scholarly journals Regulatory and legal support for the development of the renewable energy sector in Ukraine

2020 ◽  
Vol 44 (1) ◽  
pp. 31-43
Author(s):  
Iryna Doronina
Keyword(s):  
Renewable Energy ◽  
Alternative Energy ◽  
Storage System ◽  
Peak Load ◽  
Electrical Energy ◽  
Energy Storage System ◽  
Energy Sector ◽  
Energy Development ◽  
Current Status ◽  
Legal Provisions

Energy independence was chosen by Ukraine as one of its development priorities; it covers the reduction of gas consumption and the gas replacement, increase of the energy efficiency in various public life spheres, development of the renewable energy sector. Many published papers of Ukrainian scientists, as well as expert’s reports are dedicated to the challenges in the rollout of the renewable energy sector, however the regulatory and legal support for the development of the aforementioned sector has been considered only fragmentary. Therefore, the issue of the legislative control of the renewable energy sector development under the current European integration conditions requires further research and systematization. Purpose of the article is to determine the major contradictions reflecting the current status of the regulatory and legal control in the renewable energy sector development, to research and propose the corresponding improvement prospects. The article is presenting the regulatory basis assessment and systematization of the Ukrainian renewable energy sector legislation. Insights are given to major contradictions observed in the regulatory and legal provisions of the governmental regulation related to the renewable energy development. Practical proposals are made for the improvement of the legislation related to the provisioning of the Ukrainian United Energy Power System operational safety during the peak-load hours through introduction of the electrical energy storage system. Over the past years, Ukrainian authorities have made several important efforts towards the creation and development of the legislative basis in the renewable energy sector, however this sector is still considered in the context of the alternative energy development, which becomes a prospect for further investigations.  

scholarly journals Battery Life Enhancement in a Hybrid Electrical Energy Storage System Using a Multi-Source Inverter

2019 ◽  
Vol 10 (2) ◽  
pp. 17 ◽  
Author(s):  
Yogesh Mahadik ◽  
K. Vadirajacharya
Keyword(s):  
Electric Vehicles ◽  
Storage System ◽  
Peak Load ◽  
Electrical Energy ◽  
Energy Storage System ◽  
Open Loop ◽  
Battery Life ◽  
Loop Control ◽  
Power Exchange ◽  
Driving Range

This paper introduces a new topology using a multi-source inverter with the intention of reducing the battery current and weight, while enhancing the battery life and increasing the driving range for plug-in electric vehicles, with the combination of a battery and an ultracapacitor (UC) as storage devices. The proposed topology interconnects the UC and battery directly to the three-phase load with a single-stage conversion using an inverter. The battery life is considerably reduced due to excess (peak) current drawn by the load, and these peak load current requirements are met by connecting the ultracapacitor to the battery, controlled through an inverter. Here, the battery is used to cater to the needs of constant profile energy demands, and the UC is used to meet the dynamic peak load profile. This system is highly efficient and cost-effective when compared to a contemporary system with a single power source. Through a comparative analysis, the cost-effectiveness of the proposed energy management system (EMS) is explained in this paper. Energy and power exchange are implemented with an open-loop control strategy using the PSIM simulation environment, and the system is developed with a hardware prototype using different modes of inverter control, which reduces the average battery current to 27% compared to the conventional case. The driving range of electric vehicles is extended using active power exchange between load and the sources. The dynamics of the ultracapacitor gives a quick response, with battery current shared by the ultracapacitor. As a result, the battery current is reduced, thereby enhancing the driving cycle. With the prototype, the results of the proposed topology are validated.

scholarly journals A Comparative Analysis of Peak Load Shaving Strategies for Isolated Microgrid Using Actual Data

Energies ◽  
2022 ◽  
Vol 15 (1) ◽  
pp. 330
Author(s):  
Md Masud Rana ◽  
Akhlaqur Rahman ◽  
Moslem Uddin ◽  
Md Rasel Sarkar ◽  
Sk. A. Shezan ◽  
...  
Keyword(s):  
Comparative Analysis ◽  
Energy Savings ◽  
Storage System ◽  
Peak Load ◽  
Electrical Energy ◽  
Energy Storage System ◽  
Variable Load ◽  
Peak Demand ◽  
Peak Shaving ◽  
General Capacity

Peak load reduction is one of the most essential obligations and cost-effective tasks for electrical energy consumers. An isolated microgrid (IMG) system is an independent limited capacity power system where the peak shaving application can perform a vital role in the economic operation. This paper presents a comparative analysis of a categorical variable decision tree algorithm (CVDTA) with the most common peak shaving technique, namely, the general capacity addition technique, to evaluate the peak shaving performance for an IMG system. The CVDTA algorithm deals with the hybrid photovoltaic (PV)—battery energy storage system (BESS) to provide the peak shaving service where the capacity addition technique uses a peaking generator to minimize the peak demand. An actual IMG system model is developed in MATLAB/Simulink software to analyze the peak shaving performance. The model consists of four major components such as, PV, BESS, variable load, and gas turbine generator (GTG) dispatch models for the proposed algorithm, where the BESS and PV models are not applicable for the capacity addition technique. Actual variable load data and PV generation data are considered to conduct the simulation case studies which are collected from a real IMG system. The simulation result exhibits the effectiveness of the CVDTA algorithm which can minimize the peak demand better than the capacity addition technique. By ensuring the peak shaving operation and handling the economic generation dispatch, the CVDTA algorithm can ensure more energy savings, fewer system losses, less operation and maintenance (O&M) cost, etc., where the general capacity addition technique is limited.

scholarly journals A Planning Method for Energy Storage System of Integrated Community Energy System Considering Demand Response

2021 ◽  
Vol 252 ◽  
pp. 03009
Author(s):  
Jinghua Li ◽  
Chenbing Hua ◽  
Deyu Jiang ◽  
Qian Jiang ◽  
Kuihua Wu
Keyword(s):  
Energy Storage ◽  
Demand Response ◽  
Storage System ◽  
Peak Load ◽  
Electrical Energy ◽  
Energy System ◽  
Energy Storage System ◽  
Planning Method ◽  
Energy Utilization ◽  
Maintenance Cost

Demand response plays a significant role in peak load shifting, storage capacity configuration and renewable energy utilization. A bi-level planning method for energy storage system of integrated community energy system considering the demand response is proposed in this paper. In the upper level, the investment cost of electrical energy storage and thermal energy storage, operation and maintenance cost and fuel cost of the integrated community energy system, as well as the compensation cost to the energy consumer, are considered; in the lower level, the responded demand of the energy consumer is taken into consideration to minimize the energy bill of the energy consumer. An actual planning for energy storage system of integrated community energy system shows the effectiveness of the proposed method.

Modeling an Energy Storage System Based on a Hybrid Renewable Energy System in Stand-alone Applications

2017 ◽  
Vol 68 (11) ◽  
pp. 2641-2645
Author(s):  
Alexandru Ciocan ◽  
Ovidiu Mihai Balan ◽  
Mihaela Ramona Buga ◽  
Tudor Prisecaru ◽  
Mohand Tazerout
Keyword(s):  
Renewable Energy ◽  
Energy Storage ◽  
Storage Systems ◽  
Renewable Energy Sources ◽  
Storage System ◽  
Energy Storage System ◽  
Compressed Air ◽  
Energy Sources ◽  
Energy Storage Systems ◽  
Hybrid Renewable Energy System

The current paper presents an energy storage system that stores the excessive energy, provided by a hybrid system of renewable energy sources, in the form of compressed air and thermal heat. Using energy storage systems together with renewable energy sources represents a major challenge that could ensure the transition to a viable economic future and a decarbonized economy. Thermodynamic calculations are conducted to investigate the performance of such systems by using Matlab simulation tools. The results indicate the values of primary and global efficiencies for various operating scenarios for the energy storage systems which use compressed air as medium storage, and shows that these could be very effective systems, proving the possibility to supply to the final user three types of energy: electricity, heat and cold function of his needs.

Optimal Allocation of Energy Storage System in Distribution Systems with Intermittent Renewable Energy

2021 ◽  
Vol 19 (02) ◽  
pp. 288-296
Author(s):  
Luiz Renato Braz Pontes ◽  
Yuri Percy Molina Rodriguez ◽  
Jaime Luyo Kuong ◽  
Hugo Rojas Espinoza
Keyword(s):  
Renewable Energy ◽  
Energy Storage ◽  
Distribution Systems ◽  
Optimal Allocation ◽  
Storage System ◽  
Energy Storage System
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