In recent years, many applications have been developed for the integration of renewable energy sources (RES) into the grid in order to satisfy the demand requirement of a clean and reliable electricity generation. Increasing the number of RES creates uncertainty in load and power supply generation, which also presents an additional strain on the system. These uncertainties will affect the voltage and frequency variation, stability, protection, and safety issues at fault levels. RES present non-linear characteristics, which requires effective coordination control methods. This paper presents the stability issues and solutions associated with the integration of RES within the grid.

This paper reviews the energy storage participation for ancillary services in a microgrid (MG) system. The MG is used as a basic empowering solution to combine renewable generators and storage systems distributed to assist several demands proficiently. However, because of unforeseen and sporadic features of renewable energy, innovative tasks rise for the consistent process of MGs. Power management in MGs that contain renewable energy sources (RES) can be improved by energy storage. The energy storage systems (ESSs) have several merits, such as supply and demand balancing, smoothing of RES power generation, enhancing power quality and reliability, and facilitating the ancillary services like voltage and frequency regulation in MG operation. The integration of ESS technology has become a solution to the challenges the power distribution networks face in achieving improved performance. By simplifying a smooth and robust energy balance within the MG, storage devices match energy generation to consumption. MG, and its multidisciplinary portrait of current MG drivers, tasks, real-world applications, and upcoming views are elucidated in this paper.

This paper proposes an effective management system for stand-alone solar photovoltaic (PV) using real-time data with Hybrid Energy Storage System (HESS). The abrupt movement of fleeting clouds often gives rise to PV power output fluctuations which in turn affect the power quality and system stability due to scattered solar radiation reception. These variations can limit through a ramp-limit controller and employing a DC link controller to maintain the stable DC link voltage. The battery is used in the system for continuous power application and the sudden variations in charging and discharging of battery power can create stress on the battery. These sudden changes in a battery will be removed by the super-capacitor (SC) unit and achieves a fast DC link voltage regulation. Hence, the high energy and power density devices such as battery and SC units will deliver more stable power into the system. The control scheme is tested in Matlab/Simulink and validated by Real-Time Hardware-in-Loop (HIL) simulator using periodic one-minute data for one year from the solar PV power plant from real-time.

In association with increasing in penetration of distributed generation sources (DGs) into power systems, and their power management of different DGs and the grid has elevated as a major concern. Though, Microgrid (MG) is the extensively an accepted concept for the association of DGs in power system networks. Integrating renewable energy sources (RESs), which are often connected via power electronic interfaces into the power grid, can sometimes be a stimulating task just from a purely technical point of view. Thus, the MG is a promising option for future power system interfaces. Evolving the challenges has taken place in terms of the power system control, power quality improvement, reliability, and energy management. The MG operational performance, stability, basic control issues and, concept of MGs are presented in this paper.

This paper proposes an interleaved boost converter for renewable energy application with energy storage system approach. In this, the IBC is employed to sustain the steady DC link voltage and remove the current ripples in the system. The boost converter is utilized in low voltage applications provided by the battery. For high powered systems, the boost converter is not effective to control the system because of its high input current ripple appended to the current circling out from the source and this input current cause diminution in battery lifetime. The IBC is formed by connecting two switches, diodes and inductors in parallel provided with phase shift switching operation. The total load current is the addition of two inductor currents which is having small peak-to-peak ripples. It comprises a fast response and increases the overall system stability. The IBC provides high efficacy, reduced input, and output ripples and maintains high power density. Hence, the IBC is most preferable in high power applications. The aimed system is validated by using a Simulink environment.