Modeling and simulating of a wind energy system with static transfer switch using pscad program

In this thesis, classical power system stability, changes and challenges in the power system with installation of wind energy sources are given. An electromagnetic transient model of a system is composed by wind turbine system (WTS) and static transfer switch (STS). This system presents a technical review of power quality problems associated with the renewable based distributed generation systems and how STS plays an important role in power quality improvement. The highly developed graphic facilities available in PSCAD/EMTDC (Power System Computer Aided Design/Electromagnetic Transient including DC) were used to conduct all aspects of model implementation and to carry out extensive simulation studies. Recently, wind energy has attracted special interest because it is seen as a positive alternative to fossil fuels and many wind power stations are in service throughout the world. The output power of wind turbines fluctuates due to variations of wind speed. These power fluctuations cause frequency deviations, power outage and other power quality problem. In this thesis, a wind turbine system and grid system are connected with Static Transfer Switch and this system is developed by using PSCAD/EMTDC which contains powerful tools for the wind turbine simulation. A thyristor based STS provides a continuous supply for load with fast transfer between wind turbine system and grid system. The aim of the designed system is to improve the power continuity and power quality. A simulation model of wind turbine system and STS were developed, respectively and they were combined with simulation tool of PSCAD/EMTDC.