scholarly journals New Method for OC Relay Coordination

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Ameer Aqeel Kamoona ◽  
Ahmed Najm alfadli ◽  
Israa Ali Alshabeeb
Keyword(s):  
Circuit Breaker ◽  
Object Oriented ◽  
Simulation Software ◽  
Software Environment ◽  
Relay Coordination ◽  
Feeder Bus ◽  
The Status ◽  
Communication Capability ◽  
Numerical Relay ◽  
Design And Manufacture

Protection relays design and manufacture have arrived to a new level of advancement; hence, numerical relays have appeared recently. They combine all the functions of monitoring, control, and protection in one device. Also these relays have the ability to communicate with each other to share statuses and orders using GOOSE (generic object‐oriented substation events) messages based on communication protocols such as IEC61850. In this paper, a proposed method for overcurrent (OC) relay coordination has been introduced based on numerical relay features of several setting groups and communication capability. This work supposes that the coordination between feeder, bus section, and incomer protection relays, in a substation of single busbar configuration with bus sectionalizer (i.e., bus section), depends on the status of the bus section circuit breaker (CB) as a criterion for determining active relay setting group, to achieve a faster tripping action. ETAP has been used as a simulation software environment. And the simulation results show the advantages of the proposed method in reducing the time needed by the relay to clear the electrical fault. Siemens SIPROTEC series have been used as an example of numerical relays, specifically 7SJ64 as OC relay, which exists in the ETAP library.

scholarly journals Upgrade of CMS Full Simulation for Run 2

2019 ◽  
Vol 214 ◽  
pp. 02012
Author(s):  
Vladimir Ivanchenko ◽  
Sunanda Banerjee
Keyword(s):  
Monte Carlo ◽  
Simulation Software ◽  
Pixel Detector ◽  
Test Beam ◽  
Hadronic Calorimeter ◽  
Cms Detector ◽  
The Status ◽  
Full Simulation

We report on the status of the CMS full simulation software for Run 2 operations of the LHC. Initially, Geant4 10.0p02 was used and about 16 billion events were produced for analysis of 2015-2016 data. In 2017, the CMS detector was updated with a new tracking pixel detector, a modified hadronic calorimeter electronics, and extra muon detectors added. Corresponding modifications were introduced in the full simulation and Geant4 10.2p02 was adopted for 2017 simulation productions; that includes an improved Geant4 for multi-threaded mode, which became the default for 2017. For the 2018 Monte Carlo productions, the full simulation has been updated further. The new Geant4 version 10.4 is used, adopted for the production after detailed validations using test-beam and collision data. The results of validations will be described in details. Several aspects of the migration to Geant4 10.4 and modifications in CMSSW simulation software will be also discussed.

scholarly journals Solid-State DC Circuit Breakers and their Comparison in Modular Multilevel Converter Based-HVDC Transmission System

Electronics ◽  
2021 ◽  
Vol 10 (10) ◽  
pp. 1204
Author(s):  
Gul Ahmad Ludin ◽  
Mohammad Amin Amin ◽  
Hidehito Matayoshi ◽  
Shriram S. Rangarajan ◽  
Ashraf M. Hemeida ◽  
...  
Keyword(s):  
Solid State ◽  
High Voltage ◽  
Direct Current ◽  
Circuit Breaker ◽  
Transmission System ◽  
Simulation Software ◽  
Fault Current ◽  
Circuit Breakers ◽  
Hvdc Transmission ◽  
Dc Circuit Breakers

This paper proposes a new and surge-less solid-state direct current (DC) circuit breaker in a high-voltage direct current (HVDC) transmission system to clear the short-circuit fault. The main purpose is the fast interruption and surge-voltage and over-current suppression capability analysis of the breaker during the fault. The breaker is equipped with series insulated-gate bipolar transistor (IGBT) switches to mitigate the stress of high voltage on the switches. Instead of conventional metal oxide varistor (MOV), the resistance–capacitance freewheeling diodes branch is used to bypass the high fault current and repress the over-voltage across the circuit breaker. The topology and different operation modes of the proposed breaker are discussed. In addition, to verify the effectiveness of the proposed circuit breaker, it is compared with two other types of surge-less solid-state DC circuit breakers in terms of surge-voltage and over-current suppression. For this purpose, MATLAB Simulink simulation software is used. The system is designed for the transmission of 20 MW power over a 120 km distance where the voltage of the transmission line is 220 kV. The results show that the fault current is interrupted in a very short time and the surge-voltage and over-current across the proposed breaker are considerably reduced compared to other topologies.

scholarly journals Solution of Bottlenecks in the Logistics Flow by Applying the Kanban Module in the Tecnomatix Plant Simulation Software

2021 ◽  
Vol 13 (14) ◽  
pp. 7989
Author(s):  
Miriam Pekarcikova ◽  
Peter Trebuna ◽  
Marek Kliment ◽  
Michal Dic
Keyword(s):  
Lean Manufacturing ◽  
Business Processes ◽  
Software Tool ◽  
Transportation Systems ◽  
Simulation Software ◽  
Simulation Methods ◽  
Software Environment ◽  
Production Logistics ◽  
Pull System ◽  
Plant Simulation

The presented article deals with the issue of solving bottlenecks in the logistics flow of a manufacturing company. The Tx Plant Simulation software tool is used to detect bottlenecks and deficiencies in the company’s production, logistics and transportation systems. Together with the use of simulation methods and lean manufacturing tools, losses in business processes are eliminated and consequently flow throughput is improved. In the TX Plant Simulation software environment, using Bottleneck analyzer, bottlenecks were defined on the created simulation model and a method of optimizing logistics flows was designed and tested by introducing the Kanban pull system. This resulted in an improvement and throughput of the entire logistics flow, a reduction in inter-operational stocks and an increase in the efficiency of the production system as a whole.

Modeling of a Steam Turbine Including Partial Arc Admission for Use in a Process Simulation Software Environment

2011 ◽  
Author(s):  
Eric Liese
Keyword(s):  
Steam Turbine ◽  
Process Simulation ◽  
Process Model ◽  
Constant Pressure ◽  
Pressure Ratio ◽  
Simulation Software ◽  
State Variables ◽  
Steam Turbines ◽  
Software Environment ◽  
Last Stage

A dynamic process model of a steam turbine, including partial arc admission operation, is presented. Models were made for the first stage and last stage, with the middle stages presently assumed to have a constant pressure ratio and efficiency. A condenser model is also presented. The paper discusses the function and importance of the steam turbines entrance design and the first stage. The results for steam turbines with a partial arc entrance are shown, and compare well with experimental data available in the literature, in particular, the “valve loop” behavior as the steam flow rate is reduced. This is important to model correctly since it significantly influences the downstream state variables of the steam, and thus the characteristic of the entire steam turbine, e.g., state conditions at extractions, overall turbine flow, and condenser behavior. The importance of the last stage (the stage just upstream of the condenser) in determining the overall flowrate and exhaust conditions to the condenser is described and shown via results.

scholarly journals Dynamic Integration and Management of Opportunistic Resources for HEP

2019 ◽  
Vol 214 ◽  
pp. 08009 ◽  
Author(s):  
Matthias J. Schnepf ◽  
R. Florian von Cube ◽  
Max Fischer ◽  
Manuel Giffels ◽  
Christoph Heidecker ◽  
...  
Keyword(s):  
High Performance ◽  
High Energy Physics ◽  
Job Scheduling ◽  
High Energy ◽  
Software Environment ◽  
Resource Manager ◽  
Network Bandwidth ◽  
The Status ◽  
Single Entry ◽  
Institute Of Technology

Demand for computing resources in high energy physics (HEP) shows a highly dynamic behavior, while the provided resources by the Worldwide LHC Computing Grid (WLCG) remains static. It has become evident that opportunistic resources such as High Performance Computing (HPC) centers and commercial clouds are well suited to cover peak loads. However, the utilization of these resources gives rise to new levels of complexity, e.g. resources need to be managed highly dynamically and HEP applications require a very specific software environment usually not provided at opportunistic resources. Furthermore, aspects to consider are limitations in network bandwidth causing I/O-intensive workflows to run inefficiently. The key component to dynamically run HEP applications on opportunistic resources is the utilization of modern container and virtualization technologies. Based on these technologies, the Karlsruhe Institute of Technology (KIT) has developed ROCED, a resource manager to dynamically integrate and manage a variety of opportunistic resources. In combination with ROCED, HTCondor batch system acts as a powerful single entry point to all available computing resources, leading to a seamless and transparent integration of opportunistic resources into HEP computing. KIT is currently improving the resource management and job scheduling by focusing on I/O requirements of individual workflows, available network bandwidth as well as scalability. For these reasons, we are currently developing a new resource manager, called TARDIS. In this paper, we give an overview of the utilized technologies, the dynamic management, and integration of resources as well as the status of the I/O-based resource and job scheduling.

scholarly journals Sistem Pendanaan Proyek Perusahaan Jasa Konstruksi Berbasis Web

2021 ◽  
Vol 6 (3) ◽  
pp. 121
Author(s):  
Hilyah Magdalena ◽  
Hadi Santoso ◽  
Litha Leonita
Keyword(s):  
Information System ◽  
Financial Management ◽  
System Development ◽  
Object Oriented ◽  
Project Finance ◽  
Web Based ◽  
Construction Company ◽  
Finance Management ◽  
The Status ◽  
Financial Management System

CV. Yusti Karya as a construction company realizes that the ability to manage project finances is an important requirement for smooth project management. CV.Yusti Karya often has to manage several projects simultaneously in remote locations. This condition makes it difficult for the finance staff in the office to manage project financial allocations and also makes it difficult for project managers in the field and must report the status of project expenditures to the office. This difficulty drives CV. YustiKarya improved the project's financial management system from using spreadsheets to a web-based information system. Web-based information system will be developed using object-oriented methods. The object- oriented system development method was chosen because of its modular development capabilities and adapts to system requirements. The development of this system aims to enable Person in Charge (PIC) projects in the field to submit expenditures and can be immediately approved by the financial staff in charge. Online project finance management between project PICs and finance staff helps harmonize financial management. The Director can monitor the flow of the latest project finance developments online.

Research on the Design and Realization of Electrical Training System Based on the Virtual Reality Technology

2014 ◽  
Vol 998-999 ◽  
pp. 1753-1756 ◽  
Author(s):  
Bao Zhen Feng
Keyword(s):  
Virtual Reality ◽  
Interface Design ◽  
Training System ◽  
Simulation Software ◽  
Virtual Reality Technology ◽  
Computer Technique ◽  
Training Project ◽  
Modern Computer ◽  
Database Technology ◽  
Design And Manufacture

This paper is mainly about the process of design and realization of electrical training software based on the virtual reality technology. Some modern computer technique are used in this paper, such as, interface design technology, animation design and manufacture technology, 3D modeling and rendering technology, virtual reality technology, network technology, database technology and the Man-machine interface sensor and communication technology. The electrical technique skill education in occupation post analysis, training project and key information extraction, the analysis of the teaching object have been realized. The overall structure of the system design, media design, copy and script writing have been accomplished. The virtual reality simulation software for technique training introduced in this paper has the characteristics of strong professionalism, situations, procedural, interactivity and intelligence. It is more realistic, more manufacturability and more interactivity than the traditional simulation teaching software. Therefore, it can achieve better teaching training effects. Furthermore it has common hardware training equipment incomparable advantages.

Research on Dynamic Alignment for Sophisticated System Based on ACP Technology

2012 ◽  
Vol 630 ◽  
pp. 473-478 ◽  
Author(s):  
Fei Wan ◽  
Guo Xi Li ◽  
Jing Zhong Gong ◽  
Bao Zhong Wu
Keyword(s):  
Experimental Data ◽  
Dynamic Simulation ◽  
Process Parameters ◽  
Simulation Software ◽  
Contact Theory ◽  
Dynamic Parameters ◽  
Agent Model ◽  
The Status ◽  
Alignment Process ◽  
Dynamic Alignment

To change the status of time-consuming and over-reliance on technicians in mechanical system alignment process, the ACP technology is presented. The mapping between alignment process parameters and dynamic parameters was established through contact theory to build the agent model for parts. While the second mapping between dynamic parameters and machine dynamic characteristics is calculated by dynamic simulation software to conduct computational experiments. Experimental data is analyzed in order to implement data mine, optimize the alignment process, guide technician alignment, modify the theory mapping and improve the alignment efficiency.

A Comprehensive Overview of the Applications of Artificial Life

2006 ◽  
Vol 12 (1) ◽  
pp. 153-182 ◽  
Author(s):  
Kyung-Joong Kim ◽  
Sung-Bae Cho
Keyword(s):  
Computer Graphics ◽  
Artificial Life ◽  
Simulation Software ◽  
Natural Phenomenon ◽  
Comprehensive Overview ◽  
Agent Based ◽  
Artificial Immune Network ◽  
The Status ◽  
Internet Information ◽  
Application Fields

We review the applications of artificial life (ALife), the creation of synthetic life on computers to study, simulate, and understand living systems. The definition and features of ALife are shown by application studies. ALife application fields treated include robot control, robot manufacturing, practical robots, computer graphics, natural phenomenon modeling, entertainment, games, music, economics, Internet, information processing, industrial design, simulation software, electronics, security, data mining, and telecommunications. In order to show the status of ALife application research, this review primarily features a survey of about 180 ALife application articles rather than a selected representation of a few articles. Evolutionary computation is the most popular method for designing such applications, but recently swarm intelligence, artificial immune network, and agent-based modeling have also produced results. Applications were initially restricted to the robotics and computer graphics, but presently, many different applications in engineering areas are of interest.

Research on 3C Integrated System of CBN Turning Tool for Small and Medium-Sized Enterprises

2010 ◽  
Vol 42 ◽  
pp. 91-94
Author(s):  
Nan Bo Liu ◽  
Zhao Yun Wu ◽  
Gang Yan Li ◽  
Shu Long Hu ◽  
Cheng Lin Yang
Keyword(s):  
System Integration ◽  
Cutting Tools ◽  
Object Oriented ◽  
Integrated System ◽  
Application Layer ◽  
Class Model ◽  
Information System Integration ◽  
Data Layer ◽  
Design And Manufacture ◽  
Hard Cutting

In view of the problems and difficulties in the information system integration of the small and medium-sized super-hard cutting tools enterprises, the characteristics of the design and manufacture of the CBN turning tool were analyzed. The demand of the enterprises for the 3C integrated system of CBN turning tool was presented. The 3-layer architecture of the 3C integrated system of CBN turning tool was proposed, which included the data layer, the application layer and the user layer. The object-oriented method was adopted to design the system and the class model of the system was constructed. Based on these, the 3C integrated system of CBN turning tool for small and medium-sized enterprises was developed. The key technologies of the system were put forward. The system had been applied to the enterprise and run well.

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