KR20110116683A - Control system and method for electric vehicle charging station considering electric load pattern of associated distribution transformer - Google Patents

Abstract

There is provided a charging station management system for an electric vehicle that takes into account the load pattern of the distribution transformer. The charging station management system includes a load pattern calculation unit that calculates a transformer load pattern excluding the load by the charging station from load data transmitted from the transformer, and an amount of power that calculates the amount of available power from the supply power of the transformer based on the calculated transformer load pattern. And a controller configured to perform charging control on each of the plurality of chargers of the charging station based on the calculator and the calculated amount of available power.

Description

Control system and method for electric vehicle charging station considering electric load pattern of associated distribution transformer}

The present invention relates to a charging device for an electric vehicle, and more particularly, to a management system and method for a vehicle charging device capable of controlling the amount of power supplied to the charging device in consideration of the load pattern of the distribution transformer.

Recently, as part of efforts to reduce environmentally harmful gases, interest in environmentally friendly vehicles to replace conventional fossil fuel vehicles is increasing.

An electric vehicle, which is one of eco-friendly vehicles, is provided with a battery capable of charging electricity in a vehicle, and is driven by driving a vehicle motor by the power of electricity charged in the battery.

Just as conventional fossil fuel vehicles inject fuel at facilities such as gas stations, electric vehicles also operate by charging electricity in batteries at electric charging stations (eg, charging devices). These charging stations are installed throughout the country and are monitored by the operating system.

However, when simultaneous charging of an electric vehicle is performed by one charging station, the distribution network exceeds the limit of the amount of power that can be supplied to one charging station, which causes problems in power supply through the distribution network.

In particular, the power supply from the distribution transformer is limited, and if the demand for power exceeding this occurs, a problem that leads to the accident of the transformer occurs.

The present invention is to solve the above problems of the prior art, to provide a charging station management system and management method that can control the amount of power supply for each charger in consideration of the load pattern of the distribution transformer.

The charging station management system according to an embodiment of the present invention for solving the above problems, the load pattern calculation unit for calculating the transformer load pattern excluding the load by the charging station from the load data transmitted from the transformer, the calculated transformer load pattern A power amount calculating unit that calculates the available power amount from the power supply amount of the transformer based on the control unit;

The charging station management method according to an embodiment of the present invention for solving the other problem, the step of calculating the transformer load pattern excluding the load by the charging station from the load data transmitted from the transformer, based on the calculated transformer load pattern Calculating an amount of available power from the amount of power supplied to the transformer and performing charging control on each of the plurality of chargers of the charging station based on the calculated amount of available power.

The charging station management system and method considering the distribution transformer load pattern of the present invention can calculate the load pattern of the distribution transformer but exclude the load of the charging station, thereby effectively controlling the amount of power that the distribution transformer can supply to the charging station. have.

BRIEF DESCRIPTION OF THE DRAWINGS In order to better understand the drawings cited in the detailed description of the invention, a brief description of each drawing is provided.
1A and 1B are conceptual diagrams of a charging station management system according to the present invention.
2 is a block diagram according to the configuration of the charging station management system shown in FIG. 1A.
3 is a diagram showing the power used and available power of the transformer calculated by the charging station management system.
4 is a flowchart illustrating a charging station management method using the charging station management system illustrated in FIG. 2.

In order to fully understand the present invention, the operational advantages of the present invention, and the objects achieved by the embodiments of the present invention, reference should be made to the accompanying drawings that illustrate embodiments of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Like reference numerals in the drawings denote like elements.

1A and 1B are conceptual diagrams of a charging station management system according to the present invention.

Referring to FIG. 1A, the charging station management system 10 may include a management device 100, a transformer 200, and a charging station 300, and the management device 100 may charge while communicating with the transformer 200. The charging operation performed in the plurality of chargers of the station 300 may be controlled.

In addition, referring to FIG. 1B, the charging station management system 11 may further include an operation server 150 in the charging station management system 10 illustrated in FIG. 1A.

The operation server 150 may transmit a control signal, that is, a control signal for controlling a charging operation of the charging station 300, to the management device 100 while communicating with the transformer 200. The management device 100 may control the charging operation of the charging station 300 based on the control signal transmitted from the operation server 150.

Here, the management device 100 and the operation server 150 illustrated in FIGS. 1A and 1B may be configured as computing devices connected to a communication network to communicate with each other.

Hereinafter, the configuration and operation of the charging station management system according to the present invention will be described in detail with reference to FIGS. 2 to 4.

FIG. 2 is a block diagram according to the configuration of the charging station management system shown in FIG. 1A, and FIG. 3 is a diagram illustrating the used power and available power of a transformer calculated by the charging station management system.

In the present embodiment, for convenience of description, as shown in FIG. 1A, the management apparatus 100 directly communicates with the transformer 200 to the charging station management system 10 that controls the charging operation of the charging station 300. Explain.

However, the present invention is not limited thereto, and as shown in FIG. 1B, the charging station management system 11 may include a charging station (via the management device 100) while the operation server 150 communicates with the transformer 200. The charging operation of 300 may be controlled.

Meanwhile, as shown in FIG. 1B, when the charging station management system 11 is configured, the load pattern calculator 110 and the available power calculator 120 of the management device 100 illustrated in FIG. 2 are the operation server 150. ), The management device 100 may include a charging control unit 130.

1A and 2, the charging station management system 10 may include a transformer 200, a management device 100, and a charging station 300.

The transformer 200 may be connected to the charging station 300 or each of a plurality of electronic devices (not shown) to supply power. The transformer 200 may distribute and supply power allocated from an electricity production facility such as a substation (not shown) to the charging station 300 or a plurality of electronic devices.

The management device 100 may control a plurality of chargers 300_1, 300_2,... 300_N of the charging station 300 to perform charging on the electric vehicle.

For example, the management apparatus 100 calculates the amount of power that the transformer 200 can supply to the charging station 300 based on the load data output from the transformer 200 and supplies the charging station 300 to the charging station 300 according to the calculated amount of power. The charging control operation may be performed.

The management apparatus 100 may include a load pattern calculator 110, an available power calculator 120, and a charger controller.

Meanwhile, in the present embodiment, the management apparatus 100 calculates the amount of power from the load data output from the transformer 200 and uses the same to control the charging station 300 by way of example.

However, the present invention is not limited thereto, and there is a management server (not shown) that can communicate with each of a plurality of transformers, and the management server can calculate the amount of power available for each transformer and provide the same to the management device 100. In addition, the management apparatus 100 may perform a charging control operation on the charging station 300 by using a corresponding transformer available power amount among the available transformer power amounts.

The load pattern calculator 110 of the management apparatus 100 may calculate the load pattern of the transformer 200 from the load data output from the transformer 200 while communicating with the transformer 200.

For example, the load pattern calculator 110 may receive load data by the charging station 300 and a plurality of electronic devices from the transformer 200.

The load pattern calculator 110 uses only the remaining load data, that is, the load data by a plurality of electronic devices, except for the load data by the charging station 300 among the load data output from the transformer 200. The load pattern can be calculated.

Here, the load pattern calculator 110 may calculate a load pattern for each time zone of the transformer 200. To this end, the load pattern calculator 110 may collect load data output from the transformer 200 for a predetermined period of time, and calculate the load pattern for each time period of the transformer 200 by performing statistical processing for each period.

In this case, the load pattern calculator 110 may calculate a load pattern for each time zone of the transformer 200 using a method of calculating an average or a moving average from the collected load data.

The load pattern calculator 110 may calculate a seasonal load pattern or a daily load pattern for a plurality of electronic devices connected to the transformer 200 based on the load data output from the transformer 200.

The available power amount calculator 120 of the management apparatus 100 may use the available power amount that the transformer 200 may supply to the charging station 300 based on the load pattern of the transformer 200 output from the load pattern calculator 110. Can be calculated.

For example, the available power amount calculator 120 may calculate the amount of power currently being used, that is, the amount of power used by each of the plurality of electronic devices connected to the transformer 200, based on the load pattern of the transformer 200.

The available power calculation unit 120 may calculate the available power of the transformer 200 by subtracting the amount of power available from the transformer 200, that is, the amount of power used calculated from the total supply power of the transformer 200 in the no-load state. have.

Here, the no-load state may refer to a state in which the charging station 300 or each of the plurality of electronic devices is not connected to the transformer 200.

Meanwhile, since the load pattern of the transformer 200 output from the load pattern calculator 110 is a load pattern for each time zone of the transformer 200, the available power amount of the transformer 200 calculated from the available power amount calculator 120 may also be used. It may be the amount of power available for each time slot of the transformer 200.

That is, the available power amount calculator 120 may calculate the amount of power used for each time zone based on the load pattern of the transformer 200 output from the load pattern calculator 110, as shown in FIG. 3A.

In addition, the available power amount calculating unit 120 calculates the amount of available power for each time zone of the transformer 200 by subtracting the amount of power used for each time zone calculated from the total supply power of the transformer 200, as shown in FIG. 3B. can do.

The charging control unit 130 of the management device 100 may control the charging operation of the charging station 300 based on the available power amount for each time zone of the transformer 200 calculated by the available power amount calculating unit 120.

Here, the available power of each time slot of the transformer 200 calculated from the available power amount calculating unit 120 may be the available power of the charging station 300, that is, the available power that the transformer 200 may supply to the charging station 300. The charging control unit 130 may perform a charging control operation on all of the plurality of chargers 300_1, 300_2,... 300_N of the charging station 300 using the charging control unit 130.

The charging control unit 130 charges such that the amount of power consumed by the charging station 300, that is, the amount of power consumed for charging the electric vehicle does not exceed the amount of available power for each time slot of the transformer 200 output from the available power amount calculating unit 120. Control can be performed.

Meanwhile, the available power amount calculator 120 may add an offset margin to the calculated power amount available for each time zone of the transformer 200 and output the offset margin to the charging controller 130.

For example, as shown in (B) of FIG. 3, the available power amount calculator 120 adds an offset margin of approximately 5 to 10% to the calculated amount of available power for each time slot of the transformer 200 to increase the predetermined power ( It is possible to calculate the amount of available power per time zone of 200).

The charging controller 130 may perform a charging control operation of the charging station 300 based on the amount of available power for each time slot of the transformer 200 to which the offset margin is added.

This offset margin ensures a predetermined margin for a given charging station 300 because the entire number of chargers 300_1, 300_2,... 300_N of the charging station 300 does not always use the calculated amount of available power at all times. It can be added to.

In addition, the available power amount calculating unit 120 distributes the calculated amount of available power for each time slot of the transformer 200 to the total number of the plurality of chargers 300_1, 300_2,... 300_N of the charging station 300 to provide the available amount of charger available power for each time slot. It can also be calculated.

For example, N (N is a natural number) chargers 300_1, 300_2,... 300_N are located in the charging station 300, and the available power amount calculating unit 120 calculates the amount of available power for each time slot of the transformer 200. It is possible to calculate the amount of power available for the charger by time.

The charging controller 130 may perform a charging control operation for each charger by using the available charger power amount for each time period output from the available power amount calculator 120.

Here, the charging control unit 130 does not exceed the amount of power available for the charger for each time zone output from the available power calculation unit 120, the amount of power consumed by each of the plurality of chargers 300_1, 300_2, ... 300_N of the charging station 300. Charge control can be performed.

In addition, as described above, the available power amount calculator 120 adds an offset margin of 5 to 10% to the calculated power available for each time slot to calculate a predetermined increase in available power available for each time slot, and the charging controller 130 You can also output

4 is a flowchart illustrating a charging station management method using the charging station management system illustrated in FIG. 2.

2 to 4, the load pattern calculator 110 of the charging station management system 10 may calculate a load pattern from load data of the transformer 200 output from the transformer 200 (S10). .

Here, the load pattern calculator 110 calculates the load pattern for each time zone of the transformer 200 by using the remaining load data except the load data generated by the charging station 300, that is, load data by a plurality of electronic devices. Can be calculated.

The available power amount calculator 120 may calculate the amount of available power for each time zone of the transformer 200 based on the load pattern for each time zone of the transformer 200 output from the load pattern calculator 110 (S21 and S23).

For example, the available power amount calculating unit 120 calculates the amount of power used for each time zone based on the load pattern of the transformer 200, and subtracts it from the total supply power of the transformer 200, thereby making available the amount of power available for each time slot of the transformer 200. Can be calculated.

Here, the available power amount calculating unit 120 outputs the calculated power available for each time zone of the transformer 200 as available power of the charging station 300 (S21), or the available power for each time zone of the transformer 200 for the charging station. The number of chargers available for each time slot of the transformer 200 may be output by distributing the number of chargers 300_1, 300_2,...

On the other hand, the available power amount calculating unit 120 adds a preset offset margin to the calculated available time amount of the available time period of the transformer 200 or the available amount of charger available power of each time slot of the transformer 200, and the predetermined increase of the transformer 200. The amount of available power for each time slot or the charger available power for each time slot of the calculated transformer 200 may be output (S30).

The charging controller 130 may control the charging operation of the charging station 300 based on the available power amount for each time zone of the transformer 200 provided from the available power amount calculator 120 (S40).

For example, the charging controller 130 may control the charging time consumed by the charging station 300 based on the time slot charging station available from the available power calculator 120 so as not to exceed the available charging station power. have.

In addition, the charging controller 130 may be configured to charge the power consumed by each of the plurality of chargers 300_1, 300_2,... The time zone can be controlled so as not to exceed the available power.

As described above, the charging station management system and method according to the present invention, by calculating the amount of power that the transformer 200 can supply to the charging station 300 for each time zone to perform the charging control, the transformer in the charging station 300 Even if a charging demand exceeding the power supply amount of 200 occurs, it can be flexibly controlled.

Although the contents of the present invention have been described with reference to one embodiment shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible therefrom. will be. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

10: charging station management system 100: management device
110: load pattern calculator 120: available power amount calculator
130: charge control unit 200: transformer
300: charging station

Claims (10)

A load pattern calculator configured to calculate a transformer load pattern excluding the load by the charging station from the load data transmitted from the transformer;
An amount of power calculating unit configured to calculate an amount of available power from a supply amount of power of the transformer based on the calculated transformer load pattern; And
And a control unit configured to perform charging control on each of the plurality of chargers of the charging station based on the calculated amount of available power. The method according to claim 1,
The power amount calculating unit calculates the amount of available power that can be supplied to the charging station by time from the supply power of the transformer. The method according to claim 2,
The power amount calculating unit applies an offset margin to the available power amount. The method according to claim 1,
The power amount calculating unit allocates the calculated amount of available power according to the number of chargers and calculates the amount of available power for each charger by time. The method of claim 4,
The power amount calculation unit is a charging station management system to apply an offset margin to the calculated available power amount for each charger. Calculating a transformer load pattern excluding the load by the charging station from the load data transmitted from the transformer;
Calculating the available power amount from the supply power amount of the transformer based on the calculated transformer load pattern; And
Charging control for each of the plurality of chargers of the charging station based on the calculated amount of available power. The method of claim 6,
The calculating of the available power amount from the supply power amount of the transformer, the charging station management method for calculating the available power amount that can be supplied to the charging station by time from the supply power amount of the transformer. The method according to claim 7,
The calculating of the available power amount from the amount of power supplied to the transformer further includes applying an offset margin to the calculated amount of available power. The method of claim 6,
The calculating of the available power amount from the supply power amount of the transformer further includes the step of calculating the available power amount for each charger by allocating the available power amount according to the number of the plurality of chargers. The method according to claim 9,
The calculating of the available power amount from the supply power amount of the transformer further comprises applying an offset margin to the calculated available power amount for each charger.

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