scholarly journals Solar Power Plant Storage System

2021 ◽  
Vol 26 (2) ◽  
Author(s):  
Mykola Oleksiiovych Lukianov ◽  
Ievhen Volodymyrovych Verbytskyi ◽  
Andii Blinov
Keyword(s):  
Energy Storage ◽  
Electricity Generation ◽  
Storage System ◽  
Technical Requirements ◽  
Discharge Device ◽  
Battery Capacity ◽  
Forecast Interval ◽  
Power Stabilization ◽  
Control Principle ◽  
Charge Discharge

The article analyzes changes in the legislation on the rules of electricity generation from renewable sources and the introduction of penalties for imbalances, which encourages producers to improve the forecast of electricity generation and modernization of existing power plants by installing energy storage systems. Possible connection points and charge/discharge device (CDD) converter topologies for an energy storage system are analyzed and the converter that meets technical requirements of the system are selected. As a result, the connection from the direct current side has a number of advantages: simpler CDD structure and control principle, in comparison with alternating current; no galvanic separation between input and output. Converter analysis showed, that due to a high operating voltage, usage of resonant topologies is undesirable and the absence of galvanic separation makes bridge converter usage impractical. Therefore, to solve this problem, a bidirectional converter without galvanic separation with hard switching is proposed. To reduce the level of dynamic and static losses, it is advisable to use a modular topology converter with alternating phases. The operating modes of such a converter at a given error of the weather forecast are analyzed. To improve quality of the generated electricity, it is expedient to use a power stabilization mode. Due to the higher values of charge/discharge currents, as well as higher energy density compared to acid-lead, a lithium-ion battery was chosen. According to the selected operation mode, its minimum capacity was calculated. When using a minimum battery capacity, due to the difference between the maximum discharge and charge current of the battery, a mode of partial power stabilization is possible. This mode is used only when the forecast error is more than 52% in the charging mode. A charge/discharge device were designed for a 50 kW SMA Sunny Tripower CORE1 inverter and 20*315W LP156*156-M-60 solar panels connected in series. The control principle for such CDD is described. Control algorithm can be divided into four stages: obtaining the predicted solar radiation power in the forecast interval; predicted illumination power conversion into electric power;  predicted power calculation and the amount of energy that will be generated  and transferred by the solar station to the regulator in the forecast interval; power setpoint stabilization on the forecast interval based on the proportional-integral (PI) control law. To verify the obtained theoretical relations, converter parameters with a typical input data were calculated. Model of the converter was created in the MATLAB® Simulink® environment and its operability was checked.

Comparison of Different Energy Storage Systems for a Small Airport Facility

2018 ◽  
Author(s):  
Shahin Shafiee ◽  
Mary Helen McCay
Keyword(s):  
Renewable Energy ◽  
Energy Storage ◽  
Rural Areas ◽  
Wind Farm ◽  
Renewable Energy Sources ◽  
Storage System ◽  
Energy Utilization ◽  
Storage Unit ◽  
Power Requirement ◽  
Technical Requirements

Airports, one of the important transportation components in this modern age, are under continuous improvement especially in regard to energy sustainability. While most work is concentrated on large airports, smaller airports which are mostly scattered around rural areas seem to be better opportunities for renewable energy utilization. However, while renewable energy has come into use at airports over the past decade, it has been at a slow pace and has not included storage. A reliable storage system can significantly increase the power reliability of a small airport and make a renewable energy system viable. Acquiring the technical requirements of a facility based on its characteristics enables the designer to evaluate the power source options and develop an efficient storage system. The current paper analytically develops a framework to design and integrate an energy storage method for a renewable system into a small airport facility. The framework details include methods for energy storage which are environmentally acceptable in combination with renewable energy sources to produce electrical power for the on-site facilities. The technical analysis which leads to the sizing of the storage unit initiates with categorizing different methods for energy storage and their applicability to an airport facility for off-grid and on-grid modes. Based on the results and conclusions from the first step, the search is narrowed down to mediums for electricity storage for a wind farm or solar power plant. In such a case, the main applications of the storage unit could be either to supply power to the facility during the transition time from the renewable source to the main grid or to regulate the power frequency of the generation unit. Capacitors and batteries were selected as the two options for the given power requirement of the facility. Considering the wide variety of available technologies and lower costs, the appropriate storage system is proposed for both long term and short term applications. A table is presented to compare available battery technologies and their respective storage capacities.

Addressing Technology Uncertainties in Battery Energy Storage Sizing Procedures

2017 ◽  
Vol 18 (2) ◽  
Author(s):  
Guido Carpinelli ◽  
Fabio Mottola ◽  
Daniela Proto
Keyword(s):  
Energy Storage ◽  
Storage System ◽  
Life Time ◽  
Energy Storage System ◽  
Point Of View ◽  
Time Duration ◽  
Battery Energy Storage ◽  
Unit Costs ◽  
Battery Capacity ◽  
Battery Energy

Abstract This paper analyzes the influence of technology uncertainties on the sizing of battery systems. The sizing is based on the minimization of the costs incurred by the end customer and is performed considering demand response applications in the frame of time of use tariffs. The randomness of i) battery round trip efficiency, ii) life time duration, iii) unit costs related to battery capacity, power conversion system, operation and maintenance and replacement is taken into account in order to identify the most convenient solution from an economic and technical point of view. Based on the load requests of actual industrial and residential loads, numerical applications have been performed. The results provided useful information regarding the influence uncertainties have in the choice of a battery energy storage system.

An Optimum Sizing Methodology for Combined Photovoltaic-Energy Storage Electricity Generation Configurations

2009 ◽  
Vol 131 (2) ◽  
Author(s):  
J. K. Kaldellis ◽  
D. Zafirakis ◽  
K. Kavadias ◽  
E. Kondili
Keyword(s):  
Energy Storage ◽  
Electricity Generation ◽  
Renewable Energy Sources ◽  
Storage System ◽  
Thermal Power ◽  
Energy Storage System ◽  
Local Network ◽  
Electrical Networks ◽  
Power Stations ◽  
Generation Cost

The electrification of autonomous electrical networks is in most cases described by low quality of electricity available at very high production cost. Furthermore, autonomous electrical networks are subject to strict constraints posing serious limitations on the absorption of renewable energy sources (RES)-based electricity generation. To bypass these constraints and also to secure a more sustainable electricity supply status, the concept of combining photovoltaic (PV) power stations and energy storage systems comprises a promising solution for small scaled autonomous electrical networks, increasing the reliability of the local network as well. In this context, the present study is devoted in developing a complete methodology, able to define the size of an autonomous electricity generation system, based on the maximum available solar potential exploitation at minimum electricity generation cost. In addition special emphasis is given in order to select the most cost-efficient energy storage configuration available. According to the calculation results obtained, one may clearly state that an optimum sizing combination of a PV generator along with an appropriate energy storage system may significantly contribute on reducing the electricity generation cost in several island electrical systems, providing also abundant and high quality electricity without the environmental and macro-economic impacts of the oil-based thermal power stations.

scholarly journals Electricity Generation Using a Hybridized Zeolite Adsorption Heat Pump and Heat Engine

2020 ◽  
Vol 12 (4) ◽  
pp. 75
Author(s):  
Linus Kweku Labik ◽  
Bright Kwakye-Awuah ◽  
Baah Sefa-Ntiri ◽  
Eric Kwabena Kyeh Abavare ◽  
Isaac Nkrumah ◽  
...  
Keyword(s):  
Energy Storage ◽  
Heat Pump ◽  
Electricity Generation ◽  
Storage System ◽  
Heat Engine ◽  
Adsorbed Water ◽  
Energy Storage System ◽  
Adsorption Heat ◽  
Average Temperature ◽  
Adsorption Heat Pump

The use of adsorption in Thermal Energy Storage has gained considerable research interest of late. Some applications have focused on the use of TES for transformation of low temperature heat in applications such as cooling and heating. Zeolite and water have been studied as suitable materials. Their characteristics as environmentally friendly materials and high affinity makes them conspicuous. The unique properties of zeolites to hold adsorbed water/heat with very minimal loss is also significant. With the aid of a dynamo, a Stirling engine as heat engine and the adsorption energy storage system serving as heat pump was used to generate electricity. The relationship between electricity generation and temperature was investigated. The obtained average temperature and pressure of the zeolite - water adsorption heat pump was also compared with the basic adsorption cycle.

An Energy-Saving Scheme of Motor Drive Systems Based on Ultracapacitors

2014 ◽  
Vol 986-987 ◽  
pp. 1043-1047
Author(s):  
Qun Tao An ◽  
Li Sun ◽  
Ming Hang Duan ◽  
Rui Bo Liu
Keyword(s):  
Energy Storage ◽  
Energy Saving ◽  
Storage System ◽  
Energy Storage System ◽  
Drive System ◽  
Motor Drive ◽  
Pwm Rectifier ◽  
Technical Requirements ◽  
Drive Systems ◽  
Motor Drive System

In order to prevent DC link voltage pump during braking, a paralleled release circuit composed of chopper and resistor is often employed. As a result of energy waste on the resistor, the efficiency of the motor drive system is low in the case of frequent braking. To improve the efficiency, an energy-saving scheme of motor drive systems based on ultracapacitors is proposed in this paper. An energy storage system (ESS) paralleled with the DC link of the motor drive is adopted in the scheme, which is composed of a bidirectional DC-DC converter and ultracapacitors. The ESS can realize recycling of the braking energy. Compared with PWM rectifier, this scheme can avoid various technical requirements for grid-connected inverters.

scholarly journals Optimization of Microgrid Battery Capacity using PSO with Considering Islanding Operation

2020 ◽  
Vol 2 (1) ◽  
Author(s):  
Ayu Sintianingrum, Khairudin, Lukmanul Hakim
Keyword(s):  
Energy Storage ◽  
Storage System ◽  
Pso Algorithm ◽  
Energy Storage System ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Battery Capacity ◽  
Effective System ◽  
Islanding Operation ◽  
Storage Technologies

Electrical is used for various activities in all sectors. Rapid increase of electricity demand recently, makes it necessary to have an even more efficient method for generating electricity. Renewable energy and the microgrid provides an integrated and alternative solution for electricity generation. In microgrid systems, energy storage devices are one of important aspects. Batteries are one kind of the energy storage technologies widely used in power system and hence, their suitable capacity must be determined in order to develop an effective system installation. In this research, sizing optimization of battery capacity is modeled as a minimization of microgrid battery capacity using the Particle Swarm Optimization/PSO algorithm with considering islanding operation of the system for effective battery installation. Results show that optimal battery capacity can be obtained and the developed computational model gives satisfactory results for the system under study.   Keywords: Battery, microgrid, energy storage system, PSO algorithm

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