A New Photovoltaic Topology with Reliable and Reactive Power Capability

B. Obulapathi*, Shaik Hussain Vali**
*Junior Research Fellow, Visvesvaraya National Institute of Technology (VNIT), Nagpur, Maharashtra, India.
**Assistant Professor and Research Scholar, Department of Electrical and Electronics Engineering, JNTUACEP, Andhra Pradesh, India.
Periodicity:October - December'2018
DOI : https://doi.org/10.26634/jee.12.2.15058

Abstract

The photovoltaic technology is one of the base sources of distributed generations for future generation, but it lacks certainty in power production. Absence of transformer in DC/AC conversion will reduce the cost and volume of the PV inverter. The absence of transformer creates galvanic isolation problem that produces leakage currents between grid and PV panel. The grid connected PV inverters with bipolar SPWM is able to supply active and reactive power to grid. The bipolar SPWM has high switching losses and voltage stress across the filter inductor, which is double the supply voltage. The conventional unipolar SPWM mitigates voltage stress and switching losses, but it lacks reactive power capability. In this paper, a new topology is proposed to give solutions to the above mentioned problems associated with reliability, leakage currents, and reactive power capability in a single topology. A transformerless H6 inverter is used to reduce leakage currents. A modified unipolar SPWM technique is applied to H6 inverter to mitigate voltage stress and switching loss with reactive power capability. A battery storage system is also connected between PV panel and inverter to make PV system reliable at least in power supply.

Keywords

H6 inverter, common mode voltage, reactive power capability, battery storage

How to Cite this Article?

Bobulapathi, B., and Vali, S. H. (2018). A New Photo Voltaic Topology with Reliable and Reactive Power Capability. i-manager’s Journal on Electrical Engineering, 12(2), 32-41. https://doi.org/10.26634/jee.12.2.15058

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