scholarly journals Methodology to Evaluate the Impact of Electric Vehicles on Electrical Networks Using Monte Carlo

Energies ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1300
Author(s):  
Daniel Betancur ◽  
Luis F. Duarte ◽  
Jesús Revollo ◽  
Carlos Restrepo ◽  
Andrés E. Díez ◽  
...  
Keyword(s):  
Monte Carlo ◽  
Transmission Lines ◽  
Probability Distributions ◽  
Flow Analysis ◽  
Geographic Location ◽  
Load Flow ◽  
Electric Power System ◽  
Power Grids ◽  
Electrical Networks ◽  
The Impact

In preparation for the electric mobility technological transition in Colombia, an impact assessment of the electric power system is required, considering the increasing loading that must be able to be managed in the future. In this paper, a plug-in electric vehicle (PEV) charging simulation methodology is developed in order to dimension the impact of this type of load on power grids. PEV electric properties, user charging behaviors, geographic location, trip distances, and other variables of interest are modeled from empirical or known probability distributions and later evaluated in different scenarios using Monte Carlo simulation and load flow analysis. This methodology is later applied to the transmission network of Antioquia (a department of Colombia) resulting in load increases of up to 40% on transmission lines and 20% on transformers in a high PEV penetration scenario in 2030, increases that are well within the expected grid capacity for that year, avoiding the need for additional upgrades.

scholarly journals Impact Analysis of 220 Kv And 400 Kv Transmission Lines on The Integrated Nepal Power System

2020 ◽  
Vol 2 (1) ◽  
pp. 75-80
Author(s):  
Ganesh Bhandari ◽  
Bishal Rimal ◽  
Sandeep Neupane
Keyword(s):  
Power System ◽  
Transmission Line ◽  
Transmission Lines ◽  
Impact Analysis ◽  
Flow Analysis ◽  
Load Flow ◽  
Active Power ◽  
Total System ◽  
Voltage Profile ◽  
The Impact

 Power is an essential requirement for the economic development of any country. To maintain the generation of electric power at an adequate level the power has to be transmitted in a proper form to the consumer. For determination of line losses, voltage profiles and expansion of system, load flow analysis is most essential tools. This paper deals with the impact analysis of new 220 kV and 400 kV lines on Interconnected Nepal Power System (132 kV grid) in Electrical Transient Analyzer Program (ETAP). It represents the present scenario of the power system of Nepal and their impact analysis. Load flow result of existing 132 kV line shows that there is about 44.56 MW active power losses in the transmission line before any compensation techniques. After the Optimal Capacitor Placement, in the existing transmission line the active power loss decreases to about 34.224 MW as well as the voltage profile at each bus improves. The load flow result of the under construction 220 kV and 400 kV lines on the existing line shows that the total system loss would decrease to about 27.445 MW with the voltage profile improvement. The simulated model, result and analysis are presented in this paper.

scholarly journals Análise de fluxo de potência através de métodos numéricos

2019 ◽  
Vol 40 ◽  
pp. 69
Author(s):  
Bruno Pereira do Nascimento ◽  
Caison Rodrigues Ramos ◽  
Aline Brum Loreto
Keyword(s):  
Numerical Methods ◽  
Power Systems ◽  
Transmission Lines ◽  
Power Flow ◽  
Flow Analysis ◽  
Electrical Energy ◽  
Basic Function ◽  
Electric Power System ◽  
Power Flow Analysis ◽  
Definition Of

The basic function of the Electric Power System is to supply electrical energy with quality and when requested. For this to be possible some analysis of the system is required, among them Power Flow Analysis. This analysis is important for the delineation of the power systems, as well as in the definition of the best conditions of operation, control and supervision of the existing systems. The system is modeled as follows: Generators, Loads, Reactors and Capacitors are connected between any node and the ground node, since the transmission lines and transformers are connected between any two nodes. Thus, the admittance matrix of the system will be generated through nodal analysis that will be solved by numerical methods. One of the objectives of this work aims to perform the power flow analysis of a system with the aid of numerical methods. Another objective is as well as to verify the accuracy of the results, with solutions obtained by the methods of Gauss Elimination, LU Factoration, Gauss Seidel and Crout Method, implemented in C language. The analysis of the accuracy of the results occurred through the relative error in comparison to the results obtained by MatLab software.

scholarly journals Power system analysis and integration of the proposed Nigerian 750-kV power line to the grid reliability

2021 ◽  
Vol 3 (12) ◽  
Author(s):  
Ademola Abdulkareem ◽  
T. E. Somefun ◽  
C. O. A. Awosope ◽  
O. Olabenjo
Keyword(s):  
Transmission Lines ◽  
System Analysis ◽  
Flow Analysis ◽  
Ring Structure ◽  
Load Flow ◽  
Maximum Efficiency ◽  
Contingency Analysis ◽  
Power System Analysis ◽  
Load Flow Analysis ◽  
Critical Areas

AbstractThe present situation of power generation in Nigeria obviously represents a challenge to our ability for rethinking the delivery of energy at maximum efficiency. Previous research on the existing Nigerian 330-kV network grid, recommended that the network be transformed from radial to ring because of high losses inherent in it and the voltage insecurity. In this study, the existing 330-kV network was reconfigured based on the identified regions mapped out for upgrade to form a ringed 750-kV super grid. The bus voltages of some of the buses in the existing 330-kV were upgraded to 750-kV and new transmission lines added to create an integrated super grid with a ring structure as compared to the radial nature of the existing 330-kV grid. These proposed buses have been selected for upgrade based on the fact that they are positioned in critical areas within the topology of the grid that transforms the existing radial structure to a ring one. The method is also cheaper than making the entire network a 750-kV system. Load-flow analysis was carried out on the existing 330-kV Nigerian Grid and the proposed Nigerian 750-kV integrated into the existing grid using Newton–Raphson algorithm. The results analysis of the new network revealed a significant reduction of 30.2% power loss. This was validated using the code-based MATLAB and Power World Simulation model-based software. Contingency analysis was also carried out on both grids using the Power World Simulator. The study revealed that the 750-kV super grid was able to mitigate the losses experienced on the existing grid significantly with better voltage profiles in all the buses. It also revealed that the new network (330-kV and 750-kV integrated) performed better to the single line contingency analysis with less violations occurring and no unsolvable cases.

scholarly journals Power Quality and Performance Assessment of Grid-connected Photovoltaic Distributed Generation with Compliance to Stipulated Grid Integration Requirements

2021 ◽  
Vol 6 (7) ◽  
pp. 1-10
Author(s):  
Fredrick Nkado ◽  
Franklin Nkado
Keyword(s):  
Power Quality ◽  
Distribution System ◽  
Negative Impact ◽  
Flow Analysis ◽  
High Harmonic ◽  
Harmonic Distortion ◽  
Test System ◽  
Load Flow ◽  
Harmonic Load ◽  
The Impact

Recently, the demand for electrical energy has increased more than energy production due to the growing population and industrialization. Therefore, the distributed generators integration (DGs) into the distribution system has been widely adopted. This work examines the effect of photovoltaic-based distributed generator (PV-DG) integration on power quality effect of a radial distribution system. Firstly, the capacity and optimum placement of the PV-DG units in the distribution network are determined by employing the particle swarm optimization (PSO) algorithm. Then, the impact of PV-DG integration on voltage harmonic distortion is analyzed by performing harmonic load flow analysis. Also, the P-V curve method is used to evaluate the effects of higher PV-DG penetration levels on loading margin and voltage magnitude. The simulation results show that as the PV-DG units’ penetration level increases, a greater level of harmonic distortion is injected, implying that the PV-DG units should only be integrated up to the network’s maximum capacity. Therefore, high harmonic distortion is produced when the PV-DG units are penetrated beyond this maximum penetration level, which has a negative impact on the system’s performance. The total voltage harmonic distortion is 4.17 % and 4.24 % at PCC1 and PCC2 at the highest penetration level, allowing the acceptable harmonic distortion limit. Also, grid-connected PV-DG units improve loading margin and voltage magnitude, according to the P-V curve results. The standard IEEE-33 bus distribution system is modelled in ETAP software and is used as a test system for this study.

scholarly journals Load Flow Analysis in Hybrid AC-DC Transmission Network

2021 ◽  
pp. 617-624
Author(s):  
Ajith M ◽  
Dr. R. Rajeswari
Keyword(s):  
Power Systems ◽  
Power System ◽  
Transmission Lines ◽  
Power Flow ◽  
Reactive Power ◽  
Short Circuit ◽  
Flow Analysis ◽  
Load Flow ◽  
System Stability ◽  
And Control

Power-flow studies are of great significance in planning and designing the future expansion of power systems as well as in determining the best operation of existing systems. Technologies such as renewables and power electronics are aiding in power conversion and control, thus making the power system massive, complex, and dynamic. HVDC is being preferred due to limitations in HVAC such as reactive power loss, stability, current carrying capacity, operation and control. The HVDC system is being used for bulk power transmission over long distances with minimum losses using overhead transmission lines or submarine cable crossings. Recent years have witnessed an unprecedented growth in the number of the HVDC projects. Due to the vast size and inaccessibility of transmission systems, real time testing can prove to be difficult. Thus analyzing power system stability through computer modeling and simulation proves to be a viable solution in this case. The motivation of this project is to construct and analyze the load flow and short circuit behavior in an IEEE 14 bus power system with DC link using MATLAB software. This involves determining the parameters for converter transformer, rectifier, inverter and DC cable for modelling the DC link. The line chosen for incorporation of DC link is a weak bus. This project gives the results of load flow and along with comparison of reactive power flow, system losses, voltage in an AC and an AC-DC system.

scholarly journals Allocation of 0.4 kV PTL Sectionalizing Units under Criteria of Sensitivity Limits and Power Supply Reliability

2021 ◽  
Vol 11 (24) ◽  
pp. 11608
Author(s):  
Alina Vinogradova ◽  
Alexander Vinogradov ◽  
Vadim Bolshev ◽  
Andrey Izmailov ◽  
Alexey Dorokhov ◽  
...  
Keyword(s):  
Transmission Lines ◽  
Power Supply ◽  
Power Transmission ◽  
Short Circuit ◽  
Reducing Power ◽  
Power Transmission Lines ◽  
Electrical Networks ◽  
The Cost ◽  
The Impact ◽  
Supply Reliability

Sectionalizing 0.4 kV power transmission lines (PTL) improves power supply reliability and reduces electricity undersupply through the prevention of energy disconnection of consumers in the event of a short circuit in the power line behind the sectionalizing unit (SU). This research examines the impact of sectionalizing on power supply reliability and reviews the literature on sectionalizing unit allocation strategies in electrical networks. This paper describes the experience of the use of sectionalizing units with listing strengths and weaknesses of adopted technical solutions and describes the new structure of sectionalizing units. A new methodology is proposed, whereby there are two criteria for allocating SU in 0.4 kV power transmission lines. The first criterion is the sensitivity limits against single-phase short circuits used for calculating the maximum distance at which SU can be installed. The second criterion is power supply reliability improvement, evaluating the cost-effectiveness of installing sectionalizing equipment by reducing power supply outage time. The established methodology was put to the test on an actual electrical system (Mezenka village, Orel area, Russia), which demonstrated that the installation of a sectionalizing unit paid off.

scholarly journals Load Flow Analysis and Short Circuit Faults with the Additional Distributed Generation Wind Turbine 300 kW at Andalas University

2021 ◽  
Vol 1 (1) ◽  
pp. 41-47
Author(s):  
Fadhel Putra Winarta ◽  
Yoli Andi Rozzi
Keyword(s):  
Power System ◽  
Wind Turbine ◽  
Electric Power ◽  
Power Flow ◽  
Voltage Drop ◽  
Short Circuit ◽  
Flow Analysis ◽  
Load Flow ◽  
Electric Power System ◽  
A Value

The study of electric power flow analysis (Load Flow) is intended to obtain information about the flow of power or voltage in an electric power system network. This information is needed to evaluate the performance of the power system. Electrical power flow problems include calculating the flow and system voltage at certain terminals or buses. The benefits of this power flow study are to find out the voltage at each node in the system, to find out whether all the equipment meets the specified limits to deliver the desired power, and to obtain the original conditions in the new system planning. This study is divided into two: the analysis of data when the conditions have not been added wind turbine and after the addition of 300 kW wind turbine with software power station ETAP software 12.6.0 and the Newton-Raphson method will be used in analyzing the power flow of the electric power system. Based on the results of the tests, it is found that the overall value of losses for power flow before the addition of DG is 0.031 MW and 0.037 Mvar, for the voltage drop with the lowest percentage, namely on bus 10 with a percentage of 96.45 for the 0.4 kV system and the 20 kV system on bus 19 with a percentage of 99.03, the largest% PF load was in lump 1 with 98.64 and the smallest% PF was in lump7 with a value of 84.92. The short circuit data value on the 20 kV bus system at Andalas University before the addition of DG with 3-phase disturbances averaged 13.354 A, 1-phase disturbances averaged 3.521 A, 2-phase disturbances averaged 11.719 A and 2 ground phases of 12.842 A Whereas for the value of power flow after the addition of DG in the form of the wind turbine of 300 kW the overall value of losses is 0.032 MW and 0.042 MvarAR, for the voltage drop with the percentage for voltage drop with the lowest percentage is bus 10 with a percentage of 96.63 for system 0, 4 kV and a 20 kV system on bus 14 with a percentage of 98.1, the largest% PF load is in lump 1 with 98.64 and the smallest% PF is in lump7 with a value of 84.92. The short circuit data value on the 20 kV bus system at Andalas University after the addition of DG with 3 phase disturbances has an average value of 13.354 A, 1 phase disturbance averages 3.523 A, 2 phase disturbances average 11.737 A and 2 phases ground is 12.059 A For the source in this system, after the addition of DG, there was a change in the% PF of the PLN grid, namely 79.53 and the wind turbine -83%.

scholarly journals Challenges and methods of monitoring the occurrence of unsanctioned voltage in the power grid

2021 ◽  
Vol 288 ◽  
pp. 01111
Author(s):  
Alexander Panfilov ◽  
Alexander Vinogradov ◽  
Alina Vinogradova ◽  
Vadim Bolshev ◽  
Zumeira Shakurova ◽  
...  
Keyword(s):  
Transmission Lines ◽  
Power Transmission ◽  
Power Grids ◽  
Power Transmission Lines ◽  
Electrical Networks ◽  
Electric Networks ◽  
Electric System ◽  
Operation Modes ◽  
Network Operation ◽  
Methodological Principles

The review of sources dedicated to the issues of monitoring in electric networks made in the article showed that the works of many scientists are aimed at developing methods, technical means, systems for monitoring current and voltage in various operation modes of power grids. The main objectives of monitoring are identified, it is shown that monitoring of parameters in the network operation modes provides observability of the network, which, in turn, allows to make timely decisions about switching in the network, regulating the parameters of the network operation modes. The relevance of monitoring for detecting cases of unauthorized voltage in the 0.4 kV power networks is shown. Similar cases lead to the risk of electric shock to people, increasing the risk of operating electrical networks. Identification of the occurrence of unauthorized voltage in the 0.4 kV network provides ways to prevent its transformation at substations of 10/0. 4 kV to a voltage of 10 kV. Therefore, it is relevant to develop methods for detecting unauthorized voltage in the 0.4 kV electric system. The methodological principles and one of the developed methods for monitoring the occurrence of unauthorized voltage in power transmission lines of 0.4 kV and blocking the reverse transformation on substations 10/0.4 kV, as well as the device for its implementation, are shown.

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