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Fractional order PID speed regulating system based modeling method for hydraulic turbine comprehensive model

A technology of speed regulation system and model modeling, which is applied to controllers with specific characteristics, electric controllers, etc., and can solve problems such as failure to reflect changes in important parameters of hydraulic turbines.

Active Publication Date: 2019-09-20
NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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Problems solved by technology

[0009] The present invention is to solve the problem that the nonlinear mechanism modeling of the water turbine cannot reflect the change of various important parameters of the water turbine under dynamic load, and proposes a comprehensive model modeling method of the water turbine based on the fractional-order PID speed control system

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  • Fractional order PID speed regulating system based modeling method for hydraulic turbine comprehensive model
  • Fractional order PID speed regulating system based modeling method for hydraulic turbine comprehensive model
  • Fractional order PID speed regulating system based modeling method for hydraulic turbine comprehensive model

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Embodiment Construction

[0091] Such as figure 1 Shown: the hydraulic turbine comprehensive model modeling method of a kind of self-adaptive fractional order PID speed control system of the present invention, it is characterized in that, comprises the following steps:

[0092] Step 1: Establish a mathematical model for simulation and analysis of the hydraulic turbine governor based on the fractional-order PID speed control system, and use a hybrid algorithm to optimize the objective function of the fractional-order PID-based speed control system;

[0093] Step 2: Establish the mechanical hydraulic system and the water diversion system mathematical model of the turbine speed control system;

[0094] Step 3: Establish the turbine generator model, extend the traditional first-order turbine generator model to the fifth-order turbine model, and introduce the exciter model and dynamic load model;

[0095] Such as figure 2 Shown: said step 1 specifically includes the following steps:

[0096] Step 1.1: O...

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Abstract

The invention provides a fractional order PID speed regulating system based modeling method for a hydraulic turbine comprehensive model. The method includes the following steps: step 1, establishing a hydraulic turbine governor simulation analysis mathematical model of a fractional order PID speed regulating system, and utilizing a mixed algorithm to optimize the objective function of the fractional order PID speed regulating system; step 2, establishing the mathematical models of a mechanical hydraulic system and a water diversion system of a hydraulic turbine speed regulating system; and step 3, establishing a hydraulic turbine generator model. Through the utilization of MATLAB simulation modeling, improvement can be performed on classic PID speed regulating systems on the basis of previous research; comprehensive models which can reflect each parameter of the hydraulic turbine speed regulating system and the generator system can be established according to the analysis of embodiments; and for the running conditions of actual hydraulic turbine units in actual application, good reaction can be achieved on the parameters of hydraulic turbines during the fluctuation of loads, so that guarantee can be provided for accident prediction and system safety operation.

Description

[0001] Technical field: [0002] The invention relates to the mechanics of a hydropower station and the principle of a water turbine speed regulating system, in particular to a water turbine comprehensive model modeling method based on a fractional order PID speed regulating system. Background technique [0003] The control structure of the traditional hydraulic turbine speed control system generally adopts the classic hydraulic turbine speed control system, that is, the parallel PID speed control system control, which has the advantages of simple and easy operation. With the development of the power system, the stability requirements for hydroelectric units are also constantly increasing. However, the water turbine system controlled by the parallel PID speed control system has the following problems: [0004] 1. The stability is slow when starting; [0005] 2. Poor stability when the system load fluctuates, and insufficient self-regulation ability in the face of emergencies ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B11/42
CPCG05B11/42Y02E10/20
Inventor 熊军华史宏杰王亭岭姜耀鹏阿旺多杰张兴旺赵世豪
Owner NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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