非线性控制理论在有源滤波技术中的应用
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有源电力滤波器作为一种消除电网谐波的强有力的工具，正在蓬勃发展着，但是在实际应用中还存在一些问题，同时向非线性控制理论提出了更高的要求。作者认为，以下几个方面是将来的研究重点。虽然目前将非线性控制理论应用于有源电力滤波器刚刚处于初期阶段，但有源电力滤波器与非线性控制理论的紧密结合将是一个具有生命力的发展方向。
对于反馈线性化，其控制器的建立需要系统的精确模型。虽然一方面, 可以通过设计鲁棒非线性控制器来处理模型的不确定性；但在另一方面，如何建立适当的非线性模型来设计非线性控制器值得研究。必须针对有源滤波器本身的特点开展对系统建模和控制的研究。此外目前大部分研究是基于连续系统模型，因此有必要研究离散的非线性控制规律。反馈线性化方法通过抵消系统的非线性将原非线性系统线性化 ,进而利用成熟的线性系统的设计方法。不过 ,并不是所有系统的非线性对系统的动态特性的改善都具有相反作用。对特殊的非线性系统适当的利用非线性阻尼 ,相信可以得到更好的动态性能。
自抗扰控制是一种不依赖于对象模型的非线性控制策略，鲁棒性和适应性都很强，具有重大的理论意义和使用价值。此控制应用于有源滤波器将有很广泛的前景。
参考文献
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