Voltage regulation strategy of AC distribution network based on distributed PV grid-connected inverter
The distribution network connected with photovoltaic (PV) power generation may show high voltage under strong light and low voltage under weak light. The influence of distributed PV generation on the grid voltage profile is analysed first, and then, the sensitivity of the grid voltage to the PV inve...
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Online Access: | https://digital-library.theiet.org/content/journals/10.1049/joe.2018.8680 |
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doaj-d96f90ae7d9047cca3ad15bab31363ab2021-04-02T12:59:37ZengWileyThe Journal of Engineering2051-33052019-04-0110.1049/joe.2018.8680JOE.2018.8680Voltage regulation strategy of AC distribution network based on distributed PV grid-connected inverterXiangqian Tong0Minghang Zhong1Xiaoqing Zhang2Jun Deng3Zhihua Zhang4Xi'an University of TechnologyXi'an University of TechnologyState Grid Shaanxi Electric Power Research InstituteState Grid Shaanxi Electric Power Research InstituteXi'an University of TechnologyThe distribution network connected with photovoltaic (PV) power generation may show high voltage under strong light and low voltage under weak light. The influence of distributed PV generation on the grid voltage profile is analysed first, and then, the sensitivity of the grid voltage to the PV inverter output power is deduced. Aiming at overhead line distribution network, the local voltage regulation strategy based on the power control of the grid-connected PV inverter is proposed. The PV inverter works under the maximum power point tracking (MPPT) mode with unity power factor when the grid voltage is at the normal level. However, when the voltage is higher than its upper limit, the grid-connected PV inverter will be co-ordinately controlled to output limited active power and necessary reactive power to restrain the line voltage. Also, when the voltage is below than the lower limit, only the reactive power of the grid-connected PV inverter was controlled to sustain the line voltage, and the reactive power is no more than the residual capacity of the grid-connected PV inverter operated in the MPPT mode. Simulation and results show that the voltage quality of the distribution network with PV generation is improved by using the voltage regulation strategy presented in this study.https://digital-library.theiet.org/content/journals/10.1049/joe.2018.8680distributed power generationinvertorspower gridspower generation controlphotovoltaic power systemsvoltage controlmaximum power point trackerspower factorpower distribution controlreactive power controlAC distribution networkdistributed PV grid-connected inverterphotovoltaic power generationdistributed PV generationgrid voltage profilePV inverter output poweroverhead line distribution networklocal voltage regulation strategygrid-connected PV invertermaximum power point tracking modeline voltagereactive powervoltage qualitypower controlMPPT modeunity power factor |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Xiangqian Tong Minghang Zhong Xiaoqing Zhang Jun Deng Zhihua Zhang |
spellingShingle |
Xiangqian Tong Minghang Zhong Xiaoqing Zhang Jun Deng Zhihua Zhang Voltage regulation strategy of AC distribution network based on distributed PV grid-connected inverter The Journal of Engineering distributed power generation invertors power grids power generation control photovoltaic power systems voltage control maximum power point trackers power factor power distribution control reactive power control AC distribution network distributed PV grid-connected inverter photovoltaic power generation distributed PV generation grid voltage profile PV inverter output power overhead line distribution network local voltage regulation strategy grid-connected PV inverter maximum power point tracking mode line voltage reactive power voltage quality power control MPPT mode unity power factor |
author_facet |
Xiangqian Tong Minghang Zhong Xiaoqing Zhang Jun Deng Zhihua Zhang |
author_sort |
Xiangqian Tong |
title |
Voltage regulation strategy of AC distribution network based on distributed PV grid-connected inverter |
title_short |
Voltage regulation strategy of AC distribution network based on distributed PV grid-connected inverter |
title_full |
Voltage regulation strategy of AC distribution network based on distributed PV grid-connected inverter |
title_fullStr |
Voltage regulation strategy of AC distribution network based on distributed PV grid-connected inverter |
title_full_unstemmed |
Voltage regulation strategy of AC distribution network based on distributed PV grid-connected inverter |
title_sort |
voltage regulation strategy of ac distribution network based on distributed pv grid-connected inverter |
publisher |
Wiley |
series |
The Journal of Engineering |
issn |
2051-3305 |
publishDate |
2019-04-01 |
description |
The distribution network connected with photovoltaic (PV) power generation may show high voltage under strong light and low voltage under weak light. The influence of distributed PV generation on the grid voltage profile is analysed first, and then, the sensitivity of the grid voltage to the PV inverter output power is deduced. Aiming at overhead line distribution network, the local voltage regulation strategy based on the power control of the grid-connected PV inverter is proposed. The PV inverter works under the maximum power point tracking (MPPT) mode with unity power factor when the grid voltage is at the normal level. However, when the voltage is higher than its upper limit, the grid-connected PV inverter will be co-ordinately controlled to output limited active power and necessary reactive power to restrain the line voltage. Also, when the voltage is below than the lower limit, only the reactive power of the grid-connected PV inverter was controlled to sustain the line voltage, and the reactive power is no more than the residual capacity of the grid-connected PV inverter operated in the MPPT mode. Simulation and results show that the voltage quality of the distribution network with PV generation is improved by using the voltage regulation strategy presented in this study. |
topic |
distributed power generation invertors power grids power generation control photovoltaic power systems voltage control maximum power point trackers power factor power distribution control reactive power control AC distribution network distributed PV grid-connected inverter photovoltaic power generation distributed PV generation grid voltage profile PV inverter output power overhead line distribution network local voltage regulation strategy grid-connected PV inverter maximum power point tracking mode line voltage reactive power voltage quality power control MPPT mode unity power factor |
url |
https://digital-library.theiet.org/content/journals/10.1049/joe.2018.8680 |
work_keys_str_mv |
AT xiangqiantong voltageregulationstrategyofacdistributionnetworkbasedondistributedpvgridconnectedinverter AT minghangzhong voltageregulationstrategyofacdistributionnetworkbasedondistributedpvgridconnectedinverter AT xiaoqingzhang voltageregulationstrategyofacdistributionnetworkbasedondistributedpvgridconnectedinverter AT jundeng voltageregulationstrategyofacdistributionnetworkbasedondistributedpvgridconnectedinverter AT zhihuazhang voltageregulationstrategyofacdistributionnetworkbasedondistributedpvgridconnectedinverter |
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1721566961185325056 |