Performance Evaluation with Capacitive Energy Storage in a Hybrid Wind-Diesel Power System

In this paper, the aggravated increase in energy demand has posed a serious problem for the power system's stability and reliability, and hence has become of major concern. The shortcomings of conventional source of energy have paved way for renewable energy sources. The latter can form a part of a stand-alone system or grid connected system. A single renewable source of energy when integrated with other sources of energy it is termed as hybrid system. This paper deals with the hybrid wind-diesel engine system. Wind diesel hybrid systems (WDHS) obtain maximum contribution from wind and rest by diesel generators. They are handy for rural or island areas. In this work, dynamic performance enhancement of isolated hybrid wind diesel power system with a Capacitive Energy Storage unit (CES) are studied under different conditions. Wind diesel hybrid systems (WDHS) obtain maximum contribution from wind and rest by diesel generators. They are handy for rural or island areas. The variable power consumption as well as intermittent load variation may cause large fluctuations on system frequency. To reduce the system oscillations Capacitive Energy Storage (CES), which will supply and absorb active, reactive powers quickly, can be applied. The performance and the analysis is done in a user friendly MATLAB/Simulink environment by applying a step load and constant load disturbance of 1% in the system. The dynamic responses without and with CES unit are compared. Simulation studies reveal that inclusion of CES unit in the hybrid wind diesel power system improve transient performance of both wind and diesel sides.