Publications:
August 31, 2022
Abstract: This paper proposes a control algorithm for single-phase battery inverters to provide voltage unbalance compensation in distribution networks with high penetration of photovoltaic panels and electric vehicles. A typical distribution system is studied to quantify the impact of single-phase loads and generating units on voltage unbalance levels, and identify the conditions that lead to the highest voltage unbalance. Voltage unbalance compensation is then performed by regulating active and reactive power exchange between three single-phase battery energy storage units and the power grid.
February 14, 2022
Abstract: Due to increasing penetration of Inverter-based Resources (IBRs), harmonic distortion is a growing power quality challenge. To improve the accuracy of harmonic studies including IBRs, detailed models are required, but data from manufacturers are difficult to obtain or proprietary. This paper compares the ideal current-source IBR model with a generic impedance-based model, that does not require detailed knowledge of the control system.
January 25, 2022
Abstract: The increasing penetration of single-phase equipment in the distribution system, such as photovoltaic (PV) inverters and electric vehicle (EV) chargers, may cause an increase of voltage unbalance levels, thus leading to detrimental effects on the distribution system and the equipment connected to it. This research work aims to control single-phase battery energy storage (BESS) units to mitigate unbalance conditions.
Modelling Renewable Energy Sources for Harmonic Assessments in DIgSILENT PowerFactory: Comparison of Different Approaches
July 7, 2021
Abstract: With the increasing number of Renewable Energy Sources connected to the power grid, the impact on system operation is becoming more evident. To assess this impact, accurate computer models are required for both the power system and the connected devices […] This paper analyses various settings, solvers and harmonic source models in a commercial software – DIgSILENT PowerFactory – to ensure accurate calculation and correct interpretation of harmonic assessment […]
A Novel Deep Learning Power Quality Disturbance Classification Method using Autoencoders
Abstract: Automatic identification and classification of power quality disturbances (PQDs) is crucial for maintaining efficiency and safety of electrical systems and equipment condition.
Voltage Unbalance Mitigation by Novel Control of BESS Single–phase Inverters
Abstract: A voltage unbalance compensation method using three single-phase battery energy storage systems (BESSs) is proposed in this paper. A novel control strategy based on orthogonal signal generation is presented to regulate active and reactive power injection from the BESS inverters. A modified version of the ‘IEEE 13 node’ benchmark three-phase distribution system is built […]
Battery Energy Storage Systems in the United Kingdom: A Review of Current State-of-the-Art and Future Applications
Abstract: The number of battery energy storage systems (BESSs) installed in the United Kingdom and worldwide is growing rapidly due to a variety of factors, including technological improvements, reduced costs and the ability to provide various ancillary services. The aim of this paper is to carry out a comprehensive literature review on this technology, its […]