CN208337179U - A kind of grid-connected cabinet - Google Patents
A kind of grid-connected cabinet Download PDFInfo
- Publication number
- CN208337179U CN208337179U CN201821075206.0U CN201821075206U CN208337179U CN 208337179 U CN208337179 U CN 208337179U CN 201821075206 U CN201821075206 U CN 201821075206U CN 208337179 U CN208337179 U CN 208337179U
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- Prior art keywords
- grid
- breaker
- coil
- circuit
- intermediate relay
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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- Keying Circuit Devices (AREA)
Abstract
The utility model relates to a kind of grid-connected cabinets, including control circuit, control circuit includes breaker, is connected between grid side and photovoltaic side and the inspection connected when breaker disconnects has electrical circuit, it includes the normally closed node for the breaker being connected in series and the coil of time-delay relay that inspection, which has electrical circuit, and the normally opened node of time-delay relay is connected between grid side and breaker.Control circuit further includes closing circuit, sub-gate circuit；Closing circuit includes the coil of the switch knob being series between grid side and photovoltaic side and combined floodgate intermediate relay, and the normally opened node of combined floodgate intermediate relay is connected between grid side and the closing coil of breaker；Sub-gate circuit includes the coil of the opening button being series between grid side and photovoltaic side and separating brake intermediate relay, and the normally opened node of separating brake intermediate relay is connected between grid side and the opening coil of breaker.The utility model, which can be realized inspection, pressure closing function, and cost is relatively low, easy to use.
Description
Technical field
The utility model belongs to new energy field, and in particular to grid-connected used in a kind of photovoltaic power generation grid-connecting system
Cabinet.
Background technique
Control circuit in existing grid-connected cabinet is as shown in Fig. 1, it is connected between grid side and photovoltaic side, packet
Circuit breaker Q F and closing circuit, sub-gate circuit are included, wherein closing circuit includes the combined floodgate for being connected to grid side Yu circuit breaker Q F
Switch knob 2SB between coil, sub-gate circuit include the separating brake being connected between grid side and the opening coil of circuit breaker Q F
Button 1SB.
Since photovoltaic power generation low-pressure grid-connection system is generally without staff on duty, therefore it is required that the control circuit, which has inspection, pressing
Lock function, as long as detecting grid side a little, energy automatic closing makes breaker work.And existing above-mentioned control circuit is simultaneously
Not having the inspection has pressure closing function.
To solve the problems, such as automatic closing, occurs the novel breaker that built-in inspection has pressure closing function at present, but this
Novel breaker price is more expensive, for existing system, if replacing the novel breaker, and one side higher cost, another party
The face replacement cycle is longer, influences system work, also brings along economic loss.
Summary of the invention
The purpose of the utility model is to provide one kind, and there is inspection to have pressure closing function, and circuit is simple and easy, and cost is relatively low
Grid-connected cabinet.
In order to achieve the above objectives, the technical solution adopted in the utility model is:
A kind of grid-connected cabinet, including the control circuit being connected between grid side and photovoltaic side, the control circuit packet
Breaker is included, the control circuit further includes being connected between the grid side and the photovoltaic side and disconnecting in the breaker
When the inspection connected have electrical circuit, it includes the normally closed node and time-delay relay for the breaker being connected in series that the inspection, which has electrical circuit,
Coil, the normally opened node of the time-delay relay is connected between the grid side and the breaker.
Preferably, the control circuit further includes that the combined floodgate being connected between the grid side and the breaker returns
Road, sub-gate circuit；
The closing circuit includes the switch knob being series between the grid side and the photovoltaic side and closes a floodgate intermediate
The normally opened node of the coil of relay, the combined floodgate intermediate relay is connected to the closing line of the grid side Yu the breaker
Between circle；
The sub-gate circuit includes among the opening button being series between the grid side and the photovoltaic side and separating brake
The coil of relay, the normally opened node of the separating brake intermediate relay are connected to the separating brake line of the grid side Yu the breaker
Between circle.
Preferably, the normally closed node of the combined floodgate intermediate relay, the separating brake relay normally closed node be series at institute
Stating inspection has in electrical circuit.
Preferably, the normally opened node of the time-delay relay is parallel to the two of the normally opened node of the combined floodgate intermediate relay
End.
Preferably, the normally closed node of the combined floodgate intermediate relay and the opening button and the separating brake intermediate relay
Coil be connected in series.
Preferably, the normally opened node of the separating brake intermediate relay is also parallel to the both ends of the opening button.
Preferably, the control circuit further includes being connected between the grid side and the breaker to indicate breaker
The indicator light of state.
Since above-mentioned technical proposal is used, the utility model has the advantage that the utility model compared with prior art
Can be realized inspection has pressure closing function, and cost is relatively low, easy to use.
Detailed description of the invention
Attached drawing 1 is the schematic diagram of control circuit in existing grid-connected cabinet.
Attached drawing 2 is the schematic diagram of control circuit in the grid-connected cabinet of the utility model.
Specific embodiment
Embodiment shown in reference to the accompanying drawing is further described the utility model.
Embodiment one: a kind of grid-connected cabinet, including the control circuit being connected between grid side and photovoltaic side.Such as attached drawing
Shown in 2, control circuit include circuit breaker Q F, inspection have electrical circuit, closing circuit, sub-gate circuit.
Inspection has electrical circuit to be connected between grid side and photovoltaic side, can connect when circuit breaker Q F is disconnected.Inspection has electricity
Circuit includes the coil of normally closed the node QF1 and time-delay relay KT of circuit breaker Q F, and the two is connected in series and constituting inspection has electrical circuit.
The normally opened node KT2 of time-delay relay KT is connected between grid side and the closing coil of circuit breaker Q F.Time-delay relay KT's
Delay time can be set, such as be set as 10s.
Closing circuit, sub-gate circuit are connected between grid side and circuit breaker Q F.Closing circuit includes switch knob
The coil of 2SB, combined floodgate intermediate relay KA2, switch knob 2SB and combined floodgate intermediate relay KA2 are series at grid side and photovoltaic
Between side.The normally opened node KA22 of combined floodgate intermediate relay KA2 is connected between grid side and the closing coil of circuit breaker Q F.Point
Lock circuit includes the coil of opening button 1SB, separating brake intermediate relay KA1, opening button 1SB and separating brake intermediate relay KA1
It is series between grid side and photovoltaic side.The normally opened node KA12 of separating brake intermediate relay KA1 is connected to grid side and breaker
Between the opening coil of QF.Also, the normally closed node of the normally closed node KA11 of combined floodgate intermediate relay KA1, separating brake relay KA2
KA21, which is series at inspection, to be had in electrical circuit, collectively forms inspection with the coil of the normally closed node QF1 and time-delay relay KT of circuit breaker Q F
There is electrical circuit.The normally closed node KA21 of combined floodgate intermediate relay KA2 is also with opening button 1SB's and separating brake intermediate relay KA1
Coil is connected in series and positioned there between.Another normally opened node KA22 of separating brake intermediate relay KA2 is also parallel to opening button
The both ends of 1SB.
In closing circuit, the normally opened node KT2 of time-delay relay KT can be parallel to combined floodgate intermediate relay KA2's
The both ends of normally opened node KA22.
In addition, control circuit can also include being connected to the instruction for indicating circuit-breaker status between grid side and breaker
Lamp HG, HR.
In above-mentioned control circuit, the coil of time-delay relay KT, which is connected on inspection, to be had in electrical circuit, when circuit breaker Q F is in disconnected
When open state, normally closed node KA11, the combined floodgate intermediate relay of the normally closed node QF1 of circuit breaker Q F, separating brake intermediate relay KA1
The normally closed node KA21 of KA2 is in normally off.When detecting that grid side has voltage, the coil of time relay KT is obtained
Electricity, after delay, normally opened node KT2 becomes normally closed, to connect grid side and circuit breaker Q F, circuit breaker Q F is made to work.
When pressing switch knob 2SB, the coil of combined floodgate intermediate relay KA2 obtain it is electric so that its normally opened node KA22 inhales
It closes, so that the closing coil of circuit breaker Q F obtains electric realization feed motion.And when pressing opening button 1SB, relay among separating brake
The coil of device KA1 obtains electric, is attracted its normally opened node KA12, acts so that the opening coil of circuit breaker Q F obtains electric realizations separating brake.
It is connected on the normally closed node KA21 of the combined floodgate intermediate relay KA2 in sub-gate circuit, so that the separating brake when pressing switch knob 2SB
Circuit disconnects, and closing circuit and sub-gate circuit is avoided to be also turned on.
The above embodiments are only for explaining the technical ideas and features of the present invention, and its object is to allow be familiar with technique
Personage can understand the content of the utility model and implement accordingly, do not limit the protection scope of the present invention.
All equivalent change or modifications according to made by the spirit of the present invention essence, should all cover the protection scope of the utility model it
It is interior.
Claims (7)
1. a kind of grid-connected cabinet, including the control circuit being connected between grid side and photovoltaic side, the control circuit includes
Breaker, it is characterised in that: the control circuit further includes being connected between the grid side and the photovoltaic side and described
The inspection connected has an electrical circuit when breaker disconnects, the inspection have electrical circuit include the breaker being connected in series normally closed node and
The normally opened node of the coil of time-delay relay, the time-delay relay is connected between the grid side and the breaker.
2. a kind of grid-connected cabinet according to claim 1, it is characterised in that: the control circuit further includes being separately connected
Closing circuit, sub-gate circuit between the grid side and the breaker；
The closing circuit includes the switch knob being series between the grid side and the photovoltaic side and intermediate relay of closing a floodgate
The coil of device, the normally opened node of the combined floodgate intermediate relay be connected to the grid side and the breaker closing coil it
Between；
The sub-gate circuit includes relay among the opening button being series between the grid side and the photovoltaic side and separating brake
The coil of device, the normally opened node of the separating brake intermediate relay be connected to the grid side and the breaker opening coil it
Between.
3. a kind of grid-connected cabinet according to claim 2, it is characterised in that: the normally closed section of the combined floodgate intermediate relay
Point, the separating brake relay normally closed node be series at it is described inspection have in electrical circuit.
4. a kind of grid-connected cabinet according to claim 2 or 3, it is characterised in that: the normally opened section of the time-delay relay
Point is parallel to the both ends of the normally opened node of the combined floodgate intermediate relay.
5. a kind of grid-connected cabinet according to claim 2 or 3, it is characterised in that: the combined floodgate intermediate relay it is normal
Close node and the coil of the opening button and the separating brake intermediate relay are connected in series.
6. a kind of grid-connected cabinet according to claim 2 or 3, it is characterised in that: the separating brake intermediate relay it is normal
Open the both ends that node is also parallel to the opening button.
7. a kind of grid-connected cabinet according to claim 1, it is characterised in that: the control circuit further includes being connected to institute
State the indicator light that the circuit-breaker status is indicated between grid side and the breaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821075206.0U CN208337179U (en) | 2018-07-09 | 2018-07-09 | A kind of grid-connected cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821075206.0U CN208337179U (en) | 2018-07-09 | 2018-07-09 | A kind of grid-connected cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208337179U true CN208337179U (en) | 2019-01-04 |
Family
ID=64786488
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821075206.0U Active CN208337179U (en) | 2018-07-09 | 2018-07-09 | A kind of grid-connected cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208337179U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110336314A (en) * | 2019-05-29 | 2019-10-15 | 湖北中科能能源技术有限公司 | A kind of photovoltaic power generation 10kv grid-connection cabinet system |
| CN111509667A (en) * | 2020-05-29 | 2020-08-07 | 常州佳讯光电***工程有限公司 | Undervoltage protection control device matched with distributed photovoltaic grid-connected switch |
-
2018
- 2018-07-09 CN CN201821075206.0U patent/CN208337179U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110336314A (en) * | 2019-05-29 | 2019-10-15 | 湖北中科能能源技术有限公司 | A kind of photovoltaic power generation 10kv grid-connection cabinet system |
| CN111509667A (en) * | 2020-05-29 | 2020-08-07 | 常州佳讯光电***工程有限公司 | Undervoltage protection control device matched with distributed photovoltaic grid-connected switch |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |