Steam turbine and speed regulating system model parameter correcting method thereof

A speed control system and steam turbine technology, applied in the direction of mechanical equipment, engine components, machines/engines, etc., can solve the problem of not considering the dynamic influence of the regenerative steam extraction system, the dynamic change of the unequal rate, and the inability to correctly reflect the influence of the dynamic characteristics of the system, etc. problem to achieve good robustness

Active Publication Date: 2014-11-12
NORTH CHINA ELECTRICAL POWER RES INST +2
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Problems solved by technology

However, the steam turbine model in the BPA software platform still does not consider the dynamic influence of the regenerative steam extraction system and the dynamic change of the droop
Therefore, in the power system failure mode, the model cannot correctly reflect the influence of each link on the dynamic characteristics of the system

Method used

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  • Steam turbine and speed regulating system model parameter correcting method thereof
  • Steam turbine and speed regulating system model parameter correcting method thereof
  • Steam turbine and speed regulating system model parameter correcting method thereof

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Embodiment Construction

[0040] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

[0041] Such as image 3 As shown, the present invention provides a method for correcting model parameters of a steam turbine and its speed control system, the method comprising:

[0042] Step S301: Establish a model of the steam turbine and its speed regulation system of the power grid generator set, and input the generator set side signal.

[0043] The model of the steam turbine and its governing system is the basic mathematical model of the generating set, and is a well-known model in the art. The steam turbine and its governing system model include the control sy...

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Abstract

The invention provides a steam turbine and a speed regulating system model parameter correcting method thereof. The method includes that a steam turbine of a power grid generator set and a speed regulating system model of the steam turbine are established, and a generator set side signal is input; and whether output data of the steam turbine and the speed regulating system model of the steam turbine exceed an error threshold value or not is verified under the disturbance working condition, if the output data exceed the error threshold value, at least one correcting operation among dynamic droop correction, regenerative system correction and non-linear characteristic correction is performed, and the corrected steam turbine and the speed regulating system model of the steam turbine are generated. According to the steam turbine and the speed regulating system model parameter correcting method thereof, a transition process between normal operation conditions and accident conditions can be simulated, and a model which is well matched with actual data result and provided with robustness can be obtained.

Description

technical field [0001] The invention relates to a steam turbine model parameter correction technology, in particular to a model parameter correction method of a steam turbine and its speed regulating system. Background technique [0002] The steam turbine regulating system is an important part to ensure the safe, stable and economical operation of the unit. The performance degradation and failure of the regulating system are mainly manifested in the parameter changes of each component of the system. Through the method of parameter identification, the change of system parameters can be detected, the state of the system can be monitored, the performance of the system can be predicted, and the failure of the system can be determined. In addition, fault diagnosis through parameter identification also has the characteristics of clear physical concept, easy fault separation, and wide adaptability of fault detection. [0003] However, both the traditional non-parametric model ide...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01D17/00F01D17/10
Inventor 赵婷郭钰锋黄葆华仇晓智李胜许晓菲
Owner NORTH CHINA ELECTRICAL POWER RES INST
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