CN108923438A - A kind of more power quality controlling device coordinated control systems - Google Patents
A kind of more power quality controlling device coordinated control systems Download PDFInfo
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- CN108923438A CN108923438A CN201810742189.XA CN201810742189A CN108923438A CN 108923438 A CN108923438 A CN 108923438A CN 201810742189 A CN201810742189 A CN 201810742189A CN 108923438 A CN108923438 A CN 108923438A
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- 230000008878 coupling Effects 0.000 claims abstract description 7
- 238000010168 coupling process Methods 0.000 claims abstract description 7
- 238000005859 coupling reaction Methods 0.000 claims abstract description 7
- 238000004891 communication Methods 0.000 claims description 12
- 238000004146 energy storage Methods 0.000 claims description 11
- 238000009826 distribution Methods 0.000 claims description 5
- 238000012216 screening Methods 0.000 claims description 3
- 230000001276 controlling effect Effects 0.000 description 101
- 238000000034 method Methods 0.000 description 7
- 230000005611 electricity Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000011217 control strategy Methods 0.000 description 3
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- 239000003990 capacitor Substances 0.000 description 1
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Classifications
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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
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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
- H02J3/01—Arrangements for reducing harmonics or ripples
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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
- H02J3/26—Arrangements for eliminating or reducing asymmetry in polyphase networks
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- H02J3/382—
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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
- Y02E40/30—Reactive power compensation
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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
- Y02E40/40—Arrangements for reducing harmonics
-
- 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
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
Abstract
A kind of more power quality controlling device coordinated control systems, are made of multiple power quality controlling devices (1), are mounted on the front end of important sensitive load or point of common coupling feeder line in power grid；Each power quality controlling device (1) contains tandem type governance unit (11), parallel connection type governance unit (12) and central controller (13)；Tandem type governance unit (11) is connect with parallel connection type governance unit (12) by general DC busbar, and central controller (13) is connect with tandem type governance unit (11) and parallel connection type governance unit (12).It are furnished with administrative center (2) when multiple power quality controlling device (1) combined operatings use.The administrative center (2) communicates with the central controller (13), administrative center (2) judges grid power quality problem, the multiple power quality controlling devices of coordinated operation (1) by acquisition network voltage, load voltage and load current information.
Description
Technical field
The present invention relates to a kind of power quality adjustment equipments.
Background technique
As a kind of clean secondary energy sources, electric power has very important effect in national economy and daily life,
However, modern industrial production gradually tends to intellectually and automatically, and distribution net work structure is also increasingly multiple with the progress of social science and technology
Miscellaneous, type, the quantity of sensitive load also gradually increase, and it is impossible to meet the need of certain important loads for common power supply quality
It asks, thus power supply quality also proposed than more strict requirements in the past.It is supplied this requires power supply department takes measures to improve
Electricity quality, to guarantee that important load obtains good power supply.At the same time, due to various power quality controlling device demands
Market potential it is very big, compensation effect is obvious in practical applications, and the cost performance of various power electronic devices constantly mention
It is high, it is contemplated that power quality controlling technology has boundless development prospect.
As shown in Figure 1, traditional Research on Unified Power Quality Conditioner (Unified Power Quality Conditioner,
UPQC) as a kind of power quality controlling technology with advanced typicalness, the tandem type based on voltage compensating principle is administered
Technology and parallel connection type Treatment process based on current compensation principle combine, and constitute a comprehensive power quality controlling dress
It is standby, both the asymmetric harmonic wave of network voltage can also be compensated, can both be subtracted with the asymmetry and harmonic wave that compensating non-linear loads
Few nonlinear-load pollutes power grid bring electric energy, or important sensitive load provides the power supply of high quality, can
To solve most power quality problem, there are very open market prospects.
But there is also some limitations by traditional UPQC, while as the type of sensitive load, quantity increase rapidly, matching
Electric network composition is also increasingly sophisticated, and more strict requirements are proposed in terms of the Treatment process of power quality.From controlling device power
From the aspect of, the capacity of sensitive load is increasing at present, and voltage class is also higher and higher, traditional UPQC rating of set by
The switching frequency of power electronic devices and the limitation of through-current capability, power quality controlling effect is not in powerful application
It is good；From the aspect of controlling device reliability, flexibility, UPQC device topological structure traditional at present is fixed, and series connection is administered single
Member is dull with governance unit function in parallel, and power quality administers difficulty simultaneously, and sensitive load is high-quality if controlling device failure
The power supply of amount is failed.
Therefore, the series and parallel coordination control strategy for studying a kind of novel more power quality controlling devices be realize high pressure,
One of large capacity, high reliability and effective means of flexibility, while can also preferably solve device switching frequency and capacity
Between contradiction.
Document " more parallel connection type APF hybrid compensation coordinated controls " (Yang Zhenyu, Zhao Jianfeng, Tang Guoqing electric system and its
It automates journal .2006,18 (6):To multiple parallel connection type power quality controlling equipment in 32-37.) --- Active Power Filter-APF
The coordinated control in parallel of device is studied, and the controlling party that the combined operating of more Active Power Filter-APFs uses is proposed
Method, and the stability control for passing through control when realizing combined operating.There is no to multiple power quality controllings in parallel for this document
The multiplexing functions of equipment are studied, while also without the content of the series-parallel combined operating of serially connected electrical energy quality abatement equipment.
Chinese patent 201310242709.8 proposes the multi-machine communication system and method for a kind of SVG/APF parallel running,
The patent mainly for more SVG/APF equipment by being communicated between lan device, thus realize each equipment in parallel it
Between coordination output.Not to the power quality equipment proposition topology schemes of series and parallel pattern in this patent, and due to
Its limitation designed can not propose the coordinated control mode of centralized control or decentralised control to the operation of more abatement equipments,
Also can not more abatement equipments be provided with the control program of different function command distribution simultaneously.
Summary of the invention
The purpose of the present invention is overcome above-mentioned existing power quality regulation technology in multiple types large capacity sensitive load application
The use of occasion limits, based on the series and parallel topological structure optimization and coordination control strategy of multiple power quality controlling devices
The problems such as research, proposes that power quality controlling can be improved in a kind of more power quality controlling device coordinated control systems, the present invention
The capacity configuration and compensation index of system, while also improving the reliability and flexibility of power quality controlling system.
Power quality controlling device coordinated control system of the present invention is made of multiple power quality controlling devices, each described
Power quality controlling device contain tandem type governance unit, parallel connection type governance unit and central controller.Wherein tandem type is controlled
Reason unit is connect with parallel connection type governance unit by general DC busbar, and central controller is respectively with tandem type governance unit and simultaneously
The connection of connection type governance unit.It is furnished with administrative center when multiple power quality controlling device combined operatings use.Administrative center and electricity
The central controller communication of energy quality controlling device.The administrative center passes through acquisition network voltage, load voltage and load
Current information judges grid power quality problem, the multiple power quality controlling devices of coordinated operation.
The power quality controlling device is mounted on the front end of important sensitive load or point of common coupling feeder line in power grid,
Higher quality of voltage is provided for sensitive load or entire feeder line, while reducing sensitive load to the electric pollution problem of power grid.
The power quality controlling device can be single-phase, three-phase three-wire system, three-phase and four-line or three-phase independence unsteady flow knot
Structure.
The power quality controlling device is total to by the tandem type governance unit and the parallel connection type governance unit
Bus is constituted.The power quality controlling device includes configuring direct current side energy-storage units and does not configure DC side energy-storage units two
Kind structure type.DC side energy-storage units and the tandem type governance unit and the parallel connection type governance unit common bus.
The power quality controlling equipment of DC side energy-storage units is not configured when administering power quality problem, and required energy passes through power grid
Side or load-side rectification obtain；The power quality controlling equipment of configuring direct current side energy-storage units when administering power quality problem,
Required energy can carry out energy storage acquisition by configuring big capacity electrolyte capacitor, power battery or supercapacitor.
The connection type of the power quality controlling device and power grid include direct screening net, by isolating transformer connection or
Two kinds of mixed forms of person.
Tandem type governance unit and parallel connection type governance unit in the power quality controlling device can be by single unsteady flows
Modular structure or the changeable flow module of cascade, or both mixing are constituted.Single unsteady flow module is usually by two bridge arms to four bridge legs
Set of power switches at；Cascade multiple-variable flow modular structure is usually made of multiple single unsteady flow block coupled in series.
The power quality controlling device has processing voltage swells, voltage dip, reactive compensation, harmonic pollution, electricity
Pressure deviates, the function of the power quality problems such as voltage fluctuation and Voltage unbalance.
The capacity configuration of the tandem type governance unit and the parallel connection type governance unit can be it is identical, can also
To be that capacity configuration is different.
After tandem type governance unit and parallel connection type governance unit in the power quality controlling device can be first string
And form, it is also possible to first and rear string form.
The central controller contains communication unit, the communication unit realize different power quality controlling devices it
Between coordinating communication.
The administrative center can be independent computer or microprocessor system, is also possible to multiple power qualities and controls
Manage wherein one or more central controllers of device.
It is connected when multiple power quality controlling device combined operatings use with different series and parallel topological structures.
In multiple power quality controlling devices, the grid-connected tie point of parallel connection type governance unit and tandem type governance unit with end to end,
The mode synthetic operation being sequentially connected in series.The compensation of power quality controlling system balance voltage dip can be improved in such topological structure
Depth improves the performance indicator of power quality controlling system.
Multiple power quality controlling device combined operatings are in use, connected with different series and parallel topological structures
Connect, the grid-connected tie points of multiple parallel connection type governance units and multiple tandem type governance units can respectively with
Mode synthetic operation in parallel.The compensation capacity of power quality controlling system can be improved in such topological structure, so that this system
Its performance indicator is still kept in the power quality controlling of large capacity sensitive load.
Multiple power quality controlling device combined operatings are in use, connected with different series and parallel topological structures
It connects, the grid-connected tie point parallel connection of multiple parallel connection type governance units accesses power grid, and multiple tandem types are administered single
The grid-connected tie point of member is sequentially connected in series the mode synthetic operation of access power grid.The series connection of such topological structure tandem type governance unit
The compensation depth of power quality controlling system balance voltage dip can be improved in access, improves the performance of power quality controlling system
Index, while parallel connection type governance unit can effectively improve power quality controlling system pair in the used in parallel of point of common coupling
Electric current is idle, the Governance Ability of harmonic wave, and avoids the impedance influences between multiple power quality controlling devices, improves parallel connection
The compensation capacity and performance of type governance unit.
Series-parallel use of multiple power quality controlling devices is capable of providing different power quality compensation schemes,
Entire power quality controlling system flexibility is improved, meanwhile, when the failure of some power quality controlling device, other electric energy matter
Amount controlling device still can work normally, and improve the reliability of system.
Multiple power quality controlling devices are in combined operating in use, the Collaborative Control plan of the administrative center
It can also can also slightly be used using the control mode that score is matched by measure using the control mode for dividing equally compensating instruction
The control mode of clipping distribution by measure, can also be using the control mode distributed by different compensation functions.
Multiple power quality controlling devices can take centralized control or decentralized control, and when centralized control manages
Reason center executes multiple power quality controlling devices according to network system power quality event type and is acted, decentralised control
When, each power quality controlling device oneself judges according to power quality event type and executes self-compensation situation movement, and passes through
Slow communication, which is used, realizes the coordinated operations of multiple electric energy quality compensating devices with the compensation multi-variant control method that is mutually related.
A kind of more power quality controlling device coordinated control systems of the present invention have multiple excellent in terms of power quality controlling
Point：
1, multiple power quality controlling devices are combined by the present invention by series-parallel mode, can fast implement electricity
Large capacity in energy quality controlling problem, the demand of high voltage；
2, scheme provided by the present invention is suitable for the load field of different characteristics by different series-parallel combinations
It closes, improves the applicability of system；
3, a variety of electric energy may be implemented in the Collaborative Control of multiple power quality controlling devices in scheme provided by the present invention
The multiplexing functions of quality controlling device increase the flexibility of system；
4, more equipments may be implemented in the Collaborative Control of multiple power quality controlling devices in scheme provided by the present invention
Redundancy backup, improve the reliability of system.
Detailed description of the invention
Fig. 1 is the common topology diagram of traditional Research on Unified Power Quality Conditioner；
Fig. 2 is the more power quality controlling device coordinated control system schematic diagrames of the present invention；
Fig. 3 is the first series and parallel topology diagram of the invention；
Fig. 4 is second of series and parallel topology diagram of the invention；
Fig. 5 is the third series and parallel topology diagram of the invention；
Fig. 6 is coordinated control system centralized control structure figure of the present invention；
Fig. 7 is coordinated control system decentralized control structure figure of the present invention.
Specific embodiment
With reference to the accompanying drawing and specific embodiment the invention will be further described.
As shown in Fig. 2, the power quality controlling device coordinated control system of the present invention is by multiple power quality controllings
Device 1 is constituted.The power quality controlling device 1 contains tandem type governance unit 11, parallel connection type governance unit 12 and center
Controller 13.Wherein tandem type governance unit 11 is connect with parallel connection type governance unit 12 by general DC busbar, center control
Device 13 is connect with tandem type governance unit 11 and parallel connection type governance unit 12.Multiple power quality controlling device combined operatings use
When, it is furnished with administrative center 2, the administrative center 2 communicates with the central controller 13, and the administrative center 2 passes through
Acquisition network voltage, load voltage and load current information judge grid power quality problem, the multiple power qualities of coordinated operation
Controlling device 1.
The power quality controlling device 1 can be single-phase, three-phase three-wire system, three-phase and four-line or three-phase independence unsteady flow knot
Structure.
The power quality controlling device 1 is by the tandem type governance unit 11 and the parallel connection type governance unit
12 common bus are constituted.The power quality controlling device 1 is including configuring direct current side energy-storage units and does not configure DC side energy storage
Two kinds of structure types of unit, the DC side energy-storage units are connected on general DC busbar.
The power quality controlling device 1 and the connection type of power grid include direct screening net, are connect by isolating transformer
Or two kinds of mixed forms.
Tandem type governance unit 11 and parallel connection type governance unit 12 in the power quality controlling device 1 can be list
A unsteady flow modular structure, or cascade multiple-variable flow modular structure, or both mixed form.
The power quality controlling device 1 has processing voltage swells, voltage dip, reactive compensation, harmonic wave control, electricity
Pressure deviates, the functions such as voltage fluctuation and imbalance compensation.
The capacity configuration of the tandem type governance unit 11 and the parallel connection type governance unit 12 can be identical, can also
With difference.
The grid-connected tie point of the tandem type governance unit 11 and parallel connection type governance unit 12 can be controlled first for tandem type
Manage be after unit 11 parallel connection type governance unit 12 form, be also possible to first be after parallel connection type governance unit 12 to be tandem type improvement
The form of unit 11.
The central controller 13 contains communication unit, and the communication unit is connected with the administrative center 2,
Realize the coordinating communication between different power quality controlling devices.
The administrative center 2 can be independent computer or microprocessor system, be also possible to multiple power qualities
Wherein one or more central controllers 13 in controlling device 1.When administrative center 2 is independent computer or microprocessor
When, independent computer or microprocessor judge power grid quality by acquisition network voltage, load voltage and load current information
Problem, the multiple power quality controlling devices 1 of coordinated operation.When administrative center 2 is wherein one or more central controllers 13,
By acquisition network voltage, load voltage and load current information, grid power quality problem, the multiple electric energy of coordinated operation are judged
Quality controlling device 1.
As shown in figure 3, first power quality controlling device 10 and the second power quality controlling equipment 20 be not with
When same series and parallel topological structure is run, the first tandem type governance unit 101, first tandem type are administered single
First 102, second tandem type governance unit 201, the second parallel connection type governance unit 202 grid-connected tie point with end to end, successively
The compensation depth of power quality controlling system balance voltage dip can be improved in series connection, such topological structure, improves power quality
The performance indicator of governing system.
As shown in figure 4, first power quality controlling device 10 and the second power quality controlling equipment 20 are with difference
The operation of series and parallel topological structure when, the first parallel connection type governance unit 102 and the second parallel connection type governance unit 202
Grid-connected tie point is in parallel；And the grid-connected connection of the first tandem type governance unit 101 and the second tandem type governance unit 201
Combined operating uses point in parallel, and such topological structure can be improved the compensation capacity of power quality controlling system, make
Subsystem is obtained in the power quality controlling of large capacity sensitive load, can still keep its performance indicator.
As shown in figure 5, first power quality controlling device 10 and the second power quality controlling equipment 20 are with difference
The operation of series and parallel topological structure when, the first parallel connection type governance unit 102 and the second parallel connection type governance unit 202
Grid-connected tie point parallel connection accesses power grid point of common coupling, and the first tandem type governance unit 101 and the second tandem type are administered
The grid-connected tie point series connection access power grid of unit 201, combined operating uses by this method, and such topological structure tandem type is administered single
The compensation depth of power quality controlling system balance voltage dip can be improved in the series connection access of member, improves power quality controlling system
The performance indicator of system, while parallel connection type governance unit is controlled in the power quality used in parallel that can effectively improve of point of common coupling
Reason system is idle to electric current, harmonic wave Governance Ability, and avoids the impedance influences between multiple power quality controlling devices, mentions
The high compensation capacity and performance of parallel connection type governance unit.
As shown in fig. 6, first power quality controlling device 10 and the second power quality controlling equipment 20 is being combined
Operation is in use, the administrative center 30 uses central controlled systematic collaboration control strategy.When centralized control, administrative center
30 acquisition network voltages, load voltage and load current information judge grid power quality problem, according to network system electric energy matter
Measure fault type control the first power quality controlling device 10 and the second power quality controlling equipment 20 carry out power quality compensation,
The movement such as reactive power support or harmonic wave control.
As shown in fig. 7, first power quality controlling device 10 and the second power quality controlling equipment 20 is taken point
Dissipate control mode.When decentralised control, the first power quality controlling device 10 and the second power quality controlling equipment 20 acquire power grid
Voltage, load voltage and load current information, judge grid power quality problem, according to power quality event type, the first electricity
Can quality controlling device 10 and the second power quality controlling equipment 20 judge simultaneously to execute the movement of itself power quality compensation, not with pipe
Reason center 30 communicates, independent operating.
First power quality controlling device 10 and 20 combined operating of the second power quality controlling equipment is in use, can
Can also can also be held using pressing using the control mode that score is matched by measure using the control mode for dividing equally compensating instruction
The control mode of clipping distribution is measured, it can also be using the control mode distributed by different compensation functions.
Claims (9)
1. a kind of more power quality controlling device coordinated control systems, it is characterised in that：The power quality controlling device association
It adjusts control system to be made of multiple power quality controlling devices (1), is mounted on important sensitive load or point of common coupling in power grid
The front end of feeder line；Each power quality controlling device (1) contains tandem type governance unit (11), parallel connection type governance unit
(12) and central controller (13)；Tandem type governance unit (11) and parallel connection type governance unit (12) are connected by general DC busbar
It connects, central controller (13) is connect with tandem type governance unit (11) and parallel connection type governance unit (12)；Multiple power qualities are controlled
It manages when device (1) combined operating uses and is furnished with administrative center (2)；The administrative center (2) and the central controller
(13) it communicates, administrative center (2) judges that grid power quality is asked by acquisition network voltage, load voltage and load current information
Topic, the multiple power quality controlling devices of coordinated operation (1).
2. more power quality controlling device coordinated control systems according to claim 1, it is characterised in that：The electric energy
Quality controlling device is single-phase or three-phase structure, by the tandem type governance unit (11) and the parallel connection type governance unit
(12) common bus is constituted；The power quality controlling device includes configuring direct current side energy-storage units and does not configure DC side energy storage
Two kinds of structure types of unit；The power quality controlling device includes direct screening net, by the way that change is isolated with the connection type of power grid
Depressor connection or two kinds of mixed forms；The power quality controlling device include single unsteady flow modular structure, cascade it is changeable
Flow module structure or both mixed form；Single unsteady flow module by two bridge arms to four bridge legs set of power switches at；Grade
Connection multiple-variable flow modular structure is made of multiple single unsteady flow block coupled in series.
3. more power quality controlling device coordinated control systems according to claim 1, it is characterised in that：The center
Controller (13) contains communication unit, and the communication unit realizes the coordinating communication between different power quality controlling devices.
4. more power quality controlling device coordinated control systems according to claim 1, it is characterised in that：The management
Center is independent the central controller of computer or microprocessor system or power quality controlling device.
5. more power quality controlling device coordinated control systems according to claim 1, it is characterised in that：Described in multiple
When power quality controlling device is with the operation of series and parallel topological structure, the first tandem type governance unit (101), the first tandem type are controlled
Manage the grid-connected tie point head and the tail phase of unit (102), the second tandem type governance unit (201), the second parallel connection type governance unit (202)
It connects, is sequentially connected in series.
6. more power quality controlling device coordinated control systems according to claim 1, it is characterised in that：Described in multiple
When power quality controlling device is with the operation of series and parallel topological structure, the first parallel connection type governance unit (102) is controlled with the second parallel connection type
The grid-connected tie point for managing unit (202) is in parallel, and the first tandem type governance unit (101) and the second tandem type governance unit
(201) grid-connected tie point is in parallel.
7. more power quality controlling device coordinated control systems according to claim 1, it is characterised in that：Described in multiple
When power quality controlling device is with the operation of series and parallel topological structure, the grid-connected tie point of multiple parallel connection type governance units
Parallel connection access power grid point of common coupling, the grid-connected tie point of multiple tandem type governance units is with the side for accessing power grid of connecting
Formula synthetic operation.
8. more power quality controlling device coordinated control systems according to claim 1, it is characterised in that：Described in multiple
When power quality controlling device takes centralized control, administrative center (2) is according to network system power quality event type control
Make the compensating movement of multiple power quality controlling devices；Multiple power quality controlling devices take decentralized control
When, each power quality controlling device judges according to power quality event type and executes self-compensation situation movement.
9. more power quality controlling device coordinated control systems according to claim 1, it is characterised in that：Described in multiple
When power quality controlling device combined operating, using the control mode of respectively compensating instruction, or the controlling party that score is matched by measure
Formula, or the control mode of clipping distribution by measure, or using the control mode distributed by different compensation functions.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110794231A (en) * | 2019-10-25 | 2020-02-14 | 上海电气集团股份有限公司 | High-low voltage ride through test device for wind power pitch system |
| CN111525584A (en) * | 2020-07-06 | 2020-08-11 | 深圳华工能源技术有限公司 | Intelligent power distribution and utilization system power saving method based on omnibearing power quality optimization treatment |
| CN116365536A (en) * | 2023-06-01 | 2023-06-30 | 国网安徽省电力有限公司合肥供电公司 | Low-voltage reactive power accuracy compensation method based on power distribution |
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| CN203589727U (en) * | 2013-12-05 | 2014-05-07 | 国家电网公司 | Large capacity unified power quality controller |
| EP3197038A1 (en) * | 2016-01-25 | 2017-07-26 | North China Electric Power University | Modular multilevel converter (mmc) topologies with voltage self-balancing capability |
| CN105703362A (en) * | 2016-03-18 | 2016-06-22 | 广东工业大学 | Scattered type power quality regulation system |
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