Three-phase Grid Inverter for Combined Electric Power System with a Photovoltaic Solar Battery

Shavolkin, Olexander; Shvedchykova, Iryna; Kravchenko, Olga

doi:10.1109/mees.2019.8896661

Cited by 9 publications

(7 citation statements)

References 7 publications

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“…In a case with an unbalanced load of LO, the use of a four-wire circuit for a three-phase multifunctional inverter was considered in [11]. Furthermore, a solution that connected the neutral output of the grid with the middle pin of the DC link of an inverter was presented in [12]. A similar solution with a few PVs connected to the inverter was shown in [13].…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Improvement of the Grid-Tied Solar-Wind System with a Storage Battery for the Self-Consumption of a Local Object

et al. 2022

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This work aimed to improve how the equipment of a grid-tied solar-wind system used the installed power of the storage battery while reducing the cost of electricity consumed by a local object from the grid. A method for calculating the parameters for a given load schedule is proposed, along with the value of the reduction in electricity consumption. Values for the power generation of a wind generator and photovoltaic battery are based on archival data. The possible power ratio of the wind generator and the photovoltaic battery is 1:8.33. The formation of the state of charge of the battery involves: a calculation of its value for the morning peak according to the forecast for the next day; adjustable discharge in the evening with full or partial compensation for the load consumption according to the forecast for the next day; a night charge with a given current value. At a one-tariff plan, one battery discharge cycle per day is used. A night charge from the grid is not used. With a two-tariff plan and the use of a night battery charge from the grid, one discharge cycle is used in the spring-summer-autumn period. The simulation confirms the possibility of reducing electricity costs by 2.9 times in winter, which corresponds to the set value, alongside a complete elimination of costs in summer.

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Section: Literature Review and Problem Statementmentioning

confidence: 99%

Improvement of the Grid-Tied Solar-Wind System with a Storage Battery for the Self-Consumption of a Local Object

et al. 2022

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“…To implement a PV-WG system with the battery, a variant with a common grid inverter is usually considered [2,[4][5][6]. Wide opportunities to improve the performance of the system are provided by the use of multifunctional grid inverters [9][10][11][12][13][14][15]. In this case, it provides a power factor close to 1 in a point of common coupling (PCC) to the AC grid, and the three-phase version [12][13][14][15] also provides the equalization of consumption by the phases in the grid.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Solar–Wind System for the Remote Objects of Railway Transport Infrastructure

et al. 2022

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The article deals with adding the power of a local object to a solar–wind system when consuming electricity from the grid within the power limit. The parameter’s calculation technique for the different values of degree of power increase was considered. The load schedule, the electricity consumption, use of installed power, boundary conditions of generation, and ensuring energy balance were taken into account. Furthermore, data from the renewable source’s generation archive for the location of the object were used. The control of the power consumed by the object was carried out on the taken values of added and total load power with binding to photovoltaic generation. The added power reference on some time intervals was carried out according to the actual renewable generation power value. This increases the degree of use of the battery capacity and energy from renewable sources. The reference of the added power with the state of battery charge formation was carried out according to the forecast. One cycle of deep battery discharge at the evening peak was used to extend the battery life. For the accepted conditions with the average monthly values of renewable energy sources generation with an increase in power by 1.6 times, there was a decrease in electricity consumption by 1.57–4 times.

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“…The structure of PVS with SB, using an example of a single-phase implementation variant (Fig. 1), includes a grid inverter (VSI) with an output LCR filter [17,18], a photovoltaic battery (PV) and a rechargeable battery (SB), LF load, distribution grid (DG). PV connects to the VSI input via the DC/DC1 booster; SBvia DC/DC2 (charge controller) with two-way conductivity.…”

Section: Improving the Mechanism For Managing The Generation And Redistribution Of Energy In A Photovoltaic System Using Predictive Contrmentioning

confidence: 99%

“…without compensating for a static error caused by the perturbing effect u g [17]. To reduce energy loss to switch the inverter transistors under an autonomous mode, the f M value can be reduced by recalculating the value of k. We assume the power of the inverter to be 5.…”

Section: The Structure Of a Photovoltaic System Control Systemmentioning

confidence: 99%

Improved control of energy consumption by a photovoltaic system equipped with a storage device to meet the needs of a local facility

Shavolkin

Shvedchykova

Jasim

2021

EEJET

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+This paper has considered improving the management of energy consumption by a photovoltaic system with a storage device for a local object connected to the network. The aim of the study is to reduce expenditures when paying for electricity consumed from the network, when loading an object, independent of the time of year, and to eliminate energy generation to the grid. An energy generation control algorithm has been improved whereby the state of battery charge during the day is based on a forecast. That could reduce electricity consumption at night with better utilization of rechargeable battery and photovoltaic battery power during the day. It is proposed to use autonomous operation by disconnecting from the network during peak tariff hours and during the day with enough energy generation by a photovoltaic battery. This would ensure the normal functioning of an object in the event of a possible deterioration in the quality of voltage in the network while reducing the loss of energy in the inverter. Predictive control of the expected battery charge at the next checkpoint (at 0.5 hours or less between control points) has been proposed. A control system structure has been developed whereby a rechargeable battery current is set depending on an operational mode, the tariff zone, and the projected generation by a photovoltaic battery while reducing the modulation frequency under an autonomous mode. In this case, the modes are switched and the structure is changed taking into consideration the state of battery charge. Simulation in the daily cycle has shown the possibility of reducing the cost of electricity consumed from the network by 1.7‒8 times at two or three tariff rates. Simulation of electromagnetic processes in the system confirms acceptable regulation indicators when switching the structure, as well as a decrease in the energy loss in an inverter under an autonomous mode by up to 40 %

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Three-phase Grid Inverter for Combined Electric Power System with a Photovoltaic Solar Battery

Cited by 9 publications

References 7 publications

Improvement of the Grid-Tied Solar-Wind System with a Storage Battery for the Self-Consumption of a Local Object

Improvement of the Grid-Tied Solar-Wind System with a Storage Battery for the Self-Consumption of a Local Object

Solar–Wind System for the Remote Objects of Railway Transport Infrastructure

Improved control of energy consumption by a photovoltaic system equipped with a storage device to meet the needs of a local facility

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