CN107728508A - A kind of control guard method of flexible direct current system and its control protective unit - Google Patents
A kind of control guard method of flexible direct current system and its control protective unit Download PDFInfo
- Publication number
- CN107728508A CN107728508A CN201710780454.9A CN201710780454A CN107728508A CN 107728508 A CN107728508 A CN 107728508A CN 201710780454 A CN201710780454 A CN 201710780454A CN 107728508 A CN107728508 A CN 107728508A
- Authority
- CN
- China
- Prior art keywords
- module
- direct current
- flexible direct
- current system
- feature information
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Rectifiers (AREA)
- Inverter Devices (AREA)
Abstract
Control guard method and its control protective unit the invention provides a kind of flexible direct current system; it is related to technical field of direct current power transmission; it can accurately identify the period of stopping transport whether there is the black module generation of the second class; and then ensure the safe operation of flexible direct current system, improve the availability of modular multilevel converter valve.Wherein, the control guard method of flexible direct current system includes：The period is once run preceding, detects the black module being bypassed, notes down the fisrt feature information of black module；In the period of currently stopping transport, fisrt feature information is stored；Charge period is being currently up, is detecting black module, is noting down and stores the second feature information of black module；Fisrt feature information is compared with second feature information, judges whether fisrt feature information is consistent with second feature information；If so, issue permission unlock instruction；Forbid unlock instruction if it is not, issuing.The control guard method of above-mentioned flexible direct current system is used to ensure flexible direct current system safe and stable operation.
Description
Technical field
The present invention relates to technical field of direct current power transmission, more particularly to a kind of flexible direct current system control guard method and its
Control protective unit.
Background technology
Modular multilevel converter valve is made up of multiple power models, is the hardcore of flexible direct current system.To ensure
The safe and stable operation of modular multilevel converter valve and flexible direct current system, at present generally use control protective unit, example
As valve level controller is monitored and controlled to the state of multiple power models in modular multilevel converter valve, to realize pair
Effective management of power model.
As shown in figure 1, power model 1 includes the first electronic device S1, the second electronic device S2, the first anti-paralleled diode
D1, the first anti-paralleled diode D2, capacitor C0, mechanical bypass contactor K1, bypass IGCT K2, discharge resistance R, a high position take
Can power supply P and Control card (not shown).Power model 1 and the annexation of valve level controller 2 with reference to shown in Fig. 2
Schematic diagram, valve level controller 2 is connected with each power model 1 in modular multilevel converter valve respectively by optical fiber, when soft
Property straight-flow system start when, power model 1 is started working：Capacitor C is given by not controlling charging0Charging, so as to make a high position take energy
Power supply P is the Control card power supply on place power model 1, and then makes Control card by uplink optical fibers 3 by place power mould
The status information of block 1 is sent into valve level controller 2.When valve level controller 2 is not received by Control card within a period of time
On the status information sent or when receiving the fault status information sent on Control card, valve level controller 2 by downlink optical fiber 4 to
Corresponding Control card issues bypass commands, the machinery of power model 1 where Control card controls in the presence of bypass commands
Formula bypass contactor K1Closure, makes the power model 1 out of service.
But in actual applications, due to the factor such as the faults itself of power model 1 or the failure of uplink optical fibers 3, portion can be caused
Point power model 1 can not normally on send status information, now, this kind of power model 1 is referred to as black module.Black module mainly includes the
A kind of black module, the black module of the second class and the black module three types of the 3rd class.Wherein, the black module of the first kind is in flexible direct current system
The power model being bypassed in a preceding running for system.The black module of second class is the stoppage in transit phase in flexible direct current system
Between, the power that leads to not send status information by high-order draw-out power supply P failures, Control card failure or the failure of uplink optical fibers 3
Module 1.The 3rd black module of class be flexible direct current system operation after, by high-order draw-out power supply P failures, Control card failure or on
The failure of row optical fiber 3 causes the status information sent to be interrupted, but remains to normal bypass and will not be to the safety of flexible direct current system
The power model 1 that stable operation impacts.
For the black module of the issuable first kind before flexible direct current system operation and the black module of the second class, due to the
A kind of black module reliably bypasses, thus when only existing the black module of the first kind in flexible direct current system, in flexible direct current system
System unblock operation after, the black module of the first kind will not have undesirable effect to the modular multilevel converter valve at place, enter without
Influence the safe and stable operation of flexible direct current system.But when module black in the presence of the second class in flexible direct current system, in flexibility
After straight-flow system unblock operation, the black module of the second class can cause very unfavorable shadow to the modular multilevel converter valve at place
Ring, whole modular multilevel converter valve can be caused to be damaged when serious, and then influence the safe operation of flexible direct current system.
In the prior art, in order to avoid the safe and stable operation that the black module of the second class influences flexible direct current system, when
Detected before flexible direct current system operation after black module in modular multilevel converter valve being present, can only be how electric to whole modularization
Flat converter valve carries out locking trip operation, the modular multilevel converter valve is stopped.But using this kind of method, when
When the black module of the first kind that will not be had undesirable effect to flexible direct current system is only existed in modular multilevel converter valve, also can
Locking trip operation is carried out to whole modular multilevel converter valve, what this was greatly lowered modular multilevel converter valve can
Utilization rate.
The content of the invention
Control guard method and control protective unit the invention provides a kind of flexible direct current system, can be accurately identified soft
Property straight-flow system the stoppage in transit period whether there is the black module of the second class and produce, and then on the one hand ensure that the safety of flexible direct current system is steady
Fixed operation, on the other hand improve the availability of modular multilevel converter valve in flexible direct current system.
To reach above-mentioned purpose, the present invention adopts the following technical scheme that：
The first aspect of the present invention provides a kind of control guard method of flexible direct current system, the flexible direct current system
Work period include stop transport the period, start charge period and operation the period；The control guard method of the flexible direct current system
Including：
Step S1：In the operation period in the preceding one action cycle of flexible direct current system, the more level changes of current of detection moduleization
The black module being bypassed in valve, and note down the fisrt feature information of detected black module；
Step S2：In the stoppage in transit period of the current operating cycle of the flexible direct current system, to the fisrt feature information
Stored；
Step S3：In the startup charge period of the current operating cycle of the flexible direct current system, the modularization is detected
Black module present in more level converter valves, note down and store the second feature information of detected black module；By described
One characteristic information is compared with the second feature information, judges that the fisrt feature information is with the second feature information
It is no consistent；If so, issue permission unlock instruction；Forbid unlock instruction if it is not, issuing.
In the control guard method for the flexible direct current system that the present embodiment is provided, before flexible direct current system once
The fisrt feature information that the operation period of work period is noted down is characteristic information corresponding to the black module of the first kind.When in current work
When making the startup charge period in cycle and comparing out second feature information and inconsistent fisrt feature information, illustrate in work at present week
The stoppage in transit period of phase has the black module of the second class to produce, and now forbids unlock instruction by issuing, forbids flexible direct current system to continue
Unblock operation, you can avoid safe operation of the black module of the second class to flexible direct current system from bringing harmful effect.When in current work
Make the cycle startup charge period compare out second feature information it is consistent with fisrt feature information when, illustrate in current operating cycle
The stoppage in transit period produced without the black module of the second class, can now issue permission unlock instruction, it is allowed to which flexible direct current system continues to solve
Lock operation.With detecting to change whole modular multilevel after black module in modular multilevel converter valve being present in the prior art
The method that stream valve carries out locking trip operation is compared, the control protection side of the flexible direct current system provided using the present embodiment
Method, the black module of the second class is whether there is during the stoppage in transit that flexible direct current system can be recognized accurately and is produced, on the one hand ensure that flexibility
The safe and stable operation of straight-flow system, on the other hand improve the available of modular multilevel converter valve in flexible direct current system
Rate.
The second aspect of the present invention provides a kind of control protective unit of flexible direct current system, including characteristic information identification
Module, memory module, comparing module and control module；
Wherein, the characteristic information identification module respectively with multiple power model phases in modular multilevel converter valve
Even；In the operation period in the preceding one action cycle of the flexible direct current system, the characteristic information identification module is used to detect
The black module being bypassed in the modular multilevel converter valve, and the fisrt feature information of detected black module is carried out
Record；
The memory module is connected with the characteristic information identification module；In the work at present week of the flexible direct current system
The stoppage in transit period of phase, the fisrt feature information that the memory module is used to record the characteristic information identification module are deposited
Storage；
In the startup charge period of the current operating cycle of the flexible direct current system, the characteristic information identifies mould
Block is additionally operable to detect the black module in the modular multilevel converter valve, and the second feature of detected black module is believed
Breath is noted down；The memory module is additionally operable to store the second feature information that the characteristic information identification module is noted down；
The comparing module is connected with the memory module and the control module respectively；In the flexible direct current system
The startup charge period of current operating cycle, the comparing module are used for the fisrt feature information for being stored the memory module
It is compared with second feature information, and judges whether the fisrt feature information and the second feature information are consistent；If so,
Permission unlock instruction is issued by the control module；Forbid unlock instruction if it is not, being issued by the control module.
The beneficial effect and the first aspect of the present invention of the control protective unit of flexible direct current system provided by the present invention
The beneficial effect of the control guard method of the flexible direct current system provided is identical, and here is omitted.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
The structural representation for the power model that Fig. 1 is provided by prior art；
The power model and the connection relationship diagram of valve level controller that Fig. 2 is provided by prior art；
The flow chart of the control guard method for the flexible direct current system that Fig. 3 is provided by the embodiment of the present invention one；
Current direction schematic diagram of the black module of internal fault that Fig. 4 is provided by the embodiment of the present invention one in charging process；
The structural representation one of the control protective unit for the flexible direct current system that Fig. 5 is provided by the embodiment of the present invention two；
The structural representation two of the control protective unit for the flexible direct current system that Fig. 6 is provided by the embodiment of the present invention two；
Description of reference numerals：
1- power models；2- valve level controllers；
3- uplink optical fibers；4- downlink optical fibers；
5- characteristic information identification modules；6- memory modules；
7- comparing modules；8- control modules；
9- information deletion modules；10- information add modules；
S1- the first electronic device； S2- the second electronic device；
D1- the first anti-paralleled diode； D2- the second anti-paralleled diode；
K1- mechanical bypass contactor； K2- bypass IGCT；
C0- capacitor；R- discharge resistances；
P- high position draw-out power supplies.
Embodiment
In order to facilitate the understanding of the purposes, features and advantages of the present invention, implement below in conjunction with the present invention
Accompanying drawing in example, the technical scheme in the embodiment of the present invention is clearly and completely described.Obviously, described embodiment
Only part of the embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, the common skill in this area
All other embodiment that art personnel are obtained on the premise of creative work is not made, belong to the model that the present invention protects
Enclose.
Embodiment one
As shown in figure 3, a kind of control guard method of flexible direct current system is present embodiments provided, flexible direct current system
Work period includes stop transport period, startup charge period and operation period.The control guard method of the flexible direct current system includes：
Step S1：In the operation period in the preceding one action cycle of flexible direct current system, the more level changes of current of detection moduleization
The black module being bypassed in valve, and note down the fisrt feature information of detected black module.
Step S2：In the stoppage in transit period of the current operating cycle of flexible direct current system, fisrt feature information is stored.
Step S3：In the startup charge period of the current operating cycle of flexible direct current system, the more level of detection moduleization change
Black module present in valve is flowed, notes down and stores the second feature information of detected black module；By fisrt feature information with
Second feature information is compared, and judges whether fisrt feature information is consistent with second feature information；If so, issuing allows to unlock
Instruction；Forbid unlock instruction if it is not, issuing.
It should be noted that in the actual motion of modular multilevel converter valve, due to power model faults itself or
The factors such as uplink optical fibers failure, the power model for leading to not send status information on normal is black module.The feature letter of black module
Breath is the information for referring to reflect black modular character, such as may include the positional information of black module and the number information of black module.
Accordingly, fisrt feature information specifically may include to be detected in the operation period in the preceding one action cycle of flexible direct current system
The positional information of the total number information of the black module gone out and/or each black module；Second feature information specifically may include in flexibility
The total number information for starting black module detected in charge period of the current operating cycle of straight-flow system and/or each black
The positional information of module.
Due to the black module of the first kind once to run black module caused by the period before flexible direct current system, the second class is black
Module is in black module caused by the stoppage in transit period of flexible direct current system, therefore, in the flexible direct current system that the present embodiment is provided
In the control guard method of system, the fisrt feature noted down in the operation period in the preceding one action cycle of flexible direct current system is believed
Cease for characteristic information corresponding to the black module of the first kind.When the stoppage in transit period no second of the current operating cycle of flexible direct current system
When the black module of class produces, the black module detected by startup charge period in current operating cycle only includes the black mould of the first kind
Block, the second feature information recorded also just only correspond to the characteristic information of the black module of the first kind, now fisrt feature information and the
Two characteristic informations are consistent.When the stoppage in transit period of the current operating cycle of flexible direct current system thering is the black module of the second class to produce, when
Black module detected by the startup charge period of preceding work period just includes the black module of the first kind and the black module of the second class, is remembered
The second feature information of record also should just correspond to the characteristic information of the black module of the first kind and the black module of the second class, now fisrt feature
Information and second feature information are inconsistent.
Therefore in the control guard method for the flexible direct current system that the present embodiment is provided, fisrt feature is believed
After breath and second feature information are compared, if judging, fisrt feature information and second feature information are inconsistent, illustrate to stop
The fortune period has the black module of the second class to produce, in order to avoid safe operation of the black module of the second class to flexible direct current system bring it is bad
Influence, by issuing unlock instruction can be forbidden to forbid flexible direct current system to continue unblock operation.If judge fisrt feature information
Consistent with second feature information, then explanation stoppage in transit period no black module of second class produces, now modular multilevel converter valve
In only exist the black module of the first kind, because the black module of the first kind will not bring bad shadow to the safe operation of flexible direct current system
Ring, thus by issuing unlock instruction can be allowed to run flexible direct current system normal release.With in the prior art to whole mould
The method that the more level converter valves of blockization carry out locking trip operation is compared, the flexible direct current system provided using the present embodiment
Guard method is controlled, the black module of the second class is whether there is during the stoppage in transit that flexible direct current system can be recognized accurately and is produced, on the one hand
The safe and stable operation of flexible direct current system is ensure that, on the other hand improves the modular multilevel change of current in flexible direct current system
The availability of valve, caused black module is reduced in modular multilevel converter valve to the normal startup of flexible direct current system
Influence.
, can be according to can it should be noted that when the black module in modular multilevel converter valve detects
The status information sent on power model is received as the foundation for detecting black module, when can not receive power model on the shape that send
During state information, it is black module to illustrate the power model.
Optionally, work can be made by way of being issued to operating platform and allowing unlock instruction or forbid unlock instruction
Personnel obtain corresponding information in operating platform, then perform operation, control flexible direct current system unblock via staff
Run or forbid unblock to run.It is of course also possible to being issued by the tripper directly into flexible direct current system allows to unlock
The mode of unlock instruction is instructed or forbidden, flexible direct current system unblock operation is directly controlled or forbids unblock to run.
It is understood that in the control guard method for the flexible direct current system that the present embodiment is provided, it is allowed to unlock
Instruction and permission unlock instruction are automatically generated according to the comparison result of fisrt feature information and second feature information, without logical
Cross staff and judge whether flexible direct current system allows to unlock, so, can not only reduce consumed manpower, moreover it is possible to
Avoid by the error in judgement caused by manual operation the problem of, so as to be further ensured that the safety and stability of flexible direct current system is transported
OK.
In actual applications, the black module of the second class in modular multilevel converter valve specifically may include the black module of internal fault
With the black module of outer failure.Wherein, the black module of internal fault refers to during the stoppage in transit of flexible direct current system, and an internal high position takes can electricity
The power model that source or Control card break down.The outer black module of failure refers to that during the stoppage in transit of flexible direct current system institute is right
The power model that the uplink optical fibers answered break down.
By taking the black module of internal fault as an example, because there is event in the high-order draw-out power supply or Control card in the black module of internal fault
Barrier, thus, in the startup charge period of the current operating cycle of flexible direct current system, Control card can not on send where internal fault
The status information of black module, meanwhile, Control card can not also transmit bypass commands mechanical to the black module of place internal fault
In bypass contactor, this results in the black module of internal fault and loses bypass capability.Thus, it is unlocked operation in flexible direct current system
Afterwards, the black module of internal fault will be charged due to that can not be bypassed in modular multilevel converter valve loop, and it charged
Journey is as follows：
As shown in figure 4, (bridge arm current flow direction is such as straight when bridge arm current flows to negative DC bus by positive DC bus
Shown in line), bridge arm current passes through diode D1To capacitor C0Charged；When bridge arm current is flowed to just by negative DC bus
During the dc bus of pole (bridge arm current flows to shown in dotted line), bridge arm current passes through diode D2To capacitor C0Charged.By
In the first electronic device S1With the second electronic device S2It is in blocking, therefore capacitor C0Only charge circuit discharge off
Loop, at this moment capacitor C0Voltage will quickly raise until breakdown damage, or even produce blast.
But the control guard method of the flexible direct current system provided using the present embodiment, the stoppage in transit stage can be whether there is
The black module of second class is produced and accurately identified, when identifying that there is the generation of the black module of the second class in the stoppage in transit stage, can pass through to
Operating platform, which issues, forbids unlock instruction, forbids flexible direct current system unblock operation, and then also avoid the black module of the second class
Harmful effect to flexible direct current system.
Further, when the black module present in the operation period in the preceding one action cycle for detecting flexible direct current system
When excessive, after being stored to fisrt feature information, detected all or part of black module can also be examined
Repair, such as black module is repaired or changed.After being overhauled to black module, to avoid subsequently to fisrt feature information and
Erroneous judgement is produced when second feature information is compared, it is also necessary to which the characteristic information corresponding to the black module after maintenance is special from first
Deleted in reference breath.
Corresponding, after being stored to fisrt feature information, step S2 may also include：To flexible direct current system
All or part of black module detected by the operation period in preceding one action cycle is overhauled, and by the black mould after maintenance
Characteristic information corresponding to block is deleted from the fisrt feature information stored.
Exemplary, when fisrt feature information is the total number information of black module, after being overhauled to black module, need
The total number of the black module of maintenance is deducted from fisrt feature information；When the position that fisrt feature information is each black module
During information, it is necessary to which the positional information of the black module of maintenance is deleted from fisrt feature information after being overhauled to black module.
Further,, can also be right after being stored to fisrt feature information in the stoppage in transit period of flexible direct current system
Power model in modular multilevel converter valve is checked, when finding with the presence of power model potential safety hazard, to avoid
This Partial Power module is damaged in the flexible direct current system operation period, causes the irregular operation of flexible direct current system, can
The power model that potential safety hazard be present to this part during stoppage in transit bypasses.Also, to the power of potential safety hazard be present
After module is bypassed, it is also necessary to increase to the characteristic information of the power model after bypass in fisrt feature information, to avoid
Erroneous judgement is produced when fisrt feature information and second feature information are compared the startup charge period of current operating cycle.
Corresponding, after being stored to fisrt feature information, step S2 may also include：Modular multilevel is changed
Part power model is bypassed in stream valve, and the characteristic information of the power model after bypass is increased to the first stored spy
In reference breath.
Embodiment two
Present embodiments provide a kind of control protective unit of flexible direct current system, the control protection of the flexible direct current system
Device is corresponding with the control guard method for the flexible direct current system that embodiment one is provided.
As shown in figure 5, the control protective unit for the flexible direct current system that the present embodiment provides specifically includes characteristic information knowledge
Other module 5, memory module 6, comparing module 7 and control module 8.
Wherein, characteristic information identification module 5 is connected with multiple power models 1 in modular multilevel converter valve respectively.
In the operation period in the preceding one action cycle of flexible direct current system, it is how electric that characteristic information identification module 5 is used for detection moduleization
The black module being bypassed in flat converter valve, and the fisrt feature information of detected black module is noted down.
Memory module 6 is connected with characteristic information identification module 5, in the stoppage in transit of the current operating cycle of flexible direct current system
Section, the fisrt feature information that memory module 6 is used to record characteristic information identification module 5 store.
In the startup charge period of the current operating cycle of flexible direct current system, characteristic information identification module 5 is additionally operable to examine
The black module surveyed in modular multilevel converter valve, and the second feature information of detected black module is noted down；Deposit
Storage module 6 is additionally operable to store the second feature information that characteristic information identification module 5 is noted down.
Comparing module 7 is connected with memory module 6 and control module 8 respectively；In the current operating cycle of flexible direct current system
Startup charge period, comparing module 7 is used for the fisrt feature information that is stored memory module 6 and second feature information is carried out
Compare, and judge whether fisrt feature information is consistent with second feature information；If so, being issued by control module 8 allows to unlock
Instruction；Forbid unlock instruction if it is not, being issued by control module 8.
In the control protective unit for the flexible direct current system that the present embodiment is provided, by characteristic information identification module 5,
Mutual cooperation between memory module 6, comparing module 7 and control module 8, can be to the preceding one action cycle of flexible direct current system
The operation period detected by the fisrt feature information of the black module of the first kind noted down and stored, and to flexible direct current system
The second feature information of black module detected by the startup charge period of the current operating cycle of system is noted down and stored.
After fisrt feature information and second feature information are compared, if judging, fisrt feature information and second feature information differ
Cause, then illustrate that the stoppage in transit period has the black module of the second class to produce, in order to avoid the black module of the second class is to the safety of flexible direct current system
Operation brings harmful effect, can be issued by control module 8 and forbid unlock instruction, forbids flexible direct current system to continue unblock fortune
OK.If judging, fisrt feature information is consistent with second feature information, illustrates the black module generation of period no second class of stopping transport,
The black module of the first kind is now only existed in modular multilevel converter valve, permission unlock instruction can be issued by control module 8, is made
Flexible direct current system continues unblock operation.
Compared with prior art, the control protective unit of the flexible direct current system provided using the present embodiment, Ke Yizhun
The black module of the second class is whether there is during the stoppage in transit for really identifying flexible direct current system to produce, and then on the one hand ensure that flexible direct current system
The safe and stable operation of system, on the other hand improve the availability of modular multilevel converter valve in flexible direct current system.
Further, as shown in fig. 6, the control protective unit for the flexible direct current system that the present embodiment is provided may also include
The information deletion module 9 being connected with memory module 6, information deletion module 9 are also connected with multiple power models 1 respectively, and information is deleted
Except module 9 is also connected with the memory module 6.
, can be to the operation period in preceding one action cycle in the stoppage in transit period of the current operating cycle of flexible direct current system
Detected all or part of black module is overhauled, to avoid subsequently entering fisrt feature information and second feature information
Row compare when judge by accident, information deletion module 9 can according to corresponding to the black module after maintenance characteristic information, control memory module
6 delete characteristic information corresponding to the black module after maintenance from fisrt feature information.
Exemplary, when fisrt feature information is the total number information of black module, after being overhauled to black module, letter
Memory module 6 can be controlled by total of the black module recorded according to the number information of the black module after maintenance by ceasing removing module 9
Number deducts the number of the black module after maintenance；When fisrt feature information is the positional information of each black module, to black module
After being overhauled, information deletion module 9 can be according to the positional information of the black module after maintenance, after controlling memory module 6 to overhaul
Black module positional information from fisrt feature information included by each black module positional information in delete.
Further, referring again to Fig. 6, the control protective unit for the flexible direct current system that the present embodiment is provided may be used also
Including information add module 10.Information add module 10 is connected with multiple power models 1 respectively, and information add module 10 is also with depositing
Module 6 is stored up to be connected.
, can also be to the work(in modular multilevel converter valve in the stoppage in transit period of the current operating cycle of flexible direct current system
Rate module 1 is checked, when finding to have power model 1 potential safety hazard to be present, to avoid this Partial Power module 1 flexible straight
The streaming system operation period is damaged, and causes the irregular operation of flexible direct current system, can exist during stoppage in transit to this part
The power model 1 of potential safety hazard is bypassed.During to avoid that subsequently fisrt feature information and second feature information is compared
Judge by accident, information add module 10 can control memory module 6 first according to the characteristic information of the power model 1 after bypass
The characteristic information of power model 1 in characteristic information after addition bypass.
Exemplary, when fisrt feature information is the total number information of black module, to the power of potential safety hazard be present
After module 1 is bypassed, information add module 10 can control memory module 6 according to the number information for the power model 1 being bypassed
The number for the power model 1 being bypassed is added in the total number of the black module recorded；When fisrt feature information is each
During the positional information of black module, after the power model 1 to potential safety hazard be present bypasses, information add module 10 can basis
The positional information for the power model 1 being bypassed is added to by the positional information for the power model 1 being bypassed, control memory module 6
In fisrt feature information.
The embodiment of the present invention is the foregoing is only, but protection scope of the present invention is not limited thereto, it is any
Those familiar with the art the invention discloses technical scope in, the change or replacement that can readily occur in, all should
It is included within the scope of the present invention.Therefore, protection scope of the present invention should using the scope of the claims as
It is accurate.
Claims (6)
- A kind of 1. control guard method of flexible direct current system, it is characterised in that the work period bag of the flexible direct current system Include the period of stopping transport, start charge period and operation period；The control guard method of the flexible direct current system includes：Step S1：In the operation period in the preceding one action cycle of flexible direct current system, in the more level converter valves of detection moduleization The black module being bypassed, and note down the fisrt feature information of detected black module；Step S2：In the stoppage in transit period of the current operating cycle of the flexible direct current system, the fisrt feature information is carried out Storage；Step S3：In the startup charge period of the current operating cycle of the flexible direct current system, how electric the modularization is detected Black module present in flat converter valve, note down and store the second feature information of detected black module；It is special by described first Reference breath is compared with the second feature information, judge the fisrt feature information and the second feature information whether one Cause；If so, issue permission unlock instruction；Forbid unlock instruction if it is not, issuing.
- 2. the control guard method of flexible direct current system according to claim 1, it is characterised in that the step S2 is also wrapped Include：All or part of black module detected by the operation period in the preceding one action cycle of the flexible direct current system is entered Row maintenance, and characteristic information corresponding to the black module after maintenance is deleted from the fisrt feature information stored.
- 3. the control guard method of flexible direct current system according to claim 1, it is characterised in that the step S2 is also wrapped Include：The part power model in the modular multilevel converter valve is bypassed, and by the power model after bypass Characteristic information is increased in stored fisrt feature information.
- 4. a kind of control protective unit of flexible direct current system, it is characterised in that including characteristic information identification module, storage mould Block, comparing module and control module；Wherein, the characteristic information identification module is connected with multiple power models in modular multilevel converter valve respectively； The operation period in the preceding one action cycle of the flexible direct current system, the characteristic information identification module are used to detect the mould The black module being bypassed in the more level converter valves of blockization, and the fisrt feature information of detected black module is noted down；The memory module is connected with the characteristic information identification module；In the current operating cycle of the flexible direct current system Stop transport the period, the fisrt feature information that the memory module is used to record the characteristic information identification module stores；In the startup charge period of the current operating cycle of the flexible direct current system, the characteristic information identification module is also Enter for detecting the black module in the modular multilevel converter valve, and by the second feature information of detected black module Row record；The memory module is additionally operable to store the second feature information that the characteristic information identification module is noted down；The comparing module is connected with the memory module and the control module respectively；In the current of the flexible direct current system The startup charge period of work period, the comparing module are used for the fisrt feature information that is stored the memory module and the Two characteristic informations are compared, and judge whether the fisrt feature information and the second feature information are consistent；If so, pass through The control module issues permission unlock instruction；Forbid unlock instruction if it is not, being issued by the control module.
- 5. the control protective unit of flexible direct current system according to claim 4, it is characterised in that also including information deletion Module, described information removing module are connected with multiple power models respectively, described information removing module also with the storage Module is connected；In the stoppage in transit period of the current operating cycle of the flexible direct current system, during operation to the preceding one action cycle After all or part of black module detected by section is overhauled, described information removing module is used to control the memory module Characteristic information corresponding to the black module after maintenance is deleted from the fisrt feature information.
- 6. the control protective unit of flexible direct current system according to claim 4, it is characterised in that also added including information Module, described information add module are connected with multiple power models respectively, described information add module also with the storage Module is connected；In the stoppage in transit period of the current operating cycle of the flexible direct current system, to the modular multilevel converter valve In Partial Power module bypassed after, described information add module be used for control the memory module in the fisrt feature The characteristic information of power model in information after addition bypass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710780454.9A CN107728508B (en) | 2017-09-01 | 2017-09-01 | A kind of control guard method of flexible direct current system and its control protective unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710780454.9A CN107728508B (en) | 2017-09-01 | 2017-09-01 | A kind of control guard method of flexible direct current system and its control protective unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107728508A true CN107728508A (en) | 2018-02-23 |
| CN107728508B CN107728508B (en) | 2019-11-01 |
Family
ID=61205462
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710780454.9A Active CN107728508B (en) | 2017-09-01 | 2017-09-01 | A kind of control guard method of flexible direct current system and its control protective unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107728508B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110635675A (en) * | 2019-10-30 | 2019-12-31 | 特变电工西安柔性输配电有限公司 | Flexible direct-current transmission converter valve starting method based on black module detection |
| CN110994558A (en) * | 2019-12-04 | 2020-04-10 | 南京南瑞继保电气有限公司 | Black module judgment processing method and device |
| CN111638419A (en) * | 2020-07-07 | 2020-09-08 | 南方电网科学研究院有限责任公司 | Flexible direct-current black module test method and device |
| WO2021151469A1 (en) * | 2020-01-28 | 2021-08-05 | Siemens Aktiengesellschaft | Method for operating a modular multilevel converter, and modular multilevel converter |
| CN113904573A (en) * | 2021-10-13 | 2022-01-07 | 山东大学 | Half-bridge improved MMC sub-module topological structure and control method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102299506A (en) * | 2011-08-24 | 2011-12-28 | 中国电力科学研究院 | Protection system and method thereof for modular multi-level converter |
| CN102983568A (en) * | 2012-11-12 | 2013-03-20 | 华北电力大学 | Modular multilevel converter high voltage direct current (MMC-HVDC) converter station starting method used for power network black start |
| EP2602927A3 (en) * | 2011-12-07 | 2014-08-06 | Hitachi Ltd. | Modular multilevel converter with DC fault protection |
| CN104242250A (en) * | 2014-10-14 | 2014-12-24 | 国家电网公司 | Modular multilevel converter relay protection method and system |
| CN105680681A (en) * | 2016-02-16 | 2016-06-15 | 南方电网科学研究院有限责任公司 | Clamping type single sub-module-based starting method for modular multilevel converter |
| CN105846704A (en) * | 2016-05-17 | 2016-08-10 | 中国能源建设集团广东省电力设计研究院有限公司 | Power module, converter, charging method thereof and direct current fault self-cleaning method |
| CN107086605A (en) * | 2017-06-12 | 2017-08-22 | 南方电网科学研究院有限责任公司 | A kind of black-start method of power network stepping up from zero |
-
2017
- 2017-09-01 CN CN201710780454.9A patent/CN107728508B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102299506A (en) * | 2011-08-24 | 2011-12-28 | 中国电力科学研究院 | Protection system and method thereof for modular multi-level converter |
| EP2602927A3 (en) * | 2011-12-07 | 2014-08-06 | Hitachi Ltd. | Modular multilevel converter with DC fault protection |
| CN102983568A (en) * | 2012-11-12 | 2013-03-20 | 华北电力大学 | Modular multilevel converter high voltage direct current (MMC-HVDC) converter station starting method used for power network black start |
| CN104242250A (en) * | 2014-10-14 | 2014-12-24 | 国家电网公司 | Modular multilevel converter relay protection method and system |
| CN105680681A (en) * | 2016-02-16 | 2016-06-15 | 南方电网科学研究院有限责任公司 | Clamping type single sub-module-based starting method for modular multilevel converter |
| CN105846704A (en) * | 2016-05-17 | 2016-08-10 | 中国能源建设集团广东省电力设计研究院有限公司 | Power module, converter, charging method thereof and direct current fault self-cleaning method |
| CN107086605A (en) * | 2017-06-12 | 2017-08-22 | 南方电网科学研究院有限责任公司 | A kind of black-start method of power network stepping up from zero |
Non-Patent Citations (1)
| Title |
|---|
| 李笑倩等: "基于半压钳位子模块的MMC直流短路故障穿越研究", 《电源学报》 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110635675A (en) * | 2019-10-30 | 2019-12-31 | 特变电工西安柔性输配电有限公司 | Flexible direct-current transmission converter valve starting method based on black module detection |
| CN110635675B (en) * | 2019-10-30 | 2021-04-27 | 特变电工西安柔性输配电有限公司 | Flexible direct-current transmission converter valve starting method based on black module detection |
| CN110994558A (en) * | 2019-12-04 | 2020-04-10 | 南京南瑞继保电气有限公司 | Black module judgment processing method and device |
| CN110994558B (en) * | 2019-12-04 | 2022-03-29 | 南京南瑞继保电气有限公司 | Black module judgment processing method and device |
| WO2021151469A1 (en) * | 2020-01-28 | 2021-08-05 | Siemens Aktiengesellschaft | Method for operating a modular multilevel converter, and modular multilevel converter |
| CN111638419A (en) * | 2020-07-07 | 2020-09-08 | 南方电网科学研究院有限责任公司 | Flexible direct-current black module test method and device |
| CN111638419B (en) * | 2020-07-07 | 2022-09-13 | 南方电网科学研究院有限责任公司 | Flexible direct-current black module test method and device |
| CN113904573A (en) * | 2021-10-13 | 2022-01-07 | 山东大学 | Half-bridge improved MMC sub-module topological structure and control method thereof |
| CN113904573B (en) * | 2021-10-13 | 2023-10-27 | 山东大学 | Half-bridge improved MMC submodule topological structure and control method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107728508B (en) | 2019-11-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107728508B (en) | A kind of control guard method of flexible direct current system and its control protective unit | |
| CN111129623B (en) | Vehicle-mounted storage battery charging protection method and system | |
| CN206211665U (en) | A kind of straight-flow system | |
| CN105291875B (en) | A kind of electric vehicle rapid charging method | |
| CN111707924B (en) | Flexible direct current converter valve on-site test fault diagnosis system and method | |
| CN109552104A (en) | A kind of charge control method, device, equipment, medium and charging pile | |
| CN110395140A (en) | Electric car charging diagnostic method, system and charging pile | |
| CN106849016A (en) | A kind of guard method of MMC sub-module faults and device | |
| CN106571688A (en) | Method for monitoring operation mode of direct-current system and operation states of disconnecting switches | |
| CN104333293A (en) | Electric car motor controller | |
| CN205665378U (en) | Relay adhesion detection circuitry | |
| CN108773281A (en) | A kind of electromobile charging management control method | |
| CN110794293A (en) | Method for detecting automatic nuclear capacity switch state of storage battery | |
| CN110492600A (en) | Substation's novel intelligent DC power system and maintaining method | |
| CN104340146B (en) | A kind of track traffic backup power system | |
| CN113276720A (en) | BMS message monitoring-based electric vehicle safe charging system and method | |
| CN105109429A (en) | Power supply management method based on vehicle-mounted wireless terminal | |
| CN109119964A (en) | Prevent the intelligent controller of switch trip coil burnout | |
| CN101976865A (en) | Electric automobile charge pile system with error plug preventing function and error plug preventing method thereof | |
| CN105427911A (en) | Control method and control system of PWR nuclear power plant power switching test | |
| CN113022364B (en) | Tramcar charging control method | |
| CN103523030B (en) | The control setup of HSCB automatic re-operation under subway train VVVF fault work condition and method | |
| CN206884772U (en) | Charging socket electronic lock performance testing device and security protection and control device | |
| CN114934722B (en) | Control method and terminal for preventing abnormal locking of charging gun | |
| CN207579613U (en) | The self-checking system of charging equipment of electric automobile |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210604 Address after: 510700 3rd, 4th and 5th floors of building J1 and 3rd floor of building J3, No.11 Kexiang Road, Science City, Luogang District, Guangzhou City, Guangdong Province Patentee after: China Southern Power Grid Research Institute Co.,Ltd. Address before: 510663 1-2 / F, building J3, No.11 Kexiang Road, Science City, Luogang District, Guangzhou City, Guangdong Province Patentee before: CSG POWER GRID TECHNOLOGY RESEARCH CENTER |