CN110061501A - A kind of power distribution network intelligence cyclization switch - Google Patents
A kind of power distribution network intelligence cyclization switch Download PDFInfo
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- CN110061501A CN110061501A CN201910502278.1A CN201910502278A CN110061501A CN 110061501 A CN110061501 A CN 110061501A CN 201910502278 A CN201910502278 A CN 201910502278A CN 110061501 A CN110061501 A CN 110061501A
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- series
- connection power
- inverter
- power supply
- parallel
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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
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/04—Circuit arrangements for ac mains or ac distribution networks for connecting networks of the same frequency but supplied from different sources
- H02J3/06—Controlling transfer of power between connected networks; Controlling sharing of load between connected networks
Abstract
The present invention relates to a kind of power distribution network intelligence cyclization switches, it switched including the cyclization for distribution looped network to be opened or closed, switch the intelligent regulator being opened or closed for controlling cyclization, the intelligent regulator includes connecting respectively with communication module, power supply adjustment module, cyclization switch with the communication module of the ring network cabinet communication connection of each node of distribution looped network, the power supply adjustment module for adjusting cyclization switch ends voltage difference, controller, the controller.The beneficial effects of the present invention are: the intelligent regulator that the power distribution network intelligence cyclization of this patent switchs is made of two AC power sources of series-connection power supplies and parallel connection power supply, series-connection power supplies are directly serially connected in distribution network line, by the amplitude and phase that adjust output voltage, directly it is superimposed upon on line power, the amplitude of the voltage difference at cyclization point both ends and phase is set to reach the design requirement of Electromagnetic coupling, cyclization closes the switch, and realizes the operation with closed ring of route.
Description
Technical field
The present invention relates to distribution network technology fields more particularly to a kind of power distribution network intelligence cyclization to switch.
Background technique
In recent years, with the development of economy and society, requirement of the people to power supply reliability is higher and higher.The direct face of power distribution network
To user, the influence to power supply reliability is very important.China's power distribution network passes through long-term development, generally forms that " closed loop is set
Meter, open loop operation " powering mode, and on this basis implement power distribution automation, equipment management, load transfer, outage management,
The measures such as transformer load management guarantee reliable power supply.Although these measures benefit the promotion of distribution network reliability good
It is more, but in line maintenance or failure, the powering mode of open loop operation is still unavoidable from grid switching operation and causes to have a power failure in short-term, nothing
Method meets the responsible consumers such as high-tech industry, financial center to the strict requirement of power supply.In addition it is with solar energy and wind energy
The distributed generation resource of representative accesses power distribution network more and more, brings many influences and impact to the operation of existing system, control.
The mode of radial pattern and open loop operation is difficult to adapt to new operation and control and requires, and is unable to give full play the property of distributed generation resource
Energy.Open loop operation mode limits the promotion of power supply reliability to a certain extent, and in order to reduce power off time, promoting power supply can
By rate, many experts and scholars study closed loop network feasibility problems.The research master of closed loop network problem at present
To include two broad aspect contents: closed loop network turns power supply and closed loop network operation problem.
Under the mode of " closed loop design, open loop operation ", the numerous loads being distributed on distribution line are supplied by single power supply
Electricity, different routes are connected using normally opened interconnection switch, form open loop mode of operation.In line maintenance and the when of falling load, if first
Turning electricity after power failure can be such that power supply reliability reduces, and take the Loop Closing Operation not having a power failure to reduce power off time, it has also become power supply enterprise
Conventional means.
However, if cyclization point two sides can generate circulation, cyclization moment there are pressure difference or two sides short-circuit impedance difference after cyclization
It there is also biggish dash current, protection act may be caused, influence the safe and stable operation of power grid.If operations staff
Only according to operating experience judgement can cyclization, lack test or simulating, verifying, it is possible to because Alloy White Iron it is excessive caused by protect
Malfunction, so as to cause larger range of power failure.
Summary of the invention
It is an object of the invention to overcome problem above of the existing technology, a kind of power distribution network intelligence cyclization is provided and is opened
It closes.
To realize above-mentioned technical purpose and the technique effect, the invention is realized by the following technical scheme:
A kind of power distribution network intelligence cyclization switch, switchs, including the cyclization for distribution looped network to be opened or closed for controlling
Cyclization switchs the intelligent regulator being opened or closed, and the intelligent regulator includes communicating with the ring network cabinet of each node of distribution looped network
The communication module of connection, the power supply adjustment module for adjusting cyclization switch ends voltage difference, controller, the controller respectively with it is logical
Interrogate module, power supply adjustment module, cyclization switch connection.
Wherein, the power supply adjustment module include with the concatenated series-connection power supplies of distribution looped network, it is in parallel with distribution looped network and
Join power supply, filter capacitor, the series-connection power supplies, parallel connection power supply are in parallel with filter capacitor.
Wherein, the series-connection power supplies include series transformer, series-connection power supplies inverter one, series-connection power supplies inverter two, string
Join power inverter three, series-connection power supplies inverter four, the parallel connection power supply include shunt transformer, parallel connection power supply inverter one,
Parallel connection power supply inverter two, parallel connection power supply inverter three, parallel connection power supply inverter four, the first winding and distribution of series transformer
Looped network series connection, after the first end of series-connection power supplies inverter one is in parallel with the first end of series-connection power supplies inverter two with series transformer
Secondary winding first end series connection, the first end of series-connection power supplies inverter three is in parallel with the first end of series-connection power supplies inverter four
It connects afterwards with the second end of the secondary winding of series transformer；The first winding of shunt transformer is in parallel with distribution looped network, in parallel
After the first end of power inverter one is in parallel with the first end of parallel connection power supply inverter two with the secondary winding of shunt transformer
First end series connection, after the first end of parallel connection power supply inverter three is in parallel with the first end of parallel connection power supply inverter four with parallel pressure change
The second end of the secondary winding of device is connected；The second end of series-connection power supplies inverter one, the second end of series-connection power supplies inverter three, simultaneously
It is in parallel to join the second end of power inverter one, the second end of parallel connection power supply inverter three, the first end of filter capacitor；Series-connection power supplies
The second end of inverter two, the second end of series-connection power supplies inverter four, the second end of parallel connection power supply inverter two, parallel connection power supply are inverse
Second end, the second end of filter capacitor for becoming device four are in parallel.
Wherein, the communication module is optical fiber communication modules, and the optical fiber communication modules are each using optical fiber and distribution looped network
The voltage signal detected in the ring network cabinet received is passed to controller by the ring network cabinet communication connection of node, communication optical fiber.
Wherein, the controller is PLC controller.
Wherein, the cyclization switch is breaker.
The beneficial effects of the present invention are: the intelligent regulator that switchs of the power distribution network intelligence cyclization of this patent by series-connection power supplies and
Two AC power sources of parallel connection power supply are constituted, and series-connection power supplies are directly serially connected in distribution network line, by the width for adjusting output voltage
Value and phase, are directly superimposed upon on line power, the amplitude of the voltage difference at cyclization point both ends and phase are made to reach Electromagnetic coupling
Design requirement, cyclization close the switch, and realize the operation with closed ring of route, and can be by adjusting series-connection power supplies state modulator cyclization point electricity
The trend of stream and looped network；Parallel connection power supply is adjusted to key control point with series-connection power supplies, operates to load model and electric source modes, realizes
The conveying of overlapped in series and energy.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, this hair
Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the structural schematic diagram of the embodiment of the present invention；
Fig. 2 is controller in the embodiment of the present invention, communication module, ring network cabinet, power supply adjustment module, cyclization switch connection pass
The structural schematic diagram of system；
Fig. 3 is the structural schematic diagram of power supply adjustment module in the embodiment of the present invention.
Specific embodiment
It is below with reference to the accompanying drawings and in conjunction with the embodiments, next that the present invention will be described in detail.
In the description of the present invention, it is to be understood that, term " aperture ", "upper", "lower", " thickness ", "top", " in ",
Indicating positions or the positional relationship such as " length ", "inner", " surrounding ", are merely for convenience of description of the present invention and simplification of the description, without
It is that the component of indication or suggestion meaning or element must have a particular orientation, is constructed and operated in a specific orientation, therefore not
It can be interpreted as limitation of the present invention.
As shown in Figure 1 to Figure 3, a kind of power distribution network intelligence cyclization switch 200, including for distribution looped network to be opened or closed
100 cyclization switch 220, the intelligent regulator being opened or closed for controlling cyclization switch 220, intelligent regulator include and match
The communication module 210 of 101 communication connection of ring network cabinet of each node of electric looped network 100, the electricity for adjusting 220 voltage difference of the two ends of cyclization switch
Source adjustment module 240, controller 230, controller 230 are switched with communication module 210, power supply adjustment module 240, cyclization respectively
220 connections.
Power supply adjustment module 240 include with the concatenated series-connection power supplies of distribution looped network 100, it is in parallel with distribution looped network 100 and
Join power supply, filter capacitor 2430, series-connection power supplies, parallel connection power supply are in parallel with filter capacitor 2430.
Series-connection power supplies include series transformer 2411, series-connection power supplies inverter 1, series-connection power supplies inverter 2 2413,
Series-connection power supplies inverter 3 2414, series-connection power supplies inverter 4 2415, parallel connection power supply include shunt transformer 2421, parallel connection power supply
Inverter 1, parallel connection power supply inverter 2 2423, parallel connection power supply inverter 3 2424, parallel connection power supply inverter 4 2425,
The first winding of series transformer 2411 is connected with distribution looped network 100, the first end of series-connection power supplies inverter 1 with connect
It connects after the first end of power inverter 2 2413 is in parallel with the first end of the secondary winding of series transformer 2411, series-connection power supplies
After the first end of inverter 3 2414 is in parallel with the first end of series-connection power supplies inverter 4 2415 with series transformer 2411 two
The second end of secondary winding is connected；The first winding of shunt transformer 2421 is in parallel with distribution looped network 100, parallel connection power supply inverter one
After 2422 first end is in parallel with the first end of parallel connection power supply inverter 2 2423 with the secondary winding of shunt transformer 2421
First end series connection, after the first end of parallel connection power supply inverter 3 2424 is in parallel with the first end of parallel connection power supply inverter 4 2425 and
The second end of the secondary winding of shunt transformer 2421 is connected；The second end of series-connection power supplies inverter 1, series-connection power supplies are inverse
Become the second end of device 3 2414, the second end of parallel connection power supply inverter 1, the second end of parallel connection power supply inverter 3 2424,
The first end of filter capacitor 2430 is in parallel；The second end of series-connection power supplies inverter 2 2413, series-connection power supplies inverter 4 2415
Second end, the second end of parallel connection power supply inverter 2 2423, the second end of parallel connection power supply inverter 4 2425, filter capacitor 2430
Second end it is in parallel.
Series transformer 2411, shunt transformer 2421 mainly adjust voltage, meet distribution line Electromagnetic coupling parameter；
Series-connection power supplies inverter 1, series-connection power supplies inverter 2 2413, series-connection power supplies inverter 3 2414, series-connection power supplies inverter
4 2415, parallel connection power supply inverter 1, parallel connection power supply inverter 2 2423, parallel connection power supply inverter 3 2424, electricity in parallel
The control of source inventer 4 2425 realization series-connection power supplies, parallel connection power supply.
Shunt transformer 2421 is the voltage value for the voltage of power distribution network being down to inverter permission, when series-connection power supplies are superimposed just
When voltage, parallel connection power supply input power, when series-connection power supplies are superimposed negative voltage, parallel connection power supply feedback power to power grid, electricity in parallel
Source inventer conveys stable DC voltage by power, and series-connection power supplies inverter output voltage passes through series transformer and line electricity
Laminated adds, and the voltage vector difference of cyclization switch ends is made to be less than the permissible value of Loop Closing Operation, and output signal is closed cyclization switch.
Controller 230 calculates according to the following formula judges whether the voltage difference at 220 both ends of cyclization switch meets cyclization condition,
(ū1+Δū)-ū2≤ūPermit.In formula, ū1For the voltage of the first end of cyclization switch 220, ū2For the second end of cyclization switch 220
Voltage, ūPermitThe 220 permitted voltage difference in both ends of cyclization switch when being closed for cyclization switch 220, Δ ū are that series-connection power supplies are superimposed upon conjunction
Voltage in the distribution looped network 100 of the first end of ring switch 220.
Communication module 210 is optical fiber communication modules, and optical fiber communication modules use the ring of optical fiber and each node of distribution looped network 100
The voltage signal detected in the ring network cabinet 101 received is passed to controller by 101 communication connection of net cabinet, communication optical fiber.Control
Device 230 is PLC controller.Cyclization switch 220 is breaker.
The intelligent regulator of the power distribution network intelligence cyclization switch of this patent is by two alternating currents of series-connection power supplies and parallel connection power supply
Source is constituted, and series-connection power supplies are directly serially connected in distribution network line, by adjusting the amplitude and phase of output voltage, is directly superimposed upon
On line power, the amplitude of the voltage difference at cyclization point both ends and phase is made to reach the design requirement of Electromagnetic coupling, cyclization switch closes
It closes, realizes the operation with closed ring of route, and can be by adjusting the trend of series-connection power supplies state modulator cyclization point electric current and looped network；It is in parallel
Power supply is adjusted to key control point with series-connection power supplies, operates to load model and electric source modes, realizes the defeated of overlapped in series and energy
It send.
In the description of this specification, the description of reference term " one embodiment ", " example ", " specific example " etc. means
Particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least one implementation of the invention
In example or example.In the present specification, schematic expression of the above terms may not refer to the same embodiment or example.
Moreover, particular features, structures, materials, or characteristics described can be in any one or more of the embodiments or examples to close
Suitable mode combines.
The basic principles, main features and advantages of the present invention have been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.
Claims (6)
1. a kind of power distribution network intelligence cyclization switch, it is characterised in that: switched including the cyclization for distribution looped network to be opened or closed,
The intelligent regulator being opened or closed is switched for controlling cyclization, the intelligent regulator includes the ring with each node of distribution looped network
The communication module of net cabinet communication connection, the power supply adjustment module for adjusting cyclization switch ends voltage difference, controller, the controller
It is connected respectively with communication module, power supply adjustment module, cyclization switch.
2. power distribution network intelligence cyclization according to claim 1 switch, it is characterised in that: the power supply adjustment module include with
The concatenated series-connection power supplies of distribution looped network, the parallel connection power supply in parallel with distribution looped network, filter capacitor, the series-connection power supplies, electricity in parallel
Source is in parallel with filter capacitor.
3. power distribution network intelligence cyclization switch according to claim 2, it is characterised in that: the series-connection power supplies include that series connection becomes
Depressor, series-connection power supplies inverter one, series-connection power supplies inverter two, series-connection power supplies inverter three, series-connection power supplies inverter four, it is described
Parallel connection power supply includes shunt transformer, parallel connection power supply inverter one, parallel connection power supply inverter two, parallel connection power supply inverter three, simultaneously
Join power inverter four, the first winding of series transformer connects with distribution looped network, the first end of series-connection power supplies inverter one and
It connects after the first end of series-connection power supplies inverter two is in parallel with the first end of the secondary winding of series transformer, series-connection power supplies inversion
After the first end of device three is in parallel with the first end of series-connection power supplies inverter four with the second end string of the secondary winding of series transformer
Connection；The first winding of shunt transformer is in parallel with distribution looped network, the first end and parallel connection power supply inversion of parallel connection power supply inverter one
It connects after the first end of device two is in parallel with the first end of the secondary winding of shunt transformer, the first end of parallel connection power supply inverter three
It connects after in parallel with the first end of parallel connection power supply inverter four with the second end of the secondary winding of shunt transformer；Series-connection power supplies are inverse
Become the second end of device one, the second end of series-connection power supplies inverter three, the second end of parallel connection power supply inverter one, parallel connection power supply inversion
Second end, the first end of filter capacitor of device three are in parallel；The second end of series-connection power supplies inverter two, series-connection power supplies inverter four
Second end, the second end of parallel connection power supply inverter two, the second end of parallel connection power supply inverter four, the second end of filter capacitor are simultaneously
Connection.
4. power distribution network intelligence cyclization switch according to claim 1, it is characterised in that: the communication module is optical-fibre communications
Module, the optical fiber communication modules use the ring network cabinet communication connection of optical fiber and each node of distribution looped network, and communication optical fiber will receive
To ring network cabinet in the voltage signal that detects pass to controller.
5. power distribution network intelligence cyclization switch according to claim 1, it is characterised in that: the controller is PLC controller.
6. power distribution network intelligence cyclization switch according to claim 1, it is characterised in that: the cyclization switch is breaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910502278.1A CN110061501A (en) | 2019-06-11 | 2019-06-11 | A kind of power distribution network intelligence cyclization switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910502278.1A CN110061501A (en) | 2019-06-11 | 2019-06-11 | A kind of power distribution network intelligence cyclization switch |
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| Publication Number | Publication Date |
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| CN110061501A true CN110061501A (en) | 2019-07-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910502278.1A Pending CN110061501A (en) | 2019-06-11 | 2019-06-11 | A kind of power distribution network intelligence cyclization switch |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110957706A (en) * | 2019-11-26 | 2020-04-03 | 国网浙江省电力有限公司电力科学研究院 | Method for judging switching operation of distribution system without power outage |
| CN111952970A (en) * | 2020-08-17 | 2020-11-17 | 云南电网有限责任公司电力科学研究院 | Power distribution network loop closing and power adjusting method and device |
| CN116345694B (en) * | 2023-05-08 | 2024-02-06 | 江西嘉鸣科技电子有限公司 | Power distribution control method and power distribution control system |
-
2019
- 2019-06-11 CN CN201910502278.1A patent/CN110061501A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110957706A (en) * | 2019-11-26 | 2020-04-03 | 国网浙江省电力有限公司电力科学研究院 | Method for judging switching operation of distribution system without power outage |
| CN110957706B (en) * | 2019-11-26 | 2021-10-01 | 国网浙江省电力有限公司电力科学研究院 | Method for judging switching operation of distribution system without power outage |
| CN111952970A (en) * | 2020-08-17 | 2020-11-17 | 云南电网有限责任公司电力科学研究院 | Power distribution network loop closing and power adjusting method and device |
| CN111952970B (en) * | 2020-08-17 | 2024-03-19 | 云南电网有限责任公司电力科学研究院 | Method and device for closing loop and regulating electricity of power distribution network |
| CN116345694B (en) * | 2023-05-08 | 2024-02-06 | 江西嘉鸣科技电子有限公司 | Power distribution control method and power distribution control system |
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