Power quality improvement of distribution power networks using capacitor‑less H‑bridge inverters for voltage regulation

A. Angamuthu; M. Sundaram; V. Balaji

Power quality improvement of distribution power networks using capacitor‑less H‑bridge inverters for voltage regulation

A. Angamuthu

M. Sundaram

V. Balaji

Vol. 22, No. 3, pp. 478-489, Mar. 2022

10.1007/s43236-021-00373-y

Voltage fluctuation

Pulse width modulation

Capacitor-less H-bridge inverter

Injection transformer

Abstract

These days FACTS devices are predominantly used to improve the power quality in distribution networks to meet the standards. The dynamic voltage restorer (DVR) plays a vital role in maintaining voltage in a distribution power substation at standard levels. DVRs can compensate a short period of sag or swell in a power network. Currently, many industries employ a servo-controlled voltage stabilizer at their premises to compensate voltage fluctuations and swells that occur for a longer period of time. Servo-controlled voltage stabilizers take about 20–30 power cycles to compensate fluctuation. The operation of sensitive equipment fails due to this inefficient compensation. This paper presents a solution for both voltage fluctuations and prolonged low voltage profiles at distribution networks. The proposed switching algorithm for the H-bridge inverter compensates grid voltage fluctuations by injecting compensating voltage without utilizing a DC bulk capacitor unlike a DVR. A prototype developed in the laboratory is tested experimentally and the obtained test results verify the extended feature of the proposed solution.

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Cite this article

[IEEE Style]

A. Angamuthu, M. Sundaram, V. Balaji, "Power quality improvement of distribution power networks using capacitor‑less H‑bridge inverters for voltage regulation," Journal of Power Electronics, vol. 22, no. 3, pp. 478-489, 2022. DOI: 10.1007/s43236-021-00373-y.

[ACM Style]

A. Angamuthu, M. Sundaram, and V. Balaji. 2022. Power quality improvement of distribution power networks using capacitor‑less H‑bridge inverters for voltage regulation. Journal of Power Electronics, 22, 3, (2022), 478-489. DOI: 10.1007/s43236-021-00373-y.