,分析了交直流运行方式对过电压水平的影响;其次,依据电网实际案例分析极控切滤波器和安控切机动作时序,揭示了二者时序配合不当则可能引起“二次压升”的潜在风险;最后,提出了直流闭锁送端暂态过电压运行分析原则和协调控制方法,并以某特高压直流典型方式为算例对所提方法进行验证。研究结果证明了所提方法的有效性。

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