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本文利用参数辩识的思想对一单机无穷大电力系统进行辩识以获得其数学模型,同时在辩识过程中考虑了噪声的影响,从而使得到的模型更能准确地反映实际系统。在辩识模型的基础上按最小方差控制原理设计了一离散型自动电压调节器。为避免出现静态偏差,采用了离散最小方差控制与连续积分控制相结合的方式,收到了良好的效果。这种控制方式实现非常简单。仿真结果表明,在各种情况下其性能均优于常规PI调节器,因此具有较高的实用价值。
In this paper, the idea of parameter identification is used to identify a single machine infinite power system to obtain its mathematical model. At the same time, the influence of noise is considered in the process of identification, so the model can reflect the actual system more accurately. Based on the discerning model, a discrete automatic voltage regulator is designed according to the principle of minimum variance control. In order to avoid static deviation, the discrete minimum variance control and continuous integral control are combined to achieve good results. This control is very easy to implement. The simulation results show that its performance is superior to the conventional PI regulator under various conditions and therefore has high practical value.