Wonsuk Ko

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Muqtedar Khan

University of Delaware

Zelia Breda

University of Aveiro

Professor Dimitrios Buhalis

Bournemouth University

Stanislav Ivanov

Varna University of Management

Anoop Chaturvedi

University of Allahabad

Armando Marques-Guedes

UNL - New University of Lisbon

Harry Cleaver

The University of Texas at Austin

Shabib H . Syed

University of the Punjab, Lahore, Pakistan

Onur Ulas Ince

SOAS University of London

ELCHİN SULEYMANOV

Azerbaijan National Academy of Sciences

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Papers by Wonsuk Ko

Synchronous Reference Frame Theory Based Intelligent Controller for Current THD Reduction

Journal of Electrical Engineering & Technology, Jul 8, 2021

Concerns related to current harmonics have gained increased attention in recent years due to tech... more Concerns related to current harmonics have gained increased attention in recent years due to technological advancement in power electronics and the proliferation of non-linear loads in power distribution system. It has become challenging to limit current total harmonic distortion (THD) at consumer end mainly due to increased penetration of intermittent switching based non-linear loads. Shunt active power filter (SAPF) is considered a marvelous power electronics device to tackle consumer side current harmonics. This paper presents a synchronous reference frame (SRF) based improved control method for compliant working of SAPF to reduce current harmonics in the distribution network with same and different THD levels in three phases. This research work investigates an effectual DC link voltage control technique linked with SRF based control of SAPF to effectively mitigate current harmonics. A fuzzy logic-based automatic switch (FLBAS) is designed according to the THD standards of IET and IEEE for real-time controlling of SRF based control of SAPF. In addition, S-plane stability analysis of the proposed control scheme is performed using the model of SAPF's inverter. It is established that the closed-loop system is asymptotically stable with the proposed control scheme. The presented simulation results validate the effectiveness of the proposed control technique for SAPF robustly.

Calculating the Optimal Capacity of Energy Storage System to Reduce CO 2 Emission for Power System in Je-Ju

The Transactions of the Korean Institute of Electrical Engineers, 2010

ABSTRACT In this Paper, optimal capacity of energy storage and amount of reduction in Jeju is cal... more ABSTRACT In this Paper, optimal capacity of energy storage and amount of reduction in Jeju is calculated. Based on electricity demand data of Je-Ju from 2006 to 2007, the estimation electricity demand from 2009 to 2018 is performed. To calculate the amount of maximum reduction and energy storage capacity in Jeju, the 4th power supply planning and IPCC guideline are used. Finally, Optimal capacity of energy storage and the amount of reduction are showed.

Temperature impact assessment on multi-objective DGs and SCBs placement in distorted radial distribution systems

AIMS energy, 2020

In smart grid distribution systems, the applications of Shunt Capacitor Banks (SCBs) and Distribu... more In smart grid distribution systems, the applications of Shunt Capacitor Banks (SCBs) and Distributed Generations (DGs) are widely known and installed for system loss reduction, voltage stability improvement of system buses, and to free up the system loading. However, the installation of SCBs and DGs in distribution systems with distorted waveforms will increase the harmonic distortion level if they are not placed at appropriate locations. In this paper, a Multiobjective Grey Wolf Optimizer (MOGWO) is proposed to find the optimal size and locations of SCBs and DGs simultaneously with regard to the impact of ambient temperature on distorted distribution systems. Electric utilities will be able to reduce system active losses, enhance the voltage stability for system buses, release the section loading, and reduce the total harmonic distortion level. Fuzzy set theory is utilized to choose the optimum compromise solution from the Pareto front solutions of the MOGWO method. The proposed method is applied to IEEE 69-bus and real data taken from the Saudi Electricity Company (SEC). The results show a higher capability in finding optimum solutions for SCBs and DGs placement in distorted Radial Distribution Systems (RDSs) compared to conventional methods.

A case study of advanced metering infrastructure

International journal of digital signals and smart systems, 2018

In this study, advanced metering infrastructure (AMI) system is developed for the energy manageme... more In this study, advanced metering infrastructure (AMI) system is developed for the energy management system. To prove an efficiency of renewable systems such as wind, PV, and thermal systems, demonstration site that has the monitoring system of AMI system is selected. Next, the energy demand profile of the selected site is investigated to analyse effects of the use of renewable sources. To show the saving cost, real-time pricing (RTP) tariff is applied to the load shifting operating scenario. The result illustrates that electricity cost can be decreased about 11,600 KRW/day and it is equivalent to 9.65 USD/day, 3.8% saving of electricity cost.

An Extensive Experience of Demand Side Management Program: Case Study

In this study, Demand Side Management experience is described based on field experience. To show ... more In this study, Demand Side Management experience is described based on field experience. To show an experience, real contracted capacity and payment between consumer and load aggregator are shown. Power consumption profiles of the selected customers are investigated to calculate CBL (Customer Baseline Load), RRMSE (Relative Root Mean Squared Error) and payments. The result illustrates that demand side management contributes to maintaining electricity market and it gives a benefit and satisfaction to the consumer.

Application of Artificial Intelligence in PV Fault Detection

Sustainability, Oct 25, 2022

This article is an open access article distributed under the terms and conditions of the Creative... more

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