Implementation of modified switching table for direct power control of shunt active power filter

ABSTRACT

The direct power control (DPC) technique has been proposed as an alternative method to sophisticated current control techniques in order to synthesise the instantaneous active and reactive powers fed by the inverter into the grid. The method selects the voltage vector of the inverter based on the quantised values of the instantaneous active and reactive power errors and thereby controls the power exchange between inverter and the Point of Common Coupling (PCC) directly. The method has better dynamic performance, an inherent decoupling of active and reactive powers and robustness against parameter variations. However, the application of DPC to shunt active power filter (SAPF) requires high sampling frequency in the digital controller and at the same time suffers from the issue of the large variation in the switching frequency. This work proposes implementation of a modified switching table of DPC using multisector Discrete Space Vector Modulation(DSVM) concept for the SAPF to alleviate the problem of high sampling frequency requirement and variation in switching frequency and reduce burden on the controller. The performance of the method is evaluated in MATLAB Simulink® environment, verified with 2 kVA laboratory prototype under various load conditions and compared with constant switching frequency-predictive deadbeat DPC method.

KEYWORDS:

• Direct power control
• power filters
• power system harmonics
• pulse width modulation inverters
• space vector modulation

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was supported by the Gujarat Council of Science and Technology under the Minor Research Project Scheme. Grant No: [GUJCOST/MRP/2016-17/503].

Notes on contributors

Tapan Trivedi

Tapankumar Trivedi completed M. Tech. from Indian Institute of Technology (IIT), Roorkee and Ph.D. from Charotar University of Science and Technology, Gujarat, India. He is working as an Assistant Professor in Department of Electrical Engineering, Marwadi University, India. His areas of interest include Power Quality Improvement devices, control of power electronic converters and Multiphase drives. He has received research grant for projects Evaluation of Current Control Strategy and Direct Power Control Algorithm for Shunt Active Power Filter and Rescue Support Robotics for Earthquake Situations from GUJCOST (Gujarat Council of Science and Technology, Government of Gujarat).

Rajendrasinh Jadeja

Rajendrasinh Jadeja is working as a Dean at the Faculty of Engineering, Marwadi University -Gujarat, India. He has been awarded the title “ING.PAED. IGIP” in 2020 and is also a Senior Member of IEEE. He is working as a Treasurer of IEEE Region-10 and also worked as a Chair of IEEE Gujarat Section during the years 2017-2018. The areas of Research and Interest include control of Power Electronic Converters, AC drives, Pulse Width Modulated Power Electronic Converters, and Power Quality Issues and Mitigation Techniques. Various projects have been undertaken and also completed a project funded by GUJCOST (Gujarat Council of Science and Technology) and he is working on a project making “Deep Learning and AI skills” mainstream in India, to fulfil trilateral needs of entrepreneurship, Industry-academia partnership, and application-inspired Engineering Research. He actively participates and initiates ERASMUS+ for staff mobility and has also completed such a program for teaching between partner countries.

Praghnesh Bhatt

Praghnesh Bhatt received B.E. and M.E. degree in Electrical Engineering from India in 1999 and 2003, respectively. He received PhD in Electrical Engineering from S V National Institute of Technology (SVNIT), Surat, India in 2012 in area of Automatic Generation Control with FACTS and Wind Turbine Generators. He is working as an Associate Professor at Pandit Deendayal Energy University (PDEU), Gandhinagar, India and has fifteen years of teaching experience in Electrical Power Systems. His areas of interest are power System Dynamics and Stability, Power System Protection, Grid Integration of Renewable Energy Sources, Smart Grid and Power Electronics Applications in Power System.

Amit Ved

Amit Ved received the B.E, (Electrical Eng.) degree from Lukhdheerji Engineering College, Morbi, India, in 1997, M. E. (Microprocessor System and Appl.) from M.S. University, Baroda in 2001 and the Ph.D. degree from RK University, Rajkot, India, in 2020, in electrical engineering. He is an Associate Professor and Head with the Department of Electrical Engineering at Marwadi University since 2015. He has academic experience of over 20 years in academics and industry. His research interests include Battery management system, integration of renewable energy sources into electrical networks, power quality issues, embedded system applications and His teaching covers Fundamental of hybrid and electrical vehicles, Battery management Systems, AC Machine Design, Electromagnetic field theories and Microcontrollers.