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 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.

Energy storage system for peak shaving

2016 ◽  
Vol 10 (1) ◽  
pp. 3-18 ◽  
Author(s):  
Kein Huat Chua ◽  
Yun Seng Lim ◽  
Stella Morris
Keyword(s):  
Adaptive Control ◽  
Energy Storage ◽  
Control Algorithm ◽  
Storage System ◽  
Threshold Level ◽  
Energy Storage System ◽  
Peak Demand ◽  
Peak Shaving ◽  
Content Type ◽  
Adaptive Control Algorithm

Purpose – The main purpose of this study is to provide an effective sizing method and an optimal peak shaving strategy for an energy storage system to reduce the electrical peak demand of the customers. A cost-savings analytical tool is developed to provide a quick rule-of-thumb for customers to choose an appropriate size of energy storage for various tariff schemes. Design/methodology/approach – A novel sizing method is proposed to obtain the optimum size of energy storage for commercial and industrial customers based on their historical load profile. An algorithm is developed to determine the threshold level for peak shaving. One of the buildings at Universiti Tunku Abdul Rahman (UTAR), Malaysia, is chosen for this study. A three-phase energy storage system rated at 15 kVA is developed and connected to the low-voltage electrical network in the building. An adaptive control algorithm is developed and implemented to optimize the peak shaving. Findings – The sizing analysis shows that the customer under the C2 tariff rate yields the highest saving, followed by E2, C1 and E1. The experimental results presented indicate that the proposed adaptive control algorithm has effectively optimized the peak demand to be shaved. Research limitations/implications – This study demonstrates the potential of energy storage in reducing the peak demand and cost of electricity. One of the main challenges of real-time peak shaving is to determine an appropriate threshold level such that the energy stored in the energy storage system is sufficient during the peak shaving process. Originality/value – The originality of the paper is the optimal sizing method of the energy storage system based on the historical load profile and adaptive control algorithm to optimize the peak demand deduction.

Feasibility study of grid-connected solar plant: An in-depth analysis of system modeling and proper technology selection

2020 ◽  
pp. 002072092092854
Author(s):  
Greg Stephens ◽  
Chris Dieterle ◽  
Eklas Hossain ◽  
Ramazan Bayindir
Keyword(s):  
Energy Storage ◽  
Storage Systems ◽  
Storage System ◽  
Peak Load ◽  
Energy Storage System ◽  
Production Costs ◽  
Technology Selection ◽  
Solar Array ◽  
Peak Shaving ◽  
Depth Analysis

One of the most significant issues arising from the intermittency of renewable sources is the discrepancy between the hours of peak generation and hours of peak load. This issue complicates the process of supply and demand balancing because the electrical energy generated by photovoltaic arrays cannot be directly stored. Energy storage systems provide a solution to this issue by storing the excess energy generated during peak generation time which will be delivered to the grid during peak load, increasing system energy efficiency. In this work, the possibility of utilizing a Megawatt scale energy storage system, such as a battery bank, to improve the efficiency of a proposed 10-MW Biglow Canyon solar array through solar peak shaving is discussed in detail. With an overview of the benefits of peak shaving and a comparative study of energy storage technologies, an assessment of the most suitable commercially available storage systems is broadly discussed in the paper. Three control algorithms based on battery storage, state of charge, and constant output are proposed to balance the difference between generation and usage using appropriate energy storage system. Simulations are performed with System Advisor Model software to gain an insight of the possible losses and to forecast the monthly energy production costs.

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.

scholarly journals Energy Storage for Peak Shaving in a Microgrid in the Context of Brazilian Time-of-Use Rate

Proceedings ◽  
2020 ◽  
Vol 58 (1) ◽  
pp. 16
Author(s):  
Rafael S. Salles ◽  
A. C. Zambroni de Souza ◽  
Paulo F. Ribeiro
Keyword(s):  
Energy Storage ◽  
Renewable Energy Sources ◽  
Storage System ◽  
Peak Load ◽  
Energy Storage System ◽  
Point Of View ◽  
Load Reduction ◽  
Peak Shaving ◽  
Save Energy ◽  
Battery Energy

The advance of the distributed generation in Brazil makes it essential to investigate the applications and transformations that the use of these new arrangements may entail. The use of non-centralized generation technologies associated with energy storage is interesting for several sectors of the energy market, even if the market is in the process of maturing these technologies. In the context of the time-of-use rate, these changes have allowed the consumer to use strategies to save energy bill costs, especially when its moment of most considerable consumption coincides with that of the highest tariff. In this paper, a Battery Energy Storage System (BESS) is used to perform commercial peak load reduction in a microgrid in connected mode. The microgrid also has a Photovoltaic (PV) Generator Farm as Renewable Energy Sources (RES) to provide load consumption and also to assist BESS in the peak shaving operation. The modeling and simulation of the system are performed by MATLAB/Simulink. The analysis demonstrates that the peak load reduction produces the expected financial benefits under a Brazilian time-of-use rate known as White Rate, in addition to carrying out the operation in a manner consistent with the technique from an electrical point of view. The software Homer Grid validates the potential savings. Thus, the results showed that the use of energy storage associated with renewable generation under a peak shaving strategy allows greater freedom for the consumer in the face of costs with main grid purchases.

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.  

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