Auto-transformer and magnetic control soft start method of super large capacity and high voltage motor considering the cost and performance optimization

2018 ◽  
Author(s):  
J. Yuan ◽  
C. Wang ◽  
Y. Zhu ◽  
H. Zhou ◽  
L. Wei ◽  
...  
Keyword(s):  
High Voltage ◽  
Performance Optimization ◽  
Magnetic Control ◽  
Large Capacity ◽  
Soft Start ◽  
And Performance ◽  
The Cost

scholarly journals Coupled autotransformer and magnetic‐control soft‐start method for super‐large‐capacity high‐voltage motors

High Voltage ◽  
2020 ◽  
Vol 5 (1) ◽  
pp. 38-45
Author(s):  
Jiaxin Yuan ◽  
Chuansheng Wang ◽  
Shan Yin ◽  
Liangliang Wei ◽  
Kazuhiro Muramatsu ◽  
...  
Keyword(s):  
High Voltage ◽  
Magnetic Control ◽  
Large Capacity ◽  
Soft Start

scholarly journals Converting existing transmission corridors to HVDC is an overlooked option for increasing transmission capacity

2019 ◽  
Vol 116 (28) ◽  
pp. 13879-13884 ◽  
Author(s):  
Liza Reed ◽  
M. Granger Morgan ◽  
Parth Vaishnav ◽  
Daniel Erian Armanios
Keyword(s):  
High Voltage ◽  
Lower Cost ◽  
Optimal Solution ◽  
High Voltage Direct Current ◽  
Right Of Way ◽  
Electricity System ◽  
And Topology ◽  
Cost Strategy ◽  
And Performance ◽  
The Cost

A changing generation mix and growing demand for carbon-free electricity will almost certainly require dramatic changes in the infrastructure and topology of the electricity system. Rather than build new lines, one way to minimize social opposition and regulatory obstacles is to increase the capacity of existing transmission corridors. In addition to upgrading the capacity of high-voltage alternating current (HVAC) lines, we identify a number of situations in which conversion from HVAC to high-voltage direct current (HVDC) is the least-cost strategy to increase the capacity of the corridor. If restricted to the existing right-of-way (ROW), we find DC conversion to be the least-cost, and in some cases the only, option for distances of >200 km or for increases of >50% capacity. Across all configurations analyzed, we assess HVDC conversion to be the lower-cost option at >350 km and >50% capacity increases. While we recognize that capacity expansion through HVDC conversion may be the optimal solution in only some situations, with future improvements in the cost and performance of solid-state power electronics, conversion to HVDC could be attractive in a growing set of circumstances.

scholarly journals COST SIMULATION AND PERFORMANCE OPTIMIZATION OF WEB-BASED APPLICATIONS ON MOBILE CHANNELS

2006 ◽  
Vol 16 (05) ◽  
pp. 655-676
Author(s):  
MATTHIAS BOOK ◽  
VOLKER GRUHN ◽  
MALTE HÜLDER ◽  
ANDRÉ KÖHLER ◽  
ANDREAS KRIEGEL
Keyword(s):  
Performance Optimization ◽  
Response Times ◽  
Mobile Network ◽  
Time Data ◽  
Web Based ◽  
Log Files ◽  
Mobile Channel ◽  
And Performance ◽  
Time Required ◽  
The Cost

When considering the addition of a mobile presentation channel to an existing web-based application, a key question that has to be answered even before development begins is how the mobile channel's characteristics will impact the user experience and the cost of using the application. If either of these factors is outside acceptable limits, economical considerations may forbid adding the channels, even if it would be feasible from a purely technical perspective. Both of these factors depend considerably on two metrics: The time required to transmit data over the mobile network, and the volume transmitted. The PETTICOAT method presented in this paper uses the dialog flow model and web server log files of an existing application to identify typical interaction sequences and to compile volume statistics, which are then run through a tool that simulates the volume and time that would be incurred by executing the interaction sequences on a mobile channel. From the simulated volume and time data, we can then calculate the cost of accessing the application on a mobile channel, and derive suitable approaches for optimizing cost and response times.

scholarly journals Modeling and Optimization of Soft Start-Up for Hydroviscous Drive Applied to Scraper Conveyor

2019 ◽  
Vol 2019 ◽  
pp. 1-13
Author(s):  
Long Li ◽  
Hongwei Cui ◽  
Zisheng Lian ◽  
Qiliang Wang
Keyword(s):  
Objective Function ◽  
Performance Optimization ◽  
Evaluation System ◽  
Simulated Annealing Algorithm ◽  
Analytic Hierarchy ◽  
Soft Start ◽  
Start Up ◽  
Scraper Conveyor ◽  
And Performance ◽  
The Mathematical Model

To improve the soft start-up performance of a scraper conveyor under different working conditions, the mathematical model of the torque for controllable starting transmission was established. The influences of start-up time, load values, and moment of inertia on the soft start-up characteristics of a scraper conveyor are analyzed. Based on the analytic hierarchy process (AHP), the new evaluation system of soft start-up optimization for hydroviscous drive applied to a scraper conveyor is proposed. Through the joint simulation platform of MATLAB and Isight, the two-parameter control model for soft start-up time is established using the method of experimental design and simulated annealing algorithm. The optimal start-up time under different conditions is determined, and soft start-up is optimized. The results show that with increasing start-up time, the objective function value of soft start-up performance decreases first and then increases. Under different flywheel inertia and load conditions, there is an optimal start-up time that minimizes the objective function for better soft start-up performance. The optimal start-up time decreases with increasing load, and the optimal start-up time decreases monotonically with the input flywheel inertia. This research provides a new method and theoretical basis for the modeling and performance optimization of soft start-up for hydroviscous drive applied to a scraper conveyor.

scholarly journals A novel soft start method of super large capacity high voltage motor

2019 ◽  
Vol 3 (3) ◽  
pp. 302-308 ◽  
Author(s):  
Jiaxin Yuan ◽  
Chuansheng Wang ◽  
Yong Zhu ◽  
Baichao Chen
Keyword(s):  
High Voltage ◽  
Large Capacity ◽  
Soft Start

scholarly journals Study on the soft-start process of PSM high voltage power supply for ECRH

2019 ◽  
Vol 203 ◽  
pp. 04019
Author(s):  
Jian Zhang ◽  
Rui Guan ◽  
Fei Guo ◽  
Yu Zhou ◽  
Haozhang Sun ◽  
...  
Keyword(s):  
Theoretical Analysis ◽  
High Voltage ◽  
Power Supply ◽  
Process Analysis ◽  
Equivalent Circuit Model ◽  
Performance Comparison ◽  
High Voltage Power Supply ◽  
Soft Start ◽  
And Performance ◽  
Start Process

The soft-start process of high voltage power supply (HVPS) based on pulse step modulation (PSM) for ECRH on EAST is introduced, which is the first procedure of system operation. The response process is detailed by proposing DC equivalent circuit model, process analysis and performance comparison is given under the conditions of different soft-start resistor parameters, and the theoretical analysis is proved by the simulation package ANSYS Simplorer simulations. The soft-start resistor is designed for the HVPS of 140GHz ECRH system for a smooth charging without overshoot of the capacitor[6], and the final experimental results show that it is in agreement with the theoretical analysis and is stable and reliable to the power devices.

Return on Invesment (ROI) of Software Product: A Systematic Literature Review

2015 ◽  
Vol 6 (1) ◽  
pp. 50-57
Author(s):  
Rizqa Raaiqa Bintana ◽  
Putri Aisyiyah Rakhma Devi ◽  
Umi Laili Yuhana
Keyword(s):  
Return On Investment ◽  
Assessment Criteria ◽  
Software Product ◽  
And Performance ◽  
Rational Consideration ◽  
Actual Return ◽  
The Cost ◽  
Investment Models ◽  
The Impact

The quality of the software can be measured by its return on investment. Factors which may affect the return on investment (ROI) is the tangible factors (such as the cost) dan intangible factors (such as the impact of software to the users or stakeholder). The factor of the software itself are assessed through reviewing, testing, process audit, and performance of software. This paper discusses the consideration of return on investment (ROI) assessment criteria derived from the software and its users. These criteria indicate that the approach may support a rational consideration of all relevant criteria when evaluating software, and shows examples of actual return on investment models. Conducted an analysis of the assessment criteria that affect the return on investment if these criteria have a disproportionate effort that resulted in a return on investment of a software decreased. Index Terms - Assessment criteria, Quality assurance, Return on Investment, Software product

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