CN106229996B - A kind of system and its control method for realizing the operation of SVG device multi-machine parallel connection - Google Patents
A kind of system and its control method for realizing the operation of SVG device multi-machine parallel connection Download PDFInfo
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- CN106229996B CN106229996B CN201610676374.4A CN201610676374A CN106229996B CN 106229996 B CN106229996 B CN 106229996B CN 201610676374 A CN201610676374 A CN 201610676374A CN 106229996 B CN106229996 B CN 106229996B
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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
-
- 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 and its control method for realizing the operation of SVG device multi-machine parallel connection, the system includes more SVG devices, every SVG device is respectively used to receive, send the fiber port of optical signal configured with a pair, between each SVG device for be sequentially connected in series by fiber port and head and the tail two SVG device ring topologies interconnected to constitute optical fiber ring network, host transmits control instruction to remaining slave, the reactive power of compensation needed for control output by optical fiber ring network in each SVG device；The control method determines one for the unified distribution coefficient without the distribution of work according to the power of required compensation in real time by the SVG device for being configured to host, and each SVG device carries out power compensation according to unified distribution coefficient and rated output capacity.The present invention can be realized more SVG device fast synergistic operations, and have many advantages, such as that simple structure, the operation stability of strong antijamming capability, system and redundancy are high.
Description
Technical field
The present invention relates to power electronics field more particularly to a kind of realization SVG (Static Var Generator,
Static reactive generator) device multi-machine parallel connection operation system and its control method.
Background technique
Reactive power compensator is as one of device important in field of power electronics, it is often necessary to face the feelings for carrying out dilatation
Condition, so that bearing power can be increase accordingly, is at this moment needed to existing electricity such as enterprise as the promotion of benefit needs to increase production capacity
Line of force road carries out dilatation with transformation and upgrade, and if bearing power increases and progress route dilatation, reactive power compensator need to expand
Rong Caineng is met the requirements；In addition, with the rapid development of the generations of electricity by new energy industry such as current wind-powered electricity generation, photovoltaic, 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 period is if you need to increase power generation capacity, it is also desirable to idle benefit
It repays device and carries out dilatation.To realize reactive power compensator dilatation, bought again if original reactive power compensator is discarded
The device of larger capacity, then original utilization ratio of device will substantially reduce, and economically be also subject to loss.Therefore original in order to improve
The utilization rate and economic benefit of device, optimal case is exactly to increase the reactive power compensator of corresponding compensation capacity in the later period, by more
Dilatation is realized in platform device parallel running.
Static reactive generator SVG (Static Var Generator, static reactive generator) device is due to responding
Speed, stable network voltage, reduction system loss, increase transmittability, the raising transient voltage limit, reduction harmonic wave and reduction account for
Ground area etc. is many-sided to have superior performance, has been widely used in all trades and professions at present, therefore realize SVG device and through transport
Row is all of great significance for industries such as the enterprise, the generations of electricity by new energy that need dilatation.Realize the design of more SVG device parallel connections
In mainly include following two aspects content: first is that the mode of SVG device multi-machine parallel connection, second is that SVG device in parallel without the distribution of work
Method.In the scheme for realizing SVG device parallel connection at present, two kinds of parallel ways are primarily present, one is will by the way of communication
More SVG devices connect, and the mode of communication is mainly that 485 bus communications, CAN bus, ethernet communication and optical fiber are logical
Letter etc., idle distribution method are usually all then the reactive powers of the compensation as needed for Framework computing, are then calculated by certain distribution
Method calculates the reactive command exported needed for every SVG, and the mode through communicating is transmitted to every SVG device control and executes；Other one
It kind is that communication connection is not established between each SVG device, compensation needed for when no distribution of work is respectively calculated by every SVG device
Reactive power, the reactive power exported needed for being calculated by certain algorithm.
In the scheme of above-mentioned realization SVG device parallel running, when using 485 interface communications, CAN bus, communication speed
Relatively slow and anti-interference ability is weaker；Although very fast using ethernet communication communication speed, under high pressure strong-electromagnetic field environment easily
Be disturbed, real-time it is poor；The fast and strong antijamming capability using the scheme communication speed of fiber optic communication, but currently based on fiber optic communication
SVG device parallel arrangement in be usually by requiring optical fiber connection, thus platform in parallel between host and slave, slave and slave
Number is more, and required optical fiber number is also more, so that connection type is complicated, information processing capacity is big and interconnected communication system is multiple
It is miscellaneous, fiber optic communication is carried out even with one-to-many type of attachment, i.e., is connected by host and is not established mutually between each slave, slave
Connection, but when host breaks down, slave can not be switched to host, and at this moment whole system can not all work, the redundancy of system
Property is poor.For the idle method of salary distribution, filled using the SVG for usually requiring judgement investment in the SVG parallel way of communication mode connection
Quantity is set, or is judged after putting into the quantity of SVG device and the capacity of Ge Tai SVG device, can just be obtained respectively after calculating diverting coefficient
The reactive command of SVG device, the idle method of salary distribution are complicated；And the parallel way of communication connection is not established in each SVG device
In, when no distribution of work, needs each SVG device to acquire the voltage and current signal of bus respectively then to compensate power needed for calculating, by
Adjusted and asynchronous in the AD sampling and tracking of each SVG device, it is calculated it is idle have difference, in load quickly variation
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 will cause the idle concussion of bus.
Summary of the invention
The technical problem to be solved in the present invention is that, for technical problem of the existing technology, the present invention provides one
Kind structure is simple, can be realized fast synergistic operation and strong antijamming capability, the operation stability of system and redundancy are high
Realize the system and its control method of the operation of SVG device multi-machine parallel connection.
In order to solve the above technical problems, technical solution proposed by the present invention are as follows:
A kind of system for realizing the operation of SVG device multi-machine parallel connection, including more SVG devices, every SVG device configuration
There is a pair of fiber port for being respectively used to receive, send optical signal, is to pass through the fiber port between each SVG device
It is sequentially connected in series and two SVG device ring topologies interconnected of head and the tail is to constitute optical fiber ring network, each SVG device
In be configured to the SVG device of host the SVG device that control instruction is configured to remaining slave, control transmitted by the optical fiber ring network
The reactive power compensated needed for system output.
Further improvement as present system: the control system of the SVG device includes for controlling reactive power
The master board of output and the data volume collection plate being connect respectively with the master board, analog acquisition plate, SVG unsteady flow
Device, the fiber port are arranged in the master board, are configured to analog acquisition plate in the SVG device of host and distinguish
Access the voltage signal and current signal of electric system points of common connection.
Further improvement as present system: at least two SVG devices with for acquire electric system public
The voltage transformer pt of tie point voltage signal and current transformer for acquiring electric system points of common connection current signal
CT connection.
The present invention further provides the control method using above system, step includes:
1) any one SVG dress that can collect the voltage of electric system points of common connection, current signal is configured
It is set to host, remaining SVG device is slave；
2) SVG device of host is configured in the step 1) in real time according to the control target of electric system points of common connection
Value compensates power needed for calculating, and determines that is used for the unified distribution coefficient without the distribution of work by required compensation power, and as control
System instruction is transmitted to each SVG device for being configured to slave by the optical fiber ring network；
3) compensation needed for each SVG device calculates respectively according to the unified distribution coefficient and rated output reactive capability
Power, each SVG device execute power compensation according to the power control that is respectively calculated.
Further improvement as control method of the present invention: the unified distribution coefficient is reactive power per unit value Qref-pu,
Wherein -1.0≤Qref-pu≤ 1.0, and Qref-puThe maximum capacitive reactive power of=1.0 corresponding SVG devices, Qref-pu=-1.0 pairs
Answer the maximum inductive reactive power of SVG device.
Further improvement as control method of the present invention: the power compensated needed for each SVG device in the step 3)
The reactive power per unit value Q specially as unified distribution coefficientref-puWith the rated output reactive capability of SVG device it
Between product.
Further improvement as control method of the present invention: the real-time basis of algorithm is adjusted especially by PI in the step 2)
The reactive power per unit value Q of compensation power needed for the control target value and value of feedback of electric system points of common connection calculateref-pu
And as the unified distribution coefficient, it is adjusted with the control target value to electric system points of common connection.
Further improvement as control method of the present invention: described that the idle of compensation power needed for algorithm calculates is adjusted by PI
The specific steps of power per unit value are as follows: input of the preset value as pi regulator, the electric system for controlling target is commonly connected
The actual value of the control target of point is inputted as the feedback quantity of pi regulator, needed for the pi regulator execution PI is obtained after adjusting
Compensate the reactive power per unit value Q of powerref-puOutput.
As the further improvement of control method of the present invention, SVG device switching step when further including failure after the step 3)
Suddenly, specific steps are as follows: the malfunction of each SVG device is sentenced when breaking down there are SVG device in real-time monitoring system
Whether disconnected be that the control system of SVG device breaks down, if so, disconnecting the connection of failure SVG device, and will be with the failure
Two SVG devices of SVG device connection are attached to remove failure SVG device from optical fiber ring network；Otherwise it keeps current
Operating status.
Further improvement as control method of the present invention: when the failure in SVG device switch step, if it is determined that arriving
When the control system of SVG device breaks down, judge whether failure SVG device is configured to host, if it is, by failure SVG
For device after removing in optical fiber ring network, the voltage of electric system points of common connection, electric current letter can be collected by reconfiguring one
Number SVG device be host, remaining SVG device is slave.
Compared with the prior art, the advantages of the present invention are as follows:
1) present invention realizes the parallel running of each SVG device, the communication based on fiber optic communication by establishing optical fiber ring network
Speed is fast, strong anti-interference performance and high reliablity, while every SVG device only needs to configure a pair of of fiber port, connection type
And structure is simple, hardware resource needed for effectively reducing the complexity of system while reducing system, energy between each SVG device
Enough realize fast synergistic operation and fast dynamic response, communication speed is slow to solve in conventional parallel operating scheme, exists
The problem of concussion that bus is idle and fluctuation of service；
2) present invention each SVG device in parallel is communicated by optical fiber ring network, and can configure any one can collect PCC point
The SVG device of PT and CT signal is host, and can quickly switch to it when the SVG device for being configured to host breaks down
His SVG device and the operation for avoiding influencing whole system, configuration flexibly, effectively increase the redundancy and system operation of system
Reliability；
3) present invention connects more SVG devices in such a way that optical fiber ring network communicates, it may be convenient to which access is new
SVG device into optical fiber ring network, be highly convenient for realize SVG device extending capacity reformation；
4) present invention determines that is used for a nothing according to electric system points of common connection power by the SVG device for being configured to host
Unified distribution coefficient is transferred to each SVG device for being configured to slave, each SVG device by the unified distribution coefficient of the distribution of work
The power compensated needed for only needing to be determined according to unified distribution coefficient and rated output reactive capability respectively, does not need host
Allocation algorithm is all arranged to every slave SVG device, and host SVG device does not need to obtain the state of each SVG device in parallel,
It does not need to establish connection between each slave SVG device yet, enormously simplifies the idle method of salary distribution of SVG device parallel running,
So as to easily realize more SVG device parallel runnings；
5) power of the compensation as needed for electric system points of common connection in real time of the invention determines that distribution coefficient carries out idle point
To match, the output variation of each SVG device can be reflected into electric 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) further by reactive power per unit value as unified distribution coefficient, each SVG device is only needed by nothing the present invention
The product of function power per unit value and respective rated output reactive capability is the power that can determine required compensation, and the no distribution of work is realized
It is simple and effective；The present invention is further adjusted by PI and determines reactive power per unit value, and PI adjusting can quickly adjust output quantity
The idle power output of every SVG device is in adjustment system to approach control target, since the idle output of any one SVG device becomes
Change can all be reacted to PI adjusting feedback quantity in, thus execute without the distribution of work when do not need between slave SVG device establish connection,
The no distribution of work realize it is simple, and can quickly, effectively carry out power compensation.
Detailed description of the invention
Fig. 1 is the principle schematic diagram for the system that the present embodiment realizes the operation of SVG device multi-machine parallel connection.
Fig. 2 is the realization principle schematic diagram that the operation of SVG device multi-machine parallel connection is realized in the present embodiment control.
Specific embodiment
Below in conjunction with Figure of description and specific preferred embodiment, the invention will be further described, but not therefore and
It limits the scope of the invention.
As shown in Figure 1, the present embodiment realize SVG device multi-machine parallel connection operation system include more SVG devices (SVG1~
SVGn), every SVG device configured with a pair be respectively used to receive, send optical signal fiber port (optical fiber sending port TX,
Optical fiber receiving port RX), it is sequentially connected in series by fiber port between each SVG device and two SVG of head and the tail is interconnected
To constitute optical fiber ring network, optical fiber ring network is specifically connected by the optical fiber sending port TX of First SVG device SVG1 ring topology
The optical fiber receiving port RX for being connected to second SVG device SVG2 (can connect when practical connection from any one SVG device as starting
Contact), the optical fiber sending port TX of second SVG device SVG2 is connected to the optical fiber receiving port of third platform SVG device SVG3
RX, and so on, until the optical fiber sending port TX of (n-1)th SVG device SVGn-1 is connected to n-th SVG device SVGn's
Optical fiber receiving port RX, while the optical fiber sending port TX of last (n-th) SVG device SVGn and First SVG device
The optical fiber receiving port RX connection of SVG1, forms the ring structure of closure；In each SVG device, it is configured to the SVG device of host
The SVG device that control instruction is configured to remaining slave is transmitted by optical fiber ring network, and is configured to the SVG device of slave and passes through
Optical fiber ring network uploads status information, the reactive power compensated needed for control output.
Communication speed of the present embodiment based on fiber optic communication be fast, strong anti-interference performance and high reliablity, simultaneously because passing through
More SVG devices are established optical fiber ring network and are communicated, and every SVG device only needs to configure a pair of of fiber port, each SVG device
Between connection type it is simple, without setting up special communication network, effectively reducing the complexity of system while reducing system
Required hardware resource；And due to by optical fiber ring network can Fast Transferring Information so that the output of more SVG devices is idle defeated
It can act in agreement out, it is thus possible to realize more SVG device fast synergistic operations and fast dynamic response, solve tradition simultaneously
Join the problems such as communication speed is slow, there are the idle concussion of bus and fluctuations of service in operating scheme；In addition, each SVG device
By establishing optical fiber ring network communication, can configure any one can collect PCC (Point of Common Coupling, electric power
System points of common connection) point voltage and current signals SVG device be host, and be configured to host SVG device occur
Other SVG devices can quickly be switched to when failure and avoid influence whole system operation, system configuration is flexible, while energy
Enough effectively improve the redundancy and system reliability of operation of system.
The system that the present embodiment realizes the operation of SVG device multi-machine parallel connection, by more SVG in such a way that optical fiber ring network communicates
Device connects, and allows to easily access new SVG device into optical fiber ring network, is highly convenient for realizing SVG device
Extending capacity reformation.
As 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
It includes the master board for controlling reactive power output and the digital data acquisition plate that connect with master board, analog quantity is adopted respectively
Collect plate, SVG current transformer, fiber port is arranged in master board, is configured to analog acquisition plate in the SVG device of host and accesses
Voltage signal, the current signal of electric system points of common connection (PCC).Master board is specifically used for idle needed for calculating PCC point
The specified reactive current of power, control SVG current transformer output；Analog acquisition plate is for every simulation such as collection voltages, electric current
Amount, sends master board to after being AD converted；Digital quantity acquisition device is for acquiring digital quantity state and sending main control to
Plate, while the instruction such as receive combined floodgate, tripping, the actuating of relay that master board issues.The control system of SVG device is specifically also wrapped
Include control power supply and all kinds of low-voltage relays etc..
The present embodiment concrete configuration any one can collect PCC point voltage, the SVG device of current signal is that host is (main
Machine SVG), remaining SVG device be then slave (slave SVG), by host SVG by analog acquisition plate acquire PCC point voltage
And current signal, the reactive power compensated needed for calculating is exported to master board, and control is sent by optical fiber sending port TX
Instruction, control instruction is sent to next SVG device by a upper SVG device, so that control instruction is transmitted to through optical fiber ring network
Each is configured to the SVG device of slave；The master board of slave SVG obtains control instruction, control by optical fiber receiving port RX
Compensation power needed for output.It is calculated by host SVG and compensates power needed for PCC point, then send control instruction through optical fiber ring network
To each slave SVG, it can be instructed with fast-response control and realize each SVG device fast synergistic operation, guarantee system operation
Stability.
Due to needing to calculate compensation power according to PCC point voltage, current status in above system, thus the present embodiment is specific
It will connect with the voltage transformer pt for being used to acquire PCC point voltage signal and the Current Transmit for being used to acquire PCC current signal
The SVG device connect is configured to host.In the present embodiment, further at least two SVG devices with for acquiring PCC point electricity
The voltage transformer pt of pressure signal is connected with the Current Transmit for acquiring PCC current signal, so that working as the control of host SVG
When system jam processed, the other one SVG device conduct that can acquire PCC point voltage and current signals can be switched fast
Host operation, avoids whole system from stopping transport.
In the present embodiment, using the control method of above system, step includes:
1) it configures any one and can collect the voltage of electric system points of common connection, the SVG device of current signal is
Host, remaining SVG device are slave, and every slave is configured with a unique address number；
2) SVG device of host is configured in step 1) in real time according to the control target value meter of electric system points of common connection
Power is compensated needed for calculating, and determines that one is used for the unified distribution coefficient without the distribution of work, i.e., each SVG device institute by required compensation power
Corresponding distribution coefficient is consistent, and is transmitted to each SVG device for being configured to slave by optical fiber ring network as control instruction；
3) function that each SVG device compensates needed for being calculated respectively according to unified distribution coefficient and rated output reactive capability
Rate, each SVG device execute power compensation according to the power control being respectively calculated.
The present embodiment is acquired the voltage of PCC point, current signal by host SVG in real time, obtains voltage, the idle function of PCC point
Rate, power factor, according to control model meter set by the control target value and SVG of voltage, reactive power or power factor
It calculates and compensates power needed for PCC point, then a unified distribution coefficient is determined for no distribution of work, by the unification by required compensation power
As control instruction uniform transmission to each slave SVG, each SVG device (host SVG and slave SVG) needs distribution coefficient
It is determined according to unified distribution coefficient and respective rated output reactive capability according to default operation method (such as product calculation)
The power of required compensation realizes each SVG device parallel running.Both host SVG had not been needed in the above process obtains each of parallel connection
The state of SVG device, SVG device quantity such as in parallel, the rated capacity of every SVG device or every SVG feed back reality output
It is idle, do not need host apparatus and allocation algorithm be all arranged to every slave SVG device, be equally not required between each slave SVG
It establishes connection, need mutually to obtain respective state, thus enormously simplify the idle method of salary distribution of SVG parallel running,
So as to easily realize the parallel running of more SVG devices.
The power of the present embodiment compensation as needed for PCC point in real time determines unified distribution coefficient, and the output of each SVG device becomes
Change can be reflected into electric system points of common connection realtime power, thus according to above-mentioned control method, when SVG device non-controlling
Also without the system that reconfigures, the stability and high reliablity of system when system jam.
In the present embodiment, unified distribution coefficient is specially reactive power per unit value Qref-pu, wherein -1.0≤Qref-pu≤
1.0, and Qref-puThe maximum capacitive reactive power of=1.0 corresponding SVG devices, Qref-puThe maximum sense of=- 1.0 corresponding SVG devices
Property reactive power.By reactive power per unit value Qref-puAs unified distribution coefficient, host SVG and each slave SVG only need
Power is compensated needed for can determining according to respective rated output reactive capability.In the present embodiment, each SVG device in step 3)
The power of required compensation is specially the reactive power per unit value Q as unified distribution coefficientref-puWith the rated output of SVG device
Product between reactive capability.As above system specifically include SVG1, SVG2 and SVG3 totally 3 SVG devices when, wherein SVG1
It is configured to host, SVG2 and SVG3 and is configured to slave, and SVG1 rated capacity is 10MVar, SVG2 rated capacity 8MVar, SVG1
Rated capacity 6MVar, Qref-pu=0.5, then after sending instructions under SVG1, it is 0.5*10=5MVar that SVG1, which exports capacitive reactive power,
SVG2 export capacitive reactive power be 0.5*8=4MVar, SVG3 export capacitive reactive power be 0.5*6=3MVar, amount to output capacitive without
Function 12MVar.
In the present embodiment, algorithm is adjusted in real time according to the control of electric system points of common connection especially by PI in step 2)
The reactive power per unit value Q of compensation power needed for target value and value of feedback calculateref-puAnd as unified distribution coefficient, with right
The control target value of electric system points of common connection carries out PI adjusting, wherein control model of the control target value according to SVG device
It can be voltage, reactive power or power factor, that is, realize the adjusting to the voltage of PCC point, reactive power or power factor.
The present embodiment is adjusted the specific steps of the reactive power per unit value of compensation power needed for algorithm calculates by PI are as follows: will control target
Preset value is as the input of pi regulator, feedback of the control target actual value as pi regulator of electric system points of common connection
Amount input, pi regulator execute the reactive power per unit value Q that required compensation power is obtained after PI is adjustedref-puOutput, wherein controlling
Target is voltage, reactive power or the power factor of PCC point.
As shown in Fig. 2, when the operation of SVG device multi-machine parallel connection is realized in the present embodiment control, specifically by the control of every SVG device
System processed according to the setting of master/slave machine, selects different control operational modes (host operational mode or slave operation mould first
Formula)；When being configured to host, host SVG acquires the voltage and current signals of PCC point by collection of simulant signal plate, calculates
Preset control target value (such as predetermined power factor value) is arranged the control target actual value (such as power factor value) of PCC point
For the input parameter value ref of pi regulator, by the control target actual value being calculated (i.e. the current feedback value of PCC point) conduct
The feedback quantity feedback of pi regulator passes through the reactive power per unit value Q compensated needed for being calculated after pi regulatorref-pu,
Each slave SVG is transferred to by optical fiber ring network；Host SVG is by reactive power per unit value Qref-puBe converted to reactive current reference
Value IrefAfterwards, by current inner loop control link, main circuit exports reactive current ISVGTo power grid, thus according to reactive power mark
Value Qref-puControl host SVG output reactive power；When being configured to slave, slave SVG, which only needs to communicate by optical fiber ring network, to be obtained
The reactive power per unit value Q for taking host SVG to issueref-pu, the corresponding reactive current I of control outputSVGTo export required idle function
Rate.
The present embodiment is adjusted by PI and determines reactive power per unit value Qref-pu, each SVG device is according to the reactive power mark
Value Qref-puDetermine the respectively corresponding required power compensated, under this idle allocation model, PI adjusting can quickly adjust defeated
Output, i.e. reactive power per unit value Qref-pu, carry out the idle power output of every SVG device in adjustment system, PCC point adjusted with this
Reactive power is to control target is approached, since the idle output variation of any one SVG device can all be reacted to the anti-of PI adjusting
In feedback amount feedback, thus when above-mentioned control method of the present embodiment is executed without the distribution of work, does not need to build between slave SVG device
Vertical connection, does not need mutually to obtain respective state yet, and the idle method of salary distribution is simple, and can quickly, effectively carry out power compensation.
Certainly in other embodiments, algorithm can also be adjusted using other calculate reactive power per unit value Qref-puTo approach PCC point
Control target.
SVG device switch step when further including failure in the present embodiment, after step 3), specific steps are as follows: real-time monitoring system
The malfunction of each SVG device in system, when breaking down there are SVG device, judge whether be SVG device control system
It breaks down, if so, disconnecting the connection of failure SVG device, and two SVG devices connecting with failure SVG device is carried out
Connection from optical fiber ring network to remove failure SVG device；Otherwise current operating conditions are kept.By each in real-time monitoring system
The malfunction of platform SVG device guarantees system to cut off failure SVG device in time when SVG device control system breaks down
Normal operation, and due to the connection type based on optical fiber ring network, the fast and easy that SVG device may be implemented puts into operation.
In the present embodiment, when failure in SVG device switch step, if it is determined that the control system to SVG device occur therefore
When barrier, judge whether failure SVG device is configured to host, if it is, by failure SVG device after being removed in optical fiber ring network,
It reconfigures one and can collect electric system points of common connection (PCC) voltage, the SVG device of current signal is host, it
Remaining SVG device is slave.Each SVG device is communicated by optical fiber ring network, then, can be quick in host SVG device failure
Switching other SVG devices is host, guarantees that system operates normally.
Specifically, when the present embodiment system executes above-mentioned control method, when breaking down according to the difference of host and slave processors mode
It can be divided into:
It breaks down if it is slave SVG:
1. failure has occurred if it is the part in slave SVG in addition to control system causes to shut down, at this time slave SVG
Control system can work normally, and optical fiber ring network communication is normal, thus the slave SVG to break down will not influence whole system
Operation；When using the above-mentioned control method adjusted based on PI, although system can reduce one without work output (i.e. event suddenly at this time
Hinder the idle output of slave SVG), but host SVG can quickly detect this variation by the feedback quantity of PCC point, be adjusted by PI
Device can adjust rapidly, and controlling other SVG devices, to increase output idle idle come the output for adjusting whole system with this, still can be with
Achieve the purpose that control target, realizes quick soft handover；
2. if it is slave SVG control system have occurred failure cause optic fibre of looped network can not normal communication, then stop transport institute
There is SVG device, failure SVG device is removed from optical fiber ring network network, the communication of recovery optical fiber ring network can start all again
SVG device operation, it is thus possible to realize quickly re-running for system after a failure.Removing SVG device will be with failure SVG device
Connection two SVG devices be connected, if such as slave SVG3 failure has occurred, only need to will originally be connected to SVG3 optical fiber reception
The optical fiber of end RX is connected to the optical fiber receiving end RX of SVG4.
It breaks down if it is host SVG:
SVG device is caused to be shut down 1. failure has occurred if it is part of the host SVG in addition to control system, at this time host
The control system of SVG can work normally, and optical fiber ring network communication is normal, and the host SVG to break down will not influence package unit
Operation, although host SVG device shutdown at this time no longer exports idle, controlling automatic tracking and compensating program in program still can be with
Operation；When using the above-mentioned control method adjusted based on PI, this variation can be quickly detected by the feedback quantity of PCC point, passed through
Pi regulator can adjust rapidly output valve Qref-pu, it is idle come the output for adjusting package unit with this, it still can achieve control mesh
Target purpose realizes quick soft handover.
2. if it is host SVG control system have occurred failure cause optical fiber ring network can not normal communication, then stop transport institute
There is SVG device, and failure SVG device is removed from optical fiber ring network network, is reconfigured after restoring optical fiber ring network communication again
Host, quickly putting into operation after can be realized hostdown.
Above-mentioned only presently preferred embodiments of the present invention, is not intended to limit the present invention in any form.Although of the invention
It has been disclosed in a preferred embodiment above, however, it is not intended to limit the invention.Therefore, all without departing from technical solution of the present invention
Content, technical spirit any simple modifications, equivalents, and modifications made to the above embodiment, should all fall according to the present invention
In the range of technical solution of the present invention protection.
Claims (10)
1. a kind of system for realizing the operation of SVG device multi-machine parallel connection, it is characterised in that including more SVG devices, every SVG
Device is respectively used to receive, send the fiber port of optical signal configured with a pair, is by described between each SVG device
Fiber port is sequentially connected in series and two SVG device ring topologies interconnected of head and the tail are to constitute optical fiber ring network, each institute
It states in SVG device, is configured to the SVG device of host and transmits control instruction by the optical fiber ring network to be configured to slave to remaining
SVG device, and the SVG device for being configured to slave are compensated needed for control output by optical fiber ring network upload status information
Reactive power；The optical fiber ring network is specifically connected by the optical fiber sending port of the First SVG device as starting tie point
To the optical fiber receiving port of second SVG device, the optical fiber sending port of second SVG device is connected to third platform SVG device
Optical fiber receiving port, and so on, until the optical fiber sending port of (n-1)th SVG device is connected to n-th SVG device
Optical fiber receiving port, while the light as the optical fiber sending port of last n-th SVG device and First SVG device
Fine receiving port connection, forms the ring structure of closure.
2. the system according to claim 1 for realizing the operation of SVG device multi-machine parallel connection, it is characterised in that: the SVG device
Control system include master board for controlling reactive power output and the data that are connect with the master board respectively
Collection plate, analog acquisition plate, SVG current transformer are measured, the fiber port is arranged in the master board, is configured to host
Analog acquisition plate is respectively connected to the voltage signal and current signal of electric system points of common connection in the SVG device.
3. the system according to claim 1 or 2 for realizing the operation of SVG device multi-machine parallel connection, it is characterised in that: at least two
The SVG device with for acquiring the voltage transformer pt of electric system points of common connection voltage signal and for acquiring power train
The Current Transmit connection of system points of common connection current signal.
4. utilizing the control method of system described in any one of claims 1 to 33, which is characterized in that step includes:
1) it configures any one and can collect the voltage of electric system points of common connection, the SVG device of current signal is
Host, remaining SVG device are slave；
2) SVG device of host is configured in the step 1) in real time according to the control target value meter of electric system points of common connection
Power is compensated needed for calculating, and determines that is used for the unified distribution coefficient without the distribution of work by required compensation power, and refer to as control
It enables and each SVG device for being configured to slave is transmitted to by the optical fiber ring network；
3) function that each SVG device compensates needed for being calculated respectively according to the unified distribution coefficient and rated output reactive capability
Rate, each SVG device execute power compensation according to the power control being respectively calculated.
5. control method according to claim 4, it is characterised in that: the unified distribution coefficient is reactive power per unit value
Qref-pu, wherein -1.0≤Qref-pu≤ 1.0, and Qref-puThe maximum capacitive reactive power of=1.0 corresponding SVG devices, Qref-pu=-
The maximum inductive reactive power of 1.0 corresponding SVG devices.
6. control method according to claim 5, it is characterised in that: compensation needed for each SVG device in the step 3)
Power be specially as distribute unitedly coefficient the reactive power per unit value Qref-puIt is idle with the rated output of SVG device
Product between capacity.
7. control method according to claim 5 or 6, which is characterized in that adjust and calculate especially by PI in the step 2)
The reactive power of compensation power needed for method is calculated according to the control target value and value of feedback of electric system points of common connection in real time
Per unit value Qref-puAnd as the unified distribution coefficient, it is adjusted with the control target value to electric system points of common connection.
8. control method according to claim 7, it is characterised in that: described adjusted needed for algorithm calculates by PI compensates power
Reactive power per unit value Qref-puSpecific steps are as follows: input of the preset value as pi regulator, the power train of target will be controlled
The actual value of the control target of system points of common connection is inputted as the feedback quantity of pi regulator, and the pi regulator executes PI and adjusts
The reactive power per unit value Q of compensation power needed for obtaining afterwardsref-puOutput.
9. the control method according to any one of claim 4~8, which is characterized in that further include after the step 3)
SVG device switch step when failure, specific steps are as follows: the malfunction of each SVG device in real-time monitoring system works as presence
When SVG device breaks down, judge whether it is that the control system of SVG device breaks down, if so, disconnecting failure SVG device
Connection, and by two SVG devices being connect with the failure SVG device be attached with by failure SVG device from fiber optic loop
It is removed in net；Otherwise current operating conditions are kept.
10. control method according to claim 9, it is characterised in that: when the failure in SVG device switch step, such as
When the control system that fruit determines SVG device breaks down, judge whether failure SVG device is configured to host, if it is, will
Failure SVG device after being removed in optical fiber ring network, reconfigure the voltage that can collect electric system points of common connection,
The SVG device of current signal is host, remaining SVG device is slave.
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| CN109149911B (en) * | 2017-06-28 | 2020-03-27 | 北京金风科创风电设备有限公司 | Power module, parallel device thereof, converter and control method |
| CN107565581B (en) * | 2017-09-08 | 2019-12-10 | 许继电气股份有限公司 | reactive compensation device parallel operation system and reactive compensation control method |
| CN107508324B (en) * | 2017-10-12 | 2020-06-16 | 珠海汇众能源科技有限公司 | Converter parallel control method and system |
| CN108494584B (en) * | 2018-02-26 | 2021-03-16 | 武汉武新电气科技股份有限公司 | Communication control method and system of multi-module parallel active inverter |
| CN110445141B (en) * | 2019-08-20 | 2021-01-29 | 上海艾临科智能科技有限公司 | Electric energy management control method and control device |
| CN111181169B (en) * | 2020-01-13 | 2023-10-20 | 深圳市禾望电气股份有限公司 | Control method and device for SVG parallel operation system and storage medium |
| CN111555295B (en) * | 2020-04-28 | 2021-09-28 | 国网河北省电力有限公司电力科学研究院 | Online coordination control method for multiple reactive power compensation devices in regional power grid |
| CN112838619B (en) * | 2020-12-30 | 2023-03-28 | 山东大学 | Energy storage converter parallel operation system and method based on high-speed serial optical fiber |
| CN113271148A (en) * | 2021-06-11 | 2021-08-17 | 青岛海越机电科技有限公司 | Optical fiber synchronous operation method |
| CN113741250B (en) * | 2021-08-16 | 2024-03-26 | 辽宁荣信电力电子技术有限公司 | Redundancy control system and method for SVG |
| CN113885307A (en) * | 2021-10-12 | 2022-01-04 | 广东安朴电力技术有限公司 | SVG parallel machine redundancy control method, SVG control method and SVG control system |
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