A literature survey on load frequency control considering renewable energy integration in power system: Recent trends and future prospects

• This literature surveys the recent development in LFC techniques for different traditional as well as a renewable energy-based power system. • The merit and demerit of different proposed controllers of the relevant research work are investigated with the help of a comparison table. • Based on the literature survey a comparative analysis of the LFC scheme in conventional as well as renewable power systems is presented. • Challenges and opportunity of the proposed application of renewable energy sources (RES) integrated with LFC is precisely summarized and clearly demonstrated. • The explanatory review covers all the technical core recent trends of LFC mechanism for the present era of the modern power system. • This comprehensive literature survey is very helpful for researchers to bridge the gap between research, development, and implementation. The electrical power system has experienced several changes during the last decade, raised by continuously increasing load demand, rapid depletion in fossil fuels, and newly electrical deregulation policy. In the past, numerous review literatures has been published in the field of Load Frequency Control (LFC), which deals with different and recent control strategies for the successful operation of the power system. Moreover, due to changes in lifestyle, increasing load demand, expansion of industrialization, and environmental issues, Renewable Energy Sources (RES) integration becomes the obvious adaptive choice. Since generation from RES is stochastic in nature and depends upon the weather condition and other aspects at every instant of time. Therefore, high penetration may reflect specific issues regarding voltage instability, frequency stabilization, and reliability obstruction. Hence this issue has been covered effectively in this review work. Furthermore, the work precisely summarized and briefly explained the different scenarios of Energy Storage (ES), micro-grid and Flexible AC Transmission System (FACTS) to explore the possible solutions and future aspects. The merit and demerit of different controllers are also investigated with the help of a comparison's tables and also some other analytical comparisons. The overall study examines an in-depth review of recent technical core aspects for LFC based on classical and modern power system which involves the non-linear model, controller design parameters, soft-computing application, attributes of Load forecasting, as well as integration of RES in a deregulated environment. This effective, comprehensive literature survey is very helpful for researchers to bridge the gap between recent development, implementation, challenges and future trends of RES in LFC.