Voltage Stability Improvement of Four Parallel Operated Offshore Wind Turbine Using Fuzzy Controller

Abstract—This paper presents the stability enhancement of four parallel-operated offshore Wind Turbine Generators (WTGs) is connected to an onshore power system using a Static Synchronous Compensator (STATCOM). The operating characteristics of each of the four WTGs are simulated by wind permanent magnet synchronous generator while the onshore power system is simulated by a Synchronous Generator (SG) fed to an infinite bus through two parallel transmission lines. A fuzzy controller for the proposed STATCOM is designed by using an adequate damping to the dominant modes of the SG. A frequency domain approach based on a linearized system model using Eigen value analysis is performed while a time domain scheme based on a linear system model subject to disturbances is also carried out. These papers present the voltage enhancement of the offshore wind turbine by using the fuzzy controller and maintain the voltage of 1p.u. Index Terms—Dynamic stability, permanent-magnet synchronous generator (PMSG), static synchronous compensator, wind turbine generator (WTG).Fuzzy controller. I