Optimal Voltage Control Using an Equivalent Model of a Low-Voltage Network Accommodating Inverter-Interfaced Distributed Generators
The penetration of inverter-based distributed generators (DGs), which can control their reactive power outputs, has increased for low-voltage (LV) systems. The power outputs of DGs affect the voltage and power flow of both LV and medium-voltage (MV) systems that are connected to the LV system. There...
Main Authors: | , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
MDPI AG
2017-08-01
|
Series: | Energies |
Subjects: | |
Online Access: | https://www.mdpi.com/1996-1073/10/8/1180 |
id |
doaj-b8aa2f55b7fa4ce68ad15b620b21d2f2 |
---|---|
record_format |
Article |
spelling |
doaj-b8aa2f55b7fa4ce68ad15b620b21d2f22020-11-25T00:10:10ZengMDPI AGEnergies1996-10732017-08-01108118010.3390/en10081180en10081180Optimal Voltage Control Using an Equivalent Model of a Low-Voltage Network Accommodating Inverter-Interfaced Distributed GeneratorsMu-Gu Jeong0Young-Jin Kim1Seung-Il Moon2Pyeong-Ik Hwang3Department of Electrical and Computer Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, KoreaDepartment of Electrical Engineering, Pohang University of Science and Technology, 77 Cheongam-ro, Nam-gu, Pohang 37673, KoreaDepartment of Electrical and Computer Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, KoreaDepartment of Electrical Engineering, Chosun University, 309 Pilmun-daero, Dong-gu, Gwangju 61452, KoreaThe penetration of inverter-based distributed generators (DGs), which can control their reactive power outputs, has increased for low-voltage (LV) systems. The power outputs of DGs affect the voltage and power flow of both LV and medium-voltage (MV) systems that are connected to the LV system. Therefore, the effects of DGs should be considered in the volt/var optimization (VVO) problem of LV and MV systems. However, it is inefficient to utilize a detailed LV system model in the VVO problem because the size of the VVO problem is increased owing to the detailed LV system models. Therefore, in order to formulate and solve the VVO problem in an efficient way, in this paper, a new equivalent model for an LV system including inverter-based DGs is proposed. The proposed model is developed based on an analytical approach rather than a heuristic-fitting one, and it therefore enables the VVO problem to be solved using a deterministic algorithm (e.g., interior point method). In addition, a method to utilize the proposed model for the VVO problem is presented. In the case study, the results verify that the computational burden to solve the VVO problem is significantly reduced without loss of accuracy by the proposed model.https://www.mdpi.com/1996-1073/10/8/1180equivalent model of a low-voltage (LV) systeminverter-based distributed generators (DGs)power lossvolt/var optimization (VVO) |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Mu-Gu Jeong Young-Jin Kim Seung-Il Moon Pyeong-Ik Hwang |
spellingShingle |
Mu-Gu Jeong Young-Jin Kim Seung-Il Moon Pyeong-Ik Hwang Optimal Voltage Control Using an Equivalent Model of a Low-Voltage Network Accommodating Inverter-Interfaced Distributed Generators Energies equivalent model of a low-voltage (LV) system inverter-based distributed generators (DGs) power loss volt/var optimization (VVO) |
author_facet |
Mu-Gu Jeong Young-Jin Kim Seung-Il Moon Pyeong-Ik Hwang |
author_sort |
Mu-Gu Jeong |
title |
Optimal Voltage Control Using an Equivalent Model of a Low-Voltage Network Accommodating Inverter-Interfaced Distributed Generators |
title_short |
Optimal Voltage Control Using an Equivalent Model of a Low-Voltage Network Accommodating Inverter-Interfaced Distributed Generators |
title_full |
Optimal Voltage Control Using an Equivalent Model of a Low-Voltage Network Accommodating Inverter-Interfaced Distributed Generators |
title_fullStr |
Optimal Voltage Control Using an Equivalent Model of a Low-Voltage Network Accommodating Inverter-Interfaced Distributed Generators |
title_full_unstemmed |
Optimal Voltage Control Using an Equivalent Model of a Low-Voltage Network Accommodating Inverter-Interfaced Distributed Generators |
title_sort |
optimal voltage control using an equivalent model of a low-voltage network accommodating inverter-interfaced distributed generators |
publisher |
MDPI AG |
series |
Energies |
issn |
1996-1073 |
publishDate |
2017-08-01 |
description |
The penetration of inverter-based distributed generators (DGs), which can control their reactive power outputs, has increased for low-voltage (LV) systems. The power outputs of DGs affect the voltage and power flow of both LV and medium-voltage (MV) systems that are connected to the LV system. Therefore, the effects of DGs should be considered in the volt/var optimization (VVO) problem of LV and MV systems. However, it is inefficient to utilize a detailed LV system model in the VVO problem because the size of the VVO problem is increased owing to the detailed LV system models. Therefore, in order to formulate and solve the VVO problem in an efficient way, in this paper, a new equivalent model for an LV system including inverter-based DGs is proposed. The proposed model is developed based on an analytical approach rather than a heuristic-fitting one, and it therefore enables the VVO problem to be solved using a deterministic algorithm (e.g., interior point method). In addition, a method to utilize the proposed model for the VVO problem is presented. In the case study, the results verify that the computational burden to solve the VVO problem is significantly reduced without loss of accuracy by the proposed model. |
topic |
equivalent model of a low-voltage (LV) system inverter-based distributed generators (DGs) power loss volt/var optimization (VVO) |
url |
https://www.mdpi.com/1996-1073/10/8/1180 |
work_keys_str_mv |
AT mugujeong optimalvoltagecontrolusinganequivalentmodelofalowvoltagenetworkaccommodatinginverterinterfaceddistributedgenerators AT youngjinkim optimalvoltagecontrolusinganequivalentmodelofalowvoltagenetworkaccommodatinginverterinterfaceddistributedgenerators AT seungilmoon optimalvoltagecontrolusinganequivalentmodelofalowvoltagenetworkaccommodatinginverterinterfaceddistributedgenerators AT pyeongikhwang optimalvoltagecontrolusinganequivalentmodelofalowvoltagenetworkaccommodatinginverterinterfaceddistributedgenerators |
_version_ |
1725408991093194752 |