CN111409496A - Method and device for inhibiting distribution transformer overload in electric vehicle charging station - Google Patents
Method and device for inhibiting distribution transformer overload in electric vehicle charging station Download PDFInfo
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- CN111409496A CN111409496A CN201910934631.3A CN201910934631A CN111409496A CN 111409496 A CN111409496 A CN 111409496A CN 201910934631 A CN201910934631 A CN 201910934631A CN 111409496 A CN111409496 A CN 111409496A
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- charging station
- transformer
- charging
- power
- distribution transformer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/60—Monitoring or controlling charging stations
- B60L53/62—Monitoring or controlling charging stations in response to charging parameters, e.g. current, voltage or electrical charge
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/12—Electric charging stations
Abstract
The invention discloses a method and a device for restraining distribution transformer overload under an electric vehicle charging station, wherein the method is applied to a transformer-charging station system, the charging station is composed of a plurality of charging piles, the transformer provides output power for the charging station, the method comprises a distribution transformer step, and the distribution transformer step comprises the following steps: when St is larger than or equal to S, judging whether Y is larger than or equal to Q; when Y is smaller than Q, adjusting the output power of each charging pile to a target power P; when Y is larger than or equal to Q, each charging pile operates in no-load mode; when St is less than S, operating each charging pile at full load; the device comprises: the device comprises a parameter acquisition module, a calculation module and an execution module. According to the method and the device, the output power of the charging pile is reasonably adjusted, so that the working efficiency of the transformer-charging station system applying the method and the device is improved, and the transformer is prevented from being damaged. The method and the device are mainly used in the field of power distribution of charging stations.
Description
Technical Field
The invention relates to the technical field of power distribution, in particular to a method and a device for restraining distribution transformer overload in an electric vehicle charging station.
Background
Most of the existing energy structures are changed from petroleum to electricity consumption, electric vehicles become one of the trends of the development of the automobile industry in the world, and the electric vehicles need to be developed correspondingly in the development process. However, now in the transformer-charging station system, the topology of the transformer-charging station system is shown in fig. 2, and the charging station includes a plurality of charging poles. Due to unreasonable distribution of output power of the charging pile, the load of the transformer is increased, overload occurs, the efficiency of the whole transformer-charging station system is low, and the transformer is damaged more seriously, so that the whole transformer-charging station system is broken down.
Disclosure of Invention
The invention aims to provide a method and a device for restraining distribution transformer overload in an electric vehicle charging station, which aim to solve the problems in the prior art.
The solution of the invention for solving the technical problem is as follows: a method for restraining distribution transformer overload under an electric vehicle charging station is applied to a transformer-charging station system, wherein the charging station is composed of a plurality of charging piles, the transformer provides output power for the charging station, the method comprises a distribution transformer step, and the distribution transformer step comprises the following steps:
when St is larger than or equal to S, judging whether Y is larger than or equal to Q;
when Y is smaller than Q, adjusting the output power of each charging pile to a target power P;
when Y is larger than or equal to Q, each charging pile operates in no-load mode;
when St is less than S, operating each charging pile at full load;
wherein St is expressed as the real-time power of the transformer, SZt is expressed as the real-time power of the charging station, S is expressed as the rated power of the transformer, SCt is expressed as the real-time power of the charging pile, Y is expressed as a first parameter, and the calculation formula of Y is as follows:
q is expressed as a second parameter, and the calculation formula of Q is as follows:
the formula for P is:
further, after the step of distributing and transforming is finished, entering a waiting step, wherein the waiting step comprises: waiting a period of time.
Further, the one time period is 15min to 20 min.
Further, the one period of time is 15 min.
Further, the method also comprises the following steps: and after the waiting step is finished, returning to the distribution step.
An apparatus for suppressing distribution transformer overload at an electric vehicle charging station, the apparatus comprising: the device comprises a parameter acquisition module, a calculation module and an execution module;
the parameter acquisition module is used for acquiring St, SZt, S and SCt data and transmitting the acquired parameters to the calculation module, wherein St represents the real-time power of the transformer, SZt represents the real-time power of the charging station, S represents the rated power of the transformer, and SCt represents the real-time power of the charging pile;
the calculation module is used for calculating Y, Q and P according to the parameters transmitted by the parameter acquisition module, wherein the calculation formula of Y is as follows:
q is calculated as:
the formula for P is:
the execution module is configured to include: when St is larger than or equal to S, judging whether Y is larger than or equal to Q; when Y is smaller than Q, adjusting the output power of each charging pile to a target power P; when Y is larger than or equal to Q, all charging piles are operated in no-load mode; and when St is less than S, operating all charging piles at full load.
The invention has the beneficial effects that: according to the method and the device, the output power of the charging pile is reasonably adjusted, so that the working efficiency of the transformer-charging station system applying the method and the device is improved, and the transformer is prevented from being damaged.
Drawings
In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is clear that the described figures are only some embodiments of the invention, not all embodiments, and that a person skilled in the art can also derive other designs and figures from them without inventive effort.
FIG. 1 is a flow chart of the steps of the method;
FIG. 2 is a schematic of the topology of a transformer-charging station system;
fig. 3 is a schematic structural view of the present apparatus.
Detailed Description
The conception, the specific structure, and the technical effects produced by the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the features, and the effects of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and those skilled in the art can obtain other embodiments without inventive effort based on the embodiments of the present invention, and all embodiments are within the protection scope of the present invention. In addition, all the coupling/connection relationships mentioned herein do not mean that the components are directly connected, but mean that a better coupling structure can be formed by adding or reducing coupling accessories according to specific implementation conditions. All technical characteristics in the invention can be interactively combined on the premise of not conflicting with each other.
Embodiment 1, with reference to fig. 1 and fig. 2, a method for suppressing distribution transformer overload in an electric vehicle charging station is applied to a transformer-charging station system, where the charging station is composed of a plurality of charging piles, a topology of the transformer-charging station system is shown in fig. 2, a transformer provides output power for the charging station, the transformer refers to a device or a module conforming to an electrical characteristic of the transformer, the transformer provides output power for the charging station, and the method for suppressing distribution transformer overload in an electric vehicle charging station includes a distribution transformer step and a waiting step, and specifically includes:
s100, obtaining St, SZt, S and SCt data;
s200, judging whether St is greater than or equal to S; when St is greater than or equal to S, the process goes to step S210, and when St is less than S, the process goes to step S220;
step S220, operating all charging piles at full load; when the step S220 is completed, the process proceeds to step S300;
step S210, judging whether Y is more than or equal to Q; when Y is less than Q, the process goes to step S211, and when Y is more than or equal to Q, the process goes to step S212;
step S211, adjusting the output power of each charging pile to a target power P; when the step S211 is completed, the process proceeds to step S300;
step S212, carrying out no-load operation on each charging pile; when the step S212 is completed, the method proceeds to step S300;
step S300, waiting for 15 min; when the step S300 is completed, the process returns to the step S100;
wherein St is expressed as the real-time power of the transformer, SZt is expressed as the real-time power of the charging station, S is expressed as the rated power of the transformer, SCt is expressed as the real-time power of the charging pile, Y is expressed as a first parameter, and the calculation formula of Y is as follows:
q is expressed as a second parameter, and the calculation formula of Q is as follows:
the formula for P is:
in step S300, the waiting time period depends on the operation result of the whole transformer-charging station system, and the waiting time is generally 15min to 20min for most existing transformer-charging station systems, wherein the unit min is minute. The waiting time of 15min in step S300 is a better choice, because if the waiting time is too long, the efficiency of the whole transformer-charging station system will be reduced, and if the waiting time is too short, the whole transformer-charging station system will be too sensitive, which will affect the use of the user.
According to the method, the output power of the charging pile is reasonably adjusted, so that the working efficiency of the transformer-charging station system applying the method is improved, and the transformer is prevented from being damaged.
Referring to fig. 3, an apparatus for suppressing distribution transformer overload at an electric vehicle charging station, the apparatus being applied to a transformer-charging station system, the apparatus comprising: the device comprises a parameter acquisition module, a calculation module and an execution module.
The parameter acquisition module is used for acquiring St, SZt, S and SCt data and transmitting the acquired parameters to the calculation module, wherein St represents the real-time power of the transformer, SZt represents the real-time power of the charging station, S represents the rated power of the transformer, and SCt represents the real-time power of the charging pile.
The calculation module is used for calculating Y, Q and P according to the parameters transmitted by the parameter acquisition module, wherein the calculation formula of Y is as follows:
q is calculated as:
the formula for P is:
the execution module is configured to include: when St is larger than or equal to S, judging whether Y is larger than or equal to Q; when Y is smaller than Q, adjusting the output power of each charging pile to a target power P; when Y is larger than or equal to Q, all charging piles are operated in no-load mode; and when St is less than S, operating all charging piles at full load.
While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that the present invention is not limited to the details of the embodiments shown and described, but is capable of numerous equivalents and substitutions without departing from the spirit of the invention and its scope is defined by the claims appended hereto.
Claims (6)
1. A method for restraining distribution transformer overload under an electric vehicle charging station is applied to a transformer-charging station system, wherein the charging station is composed of a plurality of charging piles, the transformer provides output power for the charging station, and the method is characterized by comprising a distribution transformer step, and the distribution transformer step comprises the following steps:
when St is larger than or equal to S, judging whether Y is larger than or equal to Q;
when Y is smaller than Q, adjusting the output power of each charging pile to a target power P;
when Y is larger than or equal to Q, each charging pile operates in no-load mode;
when St is less than S, operating each charging pile at full load;
wherein St is expressed as the real-time power of the transformer, SZt is expressed as the real-time power of the charging station, S is expressed as the rated power of the transformer, SCt is expressed as the real-time power of the charging pile, Y is expressed as a first parameter, and the calculation formula of Y is as follows:
q is expressed as a second parameter, and the calculation formula of Q is as follows:
the formula for P is:
2. the method for suppressing distribution transformer overload at the electric vehicle charging station according to claim 1, wherein after the distribution transformer step is completed, a waiting step is performed, and the waiting step comprises: waiting a period of time.
3. The method for suppressing distribution transformer overload at the electric vehicle charging station as recited in claim 2, wherein the one time period is 15min to 20 min.
4. The method for suppressing distribution transformer overload at the electric vehicle charging station according to claim 3, wherein the one time period is 15 min.
5. The method for suppressing distribution transformer overload at the electric vehicle charging station according to claim 4, further comprising: and after the waiting step is finished, returning to the distribution step.
6. An apparatus for suppressing distribution transformer overload at an electric vehicle charging station, the apparatus comprising: the device comprises a parameter acquisition module, a calculation module and an execution module;
the parameter acquisition module is used for acquiring St, SZt, S and SCt data and transmitting the acquired parameters to the calculation module, wherein St represents the real-time power of the transformer, SZt represents the real-time power of the charging station, S represents the rated power of the transformer, and SCt represents the real-time power of the charging pile;
the calculation module is used for calculating Y, Q and P according to the parameters transmitted by the parameter acquisition module, wherein the calculation formula of Y is as follows:
q is calculated as:
the formula for P is:
the execution module is configured to include: when St is larger than or equal to S, judging whether Y is larger than or equal to Q; when Y is smaller than Q, adjusting the output power of each charging pile to a target power P; when Y is larger than or equal to Q, all charging piles are operated in no-load mode; and when St is less than S, operating all charging piles at full load.
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| CN201910934631.3A CN111409496B (en) | 2019-09-29 | 2019-09-29 | Method and device for inhibiting distribution transformer overload in electric vehicle charging station |
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Citations (8)
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| KR20110116683A (en) * | 2010-04-20 | 2011-10-26 | 한국전력공사 | Control system and method for electric vehicle charging station considering electric load pattern of associated distribution transformer |
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| CN108075536A (en) * | 2017-11-10 | 2018-05-25 | 深圳供电局有限公司 | The flexible charging regulation and control method and charging pile system of charging pile |
| CN109361245A (en) * | 2018-09-18 | 2019-02-19 | 深圳市车电网络有限公司 | The power adjustment method, apparatus and storage medium of charging station |
| CN110271448A (en) * | 2019-06-10 | 2019-09-24 | 南方科技大学 | Charging schedule method, charging schedule system and the charging station of charging station |
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2019
- 2019-09-29 CN CN201910934631.3A patent/CN111409496B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20110116683A (en) * | 2010-04-20 | 2011-10-26 | 한국전력공사 | Control system and method for electric vehicle charging station considering electric load pattern of associated distribution transformer |
| JP2016171713A (en) * | 2015-03-13 | 2016-09-23 | 株式会社東芝 | Supervision control device |
| CN106208044A (en) * | 2016-08-05 | 2016-12-07 | 海南电力技术研究院 | Charging pile and distribution transformer coordinated operation method and apparatus |
| CN107039973A (en) * | 2017-04-20 | 2017-08-11 | 国网江苏省电力公司无锡供电公司 | A kind of charging equipment of electric automobile is powered with transformer load methodology and system |
| CN107749629A (en) * | 2017-10-27 | 2018-03-02 | 深圳供电局有限公司 | A kind of control method based on the access of charging station load Real-Time Scheduling charging pile |
| CN108075536A (en) * | 2017-11-10 | 2018-05-25 | 深圳供电局有限公司 | The flexible charging regulation and control method and charging pile system of charging pile |
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| CN110271448A (en) * | 2019-06-10 | 2019-09-24 | 南方科技大学 | Charging schedule method, charging schedule system and the charging station of charging station |
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