电力电子接口负荷的动静综合模型

Composite dynamic-static model of power electronic interfaced loads

近年来,越来越多的用电设备通过电力电子装置接入电网,对负荷特性产生显著影响,而传统负荷模型中缺乏对电力电子接口负荷的描述。为此,提出描述电力电子接口负荷的动静综合模型,该模型是一种非机理模型,其建立不依赖于对负荷实际工作机理的详细描述,不同类型的电力电子接口负荷可以采用相同的模型结构,这使得模型简洁,参数少,且具有较好的适应性。推导获得动静综合模型的方程,提出对模型中静态和动态参数分开确定的方法。利用典型电力电子接口负荷的实测数据获得动静综合模型,验证结果表明,所提模型能够有效描述电力电子接口负荷。

In recent years,more and more electrical equipments are connected to the power grid through power electronic devices,which significantly impacts load characteristics.However,the traditional load models lack the description of power electronic interfaced loads.Therefore,a composite dynamic-static model is pro⁃posed to describe the power electronic interfaced loads.The model is a non-mechanism model,and its establishment does not rely on detailed description of the actual operation mechanism of the loads.Different types of power electronic interfaced loads can adopt the same model structure,which makes the model con⁃cise with fewer parameters and has better adaptivity.The equations of composite dynamic-static model are derived,and a method is proposed to separately determine the static and dynamic parameters in the model.The composite dynamic-static model is obtained by the measured data of typical power electronic inter⁃faced loads,and the verification results show that the proposed model can effectively describe the power electronic interfaced loads.