CN106504809A - A kind of method and device that prevents the unexpected shutdown of nuclear-power reactor - Google Patents
A kind of method and device that prevents the unexpected shutdown of nuclear-power reactor Download PDFInfo
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- CN106504809A CN106504809A CN201610911626.7A CN201610911626A CN106504809A CN 106504809 A CN106504809 A CN 106504809A CN 201610911626 A CN201610911626 A CN 201610911626A CN 106504809 A CN106504809 A CN 106504809A
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21D—NUCLEAR POWER PLANT
- G21D3/00—Control of nuclear power plant
- G21D3/04—Safety arrangements
- G21D3/06—Safety arrangements responsive to faults within the plant
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
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- High Energy & Nuclear Physics (AREA)
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- Protection Of Generators And Motors (AREA)
Abstract
The embodiment of the invention discloses a kind of method and device that prevents the unexpected shutdown of nuclear-power reactor, generator is connected successively with on-load switch, transformer, high-voltage switch gear and power system in nuclear power plant system, and wherein method comprises: first the embodiment of the present invention by judging whether generator overfrequency event occurs; If so, judge again that whether on-load switch is closed; If so, finally disconnect high-voltage switch gear; Due in the time that overfrequency event occurs, consider the state of on-load switch, prevent the false tripping of high-voltage switch gear, therefore make that maintenance work is carried out smoothly, unit rise state is fast and has ensured the security of unit.
Description
Technical field
The present invention relates to nuclear power field, relate in particular to a kind of method and device that prevents the unexpected shutdown of nuclear-power reactor.
Background technology
In nuclear power plant system, conventionally generator, on-load switch, transformer, high-voltage switch gear and power system are connected successively. for preventing that the unit that generator overfrequency causes from damaging, conventionally need to detect in real time the frequency of generator outlet voltage, in the time of frequency overfrequency threshold value, obtain the duration of overfrequency threshold value, if the duration is greater than duration threshold value, disconnect high-voltage switch gear.
In the time safeguarding generator, staff disconnects on-load switch, and now, if occur, the steam turbine in Turbo-generator Set is super Speed, the frequency of generator outlet voltage meeting overfrequency threshold value, thus disconnecting high-voltage switch gear, high-voltage switch gear is inverse nuclear reaction heap The predominating path of power supply is provided, and high-voltage switch gear disconnects, and will cause the unexpected shutdown of reactor, causes operation and the work of full plant State generation great change, forces normal work in every to be all affected, and cannot normally carry out, need to be at reactor and attached After genus equipment state is stable, could carry out other conventional maintenance work; Or in the time that on-load switch breaks down disconnection, generator Get rid of whole loads, because Turbo-generator Set itself exists machinery inertial, simultaneously because the resistance of generator load is done suddenly With disappearance, cause Turbo-generator Set velocity of rotation to start to increase, there is steam turbine hypervelocity, the frequency meeting of generator outlet voltage Overfrequency threshold value, thus high-voltage switch gear disconnected, cause equally the unexpected shutdown of reactor, cause operation and the work of full plant State generation great change. reactor, from shutdown status transition to normal operating condition, needs operation and the state of large amount of complex Conversion, therefore high-voltage switch gear tripping operation makes unit rise state slow. meanwhile, high-voltage switch gear tripping operation, reactor lose main outside Power supply, reactor shutdown, will cause system and equipment to be severely affected, and likely cause device damage, thereby affect machine The security .. of group
Because above-mentioned prior art only disconnects high-voltage switch gear according to the overfrequency event of generator, thus caused that maintenance work is easily interrupted, unit rise state slowly and cannot ensure the security of unit.
Summary of the invention
The embodiment of the present invention provides a kind of method that prevents the unexpected shutdown of nuclear-power reactor, can make that maintenance work is carried out smoothly, unit rise state fast and ensure the security of unit.
First aspect, the embodiment of the present invention provides a kind of method that prevents the unexpected shutdown of nuclear-power reactor, comprising:
Judge whether generator overfrequency event occurs;
If so, judge that whether on-load switch is closed;
If so, disconnect high-voltage switch gear.
On the other hand, a kind of device for preventing nuclear-power reactor accident shutdown is embodiments provided, including：
Overfrequency event judging unit, for judging whether generator overfrequency event occurs;
On-load switch judging unit, if judge generator generation overfrequency event for overfrequency event judge module, judgement Whether on-load switch closes;
Switching units, if judge on-load switch closure for on-load switch judging unit, disconnects high-voltage switch gear.
The embodiment of the present invention is by first determining whether whether electromotor occurs overfrequency event；If so, then judge on-load switch again
Whether close；If so, high-voltage switch gear is then finally disconnected；Due to when overfrequency event occurs, having considered the state of on-load switch, prevent
Stopped the false tripping of high-voltage switch gear, thus be smoothed out maintenance work, unit rise state is fast and safety that ensure that unit.
Description of the drawings
In order to be illustrated more clearly that embodiment of the present invention technical scheme, embodiment will be described below needed for be used
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are some embodiments of the present invention, for this area general
For logical technical staff, on the premise of not paying creative work, can be with according to these other accompanying drawings of accompanying drawings acquisition.
Fig. 1 is an exemplary flow of a kind of method that prevents the unexpected shutdown of nuclear-power reactor that the embodiment of the present invention provides Figure;
Fig. 2 is a kind of another exemplary flow of method for preventing nuclear-power reactor accident shutdown provided in an embodiment of the present invention
Figure；
Fig. 3 is an a kind of schematic frame of device for preventing nuclear-power reactor accident shutdown provided in an embodiment of the present invention
Figure；
Fig. 4 is a kind of another schematic frame of device for preventing nuclear-power reactor accident shutdown provided in an embodiment of the present invention
Figure；
Fig. 5 is that a kind of device overfrequency event for preventing nuclear-power reactor accident shutdown provided in an embodiment of the present invention judges list
One schematic block diagram of unit；
Fig. 6 is that a kind of device overfrequency event for preventing nuclear-power reactor accident shutdown provided in an embodiment of the present invention judges list
Another schematic block diagram of unit.
Specific embodiment
Accompanying drawing in below in conjunction with the embodiment of the present invention, to the embodiment of the present invention in technical scheme carry out clear, complete describe wholely, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiment .It is based on this Embodiment in bright, the every other enforcement obtained under the premise of creative work is not made by those of ordinary skill in the art Example, belongs to the scope of protection of the invention.
It should be appreciated that when using in this specification and in the appended claims, term " including " and "comprising" are indicated
The presence of described feature, entirety, step, operation, element and/or component, but it is not precluded from one or more of the other feature, whole
The presence or interpolation of body, step, operation, element, component and/or its set.
It is also understood that the term used in this description of the invention is merely for the sake of the mesh for describing specific embodiment
And be not intended to limit the present invention.As used in description of the invention and appended claims, unless on
Other situations are hereafter clearly indicated, and otherwise " one " of singulative, " one " and " being somebody's turn to do " is intended to include plural form.
It will be further appreciated that, the term "and/or" used in description of the invention and appended claims is
Refer to the one or more any combinations in the associated item that lists and be possible to combine, and combine including these.
As in this specification and in the appended claims as use, term " if " can be according to context quilt
Be construed to " when ... " or " once " or " in response to determining " or " in response to detecting ".Similarly, phrase " if it is determined that " or
" if detecting [described condition or event] " can be interpreted to mean according to context " once it is determined that " or " in response to true
Fixed " or " once detecting [described condition or event] " or " in response to detecting [described condition or event] ".
Referring to Fig. 1, Fig. 1 is that the embodiment of the present invention provides a kind of signal stream of the method for preventing nuclear-power reactor accident shutdown
Cheng Tu.Prevent the method for nuclear-power reactor accident shutdown from may include following steps as depicted：
Prevent nuclear-power reactor accident shutdown method be applied in nuclear power plant system, nuclear power plant system include electromotor,
On-load switch, transformator, high-voltage switch gear and power system, electromotor in nuclear power plant system with on-load switch, transformator, high pressure
Switch and power system are sequentially connected and connect.
In a step 101, judge whether electromotor occurs overfrequency event.
Wherein, overfrequency event is event of the persistent period more than duration threshold, and the persistent period is the outlet of electromotor
Time of the frequency of voltage more than or equal to frequency threshold.
In step 102a, if so, then judge whether on-load switch closes.
Step 102a can be specially：The voltage at the auxiliary contact two ends of detection load switch, and judged according to the voltage
Whether on-load switch closes.Wherein, judge that the step of whether on-load switch closes further is specially according to the voltage：When the electricity
When pressure is more than or equal to voltage threshold, then judge that on-load switch disconnects；When the voltage is less than voltage threshold, then judge that load is opened
Close and close.
In step 102b, if it is not, then maintaining the closure of high-voltage switch gear.
If as electromotor does not occur overfrequency event, therefore generator operation state is normal, need not disconnect high-voltage switch gear.
In step 103a, high-voltage switch gear is if so, then disconnected.
Wherein, during execution step 101 to step 103a, step 101 is when judging that electromotor occurs overfrequency event
The first high level signal is exported, step 102a exports the second high level signal when judging that on-load switch is closed, and step 103a is again
First high level signal and the second high level signal are carried out and computing, so as to obtain the trigger of high level, the triggering letter
Number control high-voltage switch gear disconnection.
In step 103b, if it is not, then maintaining the closure of high-voltage switch gear.
As on-load switch is not closed, therefore electromotor is to disconnect with the link of power system, therefore without the need for disconnecting height again
Compress switch.
Wherein, during execution step 101 to step 103b, step 101 is when judging that electromotor occurs overfrequency event
The first high level signal is exported, step 102a exports the first low level signal, step 103a when judging that on-load switch is not closed
Again the first high level signal and the first low level signal are carried out and computing, so as to obtain low level invalid trigger,
The invalid trigger maintains the closure of high-voltage switch gear.
Referring to Fig. 2, Fig. 2 is that the embodiment of the present invention provides a kind of another kind of the method for preventing nuclear-power reactor accident shutdown
Schematic flow diagram.The as shown in Figure 2 method for preventing nuclear-power reactor accident shutdown may include following steps：
In step 201, default frequency threshold is associated with default duration threshold and is preserved to data base.
Wherein, there is steam turbine mechanical fatigue when duration threshold is run for electromotor under frequency threshold and cause steam turbine
The time of damage.
Step 201 is specially：An array is generated, to characterize the pass between generator frequency threshold value and duration threshold
System.
Frequency threshold includes that first frequency threshold value, second frequency threshold value and the 3rd frequency threshold, duration threshold include
First duration threshold, the second duration threshold and the 3rd duration threshold.Wherein, first frequency threshold value can be
50.5Hz, second frequency threshold value can be 51Hz, and the 3rd frequency threshold can be 51.5Hz, and the first duration threshold can be
180 minutes, the second duration threshold can be 5 minutes, and the 3rd duration threshold can be 0 minute.
In step 202., the frequency of the exit potential of electromotor is obtained in real time.
Wherein, step 202 can specifically include：
Voltage sample is carried out to the exit potential of electromotor；
Voltage sample value is amplified；
Voltage sample value after by amplification is compared with predetermined reference voltage, and obtains Preset Time (such as 1 minute)
Number of times of the sampled value after interior amplification more than reference voltage, to obtain the frequency of the exit potential of electromotor.
Wherein, number of times of the sampled value after amplifying in Preset Time more than reference voltage is obtained, to obtain going out for electromotor
The step of frequency of mouth voltage, can be specially：Number of times of the sampled value after amplifying in Preset Time more than reference voltage is obtained,
And using number of times divided by Preset Time business as the exit potential of electromotor frequency.
In step 203, judge whether at least one of multiple frequency thresholds frequency threshold is less than the outlet of electromotor
The frequency of voltage.
If (i.e. multiple frequency thresholds are all higher than frequency) is judged as NO in step 203, show overfrequency event, institute
So that any process need not be made.
In step 204, the one or more frequency thresholds less than frequency are set to one or more target frequencies then if so,
Rate threshold value, is obtained and one or more target frequency threshold values one or more persistent period correspondingly respectively according to frequency,
And when obtaining one or more correspondingly with one or more target frequency threshold values lasting respectively in the data base for prestoring
Between threshold value.Wherein, the persistent period is remained above for frequency or the time equal to target frequency threshold value.
Step 204 can be specially：The data base that prestores of traversal, obtain respectively with one or more target frequency threshold values one
One corresponding one or more duration thresholds, wherein, data base prestores electromotor under different target frequency threshold
Duration threshold.
In step 205, determine whether that at least one persistent period was more than corresponding duration threshold.
If the neither one persistent period, more than corresponding duration threshold, shows overfrequency event, without the need for making
Any process.
Wherein, step 201 to step 206 is the concrete implementation procedure of the step 101 in Fig. 1.
In step 206, if so, then judge whether on-load switch closes.
Step 206 can be specially：The voltage of the transformer side of detection load switch, and judge that load is opened according to the voltage
Close and whether close.Judge whether on-load switch closes according to the voltage to be further specially：When the voltage is more than or equal to voltage
During threshold value, then judge that on-load switch is closed；When the voltage is less than voltage threshold, then judge that on-load switch disconnects.
In step 207a, high-voltage switch gear is if so, then disconnected.
Wherein, during execution step 205 to step 207a, step 205 is more than judging at least one persistent period
The first high level signal is exported during corresponding duration threshold, and step 206 output second when judging that on-load switch is closed is high
First high level signal and the second high level signal are made and computing by level signal, step 207a again, so as to obtain high level
Trigger, the trigger control the disconnection of high-voltage switch gear.
In step 207b, if it is not, then maintaining the closure of high-voltage switch gear.
If on-load switch is not closed, electromotor is to disconnect with the link of power system, therefore without the need for disconnecting high pressure again
Switch.
Wherein, during execution step 205 to step 207b, step 205 is more than judging at least one persistent period
The first high level signal is exported during corresponding duration threshold, and step 206 exports first when judging that on-load switch is not closed
First high level signal and the first low level signal are made and computing by low level signal, step 207b again, so as to obtain low level
Invalid trigger, the invalid trigger maintains the closure of high-voltage switch gear.
In order to realize that the above-mentioned method for preventing nuclear-power reactor accident shutdown, the embodiment of the present invention additionally provide one kind and prevent
The device of nuclear-power reactor accident shutdown, the device are applied in nuclear power plant system, and nuclear power plant system includes that electromotor, load are opened
Pass, transformator, high-voltage switch gear and power system, electromotor in nuclear power plant system with on-load switch, transformator, high-voltage switch gear with
And power system is sequentially connected and connects.Referring to Fig. 3, Fig. 3 prevents nuclear-power reactor from surprisingly stopping for one kind provided in an embodiment of the present invention
One schematic block diagram of the device of heap.The each unit that terminal 30 in this example includes is used for executing in the corresponding embodiments of Fig. 1
Each step, specifically refer to the corresponding embodiments of Fig. 1 and Fig. 1, do not repeat herein.Prevent nuclear-power reactor accident shutdown
Device 30 includes overfrequency event judging unit 310, on-load switch judging unit 320 and switching units 330.
Overfrequency event judging unit 310, for judging whether electromotor occurs overfrequency event.
On-load switch judging unit 320, if judging that electromotor occurs overfrequency event for overfrequency event judge module, sentences
Whether disconnected on-load switch closes.
Switching units 330, if judging that on-load switch is closed for on-load switch judging unit, disconnect high-voltage switch gear.
Wherein, if specifically for overfrequency event judge module, on-load switch judging unit 320 judges that electromotor occurs overfrequency
Event, the voltage of two side of auxiliary contact of detection load switch, and judge whether on-load switch closes according to the voltage.Load
According to the voltage, switch judging unit 320 judges that the process whether on-load switch closes further is specially：When the voltage is more than
Or when being equal to voltage threshold, then judge that on-load switch disconnects；When the voltage is less than voltage threshold, then judge that on-load switch is closed
Close.
In another kind of embodiment, as shown in figure 4, the above-mentioned device 30 for preventing nuclear-power reactor accident shutdown can also be wrapped
Include maintenance unit 340.The each unit that the device 30 for preventing nuclear-power reactor accident shutdown in this example includes is used for executing Fig. 2
Each step in corresponding embodiment, specifically refers to the corresponding embodiments of Fig. 2 and Fig. 2, does not repeat herein.
Maintenance unit 340, if judging that on-load switch is not closed for on-load switch judging unit, maintains high-voltage switch gear
Closure.
As shown in figure 4, overfrequency event judging unit 310 includes frequency acquisition unit 311, frequency judging unit 312, continues
Time acquisition unit 313 and persistent period judging unit 314.
Frequency acquisition unit 311, for obtaining the frequency of the exit potential of electromotor in real time.
Wherein, frequency acquisition unit 311 specifically for：
Voltage sample is carried out to the exit potential of electromotor；
Voltage sample value is amplified；
Voltage sample value after by amplification is compared with predetermined reference voltage, and obtains Preset Time (such as 1 minute)
Number of times of the sampled value after interior amplification more than reference voltage, to obtain the frequency of the exit potential of electromotor.
Frequency acquisition unit 311 obtains number of times of the sampled value after amplifying in Preset Time more than reference voltage, to obtain
The process of the frequency of the exit potential of electromotor further can be specially：Obtain the sampled value after amplifying in Preset Time to be more than
The number of times of reference voltage, and using number of times divided by Preset Time business as the exit potential of electromotor frequency.
Whether frequency judging unit 312, for judging at least one of multiple frequency thresholds frequency threshold less than frequency.
Frequency threshold includes that first frequency threshold value, second frequency threshold value and the 3rd frequency threshold, duration threshold include
First duration threshold, the second duration threshold and the 3rd duration threshold.
Persistent period acquiring unit 313, if judge at least one of multiple frequency thresholds frequency for frequency judging unit
Rate threshold value is less than frequency, then the one or more frequency thresholds less than frequency are set to one or more target frequency threshold values, root
Obtain respectively and one or more target frequency threshold values one or more persistent period correspondingly according to frequency, and prestoring
Obtained in data base respectively and one or more target frequency threshold values one or more duration thresholds correspondingly；Its
In, the persistent period is remained above for frequency or the time equal to target frequency threshold value.
Wherein, persistent period acquiring unit 313 is specifically for traveling through the data base that prestores, obtain respectively with one or more
Target frequency threshold value one or more duration thresholds correspondingly, wherein, data base prestores electromotor in different mesh
Duration threshold under mark frequency threshold.
Persistent period judging unit 314, for determining whether that at least one persistent period was more than the corresponding persistent period
Threshold value.
As shown in figure 5, overfrequency event judging unit 310 also includes storage unit 315.
Storage unit 315, for associating default frequency threshold with default duration threshold and preserving to data
Storehouse.
Wherein, storage unit 315 specifically for generate an array, to characterize generator frequency threshold value and persistent period threshold
Relation between value.
Those of ordinary skill in the art are it is to be appreciated that the list of each example described with reference to the embodiments described herein
Unit and algorithm steps, can with electronic hardware, computer software or the two be implemented in combination in, in order to clearly demonstrate hardware
With the interchangeability of software, composition and the step of each example is generally described in the above description according to function.This
A little functions are executed with hardware or software mode actually, the application-specific and design constraint depending on technical scheme.Specially
Industry technical staff can use different methods to realize described function to each specific application, but this realization is not
It is considered as beyond the scope of this invention.
Those skilled in the art can be understood that, for convenience of description and succinctly, the end of foregoing description
End and the specific work process of unit, may be referred to the corresponding process in preceding method embodiment, will not be described here.
In several embodiments provided herein, it should be understood that disclosed terminal and method, which can be passed through
Its mode is realized.For example, device embodiment described above is only schematically, for example division of the unit, only
Only a kind of division of logic function, can have other dividing mode, for example multiple units or component tie when actually realizing
Close or be desirably integrated into another system, or some features can be ignored, or do not execute.In addition, shown or discussed phase
Coupling or direct-coupling or communication connection between mutually can be INDIRECT COUPLING or the communication by some interfaces, device or unit
Connection, or electricity, machinery or other forms connections.
The unit that illustrates as separating component can be or may not be physically separate, aobvious as unit
The part for showing can be or may not be physical location, you can be located at a place, or can also be distributed to multiple
On NE.Some or all of unit therein can be selected according to the actual needs to realize embodiment of the present invention scheme
Purpose.
In addition, each functional unit in each embodiment of the invention can be integrated in a processing unit, it is also possible to
It is that unit is individually physically present, or two or more units are integrated in a unit.Above-mentioned integrated
Unit both can be realized in the form of hardware, it would however also be possible to employ the form of SFU software functional unit is realized.
If the integrated unit is realized and as independent production marketing or use using in the form of SFU software functional unit
When, can be stored in a computer read/write memory medium.Such understanding is based on, technical scheme is substantially
The part that in other words prior art is contributed, or all or part of the technical scheme can be in the form of software product
Embody, the computer software product is stored in a storage medium, use so that a computer including some instructions
Equipment (can be personal computer, server, or network equipment etc.) executes the complete of each embodiment methods described of the invention
Portion or part steps.And aforesaid storage medium includes：USB flash disk, portable hard drive, read only memory (ROM, Read-Only
Memory), random access memory (RAM, Random Access Memory), magnetic disc or CD etc. are various can store journey
The medium of sequence code.Step in present invention method can carry out order adjustment according to actual needs, merge and delete.
Unit in embodiment of the present invention terminal can be merged according to actual needs, divides and be deleted.
The above, the only specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, various equivalent modifications can be readily occurred in or replaced
Change, these modifications or replacement should all be included within the scope of the present invention.Therefore, protection scope of the present invention should be with right
The protection domain of requirement is defined.
Claims (16)
1. a kind of prevent nuclear-power reactor accident shutdown method, the electromotor in nuclear power plant system with on-load switch, change
Depressor, high-voltage switch gear and power system are sequentially connected and connect, it is characterised in that methods described includes：
Judge whether electromotor occurs overfrequency event；
If so, then judge whether the on-load switch closes；
If so, the high-voltage switch gear is then disconnected.
2. method according to claim 1, it is characterised in that described judge whether electromotor occurs overfrequency event and include：
The frequency of the exit potential of electromotor is obtained in real time；
Judge at least one of the plurality of frequency threshold frequency threshold whether less than the frequency；
If so, the one or more frequency thresholds less than the frequency are set to one or more target frequency threshold values then, according to
The frequency acquisition respectively with one or more of target frequency threshold values one or more persistent period correspondingly, and
When obtaining one or more correspondingly with one or more of target frequency threshold values lasting respectively in the data base for prestoring
Between threshold value；Wherein, the persistent period is that the frequency is remained above or the time equal to target frequency threshold value；
Determine whether that at least one persistent period was more than corresponding duration threshold；
If so, then execute and described the step of whether on-load switch closes judged.
3. method according to claim 2, it is characterised in that the frequency of the real-time exit potential for obtaining electromotor it
Front also include：
Default frequency threshold is associated with default duration threshold and is preserved to the data base.
4. method according to claim 1, it is characterised in that the frequency bag of the real-time exit potential for obtaining electromotor
Include：
Voltage sample is carried out to the exit potential of electromotor；
Voltage sample value is amplified；
Voltage sample value after by amplification is compared with predetermined reference voltage, and obtains the sampled value after amplifying in Preset Time
More than the number of times of reference voltage, to obtain the frequency of the exit potential of the electromotor.
5. method according to claim 2, it is characterised in that described first frequency threshold is included according to the frequency threshold
Value, second frequency threshold value and the 3rd frequency threshold, when the duration threshold includes that the first duration threshold, second continue
Between threshold value and the 3rd duration threshold.
6. method according to claim 1, it is characterised in that it is negative that the judgement is connected with the electromotor and transformator
Whether lotus switch also includes after closing：
If it is not, then maintaining the closure of the high-voltage switch gear.
7. method according to claim 1, it is characterised in that described judge whether the on-load switch closes specially：
The voltage at the auxiliary contact two ends of the on-load switch is detected, and judges whether the on-load switch closes according to the voltage
Close.
8. method according to claim 7, it is characterised in that described whether the on-load switch is judged according to the voltage
Closure is specially：
When the voltage is more than or equal to voltage threshold, then judge that the on-load switch disconnects；When the voltage is less than described
During voltage threshold, then judge the on-load switch closure.
9. a kind of prevent nuclear-power reactor accident shutdown device, the electromotor in nuclear power plant system with on-load switch, change
Depressor, high-voltage switch gear and power system are sequentially connected and connect, it is characterised in that include：
Overfrequency event judging unit, for judging whether electromotor occurs overfrequency event；
On-load switch judging unit, if judging that electromotor occurs overfrequency event for overfrequency event judge module, judges described
Whether on-load switch closes；
Switching units, if judging that on-load switch is closed for on-load switch judging unit, disconnect the high-voltage switch gear.
10. according to claim 9 prevent nuclear-power reactor accident shutdown device, it is characterised in that the overfrequency thing
Part judging unit includes：
Frequency acquisition unit, for obtaining the frequency of the exit potential of electromotor in real time；
Whether frequency judging unit, for judging at least one of the plurality of frequency threshold frequency threshold less than the frequency
Rate；
Persistent period acquiring unit, if judge at least one of the plurality of frequency threshold frequency threshold for frequency judging unit
Value is less than frequency, then the one or more frequency thresholds less than the frequency are set to one or more target frequency threshold values, root
Obtain respectively and one or more of target frequency threshold values one or more persistent period correspondingly according to the frequency, and
Obtain in the data base for prestoring one or more correspondingly with one or more of target frequency threshold values lasting respectively
Time threshold；Wherein, the persistent period is that the frequency is remained above or the time equal to target frequency threshold value；
Persistent period judging unit, for determining whether that at least one persistent period was more than corresponding duration threshold.
11. devices for preventing nuclear-power reactor accident shutdown according to claim 10, it is characterised in that the overfrequency thing
Part judging unit also includes：
Storage unit, for associating the frequency threshold for prestoring with the duration threshold for prestoring and preserving to the data base.
12. devices for preventing nuclear-power reactor accident shutdown according to claim 10, it is characterised in that the frequency threshold
Value includes first frequency threshold value, second frequency threshold value and the 3rd frequency threshold, when the duration threshold includes first persistently
Between threshold value, the second duration threshold and the 3rd duration threshold.
13. devices for preventing nuclear-power reactor accident shutdown according to claim 10, it is characterised in that the frequency is obtained
Take unit specifically for：
Voltage sample is carried out to the exit potential of electromotor；
Voltage sample value is amplified；
Voltage sample value after by amplification is compared with predetermined reference voltage, and obtains the sampled value after amplifying in Preset Time
More than the number of times of reference voltage, to obtain the frequency of the exit potential of the electromotor.
14. devices for preventing nuclear-power reactor accident shutdown according to claim 9, it is characterised in that also include：
Maintenance unit, if judging that on-load switch is not closed for on-load switch judging unit, maintains the closure of high-voltage switch gear.
15. devices for preventing nuclear-power reactor accident shutdown according to claim 9, it is characterised in that the load is opened
Close judging unit and judge that the process whether on-load switch closes is specially：
The voltage at the auxiliary contact two ends of the on-load switch is detected, and judges whether the on-load switch closes according to the voltage
Close.
16. methods according to claim 15, it is characterised in that the on-load switch judging unit is sentenced according to the voltage
The process whether on-load switch that breaks closes is specially：
When the voltage is more than or equal to voltage threshold, then judge that the on-load switch disconnects；When the voltage is less than described
During voltage threshold, then judge the on-load switch closure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610911626.7A CN106504809B (en) | 2016-10-19 | 2016-10-19 | A kind of method and device for preventing nuclear-power reactor accident shutdown |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610911626.7A CN106504809B (en) | 2016-10-19 | 2016-10-19 | A kind of method and device for preventing nuclear-power reactor accident shutdown |
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