抄録
This paper proposes an effective method for designing coordinated H∞ PSS's to improve the damping of local and interarea oscillations. Target modes, types of inputs of the PSS, and effective locations for each controller are examined using the participation factor and residue concept. To realize coordination of the controllers, a method for constructing the reduced model effective for this design is presented, minimizing the uncertainty for each controller. With such a small uncertainty, a tight design which yields marginal robustness can be realized, increasing the performance of each controller as well as that of the total system. The influence of the reduced model on the controller characteristics is discussed. The effectiveness of the proposed control design is demonstrated through nonlinear numerical simulations in a five-machine seven-bus system under two critical operating conditions.
