scholarly journals Simulation of Self-Healing in Samawa City Distribution System

2020 ◽  
Vol 38 (11A) ◽  
pp. 1692-1705
Author(s):  
Mithaq A. Kadham ◽  
Thamir M. Abdul-Wahhab
Keyword(s):  
Distribution System ◽  
Distribution Network ◽  
Control Unit ◽  
Fault Isolation ◽  
Self Healing ◽  
Central Control Unit ◽  
Permanent Faults ◽  
Minimum Number ◽  
Power Restoration ◽  
The Impact

Self-healing is the ability of a distribution system to automatically restore power after permanent faults. This paper investigates the impact of outages in the distribution network elements following the occurrence of a fault. The work aims to restore maximum available power to consumers in the affected areas, after the isolation of faulted parts, by optimal procedure of switching operations. In this work, CYMDIST software was used for the simulation and analyses of a distribution network in Samawa City. MATLAB 2017b/Simulink was used to implement self-healing, through the simulation of smart protection system that is controlled remotely by a central control unit. The results of implementing the proposed self-healing system on Samawa a New 11 kV network show a maximum power restoration with a minimum number of switching operations that have been achieved after fault isolation without violating constraints.

scholarly journals Configurations of Aromatic Networks for Power Distribution System

2020 ◽  
Vol 12 (10) ◽  
pp. 4317
Author(s):  
K. Prakash ◽  
F. R. Islam ◽  
K. A. Mamun ◽  
H. R. Pota
Keyword(s):  
Power Distribution ◽  
Distribution System ◽  
Smart Grids ◽  
Sustainable Energy ◽  
Distribution Network ◽  
Geographical Location ◽  
Distribution Networks ◽  
Self Healing ◽  
Power Distribution System ◽  
Improve Energy Efficiency

A distribution network is one of the main parts of a power system that distributes power to customers. While there are various types of power distribution networks, a recently introduced novel structure of an aromatic network could begin a new era in the distribution levels of power systems and designs of microgrids or smart grids. In order to minimize blackout periods during natural disasters and provide sustainable energy, improve energy efficiency and maintain stability of a distribution network, it is essential to configure/reconfigure the network topology based on its geographical location and power demand, and also important to realize its self-healing function. In this paper, a strategy for reconfiguring aromatic networks based on structures of natural aromatic molecules is explained. Various network structures are designed, and simulations have been conducted to justify the performance of each configuration. It is found that an aromatic network does not need to be fixed in a specific configuration (i.e., a DDT structure), which provides flexibility in designing networks and demonstrates that the successful use of such structures will be a perfect solution for both distribution networks and microgrid systems in providing sustainable energy to the end users.

scholarly journals Analysis on the Effect of Capacitor Banks Operation towards Total Harmonic Distortions (THD) in Distribution Network Test System

2018 ◽  
Vol 1 (2) ◽  
Author(s):  
Dalila M.S. ◽  
Zaris I.M.Y. ◽  
Nasarudin A. ◽  
Faridah H.
Keyword(s):  
Power Distribution ◽  
Distribution System ◽  
Distribution Network ◽  
Harmonic Distortion ◽  
Test System ◽  
Free Access ◽  
Initial Value ◽  
Power Distribution System ◽  
Source Codes ◽  
The Impact

This paper purposely to examine and analyse the impact of the distribution capacitors banks operation to the transition of total harmonic distortion (THD) level in distribution network system. The main advantage of this work is the simplicity algorithm of the method and the system being analysed using free access open software which is known as electric power distribution system simulator (OpenDSS). In this paper, the harmonic current spectrum which is collected from the commercial site was injected to a node point on IEEE13 bus in order to provide the initial measurement of THD for the network. The proper sizing of the capacitors banks has been set and being deactivated and activated throughout the network to see the transistion in the THD level in the system. The results were achieved by simulation of the data on the configured IEEE13 bus. The simulation work was done by using the combination of C++ source codes, OpenDSS and Microsoft Excel software. From the output results, the THD current has increased up to two times from the initial value in certain phases and for the THD voltage, the THD has increased up to three times from its initial value in all phases.

scholarly journals FLISR Approach for Smart Distribution Networks Using E-Terra Software—A Case Study

Energies ◽  
2018 ◽  
Vol 11 (12) ◽  
pp. 3333 ◽  
Author(s):  
Duy Le ◽  
Duong Bui ◽  
Cao Ngo ◽  
Anh Le
Keyword(s):  
Fault Detection ◽  
Management System ◽  
Processing Time ◽  
Distribution Network ◽  
Data Communication ◽  
Distribution Networks ◽  
Fault Isolation ◽  
Service Restoration ◽  
Minimum Number ◽  
Terminal Units

A smart grid concept has been defined in recent years, which emphasizes the importance on smart protection and measurement devices, reliable data communication and high security, optimal energy management system, and fault detection, location, isolation and service restoration (FLISR) of distribution networks (DNs). The main objectives of the FLISR approach are to achieve fast fault processing time, reduce the minimum number of interrupted customers, and improve the power supply reliability of the distribution. The conventional FLISR approach is to use signals of fault indicators (FIs) with distribution network states. The discrete installation of FIs to switches or reclosers may slow the processing time of fault detection and location, so it is necessary to develop a more efficient FLISR approach for smart distribution networks using functions of feeder terminal units (FTUs). In this paper, pick-up and tripping signals of overcurrent (OC) relays in combination with distribution grid states (e.g., switching status of devices, loss of voltage…) sent from feeder terminal units (FTUs) are used to detect and locate different fault types. Fault isolation and service restoration of black-out areas are then performed by solving an objective function with two main constraints, including (i) restoring the possible maximum number of out-of-service loads; and (ii) limiting the minimum number of switching operation. Thirteen performance factors (PF) are used for the post-fault service restoration process, consisting of: (i) Power Flow Violations (PFV), (ii) Bus Voltage Violations (BVV), (iii) Total Operation Cost (TOC), (iv) Lost Power (LP), (v) Outage Customer (OC), (vi) Number of Switching Steps (NSS), (vii) Power Losses (LOSS); (viii) Customer Minutes Interruption (CMI), (ix) Load Minutes Interruption (LMI), (x) MAIFI, (xi) SAIFI, (xii) SAIDI, and (xiii) Protection Validation (PRV). E-Terra platform of a distribution management system (DMS) is used to implement the proposed FLISR approach. Simulation and experiment results from a real 22 kV distribution network are also analysed to validate this FLISR approach. As a result, the novel FLISR approach has the ability to identify effectively the over-reaching of OC relays, indicate a mis-coordination risk of adjacent protection devices on the same feeder, and get the total processing time of fault detection, location and isolation as well as ranking all possible service restoration plans in distribution network at less than two minutes.

Simulation Analysis for the Impact of Voltage Distribution of Distribution System with Distributed Generation

2013 ◽  
Vol 732-733 ◽  
pp. 936-940
Author(s):  
Si Qing Sheng ◽  
Lin Tao Fan ◽  
Xiao Lin Tan
Keyword(s):  
Wind Power ◽  
Distributed Generation ◽  
Distribution System ◽  
Simulation Analysis ◽  
Distribution Network ◽  
Power Network ◽  
Voltage Distribution ◽  
The Impact

From the angle of voltage distribution, the influence of DG on power network was studied, various access position and access capacity of DG were analyzed, and conclusion can be drew that DG can help optimize the voltage distribution in the power network. Besides, the output of photovoltaic and wind power was characterized by varying with time, and based on that, the voltage distribution was simulated when they were both connected in the same distribution network. According to the simulation result, some valuable principles and necessary procedures have been proposed.

scholarly journals Quality of Service and Economic Assessment of a MV Distribution Network Fault Locator

2018 ◽  
Vol 3 (3) ◽  
pp. 48-52
Author(s):  
João Silva
Keyword(s):  
Distribution System ◽  
Fault Location ◽  
Distribution Network ◽  
Economic Assessment ◽  
Fault Isolation ◽  
Time Saving ◽  
Medium Voltage ◽  
Different Characteristics ◽  
Network Fault

The fault management process consists of several sub-tasks: fault location, fault isolation and service restoration. This work presents an assessment and evaluation of the practical aspects of the Medium Voltage (MV) Fault Locator at the Portuguese Distribution System primary substation. Eighty samples of incidents occurred at different MV network with different characteristics in Portugal were used to determine the time saving on the restoration process as well as the improvement on the quality of services indices. An economical assessment based of the use of the MV Distribution Network Fault Locator available in the Portuguese Primary Substation was done and discussed.

scholarly journals Exploring the impact of urbanization on consumer goods distribution networks

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Florian Kellner
Keyword(s):  
Consumer Goods ◽  
Distribution System ◽  
Distribution Network ◽  
Distribution Networks ◽  
Content Type ◽  
Minimal Network ◽  
Performance Effects ◽  
Distribution Logistics ◽  
Impact Of Urbanization ◽  
The Impact

PurposeDue to the growing percentage share of urban dwellers, the physical distribution of products faces altering conditions. This research explores the effects that urbanization has on the performance of a fast-moving consumer goods distribution network. A focus is set on changes in distribution cost, the cost-minimal network design, and greenhouse gas emissions.Design/methodology/approachThe analyses are based on a quantitative distribution network model of an existing manufacturer of consumer goods.FindingsThe results indicate that the foreseen population shift will affect the network's economic and environmental performance. Effects are, among others, due to differences in the efficiency of supplying urban and nonurban regions. The combined effects of urbanization and the development of the population size will even more affect the network's performance.Originality/valueResearch dealing with distribution logistics and urbanization primarily focuses on city logistics. In this paper, the object of analysis is the entire distribution system.

scholarly journals Evaluation of Distributed Generation Impact on Reliability of a Distribution System using DIg SILENT Power Factory

2020 ◽  
Vol 9 (10) ◽  
pp. 381-389
Keyword(s):  
Distributed Generation ◽  
System Reliability ◽  
Distribution System ◽  
Distribution Systems ◽  
Distribution Network ◽  
Simulation Method ◽  
Green Energy ◽  
Reliability Indices ◽  
Distribution System Reliability ◽  
The Impact

As an effective supplement to the centralized fossil fuel based traditional generation, Distributed Generation (DG) has become an effective alternative choice and has been rapidly increasing since past few years due to growing demand for electricity and the new policies of governing bodies for usage of green energy. In overall power system, distribution systems are more vulnerable to faults and reliability aspects of such systems becomes an important issue. With higher penetration of DG into the distribution network, it will be necessary to study the impact of such generation on the various aspects of distribution system. Thus, increase in rate of penetration DGs into the distribution system on one side and increased faults in distribution network on another side, will make the study of impact of DG integration on distribution system reliability an interesting topic of research. The present work focuses on evaluation of impacts of integration of such DGs on reliability of local distribution network, typically in an urban scenario By using the simulation method using DIgSILENT PowerFactory software, the impacts of integration of DG in terms of enhancement in distribution system reliability indices and reduction in system losses for different scenarios are studied and presented in this paper. Based on the simulation results obtained and after analysis of the distribution system, overall results are summarized by focusing on the installation of suitable capacity of DG and the location of DG which are important factors affecting the system losses and system reliability indices.

scholarly journals Self-Healing Besides Restoration Methods in Smart Grid Distribution Networks

2020 ◽  
Vol 9 (6) ◽  
pp. 1123-1128
Keyword(s):  
Smart Grid ◽  
Power System ◽  
Distribution System ◽  
New Technologies ◽  
Distribution Networks ◽  
Grid Technology ◽  
Self Healing ◽  
Smart Grid Communications ◽  
Power Restoration ◽  
Smart Grid Technology

The Smart grid refers to a next-generation power grid which is a two-way information flow where electricity and information switch over between the service and its customer’s. The power system becomes smart by applying intelligence by way of multidirectional flow of electricity and information to create an extensive distribution network through smart grid technology. It made smarter power system by developing a networking communication, controls, automation, new technologies and tools working together to make the great efficient and more secure environment. For an effective integration and quality of the service to the consumer's smart grid technology is needed due to working with the electrical distribution system and quickly to respond digitally for rapidly changing electric demand. At this point, an electricity disruption such as a blackout can affect a series of failures that can affect several areas such as banking, traffic, and security. To address the power restoration, smart grid makes use of self-healing strategy which will allow automatic switching when equipment failure or outages occur. There have been numerous studies in the last decade or so in to even out the fundamental and mathematical challenges of making a smart self-healing grid a reality. In this paper, we explore the Selfhealing approach for Smart grid Communications likewise discusses the service restoration methods in Distribution Networks of Smart Grid Environment

scholarly journals Investigation of The DGs Effect on The Coordination Between Protective Elements in Distribution Network

2019 ◽  
Vol 7 (4) ◽  
pp. 227-237
Author(s):  
Abdallah Reda ◽  
Prof. M.Farahat ◽  
Prof. Amal F.Abdelgawad ◽  
Associate Prof. A.T.M Taha
Keyword(s):  
Distribution System ◽  
Power Flow ◽  
Power Transformer ◽  
Short Circuit ◽  
Distribution Network ◽  
Voltage Profile ◽  
Electric Network ◽  
Protective Devices ◽  
Additional Costs ◽  
The Impact

Addition of Distributed Generators (DGs) to the electric network have more advantages to the network. It improves the voltage profile and the power flow in the network. In the last decade, DGs is used in power system, especially the distribution system. Coordination study for protective devices must be performed on the distribution network with DGs to reach selectivity with minimum clearance time of fault. Due to DG insertion to the electric system, the short circuit level is changed and coordination between protective elements should be done. This paper presents a technique to avoid the miscoordination problem between protective devices due to the impact of DG units insertion without any additional costs. The proposed technique depend on activating and updating the setting of network relays to achieve correct coordination. Also, it doesn't need any additional costs or any additional equipement to be installed in the electric network. This paper make studies on a real radial system of power transformer with its feeders of a 66kV utility substation before and after adding DGs. ETAP software is used to simulate the network under study.

Development and Application of Smart Distribution Grid Self-Healing Control System

2014 ◽  
Vol 960-961 ◽  
pp. 828-831
Author(s):  
Shan Shan Li ◽  
Hong Dan Li ◽  
Hui Quan Zou ◽  
Yao Qiang Liu ◽  
Xiang He
Keyword(s):  
Fault Location ◽  
Fault Isolation ◽  
Risk Prevention ◽  
Self Healing ◽  
Distribution Grid ◽  
High Quality ◽  
Operation Optimization ◽  
Safety Warning ◽  
Power Restoration ◽  
Smart Distribution Grid

Self-healing is an important feature of smart distribution grid. Self-healing control for smart distribution grid covers risk prevention and operation optimization before accidents, in addition, it covers fault location, fault isolation and power restoration. The research of self-healing control theory, risk assessment, fault diagnosis and safety warning for smart distribution grid provides technical supports to help build a safe, reliable, efficient, high-quality, flexible and compliant smart distribution grid.

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