Study on Output Power of Wind Farm Composed of Current-Source Series-Connected Wind Turbines

The output power of a wind farm composed of current-source series-connected wind turbine/generators with thyristor rectifier circuits that does not require offshore substation is studied. The steady-state operating characteristics for a single wind turbine/generator are examined first for the IEA 15MW offshore reference wind turbine. Then, dynamic performances for a single wind turbine/generator as well as for a wind farm (WF) consisting of 36 wind turbines are simulated for an average wind speed of 8.65 m/s considering offshore wind turbulence. The simulation results show that the ratio of the standard deviation of the output fluctuation to the average output of single wind turbine is 39.38%, while that of WF is 6.24%, confirming that output leveling effect is achieved.