CN109066960A - A kind of nuclear power unit standby power supply device and its control method - Google Patents
A kind of nuclear power unit standby power supply device and its control method Download PDFInfo
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- CN109066960A CN109066960A CN201810961477.4A CN201810961477A CN109066960A CN 109066960 A CN109066960 A CN 109066960A CN 201810961477 A CN201810961477 A CN 201810961477A CN 109066960 A CN109066960 A CN 109066960A
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- circuit breaker
- medium voltage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/066—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems characterised by the use of dynamo-electric machines
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/08—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems requiring starting of a prime-mover
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
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- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Stand-By Power Supply Arrangements (AREA)
Abstract
The invention belongs to nuclear power station backup power source running technology fields, more particularly to a kind of nuclear power unit standby power supply device and its control method, include: that No.1 starting change is connect with two groups of link cables of No. two startings accommodations, has been sequentially connected in series Medium voltage switch or circuit breaker A, interconnection switch A, interconnection switch C and Medium voltage switch or circuit breaker I on one group of link cable；Medium voltage switch or circuit breaker B, interconnection switch B, interconnection switch D and Medium voltage switch or circuit breaker J have been sequentially connected in series on another group of link cable；The No.1 starting is additionally provided with the normal bus of No.1 unit 6kV in becoming, and is divided into 1 to 4 section on the normal bus of the No.1 unit 6kV；No. two startings are provided with No. two normal buses of unit 6kV in becoming, and are divided into 1 to 4 section on the normal bus of No. two unit 6kV.The reliability of nuclear power unit backup power source can be improved in the present invention.
Description
Technical field
The invention belongs to nuclear power station backup power source running technology fields, and in particular to a kind of nuclear power unit standby power supply device
And its control method.
Background technique
Altogether loss of off-site power accident twice had occurred for certain nuclear power station since quotient transports, and accident is in standby electricity twice
In source 220kV line maintenance or 500kV main transformer maintenance process, i.e., in the case that unit only has external power all the way, superposition operation
Caused by equipment fault.Successfully classification is opened for the unit diesel engine of the nuclear power plant accident unit and Emergency diesel in event twice
Dynamic, band carries, the refrigerating function after completing reactor safety shutdown and shutdown.
The process of loss of off-site power accident treatment twice is looked back, power station is all in accordance with " at the beginning of certain nuclear power station Emergency classification
Beginning condition and emergency action level " in condition as defined in S1.1 item, operated normally in all 6.3kV for meeting any unit
Power supply system power loss or failure, duration are more than 15 minutes, enter emergency standby state.In station service Restoration stage, most
It is all to have restored power supply by station service of the backup power source to accident unit, but the time spent is partially long eventually.In first time event,
Restore the starting to accident unit from 220kV route and become power supply, then restores the power supply to station service bus again, take about 3
The time of hour.In second of event, link cable recovery is crossed to the station service of accident unit from the starting accommodation of neighbouring unit
Power supply, takes about 3 hours time.
Before station service recovery, the cooling power supply after reactor shutdown can only be mentioned by unit diesel engine and Emergency diesel
For the pressure of diesel engine operation is larger, while causing great threat to the control of the state of unit and nuclear safety.In view of backup power source
For ensuring that the safe operation of nuclear power unit is of great significance, therefore need to design a kind of for promoting nuclear power unit standby electricity
The method of source reliability, has solved above-mentioned technical problem.
Summary of the invention
Object of the present invention is to design a kind of nuclear power unit standby power supply device and its control in view of the above shortcomings of the prior art
Method processed, for improving the reliability of nuclear power unit backup power source.
The technical scheme is that
A kind of nuclear power unit standby power supply device, comprising: No.1 starting, which becomes, crosses two groups of link cables with No. two startings accommodations
It connects, has been sequentially connected in series Medium voltage switch or circuit breaker A, interconnection switch A, interconnection switch C and Medium voltage switch or circuit breaker I on one group of link cable；Separately
Medium voltage switch or circuit breaker B, interconnection switch B, interconnection switch D and Medium voltage switch or circuit breaker J have been sequentially connected in series on one group of link cable；The No.1 starting
Become downstream and be additionally provided with the normal bus of No.1 unit 6kV, is divided into 1 to 4 section on the normal bus of the No.1 unit 6kV；Described two
Number starting become downstream be provided with No. two normal buses of unit 6kV, be divided into 1 to 4 section on the normal bus of No. two unit 6kV.
1 section on the normal bus of No.1 unit 6kV as described above has been arranged in parallel Medium voltage switch or circuit breaker R and Medium voltage switch or circuit breaker D；No.1
2 sections on the normal bus of unit 6kV have been arranged in parallel Medium voltage switch or circuit breaker E and Medium voltage switch or circuit breaker S；3 on the normal bus of No.1 unit 6kV
Section has been arranged in parallel Medium voltage switch or circuit breaker T and Medium voltage switch or circuit breaker G；4 sections on the normal bus of No.1 unit 6kV have been arranged in parallel Medium voltage switch or circuit breaker
H and Medium voltage switch or circuit breaker U.
Medium voltage switch or circuit breaker D as described above is connect with Medium voltage switch or circuit breaker E, and Medium voltage switch or circuit breaker G is connected with Medium voltage switch or circuit breaker H, and medium pressure is opened
R, Medium voltage switch or circuit breaker S, Medium voltage switch or circuit breaker T and Medium voltage switch or circuit breaker U is closed to power by the HV Auxiliary Transformer of No.1 unit.
Section on the normal bus of No. two unit 6kV as described above has been arranged in parallel Medium voltage switch or circuit breaker V and Medium voltage switch or circuit breaker M；No. two
Section on the normal bus of unit kV has been arranged in parallel Medium voltage switch or circuit breaker N and Medium voltage switch or circuit breaker W；Section on No. two normal buses of unit 6kV
It has been arranged in parallel Medium voltage switch or circuit breaker X and Medium voltage switch or circuit breaker P；Section on No. two normal buses of unit kV be arranged in parallel Medium voltage switch or circuit breaker Q and
Medium voltage switch or circuit breaker Y.
Medium voltage switch or circuit breaker M as described above is connect with Medium voltage switch or circuit breaker N, and Medium voltage switch or circuit breaker P is connected with Medium voltage switch or circuit breaker Q, and medium pressure is opened
Close the HV Auxiliary Transformer power supply of V, Medium voltage switch or circuit breaker W, Medium voltage switch or circuit breaker X and Medium voltage switch or circuit breaker Y by No. two units.
A kind of control method of nuclear power unit standby power supply device as described above, including step control as follows:
Step 1: when normal condition, the Medium voltage switch or circuit breaker A of No.1 unit, Medium voltage switch or circuit breaker B, Medium voltage switch or circuit breaker C, Medium voltage switch or circuit breaker F,
Medium voltage switch or circuit breaker R, Medium voltage switch or circuit breaker S, Medium voltage switch or circuit breaker T, Medium voltage switch or circuit breaker U and interconnection switch B are in "on" position, Medium voltage switch or circuit breaker D, middle pressure
Switch E, Medium voltage switch or circuit breaker G, Medium voltage switch or circuit breaker H and interconnection switch A are in operating position gate-dividing state；The 6kV of No.1 unit is normally female
1 section to 4 sections of line is passed through the high pressure factory of No.1 unit by Medium voltage switch or circuit breaker R, Medium voltage switch or circuit breaker S, Medium voltage switch or circuit breaker T and Medium voltage switch or circuit breaker U respectively
Use transformer-supplied；
Step 2: when normal condition, the Medium voltage switch or circuit breaker I of No. two units, Medium voltage switch or circuit breaker J, Medium voltage switch or circuit breaker K, Medium voltage switch or circuit breaker L,
Medium voltage switch or circuit breaker V, Medium voltage switch or circuit breaker W, Medium voltage switch or circuit breaker X, Medium voltage switch or circuit breaker Y and interconnection switch C are in "on" position, Medium voltage switch or circuit breaker M, middle pressure
Switch N, Medium voltage switch or circuit breaker P, Medium voltage switch or circuit breaker Q and interconnection switch D are in operating position gate-dividing state；The 6kV of No. two units is normally female
1 section to 4 sections of line is passed through the high pressure factory of No. two units by Medium voltage switch or circuit breaker V, Medium voltage switch or circuit breaker W, Medium voltage switch or circuit breaker X and Medium voltage switch or circuit breaker Y respectively
Use transformer-supplied.
Step 3: when the HV Auxiliary Transformer failure of No.1 unit malfunction No.1 unit, then Medium voltage switch or circuit breaker R,
Medium voltage switch or circuit breaker S, Medium voltage switch or circuit breaker T and Medium voltage switch or circuit breaker U tripping；Medium voltage switch or circuit breaker D, Medium voltage switch or circuit breaker E, Medium voltage switch or circuit breaker G and Medium voltage switch or circuit breaker H are certainly
Dynamic circuit connector lock, if No.1 starting accident barrier, Medium voltage switch or circuit breaker A and Medium voltage switch or circuit breaker B tripping occurs again at this time, No.1 unit will be lost at this time
Remove off-site power, closed on by closing interconnection switch A unit starting become faster quick-recovery No.1 unit column auxiliary bus bar power supply,
After station service restores, the diesel engine run on corresponding emergency bus is disconnected by anti-synchronizing mode, alleviates diesel engine continuous operation
Pressure, the control of the state in power station and nuclear safety are provided safeguard.
Step 4: when the HV Auxiliary Transformer failure of No. two units of No. two unit malfunctions, then Medium voltage switch or circuit breaker V,
Medium voltage switch or circuit breaker W, Medium voltage switch or circuit breaker X and Medium voltage switch or circuit breaker Y tripping；Medium voltage switch or circuit breaker M, Medium voltage switch or circuit breaker N, Medium voltage switch or circuit breaker P and Medium voltage switch or circuit breaker Q are certainly
Dynamic circuit connector lock, if No. two starting accident barriers, Medium voltage switch or circuit breaker I and Medium voltage switch or circuit breaker J tripping occurs again at this time, No. two units will be lost at this time
Off-site power is removed, the starting that unit is closed on by closing interconnection switch D becomes faster quick-recovery No. two unit column auxiliary bus bars power supply,
After station service restores, the diesel engine run on corresponding emergency bus is disconnected by anti-synchronizing mode, alleviates diesel engine and continuously transports
Capable pressure provides safeguard the state control in power station and nuclear safety.
One kind designed by the present invention, has the advantages that
In view of backup power source for ensuring that the safe operation of nuclear power unit is of great significance, therefore to raising unit reserve
Power supply reliability shortens the recovery time of failure unit reserve power supply in the case of single unit loss of off-site power accident, thus
By accident unit allocation within operation limits, ensure that the research of unit nuclear safety is particularly important.
The present invention is by setting about switch mode of operation, the method for operation, emergency preplan, operating file etc., to two
Link cable between starting change optimizes management, realizes failure unit reserve electricity in the case of improving loss of off-site power accident
The recovery time in source, it is ensured that in loss of off-site power accident, can be become by two unit startings between link cable, from
Close on unit starting become faster quick-recovery failure unit one arrange the normal bus of 6kV power supply requirement；To between two startings changes
Link cable and switch have carried out capacity accounting and series of optimum, specify the reasonable method of operation, achieve following application
Achievement:
1. realizing the purpose that two startings become mutual backup, the reliable of certain nuclear power station first stage of the project backup power source is improved
Property；
2. opening a single unit to occur under loss of off-site power accident conditions, fast quick-recovery failure unit station service
The new route of one column bussed supply；
3. the recovery time of failure unit reserve power supply in the case of single unit loss of off-site power accident is substantially reduced,
And it can be relieved the pressure of diesel engine continuous operation；
4. the state in pair power station controls and nuclear safety provides powerful guarantee, in the case of improving loss of off-site power accident
The whole emergency response capability in power station.
The method of operation of link cable is run through the invention between certain 1 phase of nuclear power station engineering two starting changes at present
File is solidified, and to realize the purpose of two unit reserve power supply mutual backup, improve 1 phase engineering backup power source can
By property.The mode of operation of interconnection switch can be greatly shortened single unit and be lost factory by being changed to master control remote operation on the spot simultaneously
The recovery time of failure unit reserve power supply in the case of external power accident alleviates the pressure of diesel engine continuous operation, to power station
State control and nuclear safety provide a strong guarantee.By simulated maneuver, can be realized within 15 minutes by this supply path
Normal station service bus is arranged to accident unit one to restore electricity.And restore the station-service of accident unit before optimizing by backup power source
Electricity power supply at least needs to spend 3 hours time.
Result of design of the present invention has with reference to meaning the optimization operation of enlarging 3, No. 4 unit reserve power supplys of certain Nuclear Power Plant Project
Referring to the experience of 1 phase, the mode of operation of 3, No. 4 unit reserve power supply interconnection switches is directly designed to far for justice, 2 phase engineerings
Side's operation, it is subsequent to pass through its clear method of operation of operating file.
Result of design of the present invention also has certain reference to other domestic nuclear power station backup power source management.
Detailed description of the invention
Fig. 1 is a kind of nuclear power unit standby power supply device and its control method schematic diagram designed by the present invention；
Wherein, 1- Medium voltage switch or circuit breaker A；2- Medium voltage switch or circuit breaker B；3- interconnection switch A；4- interconnection switch B；5- Medium voltage switch or circuit breaker C；In 6-
Compress switch D；7- Medium voltage switch or circuit breaker E；8- Medium voltage switch or circuit breaker F；9- Medium voltage switch or circuit breaker G；10- Medium voltage switch or circuit breaker H；11- Medium voltage switch or circuit breaker I；It is pressed in 12-
Switch J；13- interconnection switch C；14- interconnection switch D；15- Medium voltage switch or circuit breaker K；16- Medium voltage switch or circuit breaker L；17- Medium voltage switch or circuit breaker M；In 18-
Compress switch N；19- Medium voltage switch or circuit breaker P；20- Medium voltage switch or circuit breaker Q；21- Medium voltage switch or circuit breaker R；22- Medium voltage switch or circuit breaker S；23- Medium voltage switch or circuit breaker T；24-
Medium voltage switch or circuit breaker U；25- Medium voltage switch or circuit breaker V；26- Medium voltage switch or circuit breaker W；27- Medium voltage switch or circuit breaker X；28- Medium voltage switch or circuit breaker Y.
Specific embodiment
The technology of the present invention is described further below:
A kind of nuclear power unit standby power supply device, comprising: No.1 starting, which becomes, crosses two groups of link cables with No. two startings accommodations
It connects, has been sequentially connected in series Medium voltage switch or circuit breaker A 1, interconnection switch A3, interconnection switch C13 and Medium voltage switch or circuit breaker on one group of link cable
I11；Medium voltage switch or circuit breaker B 2, interconnection switch B4, interconnection switch D14 and Medium voltage switch or circuit breaker J have been sequentially connected in series on another group of link cable
12；The No.1 starting becomes downstream and is additionally provided with the normal bus of No.1 unit 6kV, divides on the normal bus of the No.1 unit 6kV
It is 1 to 4 section；No. two startings become downstream and are provided with No. two normal buses of unit 6kV, the normal bus of No. two unit 6kV
On be divided into 1 to 4 section.
1 section on the normal bus of No.1 unit 6kV as described above has been arranged in parallel Medium voltage switch or circuit breaker R21 and Medium voltage switch or circuit breaker D6；
2 sections on the normal bus of No.1 unit 6kV have been arranged in parallel Medium voltage switch or circuit breaker E7 and Medium voltage switch or circuit breaker S22；No.1 unit 6kV is normally female
3 sections on line have been arranged in parallel Medium voltage switch or circuit breaker T 23 and Medium voltage switch or circuit breaker G9；4 sections of parallel connections on the normal bus of No.1 unit 6kV are set
It is equipped with Medium voltage switch or circuit breaker H10 and Medium voltage switch or circuit breaker U24.
Medium voltage switch or circuit breaker D6 as described above is connect with Medium voltage switch or circuit breaker E7, and Medium voltage switch or circuit breaker G9 is connected with Medium voltage switch or circuit breaker H10, it is described in
Compress switch the HV Auxiliary Transformer of R21, Medium voltage switch or circuit breaker S 22, Medium voltage switch or circuit breaker T 23 and Medium voltage switch or circuit breaker U24 by No.1 unit
Power supply.
1 section on the normal bus of No. two unit 6kV as described above has been arranged in parallel Medium voltage switch or circuit breaker V25 and Medium voltage switch or circuit breaker M17；
2 sections on No. two normal buses of unit 6kV have been arranged in parallel Medium voltage switch or circuit breaker N18 and Medium voltage switch or circuit breaker W26；No. two unit 6kV are normal
3 sections on bus have been arranged in parallel Medium voltage switch or circuit breaker X27 and Medium voltage switch or circuit breaker P19；4 sections of parallel connections on No. two normal buses of unit 6kV
It is provided with Medium voltage switch or circuit breaker Q20 and Medium voltage switch or circuit breaker Y28.
Medium voltage switch or circuit breaker M17 as described above is connect with Medium voltage switch or circuit breaker N18, and Medium voltage switch or circuit breaker P19 is connected with Medium voltage switch or circuit breaker Q20, institute
State the high-voltage Auxiliary transformation that Medium voltage switch or circuit breaker V25, Medium voltage switch or circuit breaker W26, Medium voltage switch or circuit breaker X27 and Medium voltage switch or circuit breaker Y28 pass through No. two units
Device power supply.
A kind of control method of nuclear power unit standby power supply device as described above, including step control as follows:
Step 1: when normal condition, the Medium voltage switch or circuit breaker A 1 of No.1 unit, Medium voltage switch or circuit breaker B 2, Medium voltage switch or circuit breaker C 5, middle pressure
Switch F 8, Medium voltage switch or circuit breaker R21, Medium voltage switch or circuit breaker S 22, Medium voltage switch or circuit breaker T 23, Medium voltage switch or circuit breaker U24 and interconnection switch B4, which are in, to close a floodgate
State, Medium voltage switch or circuit breaker D6, Medium voltage switch or circuit breaker E7, Medium voltage switch or circuit breaker G9, Medium voltage switch or circuit breaker H10 and interconnection switch A3 are in operating position separating brake
State；1 section to 4 sections of the normal bus of the 6kV of No.1 unit is respectively by Medium voltage switch or circuit breaker R 21, Medium voltage switch or circuit breaker S 22, Medium voltage switch or circuit breaker T
23 and Medium voltage switch or circuit breaker U24 is powered by the HV Auxiliary Transformer of No.1 unit；
Step 2: when normal condition, the Medium voltage switch or circuit breaker I11 of No. two units, Medium voltage switch or circuit breaker J 12, Medium voltage switch or circuit breaker K15, middle pressure
Switch L16, Medium voltage switch or circuit breaker V25, Medium voltage switch or circuit breaker W26, Medium voltage switch or circuit breaker X27, Medium voltage switch or circuit breaker Y28 and interconnection switch C13, which are in, to close a floodgate
State, Medium voltage switch or circuit breaker M17, Medium voltage switch or circuit breaker N18, Medium voltage switch or circuit breaker P19, Medium voltage switch or circuit breaker Q20 and interconnection switch D14 are in operating position
Gate-dividing state；1 section to 4 sections of the normal bus of the 6kV of No. two units is respectively by Medium voltage switch or circuit breaker V25, Medium voltage switch or circuit breaker W26, Medium voltage switch or circuit breaker
The HV Auxiliary Transformer power supply that X27 and Medium voltage switch or circuit breaker Y28 passes through No. two units.
Step 3: when the HV Auxiliary Transformer failure of No.1 unit malfunction No.1 unit, then Medium voltage switch or circuit breaker
R21, Medium voltage switch or circuit breaker S 22, Medium voltage switch or circuit breaker T 23 and Medium voltage switch or circuit breaker U24 tripping；Medium voltage switch or circuit breaker D6, Medium voltage switch or circuit breaker E7, Medium voltage switch or circuit breaker
G9 and Medium voltage switch or circuit breaker H10 automatic closing, if No.1 starting accident barrier, Medium voltage switch or circuit breaker A 1 and Medium voltage switch or circuit breaker B 2 occurs again at this time
Tripping, No.1 unit is by loss of off-site power at this time, and the starting that unit is closed on by closing interconnection switch A3 becomes faster quick-recovery one
The power supply of number 1 column auxiliary bus bar of unit disconnects the bavin run on corresponding emergency bus by anti-synchronizing mode after station service recovery
Oil machine alleviates the pressure of diesel engine continuous operation, provides safeguard to the state control in power station and nuclear safety.
Step 4: when the HV Auxiliary Transformer failure of No. two units of No. two unit malfunctions, then Medium voltage switch or circuit breaker
V25, Medium voltage switch or circuit breaker W26, Medium voltage switch or circuit breaker X27 and Medium voltage switch or circuit breaker Y28 tripping；Medium voltage switch or circuit breaker M17, Medium voltage switch or circuit breaker N18, Medium voltage switch or circuit breaker
P19 and Medium voltage switch or circuit breaker Q20 automatic closing, if No. two starting accident barriers, Medium voltage switch or circuit breaker I11 and Medium voltage switch or circuit breaker J occurs again at this time
12 trippings, No. two units are by loss of off-site power at this time, and the starting that unit is closed on by closing interconnection switch D14 becomes faster quick-recovery
No. two 1 column auxiliary bus bar of unit power supplies are disconnected on corresponding emergency bus by anti-synchronizing mode and are run after station service recovery
Diesel engine, alleviate the pressure of diesel engine continuous operation, the control of the state in power station and nuclear safety provided safeguard.
Design content combination of the present invention is implemented as follows one and is further described:
Capacity accounting is carried out first, and by consulting design data, certain nuclear power station first stage of the project two startings are lower and press branch
Between link cable section be 3 × 3 × (1 × 800mm2), electric current through-current capability is about 3420A.Single interconnection switch
Capacity is 3150A (capacity of 4 interconnection switches is identical).
The rated current of every starting low pressure side single branch is 2886A, and corresponding capacity is 31.5MVA.
Show that the capacity of two link cables and its interconnection switch meets the requirement that two startings become mutual band to this.
By calculating, when accident is to meet the control of unit reactivity and maximum capacity group that Core cooling needs is combined into
2.95MVA.It is 5.2MVA to realize that security function and containment radioactivity contain required load, therefore only needs to restore a column
The functions such as the control of unit reactivity and Core cooling, security function and the containing of containment radioactivity can be realized in bus.Due to two
Link cable and its interconnection switch can realize that two startings become the requirements of mutual band, can meet the capacity requirement of 63MVA, thus
It can be seen that the capacity and contact capacity of link cable can meet the capacity requirement of accident unit power load.
It follows that meeting unit loss of off-site power due to starting the link cable between becoming and switch and realizing that reactor core is cold
But, the supply load capacity requirement of the security functions such as reactivity control, cooling, the radioactivity containing in weary pond, when single unit loses
When off-site power accident, is actively become faster the power supply of quick-recovery failure unit by closing on the starting of unit, unit bavin can be mitigated
The operation of oil machine and Emergency diesel is born, and realizes not stopping for reliable bus and emergency bus by the anti-synchronization device of diesel engine
Electrical switching operation, the diesel engine that can be stopped transport in associated bus after handover success, and as stand-by state.
The present invention is explained in detail above in conjunction with embodiment, but the present invention is not limited to above-described embodiments, at this
Field those of ordinary skill within the scope of knowledge, can also make various changes without departing from the purpose of the present invention
Change.The content being not described in detail in the present invention can use the prior art.
Claims (8)
1. a kind of nuclear power unit standby power supply device characterized by comprising No.1 starting, which becomes, crosses two groups with No. two startings accommodations
Link cable connects, and has been sequentially connected in series Medium voltage switch or circuit breaker A (1), interconnection switch A (3), interconnection switch C on one group of link cable
(13) and Medium voltage switch or circuit breaker I (11)；Medium voltage switch or circuit breaker B (2), interconnection switch B (4), contact have been sequentially connected in series on another group of link cable
Switch D (14) and Medium voltage switch or circuit breaker J (12)；The No.1 starting is additionally provided with the normal bus of No.1 unit 6kV, the No.1 in becoming
It is divided into 1 to 4 section on the normal bus of unit 6kV；No. two startings are provided with No. two normal buses of unit 6kV in becoming, and described two
It is divided into 1 to 4 section on number normal bus of unit 6kV.
2. a kind of nuclear power unit standby power supply device as described in claim 1, it is characterised in that: the No.1 unit 6kV is just
1 section on normal bus has been arranged in parallel Medium voltage switch or circuit breaker R (21) and Medium voltage switch or circuit breaker D (6)；2 sections on the normal bus of No.1 unit 6kV
It has been arranged in parallel Medium voltage switch or circuit breaker E (7) and Medium voltage switch or circuit breaker S (22)；3 sections on the normal bus of No.1 unit 6kV have been arranged in parallel
Compress switch T (23) and Medium voltage switch or circuit breaker G (9)；4 sections on the normal bus of No.1 unit 6kV be arranged in parallel Medium voltage switch or circuit breaker H (10) and
Medium voltage switch or circuit breaker U (24).
3. a kind of nuclear power unit standby power supply device as claimed in claim 2, it is characterised in that: medium pressure switch D (6) and
Medium voltage switch or circuit breaker E (7) connection, Medium voltage switch or circuit breaker G (9) and Medium voltage switch or circuit breaker H (10) connection, medium pressure switch R (21), Medium voltage switch or circuit breaker S
(22), Medium voltage switch or circuit breaker T (23) and Medium voltage switch or circuit breaker U (24) is powered by the HV Auxiliary Transformer of No.1 unit.
4. a kind of nuclear power unit standby power supply device as claimed in claim 3, it is characterised in that: No. two unit 6kV are just
1 section on normal bus has been arranged in parallel Medium voltage switch or circuit breaker V (25) and Medium voltage switch or circuit breaker M (17)；2 on No. two normal buses of unit 6kV
Section has been arranged in parallel Medium voltage switch or circuit breaker N (18) and Medium voltage switch or circuit breaker W (26)；3 sections on No. two normal buses of unit 6kV have been arranged in parallel
Medium voltage switch or circuit breaker X (27) and Medium voltage switch or circuit breaker P (19)；4 sections on No. two normal buses of unit 6kV have been arranged in parallel Medium voltage switch or circuit breaker Q
(20) and Medium voltage switch or circuit breaker Y (28).
5. a kind of nuclear power unit standby power supply device as claimed in claim 4, it is characterised in that: medium pressure switch M (17)
Connect with Medium voltage switch or circuit breaker N (18), Medium voltage switch or circuit breaker P (19) and Medium voltage switch or circuit breaker Q (20) connection, medium pressure switch V (25), in press off
Close W (26), the HV Auxiliary Transformer power supply that Medium voltage switch or circuit breaker X (27) and Medium voltage switch or circuit breaker Y (28) pass through No. two units.
6. it is a kind of according to claim 1 to one of 5 the nuclear power unit standby power supply device control method, feature exists
In including step control as follows:
Step 1: when normal condition, the Medium voltage switch or circuit breaker A (1) of No.1 unit, Medium voltage switch or circuit breaker B (2), Medium voltage switch or circuit breaker C (5), in press off
Close F (8), Medium voltage switch or circuit breaker R (21), Medium voltage switch or circuit breaker S (22), Medium voltage switch or circuit breaker T (23), Medium voltage switch or circuit breaker U (24) and interconnection switch B (4)
In "on" position, Medium voltage switch or circuit breaker D (6), Medium voltage switch or circuit breaker E (7), Medium voltage switch or circuit breaker G (9), Medium voltage switch or circuit breaker H (10) and interconnection switch A
(3) it is in operating position gate-dividing state；1 section to 4 sections of the normal bus of the 6kV of No.1 unit is respectively by Medium voltage switch or circuit breaker R (21), middle pressure
Switch S (22), Medium voltage switch or circuit breaker T (23) and Medium voltage switch or circuit breaker U (24) are powered by the HV Auxiliary Transformer of No.1 unit；
Step 2: when normal condition, the Medium voltage switch or circuit breaker I (11) of No. two units, Medium voltage switch or circuit breaker J (12), Medium voltage switch or circuit breaker K (15), in
Compress switch L (16), Medium voltage switch or circuit breaker V (25), Medium voltage switch or circuit breaker W (26), Medium voltage switch or circuit breaker X (27), Medium voltage switch or circuit breaker Y (28) and interconnection switch
C (13) is in "on" position, Medium voltage switch or circuit breaker M (17), Medium voltage switch or circuit breaker N (18), Medium voltage switch or circuit breaker P (19), Medium voltage switch or circuit breaker Q (20) and connection
Network switch D (14) is in operating position gate-dividing state；1 section to 4 sections of the normal bus of the 6kV of No. two units is respectively by Medium voltage switch or circuit breaker V
(25), Medium voltage switch or circuit breaker W (26), Medium voltage switch or circuit breaker X (27) and Medium voltage switch or circuit breaker Y (28) are supplied by the HV Auxiliary Transformer of No. two units
Electricity.
7. a kind of control method of nuclear power unit standby power supply device as claimed in claim 6, it is characterised in that: step 3:
When the HV Auxiliary Transformer failure of No.1 unit malfunction No.1 unit, then Medium voltage switch or circuit breaker R (21), Medium voltage switch or circuit breaker S
(22), Medium voltage switch or circuit breaker T (23) and Medium voltage switch or circuit breaker U (24) tripping；Medium voltage switch or circuit breaker D (6), Medium voltage switch or circuit breaker E (7), Medium voltage switch or circuit breaker G (9)
With Medium voltage switch or circuit breaker H (10) automatic closing, hinder if No.1 starting accident occurs again at this time, Medium voltage switch or circuit breaker A (1) and Medium voltage switch or circuit breaker B
(2) tripping, No.1 unit is by loss of off-site power at this time, and the starting speed that becomes faster that unit is closed on by closing interconnection switch A (3) is extensive
Multiple 1 column auxiliary bus bar of No.1 unit power supply is disconnected by anti-synchronizing mode and being run on corresponding emergency bus after station service recovery
Diesel engine, alleviate the pressure of diesel engine continuous operation, the control of the state in power station and nuclear safety provided safeguard.
8. a kind of control method of nuclear power unit standby power supply device as claimed in claim 7, it is characterised in that: step 4:
When the HV Auxiliary Transformer failure of No. two units of No. two unit malfunctions, then Medium voltage switch or circuit breaker V (25), Medium voltage switch or circuit breaker W
(26), Medium voltage switch or circuit breaker X (27) and Medium voltage switch or circuit breaker Y (28) tripping；Medium voltage switch or circuit breaker M (17), Medium voltage switch or circuit breaker N (18), Medium voltage switch or circuit breaker P
(19) and Medium voltage switch or circuit breaker Q (20) automatic closing, if No. two starting accidents barriers, Medium voltage switch or circuit breaker I (11) and middle pressure occurs again at this time
Switch J (12) tripping, loss of off-site power is closed on the starting of unit by closing interconnection switch D (14) by No. two units at this time
The 1 column auxiliary bus bar of No. two units of quick-recovery that becomes faster power supply is disconnected corresponding emergency by anti-synchronizing mode after station service recovery
The diesel engine run on bus alleviates the pressure of diesel engine continuous operation, provides safeguard to the state control in power station and nuclear safety.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810961477.4A CN109066960A (en) | 2018-08-22 | 2018-08-22 | A kind of nuclear power unit standby power supply device and its control method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810961477.4A CN109066960A (en) | 2018-08-22 | 2018-08-22 | A kind of nuclear power unit standby power supply device and its control method |
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| CN109066960A true CN109066960A (en) | 2018-12-21 |
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|---|---|---|---|
| CN201810961477.4A Pending CN109066960A (en) | 2018-08-22 | 2018-08-22 | A kind of nuclear power unit standby power supply device and its control method |
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| CN111682645A (en) * | 2020-06-28 | 2020-09-18 | 江苏核电有限公司 | A kind of nuclear power station maintenance power intelligent control device and control method |
| CN113036757A (en) * | 2021-03-26 | 2021-06-25 | 中国核电工程有限公司 | Power distribution device and nuclear power equipment |
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