Performance Evaluation and Filter Design Aspects of Single-Phase Inverter under Different Loading Conditions

ABSTRACT

This paper describes the power quality issues at the output of an inverter. The role of a filter and its design aspects at the output of a single-phase inverter in order to minimize the different harmonic content associated with various modulation schemes is illustrated. The relationship of the cut-off frequency of a second-order filter along with the switching frequency as well as on the type of modulation is established. The procedure to choose the values of L and C components of LC filter to reduce the overall THD following the IEEE std.1547 is also illustrated. The performance of the total system for different linear and non-linear loading conditions along with variations in input voltage and output loading is evaluated. The entire system and its performance is verified using MATLAB-based simulink models and satisfactory results are obtained.

Abbreviations: CT: current transformer; MI: modulation index; MPWM: multi pulse width modulation; PI controller: proportional integral controller; PR controller: proportional-resonant controller PWM: pulse width modulation; SPWM: sinusoidal pulse width modulation; THD: total harmonic distortion; VT: voltage transformer

Keywords:

• Unipolar modulation
• Bipolar modulation
• Total harmonic distortion
• Current ripple
• LC filter
• Linear load
• Non-linear load

Acknowledegments

The authors acknowledge the University Grant Commission (UGC), India, for providing necessary support and infrastructural facility under the auspices of UGC SAP-DRS-II project.

Additional information

Notes on contributors

Pritha Roy

Pritha Roy received a BTech degree in electrical engineering from College of Engineering and Management, Kolaghat, in 2009, MTech in electrical engineering from the University of Calcutta, in 2012. She has worked as an Assistant Professor in Gargi Memorial Institute of Technology, WBUT (2012–2015). Her research interest is on power electronics and microgrid.

Jitendra Nath Bera

Jitendra Nath Bera is associated with the department of Applied Physics, University of Calcutta, Kolkata. He has obtained his BTech and MTech degrees from the University of Calcutta and PhD from Jadavpur University. He has more than 30 research publications in national and international journals. His research areas include smart grid, power system, electrical machines, control system, wireless communication, and embedded system.Email: [email protected]

Gautam Sarkar

Gautam Sarkar is associated with the department of Applied Physics, the University of Calcutta, Kolkata. He has obtained his BTech, MTech and PhD degrees from the University of Calcutta. He has more than 70 research publications in national and international journals. His research areas include power system, electrical machines and control system.Email: [email protected]

Sumana Chowdhuri

Sumana Chowdhuri is associated with the department of Applied Physics, University of Calcutta, Kolkata. She has obtained her BTech, MTech and PhD degrees from Jadavpur University. She has more than 25 research publications in national and international journals. Her research areas include power electronics, smart grid, microgrid and electrical machines.Email: [email protected]