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Nuclear power unit control method and system considering quick-closing valve action

A technology of a nuclear power unit and a control method, applied in the field of nuclear power plants, can solve the problem of not considering coupling characteristics, etc., and achieve the effect of ensuring integrity

Pending Publication Date: 2022-01-28
中广核工程有限公司 +1
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  • Description
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AI Technical Summary

Problems solved by technology

In the existing simulation modeling of nuclear power units, the thermal system of the first and second loops is completely decoupled from the power system dominated by steam turbine generator sets, and its coupling characteristics in the transient process are not considered

Method used

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  • Nuclear power unit control method and system considering quick-closing valve action
  • Nuclear power unit control method and system considering quick-closing valve action
  • Nuclear power unit control method and system considering quick-closing valve action

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Embodiment Construction

[0041] The present invention will be described in detail below with reference to the accompanying drawings.

[0042] see figure 1 , a nuclear power unit control method considering the quick closing valve action of the present invention includes the following steps:

[0043] According to the active power, the voltage and speed of the machine end fed back, the auxiliary signal for excitation control is obtained through the PSS system. According to the terminal voltage V T , excitation current I f With the auxiliary signal for excitation control, the voltage of the synchronous generator is controlled by the excitation system; the input mechanical power of the synchronous generator is controlled by the speed control system including the fast closing valve according to the speed of the synchronous generator.

[0044] Since the synchronous generator is the same as the traditional thermal power unit, it will not be repeated here.

[0045] The excitation system includes the AVR (A...

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Abstract

The invention provides a nuclear power unit control method and system considering quick-closing valve action. The method is characterized in that the voltage of a synchronous power generator is controlled through an excitation system according to the power generator end voltage and excitation current, and the input mechanical power of the synchronous power generator is controlled through a speed regulation system containing a quick-closing valve according to the rotating speed of the synchronous power generator. According to the invention, a quick-closing valve arranged in an actual nuclear power station is considered, a rotating speed deviation signal is used for controlling a quick-closing valve system, intervention of operating personnel is not needed under the normal condition, the method is a measure for minimizing damage to main equipment and guaranteeing the integrity of a unit in work, and after the necessity of limiting the power of the unit through continuous quick closing for a long time is eliminated, rapid load increasing becomes possible.

Description

technical field [0001] The invention belongs to the technical field of nuclear power plants, and in particular relates to a control method and system for a nuclear power unit considering the action of quickly closing a steam valve. Background technique [0002] Since nuclear power units usually operate with base load and have the characteristics of large single-unit capacity, once the extreme working condition of load shedding and island operation occurs, the safety and stability of the unit will face challenges. The islanding operation characteristic is an important dimension to measure the safe and stable operation capability of nuclear power units. Therefore, the islanding operation test is an indispensable test item in the commissioning stage of nuclear power plants. Runs on electricity. [0003] Quick closing valve is an effective measure to quickly close the regulating valve of the steam turbine under extreme working conditions, reduce the output of the steam turbine,...

Claims

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Application Information

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IPC IPC(8): G05B19/042
CPCG05B19/0423G05B2219/25257
Inventor 张清良孙辉翟长春张兴振张嘉林秦博宇王鹏飞
Owner 中广核工程有限公司
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