CN104165352B - A kind of nuclear power plant evaporator Water-Level Supervising System and method for supervising thereof - Google Patents
A kind of nuclear power plant evaporator Water-Level Supervising System and method for supervising thereof Download PDFInfo
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- CN104165352B CN104165352B CN201410392842.6A CN201410392842A CN104165352B CN 104165352 B CN104165352 B CN 104165352B CN 201410392842 A CN201410392842 A CN 201410392842A CN 104165352 B CN104165352 B CN 104165352B
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Abstract
The invention discloses a kind of nuclear power plant evaporator Water-Level Supervising System and method for supervising thereof.This system comprises for deviation signal generating mechanism, the first master controller be connected with deviation signal generating mechanism and the second master controller, be connected with the first master controller and the first submaster controller be connected with large valve, the mismatch signal generating mechanism be connected with the first submaster controller with the first master controller respectively, the negative bias signal generating mechanism be connected with the first submaster controller and first-hand movement controller, be connected with the second master controller and the second submaster controller be connected with little valve, the feed-forward signal generating mechanism be connected with the second submaster controller with the second master controller respectively and second-hand's movement controller.This nuclear power plant evaporator Water-Level Supervising System and method for supervising can realize optimizing Non-follow control to realize no-harass switch under the prerequisite not affecting control automatically, make in any case, Non-follow control between large valve and little valve is independent of each other with automatically controlling, and evaporimeter water lev el control is simpler and steady.
Description
Technical field
The present invention relates to nuclear power plant equipment field, particularly relate 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, the control of evaporimeter water level for the equipment protection of nuclear power station and delivered heat extremely important.Evaporimeter water level is the key parameter that directly can cause jumping heap, and water level is too high will flood drier, and outlet steam moisture is increased, aggravation turbine blade erosion phenomenon, and the life-span affecting unit even makes unit damage; The too low primary Ioops coolant temperature that will cause of water level raises, and cause Core cooling not enough, and steam generator heat-transfer pipe damages.
Because the parameter affecting evaporimeter water lev el control is complicated, control logic is complicated, make because evaporimeter water-level fluctuation causes nuclear power station to occur to jump heap event, security risk is brought to the equipment of nuclear power station, bring adverse effect also to the economic benefit of nuclear power station, therefore evaporimeter water lev el control is one of the most complicated control system of nuclear power station simultaneously.Current nuclear power plant evaporator carries out water lev el control mainly through ARE system, to maintain the water level of evaporimeter secondary side on the setting valve of demand.
ARE system controls the water level of evaporimeter by size valve.Adopt size valve to control, when its objective is that realization is little at load, feedwater flow is low, adopt little valve to control to make it have better flexibility, reduce the action of large valve flap, to protect large valve; , feedwater flow large at load is high, adopt large valve to control, little valve keeps standard-sized sheet, to make water lev el control more rapidly steadily.Particularly, ARE system comprise a master controller, be connected with master controller for the first submaster controller of controlling large valve opening and first-hand movement controller, be connected with master controller for controlling the second submaster controller of little valve opening and second-hand's movement controller and relevant information collecting device.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, receive the manual ringing of second-hand's movement controller when adopting load to be less than 20% in prior art, load is more than or equal to the manual ringing of the first-hand movement controller of 20% reception.
Such design can realize when load is less than 20%, and the large valve of ACTIVE CONTROL cuts out, and realizes little valve and automatically controls the no-harass switch with Non-follow control, ensures the stable of evaporimeter water lev el control.But have the following disadvantages: when load is greater than 20%, large valve can realize automatically controlling the no-harass switch with Non-follow control, and little valve can not realize automatically controlling the no-harass switch with Non-follow control, easily cause water-level fluctuation and affect the normal operation of nuclear power station.Particularly, when load is greater than 20%, there is following situation in the water lev el control of large valve and little valve: (1), when load is greater than 20%, realizes the automatic control to large valve and little valve opening by master controller and the first submaster controller, the second submaster controller.But when the biased difference of evaporator water is large, automatically controls to realize the object of the water level of evaporimeter secondary side at the setting valve of demand very well, therefore need to introduce Non-follow control.(2) when load is greater than 20%, when large valve controls automatically, if control little valve opening by second-hand's movement controller, because master controller receives only the manual ringing from first-hand movement controller, and the manual ringing do not received from second-hand's movement controller, now the output signal of the second submaster controller and second-hand's movement controller exists inconsistent, easily cause switch to from Non-follow control automatically control time, due to the sudden change of signal, the no-harass switch of little valve can not be realized.(3) when load is greater than 20%, coordinate with the large valve opening of Non-follow control by master controller with first-hand movement controller, and realize automatically controlling little valve opening by master controller and the second submaster controller, when the large valve of Non-follow control, water-level fluctuation is larger, produce carbonated drink mismatch signal, the balance affecting water level controls, and causes the overshoot of little valve water lev el control out of control.(4) when load is greater than 20%, first-hand movement controller and second-hand's movement controller send the manual ringing controlling large valve and little valve opening respectively, now master controller receives only the manual ringing of first-hand movement controller, and the manual ringing of not direct second-hand's movement controller, and the manual ringing of the signal that the second submaster controller reception master controller transmits and second-hand's movement controller is inconsistent, easily cause switch to from Non-follow control automatically control time, due to the sudden change of signal, the no-harass switch of little valve can not be realized.
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 to arrange the aperture of large valve on an evaporator and little valve, comprise the deviation signal generating mechanism for generation of water level deviation signal, the first master controller for described water level deviation signal being processed into first flow control signal be connected with described deviation signal generating mechanism, be connected with described first master controller and the first submaster controller for automatically controlling described large valve opening be connected with described large valve, the mismatch signal generating mechanism for generation of carbonated drink mismatch signal be connected with described first submaster controller with described first master controller respectively, the negative bias signal generating mechanism for generation of negative bias signal be connected with described first submaster controller, and for the first-hand movement controller of valve opening large described in Non-follow control, described first submaster controller processes the described first flow control signal, carbonated drink mismatch signal and the negative bias signal that receive to form the first opening control signal automatically controlling described large valve opening, produce for making carbonated drink mismatch signal input to the first master controller to form the first status signal that first manually follows signal during the large valve of described first-hand movement controller Non-follow control,
Also comprise the second master controller for described water level deviation signal being processed into the second flow control signal be connected with described deviation signal generating mechanism, be connected with described second master controller and the second submaster controller for automatically controlling described little valve opening be connected with little valve, the feed-forward signal generating mechanism for generation of little valve feed-forward signal be connected with described second submaster controller with described second master controller respectively, and for second-hand's movement controller of valve opening little described in Non-follow control, described second submaster controller root processes described second flow control signal received and little valve feed-forward signal to form the second opening control signal automatically controlling described little valve opening, produce for making little valve feed-forward signal input to the second master controller to form the second status signal that second manually follows signal during the little valve of described second-hand's movement controller Non-follow control, and described second status signal is inputed to described second master controller.
Preferably, described deviation signal generating mechanism comprises some water level transmitters, the setting valve generating mechanism for generating the water level setting valve of evaporimeter water level, the first processor for described water level measured value and described water level setting valve being processed into water level deviate that is connected with described setting valve generating mechanism with described water level transmitter respectively of the water level measured value for detecting evaporimeter water level.
Preferably, described setting valve generating mechanism the second processor for described secondary circuit load signal being processed into water level setting valve of comprising the load signal generating mechanism for generating secondary circuit load signal and being connected with described load signal generating mechanism.
Preferably, described load signal generating mechanism comprise the first vapour pressure force value for gathering wide-range the first pressure gauge, for gather the reject steam flow in steam by-pass exhaust system first-class gauge, for the second gauge that gathers the deoxygenation steam flow in feedwater deaerating system and the 3rd processor for described first vapour pressure force value, reject steam flow and deoxygenation steam flow being processed into secondary circuit load signal be connected with described first pressure gauge, first-class gauge and second gauge respectively.
Preferably, described feed-forward signal generating mechanism comprise the second vapour pressure force value for gathering narrow range the second pressure gauge, for gather the reject steam flow in steam by-pass exhaust system first-class gauge, for the second gauge that gathers the deoxygenation steam flow in feedwater deaerating system and the four-processor for described second vapour pressure force value, reject steam flow and deoxygenation steam flow being processed into little valve feed-forward signal be connected with described second pressure gauge, first-class gauge and second gauge respectively.
Preferably, described negative bias signal generating mechanism comprises the load comparator for described secondary circuit load signal being processed into negative bias signal be connected with described load signal generating mechanism, and described load comparator is connected with described first submaster controller.
Preferably, described mismatch signal generating mechanism comprise the import feedwater flow for gathering described evaporimeter the 3rd flowmeter, for the 4th flowmeter that gathers the outlet vapor flow of described evaporimeter and the 5th processor for described import feedwater flow and outlet vapor flow being processed into carbonated drink mismatch signal be connected with the 4th flowmeter with described 3rd flowmeter respectively.
The present invention also provides a kind of method for supervising of nuclear power plant evaporator Water-Level Supervising System, and comprise the method controlling large valve opening and the method controlling little valve opening, 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 from deviation signal generating mechanism;
S12: judge whether the first master controller receives first and manually follow signal, if then do not process described water level deviation signal, and manually follows signal by described first and inputs to the first submaster controller; Then described water level deviation signal be processed into first flow control signal if not and be sent to the first submaster controller;
S13: judge whether the first submaster controller receives the negative bias signal produced from negative bias signal, closes if then automatically control large valve; Then the carbonated drink mismatch signal from mismatch signal generating mechanism received and the second flow control signal are processed if not, form the first opening control signal automatically to control the aperture of described large valve;
Wherein, form the first status signal during the large valve opening of first-hand movement controller Non-follow control, manually follow signal so that 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 from deviation signal generating mechanism;
S22: judge whether the second master controller receives second and manually follow signal, if then do not process described water level deviation signal, and manually follows signal by described second and inputs to the second submaster controller; Then described water level deviation signal be processed into the second flow control signal if not and be sent to the second submaster controller;
S23: the second sub-control receives and processes from the little valve feed-forward signal of feed-forward signal generating mechanism and the second flow control signal, forms the second opening control signal automatically to control the aperture of little valve;
Wherein, form the second status signal during the little valve opening of second-hand's movement controller Non-follow control, manually follow signal so that described little valve feed-forward signal is inputed to the second master controller to form second, described second status signal inputs to the second master controller.
Preferably, described water level deviation signal is the difference of water level setting valve that the water level measured value that gathers of water level transmitter and setting valve generating mechanism generate; Described carbonated drink mismatch signal is the difference of the import feedwater flow of described 3rd flowmeter collection and the outlet vapor flow of described 4th flowmeter collection; Described negative feed-forward signal is the secondary circuit load signal of described load signal generating mechanism generation and the difference of preset negative charge values, and described preset negative charge values is 20%.
The present invention compared with prior art tool has the following advantages: implement the present invention, the first master controller and the second master controller is adopted to control large valve and little valve respectively, when making the large valve of first-hand movement controller Non-follow control and the little valve of second-hand's movement controller Non-follow control, first manually follows signal and second manually follows signal and inputs to the first master controller and the second master controller respectively, Non-follow control is optimized to realize no-harass switch under the prerequisite not affecting control automatically, make in any case, Non-follow control between large valve and little valve and automatically control are independent of each other, make evaporimeter water lev el control simple and steady.
Accompanying drawing explanation
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 generating mechanism; 331, the 3rd flowmeter; 332, the 4th flowmeter; 333, the 5th processor; 340, negative bias signal generating mechanism; 341, load comparator; 400, the second master controller; 410, the second submaster controller; 420, second-hand's movement controller; 430, feed-forward signal generating mechanism; 431, the second pressure gauge; 432, four-processor; 500, deviation signal generating mechanism; 510, water level transmitter; 520, setting valve generating mechanism; 521, load signal generating mechanism; 5211, the first pressure gauge; 5212, first-class gauge; 5213, second gauge; 5214, the 3rd processor; 522, the second processor; 530, first processor.
Detailed description of the invention
In order to there be understanding clearly to technical characteristic of the present invention, object and effect, 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 for controlling to arrange the aperture of large valve 100 on an evaporator and little valve 200, to realize the monitoring to evaporimeter water level.This nuclear power plant evaporator Water-Level Supervising System comprises the deviation signal generating mechanism 500 for generation of water level deviation signal, the first master controller 300 for water level deviation signal being processed into first flow control signal be connected with deviation signal generating mechanism 500, be connected with the first master controller 300 and the first submaster controller 310 for automatically controlling large valve 100 aperture be connected with large valve 100, the mismatch signal generating mechanism 330 for generation of carbonated drink mismatch signal be connected with the first submaster controller 310 with the first master controller 300 respectively, the negative bias signal generating mechanism 340 for generation of negative bias signal be connected with the first submaster controller 310, and for the first-hand movement controller 320 of Non-follow control large valve 100 aperture, first submaster controller 310 processes the first flow control signal received, carbonated drink mismatch signal and negative bias signal to form aperture first opening control signal automatically controlling large valve 100, produce for making carbonated drink mismatch signal input to the first master controller 300 to form the first status signal that first manually follows signal during the large valve 100 of first-hand movement controller 320 Non-follow control.
During work, if during the aperture of the large valve 100 of first-hand movement controller 320 Non-follow control, produce the first status signal; Carbonated drink mismatch signal is inputed to the first master controller 300 and manually follows signal to form first by the first state signal triggers mismatch signal generating mechanism 330, and manually follow signal by first and input to the first submaster controller 310, to make Non-follow control consistent with the output signal of the first submaster controller 310 when automatically controlling, to avoid, when large valve 100 switches between Non-follow control and automatic control, occurring signal disturbance.First master controller 300 receive first manually follow signal after, stop the coherent signal to large valve 100 automatically controls to process.If during the aperture of first-hand movement controller 320 less than the large valve 100 of Non-follow control, namely the first master controller 300 does not receive first when manually following signal, and the first master controller 300 obtains first flow control signal after carrying out PID arithmetic to the water level deviation signal from deviation signal generating mechanism 500 received and exports the first submaster controller 310 to.First submaster controller 310 is to the carbonated drink mismatch signal from mismatch signal generating mechanism 330 received, from the negative bias signal of negative bias signal generating mechanism 340 with process from the first flow control signal of the first master controller 300, to form the first opening control signal for automatically controlling large valve 100 aperture.
This nuclear power plant evaporator Water-Level Supervising System also comprises the second master controller 400 for water level deviation signal being processed into the second flow control signal be connected with deviation signal generating mechanism 500, be connected with the second master controller 400 and the second submaster controller 410 for automatically controlling little valve 200 aperture be connected with little valve 200, the feed-forward signal generating mechanism 430 for generation of little valve feed-forward signal be connected with the second submaster controller 410 with the second master controller 400 respectively, and for second-hand's movement controller 420 of Non-follow control little valve 200 aperture, second submaster controller 410 processes the second flow control signal received and little valve feed-forward signal to form the second opening control signal automatically controlling little valve 200 aperture, produce for making little valve feed-forward signal input to the second master controller 400 to form the second status signal that second manually follows signal during the little valve 200 of second-hand's movement controller 420 Non-follow control, and the second status signal is inputed to the second master controller 400.
During work, if during the aperture of the little valve 200 of second-hand's movement controller 420 Non-follow control, produce the second status signal second status signal and input to the second master controller 400; Little valve feed-forward signal is inputed to the second master controller 400 and manually follows signal to form second by the second state signal triggers feed-forward signal generating mechanism 430, and manually follow signal by second and input to the second submaster controller 410, to make Non-follow control consistent with the output signal of the second submaster controller 410 when automatically controlling, with avoid little valve 200 from Non-follow control and switch between automatically controlling time, there is disturbance.Second master controller 400 receive second manually follow signal after, stop the coherent signal to little valve 200 automatically controls to process.If when second-hand's movement controller 420 does not have an aperture of Non-follow control little valve 200, namely the second master controller 400 does not receive second when manually following signal, and the second master controller 400 obtains the second flow control signal after carrying out PID arithmetic to the water level deviation signal from deviation signal generating mechanism 500 received and exports the second submaster controller 410 to.Second submaster controller 410 is to the little valve feed-forward signal from feed-forward signal generating mechanism 430 received and process from the second flow control signal of the second master controller 400, to form the second opening control signal for automatically controlling little valve 200 aperture.
In the present embodiment, first master controller 300 and the second master controller 400 are all PID control systems, owing to there is the effect of the links such as P ratio, I integration, D differential in PID control system, use the impact being subject to various parameter in automatic control process, and water lev el control is by the impact of multiple environmental factor, easily occur that signal disturbance carries out making evaporimeter water level occur fluctuation, use is depended merely on control adjustment evaporimeter water level automatically and water level may be caused to transfinite, and therefore needs to introduce Non-follow control in nuclear power plant evaporator Water-Level Supervising System.At nuclear power plant evaporator Water-Level Supervising System from automatically controlling to switch to Non-follow control, or from Non-follow control switch to automatically control time, its output signal inconsistently easily causes signal disturbance, the object of the present invention is to provide a kind of evaporator water position monitoring system and method for supervising thereof, for realizing Non-follow control and the no-harass switch automatically controlled.
In the present invention, the first master controller 300 and the second master controller 400 is adopted to control large valve 100 and little valve 200 respectively, when making the large valve of first-hand movement controller 320 Non-follow control 100 and the little valve 200 of second-hand's movement controller 420 Non-follow control, first manually follows signal and second manually follows signal and inputs to the first master controller 300 and the second master controller 400 respectively, Non-follow control is optimized to realize no-harass switch under the prerequisite not affecting control automatically, make in any case, Non-follow control between large valve 100 and little valve 200 and automatically control are independent of each other, make evaporimeter water lev el control simple and steady.
Particularly, deviation signal generating mechanism 500 comprises some water level transmitters 510, the setting valve generating mechanism 520 for generating the water level setting valve of evaporimeter water level, the first processor 530 for water level measured value and water level setting valve being processed into water level deviate that is connected with setting valve generating mechanism 520 with water level transmitter 510 respectively of the water level measured value for detecting evaporimeter water level.Understandably, first processor 530 carries out computing to the some water level measured values received, 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 is subtracted each other, and both differences are water level deviation signal.
Particularly, setting valve generating mechanism 520 the second processor 522 for secondary circuit load signal being processed into water level setting valve of comprising the load signal generating mechanism 521 for generating secondary circuit load signal and being connected with load signal generating mechanism 521.Understandably, secondary circuit load signal is the standard value for monitoring evaporimeter water level obtained through the second processor 522 computing.
More specifically, load signal generating mechanism 521 comprise the first vapour pressure force value for gathering wide-range the first pressure gauge 5211, for gather the reject steam flow in steam by-pass exhaust system first-class gauge 5212, for the second gauge 5213 that gathers the deoxygenation steam flow in feedwater deaerating system and the 3rd processor 5214 for the first vapour pressure force value, reject steam flow and deoxygenation steam flow being processed into secondary circuit load signal be connected with the first pressure gauge 5211, first-class gauge 5212 and second gauge 5213 respectively.
Feed-forward signal generating mechanism 430 comprises the second pressure gauge 431 of the second vapour pressure force value for gathering narrow range, for gathering the first-class gauge 5212 of the reject steam flow in steam by-pass exhaust system, for gathering the second gauge 5213 of the deoxygenation steam flow in feedwater deaerating system, and respectively with the second pressure gauge 431, first-class gauge 5212 be connected with second gauge 5213 for by the second vapour pressure force value, reject steam flow, the four-processor 432 of little valve feed-forward signal is processed into deoxygenation steam flow.
Negative bias signal generating mechanism 340 comprises the load comparator 341 for institute's loop load signal being processed into negative bias signal be connected with load signal generating mechanism 521, and load comparator 341 is connected with the first submaster controller 310.Understandably, load comparator 341 compares computing for the secondary circuit load signal that generates load signal generating mechanism 521 and preset negative charge values, and both differences export as negative bias signal.Particularly, preset negative charge values is 20%, if the secondary circuit load signal that load signal generating mechanism 521 exports is less than preset negative charge values (20%), then load comparator 341 exports the negative bias signal of 8.5% to the first submaster controller 310, when first submaster controller 310 pairs negative bias signal, first flow control signal and carbonated drink mismatch signal process, 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 opening control signal controlling large valve 100 contract fully.If when the secondary circuit load signal that load signal generating mechanism 521 exports is less than preset negative charge values (20%), load comparator 341 does not export negative bias signal to the first submaster controller 310, now the first submaster controller 310 pairs of first flow control signals and carbonated drink mismatch signal process, with the first opening control signal of formation control large valve 100 aperture.
Mismatch signal generating mechanism 330 comprise the import feedwater flow for gathering evaporimeter the 3rd flowmeter 331, for the 4th flowmeter 332 that gathers the outlet vapor flow of evaporimeter and the 5th processor 333 for import feedwater flow and outlet vapor flow being processed into carbonated drink mismatch signal be connected with the 4th flowmeter 332 with the 3rd flowmeter 331 respectively.Understandably, the import feedwater flow that the 3rd flowmeter 331 gathers by the 5th processor 333 and the outlet vapor flow that the 4th flowmeter 332 gathers subtract each other, and both differences export as carbonated drink mismatch signal.
More specifically, at large valve 100 automatic control process, the first submaster controller 310 processes the first flow control signal received, 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 for ensureing that secondary circuit load signal is less than preset negative charge values (20%), control large valve 100 contract fully, do not participate in evaporimeter water lev el control, when opening to avoid large valve 100, cause evaporator feedwater excessive, thus cause evaporimeter water level too high and jump heap.At little valve 200 automatic control process, the second submaster controller 410 processes the second flow control signal received, little valve feed-forward signal, to control the aperture of little valve 200.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, comprise the method controlling large valve 100 aperture and the method controlling little valve 200 aperture, the method controlling large valve 100 aperture comprises the following steps:
S11: the first master controller 300 receives the water level deviation signal from deviation signal generating mechanism 500.Particularly, water level deviation signal is that the water level setting valve generated by water level measured value and the setting valve generating mechanism 520 of first processor 530 pairs of water level transmitters 510 collections carries out subtraction, and both differences are water level deviation signal.Water level setting valve is secondary circuit load signal is the standard value for monitoring evaporimeter water level obtained through the second processor 522 computing.Secondary circuit load signal is that the first vapour pressure force value that the deoxygenation steam flow that gathers of reject steam flow, the second gauge 5213 gathered by first-class gauge 5212 by the 3rd processor 5214 and the first pressure gauge 5211 are gathered carries out computing gained.
S12: judge whether the first master controller 300 receives first and manually follow signal, if then do not process water level deviation signal, and manually follows signal and inputs to the first submaster controller 310 by first; Then water level deviation signal be processed into first flow control signal if not and be sent to the first submaster controller 310.Wherein, form the first status signal during large valve 100 aperture of first-hand movement controller 320 Non-follow control, manually follow signal carbonated drink mismatch signal to be inputed to the first master controller 300 to form first.Understandably, during the aperture of the large valve 100 of first-hand movement controller 320 Non-follow control, carbonated drink mismatch signal is inputed to the first master controller 300 and manually follows signal to form first by the first state signal triggers mismatch signal generating mechanism 330 produced, and manually follow signal by first and input to the first submaster controller 310, to make Non-follow control consistent with the output signal of the first submaster controller 310 when automatically controlling, to avoid, when large valve 100 switches between Non-follow control and automatic control, occurring disturbance.First master controller 300 receive first manually follow signal after, stop the coherent signal to large valve 100 automatically controls to process.If during the aperture of first-hand movement controller 320 less than the large valve 100 of Non-follow control, namely the first master controller 300 does not receive first when manually following signal, and the first master controller 300 obtains first flow control signal after carrying out PID arithmetic to the water level deviation signal from deviation signal generating mechanism 500 received and exports the first submaster controller 310 to.
S13: judge whether the first submaster controller 310 receives the negative bias signal produced from negative bias signal, closes if then automatically control large valve 100; Then the carbonated drink mismatch signal from mismatch signal generating mechanism 330 received and the second flow control signal are processed if not, form the first opening control signal automatically to control the aperture of large valve 100.Wherein, negative feed-forward signal is the secondary circuit load signal of load signal generating mechanism 521 generation and the difference of preset negative charge values, and preset negative charge values is 20%.When negative bias signal is for ensureing that secondary circuit load signal is less than preset negative charge values (20%), control large valve 100 complete shut-down, do not participate in evaporimeter water lev el control, when opening to avoid large valve 100, cause evaporator feedwater excessive, thus cause evaporimeter water level too high and jump heap.At large valve 100 automatic control process, the first flow control signal received 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 controlling little valve 200 aperture comprises the following steps:
S21: the second master controller 400 receives the water level deviation signal from deviation signal generating mechanism 500.Understandably, step S21 is consistent with step S11.
S22: judge whether the second master controller 400 receives second and manually follow signal, if then do not process water level deviation signal, and manually follows signal and inputs to the second submaster controller 410 by second; Then water level deviation signal be processed into the second flow control signal if not and be sent to the second submaster controller 410.Wherein, the second status signal is formed during little valve 200 aperture of second-hand's movement controller 420 Non-follow control, manually signal is followed to form second carbonated drink mismatch signal to be inputed to the second master controller 400, understandably, the second status signal that second-hand's movement controller 420 produces inputs to the second master controller 400.Understandably, during the aperture of the little valve 200 of second-hand's movement controller 420 Non-follow control, carbonated drink mismatch signal is inputed to the second master controller 400 and manually follows signal to form second by the second state signal triggers mismatch signal generating mechanism 330 produced, and manually follow signal by second and input to the second submaster controller 410, to make Non-follow control consistent with the output signal of the second submaster controller 410 when automatically controlling, to avoid, when little valve 200 switches between Non-follow control and automatic control, occurring disturbance.Second master controller 400 receive second manually follow signal after, stop the coherent signal to little valve 200 automatically controls to process.If when second-hand's movement controller 420 does not have an aperture of Non-follow control little valve 200, namely the second master controller 400 does not receive second when manually following signal, and the second master controller 400 obtains the second flow control signal after carrying out PID arithmetic to the water level deviation signal from deviation signal generating mechanism 500 received and exports the second submaster controller 410 to.
S23: the second sub-control receives and processes from the little valve feed-forward signal of feed-forward signal generating mechanism 430 and the second flow control signal, forms the second opening control signal automatically to control the aperture of little valve 200.Particularly, little valve feed-forward signal obtains after the second vapour pressure force value, the reject steam flow of first-class gauge 5212 collection and the deoxygenation steam flow of second gauge 5213 collection collected the second pressure gauge 431 by four-processor 432 is processed.At little valve 200 automatic control process, the second submaster controller 410 processes the second flow control signal received, little valve feed-forward signal, to control the aperture of little valve 200.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, Non-follow control can be optimized to realize no-harass switch under the prerequisite not affecting control automatically, make in any case, Non-follow control between large valve and little valve is independent of each other with automatically controlling, and makes evaporimeter water lev el control simple and steady.
The present invention is described 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 substituting to the present invention.In addition, for particular condition or concrete condition, various amendment can be made 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 fallen within the scope of the claims in the present invention.
Claims (9)
1. a nuclear power plant evaporator Water-Level Supervising System, for controlling to arrange the aperture of large valve (100) on an evaporator and little valve (200), it is characterized in that: comprise the deviation signal generating mechanism (500) for generation of water level deviation signal, the first master controller (300) for described water level deviation signal being processed into first flow control signal be connected with described deviation signal generating mechanism (500), be connected with described first master controller (300) and the first submaster controller (310) for automatically controlling described large valve (100) aperture be connected with described large valve (100), the mismatch signal generating mechanism (330) for generation of carbonated drink mismatch signal be connected with described first submaster controller (310) with described first master controller (300) respectively, the negative bias signal generating mechanism (340) for generation of negative bias signal be connected with described first submaster controller (310), and for the first-hand movement controller (320) of valve (100) aperture large described in Non-follow control, described first submaster controller (310) processes the described first flow control signal, carbonated drink mismatch signal and the negative bias signal that receive to form the first opening control signal automatically controlling described large valve (100) aperture, produce time described first-hand movement controller (320) Non-follow control large valve (100) and be used for making carbonated drink mismatch signal input to the first master controller (300) to form the first status signal that first manually follows signal,
Also comprise the second master controller (400) for described water level deviation signal being processed into the second flow control signal be connected with described deviation signal generating mechanism (500), be connected with described second master controller (400) and the second submaster controller (410) for automatically controlling described little valve (200) aperture be connected with little valve (200), the feed-forward signal generating mechanism (430) for generation of little valve feed-forward signal be connected with described second submaster controller (410) with described second master controller (400) respectively, and for second-hand's movement controller (420) of valve (200) aperture little described in Non-follow control, described second submaster controller (410) root processes described second flow control signal received and little valve feed-forward signal to form the second opening control signal automatically controlling described little valve (200) aperture, produce time described second-hand's movement controller (420) Non-follow control little valve (200) and be used for making little valve feed-forward signal input to the second master controller (400) to form the second status signal that second manually follows signal, and described second status signal is inputed to described second master controller (400).
2. nuclear power plant evaporator Water-Level Supervising System according to claim 1, is characterized in that: described deviation signal generating mechanism (500) comprises some water level transmitters (510), the setting valve generating mechanism (520) for generating the water level setting valve of evaporimeter water level, the first processor (530) for described water level measured value and described water level setting valve being processed into water level deviate that is connected with described setting valve generating mechanism (520) with described water level transmitter (510) respectively of the water level measured value for detecting evaporimeter water level.
3. nuclear power plant evaporator Water-Level Supervising System according to claim 2, is characterized in that: the second processor (522) for described secondary circuit load signal being processed into water level setting valve that described setting valve generating mechanism (520) comprises the load signal generating mechanism (521) for generating secondary circuit load signal and is connected with described load signal generating mechanism (521).
4. nuclear power plant evaporator Water-Level Supervising System according to claim 3, it is characterized in that: described load signal generating mechanism (521) comprises first pressure gauge (5211) of the first vapour pressure force value for gathering wide-range, for gathering the first-class gauge (5212) of the reject steam flow in steam by-pass exhaust system, for gathering the second gauge (5213) of the deoxygenation steam flow in feedwater deaerating system, and respectively with described first pressure gauge (5211), first-class gauge (5212) be connected with second gauge (5213) for by described first vapour pressure force value, reject steam flow, the 3rd processor (5214) of secondary circuit load signal is processed into 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 generating mechanism (430) comprises second pressure gauge (431) of the second vapour pressure force value for gathering narrow range, for gathering the first-class gauge (5212) of the reject steam flow in steam by-pass exhaust system, for gathering the second gauge (5213) of the deoxygenation steam flow in feedwater deaerating system, and respectively with described second pressure gauge (431), first-class gauge (5212) be connected with second gauge (5213) for by described second vapour pressure force value, reject steam flow, the four-processor (432) of little valve feed-forward signal is processed into 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 generating mechanism (340) comprises the load comparator (341) for described secondary circuit load signal being processed into negative bias signal be connected with described load signal generating mechanism (521), and described load comparator (341) is connected with described first submaster controller (310).
7. nuclear power plant evaporator Water-Level Supervising System according to claim 1, is characterized in that: described mismatch signal generating mechanism (330) comprise the import feedwater flow for gathering described evaporimeter the 3rd flowmeter (331), for the 4th flowmeter (332) that gathers the outlet vapor flow of described evaporimeter and the 5th processor (333) for described import feedwater flow and outlet vapor flow being processed into carbonated drink mismatch signal be connected with the 4th flowmeter (332) with described 3rd flowmeter (331) respectively; Described carbonated drink mismatch signal is the difference of the outlet vapor flow that the import feedwater flow that gathers of described 3rd flowmeter (331) and described 4th flowmeter (332) gather.
8. the method for supervising of the nuclear power plant evaporator Water-Level Supervising System described in an any one of claim 1 ~ 7, it is characterized in that: comprise the method controlling large valve (100) aperture and the method 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 from deviation signal generating mechanism (500);
S12: judge whether the first master controller (300) receives first and manually follow signal, if then do not process described water level deviation signal, and manually follows signal and inputs to the first submaster controller (310) by described first; Then described water level deviation signal be processed into first flow control signal if not and be sent to the first submaster controller (310);
S13: judge whether the first submaster controller (310) receives the negative bias signal produced from negative bias signal, closes if then automatically control large valve (100); Then the carbonated drink mismatch signal from mismatch signal generating mechanism (330) received and the second flow control signal are processed if not, form the first opening control signal automatically to control the aperture of described large valve (100);
Wherein, during first-hand movement controller (320) Non-follow control large valve (100) aperture, form the first status signal, manually follow signal so that 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 from deviation signal generating mechanism (500);
S22: judge whether the second master controller (400) receives second and manually follow signal, if then do not process described water level deviation signal, and manually follows signal and inputs to the second submaster controller (410) by described second; Then described water level deviation signal be processed into the second flow control signal if not and be sent to the second submaster controller (410);
S23: the second sub-control receives and processes from the little valve feed-forward signal of feed-forward signal generating mechanism (430) and the second flow control signal, forms the second opening control signal automatically to control the aperture of little valve (200);
Wherein, the second status signal is formed during second-hand's movement controller (420) Non-follow control 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 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 difference of the water level setting valve that the water level measured value that gathers of water level transmitter (510) and setting valve generating mechanism (520) generate.
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| CN113721674B (en) * | 2021-07-23 | 2024-05-17 | 中广核核电运营有限公司 | Nuclear power plant evaporator water level control system and method |
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