Improvement of the Three-Phase Multifunctional Converter of the Photoelectric System with a Storage Battery for a Local Object with Connection to a Grid

Shavolkin, Olexander; Shvedchykova, Iryna

doi:10.1109/paep49887.2020.9240789

Cited by 8 publications

(19 citation statements)

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“…With a power consumption of LO in excess of 10 kW, it is advisable to use three-phase multifunctional inverters while maintaining a power factor close to 1 at the point of common coupling (PCC) to the grid [5][6][7][8][9][10][11][12]. This allows to unload the grid from reactive power and ensures the symmetry of loading the phases of the grid at an unbalanced load [9][10][11][12]. A previous study [13] presented a three-phase PVS with an SB with four converters with a common link of direct current (DC).…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

“…The "multiconverter" provided a given active power with the proper quality of electricity, PV operation with tracking the maximum power point (MPPT), and extended battery life with hybrid storage. In [10,11], the structure of the control system of a multifunctional inverter of a PVS with an SB with voltage stabilization in the DC link with three VCs was considered. The VC controls the currents of the SB and PV, as well as current in the PCC.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

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Use of Hybrid Photovoltaic Systems with a Storage Battery for the Remote Objects of Railway Transport Infrastructure

et al. 2022

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The use of a grid-tied photovoltaic system with a storage battery to increase the power of objects of railway transport infrastructure above the limit on consumption from the grid with the possibility of energy saving is considered. The methods of analysis of energy processes in photovoltaic systems with a storage battery are used. They are added via the processing of archival data of power generation of a photovoltaic battery and computer modeling results. A technique of system parameter calculation to increase the power according to the given load schedule of the object at constant and maximum possible degree of power increasing is developed. The values of the average monthly generation of a photovoltaic battery at the location point of the object based on archival data are used. The principle of the control of power, consumed from the grid, according to the given values of the added and total load is developed. Using the basic schedule of added load power in connection with the graph of photovoltaic battery generation allows reducing the installed power of the storage battery. The additional reduction in the installed power of the photovoltaic and storage batteries is possible at the corresponding choice of the degree of power load increasing. The joint formation of current schedules with reference to the added power value and state of charge of the battery according to the short-term forecast of the generation of a photovoltaic battery is proposed. The value of added power at certain intervals of time is set according to the graph of actual generation of the photovoltaic battery, which contributes to the maximum use of its energy. With the average monthly generation of a photovoltaic battery in the spring–autumn period, the discharge of the battery during the hours of the morning load peak is not used. This reduces the number of deep discharge cycles and extends the battery life. The description of energy processes in steady-state conditions for the daily cycle of system functioning is formalized. On this basis, a mathematical model is developed in MATLAB with an estimation of the costs of electricity consumed from the grid. When modeling, archival data are used for days when the generation of a photovoltaic battery over time intervals is close to average monthly values. This makes it possible to evaluate the effectiveness of system management under conditions close to real during the year.

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Section: Literature Review and Problem Statementmentioning

confidence: 99%

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Use of Hybrid Photovoltaic Systems with a Storage Battery for the Remote Objects of Railway Transport Infrastructure

et al. 2022

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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%

“…VS is used to avoid a pause when one connects to DG when the voltage is restored (K1 is first closed, and, after the VSI u C voltage is synchronized with the network voltage u g , the triac is activated). To measure the short-circuit current PV, the QS switch is used [18]. Voltage and current sensors are not shown in Fig.…”

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

confidence: 99%

“…The DC/DC1 control system (CSС PV ) is executed with an I PV current relay. In this case, control over PV generation [18] is carried out by the МРРТ controller or VC2 (Table 1). VC2 maintains the energy balance in the system by adjusting I PV and P PV in accordance with energy consumption by the load and SB.…”

Section: The Structure Of a Photovoltaic System Control Systemmentioning

confidence: 99%

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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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Simulation of a direct torque control system in the presence of winding asymmetry in induction motor

et al. 2023

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The operation of a direct torque control (DTC) system for induction motors with the possible presence of unbalanced modes in the motor windings is studied. It is shown that in the presence of asymmetric modes in the motor windings, the classical DTC algorithm becomes unstable. It is proposed to improve the DTC by taking into account the unbalance of the active resistances of the motor stator windings when determining the DTC parameters. This will make it possible to study electrodynamic processes in DTC with the possible presence of asymmetric modes in the windings of induction motor.

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Improvement of the Three-Phase Multifunctional Converter of the Photoelectric System with a Storage Battery for a Local Object with Connection to a Grid

Cited by 8 publications

References 8 publications

Use of Hybrid Photovoltaic Systems with a Storage Battery for the Remote Objects of Railway Transport Infrastructure

Use of Hybrid Photovoltaic Systems with a Storage Battery 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

Simulation of a direct torque control system in the presence of winding asymmetry in induction motor

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