The issue of Power Quality is very important to both the consumers and the distributors of electric power. There are many facets of power quality disturbances and each has its own source and mitigation techniques. The first step towards any solution for a disturbance is to recognize the presence of a particular type of disturbance and locate its source. Conventional methods for recognition of a...

A MicroGrid can be defined as an electrical network of small modular distributed generating units (whose prime movers may be photovoltaics, fuel cells, micro turbines or small wind generators), energy storage devices and controllable loads. A MicroGrid can operate in grid-connected or islanded mode and hence increase the reliability of energy supplies by disconnecting from the grid in the case ...

The Smart Grid has three main characteristics, which are to some degree antagonistic. These characteristics are: provision of good power quality, energy cost reduction and improvement in the reliability of the grid. The need to ensure that they can be accomplished together demands a much richer ICT monitoring and control network than the current system, which is centrally controlled. In this pa...

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The doubly-fed induction generator (DFIG) is widely used in variable speed wind energy conversion systems (WECS). This paper presents a review on various topologies, configuration, power converters and control schemes used with the operation of the DFIG. The operation of DFIG based on both slip ring and brushless arrangement has been discussed. The grid integration of DFIG and its influence on ...

Fig. 1.1 Shows the circuit configuration for a 19-level (lineto-neutral) H-bridge StatCom (H-StatCom). Each stack ofH-bridges essentially forms one phase of a threephase currentcontrolledvoltage source. The purpose of the H-StatCom isto modulate the voltage at the output of each stack so thatthe current through the inductors can be controlled to providepower factor correction, compensate for sy...