CN110086167A - A kind of alternating current-direct current mixed connection power distribution network self-healing control system and control method - Google Patents
A kind of alternating current-direct current mixed connection power distribution network self-healing control system and control method Download PDFInfo
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- CN110086167A CN110086167A CN201910270688.8A CN201910270688A CN110086167A CN 110086167 A CN110086167 A CN 110086167A CN 201910270688 A CN201910270688 A CN 201910270688A CN 110086167 A CN110086167 A CN 110086167A
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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
- H02H7/261—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
- H02H7/28—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 meshed systems
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
Abstract
The invention discloses a kind of alternating current-direct current mixed connection power distribution network self-healing control system and control methods.Control system of the invention includes intelligent distributed device, circuit optical fiber longitudinal differential protecting equipment and soft straight tuning controller; the intelligent distributed device is mounted on the switchyard and looped network case of AC distribution net; the circuit optical fiber longitudinal differential protecting equipment is mounted on the outlet switch of substation and soft straight converter station, and the soft straight tuning controller is mounted on soft straight converter station；Intelligent distributed device is completed to exchange the fault location isolation of side with circuit optical fiber longitudinal differential protecting equipment, while transmitting busbar voltage by optical-fibre channel and realizing asynchronous switch-on；Intelligent distributed device and soft straight tuning controller realize the rapidly self-healing in non-faulting region by GOOSE real time interaction information.The present invention realizes the rapidly self-healing of the AC-DC hybrid power grid containing soft straight converter station, realizes asynchronous switch-on in the case where not configuring separate lines PT.
Description
Technical field
The invention belongs to distribution automation field, specifically a kind of alternating current-direct current mixed connection power distribution network self-healing control system and
Control method.
Background technique
Multiterminal based on Technics of Power Electronic Conversion technological maheup are soft straight " electric energy router ", realize power distribution network, the polynary energy and
The electric energy of load interconnects, and has the multidirectional flexible control of energy, balanced load and continuous duty and turns to supply, Operation Mode Optimization is promoted
Power supply quality and reliability.Using flexible interconnection, active power can be flexibly controlled, guarantees that each line power evenly distributes, also
Idle offer support can be provided, effectively solved present in power distribution network: power supply capacity is insufficient, power supply reliability is low, each area's load
The problems such as unbalanced.Reliability requirement is unable to satisfy for single supply power supply, dual power supply is powered simultaneously to be stopped by prepared auto restart switching
The electric time is hundred milliseconds to second grade, is not still able to satisfy the load of reliability requirement, can be transmitted electricity by regular alternating current plus flexible
Direct current transportation mixing power transmission mode, realizes the uninterrupted power supply of dual power supply.
Soft straight converter station is a kind of novel flexible one that traditional interconnection switch can be substituted on several key nodes of power distribution network
Secondary device, it is intended to traditional feeder line interconnection switch based on breaker is replaced with controllable converters, to realize feeder line
Between normalization it is flexible " being flexible coupling ", provide flexibly, fast, accurately power interactive controlling and tide optimization ability.Meanwhile it is soft straight
Converter station realizes that there are angular difference situations such as the interconnection of realization different voltage grade to conventional distribution operation bring optimization after being added
Under interconnection.
It is very high for rapidity requirement of the distribution containing soft straight converter station to protection act and short circuit current is small, optical difference protection
It is fast independent of overcurrent, high sensitivity, speed, it can be used as main protection；For the place of some bad installation optical difference protections, can make
Use network topology protection as main protection.
Low and medium voltage distribution network was commonly single-side power framework in the past, and side is that system side is connect with bulk power grid, side load
Side is connected to various power consumers, and the protection that this kind of route is matched is common route protection.With alternating current-direct current mixed connection power distribution network
Development, change the rack framework of traditional single supply, many route two sides are all connected to power supply, for this kind of route, failure electricity
Stream be no longer it is single load side is flowed to by system side, but fault point can be flowed to from route two sides.Vertical on line road optical difference protection
Due to having the characteristics that full line quick-break, it is widely used in such Double-End Source route.
When the route that one is originally common single ended power supply becomes the route of a both end power supplying, in addition to by common line
Protective device is substituted for other than equipment for protecting optical fibre longitudinal difference, and reclosing mode and remote control mode are also required to make adjustment.Ordinary lines
Road protection when executing reclosing and remote control is closed a floodgate, due to load side after switching tripping necessarily passive state, so
The voltage for not needing detection opposite side when closing a floodgate is protected, therefore route PT will not be matched in this kind of line switching cabinet.Become double
After power circuit, when reclosing and remote control close a floodgate, needs to consider to switch the same period state of closing moment two sides voltage, avoid
Because closing moment voltage not the same period due to generate biggish dash current because the high current one when non-Switching Synchronization can to open circuit
Device brings impact, if two carry out the overcurrent protection definite value that electric current reaches protective device setting, will lead to overcurrent protection tripping, causes
It closes a floodgate and fails.So needing to configure route PT in the switchgear of this route.And inside switch cabinet Spatial General 6 R is more tight
, many times there is no the positions of reserved route PT, need entirely to replace switchgear when transformation, increase transformation
Cost and time.
Summary of the invention
Route PT can not be placed for switchgear and protective device needs to access the occasion of synchronous voltage, the present invention proposes
A kind of alternating current-direct current mixed connection power distribution network self-healing control system, with realize the AC-DC hybrid power grid containing soft straight converter station quickly from
More, asynchronous switch-on is realized in the case where not configuring separate lines PT.
For this purpose, the present invention adopts the following technical scheme that: a kind of alternating current-direct current mixed connection power distribution network self-healing control system, including intelligence
It can distributed devices, circuit optical fiber longitudinal differential protecting equipment and soft straight tuning controller；
The intelligent distributed device is mounted on the switchyard and looped network case of AC distribution net, and the circuit optical fiber longitudinal differential is protected
Protection unit is mounted on the outlet switch of substation and soft straight converter station, and the soft straight tuning controller is mounted on soft straight converter station；
Intelligent distributed device is completed to exchange the fault location isolation of side with circuit optical fiber longitudinal differential protecting equipment, while passing through optical-fibre channel
It transmits busbar voltage and realizes asynchronous switch-on；Intelligent distributed device and soft straight tuning controller pass through GOOSE real time interaction information,
Realize the rapidly self-healing in non-faulting region.
Further, the step of realizing asynchronous switch-on is specific as follows:
Step 1: the busbar voltage data for being acquired the circuit optical fiber longitudinal differential protecting equipment of optical fiber side using optical-fibre channel
It is transmitted to the circuit optical fiber longitudinal differential protecting equipment of optical fiber opposite side；
Step 2: will receive to side bus voltage data and this side line road equipment for protecting optical fibre longitudinal difference busbar voltage number
According to processing is synchronized, synchronization processing method uses Sampling interrupt adjusting method or interpolation method；
Step 3: voltage magnitude and phase compensation processing will be carried out to side bus voltage；
Step 4: will treated to side bus voltage as synchronous voltage mentions by synchronous, voltage magnitude and phase compensation
Supply reclosing, remote control is closed a floodgate or the hand indentured period uses.
Route PT can not be placed for switchgear and protective device needs to access the occasion of synchronous voltage, the present invention proposes
A kind of asynchronous switch-on implementation method suitable for optical difference protection will be protected using the existing optical-fibre channel of optical fiber differential protective
The busbar voltage data of device acquisition are sent to route opposite side protective device, after synchronous and amplitude, phase compensation processing,
It will receive to side bus voltage and to be used as synchronous voltage, both met the demand of asynchronous switch-on, also saved increase line
The expense of road PT and transformation time.
Further, the circuit optical fiber longitudinal differential protecting equipment of route two sides does not configure dedicated route PT, synchronous voltage
The busbar voltage transmitting of route opposite side is carried out by existing optical-fibre channel.
Further, the Sampling interrupt adjusting method process that the synchronization process of the step 2 uses is as follows: 1) utilizing ping-pong procedure
Calculate optical-fibre channel transmission delay t1；2) sending side is recorded, when sending from voltage data sampling time t2 to voltage data
Between t3 time interval t4；3) voltage data received is stamped into local markers t5 in receiving side；4) according to t1 the and t4 time pair
It receives markers t5 to retract, t6 at the time of obtaining opposite side sampling instant under this side time system；5) local bus is recorded
Voltage sample time t7 compares the time difference △ t of t6 and t7；6) sampling of adjustment circuit optical fiber longitudinal differential protecting equipment wherein side
Moment, so that △ t levels off to 0.
Further, the interpolation method process that the synchronization process of the step 2 uses is as follows: 1) calculating light using ping-pong procedure
Fine channel transfer postpones Tdly；2) circuit optical fiber longitudinal differential protecting equipment receives the data frame from optical-fibre channel, will be from data frame
In the sampled data that parses be stored in caching, while recording Trecv at the time of data frame head reaches, solved from data frame
Analysis obtains sampling and sends delay time Tgap_st；3) delay time and channel transfer are sent according to data frame arrival time, sampling
Delay calculates the frame sampling data and corresponds to sampling instant t1=Trecv-Tgap_st-Tdly under local system time system,
And the moment is stored in caching, while the analog sampled data read out from local A/D sampling channel and sampling markers are also deposited
It is placed in data buffer storage；4) in data buffer storage, the either data that transmit of local data or receiving channel, all record have pair
First-order linear interpolation should be done using Lagrange's interpolation algorithm to the sampling instant under current system, since interpolation point is simultaneously
It carves, so the sampled data that interpolation goes out is also synchronization, is used for asynchronous switch-on.
The existing optical-fibre channel of differential protection is utilized in asynchronous switch-on method of the invention, by the acquisition of each side protective device
Busbar voltage issues opposite side protective device by optical fiber.Protective device is after receiving the voltage that opposite side is sent, it is necessary first to right
Voltage and this side sampled value synchronize processing, and method can use Sampling interrupt moment adjusting method or interpolation method.In sampling
Disconnected moment adjusting method is that one in specified two differential protections is used as from side device, and another is used as main side device.By
The deviation of two sides protective device sampling instant is calculated from side device, and constantly adjusts the sampling instant from side device, reaches two sides
Protective device is sampled in the same time, realizes the synchronization of sampled data.
And interpolation method, be two differential protections respectively calculate from data collect send data time interval with
And communication channel delay, and released back and forth according to the received markers of sampled data when receiving sampling of the data under this side device clock
It carves.The sampled value of this side and opposite side is obtained in this way by the sampling instant under present apparatus system time, when selecting interpolation by device
It carves, which will carry out interpolation to the moment for the sampled data of this side and other each sides earlier than earliest data sampling instants
It handles, the data after interpolation are synchronously sampled data.
Different from independent route PT is installed, there are difference in magnitude and phase angle difference for route both ends busbar voltage, to side bus
Voltage is after synchronization process, it is also necessary to compensate to fixed existing difference in magnitude and phase angle difference.The theoretical foundation of compensation
It is to think under breaker coincidence state, busbar voltage and synchronous voltage should phase be consistent, amplitude is consistent.
The present invention also provides the control methods of above-mentioned alternating current-direct current mixed connection power distribution network self-healing control system comprising step:
Step 1: AC distribution net breaks down, and intelligent distributed device and circuit optical fiber longitudinal differential protecting equipment quickly position
Failure is simultaneously isolated, and for intelligent distributed device using optical difference protection as main protection, network topology protection is used as nearly back-up protection,
Overcurrent protection is as remote back-up protection；Soft straight converter station enters fault traversing during simultaneous faults occurs；
Step 2: if exchange side fault location confinement period, soft straight converter station thus smoothly complete fault traversing, due to therefore
Phragma defection cuts off power supply point, and soft straight converter station just enters networking and turns island mode；If soft straight converter station fault traversing failure,
Then can lockout port, adjust operating mode after, put into operation again；
Step 3: if soft straight converter station networking turns isolated island success, entering overload anticipation, soft remaining end of straight converter station
The sum of memory electric current is less than definite value plus memory electric current before failure point failure when cause for gossip, then by soft straight converter station preferentially to non-event
Hinder region to carry out quickly turning to supply, realizes self-healing；
Step 4: if soft straight converter station networking turns isolated island failure or out of service for some reason, the contact of load other end power supply
Switch enters overload anticipation, and electric current is remembered plus memory electric current before failure point failure less than fixed in interconnection switch upstream in real time
Value, then intelligent distributed combined floodgate interconnection switch carries out quickly turning to supply to non-faulting region, realizes self-healing.
The device have the advantages that as follows: the present invention uses the equation of light as main protection, and network topology is as nearly standby
Protection protects equipment real time interaction information using the control of GOOSE and soft straight converter station, after power distribution network exchange side is broken down quickly
Then isolated fault cooperates with soft straight converter station quickly to restore electricity power loss region；Meanwhile using the optical fiber of optical difference protection
Channel transmitting realizes asynchronous switch-on to side bus voltage, saves route PT.
Detailed description of the invention
Fig. 1 is self-healing control of the present invention and overload pre-judging method schematic diagram.
Fig. 2 is that same period busbar voltage method schematic diagram is transmitted and handled to optical-fibre channel of the present invention.
Fig. 3 is asynchronous switch-on flow diagram of the present invention.
Specific embodiment
With reference to the accompanying drawings of the specification, technical solution of the present invention is specifically described.
Embodiment 1
The present embodiment provides a kind of alternating current-direct current mixed connection power distribution network self-healing control systems, including intelligent distributed device, route
Equipment for protecting optical fibre longitudinal difference and soft straight tuning controller, the intelligent distributed device be mounted on AC distribution net switchyard,
Looped network case, the circuit optical fiber longitudinal differential protecting equipment are mounted on the outlet switch of substation and soft straight converter station, the soft straight association
Controller is adjusted to be mounted on soft straight converter station；Intelligent distributed device is completed to exchange the failure of side with circuit optical fiber longitudinal differential protecting equipment
Positioning isolation, while busbar voltage is transmitted by optical-fibre channel and realizes asynchronous switch-on, save route PT；Intelligent distributed device and
Soft straight tuning controller realizes the rapidly self-healing in non-faulting region, i.e. realization AC distribution net by GOOSE real time interaction information
To the quick service restoration in non-faulting region after fault location isolation.
The intelligent distributed device configures optical difference protection, network topology protection, overcurrent protection, zero sequence overcurrent guarantor simultaneously
The functions such as shield, bus differential protection, failure protection are used to quickly positioning, isolated fault.
The circuit optical fiber longitudinal differential protecting equipment dedicated optic fiber channel includes phase current differential protection and zero sequence current differential protection
It protects, when all inlet-outlet lines break down in distribution looped network, optical fiber longitudinal differential protection complete fibre, quickly and selectively
Isolated fault point.
The implementation method of above-mentioned asynchronous switch-on, using following steps:
Step 1: the busbar voltage data for being acquired the circuit optical fiber longitudinal differential protecting equipment of optical fiber side using optical-fibre channel
It is transmitted to the circuit optical fiber longitudinal differential protecting equipment of optical fiber opposite side；
Step 2: will receive to side bus voltage data and this side line road equipment for protecting optical fibre longitudinal difference busbar voltage number
According to processing is synchronized, synchronization processing method uses Sampling interrupt adjusting method or interpolation method；
Step 3: voltage magnitude and phase compensation processing will be carried out to side bus voltage；
Step 4: will treated to side bus voltage as synchronous voltage mentions by synchronous, voltage magnitude and phase compensation
Supply reclosing, remote control is closed a floodgate or the hand indentured period uses.
The intelligent distributed device for being mounted on switchyard and looped network case also has the same period of circuit optical fiber longitudinal differential protecting equipment
Closing function, entire optical-fibre channel transmitting and processing same period busbar voltage method are as shown in Figure 2.
The process of Sampling interrupt adjusting method is as follows: 1) calculating optical-fibre channel transmission delay t1 using ping-pong procedure；2) it records
Lower sending side, from voltage data sampling time t2 to the time interval t4 of voltage data sending time t3；3) it will be received in receiving side
To voltage data stamp local markers t5；4) time receiving mark t5 is docked according to t1 the and t4 time to retract, obtain opposite side sampling
T6 at the time of moment is under the time system of this side；5) local busbar voltage sampling time t7 is recorded, the time of t6 and t7 are compared
Poor △ t；6) sampling instant of adjustment circuit optical fiber longitudinal differential protecting equipment wherein side, so that △ t levels off to 0.
The process of interpolation method is as follows: 1) calculating optical-fibre channel transmission delay Tdly using ping-pong procedure；2) circuit optical fiber longitudinal
Differential protecting equipment receives the data frame from optical-fibre channel, will be stored in caching from the sampled data parsed in data frame,
Trecv at the time of data frame head reaches is recorded simultaneously, and parsing obtains sampling and sends delay time Tgap_st from data frame；
3) delay time is sent according to data frame arrival time, sampling and channel transfer postpones, it is corresponding originally to calculate the frame sampling data
Sampling instant t1=Trecv-Tgap_st-Tdly under ground system time system, and the moment is stored in caching, while from originally
The analog sampled data and sampling markers that ground A/D sampling channel is read out also are stored in data buffer storage；4) in data buffer storage,
The either data that transmit of local data or receiving channel, all record have the sampling instant corresponded under current system, use
Lagrange's interpolation algorithm does first-order linear interpolation, since interpolation point is in the same time, so the sampled data that interpolation goes out is also same
Step, it can be used for asynchronous switch-on.
Asynchronous switch-on mainly has three ways, such as follows:
Not procuratorial organ's formula: bus and synchronous voltage condition are not sentenced, directly allows to close a floodgate；
Checkout voltage mode: when bus without pressure and route have pressure, bus have pressure and route without pressure, bus without pressure and route without pressure
When three condition any bars meet, allow to close a floodgate.
Examine synchronizing mode: within [the waiting time same period], device carries out same period condition distinguishing, and meeting same period condition then allows
It closes a floodgate；Same period condition includes that busbar voltage and synchronous voltage have pressure；Busbar voltage and the voltage difference of synchronous voltage are less than [same
Phase pressure difference is latched definite value]；Busbar voltage and the frequency difference of synchronous voltage are less than [same period frequency difference is latched definite value]；Busbar voltage and the same period
The frequency difference acceleration of voltage is less than [same period frequency difference acceleration is latched definite value]；The angular difference of busbar voltage and synchronous voltage is less than [same
Phase angular difference is latched definite value], the angular difference (bus leading line) of busbar voltage and synchronous voltage according to frequency difference, frequency difference acceleration and
The switch motion time calculates breaker in the phase angle difference of moment of closing a floodgate, and calculation formula is as follows, it is ensured that breaker is in wink of closing a floodgate
Between meet the requirements.
In formula, Δ δ is the angular difference of busbar voltage and synchronous voltage, and Δ f is frequency difference, TdqFor the switch motion time,For
Frequency difference acceleration, δzdDefinite value is latched for same period angular difference.
Entire asynchronous switch-on process is as shown in Figure 3.
Embodiment 2
The present embodiment provides a kind of control methods of above-mentioned alternating current-direct current mixed connection power distribution network self-healing control system, use as follows
Step:
Step 1: AC distribution net breaks down, and intelligent distributed device and circuit optical fiber longitudinal differential protecting equipment quickly position
Failure is simultaneously isolated, and for intelligent distributed device using optical difference protection as main protection, network topology protection is used as nearly back-up protection,
Overcurrent protection is as remote back-up protection；Soft straight converter station enters fault traversing during simultaneous faults occurs；
Step 2: if exchange side fault location confinement period, soft straight converter station thus smoothly complete fault traversing, due to therefore
Phragma defection cuts off power supply point, and soft straight converter station just enters networking and turns island mode；If soft straight converter station fault traversing failure,
Then can lockout port, adjust operating mode after, put into operation again；
Step 3: if soft straight converter station networking turns isolated island success, entering overload anticipation, soft remaining end of straight converter station
The sum of memory electric current is less than definite value plus memory electric current before failure point failure when cause for gossip, then by soft straight converter station preferentially to non-event
Hinder region to carry out quickly turning to supply, realizes self-healing；
Step 4: if soft straight converter station networking turns isolated island failure or out of service for some reason, the contact of load other end power supply
Switch enters overload anticipation, and electric current is remembered plus memory electric current before failure point failure less than fixed in interconnection switch upstream in real time
Value, then intelligent distributed combined floodgate interconnection switch carries out quickly turning to supply to non-faulting region, realizes self-healing.
Entire self-healing control and overload pre-judging method are as shown in Figure 1.
The above examples only illustrate the technical idea of the present invention, and this does not limit the scope of protection of the present invention, all
According to the technical idea provided by the invention, any changes made on the basis of the technical scheme each falls within the scope of the present invention
Within.
Claims (6)
1. a kind of alternating current-direct current mixed connection power distribution network self-healing control system, including intelligent distributed device, circuit optical fiber longitudinal differential protection dress
It sets and soft straight tuning controller, which is characterized in that
The intelligent distributed device is mounted on the switchyard and looped network case of AC distribution net, the circuit optical fiber longitudinal differential protection dress
The outlet switch for being mounted on substation and soft straight converter station is set, the soft straight tuning controller is mounted on soft straight converter station；Intelligence
Distributed devices are completed to exchange the fault location isolation of side with circuit optical fiber longitudinal differential protecting equipment, while being transmitted by optical-fibre channel
Busbar voltage realizes asynchronous switch-on；Intelligent distributed device and soft straight tuning controller are realized by GOOSE real time interaction information
The rapidly self-healing in non-faulting region.
2. alternating current-direct current mixed connection power distribution network self-healing control system according to claim 1, which is characterized in that realize asynchronous switch-on
The step of it is specific as follows:
Step 1: being transmitted to the busbar voltage data that the circuit optical fiber longitudinal differential protecting equipment of optical fiber side acquires using optical-fibre channel
The circuit optical fiber longitudinal differential protecting equipment of optical fiber opposite side；
Step 2: will receive to side bus voltage data and this side line road equipment for protecting optical fibre longitudinal difference busbar voltage data into
Row synchronization process, synchronization processing method use Sampling interrupt adjusting method or interpolation method；
Step 3: voltage magnitude and phase compensation processing will be carried out to side bus voltage；
Step 4: will treated to side bus voltage as synchronous voltage is supplied to by synchronous, voltage magnitude and phase compensation
Reclosing, remote control close a floodgate or the hand indentured period uses.
3. alternating current-direct current mixed connection power distribution network self-healing control system according to claim 2, which is characterized in that the line of route two sides
Road equipment for protecting optical fibre longitudinal difference does not configure dedicated route PT, and synchronous voltage carries out route opposite side by existing optical-fibre channel
Busbar voltage transmitting.
4. alternating current-direct current mixed connection power distribution network self-healing control system according to claim 2, which is characterized in that the step 2
The Sampling interrupt adjusting method process that synchronization process uses is as follows: 1) calculating optical-fibre channel transmission delay t1 using ping-pong procedure；2)
Sending side is recorded, from voltage data sampling time t2 to the time interval t4 of voltage data sending time t3；3) in receiving side
The voltage data received is stamped into local markers t5；4) time receiving mark t5 is docked according to t1 the and t4 time to retract, obtain opposite side
T6 at the time of sampling instant is under this side time system；5) local busbar voltage sampling time t7 is recorded, compares t6's and t7
Time difference △ t；6) sampling instant of adjustment circuit optical fiber longitudinal differential protecting equipment wherein side, so that △ t levels off to 0.
5. alternating current-direct current mixed connection power distribution network self-healing control system according to claim 2, which is characterized in that the step 2
The interpolation method process that synchronization process uses is as follows: 1) calculating optical-fibre channel transmission delay Tdly using ping-pong procedure；2) route light
Fine longitudinal differential protecting equipment receives the data frame from optical-fibre channel, and the sampled data parsed from data frame is stored in caching
In, while Trecv at the time of data frame head reaches is recorded, parsing obtains sampling and sends delay time Tgap_ from data frame
st；3) delay time is sent according to data frame arrival time, sampling and channel transfer postpones, it is corresponding to calculate the frame sampling data
Sampling instant t1=Trecv-Tgap_st-Tdly under local system time system, and the moment is stored in caching, while from
The analog sampled data and sampling markers that local A/D sampling channel is read out also are stored in data buffer storage；4) in data buffer storage
In, either the data that transmit of local data or receiving channel, all record have the sampling instant corresponded under current system, adopt
First-order linear interpolation is done with Lagrange's interpolation algorithm, since interpolation point is in the same time, so the sampled data that interpolation goes out is also
Synchronous, it is used for asynchronous switch-on.
6. the control method of any one of the claim 1-5 alternating current-direct current mixed connection power distribution network self-healing control system, which is characterized in that
Comprising steps of
Step 1: AC distribution net breaks down, intelligent distributed device and the quick positioning failure of circuit optical fiber longitudinal differential protecting equipment
And be isolated, for intelligent distributed device using optical difference protection as main protection, network topology protection is used as nearly back-up protection, overcurrent
Protection is used as remote back-up protection；Soft straight converter station enters fault traversing during simultaneous faults occurs；
Step 2: if exchange side fault location confinement period, soft straight converter station thus smoothly complete fault traversing, due to failure every
Defection cuts off power supply point, and soft straight converter station just enters networking and turns island mode；If soft straight converter station fault traversing failure, can
Lockout port puts into operation again after adjusting operating mode；
Step 3: if soft straight converter station networking turns isolated island success, entering overload anticipation, soft remaining port of straight converter station is real
When remembers the sum of electric current, and plus before failure point failure, memory electric current is less than definite value, then by soft straight converter station preferentially to non-faulting area
Domain carries out quickly turning to supply, and realizes self-healing；
Step 4: if soft straight converter station networking turns isolated island failure or out of service for some reason, the interconnection switch of load other end power supply
Overload anticipation is entered, interconnection switch upstream remembers electric current in real time and is less than definite value plus memory electric current before failure point failure, then
Intelligent distributed combined floodgate interconnection switch carries out quickly turning to supply to non-faulting region, realizes self-healing.
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