CN204886206U - A parallel control type power saving device for grid -connected PV power generation system - Google Patents
A parallel control type power saving device for grid -connected PV power generation system Download PDFInfo
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- CN204886206U CN204886206U CN201520575018.4U CN201520575018U CN204886206U CN 204886206 U CN204886206 U CN 204886206U CN 201520575018 U CN201520575018 U CN 201520575018U CN 204886206 U CN204886206 U CN 204886206U
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- time delay
- photovoltaic system
- voltage switch
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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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- 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
Abstract
The utility model discloses a parallel control type power saving device for grid -connected PV power generation system. Economize on electricity part (2) that constitute by switch module (21) and time schedule control subassembly (22) concatenate between its step up transformer binding post (1) and high voltage electric network binding post (3), wherein, switch module (21) are by the 2nd high -voltage switch (214), a high -voltage switch (211), zinc oxide protector (212) and high pressure big power resistor (213) are constituteed, time schedule control subassembly (22) are by light activated switch (Q1), relay coil (KC1), normally open contact (K1), time delay closing relay coil (KC2), time -delayed separation relay coil (KC3), and time -delayed separation normally open contact (K3), a high -voltage switch coil (GK1), time delay closing relay normally open contact (K2), the 2nd high -voltage switch coil (GK2) is formed. It can stop to connect high voltage electric network's the energy consumption of step up transformer when grid -connected PV power generation system does not generate electricity.
Description
Technical field
The utility model relates to a kind of battery saving arrangement, especially a kind of Parallel Control type battery saving arrangement for grid-connected photovoltaic system.
Background technology
Along with the aggravation of environmental pollution, the clean energy---solar energy power generating is widely used.At present, the DC low-voltage access high-voltage fence of people in order to be exported by grid-connected photovoltaic system, inverter and the step-up transformer of using is converted into satisfactory ac high-voltage more.Though this solve grid-connected photovoltaic system generate electricity and can be delivered directly to a difficult problem for public electric wire net, there is weak point also, first, under night comes or sunshine condition does not possess the situation of photovoltaic generation, connect the step-up transformer of grid-connected photovoltaic system and high-voltage fence and auxiliary device thereof due to the loss of self and still consuming a large amount of electric energy; Secondly, this useless loss also accelerates the aging of equipment simultaneously, is unfavorable for that the long-term safety of equipment is run.
Utility model content
The technical problems to be solved in the utility model, for overcoming weak point of the prior art, provides a kind of rational in infrastructure, practical, the Parallel Control type battery saving arrangement for grid-connected photovoltaic system easy to use.
For solving technical problem of the present utility model, the technical scheme adopted is: the Parallel Control type battery saving arrangement for grid-connected photovoltaic system comprises step-up transformer binding post and high-voltage fence binding post, particularly,
Be serially connected with economize on electricity parts between described step-up transformer binding post and high-voltage fence binding post, described economize on electricity parts are made up of switch module and sequencing control assembly;
Described switch module is that the two ends of the second high-voltage switch gear are connected in parallel to protective circuit, and described protective circuit is composed in series by the first high-voltage switch gear and the zinc oxide protector be connected in parallel and high-power resistor;
Described sequencing control assembly is the relay coil and photosensitive switch that are connected in series, relay normally open contact and time delay closing relay coil, relay normally open contact and time delay disconnect relay coil and are all connected across between the first positive source and ground, the time delay be connected in series disconnects relay normally open contact and the first high-voltage switch gear coil, time delay closing relay normally opened contact and the second high-voltage switch gear coil are all connected across between second source positive pole and second source zero line or negative pole, during for there being sunshine, first closed first high-voltage switch gear, time delay is closed second high-voltage switch gear again after 1.5s at least, time without sunshine, first turn off the second high-voltage switch gear, time delay at least turns off the first high-voltage switch gear after 1.5s again, to stop the step-up transformer and the energy consumption of auxiliary device when grid-connected photovoltaic system does not generate electricity thereof that connect high-voltage fence, and eliminate the magnetizing inrush current and overvoltage that produce when grid-connected photovoltaic system is connected with high-voltage fence or disconnects.
Further improvement as the Parallel Control type battery saving arrangement for grid-connected photovoltaic system:
Preferably, the second high-voltage switch gear and the first high-voltage switch gear are AC vacuum contactor.
Preferably, the U of zinc oxide protector
1mA(critical operation voltage during direct current 1mA) is 5000V.
Preferably, the resistance of high-power resistor is 1000 ~ 2000 Ω, power is 2000 ~ 3000W.
Preferably, photosensitive switch is phototriode or photodiode.
Preferably, the timing closing time of time delay closing relay normally opened contact is 2s.
Preferably, time delay disconnect relay normally open contact close after time delay opening time be 2s.
Preferably, the voltage between the first positive source and ground is direct current 24V.
Preferably, the voltage between second source positive pole and second source zero line is alternating current 220V.
Preferably, the voltage between second source positive pole and second source negative pole is direct current 220V.
Relative to the beneficial effect of prior art be:
After adopting such structure, can when sunshine starts by day, by sequencing control assembly control switch assembly first closed first high-voltage switch gear, the second high-voltage switch gear is closed again after time delay at least 1.5s, and at the end of sunshine at night, first turn off the second high-voltage switch gear, after time delay at least 1.5s, turn off the first high-voltage switch gear again; Thus both avoided grid-connected photovoltaic system under not possessing photovoltaic generation situation, the energy consumption that the step-up transformer of connection high-voltage fence and auxiliary device thereof produce because of the loss of self, turn eliminate the magnetizing inrush current and overvoltage that produce when grid-connected photovoltaic system is connected with high-voltage fence or disconnects, also slow down the degree of aging of step-up transformer and auxiliary device thereof widely, reduce the cost of photovoltaic generation, more there is rational in infrastructure, practical, easy to use advantage.
Accompanying drawing explanation
Fig. 1 is a kind of basic structure circuit theory diagrams of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, optimal way of the present utility model is described in further detail.
See Fig. 1, being constructed as follows of Parallel Control type battery saving arrangement for grid-connected photovoltaic system:
Be serially connected with economize on electricity parts 2 between step-up transformer binding post 1 and high-voltage fence binding post 3, these economize on electricity parts 2 are made up of switch module 21 and sequencing control assembly 22.Wherein,
Switch module 21 is that the two ends of the second high-voltage switch gear 214 are connected in parallel to protective circuit, and this protective circuit is composed in series with the zinc oxide protector 212 be connected in parallel and high-power resistor 213 by the first high-voltage switch gear 211; The second high-voltage switch gear 214 wherein and the first high-voltage switch gear 211 are AC vacuum contactor, the U of zinc oxide protector 212
1mAfor 5000V, the resistance of high-power resistor 213 is 1500 (can be 1000 ~ 2000) Ω, power is 2500 (can be 2000 ~ 3000) W.
Sequencing control assembly 22 is all connected across between the first positive source VCC1 and ground for the relay coil KC1 that is connected in series and photosensitive switch Q1, relay normally open contact K1 and time delay closing relay coil KC2, relay normally open contact K1 and time delay disconnect relay coil KC3; Photosensitive switch Q1 is wherein phototriode (or photodiode), and the voltage between the first positive source VCC1 and ground is direct current 24V.The time delay be connected in series disconnects relay normally open contact K3 and the first high-voltage switch gear coil GK1, time delay closing relay normally opened contact K2 and the second high-voltage switch gear coil GK2 and is all connected across between second source positive pole VCC2 and second source zero line (or negative pole) GND; Time delay after the timing closing time of time delay closing relay normally opened contact K2 wherein and time delay disconnection relay normally open contact K3 close is 2s opening time, and the voltage between second source positive pole VCC2 and second source zero line GND is alternating current 220V (or the voltage between second source positive pole VCC2 and second source negative pole GND is direct current 220V).
During use, only step-up transformer binding post 1 of the present utility model and high-voltage fence binding post 3 need be electrically connected with step-up transformer and high-voltage fence respectively.
When daytime, sunshine started, along with the conducting of photosensitive switch Q1, relay coil KC1 flows through operating current, relay normally open contact K1 is closed, thus make time delay closing relay coil KC2 and time delay disconnection relay coil KC3 flow through operating current simultaneously, make time delay disconnect relay normally open contact K3 to close immediately, closed after time delay closing relay normally opened contact K2 time delay 2s, and then make the first high-voltage switch gear coil GK1 first flow through operating current, after time delay 2s, the second high-voltage switch gear coil GK2 just flows through operating current, namely the first high-voltage switch gear 211 is made first to close, after 2s, the second high-voltage switch gear 214 closes again.When the first high-voltage switch gear 211 closes, the zinc oxide protector 212 be connected in parallel be connected in series with the first high-voltage switch gear 211 and high-power resistor 213 eliminate the magnetizing inrush current and overvoltage that produce when grid-connected photovoltaic system and high-voltage fence are connected respectively.
When night is without sunshine, along with the shutoff of photosensitive switch Q1, the relay normally open contact K1 closed also disconnects simultaneously, thus the time delay closing relay normally opened contact K2 closed controlled by it is disconnected prior to the time delay disconnection relay normally open contact K3 closed, and then the second high-voltage switch gear 214 is first disconnected, after 2s, the first high-voltage switch gear 211 disconnects again.In like manner; when the first high-voltage switch gear 211 disconnects, the zinc oxide protector 212 be connected in parallel be connected in series with the first high-voltage switch gear 211 and high-power resistor 213 eliminate the magnetizing inrush current and overvoltage that produce when grid-connected photovoltaic system and high-voltage fence disconnect respectively.
Obviously, those skilled in the art can carry out various change and modification to the Parallel Control type battery saving arrangement for grid-connected photovoltaic system of the present utility model and not depart from spirit and scope of the present utility model.Like this, if belong within the scope of the utility model claim and equivalent technologies thereof to these amendments of the present utility model and modification, then the utility model is also intended to comprise these change and modification.
Claims (10)
1., for a Parallel Control type battery saving arrangement for grid-connected photovoltaic system, comprise step-up transformer binding post (1) and high-voltage fence binding post (3), it is characterized in that:
Be serially connected with economize on electricity parts (2) between described step-up transformer binding post (1) and high-voltage fence binding post (3), described economize on electricity parts (2) are made up of switch module (21) and sequencing control assembly (22);
Described switch module (21) is that the two ends of the second high-voltage switch gear (214) are connected in parallel to protective circuit, and described protective circuit is composed in series by the first high-voltage switch gear (211) and the zinc oxide protector (212) be connected in parallel and high-power resistor (213);
Described sequencing control assembly (22) is the relay coil (KC1) that is connected in series and photosensitive switch (Q1), relay normally open contact (K1) and time delay closing relay coil (KC2), relay normally open contact (K1) and time delay disconnect relay coil (KC3) and are all connected across between the first positive source (VCC1) and ground, the time delay be connected in series disconnects relay normally open contact (K3) and the first high-voltage switch gear coil (GK1), time delay closing relay normally opened contact (K2) and the second high-voltage switch gear coil (GK2) are all connected across between second source positive pole (VCC2) and second source zero line or negative pole (GND), during for there being sunshine, first closed first high-voltage switch gear (211), time delay is closed second high-voltage switch gear (214) again after 1.5s at least, time without sunshine, first turn off the second high-voltage switch gear (214), time delay at least turns off the first high-voltage switch gear (211) after 1.5s again, to stop the step-up transformer and the energy consumption of auxiliary device when grid-connected photovoltaic system does not generate electricity thereof that connect high-voltage fence, and eliminate the magnetizing inrush current and overvoltage that produce when grid-connected photovoltaic system is connected with high-voltage fence or disconnects.
2. the Parallel Control type battery saving arrangement for grid-connected photovoltaic system according to claim 1, is characterized in that the second high-voltage switch gear (214) and the first high-voltage switch gear (211) are AC vacuum contactor.
3. the Parallel Control type battery saving arrangement for grid-connected photovoltaic system according to claim 1, is characterized in that the U of zinc oxide protector (212)
1mAfor 5000V.
4. the Parallel Control type battery saving arrangement for grid-connected photovoltaic system according to claim 1, is characterized in that the resistance of high-power resistor (213) is 1000 ~ 2000 Ω, power is 2000 ~ 3000W.
5. the Parallel Control type battery saving arrangement for grid-connected photovoltaic system according to claim 1, is characterized in that photosensitive switch (Q1) is for phototriode or photodiode.
6. the Parallel Control type battery saving arrangement for grid-connected photovoltaic system according to claim 1, is characterized in that the timing closing time of time delay closing relay normally opened contact (K2) is 2s.
7. the Parallel Control type battery saving arrangement for grid-connected photovoltaic system according to claim 1, it is characterized in that time delay disconnect relay normally open contact (K3) closed after time delay opening time be 2s.
8. the Parallel Control type battery saving arrangement for grid-connected photovoltaic system according to claim 1, is characterized in that the voltage between the first positive source (VCC1) and ground is direct current 24V.
9. the Parallel Control type battery saving arrangement for grid-connected photovoltaic system according to claim 1, is characterized in that the voltage between second source positive pole (VCC2) and second source zero line (GND) is alternating current 220V.
10. the Parallel Control type battery saving arrangement for grid-connected photovoltaic system according to claim 1, is characterized in that the voltage between second source positive pole (VCC2) and second source negative pole (GND) is direct current 220V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520575018.4U CN204886206U (en) | 2015-07-29 | 2015-07-29 | A parallel control type power saving device for grid -connected PV power generation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520575018.4U CN204886206U (en) | 2015-07-29 | 2015-07-29 | A parallel control type power saving device for grid -connected PV power generation system |
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| CN204886206U true CN204886206U (en) | 2015-12-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520575018.4U Active CN204886206U (en) | 2015-07-29 | 2015-07-29 | A parallel control type power saving device for grid -connected PV power generation system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111869086A (en) * | 2018-12-29 | 2020-10-30 | 华为技术有限公司 | Inverter |
-
2015
- 2015-07-29 CN CN201520575018.4U patent/CN204886206U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111869086A (en) * | 2018-12-29 | 2020-10-30 | 华为技术有限公司 | Inverter |
| CN111869086B (en) * | 2018-12-29 | 2022-07-12 | 华为数字能源技术有限公司 | Inverter |
| US11637431B2 (en) | 2018-12-29 | 2023-04-25 | Huawei Digital Power Technologies Co., Ltd. | Inverter |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |