CN109888779A - A kind of 400V power supply-distribution system controllably powered automatically - Google Patents
A kind of 400V power supply-distribution system controllably powered automatically Download PDFInfo
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- CN109888779A CN109888779A CN201910209163.3A CN201910209163A CN109888779A CN 109888779 A CN109888779 A CN 109888779A CN 201910209163 A CN201910209163 A CN 201910209163A CN 109888779 A CN109888779 A CN 109888779A
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- pressure side
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- breaker
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
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Abstract
The present invention relates to a kind of 400V power supply-distribution systems controllably powered automatically, including two sections of medium voltage sides and machine bus, the end of incoming cables of every section of medium voltage side and machine bus with diesel-driven generator and 10kV alternating current by being connected respectively after breaker, network interconnecting circuit and isolated hand car are connected between two sections of medium voltage sides and machine bus, the leading-out terminal of two sections of medium voltage sides and machine bus respectively passes sequentially through breaker respectively, it is connected after transformer and low-pressure side breaker with two sections of low-pressure side bus, low-pressure side network interconnecting circuit there are two being also connected between two sections of low-pressure side bus, two low-pressure side network interconnecting circuits and it is connected to two sections of medium voltage sides and the low-pressure side breaker of the leading-out terminal of machine bus is connected with programmable logic controller (PLC) PLC, feeder line extremely loads after the leading-out terminal of two sections of low-pressure side bus passes through low-pressure side breaker.Compared with prior art, the present invention has many advantages, such as energy conservation, powers flexible.
Description
Technical field
The present invention relates to electrical power supply and distribution technical fields, more particularly, to a kind of 400V power supply and distribution system controllably powered automatically
System.
Background technique
Reliably, reasonably 400V electric power safeguard system strategy is to guarantee that electric system can get around failure in failure automatically
Point continues to where the core of important load normal power supply.
The electrical power distribution system more demanding for important, complicated, power supply continuity needs in the event of a failure certainly
Dynamic switching route, bypass fault point continues to power in time, a kind of various events for being likely to occur in electrical power distribution system
Barrier operating condition simultaneously provides the mesolow side distribution system of solution and urgently develops.
Summary of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of automatic controllable power supplies
400V power supply-distribution system.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of 400V power supply-distribution system controllably powered automatically, including two sections of medium voltage sides and machine bus, every section of medium pressure
The end of incoming cables of side and machine bus with diesel-driven generator and 10kV alternating current by being connected respectively after breaker, two sections of medium pressure sides
And network interconnecting circuit and isolated hand car are connected between machine bus, the leading-out terminal difference of two sections of medium pressure sides and machine bus is respective
It is connected after passing sequentially through the breaker, transformer and low-pressure side breaker with two sections of low-pressure side bus, two sections of low pressure
It is also connected between side bus there are two low-pressure side network interconnecting circuit, two low-pressure side network interconnecting circuits and is connected to two sections of institutes
The low-pressure side breaker for stating medium voltage side and the leading-out terminal of machine bus is connected with programmable logic controller (PLC) PLC, and two sections
The leading-out terminal of the low-pressure side bus passes through feeder line after the low-pressure side breaker to load.
Further, model S7-300 or S7-400 used by the programmable logic controller (PLC) PLC.
Further, the coil ratio of the transformer is 25:1.
Further, the transformer is dry-type transformer.
Further, the diesel-driven generator is made of diesel engine, generator, fuel tank, battery, the generator by
Cylinder, piston, cylinder head, inlet valve, exhaust valve and piston pin are constituted.
Further, medium pressure side and machine bus and the low-pressure side bus by flat rectangular body shape copper bar or aluminium
Row is made.
Compared with prior art, the invention has the following advantages that
(1) energy saving, the 400V power supply-distribution system in the present invention includes two sections of medium voltage sides simultaneously machine bus, every section of medium voltage side and machine
The end of incoming cables of bus by being connected respectively with diesel-driven generator and 10kV alternating current after breaker, two sections of medium voltage sides and machine bus it
Between be connected with network interconnecting circuit and isolated hand car, the leading-out terminal of two sections of medium voltage sides and machine bus respectively passes sequentially through open circuit respectively
It is connected after device, transformer and low-pressure side breaker with two sections of low-pressure side bus, is also connected with two between two sections of low-pressure side bus
A low-pressure side network interconnecting circuit, two low-pressure side network interconnecting circuits are low with the leading-out terminal for being connected to two sections of medium voltage sides and machine bus
Pressure side breaker is connected with programmable logic controller (PLC) PLC, and the leading-out terminal of two sections of low-pressure side bus passes through low-pressure side open circuit
Feeder line can flexibly power for the power supply-distribution system of 400V, be more energy-saving and environmentally friendly to loading after device.
(2) power supply is flexible, the 400V distribution system in the present invention, due to taking circuit breaker multiple levels, and with symmetrical bus
It is attached, breaker can be adjusted according to user demand and actual condition, in certain loading range, power supply is flexible,
More practical and actual complicated power utilization environment.
Detailed description of the invention
Fig. 1 is overall structure diagram of the invention；
In figure, 1, medium voltage side and machine bus；2, breaker；3, network interconnecting circuit；4, isolated hand car；5, transformer；6, low
Press side breaker；7, low-pressure side bus；8, low-pressure side network interconnecting circuit；9, programmable logic controller (PLC) PLC.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiment is a part of the embodiments of the present invention, rather than whole embodiments.Based on this hair
Embodiment in bright, those of ordinary skill in the art's every other reality obtained without making creative work
Example is applied, all should belong to the scope of protection of the invention.
Embodiment
As shown in Figure 1 be the corresponding embodiment of technical solution of the present invention, the power supply-distribution system include two sections of medium voltage sides simultaneously
The end of incoming cables of machine bus 1, every section of medium voltage side and machine bus 1 by after breaker 2 respectively with diesel-driven generator and 10kV alternating current phase
Connection is connected with network interconnecting circuit 3 and isolated hand car 4, two sections of medium voltage sides and machine bus 1 between two sections of medium voltage sides and machine bus 1
Leading-out terminal respectively pass sequentially through breaker, transformer 5 and low-pressure side breaker 6 respectively after be connected with two sections of low-pressure side bus 7
It connects, transformer 5 can select dry-type transformer or oil-immersed transformer, be also connected between two sections of low-pressure side bus 7 there are two low
Side network interconnecting circuit 8 is pressed, two low-pressure side network interconnecting circuits 8 are low with the leading-out terminal for being connected to two sections of medium voltage sides and machine bus 1
Pressure side breaker 6 is connected with programmable logic controller (PLC) PLC9, model S7-300 or S7-400 used by PLC9, and two
The leading-out terminal of section low-pressure side bus 7 by feeder line after low-pressure side breaker 6 to loading, diesel-driven generator by diesel engine, generator,
Fuel tank, battery composition, generator are made of cylinder, piston, cylinder head, inlet valve, exhaust valve and piston pin.
In the present embodiment, model S7-300 used by PLC9, the coil ratio of transformer 5 is 25:1, concrete kind
Type is that dry-type transformer, medium voltage side and machine bus 1 are made with low-pressure side bus 7 of copper bar or the aluminium row of flat rectangular body shape.
The following are the analyses of the specific work process of technical solution of the present invention:
As shown in Figure 1, performing an analysis by taking transformer group TA and TB as an example, the switch logic of remaining transformer group is herewith.?
When normal operation, transformer TA and TB are mutually backups, and are segmented below each comfortable 50% load factor and run alone, if a wherein change
Depressor power supply output failure (include: 10kV bus-bar fault, 10kV network interconnecting circuit failure, transformer inlet wire failure, transformer from
Die barrier or low pressure incoming breaker faults itself etc.), in addition a transformer will undertake whole end loads.QF1~QF4 tetra-
Interlocking between platform breaker controlled by programmable logic controller (PLC) (PLC), it can be achieved that a whole set of low-voltage distribution system from
Throw runback, from pitcher is multiple and manually switching, reset function.
When normal operation, two-way 10kV alternating current gives transformer TA and TB to power respectively, two transformer sectional independent operatings,
It is mutually backups.Low pressure total input-wire circuit breaker Q F1 and QF2 are in "on" position, and low voltage liaison net circuit breaker Q F3 is in separating brake shape
State, QF4 are in "on" position.Wherein QF1~QF3 band GPF (General Protection False function, (this switch is only in QF3 event without defencive function by QF4
When barrier maintenance, two sections of low-voltage bus bars are separated, play buffer action).
1 low-voltage circuit breaker operating status list of table
Operational mode is to answer from pitcher, when TA transformer low voltage power supply output failure, the output of its 0.4kV low-pressure side is caused to lose
Pressure (judgment basis is for low pressure incoming breaker QF1 upper port without pressure, without stream), then decompression side total input-wire circuit breaker Q F1 should be certainly
Dynamic separating brake, after determining that QF1 has been in quartile, be delayed t1, then automatically engages combined floodgate operation by PLC control network interconnecting circuit QF3.
When TA transformer restores electricity, total input-wire circuit breaker Q F1 front-end detection device detection and confirmation input end voltage is
Normally, it is delayed after t2, order tripping network interconnecting circuit QF3 is sent by PLC.After determining that QF3 is in quartile, be delayed t3, then by
PLC control total input-wire circuit breaker Q F1 automatically engages combined floodgate operation.
When TB transformer low voltage power supply export failure, cause its 0.4kV low-pressure side output decompression (judgment basis be low pressure into
Line circuit breaker Q F2 upper port without pressure, without stream), then decompression side total input-wire circuit breaker Q F2 answers automatic brake separating, when determining that QF2 located
After quartile, be delayed t2, then automatically engages combined floodgate operation by PLC control network interconnecting circuit QF3.
When TB transformer restores electricity, total input-wire circuit breaker Q F2 front-end detection device detection and confirmation input end voltage is
Normally, it is delayed after t2, order tripping network interconnecting circuit QF3 is sent by PLC.After determining that QF3 is in quartile, be delayed t3, then by
PLC control total input-wire circuit breaker Q F2 automatically engages combined floodgate operation.
When TA and TB transformer breaks down simultaneously or when power down, causes the 0.4kV low-pressure side of this two transformer groups same
When export decompression, then QF1, QF2 automatic brake separating, QF3 keeps former gate-dividing state.When this two transformers restore electricity,
By manually closing a floodgate, QF3 still keeps former gate-dividing state by QF1, QF2.If TA and TB transformer restored electricity there are the time difference,
Then restored by following logic:
1.TA transformer first restores electricity, the detection of total input-wire circuit breaker Q F1 front-end detection device and confirmation input end voltage
Normally, it is delayed after t3, combined floodgate operation is automatically engaged by PLC control total input-wire circuit breaker Q F1, after determining that QF2 is in quartile,
Be delayed t1, then automatically engages combined floodgate operation by PLC control network interconnecting circuit QF3.Then, TB transformer also restores electricity, always into
Simultaneously confirmation input end voltage is normal for the detection of line circuit breaker Q F2 front-end detection device, is delayed after t2, sends order tripping by PLC
Network interconnecting circuit QF3.After determining that QF3 is in quartile, be delayed t3, then automatically engages conjunction by PLC control total input-wire circuit breaker Q F2
Lock operation.
2.TB transformer first restores electricity, the detection of total input-wire circuit breaker Q F2 front-end detection device and confirmation input end voltage
Normally, it is delayed after t3, combined floodgate operation is automatically engaged by PLC control total input-wire circuit breaker Q F2, after determining that QF1 is in quartile,
Be delayed t1, then automatically engages combined floodgate operation by PLC control network interconnecting circuit QF3.Then, TA transformer also restores electricity, always into
Simultaneously confirmation input end voltage is normal for the detection of line circuit breaker Q F1 front-end detection device, is delayed after t2, sends order tripping by PLC
Network interconnecting circuit QF3.After determining that QF3 is in quartile, be delayed t3, then automatically engages conjunction by PLC control total input-wire circuit breaker Q F1
Lock operation.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can readily occur in various equivalent modifications or replace
It changes, these modifications or substitutions should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with right
It is required that protection scope subject to.
Claims (6)
1. a kind of 400V power supply-distribution system for controllably powering automatically, which is characterized in that including two sections of medium voltage sides and machine bus (1),
Every section of medium pressure side and the end of incoming cables of machine bus (1) by after breaker (2) respectively with diesel-driven generator and 10kV alternating current phase
Be connected with network interconnecting circuit (3) and isolated hand car (4) between connection, two sections of medium pressure sides and machine bus (1), two sections it is described in
The leading-out terminal of pressure side and machine bus (1) respectively passes sequentially through the breaker, transformer (5) and low-pressure side breaker (6) respectively
It is connected afterwards with two sections of low-pressure side bus (7), is also connected with to get in touch with there are two low-pressure side between two sections of low-pressure side bus (7) and break
Road device (8), two low-pressure side network interconnecting circuits (8) and the leading-out terminal for being connected to two sections of medium pressure sides and machine bus (1)
The low-pressure side breaker (6) be connected with programmable logic controller (PLC) PLC (9), two sections of low-pressure side bus (7)
By the low-pressure side breaker (6), feeder line extremely loads leading-out terminal afterwards.
2. a kind of 400V power supply-distribution system controllably powered automatically according to claim 1, which is characterized in that described can
Model S7-300 or S7-400 used by programmed logic controller PLC (9).
3. a kind of 400V power supply-distribution system controllably powered automatically according to claim 1, which is characterized in that the transformation
The coil ratio of device (5) is 25:1.
4. a kind of 400V power supply-distribution system controllably powered automatically according to claim 1, which is characterized in that the transformation
Device (5) is dry-type transformer.
5. a kind of 400V power supply-distribution system controllably powered automatically according to claim 1, which is characterized in that the diesel oil
Generator is made of diesel engine, generator, fuel tank, battery, the generator by cylinder, piston, cylinder head, inlet valve,
Exhaust valve and piston pin are constituted.
6. a kind of 400V power supply-distribution system controllably powered automatically according to claim 1, which is characterized in that medium pressure
Side and machine bus (1), which are arranged with the low-pressure side bus (7) by the copper bar or aluminium of flat rectangular body shape, to be made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910209163.3A CN109888779A (en) | 2019-03-19 | 2019-03-19 | A kind of 400V power supply-distribution system controllably powered automatically |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910209163.3A CN109888779A (en) | 2019-03-19 | 2019-03-19 | A kind of 400V power supply-distribution system controllably powered automatically |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109888779A true CN109888779A (en) | 2019-06-14 |
Family
ID=66933041
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910209163.3A Pending CN109888779A (en) | 2019-03-19 | 2019-03-19 | A kind of 400V power supply-distribution system controllably powered automatically |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109888779A (en) |
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2019
- 2019-03-19 CN CN201910209163.3A patent/CN109888779A/en active Pending
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