CN218829654U - Soft start circuit of energy storage inverter power grid - Google Patents
Soft start circuit of energy storage inverter power grid Download PDFInfo
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- CN218829654U CN218829654U CN202223396417.3U CN202223396417U CN218829654U CN 218829654 U CN218829654 U CN 218829654U CN 202223396417 U CN202223396417 U CN 202223396417U CN 218829654 U CN218829654 U CN 218829654U
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- dsp controller
- energy storage
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The utility model discloses an energy storage inverter electric wire netting soft start circuit, include: DSP controller, relay RYL1, relay RYL2, relay RYL3, inverter circuit INV, rectifier bridge DB, main and auxiliary electricity and resistance R1, main and auxiliary electricity is connected the DSP controller and is supplied power for the DSP controller, DSP controller control relay RYL1 and relay RYL 2's operating condition. The utility model discloses an automatic soft opening can be accomplished from closing to AC relay, need not to increase new auxiliary power supply and give the DSP controller power supply to need not adopt isolation transformer to keep apart DC bus and AC electric network, simultaneously, the circuit is succinct, can effectively save space and cost.
Description
Technical Field
The utility model relates to an energy storage dc-to-ac converter technical field especially relates to an energy storage dc-to-ac converter electric wire netting soft start circuit.
Background
At present, two types of power grid soft start circuit modes are applied in an energy storage inverter, please refer to fig. 1, wherein the first type mainly comprises a soft start circuit consisting of a relay, a step-up transformer, a current-limiting resistor and a rectifier bridge, a DSP is needed to give a signal relay RYL2 to attract the soft start circuit before the method is started, and a power grid passes through the step-up transformer T1 and then is output to a bus through the rectifier bridge; when the voltage value of the bus capacitor reaches a certain threshold value, when the DSP detects that the average value of the direct current bus voltage is larger than the threshold value, the DSP controls the disconnection relay RYL2 and sends a driving signal to enable the full-bridge inverter circuit to be conducted to work, and then the pull-in relay RYL1 is connected with the mains supply in a grid mode. The disadvantage of this method is that before the soft start circuit is started, auxiliary power is provided to the DSP controller to control the relay RYL2 to suck, so that the whole soft start circuit can work normally. In the case of only the mains supply, the starting mode is complicated and can be realized by adding a plurality of circuits.
Referring to fig. 2, the second solution only consists of a relay, a rectifier bridge DB and a current-limiting resistor, and has the greatest advantages that no auxiliary power needs to be provided for the DSP controller before starting and the circuit is simple because the relay is in a normally closed state. When the power grid is electrified, the electricity of the power grid can directly pass through the relay and then is output to the bus through the rectifier bridge; when the voltage value of the bus capacitor reaches a certain threshold value, when the DSP detects that the average value of the direct current bus voltage is larger than the threshold value condition, the DSP controls the disconnection relay RYL2 and simultaneously sends out a driving signal to enable the full-bridge inverter circuit to be conducted to work, and then the pull-in relay RYL1 is connected with the commercial power in a grid mode. The disadvantage of this kind of scheme lies in under the off-grid state, when the rectifier bridge damages the short circuit, the bus voltage can directly switch on to the electric wire netting port, causes harm to user's life safety, does not conform to the safety regulation requirement.
Accordingly, the prior art is deficient and needs improvement.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming prior art's not enough, providing an energy storage dc-to-ac converter electric wire netting soft start circuit, solve the energy storage dc-to-ac converter when only the commercial power, the soft start need not the problem of giving the power supply of DSP controller alone to and the ann rule problem that causes after the rectifier bridge became invalid.
The technical scheme of the utility model as follows: the utility model provides a soft start-up circuit of energy storage inverter electric wire netting, includes: DSP controller, relay RYL1, relay RYL2, relay RYL3, inverter circuit INV, rectifier bridge DB, main power and auxiliary power and resistance R1, main power and auxiliary power is connected DSP controller power supply, relay RYL 1's one end is connected with inverter circuit INV, relay RYL 1's the other end inserts the electric wire netting, relay RYL 2's one end is connected with resistance R1, relay RYL 2's the other end is connected with relay RYL 3's one end, relay RYL 3's the other end is connected with the live wire of electric wire netting, resistance R1's the other end is connected with one interchange pin of rectifier bridge DB, another interchange pin of rectifier bridge DB is connected with the zero line of electric wire netting, rectifier bridge DB's direct current positive pole, direct current negative pole insert in parallel with main power converter + and BUS respectively, DSP controller control relay RYL1 and relay RYL 2's operating condition.
Further, the relay RYL1 comprises two sets of relay elements, and the relay elements are respectively connected with a zero line and a live line of a power grid.
Further, a fuse FU is connected between the relay RYL3 and the live wire.
Further, the relay RYL2 adopts a normally closed relay.
Further, the resistor R1 is a current limiting resistor.
Adopt above-mentioned scheme, the utility model discloses an automatic soft opening can be accomplished from closing to AC relay, need not to increase new auxiliary power supply and give the DSP controller power supply to need not adopt isolation transformer to keep apart DC bus and AC electric network, simultaneously, the circuit is succinct, can effectively save space and cost.
Drawings
Fig. 1 is a schematic circuit connection diagram of a first prior art scheme.
Fig. 2 is a circuit connection diagram of a second scheme of the prior art.
Fig. 3 is a schematic diagram of the circuit connection of the present invention.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
Referring to fig. 3, the present invention provides a soft start circuit for a power grid of an energy storage inverter, including: DSP controller 1, relay RYL2, relay RYL3, inverter circuit INV, rectifier bridge DB, main and auxiliary electricity 2 and resistance R1, the main and auxiliary electricity is connected DSP controller and is supplied power for DSP controller 1, relay RYL 1's one end is connected with inverter circuit INV, relay RYL 1's the other end inserts the electric wire netting, relay RYL 2's one end is connected with resistance R1, relay RYL 2's the other end is connected with relay RYL 3's one end, relay RYL 3's the other end is connected with the live wire of electric wire netting, resistance R1's the other end is connected with an interchange pin of rectifier bridge DB, another interchange pin of rectifier bridge DB is connected with the zero line of electric wire netting, rectifier bridge DB's direct current positive pole, direct current negative pole respectively with main and auxiliary electricity converter parallelly connected in BUS + and BUS-, DSP controller control relay RYL1 and relay RYL 2's operating condition.
The relay RYL1 comprises two groups of relay elements which are respectively connected with a zero line and a live line of a power grid.
Be connected with fuse FU between relay RYL3 and the live wire, when the condition that short circuit or circuit overload appear, fuse FU can fuse to other components and parts in the protection circuit.
The relay RYL2 adopts a normally closed relay.
The resistor R1 is a current-limiting resistor.
When the power grid is electrified, the coil of the relay RYL3 is electrified, so that the contact of the relay RYL3 is attracted, and the soft start circuit is conducted. Then through normally closed relay RYL2 and current-limiting resistor R1, reach rectifier bridge DB after change alternating current into direct current output to the generating line and for main auxiliary electricity 2 power supply, can supply power to DSP controller 1 after main auxiliary electricity 2 has the electricity. At this time, the bus voltage is maintained at a constant value, and the inverter is supplied with power from the grid while maintaining the current state. When the voltage value of the bus capacitor reaches a certain threshold value, when the DSP controller 1 detects that the average value of the direct current bus voltage is greater than the threshold value, the DSP controller 1 disconnects the relay RYL2, and simultaneously sends a driving signal to enable the full-bridge inverter circuit to be conducted to work, and then the pull-in relay RYL1 is connected with the mains supply in a grid mode. When no commercial power exists, namely the AC self-closing relay RYL3 is in an off-grid state, the AC self-closing relay can be automatically disconnected, the voltage on the bus capacitor cannot reach a power grid port, and the damage to people cannot be caused.
To sum up, the utility model discloses an automatic soft opening can be accomplished from closing to AC relay, need not to increase new auxiliary power supply and give the DSP controller power supply to need not adopt isolation transformer to keep apart DC bus and AC electric network, simultaneously, the circuit is succinct, can effectively save space and cost.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (5)
1. A soft start circuit of an energy storage inverter power grid is characterized by comprising: DSP controller, relay RYL1, relay RYL2, relay RYL3, inverter circuit INV, rectifier bridge DB, main and auxiliary electricity and resistance R1, the main and auxiliary electricity is connected the DSP controller and is supplied power, relay RYL 1's one end is connected with inverter circuit INV, relay RYL 1's the other end inserts the electric wire netting, relay RYL 2's one end is connected with resistance R1, relay RYL 2's the other end is connected with relay RYL 3's one end, relay RYL 3's the other end is connected with the live wire of electric wire netting, resistance R1's the other end is connected with one of rectifier bridge DB's an interchange pin, another interchange pin of rectifier bridge DB is connected with the zero line of electric wire netting, rectifier bridge DB's direct current positive pole, direct current negative pole are assisted respectively and are connected in parallel with main electric transducer BUS + and BUS-, DSP controller control relay RYL1 and relay RYL 2's operating condition.
2. The soft start circuit of the energy storage inverter grid as claimed in claim 1, wherein the relay RYL1 comprises two sets of relay elements, and the relay elements are respectively connected with a zero line and a live line of the grid.
3. The soft start circuit of the energy storage inverter power grid as claimed in claim 1, wherein a fuse FU is connected between the relay RYL3 and the live wire.
4. The soft start circuit of the energy storage inverter power grid as claimed in claim 1, wherein the relay RYL2 is a normally closed relay.
5. The soft start circuit of the energy storage inverter power grid according to claim 1, wherein the resistor R1 is a current limiting resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223396417.3U CN218829654U (en) | 2022-12-16 | 2022-12-16 | Soft start circuit of energy storage inverter power grid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223396417.3U CN218829654U (en) | 2022-12-16 | 2022-12-16 | Soft start circuit of energy storage inverter power grid |
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| Publication Number | Publication Date |
|---|---|
| CN218829654U true CN218829654U (en) | 2023-04-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223396417.3U Active CN218829654U (en) | 2022-12-16 | 2022-12-16 | Soft start circuit of energy storage inverter power grid |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116505524A (en) * | 2023-06-29 | 2023-07-28 | 深圳市高斯宝电气技术有限公司 | Power grid electricity taking topology of household storage inverter |
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2022
- 2022-12-16 CN CN202223396417.3U patent/CN218829654U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116505524A (en) * | 2023-06-29 | 2023-07-28 | 深圳市高斯宝电气技术有限公司 | Power grid electricity taking topology of household storage inverter |
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