Journal articles: 'Power and control in the research process'

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Mikhaylenko, Anna, and Pavel Shchinnikov. "Power Plants Process Control Improvement in Emergency." Applied Mechanics and Materials 792 (September 2015): 386–92. http://dx.doi.org/10.4028/www.scientific.net/amm.792.386.

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The paper shows the relevance of the research process protections of power units that reduce or prevent economic damage caused by the accident. For this data, the design methodology for coal-fired units with drum boilers, which allow to define the work on stored energy boiler auxiliary load. The proposed technique reduces the cost of implementing the considered technological protections.

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Gu, Jin Liang, Hong E. Luo, Lei Dou, Na Shen, Yan Xia, Huei Tie, Zhen Xiao Li, and Bao Ming Li. "The Research of The Pulse Power Source Sequential Control System." Applied Mechanics and Materials 241-244 (December 2012): 742–46. http://dx.doi.org/10.4028/www.scientific.net/amm.241-244.742.

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The pulse power source; Control system; Sequential control; Trigger control Abstract. In this essay, the working process of Capacitor-Based Pulsed-Power System and the requirement of the sequential control component applied in such system has been discussed. Based on that, further description of the composition and working principle of the sequential control system has been made .The diagram of each block of the sequential control system are displayed to illustrate the working process in engineering application and problems would confront in engineering designing process. Finally, the charging and discharging test and electromagnetic emission experiments have been conducted and prove that such sequential control system can function stably and reliably in strong electromagnetic interference environment and it also has good expansibility.

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Gang, Wang, and Xu Ke. "Research and application of bypass replacement logic and risk control of stability control device." E3S Web of Conferences 256 (2021): 01024. http://dx.doi.org/10.1051/e3sconf/202125601024.

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In order to prevent the power failure of the whole line caused by the maintenance of line switch, bypass switch is set in 220kV Main Wiring of some power plants. When the bypass replaces a line, there are three states in turn: line, bypass and line parallel operation, bypass operation. The bypass replacement logic of stability control device needs to correctly distinguish and switch these three states. This paper deeply studies the variation law of bypass, line analog and switching value in the whole bypass replacement process, puts forward the correct switching judgment method of line outage, trip and overload criteria, as well as the operation risk and prevention and control measures of bypass platen in the bypass replacement process, and then takes a power plant stability control device as an example to verify the results, which shows that the bypass replacement logic proposed in this paper is feasible. Risk prevention and control measures can ensure the correctness of logical discrimination of stability control devices in the process of bypass replacement, and can be extended to other power plant stability control devices.

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Ma, Bing, Li Jun Hao, and Zhe Zhang. "Applied Research of Wireless Communications in Industrial Process Control." Applied Mechanics and Materials 427-429 (September 2013): 860–63. http://dx.doi.org/10.4028/www.scientific.net/amm.427-429.860.

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Wireless communication technology has become another research focus in the field of industrial control. It, which is a revolutionary technology that can increase the scope of application of industrial measurement and control system, can be used not only as a supplement to the wired network, but also as a independent network. This article focuses on the wireless network communication protocol commonly used in modern industrial control, and highlights the wireless communication protocol ZigBee based on IEEE 802.15.4 and its characteristics. From the low-power, low-cost point of view the overall design of embedded wireless communication system which is based on ZigBee technology in industrial control are proposed, meanwhile it put forward the basic framework of wireless network nodes ZigBee, and the options of industrial site networking mode.

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Song, Jialong, and Peng Xie. "Research on battery peak power control method based on Improved PSO algorithm." E3S Web of Conferences 185 (2020): 01059. http://dx.doi.org/10.1051/e3sconf/202018501059.

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In order to better guarantee the operation effect of power equipment, a battery discharge peak power control method based on Improved PSO algorithm is proposed. The operation parameters between the peak power of battery discharge and external power supply are collected, and the operation parameters are switched by using the support bus. The power acquisition process of battery operation is standardized, and the power of battery power conversion unit is controlled by improving PSO algorithm. The results show that the control error of the battery peak power control method based on the improved PSO algorithm is significantly lower in the actual process, and the control accuracy is improved.

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He, Xin Sheng, Zuo Cai Dai, Chun Fu Gao, and Shao Tai Deng. "Research of Matching Power for Photovoltaic Charging Control System." Key Engineering Materials 620 (August 2014): 220–24. http://dx.doi.org/10.4028/www.scientific.net/kem.620.220.

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For the maximum output power varies with changes in load characteristics match the characteristics of solar cells in photovoltaic power generation system, the system runs through dynamic MPPT maximum power of self-optimizing process to achieve power from the PV charge control match. First, the output characteristic simulation analysis of the solar load resistive, capacitive load showed that solar power batteries for load matching efficiency is higher than in a purely resistive load. Then, using the improved algorithm for variable step size perturbation and observation of the received output power of solar power and load matching control, experiments showed that the optimum operating point of the circuit can control the real-time monitoring of solar cells and load. The output power from the battery load matching circuit to match the time working in the best working condition, if the energy is surplus or shortage, the system can control dynamic self-optimizing adjustment to charge, which leads to batteries absorbed power increasing and the efficiency of solar energy collection improving.

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Chen, Guo Jin, Ting Ting Liu, Jing Ni, Ming Xu, and Huo Qing Feng. "Research on Adaptive Power Control System of Working Machinery." Applied Mechanics and Materials 278-280 (January 2013): 1504–9. http://dx.doi.org/10.4028/www.scientific.net/amm.278-280.1504.

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The load changes of working machinery in the running process will certainly result in poor matches in the characteristics of the transmission system. For the issue, this paper studies the adaptive power control model and algorithm. The adaptive power control system is developed using the adaptive power control technology based on the load identification, and is applied in the full AC electric forklift and the CNC band sawing machine. The variable frequency system and intelligent control method based on the integration of the load characteristic recognition and control proposed in this paper, adaptively adjust the parameters of the PID controller according to the load characteristic parameters identified real-timely for the transmission system of the working machinery, so as to achieve the best performance matches, the highest effectiveness and lowest energy consumption of the entire transmission system.

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Wilczyński, Dominik, Krzysztof Talaśka, Ireneusz Malujda, and Piotr Jankowiak. "Experimental research on biomass cutting process." MATEC Web of Conferences 157 (2018): 07016. http://dx.doi.org/10.1051/matecconf/201815707016.

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This paper contains the results of the biomass cutting process in which wheat straw was used. Tests were made on the prototype test stand which made it possible to control the parameters of the cutting process and based on that define its energy consumption. During the research the following parameters were measured: rotational speed of electric motor, which drives the rotor with a set of cutting knives, electric current supply and torque on the shaft. Tests were made for the variable moisture content of the biomass and with knives with three different back-rake angles 5°, 15° and 30°. Using these measured parameters it was possible to calculate the power and the cutting force necessary to disintegrate biomass. The main goal was to find out if there is any influence of moisture content and the back-rake angle of the cutting knife on the dynamic parameters of the process - power and cutting force. The presented results can be very useful in a design process for a working assembly of biomass disintegrating machines which are directed to the energetic efficiency.

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Zhang, Lin Yue, Yao Fu, and Xing Zhong Li. "Research on Integrated Shift Control Strategy for Automatic Transmission." Applied Mechanics and Materials 835 (May 2016): 687–92. http://dx.doi.org/10.4028/www.scientific.net/amm.835.687.

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Shift process of automatic transmission is divided into torque phases and inertia phase, and the control principle of clutch to clutch shift is studied with the lever method. Then, inertia phase engine and transmission integrated control principle and entire shift process engine and transmission integrated control principle are respectively studied with taking power on up shift as study example and taking the transmission output torque fluctuations during shifting minimum as control target. Simulation results are compared to the results of power on up shift without engine and transmission integrated control, and it is proved that the transmission output torque overshoot peak with inertia phase engine and transmission integrated control strategy is decreased significantly and shifting jerks are reduced. Shift quality is improved significantly.

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Liu, Da Li, Chang Juan Jing, Yuan Yuan Liu, and Qing Xi Hu. "Algorithm Research of Pattern Recognition for Process Control of Electrospinning." Advanced Materials Research 314-316 (August 2011): 1987–90. http://dx.doi.org/10.4028/www.scientific.net/amr.314-316.1987.

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Electrospinning is kind of unique craft to fabricate nanoscale fiber in the condition of high-voltage electric field. However, due to the nanoscale diameter manufacturing, it is a challenge to get the whole manufacturing process stable at certain level. For that sake, this paper figures out the monitor method for the electrospinning equipment, which solves the former matter as well as makes the fiber generating process in control. According to the method, CCD camera is put forward to make the detection of the Taylor cone image continuously, while pattern recognition algorithm is used to real-time monitor the shape and size of Taylor cone which indicate the stable process of electrospinning. In order to get the stable Taylor cone shape, the processing result is used as feedback signal for control system of the electrospinning equipment to coordinate the feeding module or power supply module. As a result, the problem of nonuniformity and uncontrollable about electrospinning has been solved effectively; what's more, experiments testify that this method is reliable and effective.

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Wang, Chao, Lin Nan Han, Yuan Yao, Qian Sheng Zhao, and Qing Xi Hu. "Research on Numerical Control Machining Simulation Based on Power Mill and VERICUT." Applied Mechanics and Materials 121-126 (October 2011): 2200–2204. http://dx.doi.org/10.4028/www.scientific.net/amm.121-126.2200.

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To prevent the collision of tools and machine during the process of numerical control processing, reduce the number of cutting experiments and improve the production efficiency, it is a better way by using virtual simulation. This paper based on a mold cavity model of STL files, realized the numerical control programming based on Power Mill, researched the dynamic simulation process based on VERICUT, and at last verified the correctness and practicability of VERICUT simulation result by physical processing, which provided a reliable reference for physical machining.

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Guo, Tong, Tianliang Lin, Qihuai Chen, Haoling Ren, and Shengjie Fu. "Research on Constant Power Control Strategy of Pure Electric Excavator." Applied Sciences 10, no. 21 (October 28, 2020): 7599. http://dx.doi.org/10.3390/app10217599.

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Electric construction machinery can achieve zero emissions and be pollution free in the process of construction. In an electric excavator, to make full use of the output power of the power source, the output power of the electric motor (EM) should be absorbed by a hydraulic pump on the most attainable level. Therefore, constant power control is generally employed to achieve power matching between the power source and hydraulic pump. In this paper, considering the shortcomings of a single constant power point in a traditional load sensing system of electric construction machinery, combining the discharge characteristics of the li-ion battery and the overload capability of EM, a piecewise constant power control strategy is proposed to realize the organic unity of power and safety for a novel electric construction machinery power train system. The control strategy is verified by simulations and experiments. The results show that the system can not only satisfy the large power output but also ensure the normal and stable operation of the system when the electric excavator meets the heavy load through the piecewise constant power control. The proposed control strategy improves the dynamic performance of the system on the basis of ensuring the safety of the system.

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Wang, Xin Ping, Jian Jun Dang, and Zhi Cao Zhao. "Research on Closed-Loop Control of the Step Response." Applied Mechanics and Materials 127 (October 2011): 71–76. http://dx.doi.org/10.4028/www.scientific.net/amm.127.71.

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Based on the analysis of six kinds of working points, the process function of torpedo thermal power propulsion system is solved. The results show that the process transfer function is approximate to inertial link. PI control algorithm is presented and its parameters are deduced. The algorithm can not only control the output variables, but also can monitor the intermediate variable. Closed-loop control system model is established. Variable speed characteristics of torpedo at constant depth and steady speed characteristics in depth-changed process are simulated by MATLAB. Simulation results indicate that the system has satisfactory dynamic performance and the control quality performs well.

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Du, Xin, and Ling Zhu. "Research on Control Method of DC Voltage Based on Power Feedforward." Applied Mechanics and Materials 380-384 (August 2013): 3065–68. http://dx.doi.org/10.4028/www.scientific.net/amm.380-384.3065.

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DC-bus voltage is affected by fluctuations of load and grid impact, threating the safe operation of the system. According to the instantaneous active power balance, a power feedforward control strategy was proposed to reduce the DC voltage fluctuations. In this strategy, the load active power was directly fed-forward to the grid-side given instantaneous active power node through a constructed load state feedforward channel, which avoided the slower process of indirect power adjustment through outer voltage loop. So, the system response speed was greatly accelerated, the DC-bus voltage fluctuation was inhibited effectively, and the dynamic performance of the system had improved. Test results demonstrate the effectiveness of the proposed strategy.

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Jia, De Li, Jin Song He, Ji Chao Ning, and Chun Sheng Wang. "Research on Intelligent Control Strategy of Inverted Plasma Cutting Power." Advanced Materials Research 179-180 (January 2011): 1223–28. http://dx.doi.org/10.4028/www.scientific.net/amr.179-180.1223.

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The inverted plasma cutting power supply has multi-variable, nonlinear, strong coupling and time-varying characteristics and technological requirements. This paper proposes a decoupling control strategy based on fuzzy neural network expert system for the multi-parameter dynamic coupling and the uncertainty of the optimal output of the cutting process. It achieves the reasoning and decision-making through the fuzzy production rules. It adjusts the parameters of the neural network by adaptive algorithm, thus gets the optimal reference current of closed-loop controller, and then achieves the given current closed-loop control by means of RBF neural network adaptive PID controller. The simulation results show that the controller has good self-adaption and approximation. Compared with traditional PID controller, the system has great improvement on static accuracy, robustness and response speed. It is verified that the controller has the advantage of dealing with discrete problem and coupling multivariable problem.

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Wei, Hong Li, Zheng Chen, and Yong Qing Wei. "Research on SVPWM Control of Three-Level Inverter." Advanced Materials Research 516-517 (May 2012): 1816–21. http://dx.doi.org/10.4028/www.scientific.net/amr.516-517.1816.

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Three-level inverter SVPWM control process and algorithm are detailed analysis in this article, and put forward a new algorithm to reduce the amount of computation, establishment of three-level inverter simulation model, through analysis, validation the based of SVPWM control of three level inverter can overcome many disadvantages of the traditional two level inverter in high power transform, has extensive practical value.

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Pei, Su Ping, and Bi Rui Wu. "The Research and Implementation of the Mid-Frequency Power." Applied Mechanics and Materials 492 (January 2014): 439–42. http://dx.doi.org/10.4028/www.scientific.net/amm.492.439.

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This paper discusses the research and implementation of the mid-frequency power (MFP). The paper analyzes the present research situation and the existence question of 400Hz mid-frequency power supply. Then the research of full digital control realization process of mid-frequency power supply with high power factor and multiple closed-loop feedback (MCLF) is given. The principle and characteristic of the closed-loop control system are provided. Finally the experimental prototype taking DSP of TMS320F2812 type as control device is developed. The experimental results verify the rationality .

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Zeng, Qing Liang, Bin Bin Liu, Xin Chao Wang, and Qiang Gu. "Research on Digital Controls of Piston Pumps Based on Compound Control Using Feed-Forward and Feedback Controls." Applied Mechanics and Materials 727-728 (January 2015): 843–46. http://dx.doi.org/10.4028/www.scientific.net/amm.727-728.843.

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Taking the swash plate piston pump as the research plant, the paper introduces the composition of digital control system of variable pump first; Then the mathematical model of variable mechanism is established according to which the closed-loop flow control system and the power control system are worked out. Also, the paper shows the stability margin of the control system and analyzes some response indices to step command under Matlab simulation. Aiming at the shortage of the closed-loop control system, the paper gives an idea of an optimization design of the compound power control system based on both feed-forward and feedback control. Compared with the conventional closed-loop power control method, the compound one gets a 47.2% reduction in the adjusting time and a 38.2% decrease in the overshoot indicating that the adjusting process is obviously shortened and the disturbance effect effectively weakened.

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Zhao, Hai Long, and Zhong Ying Lin. "Research of UHV DC Transmission Based on the Current Control." Applied Mechanics and Materials 143-144 (December 2011): 19–23. http://dx.doi.org/10.4028/www.scientific.net/amm.143-144.19.

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Compared with AC (alternating current) transmission, DC(direct current) transmission has obvious superiority at high power, long distance, submarine cable transmission and asynchronous interconnected between exchange systems etc.. This paper constructed a kind of 12 pulse bridge UHV DC transmission system that includes control protection function through MATLAB/Simulink tool. By setting the breaker parameters, this paper studied the 12 pulse bridge UHV DC transmission system AC/DC side in case of setting down time, type and cleared. The simulation results demonstrate that this system has a good effect in harmonic control and it has no power compensations in realizing HV DC process, and it can completely work as an important reference in constructing HV DC power grid.

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Liu, Jin. "Research of Embedded Control System of DFIG Wind Generation." Advanced Materials Research 608-609 (December 2012): 738–41. http://dx.doi.org/10.4028/www.scientific.net/amr.608-609.738.

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This paper presents an embedded control system for wind power generation based on DFIG (Doubly-fed Induction Generator). DSP was used as the core of the control system, which can meet the requirement of high precision and real time. An embedded real-time operation system (RTOS) was transplanted into the hardware platform and some function blocks in common use were added into the RTOS. The control system software in the computer was programmed with LabVIEW, which perform the control function and can process the data came from the A/D in the platform. By using this experiment platform, many control arithmetic of wind power generation can be tested in the laboratory.

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Qin, Yan, Ya Qin Guo, Zhong Nian Li, Yun Feng Yue, and Xin Zhou. "Research on the Intelligent Tracking Control System for SPBP." Applied Mechanics and Materials 220-223 (November 2012): 1099–102. http://dx.doi.org/10.4028/www.scientific.net/amm.220-223.1099.

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Abstract. This paper proposed the PLC (Programmable Logic Controller) for the control of nuclear fusion, fuzzy control technology, PWM (Pulse Width Modulation) control method, to SPBP (Solar Photovoltaic Battery Plate) for intelligent control, the SPBP in photovoltaic power generation process," always and automatically tracking the strongest solar radiation", full" PV" role, so as to achieve the best effect of power generation of the research methods and technical route. The design for the modern SPBP intelligent" tracking" control system provides a novel and practical design case. Experimental results show that this control system, the design scheme is correct and feasible, and the performance-price ratio is very high.

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Liu, Jin, Yin Suo Niu, and Yi Gong Zhang. "Research on the Control System of DFIG Wind Generation." Applied Mechanics and Materials 421 (September 2013): 605–8. http://dx.doi.org/10.4028/www.scientific.net/amm.421.605.

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This paper researches on the control system for wind power generation of DFIG (Doubly Fed Induction Generator). DSP TMS320F28335 was used as the core CPU of the control system, which can meet the requirement of high precision and real time. An embedded real-time operation system (RTOS) was transplanted into TMS320F28335 and some function blocks in common use were added into the RTOS. The human-machine interface of the control system was programmed with LabVIEW, which perform the control function and can process the data came from the control system. By using this control system, many control arithmetic of wind power generation of DFIG can be tested in the laboratory.

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Liu, Hong Wei, Li Juan Wang, and Jun Hui Tian. "Research on Drive Control and Safety Management Strategy for Electric Vehicle." Applied Mechanics and Materials 721 (December 2014): 308–12. http://dx.doi.org/10.4028/www.scientific.net/amm.721.308.

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The driving intentions are identified, based on gear, pedal signals and vehicle status. Driving process is divided into starting mode, driving mode, reversing mode and so on. Safety management module is set, in order to control the process of power on and off, and detect the main fault related to vehicle control unit.

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Zhang, Haichuan, Yue Li, and Zhaojin Liu. "Research on the Input Power Measurement and Control Technology for Ozone Production Process with DBD." International Journal of Control and Automation 9, no. 2 (February 28, 2016): 287–96. http://dx.doi.org/10.14257/ijca.2016.9.2.27.

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Wang, Jian Bin, and Ji Shu Yin. "Optimization Research of Process Parameters for Laser Cladding Valve Parts Based on Genetic Algorithm." Applied Mechanics and Materials 229-231 (November 2012): 382–86. http://dx.doi.org/10.4028/www.scientific.net/amm.229-231.382.

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The optimization research of process parameters for big power Laser cladding valve parts, is a research focus of modern surface hardening technology. The article discussed in detail for solving the optimum process parameters of Laser cladding for the selection approach of strategy of genetic algorithm, the quantitative relationship model was established between process parameters and the valve parts property using neural network method , which process parameters are laser power (P), scanning speed (V), powder feeding rate (G), scan spacing (D) and thickness ( ) etc., the best configuration program of Genetic Algorithm control parameters has been obtain by means of the parameters encoding、initial group setting、fitness function design,genetic operation design and algorithm control parameters setting. The optimization of process parameters is obtained to fit the Laser cladding technology by using genetic algorithm toolbox in the MATLAB environment, and the optimization goal of the valve parts property has also been achieved. Practice has proved that the optimal process parameters are correct by the genetic algorithm , and has a very good production practice guide.

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Wang, Guishuo, Xiaoli Wang, Fuan Wang, and Zhao Han. "Research on Hierarchical Control Strategy of AC/DC Hybrid Microgrid Based on Power Coordination Control." Applied Sciences 10, no. 21 (October 28, 2020): 7603. http://dx.doi.org/10.3390/app10217603.

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The AC/DC hybrid microgrid has a large-scale and complex control process. It is of great significance and value to design a reasonable power coordination control strategy to maintain the power balance of the system. Based on hierarchical control, this paper designs a reasonable power coordination control strategy for AC/DC hybrid microgrid. For lower control, this paper designs a variety of control modes for each converter in different application scenarios. For the higher control, this paper analyzes the working mode of the system and designs the power coordination control strategy under the grid-connected and isolated island mode. In grid-connected operation, the DC bus voltage can be stabilized by adjusting the operation mode of the DC energy storage and the on-off of the secondary load. In isolated island operation, the DC sub-microgrid is the main microgrid, and the DC energy storage is the main power regulating equipment. This is based on the principle of “energy is in short supply in the system, DC energy storage finally discharge, energy supply exceeds demand in the system, DC energy storage gives priority to charging” of DC energy storage. By adjusting the control strategy of the micro-source, the reference power, and the on-off of the secondary load, the overall power balance is maintained. The Matlab/Simulink simulation software was used to build the AC/DC hybrid microgrid simulation model, which verified the effectiveness and stability of the proposed power coordination control strategy under various operating conditions.

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Cui, Wen Chong, and Yu Lin Dong. "PLC-Based Embedded Intelligent Control Research." Applied Mechanics and Materials 799-800 (October 2015): 1127–31. http://dx.doi.org/10.4028/www.scientific.net/amm.799-800.1127.

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With the rapid development of industrialization, the intelligent control has increasingly replaced the traditional process control in PLC in recent years, in which some intelligent control strategy has been applied to industrial control cases, such as genetic algorithm, fuzzy control, expert control and neural network and so on. However, it is not sufficient to achieve the desired control effect if only an intelligent control method is applied in the intelligent control. Therefore, integrated intelligent control of various control strategies is bound to be a focus in the embedded intelligent control. At the same time, with growing power of the PLC processing, it is possible for complex algorithms to be used in the embedded application, which has great significance in the development of industrialization as well as intelligent control.

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Yang, Shu Ying, Li Hong Wu, and Zhao Xia Liu. "Research on Photovoltaic Grid-Connected Generation System." Advanced Materials Research 383-390 (November 2011): 4084–89. http://dx.doi.org/10.4028/www.scientific.net/amr.383-390.4084.

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This dissertation researches on photovoltaic grid-connected generation system. Photovoltaic grid-connected generation system has two core parts which are maximum power tracking control(MPPT) of photovoltaic cells and the control of the grid-connected inverter. Firstly,this paper introduces the operational principle and performance characteristic of photovoltaic cells,and describes the equivalent circuit and mathematical model. Secondly,this paper introduces several traditional MPPT control algorithms. Based on the maximum power of the fast track process and stability, an improved intermittent scan method is designed to implement the maximum power output in the photovoltaic grid-connection generation system and improve system performance and maximum power point tracking speed. Finally, this dissertation analyses the targets of grid-connected inverter control and studies the control strategies, and then designs mathematical model of control system in photovoltaic grid-connected voltage/current inverter based on Sinusoidal Pulse Width Modulation (SPWM).

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Wang, Husong, Zhenyu Ni, Wei Jin, Qizhong Huang, Guihui Xiao, Yuannan Le, Jianmin Liu, Xiaohu Hu, Lifeng Chen, and Biao Fang. "Research and practice of kinetic energy system risk control technology in tobacco enterprises." E3S Web of Conferences 237 (2021): 02019. http://dx.doi.org/10.1051/e3sconf/202123702019.

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The purpose of this paper is to provide a data-oriented risk prevention and control system for seven major kinetic energy supply systems (power distribution, dust removal, moisture removal and odor removal, air pressure, vacuum, process soft water and sewage station water manufacturing, boiler steam system, air conditioning). The traditional risk control means should be improved through systematic process and information technology, and the risk management of operation control should be gradually transformed from event-driven to data-driven, so as to strengthen the comprehensive warning and prevention and control of operational risks. The management mode of integrated management and control is “clear hierarchy, effective air separation, effective control in place, quick early warning and simple handling”. Water, electricity, gas and steam of the power system are realized as part of the internal quality and process control of the cigarette brand, and all the control is pushed to the power supply terminal.

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Yasuoka, Masaki, Takashi Shirai, Yutsuki Nisimura, Takaaki Nagaoka, and Koji Watari. "Development of an Efficient of Microwave Sintering Process." Advances in Science and Technology 45 (October 2006): 602–9. http://dx.doi.org/10.4028/www.scientific.net/ast.45.602.

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The drying and sintering processes require large quantities of energy. If this energy could be used more efficiently, less would be consumed. In this research, the effect of the microwave on the manufacturing process of ceramics where heat was needed was examined. We obtained the following results when oxide ceramics were dried and sintered by microwave technique: In drying process, slip cast bodies were dried rapidly by microwave drying and compared with those dried by conventional drying techniques. In sintering process, power consumption and efficiency were lower with the time-control method than with the power-control method. The power-control method gave more precise temperature control under our experimental conditions.

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Cheng, Hong Li, Wei Zhang, and Geng Chuan Zhang. "Research of Practical Solar Energy Intelligent Regulated Power Supply." Applied Mechanics and Materials 385-386 (August 2013): 1189–92. http://dx.doi.org/10.4028/www.scientific.net/amm.385-386.1189.

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A solar-powered fuzzy PID control based DC/DC series the LDO method is suggested to take advantage of the performance of the DC/DC converter high efficiency while reduce the output ripple and low voltage is continuously adjustable. Fuzzy PID control according to the error of sampling the output voltage and the desired output voltage, the DC/DC output and LDO output with constant pressure difference control. The circuit structure, the dynamic response of output voltage in the process of abrupt change of load and starting is analyzed. Parameter selection and design considerations are given. A BUCK converter is used as an example to show the design steps. Simulation study are made on the supply, the results of which show that method is feasible

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Zhang, Kai, Xin Min Zhang, and Xiao Feng Shang. "Research on Cladding Process of Metal Powder during Laser Additive Manufacturing." Applied Mechanics and Materials 380-384 (August 2013): 4311–14. http://dx.doi.org/10.4028/www.scientific.net/amm.380-384.4311.

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The process of laser additive manufacturing consists of depositing successive layers of molten metal powder to create a near-net shape. A high-power laser is used to melt incoming metal powder, which forms a molten pool on the surface. As the latter moves beneath the laser, this newly created molten pool solidifies. By properly controlling the trajectory of deposition tracks, one can create a diverse range of shapes with varying complexities. In nature, the laser additive manufacturing technology is a continuous multilayer laser cladding process under the control of computer. The microstructure morphology of cladding layer is essential for the performance of as-deposited metal parts, so the cladding process was studied through related experiment. Based on the solidification theory, the microstructure morphology and the evolution rule were comprehensively analyzed. The results indicate that the temperature gradient and the solidification rate are the primary factor determining the microstructure morphology of cladding layer.

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Ulrich, Thomas A., Roger Lew, Steffen Werner, and Ronald L. Boring. "Rancor: A Gamified Microworld Nuclear Power Plant Simulation for Engineering Psychology Research and Process Control Applications." Proceedings of the Human Factors and Ergonomics Society Annual Meeting 61, no. 1 (September 2017): 398–402. http://dx.doi.org/10.1177/1541931213601582.

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We demonstrate the development, rationale, and use of a gamified microworld nuclear power plant simulation for engineering psychology research and process control applications. The Rancor microworld was developed to address specific research needs in support of ongoing U.S. nuclear control room modernization efforts. The Rancor microworld serves as a platform for inexpensive cognitive psychology research that would otherwise not be as feasible in typical complex process control research settings. The gamified nuclear power plant simulator is simple enough that untrained, novice participants can quickly learn and control the system. The Rancor microworld is currently configured to support an investigation of attention and situation awareness in nuclear process control is discussed. The Rancor framework is flexible to support rapid modification for addressing research needs related to complex process control.

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Zhang, Zhao Yan, Xing Wu Wang, and Yong Guang Ma. "Research on Simulation of Electronic-Protection Circuit of Chopper Cascade Speed Control System." Applied Mechanics and Materials 721 (December 2014): 569–74. http://dx.doi.org/10.4028/www.scientific.net/amm.721.569.

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Firstly, according to the topology of conventional chopper cascade speed system to analyze the transient process of main loop during of contactor operation when device failure. Because the contactor action requires a longer time, Equipment is vulnerable to the impact of high voltage, high current during the contactor action, and cause damage to power electronic devices. For contactors drawbacks, the main circuit topology with electronic-protection circuit is designed. Then analyze transient process of chopper cascade speed control system with electronic-protection circuit under high-voltage power failure conditions. Finally, simulation model of chopper cascade speed control system with electronic-protection circuit is built respectively in Matlab. Simulation results show that electronic-protection circuits effectively solve the problem of high-voltage power failure under active inverter structure and inverter subversion.

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35

Zhang, Wei, and Lei Li. "Automatic Control Technology in Smart Power Generation." Advanced Materials Research 546-547 (July 2012): 977–80. http://dx.doi.org/10.4028/www.scientific.net/amr.546-547.977.

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Automation of power generation and its control process is inevitable trend and requirement. In construction of smart grid, clean energy is a significant indicator of smart grid, and energy conservation and emission reduction is a major research task. Automatic control technology in power generation especially in energy conservation and emission reduction is briefly introduced in the paper. In power plant, there are some problems to solve in desulphurization and water feeding, and the application of automatic control technology could solve or improve the problems in some degree.

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Yuan, Bo, Wen Bing Lu, and Kai Yue Xu. "Research on Communication Circuit Applied in Street Lamp Control System." Applied Mechanics and Materials 536-537 (April 2014): 786–90. http://dx.doi.org/10.4028/www.scientific.net/amm.536-537.786.

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Taking the power distribution network situation in China into consideration, this paper proposes a communication circuit applied in street lamp control system. It first summarizes the overall design scheme of the control system. And then it demonstrates the high reliability of outbound Two Way Automatic Communication System (TWACS) within one transformer area and the low-cost characteristics of corresponding circuit. Finally, it proposes the design scheme of the communication circuit which can process Power Line Carrier communication (PLC) signals and outbound TWACS signals simultaneously, and it is based on single MCU. This design scheme is conducive to improving the communication efficiency and success rate of the street lamp control system to a great extent.

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Xu, Aidong, Kai Fan, and Hang Yang. "Research on Power Network Security Technology and Protection." MATEC Web of Conferences 246 (2018): 03016. http://dx.doi.org/10.1051/matecconf/201824603016.

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With the rapid development of information technology construction in the power industry, research on network security has become a problem that cannot be ignored. This paper introduces the use of information communication network equipment at home and abroad in power system; analyzes the security risks of foreign network equipment in power system, shows the risk of power system network and the urgent need for localization of network equipment and analyzes the security of internal network of power system Risks; specific measures for the safety control of network equipment in the whole process are proposed to provide reference for power system network security protection.

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Hu, Zhen Xing, and Ming Li. "Research on the Power Converter for Tidal Energy Generation." Applied Mechanics and Materials 278-280 (January 2013): 234–38. http://dx.doi.org/10.4028/www.scientific.net/amm.278-280.234.

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As a kind of renewable energy with abundant reserves, safety cleanliness and strongly predictability, tide energy generation technology has become a hot spot in the field of ocean energy development technology. The basic control scheme of the tidal energy generation system is introduced and working process of the three-phase single-switch Boost PFC converter is analyzed in detail. The simulation results show the validation.

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Gilmore, Walter E. "User Computer Interface Issues in Nuclear Process Control: Research and Applications." Proceedings of the Human Factors Society Annual Meeting 30, no. 11 (September 1986): 1072. http://dx.doi.org/10.1177/154193128603001105.

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The use of computer systems are becoming increasingly prominent as process control and information management tools in nuclear facilities. Eventually, it is believed that almost all plant processes will be controlled and monitored via some type of computer interface. The human factors data base of design guidelines, criteria and methods for evaluating the person-process interface is far from complete. Over the past four years, the Idaho National Engineering Laboratory (INEL) has been examining certain aspects of computer technology for process control functions to supplement the human factors data base and design practices. A major objective of this symposium is to introduce these findings in a cohesive set of four papers which address related UCI issues. An evaluation of the findings will be made from different viewpoints provided by a panel of experts. The case study approach is used in the first paper to describe the process and benefits obtained from incorporating human factors guidelines and methods in the design of a complex CRT display system for process control applications. Five different methodologies are summarized for usefulness in evaluating the effectiveness of CRT generated displays in the second paper. The methodologies are (1) psychophysics, (2) multidimensional rating, (3) checklist evaluation, (4) non-interactive evaluation, and (5) interactive evaluation. The third paper reports on the diagnostic and recovery performance of nuclear power plant operators with and without a response tree computer-based aid. Identification of technological changes in control room operations are described in the fourth paper. A modified Delphi approach was combined with the Analytical Hierarchical Process to categorize and relate technology advances and to determine the relative likelihood of achieving these conceptual changes in person-process interface systems in the near term.

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Henry, Emeric, and Marco Ottaviani. "Research and the Approval Process: The Organization of Persuasion." American Economic Review 109, no. 3 (March 1, 2019): 911–55. http://dx.doi.org/10.1257/aer.20171919.

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An informer sequentially collects and disseminates information through costly research to persuade an evaluator to approve an activity. Payoffs and control rights are split between informer and evaluator depending on the organizational rules governing the approval process. The welfare benchmark corresponds to Wald’s classic solution for a statistician with payoff equal to the sum of informer and evaluator. Organizations with different commitment power of informer and evaluator are compared from a positive and normative perspective. Granting authority to the informer is socially optimal when information acquisition is sufficiently costly. The analysis is applied to the regulatory process for drug approval. (JEL D82, D83, I18, L51, L65, O31)

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Li, Ke Jun, Jian Guo Zhao, Lin Niu, and Cheng Hui Zhang. "Research on Mode-Switching Control of Thyristor Controlled Series Capacitor." Key Engineering Materials 439-440 (June 2010): 325–30. http://dx.doi.org/10.4028/www.scientific.net/kem.439-440.325.

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The mode-switching control method of thyristor controlled series capacitor (TCSC) is of great importance to power system stability. It is very difficult, if not impossible, to realize mode-switching only by changing firing angles. Considering the impedance characteristics of TCSC, a set of mode-switching control methods is proposed. Simulation and experimental results show that the proposed switching method can make the switching process faster and possess better dynamic performance.

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Guo, Yanan, Ding Fan, Kai Peng, and Fang Tian. "Research on the Design Method of the Starting Process of Main Fuel Control system for Aviation Auxiliary Power Unit." MATEC Web of Conferences 227 (2018): 01004. http://dx.doi.org/10.1051/matecconf/201822701004.

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This paper analyzed the main fuel control system of the auxiliary power unit (APU), explored the starting process of the main fuel flow control system control law and control algorithm. Focus on analyzing the interpolation table that is involved in the controller of the starting process, restoring its physical meaning. The design method of the main fuel flow controller for the starting process of the APU is summarized. It’s a valuable reference for the future design of the control system of both aero-engine and auxiliary power unit.

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Jiang, Jian-jun, Li Zhang, Yi-qun Wang, Yu-yuan Peng, Kun Zhang, and Wen He. "Markov reliability model research of monitoring process in digital main control room of nuclear power plant." Safety Science 49, no. 6 (July 2011): 843–51. http://dx.doi.org/10.1016/j.ssci.2011.01.014.

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Pang, Yan Jun, Cheng Zhao Gu, Qing Hao Wang, Yu Jie Pei, Hui Yan Cao, Hong Zhi Jiao, Lin Bai, Hui Tang, Lei Wang, and Xue Wang. "Power Quality Analysis and Research of Fushun Area Grid." Applied Mechanics and Materials 543-547 (March 2014): 709–12. http://dx.doi.org/10.4028/www.scientific.net/amm.543-547.709.

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With the development of national economy, the progress of science and technology and the height of the production process automation, various nonlinear loads in power grid grow rapidly together with a variety of complex, precise and sensitive power equipment. The above-mentioned two aspects of contradiction is more and more prominent and the requirement of users for power quality is also higher. In such situation, this paper discusses the related theory and its control technology in the field of power quality, analysis the development trend of power quality management and control in our country, which has a strong practical significance. This paper expounds the main problems affecting the quality of electric energy, and analyze in detail the way to improve the quality of electric energy, and then give a preliminary discussion on the development direction of this field.

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Fei, Yuan, Quan Liu, and Yong Chen. "The Research of Variable Speed Constant Frequency Wind Power Generation Technology." Advanced Materials Research 986-987 (July 2014): 619–21. http://dx.doi.org/10.4028/www.scientific.net/amr.986-987.619.

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This paper briefly introduces the characteristics of wind power technology and its development process, Through data comparison, demonstrate the superiority of the variable speed wind turbine operation. In keeping the best tip speed ratio, the variable speed constant frequency control for the biggest wind power.

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Doukovska, Lyubka A., and Svetla I. Vassileva. "Intelligent methods for process control and diagnostics of a mill fan system." Cybernetics and Information Technologies 14, no. 1 (March 1, 2014): 151–60. http://dx.doi.org/10.2478/cait-2014-0012.

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Abstract The intelligent methods for process control and diagnostics of the mill fan system is an established field of scientific and applied investigations. In the present paper several types of process control approaches with different structures are considered. In order to choose the most efficient one, comparative analysis is carried out. The mill fans are a basic element of the dust-preparing systems of steam generators with direct breathing of the coal dust in the furnace chamber. Such generators in Bulgaria are the ones in Maritsa East 2 Thermal Power Plant, in Maritsa East 3 Thermal Power Plant and also in Bobov Dol Thermal Power Plant. The subject of this research is a device from Maritsa East 2 Thermal Power Plant. This is the largest thermal power plant on the Balkan Peninsula. Standard statistical and probabilistic (Bayesian) approaches for diagnostics are inapplicable to estimate the mill fan technical state due to non-stationarity, non-ergodicity and the significant noise level. The possibility to predict eventual damages or wearing out without switching off the device is significant for providing faultless and reliable work, avoiding the losses caused by planned maintenance.

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Hu, Bo, and Zai Lin Piao. "On the Contrast and Research of Maximum Power Point Tracking Control in the Microgrids PV System." Advanced Materials Research 756-759 (September 2013): 361–64. http://dx.doi.org/10.4028/www.scientific.net/amr.756-759.361.

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In microgrids operation, photovoltaic power generation system need to quickly and accurately for maximum power point tracking (MPPT), namely MPPT technology, because of the diversity of the control method, its control effect is different, a realization of process is also great difference. And because the current maximum power point tracking method is not enough accurate and mature, which led to the photovoltaic system power loss, this paper expounds the advantages and disadvantages of all kinds of tracking control method, in light of the maximum power point tracking control theory, and sums up the mathematical model of optimization, seeking the optimal control method. The paper is to explore maximum power point tracking control method development mentality, to look forward the research direction of the microgrids PV system.

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Zhang, Xiao-Jun. "Research on Anti-saturation Feedback Control Method for UAV Avionics System." MATEC Web of Conferences 232 (2018): 04008. http://dx.doi.org/10.1051/matecconf/201823204008.

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UAV avionics system is prone to saturation distortion under unsteady conditions, so anti-saturation control is needed. A control method of UAV avionics system based on anti-saturation feedback compensation is proposed. The anti-saturation control process of UAV avionics system is a multi-objective optimization process with multi-variables. The constrained parameter model of UAV avionics system control is constructed. Electromagnetic loss, torque, output power and other parameters are taken as constraint indexes, the original control information of UAV avionics system is treated with self-stabilization, the equivalent control circuit is designed, and the magnetic resonance transmission mode of avionics system is analyzed. An anti-saturation feedback tracking control method is used for steady-state control of the output voltage of the avionics system. The error compensation function is constructed to adjust the output adaptive parameters of the avionics system and the static anti-saturation compensator is constructed to compensate the power gain. The yaw error and the output steady-state error of the avionics system are reduced. The simulation results show that the proposed method has better output stability, lower output error, better real-time performance and better linear auto-disturbance rejection control performance.

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Zhao, Wei Mei, Chao Yang Zhu, and Zhen Yu. "Development and Research of an Integrated Platform System for Management and Control." Applied Mechanics and Materials 719-720 (January 2015): 732–36. http://dx.doi.org/10.4028/www.scientific.net/amm.719-720.732.

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This paper describes the current status of power communication systems, problems and solutions, proposed to build an integrated platform system for communications management and control.The integrated platform system is divided into four parts: Comprehensive Monitoring Subsystem, Resource Management Subsystem, Operation and Maintenance Management Subsystem, Security Management and Control Subsystem, which can monitor the resource, operation and maintenance, and security controls etc.This system can implement communication professional management, process management, user management, daily operation, maintenance work management standardization, process and automation; promote systematic and integrated for communication network, improve service management level and efficiency of operation and maintenance; and provide better support and protection for developing the grid and the smart grid.

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Suo, Na, and Lina Guo. "Research on thermal design control and optimization of relay protection and automation equipment." Thermal Science 24, no. 5 Part B (2020): 3119–28. http://dx.doi.org/10.2298/tsci191106086s.

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Relay protection devices and power automation systems are an important product in the power equipment manufacturing industry. They are customarily divided into secondary equipment for the transmission and distribution industry, and are responsible for protecting and controlling the primary equipment of the power grid and measuring the load of the power grid system. Thermal design is a major research topic for the reliability study of relay protection devices. The paper introduces the thermal design process of the relay protection device processing equipment, from the single-chip, module level, etc. to construct and isolate the airway facilities, and uses the FLOTHERM software to simulate the relay protection device model. Thermal simulation can guide the structural design, optimize the structure, make the single-machine structure more reasonable, and the heat dissipation more effective, improving the reliability of the single machine.

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Journal articles on the topic 'Power and control in the research process'

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