Analysis of terminal voltage and output power control of wind turbine generator by series and parallel compensation using SMES

In recent year, the generating power from renewable energy sources is coming up. Particularly, wind turbine generator (WTGs) is attractive because of its advantages such as, pollution free, no fuel cost, abundantly available in nature etc. However, the generated power and the bus voltage is always fluctuating and it mainly depends on the wind speed. A superconducting magnetic energy storage (SMES) unit is capable of controlling both the active and reactive power simultaneously and quickly. In this paper, control systems for active/reactive power simultaneous control and voltage control of the series and parallel compensator using SMES are proposed. It is show through simulations that the controlling sequence of charging and discharging of the SMES coil effectively damps out the tie-line power oscillations and WTG´s terminal bus voltage fluctuations.