基于信息冗余的电力系统分布式状态估计

摘要

随着智能变电站的不断发展,二次系统中模拟量信息的网络化传递方式给电力系统分布式状态估计带来新的研究内容.提出基于二次系统信息冗余的分布式状态估计方法,给出了分布式状态估计架构,并利用模拟量间冗余关系建立线性静态分布式状态估计模型.进一步通过算例验证基于信息冗余的电力系统分布式状态估计方法.算例结果表明,该方法能够有效降低模拟量误差并提高上传模拟量的准确性.%With the development of smart substation, information sharing and its redundant transmission of analog quantities in secondary system provide new research ideas for distributed state estimation of power system. This paper proposes distributed state estimation method based on information redundant of secondary system and gives its structure and content and builds a linear static model of distributed state estimation by using redundant relationship of analog quantities. Furthermore, a numerical example is designed to simulate and verify the proposed method. The experiment results show that the method can effectively reduce absolute error of analog quantities and improve uploading analog quantities reliability.