CN208522468U - A kind of low-voltage distribution interlocking protective system - Google Patents
A kind of low-voltage distribution interlocking protective system Download PDFInfo
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- CN208522468U CN208522468U CN201820643177.7U CN201820643177U CN208522468U CN 208522468 U CN208522468 U CN 208522468U CN 201820643177 U CN201820643177 U CN 201820643177U CN 208522468 U CN208522468 U CN 208522468U
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- cabinet
- incoming line
- filter
- transformer
- transformer circuit
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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
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Abstract
The utility model discloses a kind of low-voltage distribution interlocking protective systems; including the first transformer circuit, the second transformer circuit; pass through mother cabinet F connection between first transformer circuit and the second transformer circuit; first transformer circuit includes the first transformer, incoming line cabinet A, filter cabinet C, load; first transformer is connected through incoming line cabinet A and load, and filter cabinet C is for compensating the harmonic wave loaded in the first transformer circuit；Second transformer circuit includes the second transformer, incoming line cabinet K, filter cabinet I, second transformer is connected through incoming line cabinet K and load, filter cabinet I is for compensating the harmonic wave loaded in the second transformer circuit, setting is interlocked between incoming line cabinet A and filter cabinet C, so that filter cabinet C follows the unlatching of incoming line cabinet A to be closed and synchronize unlatching closure；Setting is interlocked between incoming line cabinet K and filter cabinet I, so that filter cabinet I is closed according to the unlatching of incoming line cabinet K and synchronizes unlatching closure.The utility model avoids Harmonics amplification in power grid, makes electric power netting safe running.
Description
Technical field
The utility model relates to low-voltage distribution system field, in particular to a kind of low-voltage distribution interlocking protective system.
Background technique
For the principle of prior art low-voltage distribution system as shown in Figure 1, in Fig. 1, QF1 is the first transformer incoming line cabinet A's
Breaker, QF2 are the breaker of the second transformer incoming line cabinet K, and QF3 is the breaker of mother cabinet F, and B, J are capacitor box, and C, I are
Filter cabinet, D to E, G to H are load cabinet.When normal use, the circuit breaker Q F3 disjunction of mother cabinet F, filter cabinet C compensates load cabinet
D, the harmonic wave that load cabinet E is generated, the harmonic wave that filter cabinet I compensation load cabinet H is generated to load cabinet G, current transformer M, electric current are mutual
Sensor N is respectively the sampling current transformer of filter cabinet C, filter cabinet I, for acquiring current signal.The inlet wire of current transformer M
End is towards circuit breaker Q F1, and the end of incoming cables of current transformer N is towards QF2.When the circuit breaker Q F3 disjunction of mother cabinet, filter cabinet C, filter
The wave cabinet I respectively respective load of filtering compensation.But when incoming line cabinet A or K have a power failure, for example A has a power failure, and mother cabinet F is thrown
Enter, current transformer M current sample is reversed at this time, although incoming line cabinet A, all without electric current, filter cabinet C has capacitor box B
Itself electric current (3.6A or so), compensation was enhanced to itself maximum current of filter cabinet C, harmonic wave at 5 seconds or so for positive feedback at this time
Electric current seriously amplifies, and such as cuts off filter cabinet C not in time, be easy to cause mains breakdown.Conversely, when incoming line cabinet K has a power failure, filter cabinet I
It is easy to cause Harmonics amplification.This low-voltage distribution system seriously affects filter effect, or even cause power grid because of harmonic wave if do not improved
Amplify and collapses.
Utility model content
The purpose of the utility model is to overcome the deficiencies in the prior art, provide a kind of low-voltage distribution interlocking protective system,
Harmonics amplification is prevented, the accuracy of filtering is improved.
To achieve the goals above, the technical solution adopted in the utility model are as follows: a kind of low-voltage distribution interlocking protective system,
Including the first transformer circuit, the second transformer circuit, pass through between first transformer circuit and the second transformer circuit
The F connection of mother cabinet, first transformer circuit include the first transformer, incoming line cabinet A, filter cabinet C, load, and described first becomes
Depressor is connected through incoming line cabinet A and load, and the filter cabinet C is for compensating the harmonic wave loaded in the first transformer circuit；Described
Two transformer circuits include the second transformer, incoming line cabinet K, filter cabinet I, load, and second transformer is through incoming line cabinet K and load
Connection, the filter cabinet I join between the incoming line cabinet A and filter cabinet C for compensating the harmonic wave loaded in the second transformer circuit
Lock setting, so that the filter cabinet C follows the unlatching of incoming line cabinet A to be closed and synchronize and carry out unlatching closure；The incoming line cabinet K and filter
Setting is interlocked between wave cabinet I, so that filter cabinet I is closed according to the unlatching of incoming line cabinet K and synchronizes and carry out unlatching closure.
The power unit module of the filter cabinet C passes through the first stop button TA1 and control power supply composition the first control electricity
The power unit module of resource loop, the filter cabinet I passes through the second stop button TA2 and control power supply composition the second control power supply
Circuit；Setting is interlocked between incoming line cabinet A and filter cabinet C are as follows: concatenate the normally opened auxiliary contact K1 of the circuit breaker Q F1 of incoming line cabinet A
In the first control electric power loop；Setting is interlocked between incoming line cabinet K and filter cabinet I are as follows: by the normal of the circuit breaker Q F2 of incoming line cabinet K
Auxiliary contact K2 is opened to be serially connected in second source control loop.
Utility model has the advantages that by setting interlocking so that filter cabinet follows the work of incoming line cabinet to work, from
And avoid incoming line cabinet have a power failure and filter cabinet still work when the effect of filter and amplification that generates, provide the filtering effect of system
Fruit, it is therefore prevented that Harmonics amplification improves the accuracy of filtering.
Detailed description of the invention
Below to each width attached drawing of the utility model specification expression content and figure in label be briefly described:
Fig. 1 is prior art In the distribution system of low voltage schematic illustration；
Fig. 2 is the interlocking setting principle figure of the utility model filter cabinet C and incoming line cabinet A；
Fig. 3 is the interlocking setting principle figure of the utility model filter cabinet I and incoming line cabinet K.
Specific embodiment
Specific embodiment of the present utility model is made into one by the description to optimum embodiment below against attached drawing
Step detailed description.
As shown in Figure 1, being the low-voltage network system of the prior art, including two circuits, the first transformer circuit, second
Transformer circuit, the first transformer circuit include the first transformer, incoming line cabinet A, capacitor box B, filter cabinet C, load, and load includes
Load cabinet D and E, the second transformer circuit include the second transformer, incoming line cabinet K, capacitor box J, filter cabinet I, load, and load includes
Load cabinet H to load cabinet G；Two circuits pass through mother cabinet F connection；First transformer is through incoming line cabinet A, capacitor box B, filter cabinet C
Connection load afterwards, filter cabinet C is for compensating the harmonic wave loaded in the first transformer circuit；Second transformer is through incoming line cabinet K, capacitor
Cabinet J, filter cabinet I connection load, filter cabinet I is for compensating the harmonic wave loaded in the second transformer circuit.In order to reduce due into
When one of line cabinet A or incoming line cabinet K are powered off, mother cabinet F investment, filter cabinet can generate Harmonics amplification at this time, cause power supply electricity
Collapse of net etc. is safely operated problem, in order to solve these problems, is arranged interlocking between incoming line cabinet A and filter cabinet C, so that institute
Stating filter cabinet C follows the unlatching of incoming line cabinet A to be closed and synchronize and carry out unlatching closure；Interlocking between incoming line cabinet K and filter cabinet I is set
It sets, so that filter cabinet I is closed according to the unlatching of incoming line cabinet K and synchronizes and carry out unlatching closure.
Interlocking setting uses electric interlock mode, and the normally opened auxiliary contact of incoming line cabinet inner breaker are serially connected in filter cabinet function
Rate module, stop button, control power supply composition control electric power loop in, in this way in the case where incoming line cabinet has a power failure,
The corresponding breaker of incoming line cabinet disconnects, and normally opened auxiliary contact disconnect the control electric power loop of filter cabinet, so that filter cabinet
Power-off stops working, to have the function that prevent Harmonics amplification.After the breaker of incoming line cabinet has electricity to close a floodgate, normally opened auxiliary touching
The control electric power loop of point closure, the power unit module of filter cabinet is powered, and filter cabinet automatically begins to work.
As shown in Figure 2,3, the power unit module of filter cabinet C by the first stop button TA1 and control power supply L, N (or
Person 380V controls power supply) the first control electric power loop is formed, the power unit module of filter cabinet I passes through the second stop button TA2
With control power supply L, N composition the second control electric power loop, the normally opened auxiliary contact K1 of the circuit breaker Q F1 of incoming line cabinet A is serially connected in
In first control electric power loop；The normally opened auxiliary contact K2 of the circuit breaker Q F2 of incoming line cabinet K is serially connected in second source control loop
In.Using above-mentioned interlock, so that after the circuit breaker Q F1 of incoming line cabinet A is disconnected, that is, when the power-off of incoming line cabinet cabinet, open circuit
The normally opened auxiliary contact K1 of device QF1 is in an off state, and the first control electric power loop disconnects at this time, and filter cabinet C stops working；When
When circuit breaker Q F1 is closed, that is, incoming line cabinet work once electrified, the normally opened auxiliary contact K1 closure of circuit breaker Q F1, the first control at this time
Electric power loop processed is powered to forming electric loop, and filter cabinet follows work automatically at this time.It avoids to power off in incoming line cabinet A in this way
When, the Harmonics amplification effect of filter cabinet C ensure that the safe operation of power grid, similarly be arranged between incoming line cabinet K and filter cabinet I
Corresponding interlocking ensure that filter cabinet I is automatically stopped work, closes in circuit breaker Q F2 when the circuit breaker Q F2 of incoming line cabinet K disconnection
When conjunction, normally opened auxiliary contact K2 closure, filter cabinet I follows work automatically.
Obvious the utility model specific implementation is not subject to the restrictions described above, as long as using method concept of the invention
The improvement of the various unsubstantialities carried out with technical solution, it is within the scope of the present invention.
Claims (2)
1. a kind of low-voltage distribution interlocking protective system, including the first transformer circuit, the second transformer circuit, first transformation
By mother cabinet F connection between device circuit and the second transformer circuit, first transformer circuit including the first transformer, into
Line cabinet A, filter cabinet C, load, first transformer are connected through incoming line cabinet A and load, and the filter cabinet C is for compensating first
The harmonic wave loaded in transformer circuit；Second transformer circuit includes the second transformer, incoming line cabinet K, filter cabinet I, loads,
Second transformer through incoming line cabinet K and load connect, the filter cabinet I for compensate loaded in the second transformer circuit it is humorous
Wave, it is characterised in that: setting is interlocked between the incoming line cabinet A and filter cabinet C, so that the filter cabinet C follows opening for incoming line cabinet A
Opening and closing closes and synchronizes and carry out unlatching closure；Setting is interlocked between the incoming line cabinet K and filter cabinet I, so that filter cabinet I is according to inlet wire
The unlatching of cabinet K is closed and synchronizes and carry out unlatching closure.
2. a kind of low-voltage distribution interlocking protective system as described in claim 1, it is characterised in that: the power of the filter cabinet C
Unit module passes through the first stop button TA1 and control power supply composition the first control electric power loop, the power list of the filter cabinet I
Element module passes through the second stop button TA2 and control power supply composition the second control electric power loop；Between incoming line cabinet A and filter cabinet C
Interlocking setting are as follows: the normally opened auxiliary contact K1 of the circuit breaker Q F1 of incoming line cabinet A is serially connected in the first control electric power loop；Inlet wire
Setting is interlocked between cabinet K and filter cabinet I are as follows: the normally opened auxiliary contact K2 of the circuit breaker Q F2 of incoming line cabinet K is serially connected in second source
In control loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820643177.7U CN208522468U (en) | 2018-05-02 | 2018-05-02 | A kind of low-voltage distribution interlocking protective system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820643177.7U CN208522468U (en) | 2018-05-02 | 2018-05-02 | A kind of low-voltage distribution interlocking protective system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208522468U true CN208522468U (en) | 2019-02-19 |
Family
ID=65341466
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820643177.7U Active CN208522468U (en) | 2018-05-02 | 2018-05-02 | A kind of low-voltage distribution interlocking protective system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208522468U (en) |
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2018
- 2018-05-02 CN CN201820643177.7U patent/CN208522468U/en active Active
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