CN111384711A - Phase-dislocation protection device based on charging pile system and use method thereof - Google Patents
Phase-dislocation protection device based on charging pile system and use method thereof Download PDFInfo
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- CN111384711A CN111384711A CN201811621823.0A CN201811621823A CN111384711A CN 111384711 A CN111384711 A CN 111384711A CN 201811621823 A CN201811621823 A CN 201811621823A CN 111384711 A CN111384711 A CN 111384711A
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- phase
- phase sequence
- charging pile
- relay
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
- H02H11/004—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result in case of incorrect phase sequence; with switching for obtaining correct phase sequence
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention relates to the technical field of charging piles, in particular to a phase-error protection device based on a charging pile system, which comprises a phase sequence detection relay and an intermediate relay, wherein the detection end of the phase sequence detection relay is respectively connected with the correct phase sequence of a three-phase power supply system, a first feedback contact and a second feedback contact of the phase sequence detection relay are normally closed series contacts, a third feedback contact is a normally open contact connected with the first feedback contact in series, one end of a coil of the intermediate relay is connected with the first feedback contact, the other end of the coil of the intermediate relay is connected with an external commercial power live wire, the third feedback contact is connected with an external commercial power zero line, and the normally open contact of the intermediate relay is connected with an L line supplied by commercial power in series.
Description
Technical Field
The invention relates to the technical field of charging piles, in particular to a phase-dislocation protection device based on a charging pile system.
Background
At present, the related protection work is not carried out on the phase sequence error of the incoming line end of a direct current charging pile (charging system) in China (the phase sequence abnormality mainly refers to the fact that power distribution and related installation personnel of the charging pile do not install the direct current charging pile according to related regulations of the power industry), but the abnormal problems (including phenomena of over-voltage burning of components, misoperation and the like) caused by the phase sequence error exist in the charging pile system due to the related limitation of the working voltage of various components.
Disclosure of Invention
The invention aims to provide a charging pile system-based phase-error protection device to solve the problem that in the prior art, due to the relevant limitation of the working voltage of various components, abnormality is caused by phase sequence errors.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a wrong looks protection device based on fill electric pile system, including phase sequence detection relay, auxiliary relay, phase sequence detection relay's sense terminal is connected respectively on three phase current supply system's the correct phase sequence, phase sequence detection relay's feedback contact one and feedback contact two are normally closed series contact, feedback contact three is the normally open contact who establishes ties with feedback contact one, feedback contact one is connected to auxiliary relay's coil one end, external commercial power live wire is connected to auxiliary relay's the coil other end, feedback contact three connects outside commercial power zero line, power supply is connected to auxiliary relay's normally open contact one end, the other end is connected on three phase current supply system's the third phase sequence.
Preferably, the normally open contact of the intermediate relay is connected in series with the L end of the control power supply of the charging pile and used for controlling the cut-off of the power supply of the control loop of the charging pile.
Preferably, the power supply is an AC220V power supply inside the charging pile.
In order to achieve the above purpose, the invention also provides the following technical scheme: the use method of the phase-dislocation protection device based on the charging pile system comprises the following steps:
(1) when the three-phase sequence is normal, the phase sequence detection relay detects that the phase sequence is normal;
(2) therefore, the first feedback contact and the third feedback contact of the phase sequence detection relay are connected, the coil of the intermediate relay is electrified and then attracted, and the AC220V in the charging pile is supplied;
(3) if any phase sequence at the front end is abnormal;
(4) the phase sequence detection relay does not act, and the first feedback contact and the third feedback contact do not change at the moment, so that the coil of the intermediate relay does not have power and the intermediate relay does not act, and a charging pile control loop does not have power supply;
(5) fill electric pile wholly unchangeable and unable start-up, and then reduce the abnormal problem that phase sequence error caused.
Preferably, the abnormal occurrence of the phase sequence at the front end includes various existing wrong phase access of a phase-wrong phase, a phase-wrong phase and a phase-lack phase.
Compared with the prior art, the invention has the beneficial effects that: by means of the mode control, the charging pile can be effectively controlled to be started under the condition that the phase sequence is abnormal, and related risks caused by phase sequence errors are reduced.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention.
In the figure: 1. a phase sequence detection relay; 2. an intermediate relay; 3. and a power switch.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present invention provides a technical solution: the utility model provides a wrong looks protection device based on fill electric pile system, including phase sequence detection relay 1, auxiliary relay 2, phase sequence detection relay 1's sense terminal is connected respectively on three phase current supply system's the correct phase sequence, phase sequence detection relay 1's feedback contact one and feedback contact two are normally closed series contact, feedback contact three is the normally open contact of establishing ties with feedback contact, feedback contact one is connected to auxiliary relay 2's coil one end, external commercial power live wire is connected to auxiliary relay 2's the coil other end, feedback contact three connects outside commercial power zero line, auxiliary relay 2's normally open contact concatenates on commercial power supply's L line, auxiliary relay 2's upper end is the commercial power of AC220V and gets the electricity, the lower extreme is follow-up AC220V power supplies.
And the normally open contact of the intermediate relay is connected in series with the control power supply L end of the charging pile and is used for controlling the cut-off of the power supply of the charging pile control loop.
The normally open contact end of the intermediate relay 2 shown in fig. 1 is connected with the control power supply L of the charging pile, and the other end of the normally open contact end is connected with the power switch 3 (breaker) and is connected with the third phase sequence of the three-phase power supply system in series through the power switch 3 (breaker).
The power supply is an AC220V power supply inside the charging pile.
The use method of the phase-dislocation protection device based on the charging pile system comprises the following steps:
(1) when the three-phase sequence is normal, the phase sequence detection relay 1 detects that the phase sequence is normal;
(2) therefore, the first feedback contact and the third feedback contact of the phase sequence detection relay 1 are connected, the coil of the intermediate relay 2 is electrified and then attracted, and the AC220V in the charging pile is supplied;
(3) if any phase sequence at the front end is abnormal;
(4) the phase sequence detection relay 1 does not act, and the first feedback contact and the third feedback contact do not change at the moment, so that a coil of the intermediate relay 2 does not have electricity, and the intermediate relay 2 does not act, so that a charging pile control loop does not have power supply;
(5) fill electric pile wholly unchangeable and unable start-up, and then reduce the abnormal problem that phase sequence error caused.
The abnormal phase sequence of the front end comprises the wrong phase access of various existing phases such as phase-phase wrong phase, phase-phase N wrong phase, phase-phase PE wrong phase and phase lack.
Through the technical scheme, when the three-phase sequence is normal, the KA1 (the phase sequence detection relay 1) detects that the phase sequence is normal, so that the feedback contacts 11 and 14 are connected, the coil of the KA2 (the intermediate relay 2) is electrified, the KA2 is attracted, and the AC220V in the charging pile is supplied; if any phase sequence at the front end is abnormal (including various abnormalities such as three-phase sequence reverse connection, phase loss, phase line and N line reverse connection and the like), the phase sequence detection relay 1 does not act, at the moment, 11 and 14 do not change, the coil of the KA2 does not have power, and the KA2 does not act, so that a charging pile control loop does not have power supply, the charging pile is not changed integrally and cannot be started, and the abnormal problem caused by phase sequence errors is reduced.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides a wrong looks protection device based on fill electric pile system which characterized in that: including phase sequence detection relay, auxiliary relay, phase sequence detection relay's sense terminal is connected respectively on three phase power supply system's the correct phase sequence, and phase sequence detection relay's feedback contact one and feedback contact two are normally closed series contact, and feedback contact three is the normally open contact who establishes ties with feedback contact one, and feedback contact one is connected to auxiliary relay's coil one end, and external commercial power live wire is connected to auxiliary relay's the coil other end, and outside commercial power zero line is connected to feedback contact three, and auxiliary relay's normally open contact concatenates on commercial power supply's L line.
2. The charging pile system-based phase-dislocation protection device according to claim 1, wherein: and the normally open contact of the intermediate relay is connected in series with the control power supply L end of the charging pile and is used for controlling the cut-off of the power supply of the charging pile control loop.
3. The charging pile system-based phase-dislocation protection device according to claim 1, wherein: the power supply is an AC220V power supply inside the charging pile.
4. The use method of the phase-dislocation protection device based on the charging pile system is characterized by comprising the following steps: the method comprises the following steps:
(1) when the three-phase sequence is normal, the phase sequence detection relay detects that the phase sequence is normal;
(2) therefore, the first feedback contact and the third feedback contact of the phase sequence detection relay are connected, the coil of the intermediate relay is electrified and then attracted, and the AC220V in the charging pile is supplied;
(3) if any phase sequence at the front end is abnormal;
(4) the phase sequence detection relay does not act, and the first feedback contact and the third feedback contact do not change at the moment, so that the coil of the intermediate relay does not have power and the intermediate relay does not act, and a charging pile control loop does not have power supply;
(5) fill electric pile wholly unchangeable and unable start-up, and then reduce the abnormal problem that phase sequence error caused.
5. The charging pile system-based phase-error protection device of claim 4, wherein: the abnormal phase sequence of the front end comprises the wrong phase access of various existing phases such as phase-phase wrong phase, phase-phase N wrong phase, phase-phase PE wrong phase and phase lack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811621823.0A CN111384711A (en) | 2018-12-28 | 2018-12-28 | Phase-dislocation protection device based on charging pile system and use method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811621823.0A CN111384711A (en) | 2018-12-28 | 2018-12-28 | Phase-dislocation protection device based on charging pile system and use method thereof |
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| CN111384711A true CN111384711A (en) | 2020-07-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811621823.0A Pending CN111384711A (en) | 2018-12-28 | 2018-12-28 | Phase-dislocation protection device based on charging pile system and use method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114336907A (en) * | 2021-12-09 | 2022-04-12 | 华人运通(江苏)技术有限公司 | Charging control method, device, equipment and medium for charging pile |
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| CN201757073U (en) * | 2009-07-31 | 2011-03-09 | 广州中船远航船坞有限公司 | Safe & intelligent type explosionproof air blower electric control box |
| CN202068170U (en) * | 2011-06-09 | 2011-12-07 | 广州广一泵业有限公司 | Automatic power supply phase sequence adjusting device for three-phase water pump or blower fan |
| CN202424164U (en) * | 2012-02-23 | 2012-09-05 | 中联重科股份有限公司 | Three-phase alternating current power supply phase controller, three-phase alternating current motor and garbage compressor |
| CN205141656U (en) * | 2015-10-29 | 2016-04-06 | 上海海立特种制冷设备有限公司 | Automatic congruence that entangles of bridge crane air conditioner lacks looks protection device |
| CN206727642U (en) * | 2017-03-16 | 2017-12-08 | 南京讯汇科技发展有限公司 | A kind of phase shortage automatic power-off protection device |
| CN207967919U (en) * | 2018-02-02 | 2018-10-12 | 无锡雪鸥移动空调有限公司 | A kind of mobile air conditioner unit with misphase default-phase protection function |
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2018
- 2018-12-28 CN CN201811621823.0A patent/CN111384711A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201757073U (en) * | 2009-07-31 | 2011-03-09 | 广州中船远航船坞有限公司 | Safe & intelligent type explosionproof air blower electric control box |
| CN202068170U (en) * | 2011-06-09 | 2011-12-07 | 广州广一泵业有限公司 | Automatic power supply phase sequence adjusting device for three-phase water pump or blower fan |
| CN202424164U (en) * | 2012-02-23 | 2012-09-05 | 中联重科股份有限公司 | Three-phase alternating current power supply phase controller, three-phase alternating current motor and garbage compressor |
| CN205141656U (en) * | 2015-10-29 | 2016-04-06 | 上海海立特种制冷设备有限公司 | Automatic congruence that entangles of bridge crane air conditioner lacks looks protection device |
| CN206727642U (en) * | 2017-03-16 | 2017-12-08 | 南京讯汇科技发展有限公司 | A kind of phase shortage automatic power-off protection device |
| CN207967919U (en) * | 2018-02-02 | 2018-10-12 | 无锡雪鸥移动空调有限公司 | A kind of mobile air conditioner unit with misphase default-phase protection function |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114336907A (en) * | 2021-12-09 | 2022-04-12 | 华人运通(江苏)技术有限公司 | Charging control method, device, equipment and medium for charging pile |
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