CN206471836U - A kind of photovoltaic case becomes night from disengaging power network energy-saving cabinet and photovoltaic generating system - Google Patents
A kind of photovoltaic case becomes night from disengaging power network energy-saving cabinet and photovoltaic generating system Download PDFInfo
- Publication number
- CN206471836U CN206471836U CN201720106156.7U CN201720106156U CN206471836U CN 206471836 U CN206471836 U CN 206471836U CN 201720106156 U CN201720106156 U CN 201720106156U CN 206471836 U CN206471836 U CN 206471836U
- Authority
- CN
- China
- Prior art keywords
- photovoltaic
- energy
- bypass
- power network
- saving cabinet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- 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
Abstract
The utility model is related to a kind of photovoltaic case and becomes night from disengaging power network energy-saving cabinet and photovoltaic generating system, the main contactor (JZ1) for connecting the change of photovoltaic case and power network is provided with energy-saving cabinet therein, the two ends of main contactor (JZ1) are parallel with bypass, and string is provided with bypass contactor (JZ2) and bypass high-power resistance (R) in the bypass.The utility model is by becoming the two ends bypass in parallel with the main contactor of power network in connection photovoltaic case, string is provided with bypass contactor and bypass high-power resistance in also bypassing, and effectively inhibits and is cutting off or putting into excitation surge current caused when photovoltaic case becomes and switching overvoltage.
Description
Technical field
The utility model is related to a kind of photovoltaic case and becomes night from power network energy-saving cabinet and photovoltaic generating system is departed from, and belongs to high
Press transmission facility technical field.
Background technology
No matter from the world or from the point of view of China, conventional energy resource is all that very limited, Chinese disposable energy reserves is remote
Far below the 10% of the average level in the world, only about world's gross reserves.Solar energy is that the mankind are inexhaustible
Regenerative resource, has the advantages that sufficient spatter property, relative popularity, the abundance of resource and potential economy,
There is critical role in long-term energy strategy.Chinese solar energy power generating development potentiality is huge, coordinates actively stable political affairs
Plan is helped, and Chinese solar energy power generating has welcome the rapid growth of a new round, and has attracted more Strategic Investor to incorporate
To this industry.
As large-sized photovoltaic grid-connected system rises in various regions, optimization design, the efficiency for improving photovoltaic system, reduction fortune
It is to be related to the key factor that can photovoltaic plant get a profit to seek cost.Wherein reduction photovoltaic generating system equipment own loss is to carry
The effective ways of high generation efficiency.
In grid-connected photovoltaic system, photovoltaic case becomes as one of key equipment, and its operational efficiency obtains common concern,
Because only that 2 ‰ inefficient also brings along significant economic benefit.The maximum feature that photovoltaic case becomes is to locate completely at night
In no-load running state, now power network is equivalent to the power supply of transformer, transformer absorption grid power.With the grid-connected hairs of 1MW
Exemplified by electric system, the 35KV transformers that one capacity of configuration is 1250KVA, its open circuit loss is about 2500W, annual power consumption
About 9125 degree.Transformer with common electricity consumer is different, and photovoltaic system is that can depart from main power network to avoid this at night
A little open circuit losses, but can cause switching overvoltage and excitation surge current when frequently suiting no-load transformer, to breaker and transformation
Device insulation causes damage, causes equipment fault or reduces the service life of equipment.Because this problem could not be solved very well, at present
The box type transformer of photovoltaic generating system is constantly in no-load running state, causes unnecessary loss.
Utility model content
The purpose of this utility model is to provide a kind of photovoltaic case and becomes night from disengaging power network energy-saving cabinet and photovoltaic generation system
System, causes switching overvoltage and excitation surge current for solving frequently to suit when unloaded photovoltaic case becomes, exhausted to breaker and transformer
Edge causes to damage this technical problem.
In order to solve the above technical problems, the utility model and there is provided a kind of photovoltaic case become night from depart from power network energy-conservation
Cabinet, including following scheme：
Energy-saving cabinet scheme one：The main contactor (JZ1) for connecting the change of photovoltaic case and power network, institute are provided with the energy-saving cabinet
The two ends for stating main contactor (JZ1) are parallel with bypass, and string is provided with bypass contactor (JZ2) in the bypass and bypasses high-power electricity
Hinder (R).
Energy-saving cabinet scheme two：On the basis of energy-saving cabinet scheme one, it is additionally provided with the energy-saving cabinet for connecting power network
The bus bar side charged display device (DXN1) of side bus.
Energy-saving cabinet scheme three, four：Respectively on the basis of energy-saving cabinet scheme one, two, electricity is additionally provided with the energy-saving cabinet
Current transformer (LH), the current transformer (LH) is used between the main contactor (JZ1) and photovoltaic case become.
Energy-saving cabinet scheme five, six：Respectively on the basis of energy-saving cabinet scheme one, two, use is additionally provided with the energy-saving cabinet
The arrester (F) become in connection photovoltaic case.
Energy-saving cabinet scheme seven, eight：Respectively on the basis of energy-saving cabinet scheme one, two, use is additionally provided with the energy-saving cabinet
The line side charged display device (DXN2) become in connection photovoltaic case.
The utility model additionally provides a kind of photovoltaic generating system, including following scheme：
System schema one：Including photovoltaic module, header box, DC inversion and energy-saving cabinet, it is provided with the energy-saving cabinet
Main contactor (JZ1) for connecting the change of photovoltaic case and power network, the two ends of the main contactor (JZ1) are parallel with bypass, described
String is provided with bypass contactor (JZ2) and bypass high-power resistance (R) in bypass.
System schema two：On the basis of system schema one, it is additionally provided with the energy-saving cabinet female for connecting grid side
The bus bar side charged display device (DXN1) of line.
System schema three, four：It is mutual that electric current is additionally provided with respectively on the basis of system schema one, two, in the energy-saving cabinet
Sensor (LH), the current transformer (LH) is between the main contactor (JZ1) and photovoltaic case become.
System schema five, six：Respectively on the basis of system schema one, two, connection light is additionally provided with the energy-saving cabinet
Lie prostrate the arrester (F) that case becomes.
System schema seven, eight：Respectively on the basis of system schema one, two, connection light is additionally provided with the energy-saving cabinet
Lie prostrate the line side charged display device (DXN2) that case becomes.
The beneficial effects of the utility model are：By becoming the two ends parallel connection one with the main contactor of power network in connection photovoltaic case
Bar is bypassed, and is gone here and there in the bypass provided with bypass contactor and bypass high-power resistance, when needing photovoltaic case becoming the main power network of disengaging,
Bypass contactor is first closed, main contactor is then safely separated, bypass contactor is finally divided again, due to bypass high-power resistance
Effect, it is suppressed that caused excitation surge current and switching overvoltage when the unloaded photovoltaic case of excision becomes, completes the soft of system and opens
Dynamic operation；When needing photovoltaic case becoming the main power network of connection, bypass contactor is first closed, main contactor is then closed, again finally
Divide bypass contactor, due to bypassing the effect of high-power resistance, it is suppressed that put into excitation surge current caused when photovoltaic case becomes
And switching overvoltage, complete the soft of system and stop operation.
Brief description of the drawings
Fig. 1 is that photovoltaic case becomes night from the circuit theory diagrams departed from inside power network energy-saving cabinet；
Fig. 2 is that photovoltaic case becomes night from the structure chart for departing from power network energy-saving cabinet.
Embodiment
Below in conjunction with the accompanying drawings and specific embodiment is described in further detail to the utility model.
Photovoltaic generating system includes photovoltaic module, header box, DC inversion and photovoltaic case and becomes night from disengaging power network section
Energy cabinet, energy-saving cabinet therein is located at photovoltaic case and become between output end and power network, and its internal circuit theory diagrams is as shown in Figure 1.Its
In, main contactor JZ1 is used to connect the change of photovoltaic case and 35KV power networks, naturally it is also possible to be the power network of other voltage class, for example
10KV power networks.Main contactor JZ1 two ends are parallel with bypass, and string is provided with bypass contactor JZ2 in the bypass and bypasses high-power
Resistance R.Specifically, bypass high-power resistance R resistance size can become caused when putting into or cutting off encourage according to photovoltaic case
The factors such as magnetic shoves, switching overvoltage are determined.
In addition, being additionally provided with the bus bar side charged display device DXN1 for connecting power network side bus in energy-saving cabinet.Specifically
, bus bar side charged display device DXN1 one end can connect power network side bus, and the other end is directly connected to earth terminal in cabinet.It is main
Contactor JZ1 and photovoltaic case are provided with current transformer LH between becoming.It is additionally provided with energy-saving cabinet for connecting keeping away for photovoltaic case change
Thunder device F and line side charged display device DXN2.Specifically, arrester F one end is used to connect the change of photovoltaic case, the other end is direct
Earth terminal in connecting cabinet, for consuming circuit overcurrent；Line side charged display device DXN2 one end is used to connect photovoltaic case
Become, the other end is directly connected to earth terminal in cabinet.It is as shown in Figure 2 from the structure chart for departing from power network energy-saving cabinet that photovoltaic case becomes night.
Night photovoltaic system stops generating electricity, and photovoltaic case, which becomes, to be needed to depart from main power network, is absorbed with avoiding photovoltaic case from becoming from power network
Power, causes electric energy loss.Now, first control closure is in series with after high-power resistance R bypass contactor JZ2, then safety
Main contactor JZ1 is separated, bypass contactor JZ2 is finally divided again.Due to high-power resistance R effect, it is suppressed that excitation surge current and
Switching overvoltage, completes the soft of system and stops operation.
Daytime, photovoltaic system started to generate electricity, and photovoltaic case, which becomes, to be needed to connect main power network, now first detects bypass contactor JZ2,
It is " dividing " state, control closure bypass contactor JZ2, due to the side connected with bypass contactor JZ2 to ensure bypass contactor JZ2
Road high-power resistance R effect, excitation surge current and switching overvoltage during suppression input no-load transformer, then safety, which is closed, leads
Contactor JZ1, then disjunction bypass contactor JZ2, complete the soft start operation of system.
Claims (10)
1. a kind of photovoltaic case becomes night from disengaging power network energy-saving cabinet, it is characterised in that be provided with the energy-saving cabinet for connecting light
The main contactor (JZ1) of case change and power network is lied prostrate, the two ends of the main contactor (JZ1) are parallel with bypass, and string is set in the bypass
There are bypass contactor (JZ2) and bypass high-power resistance (R).
2. photovoltaic case according to claim 1 becomes night from disengaging power network energy-saving cabinet, it is characterised in that in the energy-saving cabinet
It is additionally provided with the bus bar side charged display device (DXN1) for connecting power network side bus.
3. photovoltaic case according to claim 1 or 2 becomes night from disengaging power network energy-saving cabinet, it is characterised in that the energy-conservation
Current transformer (LH) is additionally provided with cabinet, the current transformer (LH) is used to be located at the main contactor (JZ1) and photovoltaic
Between case becomes.
4. photovoltaic case according to claim 1 or 2 becomes night from disengaging power network energy-saving cabinet, it is characterised in that the energy-conservation
The arrester (F) for connecting the change of photovoltaic case is additionally provided with cabinet.
5. photovoltaic case according to claim 1 or 2 becomes night from disengaging power network energy-saving cabinet, it is characterised in that the energy-conservation
The line side charged display device (DXN2) for connecting the change of photovoltaic case is additionally provided with cabinet.
6. a kind of photovoltaic generating system, it is characterised in that described including photovoltaic module, header box, DC inversion and energy-saving cabinet
The main contactor (JZ1) for connecting the change of photovoltaic case and power network is provided with energy-saving cabinet, the two ends of the main contactor (JZ1) are simultaneously
Bypass is associated with, string is provided with bypass contactor (JZ2) and bypass high-power resistance (R) in the bypass.
7. photovoltaic generating system according to claim 6, it is characterised in that be additionally provided with the energy-saving cabinet for connecting
The bus bar side charged display device (DXN1) of power network side bus.
8. the photovoltaic generating system according to claim 6 or 7, it is characterised in that be additionally provided with electric current in the energy-saving cabinet
Transformer (LH), the current transformer (LH) is between the main contactor (JZ1) and photovoltaic case become.
9. the photovoltaic generating system according to claim 6 or 7, it is characterised in that connection is additionally provided with the energy-saving cabinet
The arrester (F) that photovoltaic case becomes.
10. the photovoltaic generating system according to claim 6 or 7, it is characterised in that connection is additionally provided with the energy-saving cabinet
The line side charged display device (DXN2) that photovoltaic case becomes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720106156.7U CN206471836U (en) | 2017-02-03 | 2017-02-03 | A kind of photovoltaic case becomes night from disengaging power network energy-saving cabinet and photovoltaic generating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720106156.7U CN206471836U (en) | 2017-02-03 | 2017-02-03 | A kind of photovoltaic case becomes night from disengaging power network energy-saving cabinet and photovoltaic generating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206471836U true CN206471836U (en) | 2017-09-05 |
Family
ID=59703576
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720106156.7U Expired - Fee Related CN206471836U (en) | 2017-02-03 | 2017-02-03 | A kind of photovoltaic case becomes night from disengaging power network energy-saving cabinet and photovoltaic generating system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206471836U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108075490A (en) * | 2017-12-13 | 2018-05-25 | 江苏蓝天光伏科技有限公司 | A kind of energy saver and method for transformer in solar power plant |
| CN111049272A (en) * | 2020-02-11 | 2020-04-21 | 赵晓光 | Energy-saving control system and control method of current collection circuit |
-
2017
- 2017-02-03 CN CN201720106156.7U patent/CN206471836U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108075490A (en) * | 2017-12-13 | 2018-05-25 | 江苏蓝天光伏科技有限公司 | A kind of energy saver and method for transformer in solar power plant |
| CN111049272A (en) * | 2020-02-11 | 2020-04-21 | 赵晓光 | Energy-saving control system and control method of current collection circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107276125A (en) | A kind of chain type multiport grid connection interface device and control method | |
| Jia et al. | Architecture design for new AC-DC hybrid micro-grid | |
| CN108899921B (en) | Energy-storage-oriented multi-port energy router energy management strategy | |
| CN207010253U (en) | A kind of chain type multiport grid connection interface device | |
| CN202172281U (en) | Grid-connected wind generating set | |
| CN206471836U (en) | A kind of photovoltaic case becomes night from disengaging power network energy-saving cabinet and photovoltaic generating system | |
| CN205960668U (en) | Photovoltaic power plant is with energy -conserving protection switch device | |
| CN205544317U (en) | Contain new forms of energy of important load and city direct -current power distribution system of electric automobile access | |
| CN203589824U (en) | Renewable energy power generation, power transmission and transformation and power grid access integration system | |
| Yang et al. | Comparative study on radial topology 10kV AC and±10kV DC power distribution network | |
| CN205070452U (en) | Double -fed type wind turbine generator system high voltage system of passing through | |
| CN110619791A (en) | High-speed rail comprehensive energy utilization system experiment platform and experiment method thereof | |
| CN103117555A (en) | Novel integrated device of solar energy assisted thermal power station | |
| CN203056604U (en) | Novel intelligent microgrid | |
| CN202495699U (en) | Photovoltaic grid-connected power generation voltage-boosting intelligent box-type transformer substation | |
| CN202905395U (en) | Coil structure of on-load-capacity-adjustment transformer | |
| CN201681389U (en) | Loss model for power supply system of electrified railway | |
| CN202616803U (en) | Hybrid current-inversion-type power generation system using wind, light and superconducting magnetic energy storage | |
| CN203312827U (en) | Photovoltaic power station energy-saving circuit | |
| CN103001253B (en) | Be suitable for photovoltaic DC-to-AC converter electric power system and the method for supplying power to thereof of lower voltage ride-through requirement | |
| CN102646995A (en) | Wind, light and superconducting magnetic energy storage hybrid power generation system based on current-source inverters | |
| CN210667412U (en) | High-speed rail comprehensive energy utilization system experiment platform | |
| CN207910525U (en) | A kind of pure electric vehicle AC power output system device peculiar to vessel | |
| CN203574248U (en) | Combined low-voltage power distribution center cabinet | |
| CN104617598A (en) | Wind power plant low voltage riding through method based on dynamic direct current leakage resistor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170905 Termination date: 20210203 |