CN106229996A - A kind of system realizing the operation of SVG device multi-machine parallel connection and control method thereof - Google Patents
A kind of system realizing the operation of SVG device multi-machine parallel connection and control method thereof Download PDFInfo
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- CN106229996A CN106229996A CN201610676374.4A CN201610676374A CN106229996A CN 106229996 A CN106229996 A CN 106229996A CN 201610676374 A CN201610676374 A CN 201610676374A CN 106229996 A CN106229996 A CN 106229996A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00019—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using optical means
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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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/10—Flexible AC transmission systems [FACTS]
-
- 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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/70—Smart grids as climate change mitigation technology in the energy generation sector
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/22—Flexible AC transmission systems [FACTS] or power factor or reactive power compensating or correcting units
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/124—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wired telecommunication networks or data transmission busses
Abstract
The present invention discloses a kind of system realizing the operation of SVG device multi-machine parallel connection and control method thereof, this system includes multiple stage SVG device, every SVG device is configured with the fiber port being respectively used to receive, send optical signal a pair, for being sequentially connected in series by fiber port and two interconnective ring topologies of SVG device of head and the tail are to constitute optical fiber ring network between each SVG device, the reactive power that in each SVG device, main frame is compensated to remaining by optical fiber ring network transmission control instruction needed for machine, control output；According to the power of required compensation, this control method is determined that one carries out power back-off for the unified distribution coefficient without the distribution of work, each SVG device according to unified distribution coefficient and rated output capacity in real time by the SVG device being configured to main frame.The present invention is capable of multiple stage SVG device fast synergistic and runs, and have that simple in construction, capacity of resisting disturbance be strong, the operation stability of system and redundancy advantages of higher.
Description
Technical field
The present invention relates to electric and electronic technical field, particularly relate to one realize SVG (Static Var Generator,
Static reacance generator) device multi-machine parallel connection run system and control method.
Background technology
Reactive power compensator is as one of device important in field of power electronics, it is often necessary to face the feelings carrying out dilatation
Condition, needs to increase production capacity along with the lifting of benefit such as enterprise so that bearing power can increase accordingly, at this moment needs existing electricity
Line of force road carries out dilatation with transformation and upgrade, and if bearing power increases and carries out circuit dilatation, reactive power compensator then needs to expand
Appearance could meet requirement；It addition, developing rapidly along with generation of electricity by new energy industries such as current wind-powered electricity generation, photovoltaics, a large amount of wind-powered electricity generations, photovoltaic
Power station is connected to the grid, and part wind-powered electricity generation, photovoltaic plant are built by separate periods, and the later stage is as increased generating capacity, it is also desirable to idle benefit
Repay device and carry out dilatation.For realizing reactive power compensator dilatation, if original reactive power compensator being discarded and again buying
The device of more capacity, the most original utilization ratio of device will be substantially reduced, and economically be also subject to loss.Therefore to improve original
The utilization rate of device and economic benefit, optimal case is exactly the reactive power compensator at the corresponding compensation capacity of later stage increase, by many
Table apparatus parallel running realizes dilatation.
Static reacance generator SVG (Static Var Generator, static reacance generator) device is due in response
Speed, stablize line voltage, reduce system loss, increase transmittability, improve the transient voltage limit, reduce harmonic wave and minimizing and account for
The many-side such as ground area has superior performance, has the most been widely used in all trades and professions, has therefore realized SVG device through transport
Row is for needing the industries such as the enterprise of dilatation, generation of electricity by new energy the most significant.Realize the design that multiple stage SVG device is in parallel
In mainly include following two aspect contents: one is the mode of SVG device multi-machine parallel connection, two be SVG device in parallel without the distribution of work
Method.Realizing in the scheme that SVG device is in parallel at present, be primarily present two kinds of parallel waies, a kind of is that the mode that employing communicates will
Multiple stage SVG device couples together, and it is logical that the mode of communication is mainly 485 bus communications, CAN, ethernet communication and optical fiber
Letters etc., idle distribution method is all generally then by the reactive power compensated needed for Framework computing, is then calculated by certain distribution
Method calculates the idle instruction of the required output of every SVG, and the mode through communicating is sent to every SVG device and controls to perform；Other one
Planting is not set up communication connection between each SVG device, without each being calculated required compensation by every SVG device during the distribution of work
Reactive power, calculates the reactive power of required output by certain algorithm.
In the above-mentioned scheme realizing SVG device parallel running, when using 485 interface communications, CAN, its communication speed
Relatively slow and capacity of resisting disturbance is more weak；Although use ethernet communication communication speed very fast, but under High Voltage electromagnetic field environment easily
Be disturbed, poor real；The scheme communication speed of employing fiber optic communication is fast and capacity of resisting disturbance strong, but is currently based on fiber optic communication
SVG device parallel arrangement in be typically by main frame with from machine, from machine with between machine, be required for optical fiber be connected, thus parallel connection platform
Number is the most, and required optical fiber way is the most so that connected mode is complicated, information processing capacity is big and interconnected communication system is multiple
Miscellaneous, carry out fiber optic communication even with the type of attachment of one-to-many, i.e. connected by main frame each from machine, do not set up mutually between machine
Connecting, but when main frame breaks down, cannot switch to main frame from machine, at this moment whole system all cannot work, the redundancy of system
Property is poor.For the idle method of salary distribution, use and the SVG parallel way of communication mode connection typically requires the SVG dress judging to put into
After putting quantity, or the capacity of the quantity of judgement input SVG device and Ge Tai SVG device, just can draw each after calculating diverting coefficient
The idle instruction of SVG device, the method for salary distribution that it is idle is complicated；And the parallel way of communication connection is not set up each SVG device
In, the voltage and current signal without then needing each SVG device to gather bus respectively during the distribution of work calculates required compensation power, by
Sampling in the AD of each SVG device and follow the tracks of regulation asynchronous, calculate idle has difference, when loading Rapid Variable Design
It is likely to result in the idle in-fighting of the compensation of each device, thus this kind of idle method of salary distribution also can cause the idle concussion of bus.
Summary of the invention
The technical problem to be solved in the present invention is that the technical problem existed for prior art, and the present invention provides one
Kind of simple in construction, be capable of fast synergistic run and capacity of resisting disturbance is strong, the operation stability of system and redundancy high
Realize system and control method thereof that SVG device multi-machine parallel connection runs.
For solving above-mentioned technical problem, the technical scheme that the present invention proposes is:
A kind of system realizing the operation of SVG device multi-machine parallel connection, including multiple stage SVG device, every described SVG device configuration
There is the fiber port being respectively used to receive, send optical signal a pair, be by described fiber port between each described SVG device
It is sequentially connected in series and two interconnective ring topologies of SVG device of head and the tail are to constitute optical fiber ring network, each described SVG device
In be configured to the SVG device of main frame and be configured to the SVG device from machine by described optical fiber ring network transmission control instruction to remaining, control
The required reactive power compensated of system output.
Further improvement as present system: the control system of described SVG device includes for controlling reactive power
The master board of output and the data volume collection plate being connected with described master board respectively, analog acquisition plate, SVG unsteady flow
Device, described fiber port is arranged in described master board, is configured to analog quantity collection plate difference in the described SVG device of main frame
Access voltage signal and the current signal of power system points of common connection.
Further improvement as present system: at least two described SVG device be used for gathering power system public
The voltage transformer pt of junction point voltage signal and for gathering the current transformer of power system points of common connection current signal
CT connects.
The present invention further provides the control method utilizing said system, step includes:
1) any one the described SVG dress that can collect the voltage of power system points of common connection, current signal is configured
It is set to main frame, remaining SVG device for from machine；
2) described step 1) in be configured to the SVG device of main frame in real time according to the control target of power system points of common connection
Value calculates and required compensates power, by required compensation power determine one for the unified distribution coefficient without the distribution of work, and as controlling
System instruction is transmitted to each the SVG device being configured to from machine by described optical fiber ring network；
3) each SVG device calculates the most required compensation according to described unified distribution coefficient and specified output reactive capability
Power, each SVG device controls to perform power back-off according to respective calculated power.
Further improvement as control method of the present invention: described unified distribution coefficient is reactive power perunit value Qref-pu,
Wherein-1.0≤Qref-pu≤ 1.0, and Qref-pu=1.0 corresponding the maximum capacitive reactive power of SVG device, Qref-pu=-1.0 is right
Answer the maximum inductive reactive power of SVG device.
Further improvement as control method of the present invention: described step 3) in each the required power compensated of SVG device
It is specially the described reactive power perunit value Q as unified distribution coefficientref-puWith the specified output reactive capability of SVG device it
Between product.
Further improvement as control method of the present invention: described step 2) in regulate the real-time basis of algorithm especially by PI
The control desired value of power system points of common connection and value of feedback calculate the required reactive power perunit value Q compensating powerref-pu
And as described unified distribution coefficient, be adjusted with the control desired value to power system points of common connection.
Further improvement as control method of the present invention: described regulation needed for algorithm calculates by PI compensates the idle of power
Concretely comprising the following steps of power perunit value: using commonly connected as input, the power system of pi regulator for the preset value of control target
The actual value of the control target of point inputs as the feedback quantity of pi regulator, and described pi regulator obtains required after performing PI regulation
Compensate the reactive power perunit value Q of powerref-puOutput.
As the further improvement of control method of the present invention, described step 3) after also include SVG device switching step during fault
Suddenly, concretely comprise the following steps: the malfunction of each SVG device in real-time monitoring system, when there is SVG device and breaking down, sentence
Whether disconnected be that the control system of SVG device breaks down, if it is, the connection of open failure SVG device, and will be with described fault
Two SVG device that SVG device connects are attached removing fault SVG device from optical fiber ring network；Otherwise keep current
Running status.
Further improvement as control method of the present invention: during described fault in SVG device switch step, if it is determined that arrive
When the control system of SVG device breaks down, it is judged that whether fault SVG device is configured to main frame, if it is, by fault SVG
After device removes from optical fiber ring network, reconfigure one and can collect the voltage of power system points of common connection, electric current letter
Number SVG device be that main frame, remaining SVG device are for from machine.
Compared with prior art, it is an advantage of the current invention that:
1) present invention realizes the parallel running of each SVG device, communication based on fiber optic communication by setting up optical fiber ring network
Speed is fast, strong anti-interference performance and reliability high, every SVG device only needs to configure a pair fiber port, connected mode simultaneously
And simple in construction, the complexity effectively reducing system reduces the hardware resource needed for system, energy between each SVG device simultaneously
Enough realize fast synergistic to run and fast dynamic response, thus it is slow to solve communication speed in conventional parallel operating scheme, exists
Concussion that bus is idle and the problem of fluctuation of service；
2) each SVG device in parallel of the present invention is communicated by optical fiber ring network, and configurable any one can collect PCC point
The SVG device of PT and CT signal is main frame, and can quickly switch to it when the SVG device being configured to main frame breaks down
His SVG device and avoid affecting the operation of whole system, flexible configuration, the redundancy and the system that are effectively increased system are run
Reliability；
3) multiple stage SVG device is coupled together by the way of optical fiber ring network communicates by the present invention, in that context it may be convenient to access new
SVG device in optical fiber ring network, be highly convenient for realizing the extending capacity reformation of SVG device；
4) present invention is determined one for nothing by the SVG device being configured to main frame according to power system points of common connection power
The unified distribution coefficient of the distribution of work, is transferred to each the SVG device being configured to from machine, each SVG device by unified distribution coefficient
Only need to determine the most required power compensated according to unified distribution coefficient and specified output reactive capability, it is not necessary to main frame
To every, allocation algorithm is all set from machine SVG device, and main frame SVG device need not obtain the state of each SVG device in parallel,
Each contacts also without setting up between machine SVG device, enormously simplify the idle method of salary distribution of SVG device parallel running,
It is thus possible to realize multiple stage SVG device parallel running easily；
5) by the power compensated needed for power system points of common connection, the present invention determines that partition coefficient carries out idle point in real time
Joining, the exporting change of each SVG device all can be reflected in power system points of common connection realtime power, thus according to working as SVG
Without reconfiguring system when device noncontrol system breaks down, the stability of system is high；
6) present invention further by reactive power perunit value as unified distribution coefficient, each SVG device only needs by nothing
The product of merit power perunit value and respective specified output reactive capability i.e. can determine that the power of required compensation, realizes without the distribution of work
Simple effective；By PI regulation, the present invention determines that reactive power perunit value, PI regulation can quickly regulate output further
In adjustment system, idle the exerting oneself of every SVG device approaches control target, owing to the idle output of any one SVG device becomes
Change in the feedback quantity that all can be reacted to PI regulation, thus when performing without the distribution of work, need not set up between machine SVG device contact,
Realize without the distribution of work simple, and can quickly, effectively carry out power back-off.
Accompanying drawing explanation
Fig. 1 is the structural principle schematic diagram that the present embodiment realizes the system that SVG device multi-machine parallel connection runs.
Fig. 2 be the present embodiment control realization SVG device multi-machine parallel connection run realize principle schematic.
Detailed description of the invention
Below in conjunction with Figure of description and concrete preferred embodiment, the invention will be further described, but the most therefore and
Limit the scope of the invention.
As it is shown in figure 1, the present embodiment realize SVG device multi-machine parallel connection run system include multiple stage SVG device (SVG1～
SVGn), every SVG device be configured with a pair be respectively used to receive, send optical signal fiber port (optical fiber send port TX,
Optical fiber receiving port RX), for being sequentially connected in series by fiber port and two SVG of head and the tail are interconnective between each SVG device
Ring topology is to constitute optical fiber ring network, and optical fiber ring network is specifically sent port TX even by the optical fiber of First SVG device SVG1
The optical fiber receiving port RX being connected to second SVG device SVG2 (can be from any one SVG device as initial company during actual connection
Contact), the optical fiber of second SVG device SVG2 sends port TX and is connected to the optical fiber receiving port of the 3rd SVG device SVG3
RX, the rest may be inferred, until the optical fiber of (n-1)th SVG device SVGn-1 sends port TX and is connected to n-th SVG device SVGn
Optical fiber receiving port RX, the optical fiber of last (n-th) SVG device SVGn sends port TX and First SVG device simultaneously
The optical fiber receiving port RX of SVG1 connects, and forms the loop configuration of Guan Bi；In each SVG device, it is configured to the SVG device of main frame
It is configured to the SVG device from machine by optical fiber ring network transmission control instruction to remaining, and is configured to the SVG device from machine and passes through
Optical fiber ring network uploads status information, controls the required reactive power compensated of output.
The present embodiment communication speed based on fiber optic communication is fast, strong anti-interference performance and reliability high, simultaneously because pass through
Multiple stage SVG device is set up optical fiber ring network and is communicated, and every SVG device only needs to configure a pair fiber port, each SVG device
Between connected mode simple, it is not necessary to setting up special communication network, the complexity effectively reducing system reduces system simultaneously
Required hardware resource；And due to can Fast Transferring Information by optical fiber ring network so that multiple stage SVG device output idle defeated
Go out and can act in agreement, it is thus possible to realize multiple stage SVG device fast synergistic and run and fast dynamic response, solve tradition also
In connection operating scheme, communication speed is slow, there is the problems such as the idle concussion of bus and fluctuation of service；It addition, each SVG device
By setting up optical fiber ring network communication, configurable any one can collect PCC (Point of Common Coupling, electric power
System points of common connection) SVG device of voltage and current signal put is main frame, and occurs in the SVG device being configured to main frame
Can quickly switch to other SVG device and avoid affecting the operation of whole system during fault, system flexible configuration, simultaneously energy
Enough it is effectively improved redundancy and the system reliability of operation of system.
The present embodiment realizes the system that SVG device multi-machine parallel connection runs, by multiple stage SVG by the way of optical fiber ring network communicates
Device couples together so that can access new SVG device easily in optical fiber ring network, be highly convenient for realizing SVG device
Extending capacity reformation.
As it is shown in figure 1, the hardware resource of each SVG device is identical in the present embodiment, the control system of SVG device is specifically wrapped
Include the master board for controlling reactive power output and the digital data acquisition plate, the analog quantity that are connected with master board respectively are adopted
Collection plate, SVG current transformer, fiber port is arranged in master board, is configured to analog quantity collection plate in the SVG device of main frame and accesses
The voltage signal of power system points of common connection (PCC), current signal.Master board is required idle specifically for calculating PCC point
Power, control SVG current transformer export the reactive current specified；Analog acquisition plate is used for gathering every simulation such as voltage, electric current
Amount, sends master board to after being AD converted；Digital quantity acquisition device is used for gathering digital quantity state and sending main control to
Plate, accepts the instructions such as combined floodgate that master board issues, tripping operation, the actuating of relay simultaneously.The control system of SVG device is the most also wrapped
Include control power supply and all kinds of low-voltage relays etc..
It is (main that any one of the present embodiment concrete configuration can collect PCC point voltage, the SVG device of current signal is main frame
Machine SVG), remaining SVG device be then from machine (from machine SVG), main frame SVG gathered the voltage of PCC point by analog acquisition plate
And current signal, the reactive power that output to master board compensates needed for calculating, and send control by optical fiber transmission port TX
Instruction, control instruction is sent to next SVG device by a upper SVG device so that control instruction is transmitted extremely through optical fiber ring network
Each the SVG device being configured to from machine；Obtain control instruction from the master board of machine SVG by optical fiber receiving port RX, control
Compensation power needed for output.Calculate the required power that compensates of PCC point by main frame SVG, then send control instruction through optical fiber ring network
To each from machine SVG, each SVG device fast synergistic can be realized with fast-response control instruction and run, it is ensured that system is run
Stability.
Compensate power owing to said system needing calculate according to PCC point voltage, current status, thus the present embodiment is concrete
By be used for gathering the voltage transformer pt of PCC point voltage signal and be used for gathering the Current Transmit of PCC current signal even
The SVG device connect is configured to main frame.In the present embodiment, further to rare two SVG device be used for gathering PCC point electricity
Press the voltage transformer pt of signal and connect for gathering the Current Transmit of PCC current signal so that when the control of main frame SVG
During system jam processed, an other SVG device conduct that can gather PCC point voltage and current signal can be switched fast
Main frame runs, it is to avoid whole system is stopped transport.
In the present embodiment, utilizing the control method of said system, step includes:
1) configure any one can collect the voltage of power system points of common connection, the SVG device of current signal is
Main frame, remaining SVG device are from machine, and every is configured with a unique address number from machine；
2) step 1) in be configured to the SVG device of main frame in real time according to the control desired value meter of power system points of common connection
Calculate required compensation power, required compensation power determine one for the unified distribution coefficient without the distribution of work, the most each SVG device institute
Corresponding partition coefficient is consistent, and is transmitted to each the SVG device being configured to from machine by optical fiber ring network as control instruction；
3) each SVG device calculates the most required merit compensated according to unified distribution coefficient and specified output reactive capability
Rate, each SVG device controls to perform power back-off according to respective calculated power.
The present embodiment, by the voltage of main frame SVG Real-time Collection PCC point, current signal, obtains the voltage of PCC point, idle merit
Rate, power factor, according to the control model meter set by the control desired value of voltage, reactive power or power factor and SVG
Calculate the required power that compensates of PCC point, then by required compensation power determine a unified distribution coefficient for without the distribution of work, by this unification
Partition coefficient as control instruction uniform transmission give each from machine SVG, each SVG device (main frame SVG and from machine SVG) needs
Determine according to default operation method (such as product calculation) according to unified distribution coefficient and respective specified output reactive capability
The required power compensated, it is achieved each SVG device parallel running.Said process both need not main frame SVG and obtained each in parallel
The state of SVG device, such as SVG device quantity in parallel, the rated capacity of every SVG device or every SVG feedback reality output
Idle, it is not necessary to host apparatus all arranges allocation algorithm to every from machine SVG device, and each is not required between machine SVG equally
Set up contact, need not mutually obtain respective state, thus enormously simplify the idle method of salary distribution of SVG parallel running,
Such that it is able to realize the parallel running of multiple stage SVG device easily.
The present embodiment is determined unified distribution coefficient by the required power compensated of PCC point in real time, and the output of each SVG device becomes
Change and all can be reflected in power system points of common connection realtime power, thus according to above-mentioned control method, when SVG device non-controlling
Also without reconfiguring system during system jam, the stability of system and reliability are high.
In the present embodiment, unified distribution coefficient is specially reactive power perunit value Qref-pu, wherein-1.0≤Qref-pu≤
1.0, and Qref-pu=1.0 corresponding the maximum capacitive reactive power of SVG device, Qref-puThe maximum sense of=-1.0 corresponding SVG device
Property reactive power.By reactive power perunit value Qref-puAs unified distribution coefficient, main frame SVG and each have only to from machine SVG
Required compensation power is i.e. may determine that according to respective specified output reactive capability.In the present embodiment, step 3) in each SVG device
The required power compensated is specially the reactive power perunit value Q as unified distribution coefficientref-puSpecified output with SVG device
Product between reactive capability.When specifically including SVG1, SVG2 and SVG3 totally 3 SVG device such as said system, wherein SVG1
Be configured to main frame, SVG2 and SVG3 is configured to from machine, and SVG1 rated capacity is 10MVar, SVG2 rated capacity 8MVar, SVG1
Rated capacity 6MVar, Qref-pu=0.5, then, after sending instructions under SVG1, SVG1 output capacitive reactive power is 0.5*10=5MVar,
SVG2 output capacitive reactive power be 0.5*8=4MVar, SVG3 output capacitive reactive power be 0.5*6=3MVar, amount to output capacitive without
Merit 12MVar.
In the present embodiment, step 2) in especially by PI regulation algorithm in real time according to the control of power system points of common connection
Desired value and value of feedback calculate the required reactive power perunit value Q compensating powerref-puAnd as unified distribution coefficient, with right
The control desired value of power system points of common connection carries out PI regulation, wherein controls the desired value control model according to SVG device
Can be voltage, reactive power or power factor, i.e. realize the voltage to PCC point, reactive power or the regulation of power factor.
The present embodiment is calculated concretely comprising the following steps of the required reactive power perunit value compensating power by PI regulation algorithm: will control target
Preset value as the input of pi regulator, the control target actual value of power system points of common connection as the feedback of pi regulator
Amount input, pi regulator obtains the required reactive power perunit value Q compensating power after performing PI regulationref-puOutput, wherein controls
Target is the voltage of PCC point, reactive power or power factor.
During as in figure 2 it is shown, the present embodiment control realization SVG device multi-machine parallel connection runs, specifically by the control of every SVG device
System processed, first according to the setting of master/slave machine, selects different control operational mode (main frame operational mode or run mould from machine
Formula)；When being configured to main frame, main frame SVG gathers the voltage and current signal of PCC point by collection of simulant signal plate, calculates
The control target actual value (such as power factor value) of PCC point, is arranged default control desired value (such as predetermined power factor value)
For input parameter value ref of pi regulator, using calculated control target actual value (i.e. the current feedback value of PCC point) as
The feedback quantity feedback of pi regulator, by being calculated the reactive power perunit value Q of required compensation after pi regulatorref-pu,
It is transferred to each from machine SVG by optical fiber ring network；Main frame SVG is by reactive power perunit value Qref-puBe converted to reactive current reference
Value IrefAfter, through current inner loop controlling unit, main circuit output reactive current ISVGTo electrical network, thus according to reactive power mark one
Value Qref-puControl main frame SVG output reactive power；When being configured to from machine, have only to be obtained by optical fiber ring network communication from machine SVG
Take the reactive power perunit value Q that main frame SVG issuesref-pu, control to export corresponding reactive current ISVGWith the required idle merit of output
Rate.
The present embodiment determines reactive power perunit value Q by PI regulationref-pu, each SVG device is according to this reactive power mark
One value Qref-puDetermining the most corresponding required power compensated, under this idle allocation model, PI regulation can quickly regulate defeated
Output, i.e. reactive power perunit value Qref-pu, carry out the idle of every SVG device in adjustment system and exert oneself, regulate PCC point with this
Reactive power is to approaching control target, owing to the idle exporting change of any one SVG device all can be reacted to the anti-of PI regulation
In feedback amount feedback, thus need not build between machine SVG device when the above-mentioned control method of the present embodiment performs without the distribution of work
Vertical contact, it is not required that mutually obtain respective state, the idle method of salary distribution is simple, and can quickly, effectively carry out power back-off.
The most in other embodiments, it is also possible to use other regulation algorithms to calculate reactive power perunit value Qref-puApproach PCC point
Control target.
In the present embodiment, step 3) after also include SVG device switch step during fault, concretely comprise the following steps: monitor system in real time
, when there is SVG device and breaking down in the malfunction of each SVG device in system, it may be judged whether is the control system of SVG device
Break down, if it is, the connection of open failure SVG device, and two SVG device being connected with fault SVG device are carried out
Connect so that fault SVG device is removed from optical fiber ring network；Otherwise keep current operating conditions.By each in real-time monitoring system
The malfunction of platform SVG device, to excise fault SVG device in time, it is ensured that system when SVG device control system breaks down
Properly functioning, and due to connected mode based on optical fiber ring network, it is possible to achieve the fast and easy of SVG device puts into operation.
In the present embodiment, during fault in SVG device switch step, if it is determined that there is event in the control system to SVG device
During barrier, it is judged that whether fault SVG device is configured to main frame, if it is, after fault SVG device is removed from optical fiber ring network,
Reconfigure one can collect power system points of common connection (PCC) voltage, the SVG device of current signal is main frame, it
Remaining SVG device is from machine.Each SVG device is communicated by optical fiber ring network, then when main frame SVG device fault, and can be quick
Switching other SVG device is main frame, it is ensured that system is properly functioning.
Concrete, when the present embodiment system performs above-mentioned control method, when breaking down according to the difference of host and slave processors pattern
Can be divided into:
Break down if from machine SVG, then:
1. if the part from machine SVG in addition to control system there occurs that fault causes shutting down, now from machine SVG's
Control system can normally work, and optical fiber ring network communication is normal, thus break down can't affect whole system from machine SVG
Run；When using above-mentioned control method based on PI regulation, although now system can reduce suddenly one without work output (i.e. event
Hinder the idle output from machine SVG), but main frame SVG can quickly detect this change by the feedback quantity of PCC point, is regulated by PI
Device can adjust rapidly, controls the increase output of other SVG device idle idle to the output regulating whole system with this, the most permissible
Reach to control the purpose of target, it is achieved quickly soft handover；
2. if from the control system of machine SVG there occurs fault cause optic fibre of looped network cannot proper communication, then stop transport institute
There is SVG device, fault SVG device is removed from optical fiber ring network network, again recover optical fiber ring network communication and can start all
SVG device is run, it is thus possible to realize quickly re-running of system after a failure.Removing SVG device will be with fault SVG device
Two SVG device connected are connected, if such as there occurs fault from machine SVG3, only need to receive being originally connected to SVG3 optical fiber
The optical fiber receiving terminal RX of SVG4 received by the optical fiber of end RX.
Break down if main frame SVG, then:
1. if main frame SVG part in addition to control system there occurs that fault causes SVG device to be shut down, now main frame
The control system of SVG can normally work, and optical fiber ring network communication is normal, and the main frame SVG broken down can't affect package unit
Operation, although now main frame SVG device is shut down and no longer exported idle, in control program, automatic tracking and compensating program is the most permissible
Run；When using above-mentioned control method based on PI regulation, this change can be quickly detected by the feedback quantity of PCC point, pass through
Pi regulator can adjust rapidly output valve Qref-pu, the output regulating package unit with this is idle, still can reach to control mesh
Target purpose, it is achieved quickly soft handover.
2. if the control system of main frame SVG there occurs fault cause optical fiber ring network cannot proper communication, then stop transport institute
There is SVG device, and fault SVG device is removed from optical fiber ring network network, reconfigure after again recovering optical fiber ring network communication
Main frame, it is possible to realize quickly putting into operation after hostdown.
Above-mentioned simply presently preferred embodiments of the present invention, not makees any pro forma restriction to the present invention.Although the present invention
Disclosed above with preferred embodiment, but it is not limited to the present invention.Therefore, every without departing from technical solution of the present invention
Content, according to the technology of the present invention essence to any simple modification made for any of the above embodiments, equivalent variations and modification, all should fall
In the range of technical solution of the present invention protection.
Claims (10)
1. one kind realizes the system that SVG device multi-machine parallel connection runs, it is characterised in that include multiple stage SVG device, every described SVG
Device is configured with the fiber port being respectively used to receive, send optical signal a pair, is by described between each described SVG device
Fiber port is sequentially connected in series and two interconnective ring topologies of SVG device of head and the tail are to constitute optical fiber ring network, each institute
Stating in SVG device, the SVG device being configured to main frame is configured to from machine to remaining by described optical fiber ring network transmission control instruction
SVG device, and be configured to upload status information from the SVG device of machine by described optical fiber ring network, control the required compensation of output
Reactive power.
The system realizing the operation of SVG device multi-machine parallel connection the most according to claim 1, it is characterised in that: described SVG device
Control system include the master board for controlling reactive power output and the data that are connected respectively with described master board
Amount collection plate, analog acquisition plate, SVG current transformer, described fiber port is arranged in described master board, is configured to main frame
In described SVG device, analog quantity collection plate is respectively connected to voltage signal and the current signal of power system points of common connection.
The system realizing the operation of SVG device multi-machine parallel connection the most according to claim 1 and 2, it is characterised in that: at least two
Described SVG device with for gathering the voltage transformer pt of power system points of common connection voltage signal and for gathering power train
The Current Transmit of system points of common connection current signal connects.
4. utilize the control method of system described in any one in claim 1～3, it is characterised in that step includes:
1) configure any one can collect the voltage of power system points of common connection, the described SVG device of current signal is
Main frame, remaining SVG device are from machine；
2) described step 1) in be configured to the SVG device of main frame in real time according to the control desired value meter of power system points of common connection
Calculate and required compensate power, by required compensation power determine one for the unified distribution coefficient without the distribution of work, and refer to as control
Make and being transmitted to each the SVG device being configured to from machine by described optical fiber ring network；
3) each SVG device calculates the most required merit compensated according to described unified distribution coefficient and specified output reactive capability
Rate, each SVG device controls to perform power back-off according to respective calculated power.
Control method the most according to claim 4, it is characterised in that: described unified distribution coefficient is reactive power perunit value
Qref-pu, wherein-1.0≤Qref-pu≤ 1.0, and Qref-pu=1.0 corresponding the maximum capacitive reactive power of SVG device, Qref-pu=-
The maximum inductive reactive power of 1.0 corresponding SVG device.
Control method the most according to claim 5, it is characterised in that: described step 3) in each SVG device is required compensates
Power be specially as distribute unitedly coefficient described reactive power perunit value Qref-puSpecified output with SVG device is idle
Product between capacity.
7. according to the control method described in claim 5 or 6, it is characterised in that described step 2) in especially by PI regulation calculate
Method is in real time according to control desired value and the required reactive power compensating power of value of feedback calculating of power system points of common connection
Perunit value Qref-puAnd as described unified distribution coefficient, be adjusted with the control desired value to power system points of common connection.
Control method the most according to claim 7, it is characterised in that: described by PI regulation algorithm calculating required compensation power
Reactive power perunit value Qref-puConcretely comprise the following steps: using control target preset value as the input of pi regulator, power train
The actual value of the control target of system points of common connection inputs as the feedback quantity of pi regulator, and described pi regulator performs PI regulation
After obtain the required reactive power perunit value Q compensating powerref-puOutput.
9. according to the control method described in any one in claim 4～6, it is characterised in that described step 3) after also include
SVG device switch step during fault, concretely comprises the following steps: the malfunction of each SVG device in real-time monitoring system, works as existence
When SVG device breaks down, it may be judged whether be that the control system of SVG device breaks down, if it is, open failure SVG device
Connection, and two SVG device being connected with described fault SVG device are attached with by fault SVG device from fiber optic loop
Net removes；Otherwise keep current operating conditions.
Control method the most according to claim 9, it is characterised in that: during described fault in SVG device switch step, as
Fruit determines the control system of SVG device when breaking down, it is judged that whether fault SVG device is configured to main frame, if it is, will
After fault SVG device removes from optical fiber ring network, reconfigure the voltage that can collect power system points of common connection,
The SVG device of current signal is that main frame, remaining SVG device are for from machine.
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