Power Oscillation Damping Improvement by adding Multiple Wind Farms to Wide-Area Coordinating Controls

A. LEÓN; J. SOLSONA

IEEE TRANSACTIONS ON POWER SYSTEMS

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC

Lugar: New York; Año: 2014 vol. 29 p. 1356 - 1364

0885-8950

In this study, an observer-based state-feedback approach is considered to build a power oscillation damping (POD) controller, implemented through coordinated control actions of multiple power system devices. Particular focus is made on the potential ability of several variable-speed wind farms to be coordinated along with flexible ac transmission systems and synchronous generators to damp low-frequency oscillation modes and enhance the power system transient stability. The wide-area POD controller is able to manage multiple measurement channels, and presents a time-delay compensation stage to mitigate adverse effects of latency involved in wide-area communication systems. Several practical issues are discussed: measurement andcontrol selection, model order reduction for the controller design, transmission time-delay compensation, impact of the POD control on wind farms, and robustness aspects. The control performance is evaluated using eigenvalue analyses and nonlinear time-domain simulations over a wide range of operating conditions, such as severe system faults, N-1 outage contingencies, load/generation shedding and line tripping.