What is it about?

Renewable energy systems (RESs) pose significant challenges to conventional grids such as frequency variation, voltage fluctuation, and harmonics. It is because of the stochastic and random nature of RESs and may cause problems in the future if left unaddressed. Therefore, this article is written to provide a deep insight into the literature about RESs integration in the conventional grid. It also covers the application of energy storage systems (ESSs) in RESs and their development phase. The role of ESSs in increasing lifetime, efficiency, and energy density of power systems having RESs have been reviewed. Moreover, different techniques to solve critical issues like low efficiency, harmonics, and inertia reduction in photovoltaic (PV) systems have been presented. Unlike most of the available review papers, this article also investigates the impact of flexible AC transmission system (FACTS) technology in a RESs-based power system using multitype FACTS controllers. Three simulation models have been developed in MATLAB/Simulink. The results show that FACTS devices help to maintain the stability of RESs integrated power systems. This review paper is believed to be of potential benefit for researchers from both the industry and academia to develop a better understanding of challenges and solution techniques for renewable energy based power systems and future research dimensions in this area.

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Why is it important?

In the modern world, only conventional energy resources cannot fulfill the growing energy demand. Electricity is a fundamental building block of a technological revolution. Today, most of the electricity demand is met by the burning of fossil fuels but at the cost of adverse environmental impact. To bridge the gap between electricity demand and supply, nonconventional and eco-friendly means of energy generation are considered. RESs offer an adequate solution to mitigate the challenges originated due to greenhouse gasses (GHG). However, they have an unpredictable power generation with specific site requirements. Grid integration of RESs may lead to new challenges related to power quality, reliability, power system stability, harmonics, subsynchronous oscillations (SSOs), and reactive power compensation. The integration with ESSs can reduce these complexities that arise due to the intermittent nature of RESs.

Perspectives

The key efforts started by leading author Mr. Abdul Basit by a review of the current renewable energy system, and after updating this, the shape of the paper changes from a review of renewable energy sources to Limitations, challenges, and solutions approaches in grid-connected renewable energy systems. Co-Author and our MS supervisor lead the paper revision and quality improvement of the paper.

Saad Dilshad
COMSATS University Islamabad

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This page is a summary of: Limitations, challenges, and solution approaches in grid‐connected renewable energy systems, International Journal of Energy Research, May 2020, Wiley, DOI: 10.1002/er.5033.
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