Grid frequency fluctuations with the issue of high wind power penetration

Abstract

Now a day's worldwide energy problem is one of the great problems. Wind energy, a renewable and environmental friendly, is an important source of electrical power in recent years. As wind turbine output is proportional to the cube of wind speed, the wind turbine generator output fluctuates due to wind speed variations and highly variable at several different timescales from hour to hour, daily, and seasonally, can have an influence on the power system frequency. This paper investigates the influence of the ratio of the wind generator capacity to the power system capacity, on the power system frequency. To do this, impacts of thermal and hydro governor control system models are presented to show the performance of single synchronous generator. This study will be helpful for taking preventive measures for the power grid companies to improve the stability and quality of electric power. Simulation analyses have been carried out to investigate the performance of the power system frequency with the increased wind power penetration using real wind speed data. The wind speed data used in the analysis is the real data, which is measured in Hokkaido Island, Japan. The simulation analyses have been performed by using PSCAD/EMTDC.