CN104165352A - System and method for monitoring water level of nuclear power plant evaporator - Google Patents
System and method for monitoring water level of nuclear power plant evaporator Download PDFInfo
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- CN104165352A CN104165352A CN201410392842.6A CN201410392842A CN104165352A CN 104165352 A CN104165352 A CN 104165352A CN 201410392842 A CN201410392842 A CN 201410392842A CN 104165352 A CN104165352 A CN 104165352A
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Abstract
The invention discloses a system and method for monitoring the water level of a nuclear power plant evaporator. The system comprises a deviation signal generation mechanism, a first master controller, a second master controller, a first slave controller, a mismatching signal generation mechanism, a negative deviation signal generation mechanism, a first manual controller, a second slave controller, a feedforward signal generation mechanism and a second manual controller. The first master controller and the second master controller are connected with the deviation signal generation mechanism. The first slave controller is connected with the first master controller and a large valve. The mismatching signal generation mechanism is connected with the first master controller and the first slave controller. The negative deviation signal generation mechanism and the first manual controller are connected with the first slave controller. The second slave controller is connected with the second master controller and a pet valve. The feedforward signal generation mechanism and the second manual controller are connected with the second master controller and the second slave controller respectively. According to the system and method for monitoring the water level of the nuclear power plant evaporator, manual control can be optimized to achieve undisturbed switching on the premise that automatic control is not influenced, so that manual control and automatic control over the large valve and the pet valve do not influence each other under any condition, and control over the water level of the evaporator is easier and more stable.
Description
Technical field
The present invention relates to nuclear power plant equipment field, relate in particular to a kind of nuclear power plant evaporator Water-Level Supervising System and method for supervising thereof.
Background technology
Evaporimeter is the important equipment of nuclear power station, and the control of evaporimeter water level is extremely important for equipment protection and the heat transmission of nuclear power station.Evaporimeter water level is the key parameter that can directly cause jumping heap, and water level is too high will flood drier, and making to export steam moisture increases, aggravation turbine blade erosion phenomenon, and the life-span that affects unit even makes unit damage; Water level is too low will cause that a circuit cools agent temperature raises, and cause Core cooling deficiency, and steam generator heat-transfer pipe damage.
Owing to affecting the parameter complexity of evaporimeter water level control, control logic complexity, make, because the fluctuation of evaporimeter water level causes nuclear power station, heap event occurs to jump, bring security risk to the equipment of nuclear power station, bring adverse effect also to the economic benefit of nuclear power station, therefore the control of evaporimeter water level is one of the most complicated control system of nuclear power station simultaneously.Current nuclear power plant evaporator mainly carries out water level control by ARE system, with the water level that maintains evaporimeter secondary side on the setting valve of demand.
ARE system is by the water level of big or small valve control evaporimeter.Adopt big or small valve control, its objective is and realize in the situation that little, the feedwater flow of load is low, adopt little valve control to make it have better flexibility, reduce the action of large valve flap, to protect large valve; The in the situation that, feedwater flow large at load being high, adopt large valve control, little valve keeps standard-sized sheet, so that water level control more rapidly steadily.Particularly, ARE system comprise a master controller, be connected with master controller for control that the first submaster controller of large valve opening is connected with first-hand movement controller, with master controller for controlling the second submaster controller and second-hand's movement controller and the relevant information collecting device of little valve opening.The control of large valve and little valve shares a master controller and controls, and master controller can not receive the manual ringing of first-hand movement controller and the transmission of second-hand's movement controller simultaneously, available technology adopting load receives the manual ringing of second-hand's movement controller while being less than 20%, load is more than or equal to the manual ringing of the first-hand movement controller of 20% reception.
Such design can realize in the time that load is less than 20%, and the large valve of ACTIVE CONTROL cuts out, and realizes the automatic unperturbed switching of controlling and manually control of little valve, ensures the stable of evaporimeter water level control.But have the following disadvantages: in the time that load is greater than 20%, large valve can be realized automatic control and switch with the unperturbed of manually controlling, and little valve can not be realized automatic control and switches with the unperturbed of manually controlling, easily cause water-level fluctuation and affect the normal operation of nuclear power station.Particularly, in the time that load is greater than 20%, there is following situation in the water level control of large valve and little valve: (1), in the time that load is greater than 20%, can realize the automatic control to large valve and little valve opening by master controller and the first submaster controller, the second submaster controller.But in the time that the biased difference of evaporator water is large, automatically control cannot fine realization by the water level of evaporimeter secondary side the object at the setting valve of demand, therefore need to introduce manual control.(2) in the time that load is greater than 20%, in the situation that large valve is controlled automatically, if by the little valve opening of second-hand's movement controller control, because master controller receives only the manual ringing from first-hand movement controller, and do not receive the manual ringing from second-hand's movement controller, now the output signal of the second submaster controller and second-hand's movement controller exists inconsistently, easily causes in the time switching to automatic control from manual control, due to the sudden change of signal, the unperturbed that can not realize little valve switches.(3) in the time that load is greater than 20%, can coordinate manually to control by master controller large valve opening with first-hand movement controller, and realize the little valve opening of automatic control by master controller and the second submaster controller, in the time manually controlling large valve, water-level fluctuation is larger, produce carbonated drink mismatch signal, affect the balance control of water level, cause little valve water level control overshoot out of control.(4) in the time that load is greater than 20%, first-hand movement controller and second-hand's movement controller send respectively the manual ringing of controlling large valve and little valve opening, now master controller receives only the manual ringing of first-hand movement controller, and the direct manual ringing of second-hand's movement controller not, and the second submaster controller receives the signal of master controller transmission and the manual ringing of second-hand's movement controller is inconsistent, easily cause in the time switching to automatic control from manual control, due to the sudden change of signal, the unperturbed that can not realize little valve switches.
Summary of the invention
The technical problem to be solved in the present invention is, for the defect of prior art, provides a kind of nuclear power plant evaporator Water-Level Supervising System and method for supervising thereof.
The present invention is achieved by the following technical programs: a kind of nuclear power plant evaporator Water-Level Supervising System, for controlling the large valve that is arranged on evaporimeter and the aperture of little valve, comprise for generation of the deviation signal of water level deviation signal and generate mechanism, generate with described deviation signal that mechanism is connected for described water level deviation signal being processed into the first master controller of first flow control signal, the first submaster controller for the described large valve opening of automatic control that is connected with described the first master controller and is connected with described large valve, the mismatch signal for generation of carbonated drink mismatch signal being connected with described the first submaster controller with described the first master controller respectively generates mechanism, the negative bias signal for generation of negative bias signal being connected with described the first submaster controller generates mechanism, and for manually controlling the first-hand movement controller of described large valve opening, described the first submaster controller processes to form the first aperture control signal of the described large valve opening of automatic control to the described first flow control signal, carbonated drink mismatch signal and the negative bias signal that receive, described first-hand movement controller produces while manually controlling large valve for making carbonated drink mismatch signal input to the first master controller to form the first first status signal of manually following signal,
Also comprise generate with described deviation signal that mechanism is connected for described water level deviation signal being processed into the second master controller of the second flow control signal, the second submaster controller for the described little valve opening of automatic control that is connected with described the second master controller and is connected with little valve, the feed-forward signal for generation of little valve feed-forward signal being connected with described the second submaster controller with described the second master controller respectively generates mechanism, and for manually controlling second-hand's movement controller of described little valve opening, described the second submaster controller root processes to form the second aperture control signal of the described little valve opening of automatic control to described the second flow control signal of receiving and little valve feed-forward signal, described second-hand's movement controller produces while manually controlling little valve for making little valve feed-forward signal input to the second master controller to form the second second status signal of manually following signal, and described the second status signal is inputed to described the second master controller.
Preferably, described deviation signal generate mechanism comprise some water level transmitters of the water level measured value for surveying evaporimeter water level, for generate the setting valve of water level setting valve of evaporimeter water level generate mechanism, respectively generate with described water level transmitter and described setting valve that mechanism is connected for described water level measured value and described water level setting valve being processed into the first processor of water level deviate.
Preferably, described setting valve generate mechanism comprise load signal for generating secondary circuit load signal generate mechanism with generate with described load signal that mechanism is connected for described secondary circuit load signal being processed into the second processor of water level setting valve.
Preferably, described load signal generate mechanism comprise the first pressure gauge of the first steam pressure value for gathering wide-range, for gather steam by-pass exhaust system reject steam flow first flow meter, for gather feedwater deaerating system deoxygenation steam flow the second flowmeter and be connected with described the first pressure gauge, first flow meter and the second flowmeter respectively for described the first steam pressure value, reject steam flow and deoxygenation steam flow being processed into the 3rd processor of secondary circuit load signal.
Preferably, described feed-forward signal generate mechanism comprise the second pressure gauge of the second steam pressure value for gathering narrow range, for gather steam by-pass exhaust system reject steam flow first flow meter, for gather feedwater deaerating system deoxygenation steam flow the second flowmeter and be connected with described the second pressure gauge, first flow meter and the second flowmeter respectively for described the second steam pressure value, reject steam flow and deoxygenation steam flow being processed into the four-processor of little valve feed-forward signal.
Preferably, described negative bias signal generate mechanism comprise generate with described load signal that mechanism is connected for described secondary circuit load signal being processed into the load comparator of negative bias signal, described load comparator is connected with described the first submaster controller.
Preferably, described mismatch signal generate mechanism comprise the 3rd flowmeter of the import feedwater flow for gathering described evaporimeter, for gather described evaporimeter outlet steam flow the 4th flowmeter and be connected with the 4th flowmeter with described the 3rd flowmeter respectively for by described import feedwater flow with export steam flow and be processed into the 5th processor of carbonated drink mismatch signal.
The present invention also provides a kind of method for supervising of nuclear power plant evaporator Water-Level Supervising System, comprises the method for controlling large valve opening and the method for controlling little valve opening, and the method for the large valve opening of described control comprises the following steps:
S11: the first master controller receives the water level deviation signal that generates mechanism from deviation signal;
S12: judge whether the first master controller receives first and manually follow signal, if described water level deviation signal is not processed, and manually follow signal by described first and input to the first submaster controller; Described water level deviation signal is processed into first flow control signal and sends to the first submaster controller if not;
S13: judge whether the first submaster controller receives the negative bias signal producing from negative bias signal, close if automatically control large valve; Carbonated drink mismatch signal and the second flow control signal from the mismatch signal generation mechanism that receive are processed if not, formed the first aperture control signal automatically to control the aperture of described large valve;
Wherein, first-hand movement controller forms the first status signal while manually controlling large valve opening, manually follows signal described carbonated drink mismatch signal is inputed to the first master controller to form first;
The method of the little valve opening of described control comprises the following steps:
S21: the second master controller receives the water level deviation signal that generates mechanism from deviation signal;
S22: judge whether the second master controller receives second and manually follow signal, if described water level deviation signal is not processed, and manually follow signal by described second and input to the second submaster controller; Described water level deviation signal is processed into the second flow control signal and is sent to the second submaster controller if not;
S23: the second sub-control receives from little valve feed-forward signal and second flow control signal of feed-forward signal generation mechanism and processes, and forms the second aperture control signal automatically to control the aperture of little valve;
Wherein, second-hand's movement controller forms the second status signal while manually controlling little valve opening, manually follows signal so that described little valve feed-forward signal is inputed to the second master controller to form second, and described the second status signal inputs to the second master controller.
Preferably, described water level deviation signal is the poor of the water level measured value of water level transmitter collection and the water level setting valve of setting valve generation mechanism generation; Described carbonated drink mismatch signal is the poor of the import feedwater flow of described the 3rd flowmeter collection and the outlet steam flow of described the 4th flowmeter collection; Described negative feed-forward signal is that described load signal generates the poor of secondary circuit load signal that mechanism generates and default load value, and described default load value is 20%.
The present invention compared with prior art tool has the following advantages: implement the present invention, adopt the first master controller and the second master controller to control respectively large valve and little valve, first-hand movement controller is manually controlled when large valve and second-hand's movement controller are manual controls little valve, first manually follows signal and second manually follows signal and inputs to respectively the first master controller and the second master controller, under the prerequisite that does not affect automatic control, optimize manually to control to realize unperturbed and switch, make in any case, manual control between large valve and little valve and automatically control are independent of each other, make the control of evaporimeter water level simple and steady.
Brief description of the drawings
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is a theory diagram of nuclear power station evaporator water position monitoring system in one embodiment of the invention.
Fig. 2 is another theory diagram of nuclear power station evaporator water position monitoring system in one embodiment of the invention.
In figure: 100, large valve; 200, little valve; 300, the first master controller; 310, the first submaster controller; 320, first-hand movement controller; 330, mismatch signal generates mechanism; 331, the 3rd flowmeter; 332, the 4th flowmeter; 333, the 5th processor; 340, negative bias signal generates mechanism; 341, load comparator; 400, the second master controller; 410, the second submaster controller; 420, second-hand's movement controller; 430, feed-forward signal generates mechanism; 431, the second pressure gauge; 432, four-processor; 500, deviation signal generates mechanism; 510, water level transmitter; 520, setting valve generates mechanism; 521, load signal generates mechanism; 5211, the first pressure gauge; 5212, first flow meter; 5213, the second flowmeter; 5214, the 3rd processor; 522, the second processor; 530, first processor.
Detailed description of the invention
Understand for technical characterictic of the present invention, object and effect being had more clearly, now contrast accompanying drawing and describe the specific embodiment of the present invention in detail.
Fig. 1 illustrates the nuclear power plant evaporator Water-Level Supervising System in one embodiment of the invention.This nuclear power plant evaporator Water-Level Supervising System is for controlling the large valve 100 that is arranged on evaporimeter and the aperture of little valve 200, to realize the monitoring to evaporimeter water level.This nuclear power plant evaporator Water-Level Supervising System comprises the deviation signal generation mechanism 500 for generation of water level deviation signal, with deviation signal generate mechanism 500 be connected for water level deviation signal being processed into the first master controller 300 of first flow control signal, the first submaster controller 310 for large valve 100 apertures of automatic control that is connected with the first master controller 300 and is connected with large valve 100, the mismatch signal for generation of carbonated drink mismatch signal being connected with the first submaster controller 310 with the first master controller 300 respectively generates mechanism 330, the negative bias signal for generation of negative bias signal being connected with the first submaster controller 310 generates mechanism 340, and for manually controlling the first-hand movement controller 320 of large valve 100 apertures, the first submaster controller 310 processes to form the aperture first aperture control signal of the large valve 100 of automatic control to the first flow control signal receiving, carbonated drink mismatch signal and negative bias signal, first-hand movement controller 320 produces while manually controlling large valve 100 for making carbonated drink mismatch signal input to the first master controller 300 to form the first first status signal of manually following signal.
When work, if when first-hand movement controller 320 is manually controlled the aperture of large valve 100, produce the first status signal; The first state signal triggers mismatch signal generation mechanism 330 inputs to the first master controller 300 by carbonated drink mismatch signal and manually follows signal to form first, and manually follow signal by first and input to the first submaster controller 310, control with automatic control during so that manual, the output signal of the first submaster controller 310 is consistent, to avoid, in the time that large valve 100 switches between manually controlling and automatically controlling, occurring signal disturbance.The first master controller 300 receives first and manually follows after signal, and the coherent signal that stops large valve 100 automatically to control is processed.If when first-hand movement controller 320 does not have manually to control the aperture of large valve 100, the first master controller 300 does not receive first while manually following signal, and the first master controller 300 carries out obtaining first flow control signal after PID computing to the water level deviation signal that generates mechanism 500 from deviation signal receiving and exports the first submaster controller 310 to.The first submaster controller 310 generates the carbonated drink mismatch signal of mechanism 330, generates the negative bias signal of mechanism 340 and process from the first flow control signal of the first master controller 300, to be formed for automatically controlling the first aperture control signal of large valve 100 apertures from negative bias signal from mismatch signal what receive.
This nuclear power plant evaporator Water-Level Supervising System also comprise with deviation signal generate mechanism 500 be connected for water level deviation signal being processed into the second master controller 400 of the second flow control signal, the second submaster controller 410 for little valve 200 apertures of automatic control that is connected with the second master controller 400 and is connected with little valve 200, the feed-forward signal for generation of little valve feed-forward signal being connected with the second submaster controller 410 with the second master controller 400 respectively generates mechanism 430, and for manually controlling second-hand's movement controller 420 of little valve 200 apertures, the second submaster controller 410 processes to form the second aperture control signal of little valve 200 apertures of automatic control to the second flow control signal receiving and little valve feed-forward signal, second-hand's movement controller 420 produces while manually controlling little valve 200 for making little valve feed-forward signal input to the second master controller 400 to form the second second status signal of manually following signal, and the second status signal is inputed to the second master controller 400.
When work, if when second-hand's movement controller 420 is manually controlled the aperture of little valve 200, produce second status signal the second status signal and input to the second master controller 400; The second state signal triggers feed-forward signal generation mechanism 430 inputs to the second master controller 400 by little valve feed-forward signal and manually follows signal to form second, and manually follow signal by second and input to the second submaster controller 410, control with automatic control during so that manual, the output signal of the second submaster controller 410 is consistent, when avoiding switching from manual control with between automatically controlling at little valve 200, there is disturbance.The second master controller 400 receives second and manually follows after signal, and the coherent signal that stops little valve 200 automatically to control is processed.If when second-hand's movement controller 420 does not have manually to control the aperture of little valve 200, the second master controller 400 does not receive second while manually following signal, and the second master controller 400 carries out obtaining the second flow control signal after PID computing to the water level deviation signal that generates mechanism 500 from deviation signal receiving and exports the second submaster controller 410 to.The second submaster controller 410 generates the little valve feed-forward signal of mechanism 430 and processes from the second flow control signal of the second master controller 400 from feed-forward signal what receive, to be formed for automatically controlling the second aperture control signal of little valve 200 apertures.
In the present embodiment, the first master controller 300 and the second master controller 400 are all PID control systems, owing to there being the effect of the links such as P ratio, I integration, D differential in PID control system, use the impact that is subject to various parameters in automatic control process, and water level control is subject to the impact of multiple environmental factor, easily occur that signal disturbance makes evaporimeter water level emersion wave moving, automatic control adjustment evaporimeter water level is depended merely in use may cause that water level transfinites, and therefore in nuclear power plant evaporator Water-Level Supervising System, needs to introduce manual control.Switch to manual control at nuclear power plant evaporator Water-Level Supervising System from automatic control, or while switching to automatic control from manual control, the inconsistent signal disturbance that easily causes of its output signal, the object of the present invention is to provide a kind of evaporator water position monitoring system and method for supervising thereof, switch with the unperturbed of automatically controlling for realizing manual control.
In the present invention, adopt the first master controller 300 and the second master controller 400 to control respectively large valve 100 and little valve 200, while making first-hand movement controller 320 manually control large valve 100 and the little valve 200 of second-hand's movement controller 420 manual control, first manually follows signal and second manually follows signal and inputs to respectively the first master controller 300 and the second master controller 400, under the prerequisite that does not affect automatic control, optimize manually to control to realize unperturbed and switch, make in any case, manual control between large valve 100 and little valve 200 and automatically control are independent of each other, make the control of evaporimeter water level simple and steady.
Particularly, deviation signal generate mechanism 500 comprise some water level transmitters 510 of the water level measured value for surveying evaporimeter water level, for generate the setting valve of water level setting valve of evaporimeter water level generate mechanism 520, respectively generate with water level transmitter 510 and setting valve that mechanism 520 is connected for water level measured value and water level setting valve being processed into the first processor 530 of water level deviate.Understandably, first processor 530 carries out computing to the some water level measured values that receive, and asks the mean value of some water level measured values, then the mean value of some water level measured values and water level setting valve are subtracted each other, and both differences are water level deviation signal.
Particularly, setting valve generate mechanism 520 comprise load signal for generating secondary circuit load signal generate mechanism 521 with generate with load signal that mechanism 521 is connected for secondary circuit load signal being processed into the second processor 522 of water level setting valve.Understandably, secondary circuit load signal be obtain through the second processor 522 computings for monitoring the standard value of evaporimeter water level.
More specifically, load signal generate mechanism 521 comprise the first pressure gauge 5211 of the first steam pressure value for gathering wide-range, for gather steam by-pass exhaust system reject steam flow first flow meter 5212, for gather feedwater deaerating system deoxygenation steam flow the second flowmeter 5213 and be connected with the first pressure gauge 5211, first flow meter 5212 and the second flowmeter 5213 respectively for the first steam pressure value, reject steam flow and deoxygenation steam flow being processed into the 3rd processor 5214 of secondary circuit load signal.
Feed-forward signal generates the second pressure gauge 431 that mechanism 430 comprises the second steam pressure value for gathering narrow range, be used for the first flow meter 5212 of the reject steam flow that gathers steam by-pass exhaust system, be used for the second flowmeter 5213 of the deoxygenation steam flow that gathers feedwater deaerating system, and respectively with the second pressure gauge 431, first flow meter 5212 be connected with the second flowmeter 5213 for by the second steam pressure value, reject steam flow, be processed into the four-processor 432 of little valve feed-forward signal with deoxygenation steam flow.
Negative bias signal generate mechanism 340 comprise with load signal generate mechanism 521 be connected for institute's loop load signal being processed into the load comparator 341 of negative bias signal, load comparator 341 be connected with the first submaster controller 310.Understandably, load comparator 341 compares computing for secondary circuit load signal and default load value that load signal generation mechanism 521 is generated, and both differences are exported as negative bias signal.Particularly, default load value is 20%, if the secondary circuit load signal that load signal generation mechanism 521 exports is less than default load value (20%), the comparator 341 of loading is exported the negative bias signal of 8.5% to the first submaster controller 310, when the first submaster controller 310 is processed negative bias signal, first flow control signal and carbonated drink mismatch signal, negative bias signal due to 8.5% is much larger than first flow control signal and carbonated drink mismatch signal, therefore the first submaster controller 310 produces the first aperture control signal of controlling large valve 100 contract fullys.If when the secondary circuit load signal that load signal generation mechanism 521 exports is less than default load value (20%), load comparator 341 is not exported negative bias signal to the first submaster controller 310, now the first submaster controller 310 is processed first flow control signal and carbonated drink mismatch signal, with the first aperture control signal of large valve 100 apertures of formation control.
Mismatch signal generate mechanism 330 comprise the 3rd flowmeter 331 of the import feedwater flow for gathering evaporimeter, for gather evaporimeter outlet steam flow the 4th flowmeter 332 and be connected with the 4th flowmeter 332 with the 3rd flowmeter 331 respectively for by import feedwater flow with export steam flow and be processed into the 5th processor 333 of carbonated drink mismatch signal.Understandably, the outlet steam flow that the import feedwater flow that the 5th processor 333 gathers the 3rd flowmeter 331 and the 4th flowmeter 332 gather subtracts each other, and both differences are exported as carbonated drink mismatch signal.
More specifically, at large valve 100 automatic control processes, the first submaster controller 310 is processed the first flow control signal receiving, carbonated drink mismatch signal and negative feed-forward signal, to control the aperture of large valve 100.First flow control signal is larger, and the aperture of large valve 100 is larger; Carbonated drink mismatch signal is larger, and the aperture of large valve 100 is larger; When negative bias signal is used for ensureing that secondary circuit load signal is less than default load value (20%), control large valve 100 contract fullys, do not participate in the control of evaporimeter water level, when avoiding large valve 100 to open, cause evaporator feedwater excessive, thus cause evaporimeter water level too high and jump heap.At little valve 200 automatic control processes, the second submaster controller 410 is processed the second flow control signal receiving, little valve feed-forward signal, to control the aperture of little valve 200.The second flow control signal is larger, and the aperture of little valve 200 is larger; Little valve feed-forward signal is larger, and the aperture of little valve 200 is larger.
A method for supervising for aforesaid nuclear power plant evaporator Water-Level Supervising System, comprises the method for controlling large valve 100 apertures and the method for controlling little valve 200 apertures, and the method for controlling large valve 100 apertures comprises the following steps:
S11: the first master controller 300 receives the water level deviation signal that generates mechanism 500 from deviation signal.Particularly, water level deviation signal is that the water level measured value that water level transmitter 510 gathered by first processor 530 and setting valve generate the water level setting valve that mechanism 520 generates and carry out subtraction, and both differences are water level deviation signal.Water level setting valve be secondary circuit load signal be obtain through the second processor 522 computings for monitoring the standard value of evaporimeter water level.The first steam pressure value that the deoxygenation steam flow that secondary circuit load signal is the reject steam flow that first flow meter 5212 gathered by the 3rd processor 5214, the second flowmeter 5213 gathers and the first pressure gauge 5211 gather is carried out computing gained.
S12: judge whether the first master controller 300 receives first and manually follow signal, if water level deviation signal is not processed, and manually follow signal by first and input to the first submaster controller 310; Water level deviation signal be processed into if not to first flow control signal and send to the first submaster controller 310.Wherein, first-hand movement controller 320 forms the first status signal while manually controlling large valve 100 aperture, manually follows signal carbonated drink mismatch signal is inputed to the first master controller 300 to form first.Understandably, when first-hand movement controller 320 is manually controlled the aperture of large valve 100, the the first state signal triggers mismatch signal generation mechanism 330 producing inputs to the first master controller 300 by carbonated drink mismatch signal and manually follows signal to form first, and manually follow signal by first and input to the first submaster controller 310, control with automatic control during so that manual, the output signal of the first submaster controller 310 is consistent, to avoid, in the time that large valve 100 switches between manually controlling and automatically controlling, occurring disturbance.The first master controller 300 receives first and manually follows after signal, and the coherent signal that stops large valve 100 automatically to control is processed.If when first-hand movement controller 320 does not have manually to control the aperture of large valve 100, the first master controller 300 does not receive first while manually following signal, and the first master controller 300 carries out obtaining first flow control signal after PID computing to the water level deviation signal that generates mechanism 500 from deviation signal receiving and exports the first submaster controller 310 to.
S13: judge whether the first submaster controller 310 receives the negative bias signal producing from negative bias signal, close if automatically control large valve 100; Carbonated drink mismatch signal and the second flow control signal from the mismatch signal generation mechanism 330 that receive are processed if not, formed the first aperture control signal automatically to control the aperture of large valve 100.Wherein, negative feed-forward signal is that load signal generates the poor of the secondary circuit load signal that generates of mechanism 521 and default load value, and default load value is 20%.When negative bias signal is used for ensureing that secondary circuit load signal is less than default load value (20%), control large valve 100 complete shut-downs, do not participate in the control of evaporimeter water level, when avoiding large valve 100 to open, cause evaporator feedwater excessive, thus cause evaporimeter water level too high and jump heap.At large valve 100 automatic control processes, the first flow control signal receiving is larger, and the aperture of large valve 100 is larger; Carbonated drink mismatch signal is larger, and the aperture of large valve 100 is larger.
The method of controlling little valve 200 apertures comprises the following steps:
S21: the second master controller 400 receives the water level deviation signal that generates mechanism 500 from deviation signal.Understandably, step S21 is consistent with step S11.
S22: judge whether the second master controller 400 receives second and manually follow signal, if water level deviation signal is not processed, and manually follow signal by second and input to the second submaster controller 410; Water level deviation signal be processed into if not to the second flow control signal and be sent to the second submaster controller 410.Wherein, second-hand's movement controller 420 forms the second status signal while manually controlling little valve 200 aperture, manually follow signal carbonated drink mismatch signal is inputed to the second master controller 400 to form second, understandably, the second status signal that second-hand's movement controller 420 produces inputs to the second master controller 400.Understandably, when second-hand's movement controller 420 is manually controlled the aperture of little valve 200, the the second state signal triggers mismatch signal generation mechanism 330 producing inputs to the second master controller 400 by carbonated drink mismatch signal and manually follows signal to form second, and manually follow signal by second and input to the second submaster controller 410, control with automatic control during so that manual, the output signal of the second submaster controller 410 is consistent, to avoid, in the time that little valve 200 switches between manually controlling and automatically controlling, occurring disturbance.The second master controller 400 receives second and manually follows after signal, and the coherent signal that stops little valve 200 automatically to control is processed.If when second-hand's movement controller 420 does not have manually to control the aperture of little valve 200, the second master controller 400 does not receive second while manually following signal, and the second master controller 400 carries out obtaining the second flow control signal after PID computing to the water level deviation signal that generates mechanism 500 from deviation signal receiving and exports the second submaster controller 410 to.
S23: the second sub-control receives from little valve feed-forward signal and second flow control signal of feed-forward signal generation mechanism 430 and processes, and forms the second aperture control signal automatically to control the aperture of little valve 200.Particularly, the deoxygenation steam flow that the reject steam flow that little valve feed-forward signal is the second steam pressure value of the second pressure gauge 431 being collected by four-processor 432, first flow meter 5212 gathers and the second flowmeter 5213 gather obtains after processing.At little valve 200 automatic control processes, the second submaster controller 410 is processed the second flow control signal receiving, little valve feed-forward signal, to control the aperture of little valve 200.The second flow control signal is larger, and the aperture of little valve 200 is larger; Little valve feed-forward signal is larger, and the aperture of little valve 200 is larger.
The method for supervising of nuclear power plant evaporator Water-Level Supervising System provided by the present invention, can under the prerequisite that does not affect automatic control, optimize manually to control to realize unperturbed and switch, make in any case, manual control between large valve and little valve is independent of each other with automatic control, makes the control of evaporimeter water level simple and steady.
The present invention describes by a specific embodiment, it will be appreciated by those skilled in the art that, without departing from the present invention, can also carry out various conversion and be equal to alternative the present invention.In addition, for particular condition or concrete condition, can make various amendments to the present invention, and not depart from the scope of the present invention.Therefore, the present invention is not limited to disclosed specific embodiment, and should comprise the whole embodiments that fall within the scope of the claims in the present invention.
Claims (9)
1. a nuclear power plant evaporator Water-Level Supervising System, for controlling the large valve (100) that is arranged on evaporimeter and the aperture of little valve (200), it is characterized in that: comprise for generation of the deviation signal of water level deviation signal and generate mechanism (500), generate with described deviation signal that mechanism (500) is connected for described water level deviation signal being processed into first master controller (300) of first flow control signal, the first submaster controller (310) for automatic control described large valve (100) aperture that is connected with described the first master controller (300) and is connected with described large valve (100), the mismatch signal for generation of carbonated drink mismatch signal being connected with described the first submaster controller (310) with described the first master controller (300) respectively generates mechanism (330), the negative bias signal for generation of negative bias signal being connected with described the first submaster controller (310) generates mechanism (340), and for manually controlling the first-hand movement controller (320) of described large valve (100) aperture, described the first submaster controller (310) processes to form the first aperture control signal of the described large valve of automatic control (100) aperture to the described first flow control signal, carbonated drink mismatch signal and the negative bias signal that receive, when described first-hand movement controller (320) is manually controlled large valve (100), produce and be used for making carbonated drink mismatch signal to input to the first master controller (300) to form the first first status signal of manually following signal,
Also comprise generate with described deviation signal that mechanism (500) is connected for described water level deviation signal being processed into second master controller (400) of the second flow control signal, the second submaster controller (410) for automatic control described little valve (200) aperture that is connected with described the second master controller (400) and is connected with little valve (200), the feed-forward signal for generation of little valve feed-forward signal being connected with described the second submaster controller (410) with described the second master controller (400) respectively generates mechanism (430), and for manually controlling second-hand's movement controller (420) of described little valve (200) aperture, described the second submaster controller (410) root processes to form the second aperture control signal of the described little valve of automatic control (200) aperture to described the second flow control signal of receiving and little valve feed-forward signal, when described second-hand's movement controller (420) is manually controlled little valve (200), produce and be used for making little valve feed-forward signal to input to the second master controller (400) to form the second second status signal of manually following signal, and described the second status signal is inputed to described the second master controller (400).
2. nuclear power plant evaporator Water-Level Supervising System according to claim 1, is characterized in that: described deviation signal generate mechanism (500) comprise some water level transmitters (510) of the water level measured value for surveying evaporimeter water level, for generate the setting valve of water level setting valve of evaporimeter water level generate mechanism (520), be respectively connected with described water level transmitter (510) and described setting valve generation mechanism (520) for described water level measured value and described water level setting valve being processed into the first processor (530) of water level deviate.
3. nuclear power plant evaporator Water-Level Supervising System according to claim 2, is characterized in that: described setting valve generate mechanism (520) comprise load signal for generating secondary circuit load signal generate mechanism (521) with generate with described load signal that mechanism (521) is connected for described secondary circuit load signal being processed into second processor (522) of water level setting valve.
4. nuclear power plant evaporator Water-Level Supervising System according to claim 3, it is characterized in that: described load signal generates the first pressure gauge (5211) that mechanism (521) comprises the first steam pressure value for gathering wide-range, be used for the first flow meter (5212) of the reject steam flow that gathers steam by-pass exhaust system, be used for second flowmeter (5213) of the deoxygenation steam flow that gathers feedwater deaerating system, and respectively with described the first pressure gauge (5211), first flow meter (5212) be connected with the second flowmeter (5213) for by described the first steam pressure value, reject steam flow, be processed into the 3rd processor (5214) of secondary circuit load signal with deoxygenation steam flow.
5. nuclear power plant evaporator Water-Level Supervising System according to claim 4, it is characterized in that: described feed-forward signal generates the second pressure gauge (431) that mechanism (430) comprises the second steam pressure value for gathering narrow range, be used for the first flow meter (5212) of the reject steam flow that gathers steam by-pass exhaust system, be used for second flowmeter (5213) of the deoxygenation steam flow that gathers feedwater deaerating system, and respectively with described the second pressure gauge (431), first flow meter (5212) be connected with the second flowmeter (5213) for by described the second steam pressure value, reject steam flow, be processed into the four-processor (432) of little valve feed-forward signal with deoxygenation steam flow.
6. nuclear power plant evaporator Water-Level Supervising System according to claim 4, it is characterized in that: described negative bias signal generate mechanism (340) comprise generate with described load signal that mechanism (521) is connected for described secondary circuit load signal being processed into the load comparator (341) of negative bias signal, described load comparator (341) is connected with described the first submaster controller (310).
7. nuclear power plant evaporator Water-Level Supervising System according to claim 1, is characterized in that: described mismatch signal generate mechanism (330) comprise the 3rd flowmeter (331) of the import feedwater flow for gathering described evaporimeter, for gather described evaporimeter outlet steam flow the 4th flowmeter (332) and be connected with the 4th flowmeter (332) with described the 3rd flowmeter (331) respectively for by described import feedwater flow and the 5th processor (333) that exports steam flow and be processed into carbonated drink mismatch signal.
8. the method for supervising of the nuclear power plant evaporator Water-Level Supervising System described in claim 1～7 any one, it is characterized in that: comprise the method for controlling large valve (100) aperture and the method for controlling little valve (200) aperture, the method for the large valve of described control (100) aperture comprises the following steps:
S11: the first master controller (300) receives the water level deviation signal that generates mechanism (500) from deviation signal;
S12: judge whether the first master controller (300) receives first and manually follow signal, if described water level deviation signal is not processed, and manually follow signal by described first and input to the first submaster controller (310); Described water level deviation signal is processed into first flow control signal and sends to the first submaster controller (310) if not;
S13: judge whether the first submaster controller (310) receives the negative bias signal producing from negative bias signal, close if automatically control large valve (100); Carbonated drink mismatch signal and the second flow control signal from the mismatch signal generation mechanism (330) that receive are processed if not, formed the first aperture control signal automatically to control the aperture of described large valve (100);
Wherein, first-hand movement controller (320) forms the first status signal while manually controlling large valve (100) aperture, manually follows signal described carbonated drink mismatch signal is inputed to the first master controller (300) to form first;
The method of the little valve of described control (200) aperture comprises the following steps:
S21: the second master controller (400) receives the water level deviation signal that generates mechanism (500) from deviation signal;
S22: judge whether the second master controller (400) receives second and manually follow signal, if described water level deviation signal is not processed, and manually follow signal by described second and input to the second submaster controller (410); Described water level deviation signal is processed into the second flow control signal and is sent to the second submaster controller (410) if not;
S23: the second sub-control receives from little valve feed-forward signal and second flow control signal of feed-forward signal generation mechanism (430) and processes, forms the second aperture control signal automatically to control the aperture of little valve (200);
Wherein, second-hand's movement controller (420) forms the second status signal while manually controlling little valve (200) aperture, manually follow signal so that described little valve feed-forward signal is inputed to the second master controller (400) to form second, described the second status signal inputs to the second master controller (400).
9. the method for supervising of nuclear power plant evaporator Water-Level Supervising System according to claim 8, is characterized in that: described water level deviation signal is the poor of the water level measured value of water level transmitter (510) collection and the water level setting valve of setting valve generation mechanism (520) generation; Described carbonated drink mismatch signal is the poor of the import feedwater flow of described the 3rd flowmeter (331) collection and the outlet steam flow of described the 4th flowmeter (332) collection; Described negative feed-forward signal is that described load signal generates the poor of secondary circuit load signal that mechanism (521) generates and default load value, and described default load value is 20%.
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