CN106058832A - Local rapid isolation implementation method - Google Patents
Local rapid isolation implementation method Download PDFInfo
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- CN106058832A CN106058832A CN201610664121.5A CN201610664121A CN106058832A CN 106058832 A CN106058832 A CN 106058832A CN 201610664121 A CN201610664121 A CN 201610664121A CN 106058832 A CN106058832 A CN 106058832A
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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
- H02H7/261—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 involving signal transmission between at least two stations
- H02H7/262—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 involving signal transmission between at least two stations involving transmissions of switching or blocking orders
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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
- H02H7/266—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 involving switching on a spare supply
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- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a local rapid isolation implementation method, and the method comprises the steps that a first intelligent device enables an optical fiber to serve as a channel so as to transmit a current to a second intelligent device; the first intelligent device is connected with the second intelligent device through an optical fiber; the first intelligent device calculates the value of the current in the channel through employing a full-wave Fourier algorithm, enables the value of the current to serve as a side collection value and transmits the side collection value to the second intelligent device through employing an optical fiber; the second intelligent device receives the transmitted current, and enables the value of the collected current to serve as a local collection value; the second intelligent device receives the side collection value, calculates and obtains a differential current through employing the side collection value and the local collection value, and judges whether a protection segment region of the first intelligent device has a fault or not according to the differential current: the second intelligent device executes optical difference protection action to get rid of the fault if the protection segment region of the first intelligent device has the fault, so as to isolate the fault. The method achieves the fast and accurate discrimination of the fault, quickly cuts off and isolates the fault, reduces the maintenance time, and achieves the recovery of power supply as quickly as possible.
Description
Technical field
The present invention relates to distribution network technology field, particularly relate to a kind of implementation method quickly isolated on the spot.
Background technology
At present, the development of power distribution network be with urban construction scale, power load increase rapidly with power supply reliability require and
Propose, due to the clause segmentation of urban planning and electric power, define incompatible distribution net work structure, make distribution network planning and
Development is not suitable with the demand in city, highlights and is reflected in following aspects: 1, electric network composition is complicated, looped network communication contact is more；
2, urban network reconstruction involves a wide range of knowledge, it is desirable to higher, has a power failure rare big；3, urban construction fast development, load growth rate is high, electricity
Not in time, transmission line of electricity radius is little, and circuit is long for power auxiliary construction, and " bottleneck " Benefit Transfer highlights, and power supply capacity does not catches up with；4, early
The city line conductor that phase builds is thin, and aging seriously long neglected and in disrepair, high-energy equipment is many, and accident rate is high；Distribution network automated water
Smooth body is relatively low, and distribution scheduling running technology support means fall behind；5, the station end number of devices of distribution automation is more, communication network
The problems such as network is complicated, these problems bring some new problems to relay equipment the most simultaneously, and relay equipment existence traditionally is transported
Line mode and system oscillation impact is big, fixed value adjusting coordinates that the design of difficulty, protection cooperation is complicated, service restoration is slow, trouble point not
Determine well, protection device quantity the most each more point be set independent protection device will be set and standby functional device of throwing is invested relatively
The problem such as big.
Especially for isolating currently without a good method on the spot, such as example: when a supply line occurs suddenly
After fault, the lead-in circuit breaker protection act tripping operation of feeder ear can be caused thus cause the large-area power-cuts of this power-feed section, the most separately
Stand-by power supply is thrown and is progressively restored electricity by end prepared auto restart action, but because fault is not also discharged, at service restoration to fault
During point section, chopper can trip again, so will result in repeatedly divide-shut brake relatively big to chopper impact, is likely to result in and once sets
For damaging and affect the service restoration time, power off time lengthens, and cannot quickly find trouble point, and the repair time also increases
Long.
Summary of the invention
It is an object of the invention to provide a kind of implementation method quickly isolated on the spot, to realize fast and accurately fault being entered
Row differentiates, excises rapidly fault and isolates, reducing and repair the inspection time, reach to restore electricity as early as possible.
For solving above-mentioned technical problem, the present invention provides a kind of implementation method quickly isolated on the spot, is applied to micro-capacitance sensor
System, including:
Optical fiber is transmitted electric current as passage to the second intelligent apparatus by the first intelligent apparatus；Described first intelligent apparatus passes through
Described optical fiber is connected with described second intelligent apparatus；
Described first intelligent apparatus utilizes full wave Fourier algorithm to calculate the current value of electric current described in passage and adopts as side
Set value, utilizes described optical fiber that described side collection value is transferred to described second intelligent apparatus；
Described second intelligent apparatus receives the described electric current transmitted, and gathers the current value of described electric current as local terminal
Collection value；
Described second intelligent apparatus receives described side collection value, utilizes described side collection value and described local terminal collection value
It is calculated difference current, judges whether the protection section region of described first intelligent apparatus occurs event according to described difference current
Barrier, if so, performs optical difference protection action by failure removal, isolated fault.
Preferably, optical fiber is transmitted electric current as passage to the second intelligent apparatus by described first intelligent apparatus, including:
Described electric current is converted to the signal of telecommunication by described first intelligent apparatus, and the described signal of telecommunication is converted to optical signal, by institute
State optical signal and pass to the second intelligent apparatus by optical fiber.
Preferably, described second intelligent apparatus receives the described electric current transmitted, including:
Described second intelligent apparatus receives described optical signal, and described optical signal is converted to the described signal of telecommunication, by described
The signal of telecommunication is converted to described electric current.
Preferably, described execution optical difference protection action, by failure removal, after isolated fault, also includes:
Described first intelligent apparatus sends standby voted signal to the 3rd intelligent apparatus, informs described to described 3rd intelligent apparatus
Breaking down in the protection section region of the first intelligent apparatus, it will powering-off state occurs；
Described 3rd intelligent apparatus receives described standby voted signal；
Described 3rd intelligent apparatus judges voltage whether decompression, if voltage decompression, confirms to occur powering-off state, performs standby throwing
Action restores electricity.
Preferably, described current value includes current amplitude and current phase.
Preferably, described judge whether the protection section region of described intelligent apparatus breaks down according to described difference current,
Including:
According to described difference current, light differential current guard method is used to judge the guarantor of described first intelligent apparatus
Whether the section of protecting region breaks down.
Preferably, described employing light differential current guard method judges the protection section district of described first intelligent apparatus
Whether territory breaks down, including:
Described side collection value and described local terminal collection value is utilized to be calculated stalling current；
If described difference current is more than presetting light difference streaming current definite value, and described difference current is more than stalling current
0.6 times, it is determined that break down in the protection section region of described first intelligent apparatus.
Preferably, described differential protection action is trip operation.
A kind of implementation method quickly isolated on the spot provided by the present invention, is applied to micro-grid system, the first intelligence dress
Put and optical fiber is transmitted electric current as passage to the second intelligent apparatus；Described first intelligent apparatus passes through described optical fiber and described second
Intelligent apparatus connects；Described first intelligent apparatus utilizes full wave Fourier algorithm to calculate the current value of electric current described in passage as side
End collection value, utilizes described optical fiber that described side collection value is transferred to described second intelligent apparatus；Described second intelligent apparatus
Receive the described electric current transmitted, and gather the current value of described electric current as local terminal collection value；Described second intelligent apparatus
Receive described side collection value, utilize described side collection value and described local terminal collection value to be calculated difference current, according to institute
State difference current and judge whether the protection section region of described first intelligent apparatus breaks down, if so, perform optical difference protection action
By failure removal, isolated fault.Visible, fast and accurately fault is sentenced by configuring optical difference protection in distribution network system
Not, excise rapidly fault and isolate, so by realizing the discovery trouble point in time of isolation on the spot and getting rid of trouble point, it is simple to carry out
Repair and maintenance, reduces power off time, improves service restoration speed, and reduces power failure range, it is ensured that whole grid equipment safety,
Realize in this way fast and accurately fault being differentiated, excise rapidly fault and isolate, reducing and repair the inspection time, reaching to the greatest extent
Restore electricity soon.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
In having technology to describe, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only this
Inventive embodiment, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to according to
The accompanying drawing provided obtains other accompanying drawing.
Fig. 1 is the flow chart of a kind of implementation method quickly isolated on the spot provided by the present invention；
Fig. 2 is schematic network structure in distribution network system of the present invention；
Fig. 3 is that optical difference protection coordinates schematic diagram；
Fig. 4 is acting characteristic curve synoptic diagram；
Fig. 5 is standby throwing situation schematic diagram in network backup power automatic switching function；
Fig. 6 is throwing situation schematic diagram off guard in network backup power automatic switching function；
Fig. 7 is optical fiber differential protective principle schematic；
Fig. 8 is that isolation differentiates logical schematic on the spot；
Fig. 9 is that network is standby throws logical schematic；
Figure 10 is that network allows standby voted signal to send differentiation logical schematic；
Figure 11 is that network lock up sends differentiation logical schematic for voted signal.
Detailed description of the invention
The core of the present invention is to provide a kind of implementation method quickly isolated on the spot, to realize entering fault fast and accurately
Row differentiates, excises rapidly fault, reaches to restore electricity as early as possible, and the inspection time is repaiied in reduction.
In order to make those skilled in the art be more fully understood that the present invention program, below in conjunction with in the embodiment of the present invention
Accompanying drawing, is clearly and completely described the technical scheme in the embodiment of the present invention, it is clear that described embodiment is only
The a part of embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under not making creative work premise, broadly falls into the scope of protection of the invention.
Refer to the flow chart that Fig. 1, Fig. 1 are a kind of implementation method quickly isolated on the spot provided by the present invention, the party
Method is applied to micro-grid system, and the method includes:
Optical fiber is transmitted electric current as passage to the second intelligent apparatus by the S11: the first intelligent apparatus；
Wherein, the first intelligent apparatus is connected by optical fiber and the second intelligent apparatus；
S12: the first intelligent apparatus utilizes full wave Fourier algorithm to calculate in passage the current value of electric current as side collection value,
Utilize optical fiber that side collection value is transferred to the second intelligent apparatus；
S13: the second intelligent apparatus receives the electric current transmitted, and gathers the current value of electric current as local terminal collection value；
S14: the second intelligent apparatus receives side collection value, utilizes side collection value to be calculated differential with local terminal collection value
Electric current, judges according to difference current whether the protection section region of the first intelligent apparatus breaks down, and if so, performs optical difference protection and moves
Make failure removal, isolated fault.
Visible, fast and accurately fault is differentiated by configuring optical difference protection in distribution network system, excise rapidly
Fault is also isolated, so by realizing the discovery trouble point in time of isolation on the spot and getting rid of trouble point, it is simple to carry out repair and maintenance, subtract
Few power off time, improves service restoration speed, and reduces power failure range, it is ensured that whole grid equipment safety, and institute is in this way
Realize fast and accurately fault being differentiated, excise rapidly fault and isolate, reducing and repair the inspection time, reach to recover as early as possible to supply
Electricity.
Based on said method, concrete, in step S11, optical fiber is filled to the second intelligence by the first intelligent apparatus as passage
Put transmission electric current process particularly as follows: the first intelligent apparatus converts electrical current into the signal of telecommunication, convert electrical signals to optical signal, will
Optical signal passes to the second intelligent apparatus by optical fiber.
In step S13, the second intelligent apparatus receives the process of the electric current transmitted particularly as follows: the second intelligent apparatus receives
To optical signal, convert optical signals to the signal of telecommunication, the signal of telecommunication is converted to electric current.
Concrete, current value includes current amplitude and current phase.Second intelligent apparatus receives side collection value, utilizes side
End collection value is calculated difference current with local terminal collection value, judges the protection section region of the first intelligent apparatus according to difference current
Whether break down, if it is not, do not perform optical difference protection action, keep current state.
Differential protection action is trip operation.
Concrete, this method is applied to relate to distribution network system ring network power supply 35kV and level below ring network power supply or small-sized
Switchgear house, goes out the main electrical scheme of feeder line and circuit breaker type Application Design according to duplicate supply origin system list, possesses circuit breaker type and " pull
Hands " ring network power supply end, small distribution room or switching station, box-like power distribution station；Support application circumstances.In order to solve for more coming
Electricity customers continuous safe is the most intricately improved reliability by power distribution network electric power system with powering, reduces power off time and improve
Service restoration speed, reduces power failure range, it is ensured that whole grid equipment safety, and the present invention can find event by realizing isolation on the spot
Barrier point is convenient for repair and maintenance, network structure such as Fig. 2 in the distribution network system of the present invention.
This method utilizes full wave Fourier algorithm to calculate amplitude and the phase place of each current channel by analog acquisition passage；
And use optical fiber solutions that value is transferred to optical fiber offside intelligent apparatus, offside device be worth with local terminal collection after receiving value into
Row difference current calculates, and produces bigger difference current when a failure occurs it, and optical difference protection action is by failure removal.Wherein, it is considered to
Transient fault avoids excising power supply by mistake, and optical difference protection may be configured as twice action, as twice meets operation condition at short notice
Show that fault is implicitly present in, now by failure removal.Wherein, to support at least 4 loops during configuration optical fiber differential protective, allow 4
The equation of light cooperation of individual loop ensures in complex situations can accurately isolated fault.Distribution network system line construction is complicated, protection cooperation
Demand increases, and designs 4 optical fiber interfaces for tackling the new demand present invention, and a termination can be carried out with 4 terminals simultaneously
Optical difference protection coordinates, and terminal described here is intelligent apparatus, and optical fiber connects and can use cross-connection system in any combination
Or parallel linkage, so design are more comprehensive for complex circuit ground distribution protection, and Fault Isolation is effective, the equation of light
Protection cooperation is as shown in Figure 3.
Further, in step S14, judge what whether the protection section region of intelligent apparatus broke down according to difference current
Process is particularly as follows: according to difference current, use light differential current guard method to judge the protection section of the first intelligent apparatus
Whether region breaks down.
Light differential current guard method is used to judge whether the protection section region of the first intelligent apparatus breaks down
Process particularly as follows: utilize side collection value and local terminal collection value to be calculated stalling current；If difference current is more than presetting light
Line difference current definite value, and difference current is more than 0.6 times of stalling current, it is determined that the protection section region of the first intelligent apparatus is sent out
Raw fault.
Wherein, optical fiber differential current is protected by circuit optical fiber passage, transmits hits to offside device in real time
According to, receiving the real-time sampling data of offside simultaneously, each side Sustainable use is local and offside current data is by phase inlet wire difference current
Calculate.Braking characteristic equation inlet wire according to current differential protection differentiates, it determines trip for action during troubles inside the sample space, it determines for district
During outer fault, protection is failure to actuate.
Wherein, receive in the case of the real-time sampling data of offside need to consider different no-load voltage ratio, utilize the definite value will be to side line circuit
The value inlet wire being transferred to this side line road compensates, and could keep consistent with the electric current of this side after only compensating.Specifically it is calculated as follows:
Wherein: φ is A, B, C three-phase.
With the corresponding secondary current in this side after expression offside line build-out；TAD_1Represent offside TA mono-sub-value；
TAD_2Represent offside TA bis-sub-value；TAB_1Represent this side TA mono-sub-value；TAB_2Represent this side TA bis-sub-value；
The computing formula of difference current is:
The computing formula of stalling current is:
Optical fiber phase differential protection percentage differential criterion is as follows:
Meet simultaneously
Wherein: φ is A, B, C.IgcdFor optical differential current ration.Acting characteristic curve is as shown in Figure 4.
Additionally, it is possible to take split-phase breakage lock device mode to judge whether the protection section region of the first intelligent apparatus occurs event
Barrier, situation is as follows:
When putting into " the CT breakage lock device equation of light " control word, when there is instantaneous CT broken string, by locking optical difference protection.
The instantaneous CT breakage lock device equation of light and time delay 5s broken string alarm are divided into for CT broken string, it determines condition is as follows:
When meet more than three any one meet condition time occur instantaneous CT to break.When every loop puts into CT break alarm merit
During energy, (such as: KTA_n_FU=1), time delay 5s reports CT broken string alarm.It should be noted that In represents the n-th line current transformer secondary
Load current value, is i.e. arranged at system definite value inventory.
Isolate on the spot ensure to allow main power source normal power supply under impermanency failure condition for realizing fault, this method pin
Optical differential is provided with dedicated functions and coordinates fault distinguish, complete the cooperation with regard to earth fault and the equation of light, by Fault Isolation.Optical fiber
Differential protection situation is as follows:
1) when control word " Fault Isolation on the spot " control word is 0, now judge to belong to normal condition, when optical difference protection is full
Regular event during foot condition；
2) when control word " Fault Isolation on the spot " control word is 1, now judge to belong to Fault Isolation state on the spot, work as light
When difference protection for the first time meets condition, now optical difference protection is failure to actuate outlet, the most not message, only records and meets action bar 1 time
Part set " isolation mark on the spot " is 1, and this mark keeps 3s；As when an optical difference protection occurs within the 3s time again, will stand
I.e. equation of light action.
When the equation of light meets operation condition, in the case of 2 times of definite values, the terminal action time is less than 30ms, it is considered to chopper machine
Structure 100ms movement time, can be by failure removal within the 130ms time after so breaking down.
Further, in step S14, execution optical difference protection action, by failure removal, after isolated fault, also includes following
Step:
S21: the first intelligent apparatus sends standby voted signal to the 3rd intelligent apparatus, informs the first intelligence to the 3rd intelligent apparatus
Breaking down in the protection section region of device, it will powering-off state occurs；
S22: the three intelligent apparatus receives standby voted signal；
S23: the three intelligent apparatus judges voltage whether decompression, if voltage decompression, confirms to occur powering-off state, performs standby throwing
Action restores electricity.
After optical difference protection action of breaking down, may result in a part of electrical equipment dead electricity because power supply is cut, this
In invention, utilize communication Ethernet cable when all intelligent apparatus are all connected with background host computer also simultaneously between intelligent apparatus
Formed and connect, when can be by the way of sending standby voted signal to other devices after one of them intelligent apparatus optical difference protection action
Inform this protection section break down may power-off, and whether decompression situation is joined by voltage to receive the intelligent apparatus of standby voted signal
Close this and confirm that dead electricity standby throwing action restore electricity for voted signal.The present invention can be by configuring equation of light guarantor in distribution network system
Protect and fast and accurately fault is differentiated, excise rapidly fault and isolate, and coordinating the function of communication network to start rapidly
Standby functional rehabilitation of throwing is powered.
After fault is cut, non-fault line should quickly be restored electricity by system, and conventional microcomputer spare power is right
Voltage and on-off state carry out single differentiation, if should standby not throw in circuit top generation catastrophe failure, but according to voltage
Can cause again tripping and switch palikinesia, this method for throwing action with on-off state situation routine microcomputer spare power
Using standby throwing mode for this problem, propose more safely and reliably to restore electricity mode i.e. network backup power automatic switching function, net
Network backup power automatic switching function can freely be arranged.
Network backup power automatic switching function itself it is crucial that communication network, modern Intellectual computer device mainly presses the form of ethernet communication
Setting up communication network, centre has the equipment such as switch, router that all devices communicate data transmission, network prepared auto restart merit
Can i.e. utilize this communication port, allow configuration each terminal in the line form contact, differentiated by the terminal of each node
Determine the need for standby throwing.Such as with reference to Fig. 5, when being powered to 4# by 1#, if fault occurs between 2#-3#, 2# and
3# device can send network signal to 5# device, after 5# device receives signal, and can be quick according to voltage and on off state
Carry out standby throwing to restore electricity.With reference to Fig. 6, for throwing situation off guard, if fault occurs to talk about between 4-5#, 4# device is just not required to set
Put transmission network, even if so voltage and Switching Condition meet, the throwing the most off guard of 5# device.
After optical difference protection action of breaking down, may result in a part of electrical equipment dead electricity because power supply is cut, this
Method utilizes communication Ethernet cable also simultaneously shape between intelligent apparatus when all intelligent apparatus are all connected with background host computer
Become to connect, when accusing by the way of sending standby voted signal to other devices after one of them intelligent apparatus optical difference protection action
Know this protection section break down may power-off, and whether decompression situation coordinates by voltage to receive the intelligent apparatus of standby voted signal
For voted signal, this confirms that dead electricity standby throwing action restore electricity.
Also can just go when there is manual brake separating signal to transmit the standby mode thrown of locking, it is to avoid false switching simultaneously.Specifically patrol
Collect as follows:
Charging modes:
1) the equal three-phase of bus have pressure Min (Uab, Ubc, Uca) ＞ Uyy, Ux ＞ Uyy,.
2) chopper is in a point position.
3) soft pressing plate is set to 1.
Proceed by charging after meeting conditions above, complete, after time delay " standby throwing charging interval ", the CD that charges.
For discharging condition, meeting following either condition will discharge:
1, circuit controls loop extremely；
2, bus is without time delay 15s in the case of pressure Max (Uab, Ubc, Uca) ＜ Uwy and Ux ＜ Uwy；
3, chopper is in conjunction position；
4, standby throw soft pressing plate be set to 0 or hands jump signal and open into for 1；
5, this line loop operation separating brake；
6, network lock up is for voted signal=1；
7, this optical fiber phase differential action.
Course of action includes: when after charging complete, when bus is without pressure Max (Uab, Ubc, Uca) ＜ Uwy, line voltage distribution Ux
＞ Uyy, chopper is without stream Max (Ia, Ib, Ic) ＜ Iwl, it is allowed to when the standby throwing of network startup is masked as 1, then time delay Th make and break road
Device.
When circuit generation decompression needs standby throwing action, operator logo is less than 200ms from being issued to reception, meets voltage
Condition starts standby throwing and then sends standby bid will from equation of light action of breaking down less than 35ms, analysis result, arrive movement time
The time of restoring electricity should be in 300ms.It addition, the relevant software development of this method and hardware designs, refer to Fig. 7, Fig. 8, figure
9, Figure 10, Figure 11.
The present invention can quickly find fault, excision fault in distribution network system, finds trouble point for convenience, will
Fault Isolation, in a bit of scope of power supply, does not affect whole electrical network and powers；Use network for throwing mode by quick net
Network communications correlating markings, it is achieved quickly inform fault, starts the standby function that restores electricity of throwing, so only need to join at turnover line end
Purchase and throw device or the automatic circuit of function.
To sum up, a kind of implementation method quickly isolated on the spot provided by the present invention, it is applied to micro-grid system, the first intelligence
Device optical fiber can be transmitted electric current as passage to the second intelligent apparatus；First intelligent apparatus passes through optical fiber and the second intelligent apparatus
Connect；First intelligent apparatus utilizes full wave Fourier algorithm to calculate the current value of electric current in passage and, as side collection value, utilizes light
Side collection value is transferred to the second intelligent apparatus by fibre；Second intelligent apparatus receives the electric current transmitted, and gathers electric current
Current value is as local terminal collection value；Second intelligent apparatus receives side collection value, utilizes side collection value and local terminal collection value meter
Calculation obtains difference current, judges according to difference current whether the protection section region of the first intelligent apparatus breaks down, and if so, performs
Optical difference protection action is by failure removal, isolated fault.Visible, by configuring optical difference protection fast and accurately in distribution network system
Fault is differentiated, excises rapidly fault and isolate, so pass through realize the discovery trouble point in time of isolation on the spot and get rid of event
Barrier point, it is simple to carry out repair and maintenance, reduces power off time, improves service restoration speed, and reduces power failure range, it is ensured that be whole
Grid equipment safety, realizes differentiating fault fast and accurately in this way, excises rapidly fault and isolates, and reduction is repaiied
The inspection time, reach to restore electricity as early as possible.
Above a kind of implementation method quickly isolated on the spot provided by the present invention is described in detail.Herein should
Being set forth principle and the embodiment of the present invention by specific case, the explanation of above example is only intended to help reason
Solve method and the core concept thereof of the present invention.It should be pointed out that, for those skilled in the art, without departing from
On the premise of the principle of the invention, it is also possible to the present invention is carried out some improvement and modification, these improve and modification also falls into this
In bright scope of the claims.
Claims (8)
1. the implementation method quickly isolated on the spot, it is characterised in that be applied to micro-grid system, including:
Optical fiber is transmitted electric current as passage to the second intelligent apparatus by the first intelligent apparatus；Described first intelligent apparatus is by described
Optical fiber is connected with described second intelligent apparatus；
Described first intelligent apparatus utilizes full wave Fourier algorithm to calculate the current value of electric current described in passage as side collection value,
Utilize described optical fiber that described side collection value is transferred to described second intelligent apparatus；
Described second intelligent apparatus receives the described electric current transmitted, and gathers the current value of described electric current as local terminal collection
Value；
Described second intelligent apparatus receives described side collection value, utilizes described side collection value to calculate with described local terminal collection value
Obtain difference current, judge according to described difference current whether the protection section region of described first intelligent apparatus breaks down, if
It is to perform optical difference protection action by failure removal, isolated fault.
2. the method for claim 1, it is characterised in that described first intelligent apparatus using optical fiber as passage to the second intelligence
Electric current can be transmitted by device, including:
Described electric current is converted to the signal of telecommunication by described first intelligent apparatus, and the described signal of telecommunication is converted to optical signal, by described light
Signal passes to the second intelligent apparatus by optical fiber.
3. method as claimed in claim 2, it is characterised in that described second intelligent apparatus receives the described electricity transmitted
Stream, including:
Described second intelligent apparatus receives described optical signal, and described optical signal is converted to the described signal of telecommunication, by described telecommunications
Number it is converted to described electric current.
4. the method for claim 1, it is characterised in that described execution optical difference protection action is by failure removal, isolation event
After barrier, also include:
Described first intelligent apparatus sends standby voted signal to the 3rd intelligent apparatus, informs described first to described 3rd intelligent apparatus
Breaking down in the protection section region of intelligent apparatus, it will powering-off state occurs；
Described 3rd intelligent apparatus receives described standby voted signal；
Described 3rd intelligent apparatus judges voltage whether decompression, if voltage decompression, confirms to occur powering-off state, performs standby throwing action
Restore electricity.
5. the method for claim 1, it is characterised in that described current value includes current amplitude and current phase.
6. the method for claim 1, it is characterised in that described judge described intelligent apparatus according to described difference current
Whether protection section region breaks down, including:
According to described difference current, light differential current guard method is used to judge the protection section of described first intelligent apparatus
Whether region breaks down.
7. method as claimed in claim 6, it is characterised in that described employing light differential current guard method judges institute
Whether the protection section region stating the first intelligent apparatus breaks down, including:
Described side collection value and described local terminal collection value is utilized to be calculated stalling current；
If described difference current is more than presetting light difference streaming current definite value, and described difference current is more than 0.6 times of stalling current,
Then determine to break down in the protection section region of described first intelligent apparatus.
8. method as claimed in any of claims 1 to 7 in one of claims, it is characterised in that described differential protection action is dynamic for tripping operation
Make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610664121.5A CN106058832B (en) | 2016-08-12 | 2016-08-12 | A kind of implementation method quickly isolated on the spot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610664121.5A CN106058832B (en) | 2016-08-12 | 2016-08-12 | A kind of implementation method quickly isolated on the spot |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106058832A true CN106058832A (en) | 2016-10-26 |
| CN106058832B CN106058832B (en) | 2018-10-16 |
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| CN106972468A (en) * | 2017-04-13 | 2017-07-21 | 北京四方继保自动化股份有限公司 | A kind of method protected by maximum fault current locking differential current |
| CN108923397A (en) * | 2018-07-09 | 2018-11-30 | 广东电网有限责任公司 | A kind of distribution system and the distribution method for realizing Fault Isolation |
| CN114640093A (en) * | 2022-02-23 | 2022-06-17 | 北京天能继保电力科技有限公司 | Method and device for protecting broken line of distributed power transmission and distribution line |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106972468A (en) * | 2017-04-13 | 2017-07-21 | 北京四方继保自动化股份有限公司 | A kind of method protected by maximum fault current locking differential current |
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| CN114640093A (en) * | 2022-02-23 | 2022-06-17 | 北京天能继保电力科技有限公司 | Method and device for protecting broken line of distributed power transmission and distribution line |
| CN114640093B (en) * | 2022-02-23 | 2023-03-24 | 北京天能继保电力科技有限公司 | Method and device for protecting broken line of distributed power transmission and distribution line |
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