A Conservation Voltage Reduction Scheme for a Distribution Systems with Intermittent Distributed Generators

Pyeong-Ik Hwang, Seung-Il Moon and Seon-Ju Ahn
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Pyeong-Ik Hwang: Korea Electric Power Research Institute (KEPRI), 105 Munji-Ro, Yuseong-gu, Daejeon 34056, Korea
Seung-Il Moon: Department of Electrical and Computer Engineering, Seoul National University, 1 Gwanak-ro, Gwank-gu, Seoul 08826, Korea
Seon-Ju Ahn: Department of Electrical Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Korea

Energies, 2016, vol. 9, issue 9, 1-18

Abstract: In this paper, a conservation voltage reduction (CVR) scheme is proposed for a distribution system with intermittent distributed generators (DGs), such as photovoltaics and wind turbines. The CVR is a scheme designed to reduce energy consumption by lowering the voltages supplied to customers. Therefore, an unexpected under-voltage violation can occur due to the variation of active power output from the intermittent DGs. In order to prevent the under-voltage violation and improve the CVR effect, a new reactive power controller which complies with the IEEE Std. 1547 TM , and a parameter determination method for the controller are proposed. In addition, an optimal power flow (OPF) problem to determine references for the resources of CVR is formulated with consideration of the intermittent DGs. The proposed method is validated using a modified IEEE 123-node test feeder. With the proposed method, the voltages of the test system are maintained to be greater than the lower bound, even though the active power outputs of the DGs are varied. Moreover, the CVR effect is improved compared to that used with the conventional reactive power control methods.

Keywords: conservation voltage reduction; distributed generator; distribution system; reactive power control; volt/var control (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2016
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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