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电力系统大容量非线性元件动态差分修正跟踪控制算法

DOI: 10.13334/j.0258-8013.pcsee.2014.13.019, PP. 2172-2177

Keywords: 大容量非线性元件,动态相关分析,系统辨识,动态差分修正

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Abstract:

新能源发电和灵活输配电设备的规模化投运,加剧了大电网的强非线性及动态特性,为提高系统控制的灵活可靠性,提出一种电力系统非线性元件的时变参数差分修正跟踪控制算法,以磁控高抗(magneticallycontrolledshuntreactor,MCSR)为例阐述算法的思路,控制目标是保持接入点线路电压稳定,抑制工频过电压,实现电压快速平滑调节,防止和减少系统振荡.针对外在电力系统与MCSR的相关性,对MCSR的非线性元件部分和外在系统的动态影响建立时变参数的曲线回归方程,映射换算后以解析解求出时变参数;采用时变参数差分法进行动态修正,提高了映射和跟踪的实时性和精确性.控制算法无需迭代,以MCSR为例在电力系统全数字实时仿真装置(advanceddigitalpowersystemsimulator,ADPSS)中搭建算例,算例结果验证了控制算法的有效性.算法有利于提高和改善电力系统非线性设备在电网中动态调控效果,也可为其他大容量非线性元件控制器的设计提供了思路.

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