KR101525566B1 - Charging control apparatus and method for electrical vehicle - Google Patents

Abstract

An apparatus for controlling charge of an electric vehicle and a method thereof are disclosed. The charging control device for an electric vehicle according to the present invention includes: a distribution power history information D / B processor for estimating and providing a power load for each distribution line; A distribution information acquisition unit for receiving and providing a power load from the distribution operation system to a real time distribution line; A charger management unit for controlling the charging of the electric vehicle according to the charging load schedule and allocating the charging load reduction amount for each time period according to the charging load reduction command to the charger for which charging reservation is set so as to adjust the charging load schedule and controlling charging through the charging load schedule; And correcting the error by reflecting a power load on the real-time distribution line provided from the distribution information acquiring unit to the electric-power-load estimation data by time slot in the electric distribution line provided from the distribution power history information D / B processing unit, And a charging operation server calculating the charging load reduction amount by time according to the power load of each distribution line to the time slot and notifying the charger management unit of the time to perform the load control.

Description

TECHNICAL FIELD [0001] The present invention relates to a charging control apparatus for an electric vehicle,

The present invention relates to an apparatus and method for controlling a charge of an electric vehicle, and more particularly, to an apparatus and method for controlling an electric automobile by controlling the charge load of an electric vehicle so as to distribute power load peaks according to a power load state of the power distribution system And more particularly, to a charging control apparatus and method for an electric vehicle.

In recent years, as part of efforts to reduce environmentally harmful gases, interest in environmentally friendly vehicles replacing conventional fossil fuel automobiles is increasing.

An electric vehicle, one of the environmentally friendly vehicles, is a vehicle equipped with a battery capable of charging electricity inside the vehicle, and driving the vehicle motor by the electric power charged in the battery.

Just as a conventional fossil fuel car injects fuel at a facility such as a gas station, the electric car also charges and charges the battery at an electric charging station (e.g., a charger). These charging stations are installed nationwide and are building a charging infrastructure.

Electricity charging infrastructure should supply electric power from the power grid. In the future, electric power facilities should be installed in the future when the charging infrastructure is going to expand, but it is difficult to expand the capacity of electric power lines and equipment as well as saturation of underground cables. When a situation arises, it is necessary to distribute the charging power supply time.

In the case that power demand is concentrated in the nationwide unit such as the power peak in the summer time zone during the current summer time, efforts to reduce the peak of the demand for power demand have been actively carried out, but the mobility of the electric vehicle, Residential area, holiday area, etc.), so that the load can be concentrated in a specific area or a specific power distribution line, and therefore, a technique (line operation) is required for each region (distribution region).

Therefore, in recent years, control of the demand management system for controlling the power load of the charging infrastructure composed of chargers in conjunction with the peak demand of domestic power is being promoted.

In this case, the applied peak load can be easily coped with the total peak demand (peak load) used in the whole country. On the other hand, in order to reduce the local peak load of the local distribution line (DL) Since it is necessary to deal directly with the power load of the distribution lines, it is very complicated depending on the situation of each site and thus it is not considered so far.

BACKGROUND ART [0002] The background art of the present invention is disclosed in Korean Patent Laid-Open Publication No. 2012-0021708 (published on Mar. 03, 2012, entitled "Electric Vehicle Charging Infrastructure Management System").

In order to control the charging load of the electric vehicle so as to reduce the power load peak of the distribution line, it is necessary to cooperate closely with the system for controlling the charging load and the related server for operating the line.

In addition, there is a need to control the charging consumers of the electric vehicle so as not to undermine the desire to minimize the charging cost as well as the desire to freely charge at a certain time. In the case of the electric power company, There is a need to control the charger.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned needs, and an object of the present invention is to provide an electric vehicle load control apparatus and a control method thereof, A charging control device for an electric vehicle and a method thereof.

Another object of the present invention is to provide a charging control apparatus and method for an electric vehicle that can minimize a charging charge by estimating a power load to a distribution line and adjusting a charging power schedule.

An apparatus for controlling charging of an electric vehicle according to an aspect of the present invention includes: a distribution power history information D / B processing unit for estimating and providing a power load by time to a distribution line; A distribution information acquisition unit for receiving and providing a power load from the distribution operation system to a real time distribution line; A charger management unit for controlling the charging of the electric vehicle according to the charging load schedule and distributing the charging load reduction amount per time unit to the charger in accordance with the charging load reduction command to adjust the charging load schedule and controlling charging through the charging load schedule; And the power estimation information of the distribution line provided from the distribution power history information D / B processing section to the real time distribution line provided from the distribution information acquisition section to correct the error, And a charge operation server for calculating a charge load reduction amount for each time period according to a power load for each time period and notifying the charge management unit of the charge amount to perform load control. Of the charging load schedule is set to a minimum, and when the charging load reduction time period is partially or wholly transferred in the charging load schedule, the maximum permissible charging load reduction amount To the charging operation server, and transmits the charging load reduction amount to the charger The charging operation server allocates the charging load reduction time period for peak power distribution to the charger management unit to minimize the increase of the charging rate generated in the charger selected so as to perform the remote control according to the power load distribution control through the charging reservation button And calculates a charge load reduction amount by time unit based on the maximum charge load reduction possible amount by time unit provided from the charger management unit after the notification.

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The present invention is characterized by further comprising an external information linking unit for encrypting data transmitted and received between the charging operation server and the charger managing unit.

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According to another aspect of the present invention, there is provided a charging control method for an electric vehicle, comprising: a charging operation server receiving a power load estimation value from a distribution power history information D / B processing unit to a national distribution line; A charging operation server receiving a power load from a power distribution information acquisition unit to a real time power distribution line; Applying a power load to a real-time power distribution line to a power load estimation value of a nationwide power distribution line to compensate a power load estimation value to a power distribution line by time; Calculating a charge load reduction amount by time according to a power load estimation value to a power line by a charging operation server; And a charging operation server receiving a charging load reduction command from the charger management unit based on the charging load reduction amount for each time line by the charging operation server. And a charging operation server estimating a charging load per distribution line according to a charging load schedule and applying the estimation to a power load estimation value of the distribution line by time slot, wherein the step of calculating a charging load reduction amount by time includes: The maximum charge load for each time period, which is the sum of the transferable load amounts that can be buffered until the charge end time, even if some or all of the charge load reduction time slots are transferred from the charge management schedule to the charger management unit after the charge load management time, And a charge management unit for receiving a charge load reduction command from the charge operation server calculates a charge load reduction amount per unit time based on the amount of chargeable amount reduction by time, When charging to the charger, charge load balancing So that the charging rate generated in the selected charger is minimized so that remote control according to the control is performed.

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The charging control apparatus and method for an electric vehicle according to the present invention can reduce the power load of the distribution system by regulating the charge load of the electric vehicle so that the peak of the electric power load is distributed according to the state of the electric power load of the distribution system.

Further, the present invention can minimize the charge rate by supporting the peak reduction subsidy by adjusting the charge power schedule by estimating the power load to the distribution line.

1 is a block diagram showing an apparatus for controlling charge of an electric vehicle according to an embodiment of the present invention.
FIG. 2 is a flowchart for explaining a charge control method of an electric vehicle according to an embodiment of the present invention.
3 is a flowchart specifically illustrating a process of calculating a power load estimation value of a distribution line in a charge control method of an electric vehicle according to an embodiment of the present invention.
4 is a graph showing interpolation data of a power load estimation value by time slot in a distribution line in a charge control method of an electric vehicle according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an apparatus and method for controlling an electric automobile according to an embodiment of the present invention will be described with reference to the accompanying drawings. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation.

In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

1 is a block diagram showing an apparatus for controlling charge of an electric vehicle according to an embodiment of the present invention.

1, the charging control apparatus for an electric vehicle according to an embodiment of the present invention includes a distribution power history information D / B processing unit 10, a distribution information acquisition unit 20, a charging operation server 30, A charger management unit 50 and an external information interface unit 40. [

The distribution schedule power history information D / B processor 10 estimates and provides a power load by time slot from a distribution DB (not shown) and a customer power information DB (not shown) to a distribution line.

The distribution power history information D / B processing section 10 extracts the power loads from the distribution DB and the consumer power information DB for one year (8,760 hours) immediately preceding each distribution line DL of the whole country, Instead of averaging the monthly data for each day of the week, the data for each day is summed up over time, and the power load for each power line is estimated and provided through the daily load estimation curve for each hour of the year.

The distribution information acquiring unit 20 receives and provides a power load from the distribution operation system (not shown) to the real-time distribution line.

Thus, it is possible to correct the error of the power load by the time slot to the power distribution line estimated from the data of the previous year.

The charger management unit 50 controls the charging of the electric vehicle according to the charging load schedule and distributes the charging load reduction amount per time unit to the charger in which charging reservation is set in accordance with the charging load reduction command to adjust the charging load schedule, .

At this time, the charge load schedule is based on the electric charge plan determined by the season and the time zone. Based on the electric charge rate of hourly (8,760 hours) per year, the charge customer presses the 'charge reservation' button of the charger to charge When participating in the load adjustment, the charger is controlled so that charging ends at the time of leaving work at the workplace and at the dawn time in the case of the residence, so that the sum of the charging charges (the daily charging rate) for each time period is minimized.

The charger 60 is a small capacity charger that is installed in a parking lot of a workplace or installed in a parking lot of a multi-family house and performs charging for a long time. The charger includes a 'charge' button, a 'charge reservation' button, When selecting 'charge' in response to the consumer's free charge intention, charge is continued until full charge is performed according to the general method without remote control.

However, if the 'charge reservation' is selected, the charge management unit 50 establishes a charge load schedule so that the charge is progressed or paused according to the power load of the distribution line, Charge it repeatedly.

The charging operation server 30 reflects the power load on the real time power distribution line provided from the power distribution information obtaining section 20 to the power load estimation data for each time slot to the distribution line provided from the distribution power history information D / B processing section 10 Correct the error.

That is, the time-scale power load estimation data for the distribution line provided from the distribution power history information D / B processing unit 10 is estimated from the data of the previous year, and an error occurs with the actual value on that day. Accordingly, the power load value to the corresponding power distribution line at the current time in the distribution operation information system provided from the distribution information acquiring unit 20 is read to correct the error of the power load estimation data by time slot. Through this error correction, the power load estimation value after this time shifts parallel to the error correction.

This error correction procedure is performed again in the set time period, and the error of the power load estimation value can be reduced as the set time is shorter.

Further, the charging operation server 30 calculates the charging load reduction amount by time in accordance with the power load of each distribution line to which the error has been corrected, and notifies it to the charger management unit 50 to perform the load control.

The charging operation server 30 notifies the charger management unit 50 associated with the power distribution line to the charging load reduction time zone when the power load adjustment is required among the distribution lines in the hall and all or part of the charging load reduction time zone The maximum charging load reduction possible amount, which is the sum of the transferable load amounts which can be buffered until the charging end time, is notified from the charger management unit 50 even if the charging load is transferred.

Therefore, the charging operation server 30 calculates the charging load reduction amount for each time slot so as to reduce some or all of the maximum reducible amount based on the maximum charging load reduction possible amount, and supplies it to the charger management unit 50 Notify.

In this way, the charger management unit 50 distributes the charging load reduction amount for each time period to the charger 60 according to the charging load reduction command, so that the charging charge generated in each charger 60 maintains the lowest value, The charging load schedule is adjusted so as to minimize the increase of the charging rate of the electric vehicle 60 so that the electric vehicle 70 can be charged.

The charging operation server 30 and the charger management unit 50 are communicated via the external information connection unit 40 through the information firewall and the data is encrypted so that information can be secured.

As described above, according to the charge control apparatus for an electric vehicle according to the present invention, the charge load of the electric vehicle can be reduced by controlling the charge load of the electric vehicle so that the peak of the electric power load is distributed according to the electric power load state of the electric power distribution system .

FIG. 2 is a flowchart illustrating a charge control method of an electric vehicle according to an embodiment of the present invention. FIG. 3 is a flowchart illustrating a method of controlling charge control of an electric vehicle according to an embodiment of the present invention. FIG. 4 is a graph showing interpolation data of a power load estimation value by time slot in a distribution line in an electric vehicle charge control method according to an embodiment of the present invention. Referring to FIG.

2 to 4, in the charging control method for an electric vehicle according to an embodiment of the present invention, the charging operation server 30 receives the electric power from the distribution power line information D / B processing unit 10, Lt; RTI ID = 0.0 > (S10). ≪ / RTI >

The process of calculating the power load estimation value to the national distribution line in the distribution power history information D / B processing unit 10 will be described with reference to FIG. 3 to FIG. 5 as follows.

The distribution power history information D / B processing unit 10 receives and stores the data of the year immediately preceding the distribution lines of about 10,000 electric power lines from the distribution network DB (not shown) and the electric power information DB (S110).

Then, the average power Pdl, m, dt, ti for the month (m, 1 to 12), day (dt, 1 to 31) (S120).

The average load of the corresponding day of each month is calculated for the data of the distribution line thus extracted and rearranged (S130).

That is, it is replaced with Pdl, m, dy, ti, which is an average power load per month (m, 1 to 12), day of the week (dy, month to day), and time period (ti, 0 to 24). Here, the method of substituting is as shown in Equation (1).

는 그 요일에 속한 날짜,

은 해당월의 일수)(only,

The date belonging to the day,

Is the number of days in the month)

The calculation result of Equation (1) is stored as Ppy (ti) which is power information of the previous year (past year) in the time period ti.

Next, the average power load for each month, the day of the week, and each time ti is calculated (S140).

One data is generated for each time, and the interpolation method can be used when the load is estimated for the values between the right times.

4, the power loads Pd1, m, dy, and ti at the time ti between the positive times tk and tk + 1 are calculated as the positive time tk (2) through Ppy (tk) and Ppy (tk + 1) which are power information of tk + 1.

On the other hand, a load estimation function can be used to easily analyze the power load to the distribution line in the future.

In other words, letting Cn be the fitting coefficient from Pdl, m, dy, tk, which is the average day load of each month, the load estimates Pdl, m, dy, and Cn (t) You can get it together.

At this time, each coefficient Cn is stored, but the power load function may be generated at any time as needed.

In this way, each power line is stored as Ppy (ti) which is power information of the time zone of the previous year (S150).

Meanwhile, when the charging operation is performed through the charger 60, the charging operation server 30 receives the charging load schedule from the charger management unit 50 (S20).

The charging load schedule input from the j-th charger management unit 50 is stored and added to the charging load schedule Pevj (ti) for each time period ti after the current time t0, and the sum Pev (ti) Σj Pevj (ti) is calculated to estimate a charging load for each distribution line (S30).

The calculation result of the power load can be applied to the power load estimation value of the power distribution line by the time lag which is calculated by the power distribution line.

Thereafter, the charging operation server 30 receives the power load from the distribution information acquiring unit 20 to the real-time distribution line to reduce the error of the load estimation (S40).

The charging operation server 30 corrects the gap between the power load Pwd (t0) to the power distribution line at the current time t0 and the power load estimation value provided from the real time distribution operating system (S50).

At this time, the power load estimation value for the time between the fixed time is obtained, and Ppy (t0) is obtained by taking the present time as the time between these. Assuming that the difference? P (t0) between the current time measured value Pwd (t0) and the power load estimated value Ppy (t0) is the same after the current time (t0) (that is to say, correcting the error by moving the power load estimation value in parallel The corrected power load estimated value Pdl (ti) for each time division (ti) distribution line can be obtained as shown in Equation (4).

If it is predicted that the power load estimation value Pdl (ti) exceeds the permissible power Pmax to the distribution line for all ti after compensating the calculated power load estimation value Pdl (ti) for each distribution line by each time slot, (30), a charge load reduction command equivalent to DELTA PDRj (ti) can be issued to the charger management unit 50 (S70), and the charge load reduction amount for each time period can be calculated as shown in Equation (5).

At this time, the charging load reduction amount for each time period can be calculated based on the maximum charging load reduction possible amount for each time period provided from the charger managing unit 50 after notifying the charging server managing unit 50 of the charging load reduction time period in the charging operation server 30 S60).

Therefore, the charging operation server 30 can calculate the charging load reduction amount for the j-th charger management unit 50 for all or some of the maximum charging load reduction possible amount by time as shown in Equation (5) (S70).

At this time,? Is a load reduction amount that can be optionally added and subtracted, and N is the number of the charger managing units 50 connected to the distribution line.

In Equation (5), the load reduction amount is uniformly distributed. However, the weight can be given to each of the charger management units 50 as required.

The charger management unit 50 having received the charge load reduction command distributes the charge load reduction amount for each time period to the charger 60 in accordance with the charge load reduction command so that the charge charge generated in each charger is maintained at the minimum value, The charging load schedule is adjusted so as to minimize the increase in the charging rate of the entire charger 60 so that the electric vehicle 70 can be charged.

When the N charger management units 50 participate in the charging load control in the time ti, the DR subsidy DR (dt) can be calculated as shown in Equation 6 (S80).

Here, d is the DR subsidy price paid per unit energy amount.

As described above, according to the charging control method for an electric vehicle according to the present invention, it is possible to reduce the power load of the distribution vehicle by regulating the charging load of the electric vehicle so that the power load peak is distributed according to the power load state of the distribution vehicle , And the charge reduction rate can be minimized by supporting the peak reduction subsidy by adjusting the charge power schedule.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. I will understand.

Accordingly, the technical scope of the present invention should be defined by the following claims.

10: Distribution power history information D / B processor
20: Distribution information acquiring unit
30: Charging Operation Server
40: External information connection unit
50: Charger management section
60: Charger
70: Electric vehicles

Claims (9)

A distribution power history information D / B processor for estimating and providing a power load for each distribution line to a time slot;
A distribution information acquisition unit for receiving and providing a power load from the distribution operation system to a real time distribution line;
A charger management unit for controlling the charging of the electric vehicle according to the charging load schedule and allocating the charging load reduction amount for each time period according to the charging load reduction command to the charger for which charging reservation is set so as to adjust the charging load schedule and controlling charging through the charging load schedule; And
Corrects an error by reflecting a power load on the real-time distribution line provided from the distribution-information acquiring unit with respect to time-scale power-load estimation data to the distribution line provided from the distribution power history information D / B processing unit, And a charging operation server for calculating a charging load reduction amount for each time period according to a power load for each distribution line,
The charging management unit establishes the charging load schedule so that the sum of the charging charges is minimized in accordance with the electric vehicle charging plan determined by season and time zone, and when a part or all of the charging load reduction time period is transferred from the charging load schedule To the charging operation server, a maximum charge load reduction possible amount by time, which is a sum of the transferable load amounts that can be buffered until the charge end time, and distributes the charge load reduction amount to the charger by the charge reservation button. The charge control unit allocates the charging rate to the charger,
Wherein the charging operation server calculates the charging load reduction amount for each time period based on the maximum charging load reduction possible amount for each time period provided from the charger managing unit after notifying the charger managing unit of the charging load reduction time for peak power distribution Charge control device of an electric vehicle.
delete delete The apparatus of claim 1, further comprising an external information connection unit for encrypting data transmitted and received between the charging operation server and the charger management unit.
delete Receiving a power load estimation value from a distribution power history information D / B processing unit to a national distribution line;
Receiving the power load from the power distribution information acquisition unit to the real time power distribution line;
Applying a power load to the real-time power line to the power load estimation value of the power distribution line to the charging operation server to compensate the power load estimation value of the power line to the power distribution line by time slot;
Calculating a charge load reduction amount for each time period according to a power load estimation value of the power line to the power line by the charging operation server; And
And the charging operation server issuing the charging load reduction command to the charger management unit based on the charging load reduction amount by the time slot,
The charging operation server receiving and storing a charging load schedule for each distribution line from the charger management unit; And
Further comprising the step of the charging operation server estimating a charging load per distribution line according to the charging load schedule and applying the estimated charging load to the power load estimation value of the distribution line by time slot,
The step of calculating the charging load reduction amount by time unit may include the step of transferring part or all of the charging load reduction time period from the charging load schedule from the charger management unit after the charging operation server notifies the charging load reduction time slot to the charger management unit The maximum charge load reduction possible amount for each time period, which is the sum of the transferable load amounts that can be buffered by the charge end time, is calculated, and the charge load reduction amount for each time period is calculated based on the maximum charge load reduction possible amount for each time slot ,
When the charger management unit for receiving the charge load reduction command from the charge operation server allocates the charge load reduction amount for each time period to the charger, And the charge is distributed so as to minimize the increase of the charge rate.
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