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Turbine model parameter identification method based on power response characteristics

A steam turbine and characteristics technology, applied in the field of steam turbines, can solve the problems of application limitations of identification methods, parameters that cannot truly reflect the characteristics of the steam turbine regulation system, and the actual characteristics of the unit that cannot be truly reflected

Active Publication Date: 2014-07-30
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Summarizing the characteristics of the existing steam turbine model parameter identification methods, it can be found that the seven model parameters to be identified jointly determine the dynamic characteristics of the steam turbine model, and a large error in the identification accuracy of a single parameter may cause the model to fail to match the actual steam turbine. characteristics; and the application of existing identification methods is limited
Once the unit deviates from normal conditions, the obtained model parameters cannot truly reflect the actual characteristics of the unit
If it exceeds its application range, the identified parameters may not truly reflect the characteristics of the actual steam turbine regulation system, resulting in errors in power system analysis and judgment

Method used

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  • Turbine model parameter identification method based on power response characteristics
  • Turbine model parameter identification method based on power response characteristics
  • Turbine model parameter identification method based on power response characteristics

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Experimental program
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Effect test

Embodiment 1

[0030] (1) Simplify the model. The steam turbine model provided by the power system calculation program is simplified to obtain a simplified model with fewer parameters and a clearer structure. The following formula (1) is the transfer function expression of the steam turbine model provided by the power system calculation program:

[0031] G O ( s ) = ΔP M ΔQ ( s ) = 1 1 + T CH s { F HP · [ 1 + ( 1 + ...

Embodiment 2

[0054] Step (1) is with embodiment 1;

[0055] (2) Field test and data processing.

[0056] Step (2.1) is with embodiment 1;

[0057] (2.2) Data processing. Based on the dynamic data f of the flow command obtained in step (2.1), the dynamic data P of the regulating stage pressure S , Main steam pressure dynamic data P T Calculate the theoretical steam flow increment ΔQ;

[0058] Steps (2.2.1)~(2.2.9) are the same as in Example 1;

[0059] (2.2.10) Using filters where G lb (s) is a low-pass filter, and s is a Laplacian operator. Both T and N are adjustable coefficients, where T takes a value of 2 and N takes a value of 5. For the active power increment ΔP obtained in step (2.2.9) E Perform low-pass filtering to effectively filter ΔP E In the high-frequency component, the mechanical power increment ΔP at this time M From the filtered mechanical power increment ΔP M Indicates that ΔP M =G lb (s)·ΔP E , where ΔP M is the mechanical power increment, G lb (s) is a l...

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Abstract

The invention provides a turbine model parameter identification method based on power response characteristics. The method comprises the following steps that (1) a model is simplified, simplified treatment is performed on a turbine model provided by a calculation procedure of a power system, and therefore the simplified model with the fewer parameters and the more clear structure is obtained; (2) a field test and data processing are performed; (3) parameter identification is performed, and obtained TN values, TCH values and TRH values are identification results. According to the model parameters obtained through the method, the power characteristics of a real turbine can be more accurately reflected, and the identification precision is improved. According to the method, a turbine model provided by the calculation procedure of the power system is simplified, the number of parameters to be identified is reduced, the identification efficiency is improved, and guarantees are provided for analyzing the accuracy of the running condition of the power system.

Description

technical field [0001] The invention belongs to the technical field of steam turbines, and in particular relates to a steam turbine model parameter identification method based on power response characteristics. Background technique [0002] The actual measurement and modeling of the parameters of the steam turbine regulating system is one of the key contents of the actual measurement of the "four parameters" of the power system. The model and parameters of the steam turbine regulating system are important basic data of the power grid, and the accuracy of power system analysis depends on the authenticity of the basic data of the power grid. The purpose of the parameter measurement and modeling of the steam turbine regulating system is to obtain the model and parameters that can truly reflect its actual characteristics according to the characteristics of the actual steam turbine regulating system. For the parameter measurement and modeling of the steam turbine regulating syst...

Claims

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Application Information

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IPC IPC(8): G05B13/00
Inventor 盛锴
Owner STATE GRID CORP OF CHINA
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