Distributed set membership estimation method based on centrosymmetric polyhedron

The invention provides a distributed set membership estimation method for voltage estimation of a grid-connected power generation system; a process disturbance and noise range is described by adoptinga central symmetry polyhedron, a state set can be effectively estimated by utilizing information of a plurality of measurement points, the limitation that only a state value can be estimated in the existing method is broken through, and grid-connected safety control is served. Besides, the dynamic error recursion of the voltage estimation is obtained by the initial state range, so that the systemstate set range at any moment is obtained at each measurement node, a basis can be provided for the subsequent distributed monitoring of the voltage abnormality, and the application range is expanded. 本发明针对并网发电系统的电压估计提出了一种分布式集员估计方法，采用中心对称多面体描述过程扰动和噪声范围，能够利用多个测量点信息有效估计出状态的集合，突破了目前已有方法只能估计状态值的限制，为并网安全控制服务。此外，本发明中电压估计的动态误差递推由初始状态范围得到，因此在每个测量节点都得到了任意时刻的系统状态集合范围，可以为后续的电压异常的分布式监测提供基础，扩展了应用范围。