REVIEW OF VOLTAGE MANAGEMENT IN LOCAL POWER GENERATION NETWORK

Electric energy consumption shows the living standard of people of any country. In country like India, there are many places where no electricity is available. A huge population live without access to electricity, possibly the reason may be the location, non-feasibility of the grid connection or due to any political issue. Microgrid/distributed generations (DGs) are big alternative of the utility supply to provide electricity for such regions. If renewable resources of energy are used to generate electricity, it will offer great operating flexibility in such situations. The DGs can operate in grid connected as well as isolated mode from the existing utility grid. Voltage and power management are the main technical challenges in renewable based generation. When generated power depends mainly upon the renewable resources, frequency and voltage variations become more frequent. This draws the attention of the researchers to develop control strategies to establish smooth voltage profile and power sharing among the different units participating in the generation. The control strategies are employed at different level in the microgrid control architecture to control voltage and frequency errors within acceptable limits. The voltage and frequency deviations reflect the necessity of reactive power and active power balance respectively. This paper presents a literature review of various frequency and power sharing control strategies implemented in the microgrid.