Closed-loop identification of power system with multiple disturbances
多干扰情况下的电力系统闭环辨识研究

Small fluctuations caused by random changes of loads exist continuously in power grids, which are called ambient signals. We put forward a method of using wide-area measured ambient data to identify the power system model. This model reflects accurate operating conditions currently, and provides information for solving problems in system analysis and controller design. The closed-loop identification of system with multiple disturbances is theoretically studied, including the closed-loop identifiability, the consistency and the convergence. The requirements for realizing the closed-loop identification are summarized. Simulation examples validate the theoretical research results.