Global asymptotic estimation of grid voltage parameters for variable frequency AC systems
Global asymptotic estimation of grid voltage parameters for variable frequency AC systems
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DOI：
10.1109/iecon.2017.8216712
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发表时间：
2017-10
期刊：
影响因子：
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通讯作者：
Zhiyong Dai;Yanan Qiu;Jianwei Li;Chao Zhang-
中科院分区：
文献类型：
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作者：
Zhiyong Dai;Yanan Qiu;Jianwei Li;Chao Zhang-
针对多电飞机变频交流系统，提出了一种用于估计电网电压参数（包括频率、幅值和相角）的观测器。将电网电压视为电网频率未知的动态系统，建立参数化模型，设计自适应观测器，实现对电网电压参数的零稳态误差估计。与现有的大多数局部渐近稳定的电压参数估计方法不同，本文提出的自适应观测器在理论上是全局渐近稳定的，从而保证了本文提出的电压参数估计方法具有更好的稳定性和更快的动态性能。仿真结果验证了该方法的有效性。
This paper presents an observer to estimate grid voltage parameters, including frequency, amplitude and phase angle, for the variable frequency AC systems of more electric aircraft. Regarding grid voltage as a dynamic system with an unknown grid frequency, a parametric model is established, and then, an adaptive observer is developed to estimate grid voltage parameters with zero steady-state error. Unlike most existing voltage parameter estimation methods with local asymptotic stability, the proposed adaptive observer is proven to be globally asymptotic stable in theoretical sound, which ensures that the proposed method has a better stability and faster dynamic performance for voltage parameter estimation. Simulation results are provided to validate the effectiveness of the proposed method.