Reactive power control can control voltage within the proper range from the power network side or from the distribution generation （PV （photovoltaic）） side. Reactive power control from the power network side is si...Reactive power control can control voltage within the proper range from the power network side or from the distribution generation （PV （photovoltaic）） side. Reactive power control from the power network side is simpler because little controlled object apparatus, such as STATCOM, is required. However, it is difficult to optimize the individual voltages of residential consumers because few data have been obtained by the power network side as compared with the power generation side. Energy loss at each residence with PV is different due to the difference in the grid-interconnection condition, such as distribution line impedance when the same operating voltage is set at all residences. Therefore, in this paper, the authors propose an advanced reactive power control method for residential PV systems in order to optimally control the voltage at individual residences so as to minimize energy loss fluctuation. The effectiveness of the proposed reactive power control is demonstrated by numerical simulation.展开更多
There is a danger of power generation efficiency decreasing due to voltage increase when clustered residential PV systems are grid-interconnected to a single distribution line. As a countermeasure, installation of the...There is a danger of power generation efficiency decreasing due to voltage increase when clustered residential PV systems are grid-interconnected to a single distribution line. As a countermeasure, installation of the reactive power control of an inverter at each residence has been considered. However, there are not many types of inverters that can operate reactive power control because there are insufficient effects on a low voltage distribution line with low penetration PV with reactive power control. Therefore, it is necessary to consider how to increase generation efficiency with a lower number of inverters. In this paper, four Japanese standard distribution line structures, for example of a residential area on ＂C1＂, where 2,160 residential PV systems are grid-interconnected, are selected. The optimal setting of reactive power control at each residence is computed on the distribution lines with a greedy method.展开更多
Due to the fuel security and environmental concerns of traditional energy resources like fossil fuels,grid operators are tending to use renewable energies as the primary energy supply.This paper presents the study of ...Due to the fuel security and environmental concerns of traditional energy resources like fossil fuels,grid operators are tending to use renewable energies as the primary energy supply.This paper presents the study of designing,simulation and analysis of a 100-kWp on-grid photovoltaic power plant(PV-PP)in north-western Iran.Accurate meteorological data,satellite images and local knowledge from this region have narrowed down the options to three highly irradiated cities of Maragheh,Mahabad and Khalkhal in this region.PVsyst and MATLAB software are used in this paper to obtain the performance results.Environmental effects and carbon-emission savings from the execution of the proposed PV-PP are also available in this paper.The result of this study shows that PV-PP installation in Maragheh will have higher energy output than the two other cities.This study is insightful for the academics and the grid stakeholders in finding optimal spots in north-western Iran to construct a PV-PP.Also,recommendations are available for future studies.展开更多
文摘Reactive power control can control voltage within the proper range from the power network side or from the distribution generation （PV （photovoltaic）） side. Reactive power control from the power network side is simpler because little controlled object apparatus, such as STATCOM, is required. However, it is difficult to optimize the individual voltages of residential consumers because few data have been obtained by the power network side as compared with the power generation side. Energy loss at each residence with PV is different due to the difference in the grid-interconnection condition, such as distribution line impedance when the same operating voltage is set at all residences. Therefore, in this paper, the authors propose an advanced reactive power control method for residential PV systems in order to optimally control the voltage at individual residences so as to minimize energy loss fluctuation. The effectiveness of the proposed reactive power control is demonstrated by numerical simulation.
文摘There is a danger of power generation efficiency decreasing due to voltage increase when clustered residential PV systems are grid-interconnected to a single distribution line. As a countermeasure, installation of the reactive power control of an inverter at each residence has been considered. However, there are not many types of inverters that can operate reactive power control because there are insufficient effects on a low voltage distribution line with low penetration PV with reactive power control. Therefore, it is necessary to consider how to increase generation efficiency with a lower number of inverters. In this paper, four Japanese standard distribution line structures, for example of a residential area on ＂C1＂, where 2,160 residential PV systems are grid-interconnected, are selected. The optimal setting of reactive power control at each residence is computed on the distribution lines with a greedy method.
文摘Due to the fuel security and environmental concerns of traditional energy resources like fossil fuels,grid operators are tending to use renewable energies as the primary energy supply.This paper presents the study of designing,simulation and analysis of a 100-kWp on-grid photovoltaic power plant(PV-PP)in north-western Iran.Accurate meteorological data,satellite images and local knowledge from this region have narrowed down the options to three highly irradiated cities of Maragheh,Mahabad and Khalkhal in this region.PVsyst and MATLAB software are used in this paper to obtain the performance results.Environmental effects and carbon-emission savings from the execution of the proposed PV-PP are also available in this paper.The result of this study shows that PV-PP installation in Maragheh will have higher energy output than the two other cities.This study is insightful for the academics and the grid stakeholders in finding optimal spots in north-western Iran to construct a PV-PP.Also,recommendations are available for future studies.
