Converter based Frequency Adjustment and Protection of Grid-tied Wind Farm

Frequency adjustment and protection of a wind turbine due to wind gust is a salient aspect of the grid-tied wind farm. Both of them require conserving system stability. This paper presents an investigation of the converter based frequency adjusting method and wind turbine protection. A grid-tied wind power system model using the Doubly Fed Induction Generator in MATLAB is used. To regulate the active power output, synchronization between wind velocity and wind turbine speed is adjusted. Thus, wind farm operated at grid frequency and maximize turbine output. The control strategy of the converter based frequency synchronization of a grid-tied wind farm also includes protection subsystem. The protection system executed by receiving information from the logical block implemented in the wind farm model. It provides wind turbine protection by terminating wind turbine from a grid in abnormal wind conditions. The Simulation result validates the results and control methods.

I. Introduction

A huge amount of electricity is required to meet up the growth of electricity demand due to the industrial revolution and modern civilization. The conventional power generation sources such as thermal, nuclear power, hydroelectric, geothermal are using throughout the world. Most of these power plants create harmful effects on the environment. All though we can’t avoid these power plants totally, nonetheless it is possible to minimize those energy usages. Optimal generation mix from different sources is considered to be one of the key elements for the economic growth of a country [1]. The worldwide energy policy concerned with the utilization of renewable energy resource [2]. By combining the traditional energy and renewable resources, an optimized low-cost and environment-friendly power systems can be planned. Among renewable, the wind energy’s share sharply rises, and it’s growing penetration demands for flexible supply resources and various options [3].