Virtual Inertia Based Frequency Regulation of Microgrid With PSS Under Renewable Source Integration

Abstract

Electrical power system is one among the biggest and composite systems in the world. This system may always undergoes different types of disturbances that may cause to the loss of synchronism of the system. To prevent this, Power system stabilizers (PSS) are being used in order to damp these oscillations and hence to maintain stability of the system. Lead-lag compensation methods are used in the conventional type power system stabilizer, where it have a fixed gain settings for particular operating condition. In renewable energy sources (RES) the system inertia will be decreased due to the presence of power electronic inverters used to connect to the grid. This reduction in system inertia due to large integration of RESs causes unwanted impact to micro grid dynamic stability, and hence the system security, and may also lead to total blackouts and also damages to the complete system equipment. Therefore, maintaining the dynamic security in micro grids is one of the important challenges faced by the modern electrical world. This reduction in inertia will be improved by virtual inertia based control strategy. The important control purpose of the intended work is to enhance the stability and to increase the system dynamic response. The execution of the suggested controller shows enhanced results when evaluated with the system without the controller. This work is done in SIMULINK environment and the performance of the systems are investigated.