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
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[0029] Example 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 + λ ) · T RH s ] 1 + T RH + F IP 1 + T RH s + F LP ( 1 + T RH s ) · ( 1 + T CO s ) } - - - ( 1 )
[0032] In formula (1), G O (s) is the transfer function of the steam turbine model provided by the power system calculation program; ΔP M (s) is the transfer function of the increase in mechanical output power of the steam turbine; ΔQ(s) is the transfer function of the ...
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[0053] Example 2:
[0054] Step (1) is the same as in Example 1;
[0055] (2) Field test and data processing.
[0056] Step (2.1) is the same as in Example 1;
[0057] (2.2) Data processing. According to step (2.1), the flow command dynamic data f, the regulating stage pressure dynamic data P obtained 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) Use filter Where G lb (s) is the low-pass filter, and s is the Laplace operator. Both T and N are adjustable coefficients, where T takes a value of 2, and N takes a value of 5. For the increase in active power 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 at this time is ΔP M The filtered mechanical power increment ΔP M Means ΔP M =G lb (s)·ΔP E , Where ΔP M Is the mechanical power increment, G lb (s) is the low-pass ...
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