Simulation Research on Influence of SVC Switching Overvoltage on Phase Controlled Reactor

2014 ◽  
Vol 602-605 ◽  
pp. 2966-2969
Author(s):  
Jun Min Li ◽  
Jiang Tao Li ◽  
Xin Yu ◽  
Shu Han Wang ◽  
Si Cong Wu
Keyword(s):  
Control Strategy ◽  
Natural Environment ◽  
Manufacturing Process ◽  
Research Institutions ◽  
Low Loss ◽  
Simulation Research ◽  
Switching Overvoltage ◽  
Transformer Substation ◽  
Step Down ◽  
At Home

In recent years, 66kV vertical TCR-type SVC was put into operation in several transformer substations at home. Compared to the compensation mode of the conventional 35kV SVC which is connected to 66kV busbar through by way of step-down transformer, the vertical compensation mode has the advantages of low loss and small maintenance amount. However, it is found that damage of phase controlled reactor in TCR happens in several scenes, and the technicians and research institutions studied this problem from such aspects as phase controlled reactor manufacturing process, SVC control strategy and natural environment of the transformer substations and obtained their own conclusions. This paper uses PSCAD software to conduct a simulation research on the 66kV vertical SVC system installed on a 220kV transformer substation at home and concluded that the SVC switching overvoltage might be the direct cause leading to damage of phase controlled reactor.

scholarly journals Creative Potential is Differentially Expressed in School, at Home, and the Natural Environment

2021 ◽  
Author(s):  
Mark Runco ◽  
Ahmed M. Abdulla Alabbasi ◽  
Selcuk Acar ◽  
ALaa Eldin A. Ayoub
Keyword(s):  
Natural Environment ◽  
Statistical Test ◽  
Differentially Expressed ◽  
Creative Activity ◽  
Creative Potential ◽  
Method Variance ◽  
Creative Products ◽  
The Individual ◽  
Home And School ◽  
At Home

Creative potential is one of the very most important topics for research. It is difficult to study because, unlike creative products, potential is by definition latent. There are several methods. One involves comparing creative activity expressed in various settings. Previous research has, for example, compared creativity expressed in school with that expressed by the same individuals when they are outside of school. There tends to be more creative activity outside of school, suggesting that the individual has creative potential, but it is only allowed to be expressed in certain settings. The present investigation extended this line of research by comparing creative activity in school, at home, and that occurring outside of school and home. Results indicated that the activity scores from the three settings shared less than 52% of their variance. The measures used were highly reliable, so the conclusion was that, as in previous research, various settings do indeed differentially allow the expression of creative potential. Comparisons of means also supported this finding. Interestingly, creative activity at home was significantly more common than creative activity at school and when outside of the home and school. A statistical test of method variance indicated that it was not a notable contribution nor confound. Limitations are discussed at the end of the manuscript.

Basic Simulation Study during the Process of Designing the Hybrid Power Train Equipped with Planetary Transmission

2013 ◽  
pp. 322-356
Keyword(s):  
Control Strategy ◽  
Electricity Consumption ◽  
System Optimization ◽  
Minimal Energy ◽  
Simulation Research ◽  
Power Train ◽  
Hybrid Power ◽  
Driving Cycles ◽  
Planetary Transmission ◽  
And Control

Chapter 9 is devoted to simulation research showing the influence of changes of the power train’s parameters and control strategy on the vehicle’s energy consumption, depending on different driving conditions. The control strategy role is to manage how much energy, frankly speaking, how much of the torque-speed relations referring to the power alteration, are flowing to or from each component. In this way, the components of the hybrid power train have to be integrated with a control strategy, and of course, with its energetic parameters to achieve the optimal design for a given set of constraints. The hybrid power train is very complex and non-linear to its every component. One effective method of system optimization is numerical computation, the simulation, as in the case of the multivalent suboptimal procedure regarding the number of electrical mechanical drive’s elements, whose simultaneous operation is connected with the proper energy flow control. The minimization of a power train’s internal losses is the target. The quality factor is minimal energy, as well as minimal fuel and electricity consumption. The fuel consumption by the hybrid power train has to be considered in relation to the conventional propelled vehicle. First of all, the commonly chosen statistic driving cycles should be taken into consideration. Unfortunately, this is not enough. The additional tests as for the vehicle’s climbing, acceleration, and power train behavior, referring to real driving situations, are strongly recommended during the drive design process.

scholarly journals Control Strategy and Performance Simulation Study on Extended Range Electric Vehicle

2019 ◽  
Vol 79 ◽  
pp. 03006
Author(s):  
Limian Wang ◽  
Shumao Wang ◽  
Zhenghe Song
Keyword(s):  
Electric Vehicle ◽  
Electric Vehicles ◽  
Control Strategy ◽  
Structure Design ◽  
System Structure ◽  
Simulation Research ◽  
Range Extender ◽  
Strategy Model ◽  
Extended Range ◽  
And Performance

Electric vehicles are recognized as an effective way to alleviate the energy crisis and environmental degradation, and extended range electric vehicles which have both the technical advantages of hybrid electric vehicles and pure electric vehicles, have gradually become a research hotspot in the automotive industry. In this paper, the system structure design of the extended range electric vehicle is carried out. On the basis of the pure electric vehicle, the engine and generator set are added. The control strategy model is established and the simulation research is carried out. The results show that the proposed control strategy model optimizes the working range of the range extender, takes into account the performance of the battery and the drive motor, and shows good tracking characteristics.

The Simulation Research of Synchronization Control Based on the Virtual Shaft Control and the Relative Coupling Control

2014 ◽  
Vol 1049-1050 ◽  
pp. 1111-1115 ◽  
Author(s):  
Huan Huan Shi ◽  
Xiao Wu ◽  
Liang Hua ◽  
Hong Gang Ji
Keyword(s):  
Control System ◽  
High Precision ◽  
Control Strategy ◽  
External Disturbance ◽  
Parameter Variation ◽  
Synchronization Control ◽  
Simulation Research ◽  
Synchronous Control ◽  
Synchronization Scheme ◽  
Main Spindle

Although the traditional synchronous control system for the virtual shaft has met the accuracy requirements of most products, it still can not fully meet the requirements, for the high precision, high synchronization control. This article proposed multi-motor synchronous control strategy based on the relative coupling control combined with virtual main spindle control, and built simulation platform by Matlab/Simulink and simulated the strategy. The simulation result shows that the synchronous control strategy mentioned in this article can overcome synchronization error brought by external disturbance and parameter variation. Moreover, it will better achieve the multi-motor synchronous control compared with the traditional virtual shaft synchronization scheme

Research on Predictive Current Control for Three-Level Four-Leg APF

2014 ◽  
Vol 1049-1050 ◽  
pp. 767-770
Author(s):  
Wen Bao Hou ◽  
De Lu Li
Keyword(s):  
Mathematical Model ◽  
Theoretical Analysis ◽  
Control Strategy ◽  
Neutral Current ◽  
Active Power Filter ◽  
Active Power ◽  
Current Control ◽  
Simulation Research ◽  
Power Filter ◽  
Voltage Balance

Taking three-level four-leg active power filter (APF) as research object, this paper establishes the corresponding mathematical model. In addition, the paper establishes the Matlab model based on predictive current control strategy, and then the theoretical analysis and simulation research are conducted. The simulation and experimental results show that the APF with predictive current control strategy can compensate harmonic current and neutral current well and make the two capacitors voltage balance effectively.

scholarly journals I Said No

2020 ◽  
Vol 3 (1) ◽  
pp. 136
Author(s):  
Madeline Donald
Keyword(s):  
Support Systems ◽  
Research Institutions ◽  
Fieldwork Experience ◽  
At Home

Research is an always already whole-self endeavour. As researchers we do not get to choose what parts of us to leave behind at home when we go to work; this is especially clear in the doing of fieldwork. Additionally, what happens in “the field” does not stay there. In fact that is the point. We move between fieldwork and reflection at varying intervals; it is through this corrugated process that research emerges. Research institutions need to recognize and provide appropriate preparation and support systems for researchers when their work takes them outside of the institutions’ walls. What follows is an account of the fieldwork experience that lead me to think about these dynamics of research and a window into those thoughts.

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