CN204304467U - A kind of and from net inversion commutation circuit - Google Patents
A kind of and from net inversion commutation circuit Download PDFInfo
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- CN204304467U CN204304467U CN201520029229.8U CN201520029229U CN204304467U CN 204304467 U CN204304467 U CN 204304467U CN 201520029229 U CN201520029229 U CN 201520029229U CN 204304467 U CN204304467 U CN 204304467U
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- pole double
- moved end
- throw relay
- throw
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- 238000004353 relayed correlation spectroscopy Methods 0.000 claims abstract description 10
- 230000001360 synchronised effect Effects 0.000 claims abstract description 4
- 230000005611 electricity Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
Abstract
The utility model discloses one and from net inversion commutation circuit, comprise dpdt relay (RL1), dpdt relay (RL1) is provided with two groups of synchronous contacts, wherein two terminals of one group of contact are connected with the first single-pole double-throw relay (RL2) one of them moved end with electrical network live wire end (GRID_L) respectively, and two terminals of described dpdt relay (RL1) another group contact upper are connected with the second single-pole double-throw relay (RL3) first moved end with electrical network zero line side (GRID_N) respectively; Described first single-pole double-throw relay (RL2) is connected with two EPS outputs (L_PLOCAL with N_PLOCAL) respectively with the not moved end of the second single-pole double-throw relay (RL3); Described first single-pole double-throw relay (RL2) is connected with two H bridge inversions rear class (L_RELAY with N_RELAY) of inverter respectively with the second moved end of the second single-pole double-throw relay (RL3).
Description
Technical field
The utility model relates to one and from net inversion commutation circuit, particularly a kind of in photovoltaic inverter circuit to the circuit switched from net and grid-connect mode.
Background technology
In field of photovoltaic power generation, for the grid-connected and off-grid mode that supplies power with double circuit of employing, for solving photovoltaic electric power unstability and intermittence, accomplish, having electricity area application photovoltaic electric power and meeting load uninterrupted need for electricity continuously with mains hybrid for user provides, just to require to realize mutually switching from net photovoltaic power system and mains-supplied system.Under normal circumstances, photovoltaic DC-to-AC converter will possess wants grid-connected and from net two kinds of mode of operations, just needs to realize and from the switching of net state, therefore usually also needs detecting real-time detection of grid situation.
Utility model content
The purpose of this utility model is, provides a kind of and from net inversion commutation circuit.It can carry out easily and from the switching of net state, effectively make inverter switch timely when user load demand changes.
The technical solution of the utility model: a kind of and from net inversion commutation circuit, be characterized in: comprise dpdt relay, dpdt relay is provided with two groups of synchronous contacts, wherein two terminals of one group of contact are connected with one of them moved end of the first single-pole double-throw relay with electrical network live wire end respectively, and on described dpdt relay, two terminals of another group contact are connected with the second single-pole double-throw relay first moved end with electrical network zero line side respectively; Described first single-pole double-throw relay is connected with two EPS outputs respectively with the not moved end of the second single-pole double-throw relay; Described first single-pole double-throw relay is connected with two H bridge inversion rear classes of inverter respectively with the second moved end of the second single-pole double-throw relay.
Above-mentioned and from net inversion commutation circuit, when grid-connected inverters works, two groups of contacts of dpdt relay are all closed, and the switch of the first single-pole double-throw relay and the second single-pole double-throw relay is allocated to the first moved end; When after utility power failure, inverter is switched to rapidly EPS pattern, and two groups of contacts of dpdt relay are opened simultaneously, and the switch of the first single-pole double-throw relay and the second single-pole double-throw relay is allocated to the second moved end simultaneously.
Above-mentioned and from net inversion commutation circuit, be connected with three electric capacity in parallel between two H bridge inversion rear classes of described inverter, for the adjustment of the electric capacity C parameter in the off-grid LC parameter of EPS.
Compared with prior art, the utility model is by using the combination of multiple simple relay to realize and from the quick switching of net state, and the utility model sharing same H-bridge inverter circuit under net pattern and grid-connect mode, reduces system construction cost.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Detailed description of the invention
Below in conjunction with drawings and Examples, the utility model is further described, but not as the foundation limited the utility model.
Embodiment.A kind of and from net inversion commutation circuit, as shown in Figure 1: comprise dpdt relay RL1, dpdt relay RL1 is provided with two groups of synchronous contacts, wherein two terminals of one group of contact are connected with first one of them moved end of single-pole double-throw relay RL2 with electrical network live wire end GRID_L respectively, and on described dpdt relay RL1, two terminals of another group contact are connected with the second single-pole double-throw relay RL3 first moved end with electrical network zero line side GRID_N respectively; Described first single-pole double-throw relay RL2 is connected with two EPS output L_PLOCAL with N_PLOCAL respectively with the not moved end of the second single-pole double-throw relay RL3; Described first single-pole double-throw relay RL2 is connected with N_RELAY with two H bridge inversion rear class L_RELAY of inverter respectively with second moved end of the second single-pole double-throw relay RL3.Three electric capacity C1, C2 and C3 in parallel are connected with between two H bridge inversion rear class L_RELAY and N_RELAY of described inverter.
When grid-connected inverters works, two groups of contacts of dpdt relay RL1 are all closed, and the switch of the first single-pole double-throw relay RL2 and the second single-pole double-throw relay RL3 is allocated to the first moved end; When after utility power failure, inverter is switched to rapidly EPS pattern, and two groups of contacts of dpdt relay RL1 are opened simultaneously, and the switch of the first single-pole double-throw relay RL2 and the second single-pole double-throw relay RL3 is allocated to the second moved end simultaneously.
Claims (2)
1. one kind and from net inversion commutation circuit, it is characterized in that: comprise dpdt relay (RL1), dpdt relay (RL1) is provided with two groups of synchronous contacts, wherein two terminals of one group of contact are connected with the first single-pole double-throw relay (RL2) one of them moved end with electrical network live wire end (GRID_L) respectively, and two terminals of described dpdt relay (RL1) another group contact upper are connected with the second single-pole double-throw relay (RL3) first moved end with electrical network zero line side (GRID_N) respectively; Described first single-pole double-throw relay (RL2) is connected with two EPS outputs (L_PLOCAL with N_PLOCAL) respectively with the not moved end of the second single-pole double-throw relay (RL3); Described first single-pole double-throw relay (RL2) is connected with two H bridge inversions rear class (L_RELAY with N_RELAY) of inverter respectively with the second moved end of the second single-pole double-throw relay (RL3).
2. according to claim 1 and from net inversion commutation circuit, it is characterized in that: between two H bridge inversions rear class (L_RELAY and N_RELAY) of described inverter, to be connected with three electric capacity (C1, C2 and C3) in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520029229.8U CN204304467U (en) | 2015-01-16 | 2015-01-16 | A kind of and from net inversion commutation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520029229.8U CN204304467U (en) | 2015-01-16 | 2015-01-16 | A kind of and from net inversion commutation circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204304467U true CN204304467U (en) | 2015-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520029229.8U Active CN204304467U (en) | 2015-01-16 | 2015-01-16 | A kind of and from net inversion commutation circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN204304467U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104518522A (en) * | 2015-01-16 | 2015-04-15 | 杭州桑尼能源科技有限公司 | Grid connection and off-grid inverting switching circuit |
-
2015
- 2015-01-16 CN CN201520029229.8U patent/CN204304467U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104518522A (en) * | 2015-01-16 | 2015-04-15 | 杭州桑尼能源科技有限公司 | Grid connection and off-grid inverting switching circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: HANGZHOU SUNNYGAIWEIFUZHURENNENGYUANJUJUZHANG-126. Free format text: FORMER NAME: HANGZHOU SUNNY ENERGY SCIENCE AND TECHNOLOGY CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: Tonglu County, Hangzhou Economic Development Zone, Zhejiang province 311500 City Chu Road No. 288 Patentee after: Hangzhou Sani's energy science and technology limited company Address before: Tonglu County, Hangzhou Economic Development Zone, Zhejiang province 311500 City Chu Road No. 288 Patentee before: HANGZHOU SUNNY ENERGY SCIENCE AND TECHNOLOGY CO., LTD. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20181229 Address after: 311500 No. 288 Shizhu Road, Tonglu Economic Development Zone, Hangzhou City, Zhejiang Province Patentee after: Zhejiang elong network energy technology Co. Ltd Address before: 311500 No. 288 Shizhu Road, Tonglu County Economic Development Zone, Hangzhou City, Zhejiang Province Patentee before: Hangzhou Sani's energy science and technology limited company |
|
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 311500 No. 288 Shizhu Road, Tonglu County Economic Development Zone, Hangzhou City, Zhejiang Province Patentee after: Zhejiang arrow network energy technology Co.,Ltd. Address before: 311500 No. 288 Shizhu Road, Tonglu Economic Development Zone, Hangzhou City, Zhejiang Province Patentee before: ZHEJIANG SOLAX NETWORK ENERGY TECHNOLOGY Co.,Ltd. |