Isolated Site Wind System Start-Up System

Abstract

The abundant energy available in nature can be harnessed and converted to electricity in a sustainable way to supply the necessary power to elevate the living standards of the people without access to the electricity grid. Wind power is one of the cleanest and safest of all the renewable commercial methods of generating electricity. However, wind energy is difficult to use due to its stochastic variability. Energy storage can overcome the main drawback. This article consists of studying a wind starting system based on DFIG and operating in isolated mode. This system is formed by a bank of batteries and a bidirectional DC/DC converter charging a DC bus voltage as well as these batteries. The control of this system required a cascade control. Such control needs two loops: the inside loop to control the inductive current and the outside one for continuous voltage bus. The theoretical study of this command has been validated using PSIM software.