The Design and Implementation of the Power Distribution Unit in Campus Intelligent Computer Room

2015 ◽  
Vol 736 ◽  
pp. 173-178
Author(s):  
Mei Mei Wu
Keyword(s):  
Power Supply ◽  
Power Distribution ◽  
Distribution System ◽  
Energy Usage ◽  
Power Distribution System ◽  
Line Frequency ◽  
Design And Implementation ◽  
Modern Computer ◽  
Intelligent Computer

This paper described a kind of designation method to the power distribution system in the modern computer room .Compared with the traditional power supply socket, The Power Distribution Unit (PDU) with these functions whichcan monitor the RMS current and voltage, line frequency ,energy usage ,load limitation and the relay controlling to current leak ,over load or over current etc., There also has the wired RS-485and reserved the wireless WIFI interfaces in the PDU through which the working conditionsof equipment in the computer room can be connected and monitored by administrator at any time and place.

scholarly journals Power distribution system fault monitoring device for supply networks in Nigeria

2019 ◽  
Vol 9 (4) ◽  
pp. 2803
Author(s):  
Olalekan Kabiru Kareem ◽  
Aderibigbe Adekitan ◽  
Ayokunle Awelewa
Keyword(s):  
Power Supply ◽  
Power Distribution ◽  
Distribution System ◽  
Low Voltage ◽  
Copper Wire ◽  
Low Cost ◽  
Monitoring Device ◽  
Power Distribution System ◽  
Fault Monitoring ◽  
Quick Service

Electric power is the bedrock of our modern way of life. In Nigeria, power supply availability, sufficiency and reliability are major operational challenges. At the generation and transmission level, effort is made to ensure status monitoring and fault detection on the power network, but at the distribution level, particularly within domestic consumer communities there are no fault monitoring and detection devices except for HRC fuses at the feeder pillar. Unfortunately, these fuses are sometimes replaced by a copper wire bridge at some locations rendering the system unprotected and creating a great potential for transformer destruction on overload. This study is focused on designing an on-site power system monitoring device to be deployed on selected household entry power cables for detecting and indicating when phase off, low voltage, high voltage, over current, and blown fuse occurs on the building’s incomer line. The fault indication will help in reducing troubleshooting time and also ensure quick service restoration. After design implementation, the test result confirms design accuracy, device functionality and suitability as a low-cost solution to power supply system fault monitoring within local communities.

Design of Safty Network and Power Distribution of Underground Shops of Suqian Powerlong City Plaza

2012 ◽  
Vol 174-177 ◽  
pp. 3013-3017
Author(s):  
Shou Jun Li ◽  
Xiao Ping Ma ◽  
Hong Yu
Keyword(s):  
Power Supply ◽  
Power Distribution ◽  
Distribution System ◽  
Power Loss ◽  
Supply Network ◽  
Power Distribution System ◽  
Network Characteristics ◽  
Profibus Dp ◽  
Empirical Design ◽  
Network Power

This paper focuses on two main aspects including building safty and energy saving of power distribution system. First of all, BACnet protocol based network characteristics of safty system of underground shops of the Suqian powerlong City Plaza is introduced. And then the fieldbus control network which centers around world well-known PLC such as AB ControlLogix, Siemens S7-300 and Siemens S7-400 is mainly adopted in the design of fire linkage system. ControNet network connects to PROFIBUS network by PD-100S protocol convertor which can convert one protocol to another between DeviceNet and PROFIBUS-DP network. In the design of power supply network, power loss caculation of dry-type transformer is considered firstly, and then empirical design mistaken cognition of power supply network is analyzed and solution for improvement is presented.

Research on Spacecrafts Intelligent Power Distribution Technology

2012 ◽  
Vol 182-183 ◽  
pp. 436-439
Author(s):  
Kai Cui ◽  
Zhong Bo Dong ◽  
Bo Li
Keyword(s):  
Real Time ◽  
Power Supply ◽  
Power Distribution ◽  
Distribution System ◽  
Power Supply System ◽  
Supply System ◽  
Power Distribution System ◽  
Higher Power ◽  
Software And Hardware

The development of all kinds of spacecrafts is much smaller and more intelligent, integration increased constantly, one satellite can accomplish more and more expectant missions by using plenty of loads. As a result, higher power, higher reliability and much smarter power distribution system is needed to satisfy the growing quantity of loads. This paper presents the power supply system which characterized by loads observation real time, software and hardware combinational over current protection, bus communication with on board computer, the system has been validated in project and the conclusion has been proved accuracy and reliability.

scholarly journals Analysis of power factor corrections for obtaining improved power factors of switching mode power supply

2020 ◽  
Vol 9 (3) ◽  
pp. 826
Author(s):  
Dimov Stojce Ilcev
Keyword(s):  
Power Factor ◽  
Power Supply ◽  
Power Distribution ◽  
Distribution System ◽  
Power Factor Correction ◽  
Electric Energy ◽  
Electric Power System ◽  
Power Distribution System ◽  
Switching Mode Power Supply ◽  
Switching Mode

This article discusses such an important issue as the power factor of Switching Mode Power Supply (SMPS) and its improvement through Power Factor Correction (PFC). The power factor shows how effectively uses the consumption of electric energy by certain loads connected to the power distribution system with Alternative Current (AC), which is very critical for the electricity-producing industry. The number of power factors is a dimensionless value that can vary from -1 to 1. Thus, in an electric power system, a load with a low power factor draws more current than a load with a high power factor for the same amount of transferring useful power, which may cause overloading of the power grid and lead to over-expenditure of electricity. Otherwise, designing power factor correction (PFC) into modern switched-mode power supplies (SMPS) has evolved over the past few years due to the introduction of many new controller integrated circuits (IC). Today, it is possible to design a variety of PFC circuits with different modes of operation, each with its own set of challenges. As the number of choices has increased, so has the complexity of making the choice and then executing the new design. In this article, the design considerations and details of operation for the most popular approaches are provided.  

scholarly journals Optimization of a PV-Wind Hybrid Power Supply Structure with Electrochemical Storage Intended for Supplying a Load with Known Characteristics

Energies ◽  
2020 ◽  
Vol 13 (22) ◽  
pp. 6143
Author(s):  
Leszek Kasprzyk ◽  
Andrzej Tomczewski ◽  
Robert Pietracho ◽  
Agata Mielcarek ◽  
Zbigniew Nadolny ◽  
...  
Keyword(s):  
Energy Storage ◽  
Power Supply ◽  
Power Distribution ◽  
Distribution System ◽  
Energy Demand ◽  
Synthesis Method ◽  
Economic Indicator ◽  
Power Distribution System ◽  
Battery Capacity ◽  
Supply Reliability

An important aspect of the off-grid utilization of hybrid generation systems is the integration of energy storage facilities into their structures, which allows for improved power supply reliability. However, this results in a significant increase in the cost of such systems. Therefore, it is justified to use optimization resulting in the minimization of the selected economic indicator taking into account the most important technical constraints. For this reason, this work proposes an algorithm to optimize the structure of a hybrid off-grid power distribution system (with electrochemical energy storage), designed to supply a load with known daily energy demand. The authors recommend genetic algorithm utilization as well as a modified criterion for evaluating the quality of solutions based on the Levelized Cost of Energy (LCOE) index. Several technical and economic analyses were presented, including unit costs, power distribution of the wind and solar sections, nominal battery capacity, SSSI index (System Self-Sufficiency Index), etc. The model of the system includes durability of the elements which have a significant impact on the periodic battery replacement. The tests were carried out for two types of loads and two types of electrochemical batteries (NMC—Lithium Nickel Manganese Cobalt Oxide; and PbO2—Lead-Acid Battery), taking into account the forecast of an increased lifetime of NMC type batteries and decreasing their price within five years. The proposed synthesis method of photovoltaic-wind (PV-wind) hybrid off-line systems leads to limiting the energy capacity of electrochemical storages. Based on the analyses, the authors proposed recommended methods to improve (reduce) the value of the criterion index (LCOE) for PV-wind off-grid systems while maintaining the assumed level of power supply reliability.

Design and implementation of a power distribution system adopting overcurrent protection

2020 ◽  
Vol 124 (1281) ◽  
pp. 1789-1797
Author(s):  
M. Bekhti ◽  
M. Bensaada ◽  
M. Beldjehem
Keyword(s):  
Power Systems ◽  
Power System ◽  
Power Distribution ◽  
Distribution System ◽  
Electrical Power ◽  
Electrical Power System ◽  
Complete Evaluation ◽  
Power Distribution System ◽  
Design And Implementation ◽  
Overcurrent Protection

ABSTRACTOne of the most critical aspects of a small satellite is the electrical power system (EPS) since the electrical power is necessary for the satellite to operate correctly during its predefined lifetime. The electrical power system consists mainly of solar cells, batteries, voltage converters and protection circuits. The electrical power system is responsible of providing stable power to the rest of the satellite subsystems.In satellite electrical power systems, overcurrent protection is now becoming an important function handled by the power distribution module (PDM). This paper proposes a method to evaluate the suggested protection. With the proposed procedure we should be able to verify that every possible failure does not travel through the EPS and cause a fatal degradation of the electrical power system. This will allow a complete evaluation of functionality of the protection hardware.This paper discusses the design and implementation of the power distribution module (PDM) for the coming generation of small satellites for the Algerian Space Agency (ASAL). The design must provide a reliable protection for the subsystems from the overcurrent associated with a device failure.

scholarly journals ELECTRIC POWER DISTRIBUTION IN BULK SYSTEM ON BOARD BIG VESSELS

2019 ◽  
pp. 110-117
Author(s):  
Aleksej Vladimirovich Melikov
Keyword(s):  
Power Supply ◽  
Power Distribution ◽  
Distribution System ◽  
Power Plants ◽  
Medium Size ◽  
Phase System ◽  
Power Losses ◽  
High Voltage Power Supply ◽  
Power Distribution System ◽  
Bulk System

The article describes the schemes of the radial power distribution system of the bulk system on board big ships. Today, when the ship power plants have great capacity, it is found preferable to use a four-wire three-phase system that has a distributed neutral and is not connected to the ground, in which the linear voltage can be easily utilized. The main distribution network of medium voltage can be of a simple radial type with substations or additional distribution switchboards. The advantages of a simple radial scheme on board a large vessel include providing selective protection and using digital automation. The weak points are the impressive amount of protective and switching appliances, high cost, significant power losses, length of wires, and threat to the reliability of the vessel due to the main switchboard failure. A There is presented a multi-part radial chart, in which the number of circuits going from the main switchboard and devices in it is significantly reduced. This chart is considered more suitable for medium-size power plants on large vessels. The calculation was carried out at a steady state of the radial network, the sections and wires of power lines were determined. Power losses in transformers and power supplied to substation bus-lines have been calculated. Before selecting the wires it was recommended to calculate the current flowing through the circuit. The ship power supply with a bridge ring scheme has been considered. In the event of a failure, only a part of the generators and a half of energy will be available. There has been given a conditional division of the power systems with a bridge ring circuit on board into three main parts. A diagram of the high-voltage power supply from the shore is shown. One of the main advantages of this technology is environmentally friendly nature of electricity produced by power plants on the coast, compared to the ship diesel engines running on burner fuel. This technology reduces pollution and improves air quality in port areas.

scholarly journals Protection Coordination Method Using Symmetrical Components in Loop Distribution System

Energies ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 4947
Author(s):  
Jung-Hun Lee ◽  
Woo-Hyun Kim ◽  
Hak-Ju Lee ◽  
Jun-Oh Kim ◽  
Woo-Kyu Chae
Keyword(s):  
Information And Communication Technologies ◽  
Power Supply ◽  
Power Distribution ◽  
Distribution System ◽  
Power Flow ◽  
System Analysis ◽  
Fault Current ◽  
Distributed Resources ◽  
Power Distribution System ◽  
Protection Method

Power utilities worldwide commonly use the radial distribution system because of its advantages of being simple in structure and having relatively inexpensive installation costs. It has a disadvantage in that its power supply reliability is low because the load side of the fault section will suffer from an outage in the event of a fault in the system. However, recently, with ICT (Information and Communication Technologies) development, system reliability is required to be high as the outage-susceptible loads increase. In addition, the increase in the connection of distributed resources such as renewable energy and electric vehicles is making it impossible to predict the power flow and reducing line utilization. Therefore, a loop power distribution system is proposed as a measure to solve this problem. Because all buses (nodes) in a loop distribution system have two or more power supply routes, they are more reliable than the radial system. It allows them to improve line utilization by connecting lines with different load peak times. However, in the case of a fault in the loop distribution system, the fault current is supplied from both directions, making it impossible to properly isolate the fault section with the protection method of the conventional distribution system. The permissive overreach transfer trip (POTT) method using communication to compensate for the limitations of conventional protection devices, and the other method using directional distance relay, is proposed. However, these methods operate by determining the direction of the fault current but have a disadvantage. It is difficult to detect a fault due to the effects of ground faults and distributed generation (DG) occurring in other lines. Therefore, in this paper, we propose a protection coordination algorithm that uses the negative-sequence component of voltage and current that occur when an unbalanced fault occurs, rather than the determination of the directionality and use of communication. To validate this, we configured a system using PSCAD/EMTDC (Manitoba Hydro International Ltd., Winnipeg, Manitoba, Canada), a system analysis program package and verified the results depending on the type of faults with the proposed algorithm.

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