Stability and power-flow control of a multi-machine power system connected with a hybrid offshore wind farm using a unified power-flow controller

Abstract

This paper presents the stability and power-flow control results of a multi-machine power system connected with a hybrid offshore wind farm (OWF) of 160 MW through a unified power-flow controller (UPFC). The q-d axis equivalentcircuit model is employed to establish the complete system model of the integration of the hybrid OWF, UPFC and the multimachine power system under three-phase balanced loading conditions. Steady-state performance of the proposed UPFC on power-flow control of the studied system is evaluated. Transient simulation results under a three-phase short-circuit fault are also performed. It can be concluded from the simulation results that the proposed UPFC can achieve power-flow control and render damping to suppress oscillations of the studied multi-machine power system connected with the hybrid OWF under various operating conditions. Index Terms--Transient stability, power-flow control, multimachine power system, offshore wind farm, unified power-flow controller, transient simulations.

Archives of Electrical Engineering

“…In addition, references [18][19][20] note that flexible AC transmission system (FACTS) devices can not only strengthen the system stability and reliability but also enhance the utilization efficiency of renewable resources by constantly controlling the power flow of transmission lines. The simulation curve of [21] indicates that a static synchronous series compensator (SSSC), as a series FACTS device, can reduce the system oscillation amplitude and accelerate the convergence process. Much work in references [22,23] has proven that significant improvements in the damping characteristics, synchronous transmission power and transient stability limit can be achieved when using the SSSC.…”