CN106207990A - Rapid protection device and protection method of flexible direct current system - Google Patents
Rapid protection device and protection method of flexible direct current system Download PDFInfo
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- CN106207990A CN106207990A CN201610547838.1A CN201610547838A CN106207990A CN 106207990 A CN106207990 A CN 106207990A CN 201610547838 A CN201610547838 A CN 201610547838A CN 106207990 A CN106207990 A CN 106207990A
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000013307 optical fiber Substances 0.000 claims abstract description 80
- 230000005540 biological transmission Effects 0.000 claims abstract description 21
- 238000003491 array Methods 0.000 claims abstract description 17
- 230000009471 action Effects 0.000 claims description 29
- 230000004069 differentiation Effects 0.000 claims description 19
- 230000001681 protective effect Effects 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000002955 isolation Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 description 5
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- 230000005611 electricity Effects 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/268—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured for dc systems
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- Direct Current Feeding And Distribution (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
A fast protection device and a protection method of a flexible direct current system are disclosed, the fast protection device comprises two field programmable gate arrays, two data acquisition modules and an optical fiber interface plug-in; the data acquisition module acquires data through an ADC (analog to digital converter) or an optical fiber and respectively transmits the data to the two field programmable gate arrays; the two field programmable gate arrays carry out logic discrimination of rapid protection and transmit discrimination results to the optical fiber interface plug-in unit through an internal bus; the optical fiber interface plug-in unit comprehensively judges the judgment results of the two field programmable gate arrays and then transmits the protected outlet command to the converter control unit or the direct current breaker through the optical fiber. The invention can be widely applied to the field of flexible direct current transmission.
Description
Technical field
The present invention relates to flexible direct current system (flexible direct current system described herein include flexible direct current power transmission system and
Flexible direct current distribution system) rapid protecting device and implementation method, belong to flexible DC power transmission/power distribution network and equipment and technology neck
Territory.
Background technology
The protection system of flexible direct current power transmission system, its main task is the operation peace of protection flexible direct current converter
Entirely, isolated fault quick, reliable, reduces converter and is risk of damage to.Along with the capacity of flexible direct current power transmission system needs
Ask constantly expansion, major loop framework capacity based on modular multilevel (MMC) method flexible direct current inverter and electric pressure
More and more higher.After the capacity of flexible direct current inverter and electric pressure improve so that the internal events such as inverter short circuit are occurring
After barrier, the rising of fault current is very fast (every microsecond fault current can increase several amperes), then event after fault generation one millisecond
Barrier electric current will increase to a few kiloampere；Meanwhile, the conveyance capacity of flexible direct current converter is relatively low.So fault occurs
Afterwards serious threat is arrived to the safety of converter, needed flexible direct current protection device to determine fault within the time of hundred microseconds
And send the instruction of isolated fault.
Quickly protect about flexible DC power transmission at present both at home and abroad and the research of through engineering approaches application be also in the starting stage,
Practical application engineering example is less.Its research emphasis is that flexible direct current power transmission system protection zone divides and defencive function configuration side
Face, primary study is not done in the realization to quickly protection.Inverter differential protection, DC differential protection, the low stream etc. that presses through quickly are protected
Protect rapidity, reliability is related to safety and the reliability service of flexible DC power transmission net of converter.
Summary of the invention
For problem above, the invention aims to provide the rapid protecting device of a kind of flexible direct current power transmission system
And implementation method.The application gives full play to high speed data processing and the logic processing capability of FPGA (field programmable gate array),
Carry out high-speed sampling and quick relay protective scheme processes；Two processing unit action messages are comprehensively sentenced by optical fiber interface plug-in unit
Not, can effectively prevent the malfunction that discrete component fault causes, improve the reliability of system；Optical fiber interface plug-in unit is by optical fiber
Mode carries out communication with inverter unit or dc circuit breaker, can improve the speed of flexible direct current system isolated fault further
Degree.
To achieve these goals, can reach by adopting the following technical scheme that:
A kind of rapid protecting device of flexible direct current system, it is characterised in that:
Described rapid protecting device include two set redundancies arrange hardware module, two set redundancies arrange hardware module for
Same protection equipment independently carries out relay protective scheme judgement, and the comprehensive two-part judged result of rapid protecting device generates final
The protection converter Control unit that is handed down in flexible direct current power transmission system of instruction or dc circuit breaker.
The rapid protecting device of described flexible direct current system, including the first data acquisition module, the second data acquisition module,
Primary scene programmable gate array FPGA, secondary scene programmable gate array FPGA and optical fiber interface plug-in unit；Its feature exists:
The outfan of described first data acquisition module is connected with the input of primary scene programmable gate array FPGA；
The outfan of described second data acquisition module is connected with the input of secondary scene programmable gate array FPGA；
Described optical fiber interface plug-in unit by internal data bus respectively with primary scene programmable gate array FPGA, second existing
The outfan of field programmable gate array FPGA is connected；
Primary scene programmable gate array FPGA, that secondary scene programmable gate array FPGA is respectively configured brachium pontis reactor is poor
Dynamic protection element, brachium pontis differential protection element, DC low-voltage overflow protecting element；
Described first data acquisition module and the second data acquisition module each independent acquisition DC system protection data, and
It is uploaded to primary scene programmable gate array FPGA and secondary scene programmable gate array FPGA, wherein, the guarantor gathered respectively
Protect data be respectively on converter valve side three-phase current, inverter under brachium pontis three-phase current, inverter brachium pontis three-phase current and
DC bus current and voltage；
Primary scene programmable gate array FPGA and secondary scene programmable gate array FPGA are based on the protection number received
According to carrying out converter bridge arm reactor differential protection, converter bridge arm differential protection, the logic of DC low-voltage overcurrent protection respectively
Computing, this protection element movement when logic operation result meets set protection element movement threshold value, programmable gate array
FPGA sends the action exit instruction of corresponding protection element and i.e. protects differentiation result, and this protection differentiation result is uploaded to optical fiber
Interface card；
The differentiation result of described two field programmable gate arrays of optical fiber interface plug-in unit carries out comprehensive distinguishing, then passes through light
The fine converter Control unit that the outlet order of protection is handed down in flexible direct current power transmission system or dc circuit breaker.
The present invention still further comprises following preferred version:
Described first data acquisition module and the second data acquisition module are by analog-to-digital conversion module ADC or same by optical fiber
Step gathers on converter valve side three-phase current, inverter brachium pontis three-phase current, dc bus electricity under brachium pontis three-phase current, inverter
Stream and voltage signal.
When described rapid protecting device is in HVDC transmission system, described optical fiber interface plug-in unit is for the first He
The protection that secondary scene programmable gate array FPGA is uploaded differentiates that result uses " with door " outlet mode, and the most only two able to programme
After protection element movement identical in logic gate array, action outlet order just is passed to change by optical fiber interface plug-in unit by optical fiber
Stream device control unit or dc circuit breaker；
When described rapid protecting device is in the DC distribution net system, described optical fiber interface plug-in unit is for first and the
The protection that two on-site programmable gate array FPGAs are uploaded differentiates that result uses disjunction gate outlet mode, i.e. two programmable gates
In array after any one protection element movement, action outlet order is just passed to inverter by optical fiber by optical fiber interface plug-in unit
Control unit or dc circuit breaker.
Disclosed herein as well is a kind of flexible direct current system guard method based on aforementioned rapid protecting device, its feature exists
In, said method comprising the steps of:
Step 1: the first data acquisition module and the second data acquisition module gather simultaneously the electric current in flexible direct current system,
Information of voltage, and be uploaded to respectively in primary scene programmable gate array FPGA, secondary scene programmable gate array FPGA；
Step 2: first, second programmable logic array FPGA according to the converter valve side three-phase current each received and
On inverter, under brachium pontis three-phase current, inverter, brachium pontis three-phase current data judge the difference stream of brachium pontis reactor differential protection respectively
Whether more than the brachium pontis reactor difference current threshold value set, if greater than then brachium pontis reactor differential protection element movement, can
Protection is differentiated that result i.e. brachium pontis reactor differential protection element movement exit instruction is by internal number by programmed logic array (PLA) FPGA
It is uploaded to optical fiber interface plug-in unit according to bus；
Step 3: first, second programmable logic array FPGA according to brachium pontis three-phase current on the inverter each received,
Under inverter, brachium pontis three-phase current and DC bus current data judge that whether the difference stream of brachium pontis differential protection is more than setting respectively
Fixed brachium pontis difference current threshold value；If greater than then brachium pontis differential protection element movement, corresponding programmable logic array FPGA
By internal data bus, protection differentiation result i.e. brachium pontis differential protection element movement exit instruction is uploaded to optical fiber interface insert
Part；
Step 4: first, second programmable logic array FPGA is according to each receiving DC bus-bar voltage, dc bus electricity
Flow data judges whether DC low-voltage and overcurrent occur；If there is then DC low-voltage overflow protecting element action, accordingly
Programmable logic array FPGA by protection differentiate result i.e. DC low-voltage overflow protecting element action exit instruction by inside
Data/address bus is uploaded to optical fiber interface plug-in unit；
Step 5: described optical fiber interface plug-in unit passes through internal bus data receiver the first or second programmable logic array
The protection that FPGA uploads differentiates each protection element movement exit instruction that result i.e. programmable logic array FPGA calculates respectively；
Step 6: optical fiber interface plug-in unit judges to use " with door " outlet mode or disjunction gate outlet mode, when using " with
Door " outlet mode time, enter step 7；When using disjunction gate outlet mode, enter step 8；
Step 7: when only having protection element movement identical in the first and second programmable logic array FPGA, optical fiber interface
Plug-in unit just opens the action exit instruction of rapid protecting device and enters step 9, otherwise the action outlet of locking rapid protecting device
Instruction returns step 1；
Step 8: arbitrary protection element movement in the first and second programmable logic array FPGA, optical fiber interface plug-in unit is all opened
The action exit instruction putting rapid protecting device enters step 9, otherwise returns step 1；
Step 9: the action exit instruction of rapid protecting device is passed to inverter control by optical fiber by optical fiber interface plug-in unit
Unit processed or dc circuit breaker, converter Control unit or dc circuit breaker realize the stoppage in transit of straight-flow system and the isolation of fault.
The application has a following prominent beneficial effect:
1, use the combination of data acquisition module+FPGA field programmable gate array, make full use of the high-speed parallel of FPGA
Disposal ability, substantially increases data sample rates and relay protective scheme processing speed, realizes quick relay protective scheme the most easily
Process.2, use logic discrimination that two field programmable gate arrays quickly protect and differentiation result is passed through internal bus
It is sent to optical fiber interface plug-in unit；At optical fiber interface plug-in unit, the differentiation result of two field programmable gate arrays is comprehensively sentenced
Not.When in HVDC transmission system, in order to ensure the reliability of protection act, can be to two on optical fiber interface plug-in unit
The differentiation result of individual field programmable gate array carries out AND gate process；When in flexible direct current distribution network system, can be
On optical fiber interface plug-in unit, the differentiation result to two field programmable gate arrays carries out OR-gate process.3, optical fiber interface is used to insert
Part is controlled issuing and the collection of equipment state of order with MMC control unit and dc circuit breaker, is conducive to flexible straight
The extension of stream transmission system, reliability and extensibility are higher.
Accompanying drawing explanation
Fig. 1 is the structural representation of the rapid protecting device of the application flexible direct current system；
Fig. 2 is a framework and the analog quantity point layout schematic diagram of flexible direct current power transmission system；
Fig. 3 is the application flexible direct current system fast protection method schematic flow sheet.
Detailed description of the invention
Below in conjunction with Figure of description, the technical scheme of the application is described in further detail.
The rapid protecting device of flexible direct current system disclosed in the present application includes two field programmable gate arrays, two numbers
According to acquisition module, an optical fiber interface plug-in unit；First data acquisition is carried out by described data acquisition module by ADC or optical fiber,
And the data collected are delivered separately to two field programmable gate arrays；Secondly two field programmable gate arrays are carried out soon
The logic discrimination of speed protection, and differentiation result is sent to optical fiber interface plug-in unit by internal bus；Last optical fiber interface plug-in unit
The differentiation result of two field programmable gate arrays is carried out comprehensive distinguishing, passes to change by the outlet order of protection by optical fiber
Stream device control unit or dc circuit breaker.The most above-mentioned quick protection includes but not limited to that brachium pontis reactor protection, brachium pontis are differential
Protection, DC low-voltage overcurrent protection etc..
Referring specifically to accompanying drawing 1, the rapid protecting device of described flexible direct current system include the first data acquisition module, second
Data acquisition module, primary scene programmable gate array FPGA, secondary scene programmable gate array FPGA and optical fiber interface plug-in unit.
The outfan of described first data acquisition module is connected with the input of primary scene programmable gate array FPGA；Described second number
It is connected with the input of secondary scene programmable gate array FPGA according to the outfan of acquisition module；Described optical fiber interface plug-in unit passes through
Internal data bus respectively with primary scene programmable gate array FPGA, the outfan phase of secondary scene programmable gate array FPGA
Even；Primary scene programmable gate array FPGA, secondary scene programmable gate array FPGA are respectively configured the differential guarantor of brachium pontis reactor
Protection element, brachium pontis differential protection element, DC low-voltage overflow protecting element；Described first data acquisition module and the second data acquisition
Collection module each independent acquisition DC system protection data, and it is uploaded to primary scene programmable gate array FPGA and second respectively
On-site programmable gate array FPGA, wherein, the protection data gathered are respectively bridge on converter valve side three-phase current, inverter
Brachium pontis three-phase current and DC bus current and voltage (seeing shown in accompanying drawing 2) under arm three-phase current, inverter.
Primary scene programmable gate array FPGA and secondary scene programmable gate array FPGA are based on the protection number received
According to carrying out converter bridge arm reactor differential protection, converter bridge arm differential protection, the logic of DC low-voltage overcurrent protection respectively
Computing, this protection element movement when logic operation result meets set protection element movement threshold value, programmable gate array
FPGA sends the action exit instruction of corresponding protection element and i.e. protects differentiation result, and this protection differentiation result is uploaded to optical fiber
Interface card；The differentiation result of described two field programmable gate arrays of optical fiber interface plug-in unit carries out comprehensive distinguishing, then passes through
The converter Control unit or dc circuit breaker being handed down in flexible direct current power transmission system is ordered in the outlet of protection by optical fiber.
See accompanying drawing 2, the first data acquisition module and the second data acquisition module by analog-to-digital conversion module ADC or to pass through
Brachium pontis three-phase current, direct current under brachium pontis three-phase current, inverter on optical fiber synchronous acquisition converter valve side three-phase current, inverter
Bus current and voltage signal.When described rapid protecting device is in HVDC transmission system, described optical fiber interface is inserted
For the protection that the first and second on-site programmable gate array FPGAs are uploaded, part differentiates that result uses " with door " outlet mode, i.e. only
After having protection element movement identical in two programmable gate arrays, action is just exported order by optical fiber interface plug-in unit to be passed through
Optical fiber passes to converter Control unit or dc circuit breaker；When described rapid protecting device is in DC distribution net system
Time, for the protection that the first and second on-site programmable gate array FPGAs are uploaded, described optical fiber interface plug-in unit differentiates that result uses
Disjunction gate outlet mode, in i.e. two programmable gate arrays after any one protection element movement, optical fiber interface plug-in unit is just
Action outlet order is passed to converter Control unit or dc circuit breaker by optical fiber.
With reference to Fig. 3, present invention also provides the fast of a kind of flexible direct current power transmission system based on aforementioned rapid protecting device
Speed guard method, including:
Step 1: the first data acquisition module and the second data acquisition module gather each in flexible direct current system simultaneously
Electric current on transformer, information of voltage, then carry out synchronization process to sampled data.And the sampled data after synchronizing passes to
In the programmable logic array FPGA being attached thereto；
Step 2: first, second programmable logic array FPGA according to the converter valve side three-phase current each received and
On inverter, under brachium pontis three-phase current, inverter, brachium pontis three-phase current data calculate the difference stream of brachium pontis reactor differential protection, and
Judge whether difference stream is more than the brachium pontis reactor difference current threshold value set, if greater than then brachium pontis reactor differential protection element
Action, the protection differentiation i.e. brachium pontis reactor differential protection element movement exit instruction of result is passed through by programmable logic array FPGA
Internal data bus is uploaded to optical fiber interface plug-in unit；；
Step 3: first, second programmable logic array FPGA according to brachium pontis three-phase current on the inverter each received,
Under inverter, brachium pontis three-phase current and DC bus current data calculate the difference stream of brachium pontis differential protection, and judge that brachium pontis is differential
Whether the difference stream of protection is more than the brachium pontis difference current threshold value set；If greater than then brachium pontis differential protection element movement, accordingly
Programmable logic array FPGA by protection differentiation the i.e. brachium pontis differential protection element movement exit instruction of result pass through internal data
Bus is uploaded to optical fiber interface plug-in unit；
Step 4: first, second programmable logic array FPGA is according to each receiving DC bus-bar voltage, dc bus electricity
Flow data judges whether DC low-voltage and overcurrent occur；If there is then DC low-voltage overflow protecting element action, accordingly
Programmable logic array FPGA by protection differentiate result i.e. DC low-voltage overflow protecting element action exit instruction by inside
Data/address bus is uploaded to optical fiber interface plug-in unit；；
Step 5: described optical fiber interface plug-in unit passes through internal bus data receiver the first or second programmable logic array
The protection that FPGA uploads differentiates each protection element movement exit instruction that result i.e. programmable logic array FPGA calculates respectively；
Step 6: optical fiber interface plug-in unit judges to use " with door " outlet mode or disjunction gate outlet mode, when using " with
Door " outlet mode time, enter step 7；When using disjunction gate outlet mode, enter step 8；
Step 7: when only having protection element movement identical in the first and second programmable logic array FPGA, optical fiber interface
Plug-in unit just opens the action exit instruction of rapid protecting device and enters step 9, otherwise the action outlet of locking rapid protecting device
Instruction returns step 1；
Step 8: arbitrary protection element movement in the first and second programmable logic array FPGA, optical fiber interface plug-in unit is all opened
The action exit instruction putting rapid protecting device enters step 9, otherwise returns step 1；
Step 9: the action exit instruction of rapid protecting device is passed to inverter control by optical fiber by optical fiber interface plug-in unit
Unit processed or dc circuit breaker, converter Control unit or dc circuit breaker realize the stoppage in transit of straight-flow system and the isolation of fault.
The various embodiments described above are merely to illustrate the implementation of the application, and connection and topology between each parts are all permissible
It is varied from, all improvement connection and the topology of individual part carried out according to the know-why of the application and equivalents,
The most should not get rid of outside the protection domain of the application.
Claims (5)
1. the rapid protecting device of a flexible direct current system, it is characterised in that:
Described rapid protecting device includes the hardware module that two set redundancies are arranged, and the hardware module that two set redundancies are arranged is for same
Protection equipment independently carries out relay protective scheme judgement, and the comprehensive two-part judged result of rapid protecting device generates final guarantor
Finger shield makes the converter Control unit or dc circuit breaker being handed down in flexible direct current power transmission system.
2. a rapid protecting device for flexible direct current system, including the first data acquisition module, the second data acquisition module,
One on-site programmable gate array FPGA, secondary scene programmable gate array FPGA and optical fiber interface plug-in unit；Its feature exists:
The outfan of described first data acquisition module is connected with the input of primary scene programmable gate array FPGA；
The outfan of described second data acquisition module is connected with the input of secondary scene programmable gate array FPGA；
Described optical fiber interface plug-in unit passes through internal data bus respectively with primary scene programmable gate array FPGA, the secondary scene can
The outfan of programming gate array FPGA is connected；
Primary scene programmable gate array FPGA, secondary scene programmable gate array FPGA are respectively configured the differential guarantor of brachium pontis reactor
Protection element, brachium pontis differential protection element, DC low-voltage overflow protecting element；
Described first data acquisition module and the second data acquisition module each independent acquisition DC system protection data, and respectively
It is uploaded to primary scene programmable gate array FPGA and secondary scene programmable gate array FPGA, wherein, the protection number gathered
According to brachium pontis three-phase current and direct current under brachium pontis three-phase current, inverter on respectively converter valve side three-phase current, inverter
Bus current and voltage；
Primary scene programmable gate array FPGA and secondary scene programmable gate array FPGA divide based on the protection data received
Do not carry out converter bridge arm reactor differential protection, converter bridge arm differential protection, the logical operations of DC low-voltage overcurrent protection,
This protection element movement when logic operation result meets set protection element movement threshold value, programmable gate array FPGA sends
The action exit instruction of corresponding protection element i.e. protects differentiation result, and this protection differentiating, result is uploaded to optical fiber interface and inserts
Part；
The differentiation result of described two field programmable gate arrays of optical fiber interface plug-in unit carries out comprehensive distinguishing, and then passing through optical fiber will
The converter Control unit or dc circuit breaker being handed down in flexible direct current power transmission system is ordered in the outlet of protection.
The rapid protecting device of flexible direct current system the most according to claim 2, it is characterised in that:
Described first data acquisition module and the second data acquisition module synchronize to adopt by analog-to-digital conversion module ADC or by optical fiber
Brachium pontis three-phase current under brachium pontis three-phase current, inverter on collection converter valve side three-phase current, inverter, DC bus current and
Voltage signal.
The rapid protecting device of flexible direct current system the most according to claim 3, it is characterised in that:
When described rapid protecting device is in HVDC transmission system, described optical fiber interface plug-in unit is for first and second
The protection that on-site programmable gate array FPGA is uploaded differentiates that result uses " with door " outlet mode, the most only two FPGAs
After protection element movement identical in gate array, action outlet order is just passed to inverter by optical fiber by optical fiber interface plug-in unit
Control unit or dc circuit breaker；
When described rapid protecting device is in DC distribution net system, described optical fiber interface plug-in unit is existing for first and second
The protection that field programmable gate array FPGA uploads differentiates that result uses disjunction gate outlet mode, i.e. two programmable gate arrays
In any one protection element movement after, optical fiber interface plug-in unit just by action outlet order pass to converter Control by optical fiber
Unit or dc circuit breaker.
5. a flexible direct current system protection side based on the rapid protecting device described in claim 1-4 any one claim
Method, it is characterised in that said method comprising the steps of:
Step 1: the first data acquisition module and the second data acquisition module gather the electric current in flexible direct current system, voltage simultaneously
Information, and be uploaded to respectively in primary scene programmable gate array FPGA, secondary scene programmable gate array FPGA；
Step 2: first, second programmable logic array FPGA is according to the converter valve side three-phase current each received and the change of current
On device, under brachium pontis three-phase current, inverter, brachium pontis three-phase current data judge whether the difference of brachium pontis reactor differential protection flows respectively
More than the brachium pontis reactor difference current threshold value set, if greater than then brachium pontis reactor differential protection element movement, able to programme
Protection is differentiated that result i.e. brachium pontis reactor differential protection element movement exit instruction is total by internal data by logic array FPGA
Line is uploaded to optical fiber interface plug-in unit；
Step 3: first, second programmable logic array FPGA is according to brachium pontis three-phase current, the change of current on the inverter each received
Under device, brachium pontis three-phase current and DC bus current data judge that whether the difference stream of brachium pontis differential protection is more than setting respectively
Brachium pontis difference current threshold value；If greater than then brachium pontis differential protection element movement, corresponding programmable logic array FPGA will protect
Protect the differentiation i.e. brachium pontis differential protection element movement exit instruction of result and be uploaded to optical fiber interface plug-in unit by internal data bus；
Step 4: first, second programmable logic array FPGA is according to each receiving DC bus-bar voltage, DC bus current number
It is judged that whether DC low-voltage and overcurrent occur；If there is then DC low-voltage overflow protecting element action, accordingly may be used
The protection differentiation i.e. DC low-voltage overflow protecting element action exit instruction of result is passed through internal data by programmed logic array (PLA) FPGA
Bus is uploaded to optical fiber interface plug-in unit；
Step 5: described optical fiber interface plug-in unit is by internal bus data receiver the first or second programmable logic array FPGA
The protection passed differentiates each protection element movement exit instruction that result i.e. programmable logic array FPGA calculates respectively；
Step 6: optical fiber interface plug-in unit judges to use " with door " outlet mode or disjunction gate outlet mode, goes out when using " with door "
During mouth mode, enter step 8；When using disjunction gate outlet mode, enter step 9；
Step 7: when only having protection element movement identical in the first and second programmable logic array FPGA, optical fiber interface plug-in unit
The action exit instruction just opening rapid protecting device enters step 9, otherwise the action exit instruction of locking rapid protecting device
Return step 1；
Step 8: arbitrary protection element movement in the first and second programmable logic array FPGA, optical fiber interface plug-in unit is all open fast
The action exit instruction of speed protection device enters step 9, otherwise returns step 1；
Step 9: the action exit instruction of rapid protecting device is passed to converter Control list by optical fiber by optical fiber interface plug-in unit
Unit or dc circuit breaker, converter Control unit or dc circuit breaker realize the stoppage in transit of straight-flow system and the isolation of fault.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107453386A (en) * | 2017-08-24 | 2017-12-08 | 中国南方电网有限责任公司 | Power transmission control method and flexible DC power transmission device |
| CN107732884A (en) * | 2017-11-29 | 2018-02-23 | 许继集团有限公司 | A kind of track traffic trailer system DC feeder protection device |
| CN108255106A (en) * | 2018-01-18 | 2018-07-06 | 南方电网科学研究院有限责任公司 | High-speed communication centralized control unit and method for secondary equipment of high-voltage direct-current circuit breaker |
| CN108646166A (en) * | 2018-04-12 | 2018-10-12 | 广东电网有限责任公司 | A kind of flexible direct current starting-up later time differential protection test method based on phase compensation |
| CN109004630A (en) * | 2018-07-27 | 2018-12-14 | 国网江苏省电力有限公司苏州供电分公司 | A kind of flexible direct current power distribution network integrated protection system |
| CN110850154A (en) * | 2019-11-11 | 2020-02-28 | 深圳供电局有限公司 | Single-ended protection method for high-voltage direct-current transmission line and computer equipment |
| CN114038283A (en) * | 2021-11-19 | 2022-02-11 | 广东电网有限责任公司 | Flexible direct current distribution network steady state and transient state off-line simulation and training system |
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| CN108646166A (en) * | 2018-04-12 | 2018-10-12 | 广东电网有限责任公司 | A kind of flexible direct current starting-up later time differential protection test method based on phase compensation |
| CN108646166B (en) * | 2018-04-12 | 2020-04-14 | 广东电网有限责任公司 | Flexible direct current starting loop differential protection test method based on phase compensation |
| CN109004630A (en) * | 2018-07-27 | 2018-12-14 | 国网江苏省电力有限公司苏州供电分公司 | A kind of flexible direct current power distribution network integrated protection system |
| CN110850154A (en) * | 2019-11-11 | 2020-02-28 | 深圳供电局有限公司 | Single-ended protection method for high-voltage direct-current transmission line and computer equipment |
| CN110850154B (en) * | 2019-11-11 | 2022-02-08 | 深圳供电局有限公司 | Single-ended protection method for high-voltage direct-current transmission line and computer equipment |
| CN114038283A (en) * | 2021-11-19 | 2022-02-11 | 广东电网有限责任公司 | Flexible direct current distribution network steady state and transient state off-line simulation and training system |
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