scholarly journals Analysis of flexibility of power systems as the method for analyzing a power system security in modern conditions

2020 ◽  
Vol 216 ◽  
pp. 01026
Author(s):  
Alexey Osak ◽  
Elena Buzina
Keyword(s):  
Power Systems ◽  
Electric Vehicles ◽  
System Reliability ◽  
Power Plants ◽  
Scientific Research ◽  
Power Grids ◽  
Small Power ◽  
Storage Devices ◽  
Scientific Results ◽  
Mass Construction

In modern conditions, when there is a mass construction of small power plants based on renewable sources, the installation of power storage devices is gaining pace, consumers ' electrical installations are being modified, they are becoming adaptive and intelligent, there is a process of mass appearance of electric vehicles, and a revision of traditional provisions in the field of system reliability of power systems is required. Scientific research in the field of EPS flexibility has recently been intensified, and this flexibility is considered in a fairly broad setting. It is important to note that the issues of EPS flexibility are not new, but the term “flexibility” was not used to refer to this issue before, although all the main issues were considered within the framework of the topic of system reliability and development of EES, and the issue of continuity of modern research with previous scientific research and existing scientific results is important. Traditionally, one of the aspects of system reliability has been the power security of the EPS, which refers to the ability of the system to withstand sudden disturbances without unintended impacts on electricity consumers. At the same time, the analysis of power security was mainly performed only in the volume of the system-forming power gird of the EPS. For the power systems of the future, the importance of power security increases significantly, but as an analysis of the power security of the system-forming and distribution power grids together.

scholarly journals Using the flexibility of EPS as a means of improving the system reliability of power systems in modern conditions

2020 ◽  
Vol 209 ◽  
pp. 02024
Author(s):  
Alexey Osak ◽  
Elena Buzina
Keyword(s):  
Power Systems ◽  
System Reliability ◽  
Scientific Research ◽  
Power Grids ◽  
Problem Statement ◽  
The Future ◽  
Scientific Results

Scientific research in the field of EPS flexibility has recently been intensified, and this flexibility is considered in a fairly broad setting. It is important to note that the issues of EPS flexibility are not new, but the term “flexibility” was not used to refer to this issue before, although all the main issues were considered within the framework of the topic of system reliability and development of EES, and the issue of continuity of modern research with previous scientific research and existing scientific results is important. Traditionally, one of the aspects of system reliability has been the power security of the EPS, which refers to the ability of the system to withstand sudden disturbances without unintended impacts on electricity consumers. At the same time, the analysis of power security was mainly performed only in the volume of the system-forming power gird of the EPS. For the power systems of the future, the importance of power security increases significantly, but as an analysis of the power security of the system-forming and distribution power grids together. For a number of years, the authors have been engaged in research in the field of mode reliability using the method of calculating EPS modes taking into account discrete and interval characteristics of mode parameters. This method allows us to study the properties of controllability of power systems of the future in the required problem statement.

scholarly journals Optimal Pricing of Vehicle-to-Grid Services Using Disaggregate Demand Models

Energies ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 1090
Author(s):  
Charilaos Latinopoulos ◽  
Aruna Sivakumar ◽  
John W. Polak
Keyword(s):  
Power Systems ◽  
Electric Vehicles ◽  
Power Grids ◽  
Local Distribution ◽  
Technical Problems ◽  
Vehicle To Grid ◽  
Distribution Transformers ◽  
Demand Models ◽  
Multiple Vehicles ◽  
Infrastructure Investments

The recent revolution in electric mobility is both crucial and promising in the coordinated effort to reduce global emissions and tackle climate change. However, mass electrification brings up new technical problems that need to be solved. The increasing penetration rates of electric vehicles will add an unprecedented energy load to existing power grids. The stability and the quality of power systems, especially on a local distribution level, will be compromised by multiple vehicles that are simultaneously connected to the grid. In this paper, the authors propose a choice-based pricing algorithm to indirectly control the charging and V2G activities of electric vehicles in non-residential facilities. Two metaheuristic approaches were applied to solve the optimization problem, and a comparative analysis was performed to evaluate their performance. The proposed algorithm would result in a significant revenue increase for the parking operator, and at the same time, it could alleviate the overloading of local distribution transformers and postpone heavy infrastructure investments.

scholarly journals Challenges for Future Flexible Electric Power Systems

2021 ◽  
Vol 1 (1) ◽  
pp. 1-7
Author(s):  
Ali Feliachi
Keyword(s):  
Power Systems ◽  
Electric Power ◽  
Electric Vehicles ◽  
Renewable Resources ◽  
Electric Power Systems ◽  
Storage Devices ◽  
High Penetration ◽  
New Challenges ◽  
And Control ◽  
And Storage

This paper describes some of the challenges that face the operation of future electric power systems. These systems are becoming more flexible and agile. Their physical structures and connections are continuously changing as microgrids, electric vehicles, and other generation and storage devices are connected/disconnected from the grid, which result in new challenges for the operation, management, and control of the systems of the future that incorporate active participation of the consumers, and high penetration of intermittent nature renewable resources such as wind and solar.

scholarly journals APPLICATION OF DESIGN APPROACH TO IMPLEMENTATION OF ENERGY EFFICIENT TECHNOLOGIES

2020 ◽  
pp. 290-295
Author(s):  
A. Yevdokymova ◽  
A. Dehtiarenko ◽  
N. Petrenko
Keyword(s):  
Power Systems ◽  
Energy Efficient ◽  
Energy Production ◽  
Alternative Energy ◽  
Power Plants ◽  
Renewable Energy Sources ◽  
Energy System ◽  
Power Grids ◽  
Electrical Networks ◽  
Energy Network

The paper analyzes the peculiarities of the development of the energy sector in Ukraine, as well as in European countries. Existing approaches to energy production are shown. The situation in Ukraine has changed in recent years. Energy production has shifted from centralized to distributed. The emergence of new types of power plants has made it possible to connect to the grid in places where it was previously impossible, a large number of consumers already have their own power units. Therefore, managing the energy network is becoming increasingly complex and therefore requires new approaches. The normative and legislative beginning of the active development of alternative energy in Ukraine already exists, and European and world experience should help Ukraine achieve energy independence and high environmental standards. Existing problems in the development of power grids arise due to the intensive growth of production and consumption of electricity, while the management of power systems is complicated by the growing share of distributed and renewable energy sources with changing production schedule. Improved controllability of electrical networks allows to prevent emergencies by load control programs, division of the network into autonomous zones, etc. Investment is a crucial factor in creating a flexible and efficient power grid based on innovative technical solutions. Implementation of energy efficiency projects is a guideline for improving the intelligent level of the energy system, which will allow energy companies to manage the energy network as a single system, increase profitability, reliability and uninterrupted, reduce technical and commercial losses, improve network management and efficiency. An important role is played by the interaction of all stakeholders in projects - the state, production, energy and energy sales companies, consumers and equipment manufacturers. Thus, the international experience in the transmission and distribution of electricity creates opportunities for successfully implementing projects for the introduction of energy-efficient technologies in our Ukraine.

scholarly journals Mixed Integer Quadratic Programming Based Scheduling Methods for Day-Ahead Bidding and Intra-Day Operation of Virtual Power Plant

Energies ◽  
2019 ◽  
Vol 12 (8) ◽  
pp. 1410 ◽  
Author(s):  
Rakkyung Ko ◽  
Daeyoung Kang ◽  
Sung-Kwan Joo
Keyword(s):  
Quadratic Programming ◽  
Power Systems ◽  
Power Plants ◽  
Power Grids ◽  
Mixed Integer ◽  
Virtual Power ◽  
Integer Quadratic Programming ◽  
Virtual Power Plants ◽  
Mixed Integer Quadratic Programming ◽  
The Impact

As distributed energy resources (DERs) proliferate power systems, power grids face new challenges stemming from the variability and uncertainty of DERs. To address these problems, virtual power plants (VPPs) are established to aggregate DERs and manage them as single dispatchable and reliable resources. VPPs can participate in the day-ahead (DA) market and therefore require a bidding method that maximizes profits. It is also important to minimize the variability of VPP output during intra-day (ID) operations. This paper presents mixed integer quadratic programming-based scheduling methods for both DA market bidding and ID operation of VPPs, thus serving as a complete scheme for bidding-operation scheduling. Hourly bids are determined based on VPP revenue in the DA market bidding step, and the schedule of DERs is revised in the ID operation to minimize the impact of forecasting errors and maximize the incentives, thus reducing the variability and uncertainty of VPP output. The simulation results verify the effectiveness of the proposed methods through a comparison of daily revenue.

scholarly journals Utilization of Electric Vehicles Connected to Distribution Substations for Peak Shaving of Utility Network Loads

2013 ◽  
Vol 2 (1) ◽  
pp. 47-54 ◽  
Author(s):  
Marek Mägi
Keyword(s):  
Electric Vehicles ◽  
Peak Load ◽  
Energy Resource ◽  
Power Grids ◽  
Energy Storage Devices ◽  
Peak Shaving ◽  
Power Sources ◽  
Storage Devices ◽  
Utility Network ◽  
Effective Integration

AbstractUse of modern electric vehicles and their effective integration into power grids depends on the technologies applied around distribution substations. Distribution substations equipped with energy storing and V2G capability enable peak load shaving and demand response, which will reduce the need to make new investments into building new power sources or power grids to meet peak demand. This paper presents a distribution substation topology for utilizing electric vehicles as energy resource units for peak shaving of utility network loads. The topology allows bidirectional energy exchange among electric vehicles, battery pack energy storage devices and utility networks. The substation acts as a service provider in a microgrid. Functions of a microgrid application were simulated with MATLAB. The evaluation of the results has shown that electric vehicles can be effectively utilized for peak shaving of utility network loads. The results of the modelling and simulation were used for the development of a microgrid prototype. Assessment of capacities of electric vehicles showed that electric vehicles can provide short term support for the utility network.

scholarly journals A Policy Effect Analysis of China’s Energy Storage Development Based on a Multi-Agent Evolutionary Game Model

Energies ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 6293
Author(s):  
Ting Zhang ◽  
Shuaishuai Cao ◽  
Lingying Pan ◽  
Chenyu Zhou
Keyword(s):  
Energy Storage ◽  
Power Plant ◽  
Electricity Market ◽  
Power Plants ◽  
Evolutionary Game ◽  
Power Grids ◽  
Game Model ◽  
Small Power ◽  
Storage Technology ◽  
Energy Storage Technology

Energy storage technology plays a significant role in the pursuit of the high-quality development of the electricity market. Many regions in China have issued policies and regulations of different intensities for promoting the popularization of the energy storage industry. Based on a variety of initial conditions of different regions, this paper explores the evolutionary process of electricity market players considering energy storage technology. The trilateral evolutionary game model is adopted to analyze the strategies of the power plant, the power grid, and the government. After assigning the model according to an actual situation, each equilibrium point corresponds to a real electricity market situation. The results indicate the following: (1) In the process of stabilizing, the role of “Advanced Imitators” leading the strategy of building energy storage changes between the power plant and the power grid. (2) In Eastern, Middle, and Southern China, the power plants and power grids on a greater-than-medium scale will choose to build energy storage without governmental regulations, due to the abundant net profit. (3) In the northeast of China, power plants with a medium-or-lower scale will choose not to build energy storage because of the relatively low on-grid price, and small power grids can make enough profits by operating energy storage facilities. (4) In Northern China, the large power plants and the medium power grids will choose to build energy storage due to the high electricity sale price and the resulting high profit. (5) In Western China, the small power plants and power grids cannot afford to build energy storage due to the low electricity price. The results lead to valuable policy suggestions for the local governments of China in promoting energy storage in the future. To meet the goal of energy storage popularization, regional electricity market plans need relevant policies based on its existing conditions, offering suitable external conditions for adding energy storage.

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