Model Predictive Control of Transformerless Series Custom Power Device for Voltage Quality Improvement

Abstract

A single-phase series custom power device (Se-CPD), based on model predictive control (MPC), is presented in this paper to compensate for erratic supply voltage conditions such as voltage sag, swell, and harmonics. The control strategy for Se-CPD encapsulates the generation of reference voltage and optimal switching signals for the voltage source inverter (VSI) of the Se-CPD. The reference voltage extraction from the distorted point of common coupling (PCC) voltage is synthesized using a second-order generalized integrator (SOGI) without any phase delay, unlike the case that uses a low-pass filter (LPF). An MPC realizes the generation of optimal switching signals for Se-CPD with its intuitive and straightforward implementation, without any modulation stage, and considers the converter’s switching characteristics in the MPC algorithm itself. The simulation results, using MATLAB/Simulink and the real-time simulation results using the OPAL-RT OP4510 real-time simulator, are presented to validate the SOGI-MPC’s effectiveness for voltage quality improvement.

KEYWORDS:

• Active power filter
• Custom power device
• Model predictive control
• SOGI filter
• Voltage quality improvement

DISCLOSURE STATEMENT

No potential conflict of interest was reported by the author(s).

Additional information

Notes on contributors

Ravi Kumar Majji

Ravi Kumar Majji received the BTech degree in electrical and electronics engineering and the MTech degree in power electronics from Jawaharlal Nehru Technological University, Kakinada, India, in 2012 and 2016, respectively. He is currently pursuing a PhD at the Department of Electrical Engineering, National Institute of Technology Silchar, India in control and power management strategies in grid-connected and islanded ac/dc microgrids and multi-functional power electronic converters. Corresponding author. Email: [email protected]

Jyoti Prakash Mishra

Jyoti Prakash Mishra received the bachelor's degree in electrical engineering from IE, India in 1996 and the MTech degree in energy management from SEES, DAVV, Indore, India in 1999, and PhD degree from IIT Roorkee, India in 2010. He worked as a project officer (Energy) for one year in NITCON, Chandigarh, India during 1999–2000; worked as lecturer (Electrical) for more than two years at DIT, Dehradun, India during 2000–2002, and then joined as research scholar in IIT Roorkee. He joined NIT Silchar, Assam, India in 2006 and is currently working as associate professor with the Department of Electrical Engineering. His research group bagged the IET Electric Power Applications Premium Award 2020 for one of their research papers. His research interests include microgrid control (grid interactive/ autonomous); power electronic converters and their applications to renewable energy systems; power quality, power management issues, and their control, multifunctional, flexible power converters in distribution systems, and electric vehicle applications. Email: [email protected]

Ashish A. Dongre

Ashish A Dongre received the BTech degree in electrical engineering from KDK College of Engineering, affiliated with Nagpur University, India in 2012, and an MTech degree in electrical machines from the Government Engineering College Aurangabad, India in 2015. He is currently pursuing PhD at the Department of Electrical Engineering, National Institute of Technology Silchar, India in distribution systems and electrical drives. Email: [email protected]