scholarly journals Management of power consumption in a photovoltaic system with a storage battery connected to the network with multi-zone electricity pricing to supply the local facility own needs

2021 ◽  
pp. 36-42
Author(s):  
A. A. Shavelkin ◽  
J. Gerlici ◽  
I. O. Shvedchykova ◽  
K. Kravchenko ◽  
H. V. Kruhliak
Keyword(s):  
Power Consumption ◽  
Simulation Model ◽  
Photovoltaic System ◽  
Storage Battery ◽  
Electricity Pricing ◽  
Modeling And Analysis ◽  
Local Facility ◽  
Load Schedule ◽  
Battery Energy ◽  
Energy Processes

Purpose. Improving the principles of management of photovoltaic system with storage battery and with autonomous functioning during daylight hours for a local object, connected to the grid with multi-zone payment when excluding the generation of energy into the grid. Methodology. Modeling and analysis of energy processes in the photovoltaic system was performed using the Matlab software package. The simulation model of energy processes is based on calculated expressions taking into account the characteristics of the battery. Operability of the proposed solutions are confirmed on an experimental setup based on a standard hybrid inverter. Results. It’s shown, that due to the battery energy during the most loaded peak hours and part of the daytime the system operates autonomously and does not depend on possible violations of the quality of electricity in the grid. Scenarios of the recommended load schedule are proposed in accordance with the ratio of the predicted value of the daily energy generation of the photovoltaic battery to its possible maximum value. A simulation model of energy processes in the system with the correction of the recommended load value was developed. Originality. A method of the recommended load calculation with current correction for the actual generation and degree of battery charge is proposed, which allows taking into account differences the actual generation of the photovoltaic battery from its predicted value and the actual load from the recommended one. Practical value. The obtained solutions are the basis for the design of new and modernization of existing photovoltaic systems of local objects using software and hardware complexes for power consumption management.

scholarly journals ВИЗНАЧЕННЯ ПАРАМЕТРІВ ФОТОЕЛЕКТРИЧНОЇ СИСТЕМИ З АКУМУЛЯТОРОМ ДЛЯ ПОТРЕБ ЛОКАЛЬНОГО ОБ’ЄКТУ

2022 ◽  
pp. 41-50
Author(s):  
OLEXANDER SHAVOLKIN ◽  
RUSLAN MARCHENKO ◽  
YEVHEN STANOVSKYI ◽  
MYKOLA PIDHAINYI ◽  
HENNADII KRUHLIAK
Keyword(s):  
Archival Data ◽  
Time Intervals ◽  
Average Value ◽  
Cost Of Energy ◽  
Photoelectric System ◽  
Local Facility ◽  
Load Schedule ◽  
The Cost ◽  
Energy Processes ◽  
Generation Power

Purpose. Improving the methodology for determining the parameters of a photoelectric system with a battery for the needs of a local object using archival data of the generation of a photoelectric battery with planning the cost of energy consumption from the network for all seasons of the year.Methodology. Using an archive of data on the power generation of a photoelectric battery and analysis of energy processes in a photoelectric system with a battery using computer simulation.Findings. Calculated according to the archive data for five years, the average monthly values of photoelectric battery generation power for time intervals during the day determined according to tariff zones. Dependencies to determine the recommended average value load power of a local object at time intervals.Originality. It is proposed to determine the base schedule of the local facility and the parameters of the photoelectric system based on the average monthly values of photoelectric battery generation in the transition seasons – October, March and the expected cost of energy consumed from the grid during the year. The recalculation of the base value of power during the year is substantiated taking into account the duration of daylight. A method for determining the recommended load schedule of a local object with the formation of the battery charge according to the average monthly value of the photoelectric battery generation power at time intervals during the day, which are determined by archival data for the object location.Practical value. The obtained solutions are the basis for designing photoelectric systems with a battery to meet the needs of local objects.

scholarly journals Analysis on Operation Modes of Residential BESS with Balcony-PV for Apartment Houses in Korea

2020 ◽  
Vol 13 (1) ◽  
pp. 311
Author(s):  
Jiyoung Eum ◽  
Yongki Kim
Keyword(s):  
Renewable Energy ◽  
Power Consumption ◽  
Operation Mode ◽  
Optimal Operation ◽  
Photovoltaic System ◽  
Renewable Energy Systems ◽  
Operation Modes ◽  
Battery Energy Storage Systems ◽  
Battery Energy ◽  
Near Future

The integration of battery energy storage systems (BESS) with renewable energy is a potential solution to address the disadvantages of renewable energy systems, which is irregular and intermittent power. In particular, residential BESS is advancing in numerous countries. The residential BESS connected to the photovoltaic system (PV) can store the PV power in the battery through charging, and supply the PV power, which was stored in the battery, to the load through discharging when there is no PV power. Therefore, the utilization of residential BESS with PV reduces the daily electric power consumption and the electricity bills that households have to charge. However, it is understood that there is no case of installing and using residential BESS in Korea yet. Most residential houses in Korea are apartment houses, and thus residential BESS can be used with balcony PV. This paper presents operation modes of residential BESS with balcony PV for apartment houses. The BESS capacity was estimated by considering the balcony PV capacity, which can be installed in households, and power consumption. The applicability of the residential BESS was analyzed through performance and economics evaluation under current and various conditions. The operation modes of BESS were divided into four types according to PV power supply priority and battery charging source, and a test took place in a demonstration house. The risk of fully discharging the battery has been discovered when PV power is first charged to the battery or when only PV power is charged with the battery. As a result, preferential charging of the battery with PV power and then with PV and grid power was found to be the most optimal operation mode. In addition, additional functions were proposed for residential BESS in apartment households. The results will contribute to effective application of residential BESS with balcony PV in the near future.

scholarly journals Simulation of a hybrid photovoltaic system with a storage battery for a local object in the case of energy management using forecast.

2021 ◽  
Vol 24 (1) ◽  
pp. 6-13
Author(s):  
ШАВЬОЛКІН О.О. ◽  
◽  
ПІДГАЙНИЙ М.О. ◽  
СТАНОВСЬКИЙ Є.Ю. ◽  
◽  
...  
Keyword(s):  
Energy Management ◽  
Weather Conditions ◽  
Photovoltaic System ◽  
Storage Battery ◽  
Battery Charge ◽  
Sufficient Energy ◽  
Reducing Costs ◽  
Storage Batteries ◽  
The Cost ◽  
Energy Processes

The issues of increasing the efficiency of a hybrid photovoltaic system with a storage battery for a local object by improving energy management by forecasting with simulation of energy processes in the system are considered. It is proposed to combine the functions of ensuring the auxiliary needs of the object with the planned generation of energy to the grid for the day ahead during peak hours. In the absence of generation to the grid in the case of sufficient energy from the photovoltaic and storage batteries, the system operates in an autonomous mode. To reduce energy consumption from the network, it is proposed to switch to work with the grid with predicting the degree of battery charge and correcting the load power when the voltage decreases within acceptable limits. To study the efficiency of energy management according to the forecast, simulation modeling of energy processes in the daily cycle was used. The developed model with a block for predicting the degree of battery charge allows you to investigate the operation of the system under various weather conditions with an estimate of the cost of paying for electricity from the grid at multi- zone billing. In this case, the archived data of the forecast of the generation of a photovoltaic battery from open web resources were used. The simulation results confirm the efficiency of the proposed solutions and the possibility of reducing costs even in the absence of generation to the grid. The solutions obtained are the basis for the design of software control complexes for photovoltaic systems with batteries with improved energy efficiency.

Grid-tied photovoltaic system with a storage battery to supply the local object own needs with multi-zone payment

2020 ◽  
Vol 23 (2) ◽  
pp. 6-15
Author(s):  
О. SHAVELKIN ◽  
◽  
І. SHVEDCHYKOVA ◽  
Keyword(s):  
Control System ◽  
Input Voltage ◽  
Photovoltaic System ◽  
Storage Battery ◽  
Active Rectifier ◽  
Autonomous Operation ◽  
Autonomous Mode ◽  
Storage Batteries ◽  
Energy Processes

The principles for the implementation of control and redistribution of energy in a photovoltaic system with a storage battery for a local object connected to a grid with multi-zone tariffication have been improved, with the exclusion of generating electricity to the grid. There is a synthesis of the structure of the control system and the control algorithm based on the analysis of processes in electrical circuits using computer modeling to substantiate the system parameters and check the proposed solutions. The possibility of ensuring the normal functioning of a local object for a possible violation of the quality of electricity during the most loaded peak hours and most of the daytime during the autonomous operation of the system is shown. Relationships are obtained for determining the values of the input voltage of the inverter, the inductance of the reactor and the PWM frequency when the inverter is operating in the active rectifier mode with the possibility of reducing the PWM frequency in the autonomous mode with a decrease in energy losses in the switches and an increase in efficiency. The structure of the control system has been improved to ensure that the battery operates in the active zone of charging characteristics in an autonomous mode and switching the load to the grid when the inverter charges the battery in the active rectifier mode. The simulation model of energy processes in the system has been improved, taking into account the charging and discharging characteristics of the battery. It has been established that the lowest costs for electricity consumed from the network are achieved at maximum loads during peak hours, the ratio of the capacities of photoelectric and storage batteries is justified. The performance of the proposed solutions is confirmed by modeling in Matlab and on an experimental setup based on a standard hybrid inverter. The solutions obtained are the basis for the design of new and modernization of existing photoelectric systems of local objects, including the use of software and hardware control systems.

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