KR102359149B1 - V2g-v2b system of managing power for connecting v2g and v2b and operation method thereof - Google Patents

Abstract

The present invention relates to a V2G-V2B system for managing power by linking V2G and V2B and an operating method thereof, and the V2G-V2B system for managing power by linking V2G and V2B according to an embodiment of the present invention, a charger management system that manages charging/discharging to meet the amount of electric power required to be charged (ie, a reference amount) of the electric vehicle according to the charging/discharging schedule for the electric vehicle; a V2G-V2B management system that manages charging/discharging of the electric vehicle according to the priority of a preset demand response request; and a V2G information system that generates charge/discharge information managed by the charger management system and the V2G-V2B management system and transmits it to the customer terminal.

Description

V2G-V2B system that manages electricity by linking V2G and V2B and its operation method

The present invention relates to a V2G-V2B system for managing power by linking V2G and V2B and a method for operating the same. Specifically, in managing power by creating a charge/discharge schedule for an electric vehicle and interconnecting V2G and V2B , a V2G-V2B system that manages power by linking V2G and V2B to effectively combine and use V2G and V2B services by performing charge/discharge control for normal, ready-to-read, and emergency situations according to preset priorities; and It's about how it works.

An electric vehicle (EV) drives a motor with power from a battery instead of the engine of a general vehicle. Recently, research on V2G (Vehicle to Grid) technology for power demand management using such an electric vehicle is in progress.

V2G refers to the efficient use of energy by using the power in the battery of an electric vehicle to drive the vehicle in normal times, and transmitting the charged power through the power grid when a peak in power consumption occurs. In simple terms, electric vehicle drivers charge their batteries during late-night hours when electricity rates are low, and after returning to work, sell the remaining power in the batteries during peak hours. Then, customers can make money by selling electricity to the utility at peak times, and the utility can reduce the utilization rate of the power plant. In other words, V2G can naturally manage demand.

V2G can be used as V2H (Vehicle to Home), V2B (Vehicle to Building), and V2D (Vehicle to Device). V2H and V2B are used as an emergency generator in case of a power outage, and are used in conjunction with EMS (Energy Management System) to efficiently use household electricity in normal times. V2D provides a convenient service for using electricity outdoors by linking with electronic products such as TVs, lights, computers, and refrigerators in outdoor camping.

In this way, V2G using electric vehicles is seeking DR participation transactions through the current demand response resource market in various ways for the purpose of reducing the peak and cost of the nationwide system.

However, V2G has limitations in forming an independent market. In other words, V2G is not suitable as a trading resource when considering the size of electric vehicles (20MW), market operation rules, and technical standards in various power trading markets targeting generators such as energy, capacity, and auxiliary services. In addition, as a single resource in the demand response market, V2G is difficult to meet various pre-requisites such as resource registration standards and reduction/response tests. There are restrictions on activation. In addition, the current DR service in which demand management companies participate is a peak reduction service in case of emergency and requires customer participation for up to 4 hours per event. . In addition, it is possible to participate in the fee-saving Demand Response service according to the customer's will, but in this case, the contract conclusion is determined according to the pre-bidding competition with power generation resources, and only the DR transaction performance, not the basic capacity, is settled, so there is still inconvenience to customers and insufficient economic feasibility. I have a problem.

Therefore, it is necessary to configure V2G mixed resources by linking with resources of other demand management providers, and to provide market-linked (system unit) DR service in case of emergency.

However, in order to provide a market-linked demand response service, electric vehicle resources of a certain size or more must be connected to several chargers at a specific time, and large-scale electric vehicles must be available at the same time in order to reduce the peak load of the entire power system. Restrictions exist. Moreover, since the current domestic power system has sufficient reserve power, the possibility of occurrence of a peak in the entire power system is low, but the possibility of occurrence of a local peak in a specific distribution line and building unit is high.

Therefore, it is necessary to find a way to contribute to the improvement of energy management efficiency of specific distribution lines (D/L) and individual buildings as well as the entire power system in connection with other systems.

An object of the present invention is to create a charge/discharge schedule for an electric vehicle and manage power by linking V2G and V2B, by performing charge/discharge control for normal, ready-to-read, and emergency situations according to preset priorities, An object of the present invention is to provide a V2G-V2B system that manages power by linking V2G and V2B to effectively combine and use V2G and V2B services, and an operating method thereof.

In addition, it is an object of the present invention to use V2G and V2B technologies, which are emerging as important factors for the spread of electric vehicles and charging infrastructure, to stabilize the power system through connection with the current demand response market and to improve the efficiency of own building energy management. .

In addition, it is an object of the present invention to provide a system that enables more free transactions, free from the strict registration and response requirements of the current demand resource market, because it uses the battery surplus power of an electric vehicle that is parked after driving as a V2G resource.

The V2G-V2B system for managing power by linking V2G and V2B according to an embodiment of the present invention meets the required amount of power required for charging of the electric vehicle (that is, the reference amount) according to the charge/discharge schedule for a plurality of electric vehicles. a charger management system that manages charging/discharging; a V2G-V2B management system that manages charging/discharging of the electric vehicle according to the priority of a preset demand response request; and a V2G information system that generates charge/discharge information managed by the charger management system and the V2G-V2B management system and transmits it to the customer terminal.

The V2G-V2B management system, in conjunction with a demand management system (DRMS) and a building management system (BEMS), is characterized in that it receives the demand response request from each of the demand management system and the building management system.

The V2G-V2B management system is characterized in that the demand response participation of the demand management system proceeds in priority over the demand response participation of the building management system.

The V2G-V2B management system, when participating in the demand response of the demand management system, limits charging of the battery of the electric vehicle and switches to a discharge mode in which the electric power charged in the battery of the electric vehicle is transmitted to the power system It is characterized in that it controls the charging/discharging operation.

The V2G-V2B management system, when participating in the demand response of the building management system, limits the charging of the battery of the electric vehicle and switches to a discharge mode in which the electric power charged in the battery of the electric vehicle is transmitted to the corresponding building It is characterized in that it controls the charging/discharging operation.

The charger management system is characterized in that it receives power generated by a renewable energy source in order to meet the amount of power required for charging of the electric vehicle.

The V2G-V2B management system is characterized in that the amount of power generation of the renewable energy source is calculated.

The charger management system, when the amount of power required for charging is equal to or greater than the amount of power generated by the renewable energy source, it is characterized in that the insufficient amount of the power generation with respect to the amount of power required for charging is supplied from the power grid system.

The charger management system, when the amount of power required for charging is less than the amount of power generated by the renewable energy source, it is characterized in that the surplus of the amount of power generation with respect to the amount of power required for charging is supplied to the building management system.

The surplus amount is characterized in that the actual filling amount or more.

The building management system is characterized in that the surplus that may occur after charging is supplied to the power grid system.

The charger management system derives a charging gradient for each charger connected to each electric vehicle through initial charging at a predetermined time, and establishes a charging/discharging schedule for the electric vehicle using the charging gradient .

The charger management system is characterized in that it is reflected in the charge/discharge schedule by predicting the amount of power generated by the renewable energy source and the amount of power required to charge the electric vehicle every day.

In addition, the operating method of the V2G-V2B system for managing power by linking V2G and V2B according to an embodiment of the present invention predicts the amount of power generated by a new renewable energy source and the amount of power required for charging of a plurality of electric vehicles to be charged/discharged establishing a schedule; comparing the power generation amount and the required charging power amount in managing the charging/discharging of the electric vehicle according to the charging/discharging schedule; and supplying the surplus amount of the power generation amount with respect to the charge required power amount to the building management system according to the comparison result.

After the comparison step, the step of receiving the insufficient amount of the power generation amount with respect to the charging demand power amount from the power grid system according to the comparison result; further includes.

After the establishment step, when receiving a demand response request from a demand management system (DRMS) or a building management system (BEMS), proceeding to participate in the demand response according to a preset priority; further includes.

The DR participation step is characterized in that the DR participation of the demand management system is preceded by the DR participation of the building management system.

The step of participating in the demand response includes limiting charging of a battery of the electric vehicle and switching to a discharge mode for transmitting electric power charged in the battery of the electric vehicle to operate.

The present invention can promote power system stabilization and self-building energy management efficiency improvement by linking with the current demand response market by using V2G and V2B technologies, which are emerging as important factors for the spread of electric vehicles and charging infrastructure.

In addition, since the present invention uses the battery spare power of an electric vehicle that is parked after driving primarily as a V2G resource, it is possible to provide a system capable of more freely transacting away from the strict registration and response requirements of the current demand resource market.

In addition, the present invention provides an emergency V2G service for stabilizing the entire power system or saving electricity rates according to the electric power market directive, as well as a V2B (V2B for building energy management efficiency improvement) service in preparation for peak reduction of distribution lines and building units. Therefore, it is possible to effectively combine and operate V2G and V2B services in emergency, preparation, and normal times, respectively.

In addition, according to the present invention, if an electric vehicle is first charged in connection with a new and renewable energy source whose output fluctuates greatly depending on the natural environment, it can be expected to contribute to securing power system stability and reduce losses in the transmission and transformation process, and is environmentally friendly nationally. It is possible to form a structure that enables simultaneous production and consumption of electric power.

In addition, the present invention can effectively combine V2G and V2B services in emergency, preparation and normal times, respectively, so demand situation (emergency/normal), electricity rate (day/night), power generation source environment (sun, wind, etc.), Flexible and efficient use of electricity is possible according to demand regions (high/low demand, national/region), etc.

In addition, according to the present invention, electric vehicles are first charged in connection with a new and renewable energy source whose output fluctuates greatly depending on the natural environment, thereby securing power system stability (reducing output fluctuations), reducing transmission and substation losses, eco-friendly power production and power consumption, etc. An industrial ripple effect can be expected.

1 is a view showing a V2G-V2B system for managing power by linking V2G and V2B according to an embodiment of the present invention;
2 is a view showing an operating method of the V2G-V2B system of FIG. 1;
3 is a view showing an example of a charging target amount achievement schedule in the charger management system of FIG. 1;
4 is a view showing an example of setting the V2G reference amount in the charger management system of FIG. 1;
5 is a diagram illustrating an example of a charging/discharging process in the charger management system of FIG. 1 .

In order to fully understand the present invention, preferred embodiments of the present invention will be described with reference to the accompanying drawings. Embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be construed as being limited to the embodiments described in detail below. This example is provided to more completely explain the present invention to those of ordinary skill in the art. Accordingly, the shapes of elements in the drawings may be exaggerated to emphasize a clearer description. It should be noted that the same members in each drawing are sometimes shown with the same reference numerals. Detailed descriptions of well-known functions and configurations determined to unnecessarily obscure the gist of the present invention will be omitted.

1 is a diagram illustrating a V2G-V2B system for managing power by linking V2G and V2B according to an embodiment of the present invention.

As shown in FIG. 1 , the V2G-V2B system 100 according to an embodiment of the present invention includes a charger management system 110 , a V2G-V2B management system 120 , and a V2G-V2B information system 130 . and these systems are interconnected.

Here, the V2G-V2B system 100 is limited to a complex system linking an electric vehicle, a charger, and a building. It can be applied flexibly depending on the situation to which the electric vehicle customer belongs. In addition, here, the V2G-V2B system 100 is described assuming that the electric vehicle is charged directly from the renewable energy source 123 , but it is connected to the building management system 122 when a large-capacity new and renewable energy source facility is built. Therefore, it can be applied to the case as well.

The V2G-V2B system 100 monitors the amount of power generation of the renewable energy source 123 and calculates the V2G-V2B power demand (ie, the supply standard amount) on the day. The V2G-V2B system 100 may supply a surplus supply amount, that is, a surplus amount, back to the power grid system 113 or the building management system 122 . In addition, the V2G-V2B system 100 generates a charge/discharge schedule using the V2G-V2B power demand (ie, the supply standard amount), and when the power generation amount of the renewable energy source 123 is insufficient, the shortage will be supplied from the power system. can

In addition, the V2G-V2B system 100 controls charging/discharging according to V2G and V2B charging/discharging priorities. First, the V2G-V2B system 100 determines whether the amount of power generated by the renewable energy source 123 meets the pre-calculated charging demand of the V2G-V2B system (that is, the charging demand of the electric vehicle) in normal times, and the surplus When it occurs, it is supplied to the building management system 122 . Next, the V2G-V2B system 100 is a pre-defined priority in the case of an emergency in which the V2G instruction by the demand management system 121 occurs or in preparation for the V2B instruction by the building management system 122 to occur. It operates in response to a V2G instruction or a V2B instruction by limiting the charging of power and switching to a discharging mode. That is, the V2G-V2B system 100 performs V2G control to the power system in an emergency, and performs V2B control in preparation.

Hereinafter, each component of the V2G-V2B system 100 will be described.

First, the charger management system 110 creates charge/discharge schedules for a plurality of electric vehicles 10 and 20 and is responsible for the activity of meeting the charging demand of the V2G-V2B system.

The charger management system 110 is connected to a plurality of AC chargers 111 and DC chargers 112, and through this, it is possible to charge/discharge batteries of a plurality of electric vehicles (EVs) 10 and 20 . The DC charger 112 includes an AC-DC converter 112b. Here, the charger management system 110 is connected to the communication controllers 11 and 21 of the electric vehicles 10 and 20 through the communication controllers 111a and 112a of the chargers 111 and 112, respectively.

For this reason, the charger management system 110 can check the charge/discharge status information of the plurality of electric vehicles 10 and 20, and create and manage charge/discharge schedules for the plurality of electric vehicles 10 and 20. have. In this case, the charger management system 110 predicts the daily renewable energy generation amount (ie, supply amount) and the electric vehicle charging demand and reflects it in the charge/discharge schedule.

In addition, when the charger management system 110 operates in response to the V2G-V2B management system 120 responding to the V2G instruction or the V2B instruction in real time, the charging/discharging schedule (completion time) to achieve the target charge amount set by the customer on the day can be reestablished in real time.

The charger management system 110 may predict the charge/discharge amount of the electric vehicles 10 and 20 on the day using the V2G-V2B system scheduler. Through this, the charger management system 110 can automatically calculate the target amount of charge for the day and the lower limit of discharge, etc. through the economic charging mode, and calculate the charging slope for slow charging/discharging. In addition, the charger management system 110 may transmit the charge table for each time period, the charge/discharge conversion mode (time), and the like in advance. In addition, the charger management system 110 may monitor the state of multiple charging stations/chargers and provide a charging reservation function.

Next, the V2G-V2B management system 120 operates according to the priority set in advance for the demand response request to the power system or the building.

The V2G-V2B management system 120 communicates with the Demand Response Management system (DRMS, 121), the Building Energy Management System (BEMS, 122) and the performance settlement system (not shown) to communicate with V2G Calculate, measure and settle operational information related to V2B status, time, required time, transaction volume, and transaction performance. And, the V2G-V2B management system 120 transmits the operation information to the charger management system (110).

Here, the demand management system 121 is active in the demand response market 121a to maintain the balance of supply and demand through adjustment of electricity rates or power reduction by load reduction instructions when a supply crisis occurs due to reasons such as peak power demand. It is a system that manages The building management system 122 is a system that improves energy use efficiency by collecting and analyzing various information of the energy management facility 122a in a building in real time, and manages energy consumption, facility operation status, indoor environment and carbon emission.

In addition, the V2G-V2B management system 120 calculates the average power generation amount of the renewable energy source (123). The average amount of power generation of the renewable energy source 123 is reflected in the charge/discharge schedule of the electric vehicles 10 and 20 every day. Here, the new and renewable energy source 123 is a new energy source (fuel cell, hydrogen energy, etc.) used by converting the existing fossil fuel and a renewable energy source (solar light, solar heat, bio, wind power, etc.) used by converting renewable energy hydraulic power, etc.).

The V2G information system 130 generates V2G-V2B enforcement information and transmits it to the customer terminal 131 . That is, the V2G information system 130 generates charge/discharge information managed by the charger management system 110 and the V2G-V2B management system 120 and transmits it to the customer terminal 131 .

As described above, since the V2G-V2B system 120 uses the battery surplus power of an electric vehicle that is being parked after driving primarily as a V2G resource, it is possible to free trade free from the strict registration and response requirements of the current demand resource market. system can be provided.

In addition, the V2G-V2B system 120 provides V2B (building energy management efficiency improvement) in preparation for peak reduction of distribution lines and building units as well as emergency V2G service that promotes stabilization of the entire power system or reduction of electricity rates according to the electric power market directive V2B) services are provided, so it is possible to effectively combine and operate V2G and V2B services in emergency, preparation, and normal times, respectively.

In addition, since the V2G-V2B system 120 accurately predicts the power supply amount of the new renewable energy source and the charging standard amount of the electric vehicle on a specific day and performs load supply management, it is possible to manage a plurality of chargers at the same time and appropriately control them.

In addition, the V2G-V2B system 120 predicts the amount of power supply and charging demand based on the past new and renewable energy generation data and electric vehicle driving data, and the unavoidable error with the actual driving amount that occurs according to the unspecified demand response instruction. It is possible to control charging/discharging that can achieve the charging target amount set by the customer on the same day after the response and operation to the demand response instruction.

If the V2G-V2B system 120 is first charged to an electric vehicle in connection with a new and renewable energy source whose output fluctuates greatly depending on the natural environment, it can be expected to contribute to securing the stability of the power system and reduce losses in the transmission and transformation process. As a result, it is possible to form a structure that enables the simultaneous production and consumption of eco-friendly power.

FIG. 2 is a diagram illustrating an operating method of the V2G-V2B system of FIG. 1 .

Before describing FIG. 2 , terms for describing an operating method of the V2G-V2B system 100 will be defined.

First, in V2G, the amount of power corresponding to the amount of power required to be charged (the amount of power required for charging) of electric vehicles 10 and 20, etc. is hereinafter referred to as “V2G standard amount”, and the amount of power generated and supplied by the renewable energy source 123 is below. It is called “renewable energy generation”. In addition, the amount of surplus power that is actually charged in the electric vehicles 10, 20, etc. in V2G is hereinafter referred to as "V2G surplus", and the amount of power in the shortfall is hereinafter referred to as "V2G shortfall". And, like V2G, in V2B, the amount of excess power is hereinafter referred to as "V2B surplus", and conversely, the amount of power in the shortfall is hereinafter referred to as "V2B shortfall".

The charger management system 110 calculates the V2G reference amount, the V2G surplus, and the V2G shortage, and the V2G-V2B management system 120 calculates the amount of renewable energy generation. The building management system 122 calculates the V2B surplus and V2B shortfall.

The amount of generation of the renewable energy source 123 varies according to the generation situation (illuminance, wind, wave, A/S, etc.) of the Renewable Generation (RG) (RG1, RG2). The renewable energy source 123 preferentially supplies the amount of renewable energy generation to the charger management system 110 for stabilizing the output fluctuation of the system (ie, reducing output fluctuation). In addition, the renewable energy source 123 transmits real-time generation amount information to the V2G-V2B management system 120 . The V2G-V2B management system 120 monitors the power generation state of the renewable energy source 123 and calculates the amount of renewable energy generation.

The charger management system 110 compares the amount of renewable energy generation and the V2G reference amount (S1). At this time, if the amount of renewable energy generation is less than the V2G reference amount (S1), the charger management system 110 receives the V2G insufficient amount from the power grid system 113 . That is, when the amount of renewable energy generation is insufficient to charge the electric vehicle, the charger management system 110 receives the V2G shortage from the power grid system 113 to satisfy the V2G standard amount. Here, when the charger management system 110 receives power through the building management system 122, preferentially, the V2G shortfall is supplied from the building management system 122, and the power grid system 113 can be supplied in the next lane. have.

Next, the charger management system 110 supplies the V2G surplus to the building management system 122 when the amount of renewable energy generation is equal to or greater than the V2G reference amount (S1). In this case, the V2G surplus may be a case of satisfying the condition of the charging amount or more. That is, the charger management system 110 normally supplies the V2G surplus amount to the building management system 122 except for the amount of power required for the self-operating system.

As such, the building management system 122 is preferentially supplied with V2G surplus in normal times. However, the building management system 122 may generate a V2B shortage during normal daytime. In this case, the building management system 122 preferentially receives power from its own power storage device such as an EESS (Electrical Equipment Safety System), and then, if necessary, power from the power grid system 113 or the V2G-V2B system 100 . may be supplied additionally. In this case, the building management system 122 may receive power from an inexpensive power supply network by comparing the power rate of the power grid system 113 with the power rate of the V2G-V2B system 100 . That is, the building management system 122 normally charges the V2G surplus from the V2G-V2B system 100, utilizes the stored power of its own power storage device, and receives the power required according to the priority of receiving power from the power grid. secure

In addition, the building management system 122 supplies the V2B surplus (ie, load supply, EESS charging, surplus after system operation) that may occur after charging to the power grid system 113 . In this case, the V2B surplus may be a case where a condition is satisfied that is equal to or greater than the charging amount.

On the other hand, the V2G-V2B management system 120 is 'emergency' when there is a demand response request by the demand management system 121, 'always ready' when there is a demand response request by the building management system 122, In the case of no demand response request by the demand management system 121 and the building management system 122, the priority is determined and operated as follows. As such, the V2G-V2B management system 120 prioritizes the participation in DR of the national power system unit rather than the DR participation of the building unit.

First, in 'emergency', it occurs at a power peak of the power system or prior market bidding. This may be the case in which the participation in DR is notified through competitive bidding for power generation resources and price of the DR potential. Specifically, when the V2G-V2B management system 120 receives a request to participate in the demand response to the power system from the demand management system 121 (ie, V2G instruction), the electric vehicle 10, 20), the battery charging is restricted, and a discharge mode in which the electric power charged in the batteries of the electric vehicles 10 and 20 is transmitted to the power grid system 113 is implemented (S2). At this time, the demand management system 121 receives the V2G instruction result confirmation and notification from the power grid system 113 . In this way, when the V2G-V2B management system 120 receives a DR request from the demand management system 121 , it preferentially participates in the DR request.

Next, 'always ready' occurs in cases such as power peak of a specific building, maximum load of a specific building on the day, instantaneous power outage of a specific building, etc. Specifically, when the V2G-V2B management system 120 receives a request to participate in the demand response to the building from the building management system 122 (ie, V2B instruction), the electric vehicle 10, 20) to limit the battery charging, and to perform a discharge mode in which the electric power charged in the batteries of the electric vehicles 10 and 20 is transmitted to the corresponding building (S2).

Next, in 'normal', there is no V2G instruction to the power system or V2B instruction to the building. That is, the charger management system 110 supplies only the V2G surplus amount to the building management system 122 excluding the power required for the operation of the V2G-V2B system 100 as described above. That is, the charger management system 110 controls the discharge mode in which the electric power charged in the batteries of the electric vehicles 10 and 20 is discharged, so that the electric power is not supplied to the building management system 122 below the V2G reference amount.

3 is a diagram illustrating an example of a charging target amount achievement schedule in the charger management system of FIG. 1 .

After connecting the electric vehicle and the charger, the charger management system 110 checks the battery state through initial charging for a predetermined time, and establishes a charging target amount achievement schedule accordingly to charge/discharge the electric vehicles 10 and 20 carry out Here, the charger management system 110 derives the charging slope of the corresponding battery through charging for a predetermined time (eg, about 10 minutes), and uses the charging slope of the battery to achieve the charging target value set by the customer. Establish a schedule to achieve the charging target amount.

Referring to FIG. 3 , when the charger management system 110 connects the electric vehicle and the charger to each other in the morning of the same day, the battery is charged through the initial charge for about 10 minutes (that is, 9:00 AM to 9:10 AM). A slope (S) can be derived. Here, the charging slope (S) represents the state of charge (SOC) (%) per time (time).

The charger management system 110 establishes a charging target amount achievement schedule to achieve the charging target amount set by the customer based on the charger slope S.

The charger management system 110 performs charging in a time zone indicating the cheapest rate section according to a pre-determined daily electricity rate table. However, this charging method proceeds when the economic charging mode is selected by the customer, and since the charging time period is limited, charging for a long time may be required. On the other hand, when the fast charging mode is selected by the customer, charging may proceed for all sections regardless of the charge section.

4 is a diagram illustrating an example of setting the V2G reference amount in the charger management system of FIG. 1 .

The charger management system 110 derives the charging slope (S) for each charger through the initial charging in the morning (eg, 9:00 am) of the day, and establishes a charging goal achievement schedule for each charger using the charging slope . Based on this, the charger management system 110 may predict the 'V2G reference amount', which is the sum of the charge/discharge requirements of the entire charger, that is, the charge/discharge demand of the V2G-V2B system 100 .

Here, the charger management system 110 executes a charge/discharge schedule by comparing the predicted amount of the new and renewable energy generation amount on the day and the predicted amount of the V2G reference amount. In addition, the charger management system 110 performs rescheduling including a correction operation for the charge/discharge schedule while performing real-time monitoring for the execution error of the charge/discharge schedule. And, the charger management system 110, when a shortage for the V2G reference amount occurs at a specific point in time, the V2G-V2B management system 120 through the power system or the EESS (energy storage device) of the building management system 122 through the reserve It is possible to implement power supply/funding.

For example, in FIG. 4 , the maximum demand load (100%) of the day is predicted around 14:00 on the day. At this time, it is predicted that the maximum amount of renewable energy generation will be located in the 'range of point a to point b'. That is, when the maximum supply of renewable energy generation is formed at 'a', 'surplus' is generated because the amount of renewable energy generation (ie, supply) is greater than the V2G standard amount (ie, demand). On the other hand, when the maximum supply amount of renewable energy generation is formed at 'b', a 'shortage' occurs because the amount of renewable energy generation (ie, supply) is smaller than the V2G standard amount (ie, demand). In the latter case, the charger management system 110 may calculate the actual controllable load amount at a specific time in order to solve the insufficient amount of power. Calculation variables include renewable energy generation, average electric vehicle charge, electric vehicle battery (SOC), charge rate, V2G/V2B flexibility and time.

5 is a diagram illustrating an example of a charging/discharging process in the charger management system of FIG. 1 .

The charger management system 110 starts negotiating a charging period with the electric vehicle for charging in the V2G-V2B system (S11), and then charges the amount of power as much as the V2G standard amount (charging demand) (S12).

Thereafter, when a V2G or V2B instruction occurs, the charger management system 110 controls the charging limit for the electric vehicle and switches to a discharging mode (S13). After operating in response to the V2G or V2B instruction, the charger management system 110 renegotiates a charging period with an electric vehicle (EV) and an electric vehicle charging facility (EVSE) (S14).

In addition, the charger management system 110 switches to the standby mode after negotiation and proceeds to charge again (S15, S16), or returns to the standby mode and renegotiates the charging period with electric vehicles and electric vehicle charging facilities. (S17,S18).

On the other hand, the charger management system 110 may perform discharging immediately after negotiation to switch to the termination mode (S19, S20), or may switch from the standby mode to the termination mode after charging (S17, S21).

The embodiments of the present invention described above are merely exemplary, and those of ordinary skill in the art to which the present invention pertains will appreciate that various modifications and equivalent other embodiments are possible therefrom. Accordingly, it will be understood that the present invention is not limited to the forms mentioned in the above detailed description. Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims. Moreover, it is to be understood that the present invention covers all modifications, equivalents and substitutions falling within the spirit and scope of the invention as defined by the appended claims.

10, 20: electric vehicle 11. 21: communication controller
110: charger management system 111: AC charger
112: DC charger 111a, 112a: communication controller
112b AC-DC converter 113 power grid system
120: V2G-V2B management system 121: demand management system (DRMS)
121a: Demand Response Market 122: Building Management System (BEMS)
122a: energy management facility 123: renewable energy source
130: V2G-V2B information system

Claims (20)

a charger management system that manages charging/discharging to satisfy the amount of electric power required to be charged (ie, a reference amount) of the electric vehicle according to a charge/discharge schedule for a plurality of electric vehicles;
a V2G-V2B management system that manages charging/discharging of the electric vehicle according to the priority of a preset demand response request; and
and a V2G information system that generates charge/discharge information managed by the charger management system and the V2G-V2B management system and transmits it to a customer terminal.
The charger management system derives a charging gradient for each charger connected to each electric vehicle through initial charging at a predetermined time, and uses the charging gradient to establish a charge/discharge schedule for the electric vehicle. A V2G-V2B system that manages power in conjunction.
The method of claim 1,
The V2G-V2B management system,
V2G that manages electricity in connection with V2G and V2B, characterized in that in conjunction with a demand management system (DRMS) and a building management system (BEMS), the demand response request is received from each of the demand management system and the building management system -V2B system.
3. The method of claim 2,
The V2G-V2B management system,
V2G-V2B system for managing electricity by linking V2G and V2B, characterized in that the demand response participation of the demand management system takes precedence over the demand response participation of the building management system.
4. The method of claim 3,
The V2G-V2B management system,
When participating in the demand response of the demand management system, charging/discharging is controlled by limiting the charging of the battery of the electric vehicle and switching to a discharge mode in which the electric power charged in the battery of the electric vehicle is transmitted to the power system V2G-V2B system for managing power by linking V2G and V2B, characterized in that
4. The method of claim 3,
The V2G-V2B management system,
When participating in the demand response of the building management system, charging/discharging is controlled by limiting the charging of the battery of the electric vehicle and switching to a discharge mode in which the electric power charged in the battery of the electric vehicle is transmitted to the corresponding building V2G-V2B system for managing power by linking V2G and V2B, characterized in that
The method of claim 1,
The charger management system,
A V2G-V2B system for managing power by linking V2G and V2B, characterized in that receiving power generated by a renewable energy source in order to meet the amount of power required for charging of the electric vehicle.
7. The method of claim 6,
The V2G-V2B management system,
V2G-V2B system for managing power by linking V2G and V2B, characterized in that calculating the amount of power generation of the renewable energy source.
8. The method of claim 7,
The charger management system,
V2G-V2B system for managing power by linking V2G and V2B, characterized in that when the amount of power required for charging is greater than or equal to the amount of power generated by the renewable energy source, the insufficient amount of power generation with respect to the amount of power required for charging is supplied from the power grid system.
8. The method of claim 7,
The charger management system,
V2G-V2B that manages power by linking V2G and V2B, characterized in that when the amount of power required for charging is less than the amount of power generated by the renewable energy source, the surplus amount of power generation for the amount of power required for charging is supplied to a building management system system.
10. The method of claim 9,
V2G-V2B system for managing power by linking V2G and V2B, characterized in that the surplus amount is greater than or equal to the actual charge amount.
10. The method of claim 9,
The building management system,
A V2G-V2B system that manages power by linking V2G and V2B, characterized in that the surplus that may occur after charging is supplied to the power grid system.
12. The method of claim 11,
V2G-V2B system for managing power by linking V2G and V2B, characterized in that the surplus amount is greater than or equal to the actual charge amount.
delete The method of claim 1,
The charger management system,
A V2G-V2B system for managing power by linking V2G and V2B, characterized in that the daily power generation of renewable energy sources and the amount of power required for charging of the electric vehicle are predicted and reflected in the charge/discharge schedule.
establishing a charge/discharge schedule by predicting, by the charger management system, the amount of power generated by the renewable energy source and the amount of power required for charging of a plurality of electric vehicles;
comparing, by the charger management system, the amount of power generation and the amount of power required for charging, when managing the charging/discharging of the electric vehicle according to the charging/discharging schedule; and
and supplying, by the charger management system, the surplus of the amount of power generation with respect to the amount of power required for charging to the building management system according to the comparison result;
The charger management system derives a charging gradient for each charger connected to each electric vehicle through initial charging at a predetermined time, and uses the charging gradient to establish a charge/discharge schedule for the electric vehicle. A method of operating a V2G-V2B system that manages power in conjunction.
16. The method of claim 15,
After the comparison step,
receiving, from a power grid system, the insufficient amount of the power generation amount for the charging required power amount according to the comparison result;
Operating method of a V2G-V2B system for managing power by linking V2G and V2B further comprising a.
16. The method of claim 15,
After the establishment step,
when receiving a DR request from a demand management system (DRMS) or a building management system (BEMS), performing DR participation according to a preset priority;
Operating method of a V2G-V2B system for managing power by linking V2G and V2B further comprising a.
18. The method of claim 17,
In the step of participating in the demand response,
An operating method of a V2G-V2B system for managing electricity by linking V2G and V2B, characterized in that the demand response participation of the demand management system takes precedence over the demand response participation of the building management system.
18. The method of claim 17,
In the step of participating in the demand response,
limiting charging of the battery of the electric vehicle and switching to a discharge mode for transmitting electric power charged in the battery of the electric vehicle to operate;
A method of operating a V2G-V2B system for managing power by linking V2G and V2B, including a.
16. The method of claim 15,
The surplus amount is an operating method of a V2G-V2B system for managing power by linking V2G and V2B, characterized in that the surplus amount is greater than or equal to the actual charge amount.

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