CN113757633A - Water level control method and device for steam generator of nuclear power plant and computer equipment - Google Patents

Water level control method and device for steam generator of nuclear power plant and computer equipment Download PDF

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Publication number
CN113757633A
CN113757633A CN202111057494.3A CN202111057494A CN113757633A CN 113757633 A CN113757633 A CN 113757633A CN 202111057494 A CN202111057494 A CN 202111057494A CN 113757633 A CN113757633 A CN 113757633A
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operating power
module
value
preset
water supply
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CN202111057494.3A
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CN113757633B (en
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平嘉临
王春冰
谭国成
谢红云
卢超
段奇志
李季学
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China General Nuclear Power Corp
China Nuclear Power Engineering Co Ltd
CGN Power Co Ltd
Shenzhen China Guangdong Nuclear Engineering Design Co Ltd
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China General Nuclear Power Corp
China Nuclear Power Engineering Co Ltd
CGN Power Co Ltd
Shenzhen China Guangdong Nuclear Engineering Design Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B35/00—Control systems for steam boilers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00—Component parts or details of steam boilers
    • F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
    • F22B37/42—Applications, arrangements, or dispositions of alarm or automatic safety devices
    • F22B37/46—Applications, arrangements, or dispositions of alarm or automatic safety devices responsive to low or high water level, e.g. for checking, suppressing, extinguishing combustion in boilers
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21D—NUCLEAR POWER PLANT
    • G21D3/00—Control of nuclear power plant
    • G21D3/08—Regulation of any parameters in the plant
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Plasma & Fusion (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Control Of Turbines (AREA)
  • Control Of Steam Boilers And Waste-Gas Boilers (AREA)

Abstract

The application relates to a water level control method and device for a steam generator of a nuclear power plant, computer equipment and a storage medium. The method comprises the following steps: acquiring the current operating power of a unit to be controlled, and judging whether the current operating power exceeds a preset first operating power threshold value; if the current operating power does not exceed a preset first operating power threshold value, acquiring a main steam pressure value and a water supply pressure value, and controlling a valve position of a water supply regulating valve based on the main steam pressure value and the water supply pressure value; and if the current operating power exceeds a preset first operating power threshold value, acquiring the current operating power and the operating state of the water feeding pump, controlling the rotating speed of the water feeding pump based on the current operating power and the operating state of the water feeding pump, and simultaneously controlling the opening of a water feeding adjusting valve based on the current control power. By adopting the method, the self-adaptive adjustment of the water level control of the steam generator can be realized, and the stability of the water level control of the steam generator is improved.

Description

Water level control method and device for steam generator of nuclear power plant and computer equipment
Technical Field
The application relates to the technical field of nuclear power plant control operation, in particular to a method and a device for controlling the water level of a steam generator of a nuclear power plant, computer equipment and a storage medium.
Background
In a nuclear power unit, the adjustment of the water level of a steam generator is an important control means for ensuring the normal operation of the unit, and the water level of the steam generator is adjusted and controlled by adopting an adaptive adjustment technology suitable for the whole working condition of the unit, so that the water level stability of the steam generator is ensured, and the safety and the economical efficiency of the unit are improved.
The water level of the steam generator is automatically controlled by three pulses. The auxiliary control is mainly carried out on water level control, steam flow, feedwater flow and the like. And a feed pump is used for speed change adjustment to adapt to steam-water pressure difference, so that stable adjustment of the feed adjusting valve is ensured. And an operator auxiliary control function is set, and the function of the operator auxiliary control function is to forcibly close/open the feed water regulating valve when the water level exceeds the high/low limit value, regulate the water level and not trigger the shutdown threshold value. And under the working conditions from hot shutdown to cold shutdown, performing water level control on the steam generator by using a starting feed pump and an extremely-low feed valve adjusting mode.
In the prior art, the adjusting parameters of the water feeding pump adjusting module are fixed, and the water level of the steam generator cannot be stably controlled when the unit has different operating powers.
Disclosure of Invention
In view of the above, it is necessary to provide a method, an apparatus, a computer device and a storage medium for controlling a water level of a steam generator of a nuclear power plant, which can stably control the water level of the steam generator at different powers.
A nuclear power plant steam generator level control method, the method comprising:
acquiring the current operating power of a unit to be controlled, and judging whether the current operating power exceeds a preset first operating power threshold value;
if the current operating power does not exceed a preset first operating power threshold value, acquiring a main steam pressure value and a water supply pressure value, and controlling a valve position of a water supply regulating valve based on the main steam pressure value and the water supply pressure value;
and if the current operating power exceeds a preset first operating power threshold value, acquiring the current operating power and the operating state of the water feeding pump, controlling the rotating speed of the water feeding pump based on the current operating power and the operating state of the water feeding pump, and simultaneously controlling the opening of a water feeding adjusting valve based on the current control power.
In one embodiment, the method further comprises the following steps: acquiring a change value of the main steam pressure value, processing the change value through an integral module, and inputting a result processed by the integral module into a proportional coefficient self-adaptive adjusting module;
acquiring a pressure difference value between a main steam pressure value and a feedwater pressure value, and inputting the pressure difference value to an integral adaptive adjustment module;
and carrying out valve position control on the water supply regulating valve based on the proportional coefficient self-adaptive regulating module and the integral self-adaptive regulating module.
In one embodiment, the method further comprises the following steps: taking integral time in internal parameter variables of a water feeding pump rotating speed PI controller as an input variable;
inputting the current operating power and the operating state of the water feeding pump into a self-adaptive integral time operation module for processing to obtain a calculation result of the self-adaptive integral time operation module;
inputting the calculation result of the self-adaptive integral time operation module to an integral time input end of a water pump rotating speed PI controller to obtain an output value of the water pump rotating speed PI controller;
and controlling the rotating speed of the water feeding pump based on the output value of the water pump rotating speed PI controller.
In one embodiment, the method further comprises the following steps: inputting the current operating power to an adaptive adjusting module for processing to obtain the output of the adaptive adjusting module;
and controlling the opening of the water supply regulating valve based on the output of the self-adaptive regulating module.
In one embodiment, the method further comprises the following steps: acquiring a liquid level value of a steam generator, and judging whether the liquid level value of the steam generator belongs to a preset first high liquid level, a preset second high liquid level or a preset low liquid level;
and if the liquid level value of the steam generator belongs to a preset first high liquid level, a preset second high liquid level or a preset low liquid level, controlling a full-load water supply regulating valve and a low-load water supply regulating valve through a preset selector according to the output of the self-adaptive regulating module and the liquid level value of the steam generator and the output of the selector.
In one embodiment, the method further comprises the following steps: and if the liquid level value of the steam generator does not belong to a preset first high liquid level, a preset second high liquid level or a preset low liquid level, controlling the full-load water supply regulating valve and the low-load water supply regulating valve based on normal regulating valve position setting logic.
In one embodiment, the method further comprises the following steps: inputting the output value of the proportional coefficient self-adaptive adjusting module to a proportional adjusting coefficient input port of a PID adjusting module, inputting the output value of the integral self-adaptive adjusting module to an integral time coefficient input port of the PID adjusting module, and inputting the deviation value between the conversion function of the main steam pressure value and the feedwater pressure value to a deviation input port of the PID adjusting module;
and acquiring the output of the PID regulating module, and performing valve position control on the water supply regulating valve according to the output of the PID regulating module.
A nuclear power plant steam generator level control apparatus, the apparatus comprising:
the judging module is used for acquiring the current operating power of the unit to be controlled and judging whether the current operating power exceeds a preset first operating power threshold value;
the first control module is used for acquiring a main steam pressure value and a water supply pressure value when the current operating power does not exceed a preset first operating power threshold value, and carrying out valve position control on a water supply regulating valve based on the main steam pressure value and the water supply pressure value;
and the second control module is used for acquiring the current operating power and the operating state of the water feeding pump when the current operating power exceeds a preset first operating power threshold, controlling the rotating speed of the water feeding pump based on the current operating power and the operating state of the water feeding pump, and controlling the opening of the water feeding adjusting valve based on the current control power.
A computer device comprising a memory and a processor, the memory storing a computer program, the processor implementing the following steps when executing the computer program:
acquiring the current operating power of a unit to be controlled, and judging whether the current operating power exceeds a preset first operating power threshold value;
if the current operating power does not exceed a preset first operating power threshold value, acquiring a main steam pressure value and a water supply pressure value, and controlling a valve position of a water supply regulating valve based on the main steam pressure value and the water supply pressure value;
and if the current operating power exceeds a preset first operating power threshold value, acquiring the current operating power and the operating state of the water feeding pump, controlling the rotating speed of the water feeding pump based on the current operating power and the operating state of the water feeding pump, and simultaneously controlling the opening of a water feeding adjusting valve based on the current control power.
A computer-readable storage medium, on which a computer program is stored which, when executed by a processor, carries out the steps of:
acquiring the current operating power of a unit to be controlled, and judging whether the current operating power exceeds a preset first operating power threshold value;
if the current operating power does not exceed a preset first operating power threshold value, acquiring a main steam pressure value and a water supply pressure value, and controlling a valve position of a water supply regulating valve based on the main steam pressure value and the water supply pressure value;
and if the current operating power exceeds a preset first operating power threshold value, acquiring the current operating power and the operating state of the water feeding pump, controlling the rotating speed of the water feeding pump based on the current operating power and the operating state of the water feeding pump, and simultaneously controlling the opening of a water feeding adjusting valve based on the current control power.
According to the nuclear power plant steam generator water level control method, the nuclear power plant steam generator water level control device, the computer equipment and the storage medium, the current operation power of the unit to be controlled is obtained, whether the current operation power exceeds a preset first operation power threshold value or not is judged, if the current operation power does not exceed the preset first operation power threshold value, a main steam pressure value and a water supply pressure value are obtained, and the valve position control is carried out on the water supply regulating valve based on the main steam pressure value and the water supply pressure value; if the current operating power exceeds a preset first operating power threshold value, the current operating power and the operating state of the water feeding pump are obtained, the rotating speed of the water feeding pump is controlled based on the current operating power and the operating state of the water feeding pump, and meanwhile, the opening of the water feeding adjusting valve is controlled based on the current control power, so that the self-adaptive adjustment of the water level control of the steam generator is realized, and the stability of the water level control of the steam generator is improved.
Drawings
FIG. 1 is a diagram of an embodiment of an environment in which a method for controlling water levels in a steam generator of a nuclear power plant is implemented;
FIG. 2 is a schematic flow diagram of a method for controlling water level in a steam generator of a nuclear power plant according to one embodiment;
FIG. 3 is a flow chart illustrating the steps of the adaptive control for activating the feedwater regulating valve in one embodiment;
FIG. 4 is a schematic flow chart illustrating the control of the rotational speed of the feed pump according to an embodiment;
FIG. 5 is a schematic diagram of an adaptive throttling for operator-assisted control of a feedwater regulating valve in one embodiment;
FIG. 6 is a block diagram of a nuclear power plant steam generator level control apparatus according to one embodiment;
FIG. 7 is a diagram illustrating an internal structure of a computer device according to an embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
The water level control method of the steam generator of the nuclear power plant can be applied to the application environment shown in the figure 1. Wherein the terminal 102 communicates with the server 104 via a network. For example, the server 104 is configured to obtain a current operating power of the unit to be controlled, and determine whether the current operating power exceeds a preset first operating power threshold; if the current operating power does not exceed a preset first operating power threshold value, acquiring a main steam pressure value and a water supply pressure value, and controlling a valve position of a water supply regulating valve based on the main steam pressure value and the water supply pressure value; and if the current operating power exceeds a preset first operating power threshold value, acquiring the current operating power and the operating state of the water feeding pump, controlling the rotating speed of the water feeding pump based on the current operating power and the operating state of the water feeding pump, and simultaneously controlling the opening of a water feeding adjusting valve based on the current control power.
The terminal 102 may be, but is not limited to, various nuclear power plant equipment parameter acquiring and monitoring devices, and the server 104 may be implemented by an independent server or a server cluster formed by a plurality of servers.
The operating modes of a pressurized water reactor nuclear power plant are generally divided into six modes, namely power operation, normal shutdown of a steam generator during cooling, normal shutdown of a waste heat discharge cooling system, shutdown maintenance and the like. In the six modes, the operation of the Steam Generator (SG) covers the range of the reactor coolant pressure from 15.5Mpa to 2.7Mpa, the temperature from 310 ℃ to 120 ℃ and the electric power from 100% to 0%, the main parameter variation range is large, the related equipment is more, the influence on the unit safety is large, and the control of the water level of the steam generator becomes a key factor for the unit operation control. Steam generator level control is important, not to mention perfect statistics, since the events of shutdown caused by improper control of steam generator level account for more than 60% of unplanned shutdown. The application describes a technology for self-adaptive automatic control of the water level of a steam generator under normal and abnormal running conditions of a unit.
In one embodiment, as shown in fig. 2, there is provided a method for controlling water level of steam generator in nuclear power plant, which is illustrated by way of example as applied to the terminal in fig. 1, and comprises the following steps:
step 202, obtaining the current operating power of the unit to be controlled, and judging whether the current operating power exceeds a preset first operating power threshold.
Specifically, the current operating power of the unit to be controlled is compared with a preset first operating power threshold, and whether the current operating power exceeds the preset first operating power threshold is judged, so that the water supply regulating valve can be controlled according to the current operating power.
And 204, if the current operating power does not exceed a preset first operating power threshold, acquiring a main steam pressure value and a feedwater pressure value, and controlling the valve position of a feedwater regulating valve based on the main steam pressure value and the feedwater pressure value.
Specifically, when the current operating power does not exceed a preset first operating power threshold, a main steam pressure value and a feedwater pressure value of the unit to be controlled are obtained, and the main steam pressure value and the feedwater pressure value of the unit to be controlled are based on the main steam pressure value and the feedwater pressure value of the unit to be controlled. And the water supply pressure value controls the valve position of the water supply regulating valve. For example, when the first operating power threshold is set to be 2%, and when the current operating power does not exceed 2%, in the normal starting and stopping process of the unit, the water supply system regulating valve is started to be matched with the minimum regulating valve of the water supply flow control system for use, the minimum regulating valve regulates the liquid level of the steam generator during the period from hot shutdown to operation of the waste heat discharge system, and the temperature of the unit is mainly reduced from 290 ℃ to 120 ℃, and the pressure is 15.5 to 2.7 MPa. The water supply system regulating valve is started to regulate the water supply pressure, the pressure of the water supply system regulating valve is kept dynamically stable in the working condition, however, the two valves are often coupled in actual operation, so that the regulation is unstable, the water supply pressure and the flow fluctuation are large, the liquid level of the steam generator is unstable, and the shutdown risk exists. And at the moment, carrying out valve position control on the water supply regulating valve based on the main steam pressure value and the water supply pressure value.
And step 206, if the current operating power exceeds a preset first operating power threshold, acquiring the current operating power and the operating state of the water feeding pump, controlling the rotating speed of the water feeding pump based on the current operating power and the operating state of the water feeding pump, and controlling the opening of a water feeding adjusting valve based on the current control power.
The rotating speed control of the water feeding pump realizes stepless speed regulation through a speed regulation type hydraulic coupler, and electro-hydraulic position control (VEHS) of the hydraulic coupler is a component part of the hydraulic coupler, so that the position of the scoop tube can be accurately and continuously controlled. The VEHS is a compact unit assembly. The core of the water feeding pump rotation speed control lies in that the position of a scoop tube in actual operation is controlled by adjusting a positioning switch and a magnetic controller through electric signals, and the output rotation speed of the hydraulic coupler is determined by the position of the scoop tube. Through the VEHS, continuously variable control of the driven device can be realized.
When the current running power exceeds a preset first running power threshold value, for example, when the current running power exceeds 2%, obtaining the current running power and a running state of a feed pump, wherein the running state of the feed pump comprises a single-pump mode and a double-pump mode; the rotating speed of the water feeding pump is controlled based on the current running power and the running state of the water feeding pump, the output of an actual electric signal is controlled by a technology of dynamically adjusting PID parameters, the equipment of the water feeding pump is not changed, and the rotating speed of the water feeding pump is adjusted at an upstream input part.
Meanwhile, the opening of the water supply regulating valve is controlled based on the current control power, so that the problem that the water level of the steam generator vibrates because the water supply normal regulating system still works after the action of the auxiliary control function of an operator is avoided, and if the disturbance of the auxiliary control function of the operator is too large, the water supply normal regulation cannot follow up is solved.
In the water level control method for the steam generator of the nuclear power plant, the current operating power of the unit to be controlled is obtained, whether the current operating power exceeds a preset first operating power threshold value or not is judged, if the current operating power does not exceed the preset first operating power threshold value, a main steam pressure value and a water supply pressure value are obtained, and valve position control is carried out on a water supply regulating valve based on the main steam pressure value and the water supply pressure value; if the current operating power exceeds a preset first operating power threshold value, the current operating power and the operating state of the water feeding pump are obtained, the rotating speed of the water feeding pump is controlled based on the current operating power and the operating state of the water feeding pump, and meanwhile, the opening of the water feeding adjusting valve is controlled based on the current control power, so that the self-adaptive adjustment of the water level control of the steam generator is realized, and the stability of the water level control of the steam generator is improved.
In one embodiment, the controlling the valve position of the feed water regulating valve based on the main steam pressure value and the feed water pressure value includes:
acquiring a change value of the main steam pressure value, processing the change value through an integral module, and inputting a result processed by the integral module into a proportional coefficient self-adaptive adjusting module;
acquiring a pressure difference value between a main steam pressure value and a feedwater pressure value, and inputting the pressure difference value to an integral adaptive adjustment module;
and carrying out valve position control on the water supply regulating valve based on the proportional coefficient self-adaptive regulating module and the integral self-adaptive regulating module.
Specifically, in the normal starting and stopping process of the unit, a water supply system regulating valve is started to be matched with a minimum regulating valve of a water supply flow control system for use, the minimum regulating valve regulates the liquid level of a steam generator during the period from thermal shutdown to operation of a waste heat discharge system, and the temperature of the unit is mainly reduced from 290 ℃ to 120 ℃ and the pressure is 15.5MPa to 2.7 MPa. The water supply system regulating valve is started to regulate the water supply pressure, the pressure of the water supply system regulating valve is kept dynamically stable in the working condition, however, the two valves are often coupled in actual operation, so that the regulation is unstable, the water supply pressure and the flow fluctuation are large, the liquid level of the steam generator is unstable, and the shutdown risk exists. Because the set pressure value of the regulating valve is dynamically changed, when the water supply minimum regulating valve is regulated, the actual water supply pressure can be changed, the change can start the regulating valve of the water supply system to act, the actions of the water supply system and the regulating valve are in the same direction, the disturbance is increased, the mutual alleviation cannot be realized, and the regulation is unstable.
Fig. 3 is a schematic flow chart of a step of starting adaptive control of the feed water regulating valve in an embodiment, as shown in fig. 3, a change value of the main steam pressure value is obtained, the change value is processed by an integration module, the integration module is used for filtering signal burrs sampled at a main steam pressure value measuring point, a result processed by the integration module is input to a proportional coefficient adaptive adjustment module, a pressure difference value between the main steam pressure value and the feed water pressure value is obtained, the pressure difference value is input to the integral adaptive adjustment module, and valve position control is performed on the feed water regulating valve based on the proportional coefficient adaptive adjustment module and the integral adaptive adjustment module. In the processing process, the PID regulator has different proportional regulation coefficients under different main steam pressure values; different pressure differences between the main steam pressure value and the feed water pressure value have different integral time coefficients, when the pressure difference is increased, the PID adjusting time is prolonged, the unstable adjusting trend is relieved, and the integral adjusting characteristic is improved. In the adaptive regulation module, the specific determination of the output value is related to the characteristics of the starting water supply regulating valve of the actual unit, and generally needs to be determined through field debugging conditions.
In the embodiment, the change value of the main steam pressure value is obtained, the change value is processed through the integral module, the result processed by the integral module is input to the proportional coefficient adaptive adjustment module, the pressure difference value between the main steam pressure value and the water supply pressure value is obtained, the pressure difference value is input to the integral adaptive adjustment module, and the water supply adjustment valve is subjected to valve position control based on the proportional coefficient adaptive adjustment module and the integral adaptive adjustment module, so that the water level of the steam generator is kept stable in operation in a variable working condition, and unplanned shutdown caused by severe water level change is reduced.
In one embodiment, the controlling the rotation speed of the feed water pump based on the current operation power and the operation state of the feed water pump comprises:
taking integral time in internal parameter variables of a water feeding pump rotating speed PI controller as an input variable;
inputting the current operating power and the operating state of the water feeding pump into a self-adaptive integral time operation module for processing to obtain a calculation result of the self-adaptive integral time operation module;
inputting the calculation result of the self-adaptive integral time operation module to an integral time input end of a water pump rotating speed PI controller to obtain an output value of the water pump rotating speed PI controller;
and controlling the rotating speed of the water feeding pump based on the output value of the water pump rotating speed PI controller.
In the control logic of the existing PI module, 2 input variables are set values of steam-water pressure difference values and measured values of the steam-water pressure difference values; the output value is a set value of the rotating speed, and the internal parameters of the rotating speed are a proportional regulating parameter, an integral time parameter and the like. Wherein the internal parameters are fixed parameters which are not adjusted after being set. The set value of the steam-water pressure difference value is determined according to the steam flow of the unit, the load condition of the unit is represented, and the operating condition of power from about 10% to 100% is covered. The water feeding pump is divided into a single pump operation mode and a double pump operation mode under different power levels, the water feeding pressure of the single pump and the double pump is different, the actual steam-water pressure difference changes greatly under the condition of low load, the rotating speed of the water feeding pump is unstable to adjust, the water feeding pump vibrates, only two input values are adjusted, and no readjustment means is provided.
In the embodiment, a readjustment means is added, and a self-adaptive adjustment method is introduced, so that the parameters of the PI module can be dynamically adjusted. Fig. 4 is a schematic flow diagram of a water-feeding pump rotation speed control in an embodiment, as shown in fig. 4, the integral time in the internal parameter variable of the water-feeding pump rotation speed PI controller is used as an input variable, and the current operating power and the water-feeding pump operating state are input to the adaptive integral time operation module for processing, so as to obtain the calculation result of the adaptive integral time operation module; and inputting the calculation result of the self-adaptive integral time operation module to an integral time input end of the water pump rotating speed PI controller to obtain an output value of the water pump rotating speed PI controller. When the unit is in variable power, different equipment is in operation and the steam-water pressure difference changes greatly, the stable output of the water feeding pump rotating speed PI controller can be met, and the stability of the steam generator water feeding regulation is ensured. Meanwhile, a selection mode of fixed time parameters is set, and fixed parameter adjustment can be performed according to the specific operation condition on site. In the adaptive integral time operation module, the specific determination of the integral time value is related to the characteristics of the actual unit feed water pump, and generally needs to be determined through field debugging conditions, and in this embodiment, the specific determination is a reference value determined in an engineering simulator with precise modeling.
In this embodiment, the integral time in the internal parameter variable of the water feed pump rotational speed PI controller is used as an input variable, the current operating power and the water feed pump operating state are input to the adaptive integral time operation module for processing, the calculation result of the adaptive integral time operation module is obtained, the calculation result of the adaptive integral time operation module is input to the integral time input end of the water pump rotational speed PI controller, the output value of the water pump rotational speed PI controller is obtained, and finally the rotational speed of the water feed pump is controlled based on the output value of the water pump rotational speed PI controller, so that the stable output of the water feed pump rotational speed PI controller can be met, and the stable water supply regulation of the steam generator is ensured.
In one embodiment, said simultaneously controlling the opening of the feedwater regulating valve based on said current control power comprises:
inputting the current operating power to an adaptive adjusting module for processing to obtain the output of the adaptive adjusting module;
and controlling the opening of the water supply regulating valve based on the output of the self-adaptive regulating module.
In the existing steam generator water level control logics, the control logics of the auxiliary control functions of steam generator water level operators on different power platforms are the same, the auxiliary control function of a high operator is triggered, and a full-load water supply regulating valve and a low-load water supply regulating valve are closed simultaneously; and triggering the auxiliary control function of the low operator, and fully opening the full-load water supply regulating valve and the low-load water supply regulating valve simultaneously. The existing logic can normally recover liquid level regulation when the power is more than 50%, and can not meet the requirement of a criterion when the power is less than 50%, particularly, an operator auxiliary control function is triggered under a low-power platform, an ARE valve is excessively adjusted, the liquid level of a steam generator is oscillated and dispersed, and finally, pile jump can be caused. The reason is that the normal water supply adjusting system still works after the action of the auxiliary control function of the operator, and if the disturbance of the auxiliary control function of the operator is too large, the normal water supply adjusting system cannot follow up, so that the water level of the steam generator vibrates. In this embodiment, the current operating power is input to the adaptive adjustment module for processing, the output of the adaptive adjustment module is obtained, and the opening of the water supply adjustment valve is controlled based on the output of the adaptive adjustment module.
In this embodiment, when the opening of the water supply regulating valve is controlled based on the current control power, the current operating power is input to the adaptive adjustment module to be processed, the output of the adaptive adjustment module is obtained, and the opening of the water supply regulating valve is controlled based on the output of the adaptive adjustment module. In this embodiment, because the problem of simultaneous adjustment of the large and small valves of the water supply regulating valve exists, and the adjustment matching relationship between the full-load water supply regulating valve and the low-load water supply regulating valve needs to be considered, a limit module is further provided, the lower limit of the self-adaptive adjustment output of the limit module is the upper limit of the adjustment of the low-load water supply regulating valve, and the upper limit of the self-adaptive adjustment output of the limit module is 100% of the valve opening, so that the problem of unstable adjustment caused by the action of an operator auxiliary control function under different power platforms is solved.
In one embodiment, the controlling the opening degree of the feedwater regulating valve based on the output of the adaptive regulating module includes:
acquiring a liquid level value of a steam generator, and judging whether the liquid level value of the steam generator belongs to a preset first high liquid level, a preset second high liquid level or a preset low liquid level;
and if the liquid level value of the steam generator belongs to a preset first high liquid level, a preset second high liquid level or a preset low liquid level, controlling a full-load water supply regulating valve and a low-load water supply regulating valve through a preset selector according to the output of the self-adaptive regulating module and the liquid level value of the steam generator and the output of the selector.
Specifically, fig. 5 is a schematic diagram of an auxiliary control adaptive throttling process of an operator of a water supply regulating valve in one embodiment, as shown in fig. 5, a liquid level value of a steam generator is obtained, and whether the liquid level value of the steam generator belongs to a preset first high liquid level, a preset second high liquid level or a preset low liquid level is judged; if the liquid level value of the steam generator belongs to a preset first high liquid level, a preset second high liquid level or a preset low liquid level, the full-load water supply regulating valve and the low-load water supply regulating valve are controlled according to the output of the self-adaptive regulating module and the liquid level value of the steam generator through a preset selector according to the output of the self-adaptive regulating module and the output of the selector, the output value of the self-adaptive regulating module is used as an opening limiting value of the water supply regulating valve, and due to the fact that the size valve and the valve of the water supply regulating valve are simultaneously regulated, the regulating matching relation of the full-load water supply regulating valve and the low-load water supply regulating valve needs to be considered. Through the set limit module, the lower limit of the self-adaptive regulation output of the self-adaptive regulation module is the upper limit of the regulation of the low-load water supply regulating valve, and the upper limit is 100% of the valve opening. Because there is the steam generator and predetermines first high liquid level, predetermine the second high liquid level or predetermine three kinds of circumstances of low liquid level at the liquid level, the scheme sets up three selection module and selects respectively these three kinds of circumstances. Finally, the output of the selector is used as the valve position control signals of the full-load water supply regulating valve and the low-load water supply regulating valve. Only when the steam generator is triggered to preset a first high liquid level, a second high liquid level or a low liquid level, the auxiliary control function of the operator of the water supply regulating valve can act, and valve position control signals of the full-load water supply regulating valve and the low-load water supply regulating valve are automatically output.
In this embodiment, acquire steam generator's liquid level value, judge whether steam generator's liquid level value belongs to and predetermines first high liquid level, predetermine second high liquid level or predetermine low liquid level, when steam generator's liquid level value belongs to and predetermines first high liquid level, predetermine second high liquid level or predetermine when low liquid level, output and steam generator's liquid level value according to self-adaptation adjusting module is through predetermined selector, control water supply regulating valve and low-load water supply regulating valve according to the output of selector, the regulation unstable problem that the operator auxiliary control function action brought under different power platforms has been solved.
In one embodiment, the controlling the opening degree of the feedwater regulating valve based on the output of the adaptive regulating module further comprises:
and if the liquid level value of the steam generator does not belong to a preset first high liquid level, a preset second high liquid level or a preset low liquid level, controlling the full-load water supply regulating valve and the low-load water supply regulating valve based on normal regulating valve position setting logic.
Specifically, if the level value of the steam generator does not belong to the preset first high level, the preset second high level or the preset low level, the valve position control signals of the full-load water supply regulating valve and the low-load water supply regulating valve are controlled by the normal regulating valve position setting logic. In the adaptive regulation module, the specific determination of the output value is related to the characteristics of the water supply regulating valve of the actual unit, and generally needs to be determined through field debugging conditions, and the full-load water supply regulating valve and the low-load water supply regulating valve are controlled based on normal regulating valve position setting logic.
In this embodiment, if the liquid level value of the steam generator does not belong to the preset first high liquid level, the preset second high liquid level or the preset low liquid level, the full-load water supply regulating valve and the low-load water supply regulating valve are controlled based on the normal regulating valve level setting logic, and the problem of unstable regulation caused by the action of the auxiliary control function of an operator under different power platforms is solved.
In one embodiment, the controlling the valve position of the feed water regulating valve based on the proportional coefficient adaptive adjusting module and the integral adaptive adjusting module comprises:
inputting the output value of the proportional coefficient self-adaptive adjusting module to a proportional adjusting coefficient input port of a PID adjusting module, inputting the output value of the integral self-adaptive adjusting module to an integral time coefficient input port of the PID adjusting module, and inputting the deviation value between the conversion function of the main steam pressure value and the feedwater pressure value to a deviation input port of the PID adjusting module;
and acquiring the output of the PID regulating module, and performing valve position control on the water supply regulating valve according to the output of the PID regulating module.
Specifically, when the water supply regulating valve is subjected to valve position control based on the proportional coefficient adaptive adjusting module and the integral adaptive adjusting module, the output value of the proportional coefficient adaptive adjusting module is input to a proportional adjusting coefficient input port of the PID adjusting module, then the output value of the integral adaptive adjusting module is input to an integral time coefficient input port of the PID adjusting module, finally, the deviation value between the conversion function of the main steam pressure value and the water supply pressure value is input to a deviation input port of the PID adjusting module, the output of the PID adjusting module is obtained, and the valve position control is performed on the water supply regulating valve according to the output of the PID adjusting module.
In the embodiment, the output value of the proportional coefficient adaptive regulation module is input to the proportional regulation coefficient input port of the PID regulation module, the output value of the integral adaptive regulation module is input to the integral time coefficient input port of the PID regulation module, the deviation value between the conversion function of the main steam pressure value and the feed water pressure value is input to the deviation input port of the PID regulation module, the output of the PID regulation module is obtained, and the feed water regulation valve is subjected to valve position control according to the output of the PID regulation module, so that the water level of the steam generator is kept stable in operation under variable working conditions, and unplanned shutdown caused by severe water level change is reduced.
It should be understood that although the various steps in the flow charts of fig. 2-5 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in fig. 2-5 may include multiple steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, which are not necessarily performed in sequence, but may be performed in turn or alternately with other steps or at least some of the other steps.
In one embodiment, as shown in fig. 6, there is provided a nuclear power plant steam generator water level control apparatus including: a determination module 601, a first control module 602, and a second control module 603, wherein:
the determining module 601 is configured to obtain a current operating power of the unit to be controlled, and determine whether the current operating power exceeds a preset first operating power threshold.
The first control module 602 is configured to, when the current operating power does not exceed a preset first operating power threshold, obtain a main steam pressure value and a feedwater pressure value, and perform valve position control on a feedwater regulating valve based on the main steam pressure value and the feedwater pressure value.
And a second control module 603, configured to, when the current operating power exceeds a preset first operating power threshold, obtain the current operating power and an operating state of the water-feeding pump, control a rotation speed of the water-feeding pump based on the current operating power and the operating state of the water-feeding pump, and control an opening of a water-feeding regulating valve based on the current control power.
In one embodiment, the first control module 602 is further configured to: acquiring a change value of the main steam pressure value, processing the change value through an integral module, and inputting a result processed by the integral module into a proportional coefficient self-adaptive adjusting module; acquiring a pressure difference value between a main steam pressure value and a feedwater pressure value, and inputting the pressure difference value to an integral adaptive adjustment module; and carrying out valve position control on the water supply regulating valve based on the proportional coefficient self-adaptive regulating module and the integral self-adaptive regulating module.
In one embodiment, the second control module 603 is further configured to: taking integral time in internal parameter variables of a water feeding pump rotating speed PI controller as an input variable; inputting the current operating power and the operating state of the water feeding pump into a self-adaptive integral time operation module for processing to obtain a calculation result of the self-adaptive integral time operation module; inputting the calculation result of the self-adaptive integral time operation module to an integral time input end of a water pump rotating speed PI controller to obtain an output value of the water pump rotating speed PI controller; and controlling the rotating speed of the water feeding pump based on the output value of the water pump rotating speed PI controller.
In one embodiment, the second control module 603 is further configured to: inputting the current operating power to an adaptive adjusting module for processing to obtain the output of the adaptive adjusting module; and controlling the opening of the water supply regulating valve based on the output of the self-adaptive regulating module.
In one embodiment, the second control module 603 is further configured to: acquiring a liquid level value of a steam generator, and judging whether the liquid level value of the steam generator belongs to a preset first high liquid level, a preset second high liquid level or a preset low liquid level; and if the liquid level value of the steam generator belongs to a preset first high liquid level, a preset second high liquid level or a preset low liquid level, controlling a full-load water supply regulating valve and a low-load water supply regulating valve through a preset selector according to the output of the self-adaptive regulating module and the liquid level value of the steam generator and the output of the selector.
In one embodiment, the second control module 603 is further configured to: and if the liquid level value of the steam generator does not belong to a preset first high liquid level, a preset second high liquid level or a preset low liquid level, controlling the full-load water supply regulating valve and the low-load water supply regulating valve based on normal regulating valve position setting logic.
In one embodiment, the first control module 602 is further configured to: inputting the output value of the proportional coefficient self-adaptive adjusting module to a proportional adjusting coefficient input port of a PID adjusting module, inputting the output value of the integral self-adaptive adjusting module to an integral time coefficient input port of the PID adjusting module, and inputting the deviation value between the conversion function of the main steam pressure value and the feedwater pressure value to a deviation input port of the PID adjusting module; and acquiring the output of the PID regulating module, and performing valve position control on the water supply regulating valve according to the output of the PID regulating module.
The nuclear power plant steam generator water level control device acquires the current operating power of a unit to be controlled, judges whether the current operating power exceeds a preset first operating power threshold value, acquires a main steam pressure value and a water supply pressure value if the current operating power does not exceed the preset first operating power threshold value, and controls the valve position of a water supply regulating valve based on the main steam pressure value and the water supply pressure value; if the current operating power exceeds a preset first operating power threshold value, the current operating power and the operating state of the water feeding pump are obtained, the rotating speed of the water feeding pump is controlled based on the current operating power and the operating state of the water feeding pump, and meanwhile, the opening of the water feeding adjusting valve is controlled based on the current control power, so that the self-adaptive adjustment of the water level control of the steam generator is realized, and the stability of the water level control of the steam generator is improved.
For specific definition of the water level control device of the steam generator of the nuclear power plant, reference is made to the definition of the water level control method of the steam generator of the nuclear power plant, and the detailed description is omitted here. All or part of each module in the water level control device of the steam generator of the nuclear power plant can be realized by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
In one embodiment, a computer device is provided, which may be a server, the internal structure of which may be as shown in fig. 7. The computer device includes a processor, a memory, and a network interface connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement a nuclear power plant steam generator level control method.
Those skilled in the art will appreciate that the architecture shown in fig. 7 is merely a block diagram of some of the structures associated with the disclosed aspects and is not intended to limit the computing devices to which the disclosed aspects apply, as particular computing devices may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
In one embodiment, a computer device is provided, comprising a memory and a processor, the memory having a computer program stored therein, the processor implementing the following steps when executing the computer program:
acquiring the current operating power of a unit to be controlled, and judging whether the current operating power exceeds a preset first operating power threshold value;
if the current operating power does not exceed a preset first operating power threshold value, acquiring a main steam pressure value and a water supply pressure value, and controlling a valve position of a water supply regulating valve based on the main steam pressure value and the water supply pressure value;
and if the current operating power exceeds a preset first operating power threshold value, acquiring the current operating power and the operating state of the water feeding pump, controlling the rotating speed of the water feeding pump based on the current operating power and the operating state of the water feeding pump, and simultaneously controlling the opening of a water feeding adjusting valve based on the current control power.
In one embodiment, the processor, when executing the computer program, further performs the steps of: acquiring a change value of the main steam pressure value, processing the change value through an integral module, and inputting a result processed by the integral module into a proportional coefficient self-adaptive adjusting module; acquiring a pressure difference value between a main steam pressure value and a feedwater pressure value, and inputting the pressure difference value to an integral adaptive adjustment module; and carrying out valve position control on the water supply regulating valve based on the proportional coefficient self-adaptive regulating module and the integral self-adaptive regulating module.
In one embodiment, the processor, when executing the computer program, further performs the steps of: taking integral time in internal parameter variables of a water feeding pump rotating speed PI controller as an input variable; inputting the current operating power and the operating state of the water feeding pump into a self-adaptive integral time operation module for processing to obtain a calculation result of the self-adaptive integral time operation module; inputting the calculation result of the self-adaptive integral time operation module to an integral time input end of a water pump rotating speed PI controller to obtain an output value of the water pump rotating speed PI controller; and controlling the rotating speed of the water feeding pump based on the output value of the water pump rotating speed PI controller.
In one embodiment, the processor, when executing the computer program, further performs the steps of: inputting the current operating power to an adaptive adjusting module for processing to obtain the output of the adaptive adjusting module; and controlling the opening of the water supply regulating valve based on the output of the self-adaptive regulating module.
In one embodiment, the processor, when executing the computer program, further performs the steps of: acquiring a liquid level value of a steam generator, and judging whether the liquid level value of the steam generator belongs to a preset first high liquid level, a preset second high liquid level or a preset low liquid level; and if the liquid level value of the steam generator belongs to a preset first high liquid level, a preset second high liquid level or a preset low liquid level, controlling a full-load water supply regulating valve and a low-load water supply regulating valve through a preset selector according to the output of the self-adaptive regulating module and the liquid level value of the steam generator and the output of the selector.
In one embodiment, the processor, when executing the computer program, further performs the steps of: and if the liquid level value of the steam generator does not belong to a preset first high liquid level, a preset second high liquid level or a preset low liquid level, controlling the full-load water supply regulating valve and the low-load water supply regulating valve based on normal regulating valve position setting logic.
In one embodiment, the processor, when executing the computer program, further performs the steps of: inputting the output value of the proportional coefficient self-adaptive adjusting module to a proportional adjusting coefficient input port of a PID adjusting module, inputting the output value of the integral self-adaptive adjusting module to an integral time coefficient input port of the PID adjusting module, and inputting the deviation value between the conversion function of the main steam pressure value and the feedwater pressure value to a deviation input port of the PID adjusting module; and acquiring the output of the PID regulating module, and performing valve position control on the water supply regulating valve according to the output of the PID regulating module.
The computer equipment acquires the current operating power of the unit to be controlled, judges whether the current operating power exceeds a preset first operating power threshold value, acquires a main steam pressure value and a water supply pressure value if the current operating power does not exceed the preset first operating power threshold value, and controls the valve position of the water supply regulating valve based on the main steam pressure value and the water supply pressure value; if the current operating power exceeds a preset first operating power threshold value, the current operating power and the operating state of the water feeding pump are obtained, the rotating speed of the water feeding pump is controlled based on the current operating power and the operating state of the water feeding pump, and meanwhile, the opening of the water feeding adjusting valve is controlled based on the current control power, so that the self-adaptive adjustment of the water level control of the steam generator is realized, and the stability of the water level control of the steam generator is improved.
In one embodiment, a computer-readable storage medium is provided, having a computer program stored thereon, which when executed by a processor, performs the steps of:
acquiring the current operating power of a unit to be controlled, and judging whether the current operating power exceeds a preset first operating power threshold value;
if the current operating power does not exceed a preset first operating power threshold value, acquiring a main steam pressure value and a water supply pressure value, and controlling a valve position of a water supply regulating valve based on the main steam pressure value and the water supply pressure value;
and if the current operating power exceeds a preset first operating power threshold value, acquiring the current operating power and the operating state of the water feeding pump, controlling the rotating speed of the water feeding pump based on the current operating power and the operating state of the water feeding pump, and simultaneously controlling the opening of a water feeding adjusting valve based on the current control power.
In one embodiment, the computer program when executed by the processor further performs the steps of: acquiring a change value of the main steam pressure value, processing the change value through an integral module, and inputting a result processed by the integral module into a proportional coefficient self-adaptive adjusting module; acquiring a pressure difference value between a main steam pressure value and a feedwater pressure value, and inputting the pressure difference value to an integral adaptive adjustment module; and carrying out valve position control on the water supply regulating valve based on the proportional coefficient self-adaptive regulating module and the integral self-adaptive regulating module.
In one embodiment, the computer program when executed by the processor further performs the steps of: taking integral time in internal parameter variables of a water feeding pump rotating speed PI controller as an input variable; inputting the current operating power and the operating state of the water feeding pump into a self-adaptive integral time operation module for processing to obtain a calculation result of the self-adaptive integral time operation module; inputting the calculation result of the self-adaptive integral time operation module to an integral time input end of a water pump rotating speed PI controller to obtain an output value of the water pump rotating speed PI controller; and controlling the rotating speed of the water feeding pump based on the output value of the water pump rotating speed PI controller.
In one embodiment, the computer program when executed by the processor further performs the steps of: inputting the current operating power to an adaptive adjusting module for processing to obtain the output of the adaptive adjusting module; and controlling the opening of the water supply regulating valve based on the output of the self-adaptive regulating module.
In one embodiment, the computer program when executed by the processor further performs the steps of: acquiring a liquid level value of a steam generator, and judging whether the liquid level value of the steam generator belongs to a preset first high liquid level, a preset second high liquid level or a preset low liquid level; and if the liquid level value of the steam generator belongs to a preset first high liquid level, a preset second high liquid level or a preset low liquid level, controlling a full-load water supply regulating valve and a low-load water supply regulating valve through a preset selector according to the output of the self-adaptive regulating module and the liquid level value of the steam generator and the output of the selector.
In one embodiment, the computer program when executed by the processor further performs the steps of: and if the liquid level value of the steam generator does not belong to a preset first high liquid level, a preset second high liquid level or a preset low liquid level, controlling the full-load water supply regulating valve and the low-load water supply regulating valve based on normal regulating valve position setting logic.
In one embodiment, the computer program when executed by the processor further performs the steps of: inputting the output value of the proportional coefficient self-adaptive adjusting module to a proportional adjusting coefficient input port of a PID adjusting module, inputting the output value of the integral self-adaptive adjusting module to an integral time coefficient input port of the PID adjusting module, and inputting the deviation value between the conversion function of the main steam pressure value and the feedwater pressure value to a deviation input port of the PID adjusting module; and acquiring the output of the PID regulating module, and performing valve position control on the water supply regulating valve according to the output of the PID regulating module.
The storage medium acquires the current operating power of the unit to be controlled, judges whether the current operating power exceeds a preset first operating power threshold value or not, acquires a main steam pressure value and a water supply pressure value if the current operating power does not exceed the preset first operating power threshold value, and controls the valve position of the water supply regulating valve based on the main steam pressure value and the water supply pressure value; if the current operating power exceeds a preset first operating power threshold value, the current operating power and the operating state of the water feeding pump are obtained, the rotating speed of the water feeding pump is controlled based on the current operating power and the operating state of the water feeding pump, and meanwhile, the opening of the water feeding adjusting valve is controlled based on the current control power, so that the self-adaptive adjustment of the water level control of the steam generator is realized, and the stability of the water level control of the steam generator is improved.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database or other medium used in the embodiments provided herein can include at least one of non-volatile and volatile memory. Non-volatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical storage, or the like. Volatile Memory can include Random Access Memory (RAM) or external cache Memory. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), among others.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. A method of nuclear power plant steam generator level control, the method comprising:
acquiring the current operating power of a unit to be controlled, and judging whether the current operating power exceeds a preset first operating power threshold value;
if the current operating power does not exceed a preset first operating power threshold value, acquiring a main steam pressure value and a water supply pressure value, and controlling a valve position of a water supply regulating valve based on the main steam pressure value and the water supply pressure value;
and if the current operating power exceeds a preset first operating power threshold value, acquiring the current operating power and the operating state of the water feeding pump, controlling the rotating speed of the water feeding pump based on the current operating power and the operating state of the water feeding pump, and simultaneously controlling the opening of a water feeding adjusting valve based on the current control power.
2. The method of claim 1, wherein the controlling a feedwater regulating valve position based on the main steam pressure value and the feedwater pressure value comprises:
acquiring a change value of the main steam pressure value, processing the change value through an integral module, and inputting a result processed by the integral module into a proportional coefficient self-adaptive adjusting module;
acquiring a pressure difference value between a main steam pressure value and a feedwater pressure value, and inputting the pressure difference value to an integral adaptive adjustment module;
and carrying out valve position control on the water supply regulating valve based on the proportional coefficient self-adaptive regulating module and the integral self-adaptive regulating module.
3. The method of claim 2, wherein the controlling a speed of the feedwater pump based on the current operating power and the feedwater pump operating condition comprises:
taking integral time in internal parameter variables of a water feeding pump rotating speed PI controller as an input variable;
inputting the current operating power and the operating state of the water feeding pump into a self-adaptive integral time operation module for processing to obtain a calculation result of the self-adaptive integral time operation module;
inputting the calculation result of the self-adaptive integral time operation module to an integral time input end of a water pump rotating speed PI controller to obtain an output value of the water pump rotating speed PI controller;
and controlling the rotating speed of the water feeding pump based on the output value of the water pump rotating speed PI controller.
4. The method of claim 1, wherein said simultaneously controlling the opening of a feedwater regulating valve based on said current control power comprises:
inputting the current operating power to an adaptive adjusting module for processing to obtain the output of the adaptive adjusting module;
and controlling the opening of the water supply regulating valve based on the output of the self-adaptive regulating module.
5. The method of claim 4, wherein the controlling the opening of a feedwater regulating valve based on the output of the adaptive regulation module comprises:
acquiring a liquid level value of a steam generator, and judging whether the liquid level value of the steam generator belongs to a preset first high liquid level, a preset second high liquid level or a preset low liquid level;
and if the liquid level value of the steam generator belongs to a preset first high liquid level, a preset second high liquid level or a preset low liquid level, controlling a full-load water supply regulating valve and a low-load water supply regulating valve through a preset selector according to the output of the self-adaptive regulating module and the liquid level value of the steam generator and the output of the selector.
6. The method of claim 5, wherein the controlling the opening of a feedwater regulating valve based on the output of the adaptive regulation module further comprises:
and if the liquid level value of the steam generator does not belong to a preset first high liquid level, a preset second high liquid level or a preset low liquid level, controlling the full-load water supply regulating valve and the low-load water supply regulating valve based on normal regulating valve position setting logic.
7. The method of claim 2, wherein the controlling the valve position of the feedwater regulating valve based on the scaling factor adaptation module and the integral adaptation module comprises:
inputting the output value of the proportional coefficient self-adaptive adjusting module to a proportional adjusting coefficient input port of a PID adjusting module, inputting the output value of the integral self-adaptive adjusting module to an integral time coefficient input port of the PID adjusting module, and inputting the deviation value between the conversion function of the main steam pressure value and the feedwater pressure value to a deviation input port of the PID adjusting module;
and acquiring the output of the PID regulating module, and performing valve position control on the water supply regulating valve according to the output of the PID regulating module.
8. A nuclear power plant steam generator level control apparatus, the apparatus comprising:
the judging module is used for acquiring the current operating power of the unit to be controlled and judging whether the current operating power exceeds a preset first operating power threshold value;
the first control module is used for acquiring a main steam pressure value and a water supply pressure value when the current operating power does not exceed a preset first operating power threshold value, and carrying out valve position control on a water supply regulating valve based on the main steam pressure value and the water supply pressure value;
and the second control module is used for acquiring the current operating power and the operating state of the water feeding pump when the current operating power exceeds a preset first operating power threshold, controlling the rotating speed of the water feeding pump based on the current operating power and the operating state of the water feeding pump, and controlling the opening of the water feeding adjusting valve based on the current control power.
9. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor, when executing the computer program, implements the steps of the method of any of claims 1 to 7.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 7.
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Publication number Priority date Publication date Assignee Title
CN114688520A (en) * 2022-03-04 2022-07-01 中广核工程有限公司 Liquid level auxiliary control method and system for steam generator of nuclear power station
CN114688520B (en) * 2022-03-04 2024-03-19 中广核工程有限公司 Auxiliary control method and system for liquid level of steam generator of nuclear power station

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