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.

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.

Optimization of Two-Stage Closure Law of Turbine Wicket Gates and its Application

2012 ◽  
Vol 249-250 ◽  
pp. 636-641 ◽  
Author(s):  
Sheng Chen ◽  
Jian Zhang ◽  
Xiao Dong Yu
Keyword(s):  
Mathematical Model ◽  
Transient Process ◽  
Field Test ◽  
Hydropower Station ◽  
Two Stage ◽  
The Mathematical Model

Optimization of closure law is the priority selection in solving the guaranteed regulation calculation problems due to its simplicity and economy. This present study deals with the optimization of two-stage closure law of wicket gates, which has more advantages in control pressure and speed rise. The mathematical model of transient process is established by introducing the method of characteristic, whose correctness is validated by the field test. Then the model is applied to a specific hydropower station that only can employ closure law optimization to coordinate the contradiction between pressure and speed rise, for two-stage closure optimization. The achievements of the study can serve as a reference for similar projects.

Research on Benefits Distribution of Enterprise Information Technology Platform Based on Game Theory

2014 ◽  
Vol 543-547 ◽  
pp. 4374-4377
Author(s):  
Qiong Ren ◽  
Jun Ming Chang
Keyword(s):  
Mathematical Model ◽  
Game Theory ◽  
Information Technology ◽  
Indicator System ◽  
Enterprise Information ◽  
Technology Platform ◽  
Profit Distribution ◽  
Effective Operation ◽  
The Mathematical Model ◽  
Operation Characteristics

The reasonable benefit distribution of the enterprise information technology platform is the guarantee to make the platform effective operation. First of all, according to the enterprise operation characteristics, the paper analyzes the indicator system of interests distribution; second, from the factors of risk and cost, it establishes the mathematical model of profit distribution; finally, game theory technology is used to calculate the effectiveness of the model.

Influencing Factors Analysis on Regulating Effect of the Pintle Controlled Thrust Regulating Mechanism

2010 ◽  
Vol 44-47 ◽  
pp. 1320-1324
Author(s):  
Lan Ting Zhang ◽  
Hai Qing Cheng ◽  
Li Ming Song ◽  
Jin Shun Yan
Keyword(s):  
Mathematical Model ◽  
Influencing Factors ◽  
Theoretical Foundation ◽  
Rocket Engine ◽  
Structure Design ◽  
Factors Analysis ◽  
Main Factors ◽  
Solid Rocket ◽  
And Control ◽  
The Mathematical Model

Based on the thrust regulating principle of pintle controlled solid-rocket engine, the mathematical model between pintle motion and thrust changing is established, and influence of main factors to thrust regulating effect is analyzed. These results can provide theoretical foundation for structure design and control of pintle controlled thrust regulating mechanism of solid-rocket engine.

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.

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.

An Analysis on the Water Consumption Rate of LongTan Hydropower Station with Properties of Water Energy

2013 ◽  
Vol 648 ◽  
pp. 218-222
Author(s):  
Xiao Guang Lei ◽  
Ao Yin
Keyword(s):  
Mathematical Model ◽  
Water Consumption ◽  
Consumption Rate ◽  
Hydropower Station ◽  
Total Water ◽  
Unit Load ◽  
Total Water Consumption ◽  
Actual Operation ◽  
Incremental Rate ◽  
The Mathematical Model

The mathematical model of water consumption rate of LongTan Hydropower Station is established in this thesis. With the aim of reaching the minimum total water consumption of power generation, Equation Incremental Rate is used to solve this mathematical model with constant overall load of the hydropower station. Equation Incremental Rate is used in this thesis to solve some instances, prove the rationality of the mathematical model established and demonstrate that the unit load value calculated can direct the actual operation of the hydropower station better, thus the aim of energy saving and consumption reducing can be achieved.

Influence of Tailrace Surge Chamber with Standpipe on Draft Tube Pressure

2014 ◽  
Vol 607 ◽  
pp. 472-476
Author(s):  
Sheng Chen ◽  
Jian Zhang ◽  
Jian Feng An
Keyword(s):  
Mathematical Model ◽  
Draft Tube ◽  
Great Influence ◽  
Design Phase ◽  
Power Station ◽  
Pumped Storage ◽  
The Mathematical Model

Standpipe is a connection between surge chamber and tunnel, which can greatly reduce the quantities. This present study deals with how to take the influence of standpipe into consideration and what extent is the influence. The mathematical model of standpipe is established by introducing the method of characteristic. Then the model is applied in one pumped storage power station with long standpipe of 67m. Results show that the standpipe has great influence on whatever tank surge or pressure. And with the increasing standpipe length, the upsurge and minimum draft tube pressure present downtrend. The influence of standpipe in tailrace surge chamber should be considered in design phase. The achievements of the study can serve as a reference for similar projects.

Vector Control Study for Cascade Brushless Doubly-Fed Machine

2012 ◽  
Vol 433-440 ◽  
pp. 7247-7252
Author(s):  
Zheng Wang ◽  
Mo Yong Yang
Keyword(s):  
Numerical Simulation ◽  
Mathematical Model ◽  
Vector Control ◽  
Reference Frame ◽  
Control Strategy ◽  
Theoretical Foundation ◽  
Doubly Fed ◽  
Doubly Fed Machine ◽  
The Mathematical Model ◽  
Control Study

In this paper, the structure and principle of the cascade brushless doubly-fed machine are introduced and the mathematical model under rotor reference frame(d-q axis) is derived.The validity of the model has been verified by numerical simulation ,which provides the theoretical foundation for the study of control strategy and its implementation of this kind of machine in future.

The Modeling and Simulation of UAV Pneumatic Launch System

2013 ◽  
Vol 299 ◽  
pp. 27-30
Author(s):  
Xiao Long Liu ◽  
Chuang Na Xia ◽  
Sheng Gang Ma
Keyword(s):  
Mathematical Model ◽  
Modeling And Simulation ◽  
Unmanned Aerial Vehicle ◽  
Future Development ◽  
Theoretical Foundation ◽  
Bond Graph ◽  
Inflation Pressure ◽  
Work Process ◽  
Aerial Vehicle ◽  
The Mathematical Model

This paper is based on the Bond Graph method to establish the mathematical model of UAV (Unmanned Aerial Vehicle) pneumatic launch system, simulates its work process through using MATLAB software, analyzes the influence of changing air tank inflation pressure, air tank volume on launch performance, and draws some important conclusions, which can provide a theoretical foundation for the future development and improvement of the system.

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