Multimode operation of PV‐battery system with renewable intermittency smoothening and enhanced power quality

Abstract

Smart grid technology has enabled the bidirectional power exchange between utility and consumers, owning renewable power sources. The major challenge to this feature is the intermittent nature of renewable sources such as photovoltaic (PV), which makes it difficult to exchange a definite amount of power with the grid. This study aims to address this challenge, by proposing a multifunctional PV-battery system to provide intermittency smoothening along with reactive power and harmonics compensation in grid-connected mode and an uninterrupted power supply mode to loads during the grid outage. The PV-battery system comprises of a boost converter, bidirectional DC-DC converter and a grid-connected voltage-source converter (VSC). The boost converter operates the PV array at the maximum power point. The bidirectional converter provides the battery charging and maintains constant DC-link voltage. The VSC uses a multimode controller, which has a current controller for grid-connected mode, voltage controller for standalone mode, a voltage and rate of change of power-based islanding detection and resynchronisation as per the IEEE 1547-2018 revised standard, for mode transitions based on grid availability. Simulated and test results validate the effectiveness of the proposed control in achieving the set objectives.

Performance of Multifunctional Smart PV-Based Domestic Distributed Generator in Dual-Mode Operation

“…A multi-functional PV system control utilizes the inverter used for interface of the renewable source to the grid as a modifier for the harmonics [23][24][25], and variations in the control schemes are carried out to improve performance of various functions. It has been widely accepted that, in the modern smart grids, this is good for both the prosumer as well as the grid side [26][27][28] as the power quality of the supply is improving, which is solving the issue of harmonic distortions introduced into the grid via various converters.…”

Stochastic programming model for incentive‐based demand response considering complex uncertainties of consumers

“…However, high penetration of RESs can give rise to a power mismatch between supply and demand because of the intermittent output of RESs. The conventional solution to mitigate supply–demand imbalance is to build more backup generation capacity, enlarge the capacity of energy storage units (ESUs), or curtail a part of the output of wind power and photovoltaic power [4]. Obviously, the conventional approach is uneconomical and environmentally unfriendly.…”