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A primary frequency modulation control method and device for a steam turbine in a nuclear power plant

A control method and steam turbine technology, applied to mechanical equipment, engine components, machines/engines, etc., can solve problems such as output power fluctuations, and achieve the effect of avoiding output power instability

Active Publication Date: 2022-05-24
LINGAO NUCLEAR POWER +5
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem mainly solved by the present invention is how to overcome the phenomenon that the output power of the existing steam turbine continuously fluctuates during a frequency adjustment

Method used

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  • A primary frequency modulation control method and device for a steam turbine in a nuclear power plant
  • A primary frequency modulation control method and device for a steam turbine in a nuclear power plant
  • A primary frequency modulation control method and device for a steam turbine in a nuclear power plant

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Embodiment 1

[0043] Please refer to Figure 1 and Figure 2 , the present application discloses a nuclear power plant steam turbine primary frequency control device, which includes a acquisition unit 11, a control unit 12, the following will be described separately.

[0044] Acquisition unit 11 for obtaining the amount of frequency regulation at the time of a single frequency regulation, and continuously obtaining the load feedback value of the steam turbine and the pressure feedback value of the steam valve.

[0045]It should be noted that the power grid often requires the steam turbine to increase or decrease the speed to change the output power when a frequency regulation occurs, so as to match the power load of the grid by changing the output power. Then, in the present embodiment, the amount of frequency modulation obtained at a time is based on the turbine's speed fixing value and speed feedback value to calculate, when a frequency modulation requires increasing the power or reducing the p...

Embodiment 2

[0061] Please refer to Figure 3 , on the basis of the primary frequency modulation control device disclosed in Example I, the present application discloses a nuclear power plant steam turbine primary frequency control method, which includes steps S210-S260, respectively described below.

[0062] Step S210, the control unit 12 obtains the amount of frequency regulation at the time of a frequency regulation, and continuously obtains the load feedback value of the steam turbine and the pressure feedback value of the steam valve.

[0063] In the present embodiment, the frequency modulation amount is the difference between the speed fixing value of the steam turbine and the speed feedback value relative to the percentage of the full load speed when the frequency regulation is a percentage, the load feedback value and load setting value of the steam turbine are percentages relative to the full load load of the steam turbine, and the pressure feedback value and pressure setting value of ...

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Abstract

The present invention relates to the technical field of a steam turbine regulation system of a million-kilowatt nuclear power plant, and specifically relates to a primary frequency modulation control method and device for a steam turbine in a nuclear power plant. Calculate the control amount of the steam valve, so that the steam turbine adjusts the opening of the steam valve according to the control amount of the steam valve; when it is judged that the pressure feedback value exceeds the fixed pressure value, according to the frequency modulation amount, the pressure feedback value, the pressure fixed value and the current value of the steam valve The control value is recalculated to obtain the new control value of the steam valve. When the pressure feedback value exceeds the pressure fixed value, the new control value obtained by recalculation is consistent with the upper limit value set by the pressure control, which overcomes the problem that the pressure control and power control differ by one frequency adjustment when switching, and can effectively avoid The instability of steam turbine output power and the instability of generator power generation caused by continuous fluctuation of new control quantity.

Description

Technical field [0001] The present invention relates to the technical field of million kilowatt-class nuclear power plant turbine regulation system, specifically to a nuclear power plant turbine primary frequency regulation control method and apparatus thereof. Background [0002] Nuclear power is currently recognized by the public as a kind of power resources, which is generated by the nuclear chain fission to generate thermal energy and then converted into electricity, the process will not pollute the air and will not cause energy depletion, therefore, nuclear power is widely considered to be clean, efficient, inexhaustible new electrical energy. However, compared with other power production processes, the production process of nuclear power has strict requirements for nuclear energy technology, safe operation and maintenance and emergency dispatch, and some nuclear power accidents that seriously damage the ecological environment make the staff of nuclear power plants tense the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01D17/10
CPCF01D17/10
Inventor 崔毓鸣夏红卫王博胡述
Owner LINGAO NUCLEAR POWER