Design and Analysis of Wide-area Damping Control System of Shandong Power Grid

This paper proposes a systematic design procedure for wide-area damping control(WADC) system in Shandong power grid.In the first place,the oscillatory stability of the system is thoroughly analyzed.The low-order system models are identified using PRBS and PEM for the design and control purpose.Then the feedback signals and controller locations are properly determined based on the dominant mode ratio and the transfer-function model residues,respectively.Finally coordinated and optimized tuning of the multiple controllers' parameters is achieved via constrained nonlinear programming.The developed wide-area control scheme has been tested on the Shandong power grid.Its influence on local modes has also been analyzed.The simulation results have well demonstrated its effectiveness in damping inter-area oscillations and increasing across-region transfer capabilities for Shandong power grid.