MATLAB Calculation of Hydraulic Transients in Hydropower Simulation Application

2011 ◽  
Vol 219-220 ◽  
pp. 346-350
Author(s):  
Heng Lei ◽  
Ying Li
Keyword(s):  
Process Analysis ◽  
Operation Mode ◽  
Water System ◽  
Transition Process ◽  
Hydropower Station ◽  
Power Station ◽  
Hydraulic Transients ◽  
Power Operation ◽  
System Design Optimization ◽  
The Mathematical Model

In hydropower station in the operation of total with hydraulic transient process of the power station on the transition process analysis and calculation is quite important. This paper introduces the today's advanced scientific computing software MATLAB, and using the software of the Zipingpu hydropower station hydraulic transients from the mathematical model and calculation simulation etc is analyzed and calculated with research, in order to seek appropriate power operation mode, unit close regularities. For power station and water system design optimization, safe operation, provides the basis.

Study on Stability of Hydroelectric Generating Set Influenced by the Governor Parameters under Isolated Grid

2014 ◽  
Vol 875-877 ◽  
pp. 1799-1803
Author(s):  
Qing Song Huang ◽  
Xiao Juan Zhai ◽  
Yuan Zheng ◽  
Guang Wen Xu ◽  
Hao Wang
Keyword(s):  
Mathematical Model ◽  
Transition Process ◽  
Hydropower Station ◽  
Electrical System ◽  
Generating Set ◽  
Small Fluctuation ◽  
The Mathematical Model

In order to study on stability of hydroelectric generating set under isolated grid, taking hydraulic, mechanical, and electrical system into consideration to build the mathematical model. This paper has researched on the main governor parameters sensitivity in the small fluctuations transition process of complex hydropower station under isolated grid. According to the simulated results, KP or KI increases, or KD decreases appropriately, governor quality of small fluctuation transition process will be better. The influence caused by KD is the most obvious of the three.

Research of Economic Operation in Hydropower Station Based on Recursive Optimization

2012 ◽  
Vol 524-527 ◽  
pp. 2905-2910 ◽  
Author(s):  
Qing He Chu ◽  
Wei Hua Li ◽  
Chun Hua Sun
Keyword(s):  
Mathematical Model ◽  
Theoretical Foundation ◽  
Good Effect ◽  
Hydropower Station ◽  
Power Station ◽  
Economic Operation ◽  
Implementation Scheme ◽  
Recursive Optimization ◽  
The Mathematical Model ◽  
Operation Characteristics

Aiming at the operation characteristics of hydropower station and taking Guangxi SanCha power station for example, this paper introduces the mathematical model and the solution of recursive optimization in formulating the economic operation of hydropower station. The results show that the algorithm has good effect, and it lays theoretical foundation for the implementation scheme of the economic operation.

Experimental Research of Operation Performance of the Capillary Radiant Air-Conditioning Terminal Integrated with DC Variable Speed New Air Unit

2011 ◽  
Vol 374-377 ◽  
pp. 547-552
Author(s):  
Jian Bo Chen ◽  
Fei Cheng ◽  
Fen Li
Keyword(s):  
Energy Saving ◽  
Experimental Research ◽  
Air Conditioning ◽  
Storage Capacity ◽  
Heat Storage ◽  
Operation Mode ◽  
Water System ◽  
Variable Speed ◽  
Operation Performance ◽  
Cooling Ability

By means of experiment, the author analyzed the operation performance of the capillary radiant air-conditioning terminal integrated with DC variable speed new air unit. The results show that the operation mode that the capillary radiant air-conditioning terminal running combined with DC variable speed new air unit not only avoid the disadvantages of the capillary radiant air-conditioning such as temperature dropping slowly, condensation of moisture under hot and humid conditions during the cooling season, but also effectively overcome the problem that the cooling ability of the radiation surface is low caused by avoiding condensation, and the system can also take the moisture load indoor away as well as achieve the purpose of dehumidification. Besides, using the heat storage capacity of the capillary radiant air-conditioning terminal, controlling water- system of capillary radiant air-conditioning terminal to open and close appropriately can achieve the goal of energy saving.

scholarly journals Optimal operation strategy for subway HVAC system in transition seasons

2019 ◽  
Vol 111 ◽  
pp. 03006
Author(s):  
Yue Zhang ◽  
Xiaofeng Li ◽  
Bin Wang ◽  
Zheren Song
Keyword(s):  
Energy Saving ◽  
Calculation Method ◽  
Operation Mode ◽  
Water System ◽  
Optimal Operation ◽  
Operation Strategy ◽  
Ventilation Mode ◽  
Switching Condition ◽  
System Temperature ◽  
Switching Temperature

This paper mainly studied the operation strategy for subway VAC system during transition seasons. Two modes including WF-AC (Whole Fresh air- Air Conditioning) mode and B/E-V (Back/Exhausted fan-Ventilation) mode were selected based on energy saving principle. In order to decide the optimal operation mode, the calculation method of “switching temperature” was proposed. The main influencing factors of the switching condition include indoor cooling load, COP of the chilled-water-system, temperature difference of the supply air, efficiency of fan and the resistance of air duct. Also, the transfer temperature diagram is provided based on proposed calculation method, which is suitable for engineering use. The aim of this study is to regulate the operation mode and to promote energy saving in subway station.

The Control and Model of Synchronous Generator on Ship

2012 ◽  
Vol 195-196 ◽  
pp. 1095-1101
Author(s):  
Le Luo ◽  
Lan Gao ◽  
Liang Chen ◽  
Liang Hu
Keyword(s):  
Mathematical Model ◽  
Control System ◽  
Simulation Model ◽  
Synchronous Generator ◽  
Excitation Control ◽  
Synchronous Generators ◽  
Simulation Test ◽  
Power Station ◽  
Model And Simulation ◽  
The Mathematical Model

This paper analyzes the characteristics of marine power station. The mathematical model and simulation model of synchronous generators AVR+PSS excitation control system was built. At last the simulation test of suddenly add load was did in MATLAB/simulink environment. The result shows that the excitation control system has well stability, rapidity and some robustness.

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