A Method of Constructing Wide-area Damping Controller with Iterative Identification for Improving Power System Stability

摘要

#$%^&*AU2020101603A420200910.pdf#####ABSTRACT The invention relates to a method of constructing an iterative identification Wide-areaDamping Controller(WADC) for improving the stability of a power system, and belongs to the technical field of power system identification and control. The method described by this invention includes: Selecting a low-order power system initial model and a corresponding initial wide-area damping control model, using a recursive least-squares method for identifying the low order power system initial models, obtaining a set of power system identification models, using a v-gap formula to acquire a v-gap distance between the power system model and the set of power system identification model, and obtaining the maximum distance based on the power system model; further obtaining the stability margin of power system model and WADC. According to the v-gap distance and stability margin, selecting a few sets of power system identification models and satisfying the conditions which the optimal power systems identification models can obtain the corresponding wide-area damping controller models are put forward. In this method, a power system optimal identification model and a wide-area damping optimal control model can be obtained, so that the control stability of the power system is further improved.1/4 e(q) r() + u(t) Gq0) +u y(t) K(q, 0) FIG, 1