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A method for parameter identification of a steam turbine and its speed control system based on coarse and fine adjustment

A speed regulation system and parameter identification technology, applied in the direction of design optimization/simulation, can solve the problems of high manual participation, long cycle, poor adaptability, etc., to achieve high optimization efficiency, ensure coordination and accuracy, and avoid inconvenience. The effect of reliability

Active Publication Date: 2021-07-13
GUIZHOU POWER GRID CO LTD
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Problems solved by technology

[0009] The purpose of the present invention is to solve the problems of traditional steam turbine and speed control system parameter identification methods such as long period, poor adaptability and high manual participation

Method used

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  • A method for parameter identification of a steam turbine and its speed control system based on coarse and fine adjustment
  • A method for parameter identification of a steam turbine and its speed control system based on coarse and fine adjustment
  • A method for parameter identification of a steam turbine and its speed control system based on coarse and fine adjustment

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Embodiment Construction

[0062] In the actual test, the step signal test of the steam turbine is often done in the single valve mode. The step signal is issued by the valve position command, and the valve stroke opening is adjusted through the actuator to control the amount of steam entering the steam turbine to complete the adjustment of the speed and power of the steam turbine.

[0063] Firstly, sort out the test data involved in the identification process: valve stroke opening change data, high-pressure cylinder adjustment stage pressure change data, reheat pipeline pressure change data, middle row pressure change data, and power change data. In the actual process, the specific identification steps are as follows:

[0064] 1)T 1 , T 3 Assign initial value. Taking the change data of the valve stroke opening as input and the pressure change data of the adjustment stage of the high-pressure cylinder as output, positioning T 1 value; take the pressure change data of the reheat pipeline as input, and...

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Abstract

The purpose of the present invention is to solve the problems of long period, poor adaptability and excessive manual participation of traditional steam turbine and speed regulating system parameter identification methods. Based on the steam turbine and speed control system model provided by PSD-BPA, the sensitivity of the parameters to be identified is obtained by analyzing the sensitivity of the parameters in the system. According to the sensitivity of the parameters, a combination of "thickness and fineness" is adopted. Based on the particle swarm optimization algorithm (PSO ), initially locate the identification range of important parameters, and then fine-tune the identification range of less important parameters, and finally complete the identification process. The identification strategy has the characteristics of fast identification speed, high precision, strong adaptability, less human intervention, and strong automation ability.

Description

[0001] 1. The title of the invention: [0002] A method for parameter identification of a steam turbine and its speed control system based on coarse and fine adjustment [0003] 2. Technical field [0004] The invention relates to a method for identifying key parameters of a steam turbine and a speed regulating system in a power system, in particular to a method for completing the identification of important parameters using a brand-new identification strategy based on an intelligent optimization algorithm, and belongs to the field of automatic control technology application and optimal control. [0005] 3. Background technology [0006] ①As one of the most important equipments of thermal power generating units, the steam turbine is responsible for the energy conversion in the process of power production, and its dynamic performance is directly related to the economical and safe operation of the unit. The change of the steam pressure in the steam turbine directly affects the d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/25
Inventor 钟晶亮邓彤天王家胜张颖
Owner GUIZHOU POWER GRID CO LTD
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