scholarly journals Application of Marine Predator Algorithm in Solving the Problem of Directional Overcurrent Relay in Electrical Power System

2021 ◽  
Vol 12 (1) ◽  
pp. 9
Author(s):  
Abdul Wadood ◽  
Shahbaz Khan ◽  
Bakht Muhammad Khan ◽  
Husan Ali ◽  
Zabdur Rehman
Keyword(s):  
Power Systems ◽  
Electrical Power ◽  
Operating Time ◽  
Foraging Strategy ◽  
Power Losses ◽  
Electrical Power System ◽  
Electrical Power Systems ◽  
Marine Predator ◽  
Overcurrent Relay ◽  
Global Optimal

In electrical power systems, directional overcurrent relay (DOCR) coordination is assumed to be an essential component of the system for protection purposes. To diminish and reduce power losses, the coordination between these relays ought to be kept at an ideal value to minimalize the overall operating time of all primary-relay shortcoming situations. The coordination of DOCR is a complex and profoundly compelling nonlinear problem. The objective function is to minimalize the overall total operating time of all essential relays to minimize inordinate breakdown and interference. Coordination is performed using the marine predator algorithm (MPA), inspired by a widespread foraging strategy, namely Lévy and Brownian movements, to search for global optimal solutions in order to resolve the DOCRs coordination issue. The results acquired from MPA are equated with other state-of-the-art algorithms, and it was observed that the proposed algorithm outperforms other algorithms.

Assessment and Planning of the Electrical Systems in Mexican Refineries by 2014

2011 ◽  
Author(s):  
Luis Ivan Ruiz Flores ◽  
J. Hugo Rodri´guez Marti´nez ◽  
Guillermo D. Taboada ◽  
Javier Pano Jimenez
Keyword(s):  
Power Systems ◽  
Power Plants ◽  
Electrical Power ◽  
Refining Industry ◽  
Oil Refining ◽  
Electrical Power System ◽  
Electrical Power Systems ◽  
New Process ◽  
Process Plants ◽  
Petroleum Company

Nowadays the refining sector in Mexico needs to increase the quantity and quality of produced fuels by installing new process plants for gasoline and ultra low sulphur diesel. These plants require the provision of electricity and steam, among other services to function properly, which can be supplied by the power plants currently installed in each refinery through an expansion of their generation capacity. These power plants need to increase its production of electricity and steam at levels above their installed capacity, which involves the addition of new power generating equipment (gas or steam turbo-generators) as well as the raise of the electrical loads. Currently, the Mexican Petroleum Company (PEMEX) is planning to restructure their electrical and steam systems in order to optimally supply the required services for the production of high quality fuels. In this paper the present status of the original electrical power systems of the refineries is assessed and the electrical integration of new process plants in the typical schemes is analyzed. Also this paper shows the conceptual schemes proposed to restructure the electrical power system for two refineries and the strategic planning focused on implement the modifications required for the integration of new process plants that will demand about 20 MW for each refinery by 2014. The results of the analysis allowed to identify the current conditions of the electrical power systems in the oil refining industry or National Refining Industry (NRI), and thereby to offer technical solutions that could be useful to engineers facing similar projects.

scholarly journals REDUCING THE LIKELIHOOD OF ELECTRICAL POWER-RELATED DISASTERS: A FUZZY MCDM APPROACH

2018 ◽  
Vol 9 (1) ◽  
pp. 679-686
Author(s):  
Eko Setiawan ◽  
Septin Puji Astuti ◽  
Handoko Handoko
Keyword(s):  
Power Systems ◽  
Power System ◽  
Selection Process ◽  
Human Life ◽  
Electrical Power ◽  
Electrical Power System ◽  
Electrical Power Systems ◽  
Analytic Hierarchy ◽  
Electricity Power ◽  
Negative Impacts

Many of disasters are related to electrical power systems. They affect human life and economy. In order to reduce the negative impacts caused by the failure of electricity power system due to disasters and to create a robust electrical power system, selecting the best relay of electricity power is a must. This study identified the best protective relay of electrical power systems of PLN in Surakarta region by applying analytic hierarchy process (AHP), one of MCDM approaches, combined with fuzzy logic. Extent analysis approach was implemented to derive priorities of various criteria, sub-criteria and alternatives. Three relays being considered in the selection process are electromagnetic relay, digital relay and static relay. Four criteria in this study are techno-economy, fault frequency, protection of transmission line and advantage of relay over others. Meanwhile, five sub-criteria for each criterion are reliability, selectivity, sensitivity, working speed and efficient. Based on the criteria and sub-criteria, it can be inferred that in terms of four working areas of PLN management in Surakarta region, digital relay is seen as the best choice of relays.

scholarly journals A Survey on Power Grid Faults and Their Origins: A Contribution to Improving Power Grid Resilience

Energies ◽  
2019 ◽  
Vol 12 (24) ◽  
pp. 4667 ◽  
Author(s):  
Adriana Mar ◽  
Pedro Pereira ◽  
João F. Martins
Keyword(s):  
Power Systems ◽  
Power Grid ◽  
Electrical Power ◽  
Power Grids ◽  
Electrical Power System ◽  
Electrical Power Systems ◽  
Different Types ◽  
System Resilience ◽  
Types Of Faults ◽  
Power System Resilience

One of the most critical infrastructures in the world is electrical power grids (EPGs). New threats affecting EPGs, and their different consequences, are analyzed in this survey along with different approaches that can be taken to prevent or minimize those consequences, thus improving EPG resilience. The necessity for electrical power systems to become resilient to such events is becoming compelling; indeed, it is important to understand the origins and consequences of faults. This survey provides an analysis of different types of faults and their respective causes, showing which ones are more reported in the literature. As a result of the analysis performed, it was possible to identify four clusters concerning mitigation approaches, as well as to correlate them with the four different states of the electrical power system resilience curve.

Harmonic Solutions To Commercial And Industrial Electrical Power Systems

2015 ◽  
Vol 6 (1) ◽  
Author(s):  
Amarjeet Singh
Keyword(s):  
Power Systems ◽  
Power System ◽  
System Reliability ◽  
Electrical Power ◽  
Harmonic Distortion ◽  
System Capacity ◽  
Electrical Power System ◽  
Electrical Power Systems

Problems associated with harmonic distortion are well understood for electrical power system applications.The right solution is challenging. There are numerous technologies to choose from, each with specific technical and economic advantages. This paper provides recommendations for reducing harmonic distortion, improving system capacity and improving system reliability. Special considerations for applying capacitors on a power systems with harmonics will be discussed.

scholarly journals Analysis of Cyber Attacks Vulnerabilities In Electrical Power Systems

2019 ◽  
Vol 8 (9) ◽  
pp. 925-928
Keyword(s):  
Power Systems ◽  
Smart Grids ◽  
Electrical Power ◽  
Cyber Attacks ◽  
Power Grids ◽  
Electrical Power System ◽  
Smart Meters ◽  
Electrical Power Systems ◽  
Different Types ◽  
Intelligent Electronic Devices

The term “Smart grid” is used for the modernized electrical power system grids. Power grids as we know it is a collection of generation units and load centers that are connected through power lines. Smart grids are a newer version of power grids which basically is the digitalization of the infrastructure with the involvement of smart meters, sensors and different types of IED’s (Intelligent Electronic Devices). As the grids become smart they become vulnerable to attacks over the internet i.e., cyber attacks

scholarly journals Modelling and simulation of house load operation of HPR1000 NPP

2021 ◽  
Vol 2087 (1) ◽  
pp. 012010
Author(s):  
Xiaowei Chen ◽  
Hui Sun ◽  
Changchun Zhai ◽  
Qingliang Zhang
Keyword(s):  
Power Systems ◽  
Nuclear Power ◽  
Electrical Power ◽  
Simulation Modelling ◽  
Electrical Power System ◽  
Electrical Power Systems ◽  
Acceptance Criteria ◽  
Primary Loop ◽  
Main Work ◽  
Secondary Loop

Abstract In this paper, the house load operation of the unit is evaluated, taking the third-generation Nuclear Power Plant (NPP) HPR1000 as an example, considering the primary loop, the secondary loop and the entire on-site electrical power systems. The main work of this study is as following: Firstly, acceptance criteria and specific numerical requirements are set out; the simulation result should meet the relevant criteria. Secondly, the Simulink simulation model of the entire system is built in detail, which can be divided into primary loop, secondary loop and on-site electrical power system parts, with emphasis on the simulation modelling of the turbine generator unit. The component models of each part and their corresponding connection relationships of each part are shown and given. Finally, a house load operation simulation is performed, and the result is compared with the acceptance criteria to verify that whether the generator has the ability to transfer to house load operation as designed.

Ant Colony Optimization Algorithm for Electrical Power Systems Applications

2022 ◽  
pp. 37-59
Author(s):  
Ragab A. El-Sehiemy ◽  
Almoataz Y. Abdelaziz
Keyword(s):  
Power Systems ◽  
Ant Colony Optimization ◽  
Optimization Problems ◽  
Optimization Algorithms ◽  
Electrical Power ◽  
Ant Colony ◽  
Ant Colony Optimization Algorithm ◽  
Electrical Power System ◽  
Electrical Power Systems ◽  
Recent Developments

Optimization has been an active area of research for several decades. As many real-world optimization problems become increasingly complex, better optimization algorithms are always needed. Recently, meta-heuristic global optimization algorithms have become a popular choice for solving complex and intricate problems, which are otherwise difficult to solve by traditional methods. This chapter reviews the recent applications of ant colony optimization (ACO) algorithm in the field of electrical power systems. Also, the progress of the ACO algorithm and its recent developments are discussed. This chapter covers the aspects like (1) basics of ACO algorithm, (2) progress of ACO algorithm, (3) classification of electrical power system applications, and (4) future of ACO for modern power systems application.

scholarly journals Modeling and Validation of a Directional Overcurrent Relay as an Island Interconnection Device

2020 ◽  
Author(s):  
Wandry R. Faria ◽  
Jonas V. Souza ◽  
Rodrigo B. Otto ◽  
Benvindo R. Pereira Jr.
Keyword(s):  
Power Systems ◽  
Power Flow ◽  
Distribution Systems ◽  
Short Circuit ◽  
Electrical Power ◽  
Distribution Networks ◽  
Test System ◽  
Electrical Power Systems ◽  
Distributed Generators ◽  
Overcurrent Relay

The growing number of decentralized generators in the distribution systems and the consequent increase in the penetration level in the networks have prompted the inclusion of this scenario in researches involving the planning of electrical power systems. The planning of protection systems for distribution networks considering distributed generators requires adaptations in the approach due to modifications in characteristics of the network, such as passivity and unidirectional power flow. Furthermore, the insertion of generators in distribution networks allows the implementation of new operation methods, such as the possibility of disconnecting some loads from the main feeder and supplying them through distributed generators. The island operation can improve the service continuity indexes, as well as reduce the costs of non-supplied energy. Although the island operation is widely proposed in the literature as a means to improve the system's reliability, the simulation of a protective device to intentionally island a region and the verification of its limitations is not. In this paper, we present the modeling of a directional overcurrent relay through ATP-EMTP, and its employment as a device for island interconnection, analyzing its zone of non-operation. CIGRE 14-bus test system is used to conduct short-circuit tests with the variation of resistance and type of fault applied. Theresults show the effectiveness of the device, which is able to identify all faults with real impact on the network, placing the region in island operation in less than 20 ms.

Fuzzy Logic Based Electrical Power System for Pico Satellite ERPSat-1

2014 ◽  
Vol 875-877 ◽  
pp. 1822-1826 ◽  
Author(s):  
Bilel Neji ◽  
Chafaa Hamrouni ◽  
Adel M. Alimi ◽  
Hiroshi Nakajima
Keyword(s):  
Fuzzy Logic ◽  
Power Systems ◽  
Power System ◽  
Electrical Power ◽  
Low Earth Orbit ◽  
Electrical Power System ◽  
Electrical Power Systems ◽  
Small Satellites ◽  
Efficient Energy ◽  
Intelligent Machines

Despite the recent advances in space technologies, electrical power systems still are challenging researchers developing small satellites for low earth orbit use. In order to supply their subsystems, these satellites can only use the power stored on board from solar energy. Therefore, the electrical power system should ensure a maximum exploitation of energy sources and optimize the distribution of the available electrical power. In this context, Research Group of Intelligent Machines Laboratory in Tunisia developed a new intelligent electrical power subsystem to be used for pico satellites. This subsystem is based on fuzzy logic allowing a faster energy storage and better and efficient energy distribution. The intelligent electrical power subsystem was successfully integrated in ERPSat-1 pico satellite. In addition, the simulation has shown better results compared to other used methods in the previous electrical power systems used for small satellites.

Protection Study in the EPS, Electrical Power System

2021 ◽  
pp. 377-394
Author(s):  
Gustavo Vinicius Duarte Barbosa ◽  
José Ronaldo Tavares Santos
Keyword(s):  
Power Systems ◽  
Power System ◽  
Regulatory Agency ◽  
Short Circuit ◽  
Salt Spray ◽  
Electrical Power ◽  
Electrical Power System ◽  
Electrical Power Systems ◽  
Two Phase ◽  
Three Phase

Electrical power systems are susceptible to faults caused, for example, by storm, pollution, vandalism, lightning, salt spray, etc. The unscheduled interruption in the supply of electricity to consumers, whether industrial, residential, or commercial, entails severe fines for the transmission utility and/or electricity distributor, imposed by the regulatory agency. Thus, the EPS must have a well-dimensioned protection system, capable of identifying the fault, which is characterized by a single-phase, two-phase, three-phase short circuit, among others, and interrupt the missing section in the minimum time so that the effects of this lack are as small as possible for the SEP, especially with regard to its integrity and operational security.

Sign in / Sign up

Export Citation Format

Share Document