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Open AccessArticle

Voltage Reduction in Medium Voltage Distribution Systems Using Constant Power Factor Control of PV PCS

1
Department of Electrical Engineering, Graduate School of Engineering, Tohoku University, Miyagi 980-8579, Japan
2
Kyushu Electric Power Co., Inc., Fukuoka 815-8720, Japan
*
Author to whom correspondence should be addressed.
Energies 2020, 13(20), 5430; https://doi.org/10.3390/en13205430
Received: 18 September 2020 / Revised: 12 October 2020 / Accepted: 13 October 2020 / Published: 17 October 2020
Reverse power flow from a photovoltaic (PV) system in a distribution system causes a voltage rise. A relative study regarding the reduction in the distribution feeder voltage depending on system conditions and the magnitude of reverse power flow has been conducted. Several methods for mitigating voltage rise have been proposed; however, the influence of these methods on the voltage in the distribution system, where the voltage is reduced due to reverse power flow, remains to be determined. In this study, the effect of constant power factor control in low-voltage PV systems, which are widely used as voltage rise countermeasures in distribution systems, was analyzed under the condition that the distribution line voltage decreases due to reverse power flow. Consequently, the constant power factor control of the low-voltage distribution system was found to adversely reduce voltage in the medium voltage distribution system due to the consumption of lagging reactive power by the PV systems. View Full-Text
Keywords: distributed power generation; photovoltaic systems; power quality; power distribution; power system analysis computing; power system measurements; reactive power; reverse power flow; voltage fluctuations; voltage regulation distributed power generation; photovoltaic systems; power quality; power distribution; power system analysis computing; power system measurements; reactive power; reverse power flow; voltage fluctuations; voltage regulation
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MDPI and ACS Style

Iioka, D.; Fujii, T.; Tanaka, T.; Harimoto, T.; Motoyama, J. Voltage Reduction in Medium Voltage Distribution Systems Using Constant Power Factor Control of PV PCS. Energies 2020, 13, 5430.

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