Battery Sizing for Inertia Improvement in Wind Energy Integrated Network

Renewable energy sources (RESs) have gained enormous importance in the last decade. The negative impact of the fossil fuel-based generating station on the environment and human life has resulted in integration of large-scale RESs with the grid. However, there is concern that the inertia of power systems will decrease due to penetration of large amount RESs which are interfaced to the grid using power electronics based converter. With reduced inertia, electrical grids are inefficient to resist frequency deviations from its nominal operating value in the first few seconds following a disturbance. This paper focus on the improvement of the system inertia for a network integrated with wind generator using energy storage system (ESS). Integration of ESS will improve grid frequency stability by providing the inertial response (IR). In order to carry out this evaluation, the New England 39 Bus system model is used. Some of the synchronous generators are replaced by wind generator sources. By estimating the ESS size the inertial response of the system is improved. Furthermore, in order to carry out a pragmatic analysis, a model of a Lithium-ion battery based energy device is considered. The simulations were performed in PSCAD software and the results highlight the performance of the proposed method.