Computer Simulation of the Hydropower Stations With Long Pressurized Pipelines and Far Transmission Line

2008 ◽  
Author(s):  
Jianxu Zhou ◽  
Chengmin Bi ◽  
Ming Hu
Keyword(s):  
Computer Simulation ◽  
Transmission Line ◽  
Water Flow ◽  
Rapid Development ◽  
Oscillation Mode ◽  
Elastic Model ◽  
Characteristic Analysis ◽  
Training Tool ◽  
Pressurized Pipelines ◽  
Hydropower Stations

With the rapid development of automatic technology and computer science in the hydropower stations, the computer simulation system named as simulator is developed quickly and applied widely especially as a modern training tool for field operators. In the project of power transmission from west to east in Southwest China, there are lots of hydropower stations with long pressurized pipelines and far transmission line, so their simulators are more complex to be built correctly to show the characteristic of hydraulic-mechanical-electrical system and its dynamic procedure distinctly in real time. Based on the characteristic analysis of hydraulic system and long transmission system, a new easily-decoupled elastic model of water flow in pressurized pipelines is given and recommended, and its application and the choice of appropriate model order are analyzed considering the effect of power system, furthermore, how to build the model of far transmission line is discussed in detail based on its state equations. The results indicate that, in order to realize the truthfulness and robustness of the simulator, the higher order oscillation mode of water flow in long pressurized pipelines should be introduced and the frequency property of far transmission line should be analyzed.

scholarly journals Computer Simulation Algorithm of Gymnastics Formation Change Path Based on Wireless Sensor

2021 ◽  
Author(s):  
Bingxin Chen ◽  
Lifei Kuang ◽  
Wei He
Keyword(s):  
Computer Simulation ◽  
Control Method ◽  
Rapid Development ◽  
Mobile Node ◽  
Wireless Sensor ◽  
Target Point ◽  
Simulation Algorithm ◽  
Mobile Nodes ◽  
Loop Control ◽  
Beacon Node

Abstract Today, with the rapid development of information age, the communication of science and technology is getting closer to each other, and our country has begun to conduct in-depth research on WSN. This study mainly discusses the computer simulation algorithm of gymnastics formation transformation path based on wireless sensor. In this study, an improved leader follower method is designed. In the research of gymnastics formation transformation of mobile nodes in wireless sensor network environment, the traditional three types of nodes are divided into four categories according to different formation responsibilities, namely coordinator, beacon node, leader and follower. When it makes accurate positioning with the help of beacon node information, it will send the information in the form of broadcast, and then the coordinator will send the information to the host computer through the serial port for tracking display. In order to make the mobile nodes in the network keep the current gymnastics formation moving towards the target point after completing the gymnastics formation transformation, this paper uses the L - φ closed-loop control method to modify the gymnastics formation in real time. The method based on the received signal strength is used to locate the mobile node. Combined with the positioning engine in the core processor CC2431 of the mobile node, the efficient and low-energy wireless positioning can be realized. Multiple mobile nodes coordinate and control each other, and each node communicates with each other through wireless mode, and senses its own heading angle information through geomagnetic sensor, so as to judge and adjust the maintenance and transformation of the current gymnastics formation. In the process of formation transformation, the analysis shows that the maximum offset of follower2 relative to the ideal path is + 0.28M in the process of marching to the desired position in the triangle queue. This research effectively realizes the computer simulation of autonomous formation.

CONSIDERATION OF BUOYANCE FORCES WHEN SIMULATING SUPERCRITICAL WATER FLOW IN VERTICAL TUBES

2017 ◽  
Author(s):  
Nataliia Fialko ◽  
◽  
Julii Sherenkovskiy ◽  
Nataliia Meranova ◽  
Serhii Aleshko ◽  
...  
Keyword(s):  
Computer Simulation ◽  
Water Flow ◽  
Supercritical Water ◽  
Flow Characteristics ◽  
Buoyancy Forces ◽  
Vertical Tubes

The results of computer simulation of supercritical water flow in tubes are presented. The regularities of the influence of buoyancy forces on the flow characteristics are investigated.

scholarly journals Resonator for microwave magnetoelectric effect

2019 ◽  
Vol 30 ◽  
pp. 07012
Author(s):  
Vyacheslav Lobekin ◽  
Alexandr Tatarenko ◽  
Andrei Belyshev ◽  
Mirza Bichurin
Keyword(s):  
Computer Simulation ◽  
Transmission Line ◽  
Ferromagnetic Resonance ◽  
Ring Resonator ◽  
Magnetoelectric Effect ◽  
Frequency Characteristics ◽  
Microstrip Transmission Line ◽  
Microstrip Ring ◽  
Microstrip Ring Resonator

The design of a ring resonator made on a microstrip transmission line is presented. A study of ferromagnetic resonance using this design was made. Computer simulation of a microstrip ring resonator was carried out, and amplitude-frequency characteristics were obtained.

Computer Simulation of Transmission Line Model for Landfill Leakage Location

2012 ◽  
Vol 466-467 ◽  
pp. 416-420
Author(s):  
Ya Yu Chen ◽  
Zhen Chong Wang ◽  
Chang Xin Nai ◽  
Lu Dong
Keyword(s):  
Computer Simulation ◽  
Transmission Line ◽  
Potential Distribution ◽  
Waste Treatment ◽  
Time Domain Reflectometry ◽  
Leakage Detection ◽  
Transmission Line Model ◽  
Line Model ◽  
Line Spacing ◽  
Solid Waste Treatment

Landfill is the main means of solid waste treatment in China at present, and the layers will leak different extent in the laying time. It is essential to locate leakage. The paper raises the conception that the application of transmission line model in the landfill leakage detection, the commonly method of TDR (Time Domain Reflectometry) is introduced, the transmission line model of landfill leakage detection is established, and the formula of a single loophole model is deduced, the result of computer simulation for the transmission line in landfill leakage detection is given. For with the leakage or not, potential distribution is contrasted. From transmit frequency and transmission line spacing for the influence of potential distribution, we use comsol to simulate. The results show that, the transmission line can be an effective method to locate the leakage region in a landfill.

Identification the Low-Frequency Oscillation Stakeout of Power System by Wide-Area Measurement System

2011 ◽  
Vol 128-129 ◽  
pp. 594-601
Author(s):  
Yang Liu ◽  
Qian Huang ◽  
Dong Chen
Keyword(s):  
Power System ◽  
Measurement System ◽  
Rapid Development ◽  
Oscillation Mode ◽  
Low Frequency ◽  
Area Measurement ◽  
Wide Area ◽  
Frequency Oscillation ◽  
Low Frequency Oscillation ◽  
Wide Area Measurement System

With the rapid development of interconnected power grid, the phenomenon of power system low-frequency oscillation appears unavoidably. Then, the appearance of wide-area measurement system provided a supporting technology for better scout low-frequency oscillation system and better recognize the oscillation mode . In this paper, the existing oscillation mode identifying methods are analyzed from the viewpoint of calculation speed, criterion, calculation accuracy, etc. Mainly compared the applicability of two methods, Prony and ESPRIT . Based on the above research, a new idea of monitoring power system low frequency oscillation based on WAMS is put forward in this paper.

Research on Oil Separator Control and Simulation

2012 ◽  
Vol 580 ◽  
pp. 365-368
Author(s):  
Xiao Li ◽  
Jin Hai Zhang
Keyword(s):  
Computer Simulation ◽  
Computer Technology ◽  
Rapid Development ◽  
Simulation Technology ◽  
Timing Control ◽  
Electronic Information ◽  
Typical Application ◽  
Training Assessment ◽  
Marine Oil ◽  
Important Means

With the rapid development of computer technology and electronic information technology is widely used, and application of computer simulation technology is increasingly popular. Engine room Simulator is a typical application of computer simulation technology in the field of maritime, has become an important means of training, assessment of the majority of the crew. Among them, marine oil separator system is an important part of marine Simulator. Simulation program for marine oil separator system timing control simulation for oil separator, and simulation for common failures.

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