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Method and device for preventing turbine control system of nuclear power station from generating disturbance

A technology for control systems and steam turbines, applied in safety devices, machines/engines, mechanical equipment, etc., can solve problems such as steam locks in steam turbines

Active Publication Date: 2015-06-24
LINGAO NUCLEAR POWER +1
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Problems solved by technology

[0005] The purpose of the embodiment of the present invention is to provide a method for preventing the disturbance of the steam turbine control system of the nuclear power plant caused by the short circuit fault of the power grid, aiming at solving the problem of how to avoid the steam lock phenomenon of the steam turbine when the power grid has an instantaneous fault

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  • Method and device for preventing turbine control system of nuclear power station from generating disturbance
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  • Method and device for preventing turbine control system of nuclear power station from generating disturbance

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Embodiment Construction

[0020] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0021] In the embodiment of the present invention, the acceleration limit of the high-cylinder shut-off valve of the steam turbine is set to be greater than or equal to the maximum acceleration of the steam turbine rotor when a transient fault occurs in the power grid. The acceleration limit of the shut-off valve controls the shut-off valve of the high cylinder of the steam turbine to keep open, so as to avoid the gas lock failure of the shut-off valve of the high cylinder of the steam turbine due to the instantaneous failure of the power grid, and further avoid the power generation caused by the ga...

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Abstract

The invention is suitable for the professional technical field of a million kilowatt level pressurized water rector nuclear power station and provides a method and a device for preventing a turbine control system of the nuclear power station from generating disturbance. The method comprises the steps of detecting the maximum acceleration of a rotor of the turbine in the nuclear power station when a power grid is subjected to a transient fault; setting the acceleration limitation of a high cylinder cutoff valve of the turbine in the nuclear power station to be larger than or equal to the maximum acceleration of the rotor of the turbine in the nuclear power station when the power grid is subjected to the transient fault; limiting a switch of the high cylinder cutoff valve of the turbine according to the acceleration of the high cylinder cutoff valve of the turbine in the nuclear power station. According to the method and the device for preventing the turbine control system of the nuclear system from generating disturbance, the high cylinder cutoff valve of the turbine is prevented from being subjected to the turbine locking phenomenon during the transient fault of the power grid.

Description

technical field [0001] The invention belongs to the professional technical field of a million-kilowatt pressurized water reactor nuclear power plant, and in particular relates to a method and a device for preventing a power grid short-circuit fault from disturbing a steam turbine control system of a nuclear power plant. Background technique [0002] The steam turbine control system of a million-kilowatt pressurized water reactor nuclear power plant generally has functions such as speed control, load control, overspeed protection, steam turbine power generation parameter monitoring, and thermal stress calculation. There are many ways of overspeed protection, one of which is acceleration overspeed protection. When the steam turbine adopts the acceleration overspeed protection mode, if the power grid instantaneous fault occurs, due to the mechanical characteristics of the high-cylinder stop valve of the steam turbine, it will cause the steam lock phenomenon of the steam turbine...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01D21/02
Inventor 马蜀浦黎项庆华夏红卫陈毓
Owner LINGAO NUCLEAR POWER
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