scholarly journals Innovation Control Strategy Simulation Research of Once-through Steam Generator

2021 ◽  
Vol 701 (1) ◽  
pp. 012067
Author(s):  
Y L Sun ◽  
S Y Cheng ◽  
G L Xia ◽  
L li ◽  
B W Zhang

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.


2019 ◽  
Vol 79 ◽  
pp. 03006
Author(s):  
Limian Wang ◽  
Shumao Wang ◽  
Zhenghe Song

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.


2014 ◽  
Vol 1049-1050 ◽  
pp. 1111-1115 ◽  
Author(s):  
Huan Huan Shi ◽  
Xiao Wu ◽  
Liang Hua ◽  
Hong Gang Ji

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


2014 ◽  
Vol 602-605 ◽  
pp. 2966-2969
Author(s):  
Jun Min Li ◽  
Jiang Tao Li ◽  
Xin Yu ◽  
Shu Han Wang ◽  
Si Cong Wu

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.


2014 ◽  
Vol 1049-1050 ◽  
pp. 767-770
Author(s):  
Wen Bao Hou ◽  
De Lu Li

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.


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