KR20200115027A - Energy demand management control method and energy demand management control apparatus - Google Patents

Abstract

Disclosed are an energy demand management control method and an energy demand management control apparatus. The energy demand management control method comprises the steps of: collecting energy supply order information of a consumer; determining an energy supply time point, at which energy consumption occurs, based on the collected energy supply order information and predetermined condition related to power grid stabilization; determining an energy supply unit price corresponding to the energy supply time point, based on the predetermined condition; and supplying energy based on the determined energy supply time point and the energy supply unit price. The present invention can contribute to securing stability against fluctuations in supply of small power grids.

Description

Energy demand management control method and energy demand management control device {ENERGY DEMAND MANAGEMENT CONTROL METHOD AND ENERGY DEMAND MANAGEMENT CONTROL APPARATUS}

The following embodiments relate to an energy demand management control method and an energy demand management control device.

The microgrid is a power supply network that is independent from the existing power grid and is capable of self-sufficient power supply and demand in a small area. It consists of a variety of renewable energy and energy storage, and is composed of a system or device that manages it.

The microgrid can be combined with more than one microgrid, and in this case, a system for managing the multi-microgrid is required. The multi-microgrid environment can support energy services more efficiently than the energy services provided by a single microgrid environment through collaboration between microgrids.

According to the existing demand response mechanism, in order to stabilize the power supply and demand of the power grid, the power company can request participation in the demand response for load resources in the microgrid. The microgrid management device can fulfill the demand response target amount requested by the power company by reducing the power of the load resource in the microgrid.

If sufficient savings as desired by the supply side are not obtained, sufficient savings can be secured by introducing a differential rate system or by suppressing or blocking the load on the demand side. However, the method of suppressing the load or forcibly blocking it has a limitation in that it is a method of removing the consumer's selection means.

An energy demand management control method according to an embodiment includes the steps of collecting energy supply order information of a consumer; Determining an energy supply timing at which energy consumption occurs based on the collected energy supply order information and a predetermined condition related to power grid stabilization; Determining an energy supply unit price corresponding to the energy supply time point based on the predetermined condition; And supplying energy based on the determined energy supply time and the energy supply unit price.

The collected energy supply order information may include at least one of a charging start point, a charge end point, and an energy capacity required for charging.

The predetermined condition related to the stabilization of the power grid may include a condition related to maintaining a balance between the supply and demand of electric power.

An energy demand management control device according to an embodiment includes: a collection unit for collecting energy supply order information of a consumer; An energy supply timing determining unit determining an energy supply timing at which energy consumption occurs based on the collected energy supply order information and a predetermined condition related to stabilization of the power grid; An energy supply unit price determination unit determining an energy supply unit price corresponding to the energy supply time point based on the predetermined condition; And an energy supply unit that supplies energy based on the determined energy supply time and the energy supply unit price.

According to an embodiment, it is possible to provide an order-based selective scheduling technology, which is a new demand management method in which options of consumers and suppliers of a demand side are expanded based on a differential rate plan method and a demand side load suppression method.

According to an embodiment, it is possible to contribute to securing stability against supply fluctuations of a small power grid by increasing the demand management effect through an order-based selective scheduling method in which the option of participants is expanded through cooperation between the demand side and the supply side.

1 is a diagram showing an overview of an energy demand management control method according to an embodiment.
2 is a flowchart illustrating an energy demand management control method according to an embodiment.
3 is a flowchart illustrating an energy demand management control method according to another embodiment.
4 is a flowchart illustrating an energy demand management control method according to another embodiment.
5A is a diagram for explaining an order-based continuous charging according to an embodiment.
5B is a diagram for explaining order-based discontinuous charging according to an embodiment.
6 is a diagram showing the configuration of an energy demand management control device according to an embodiment.

Hereinafter, exemplary embodiments will be described in detail with reference to the accompanying drawings. However, since various changes may be made to the embodiments, the scope of the rights of the patent application is not limited or limited by these embodiments. It should be understood that all changes, equivalents, or substitutes to the embodiments are included in the scope of the rights.

The terms used in the examples are used for illustrative purposes only and should not be interpreted as limiting. Singular expressions include plural expressions unless the context clearly indicates otherwise. In the present specification, terms such as "comprise" or "have" are intended to designate the presence of features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, but one or more other features. It is to be understood that the presence or addition of elements or numbers, steps, actions, components, parts, or combinations thereof, does not preclude in advance.

Terms such as first or second may be used to describe various components, but the components should not be limited by terms. The terms are only for the purpose of distinguishing one component from other components, for example, without departing from the scope of rights according to the concept of the embodiment, the first component may be named as the second component, and similarly The second component may also be referred to as a first component.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the embodiment belongs. Terms as defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and should not be interpreted as an ideal or excessively formal meaning unless explicitly defined in this application. Does not.

In addition, in the description with reference to the accompanying drawings, the same reference numerals are assigned to the same components regardless of the reference numerals, and redundant descriptions thereof will be omitted. In describing the embodiments, when it is determined that a detailed description of related known technologies may unnecessarily obscure the subject matter of the embodiments, the detailed description thereof will be omitted.

In this specification, the energy demand management control device is an order-based system that expands the options of energy consumers and energy providers by combining the advantages of the differential rate method and the demand-side load suppression method in order to stabilize the energy balance perspective in energy demand and supply. You can perform a demand side management method that adds an optional scheduling method. The energy demand management control device may provide an energy demand management control technology in which the option of participants is expanded based on a negotiation between an energy demanding side and an energy supplying side. In the present specification,'consumer' may correspond to an energy consumer, and'supplier' may correspond to an energy supplier.

The energy demand management control device can provide a stabilization technology in terms of energy balance in energy demand and supply. The energy demand management control device may particularly provide a technology for stabilizing power supply in a small power grid such as a micro grid. Microgrid can refer to a power grid that provides power based on small independent distributed power supplies. The microgrid can supply and store power independently to supply and receive power stably, and can buy and sell surplus power or connect it with existing power systems.

If demand management in connection with fluctuations in energy supply is strengthened to stabilize the power grid, supply costs that the supply side will bear can be reduced. For example, if each factory and building collects and manages the reductions that can reduce consumption, it can have the effect of maintaining a balance without running additional generators. It may also be referred to as a'minus generator' because it can cause an effect equivalent to a generator. Demand response resources can be utilized as one of the means of implementation for demand management.

Terms related to demand described in this specification may be summarized as follows. Demand management may refer to a plan or activity in which the energy supply side rationally controls and adjusts the type of electricity use on the energy demand side. Demand management methods may include strategic consumption savings and load management. Demand Response (DR) may mean that the consumer changes usage to meet the current demand for electricity.

1 is a diagram showing an overview of an energy demand management control method according to an embodiment.

Demand management means may include a demand management method that promotes strategic consumption savings, a differential rate system for each season and time for load management, and a method of suppressing or blocking demand-side load. Demand management methods that promote strategic consumption savings may include, for example, efficiency improvement and incentive systems for electric equipment.

Referring to FIG. 1, the energy demand management control method is based on the conventional demand management means, and the differential rate method is to reduce power consumption by the consumer through the implementation of the differential rate system by season and time period, or to avoid the use of power at a specific time. It is to induce a usage pattern and maintain a balance between power supply capacity and consumption within a wide time range. If sufficient savings desired by the supply side are not obtained, a reduction in power consumption can be induced through a method of suppressing or cutting off the load on the demand side, which is a method of manually reducing and blocking consumers.

As a demand management method that promotes strategic consumption savings, energy consumption is reduced by improving the efficiency of electrical equipment, and it may not be dynamic control. The differential rate method may lead to a state of inducing an effect of reducing electricity consumption when the unit price of electric energy supply is high, or a state of reducing power consumption by replacing an energy source in the case of a dual energy-capable consumption device. The differential rate plan can consider a real-time rate plan one day before, an hour before, or in a shorter unit if it is possible to quickly transfer rate information through communication. Through this real-time differential rate plan (RTP), it is possible to induce voluntary changes in consumption patterns of consumers who want to save costs.

As a method of suppressing or blocking the demand-side load, for example, the demand-side may command a pre-promised peak reduction, or automatically command the reduction through a direct connection of a communication line. The DR result through the peak reduction command may appear after the preparation period for about 1 hour, whereas the direct control command through the communication line is sometimes called Fast-DR because the reduction result can be obtained quickly. If more reductions are required than such measures, strong blocking methods can also be considered.

In addition to the demand management means described here, another demand management method may be used in parallel to achieve small-scale power grid stabilization. The energy demand management control method may include a'order-based selective scheduling method' in which participants' options are expanded.

The order-based selective scheduling method may be a method of adjusting a supply timing through a reasonable optimum price negotiation at the supply point through coordination between a consumer and a supply side starting with a consumer's order.

The order-based selective scheduling method can take advantage of the fact that the energy supply unit price increases when supply shortage is expected, and the energy supply unit price when supply is expected to be sufficient and demand is expected to be small. If the power consumption on the demand side does not decrease even when the energy supply unit price is high, the supply side can further increase the energy supply unit price, leading to a reduction in consumption, and inducing a balance between supply and demand.

After inducing the balance of power demand and supply through the unit price of energy supply, if the demand-side load suppression or cutoff method is used, the supply side can induce a more effective balance of supply and demand while expanding the choice of consumers. The order-based selective scheduling method requires energy consumption and production to be predicted in order to effectively reserve a consumption order.

In another embodiment, through charging and discharging control using an energy storage system (ESS), it may be performed in parallel as a means of quickly obtaining a state of change in demand and supply. Fine prediction errors can be compensated for through the energy storage device.

2 is a flowchart illustrating an energy demand management control method according to an embodiment.

Based on the energy demand management control method to which the order-based selective scheduling method is applied, in step 210, the energy demand management control device of the supply side may collect energy supply order information of the consumer. The consumer's energy supply order information can serve as an order for energy. The consumer's energy supply order information may include at least one of, for example, information on a time point at which energy is desired to start charging, information on a time point at which energy is desired to end charging, and information on the required energy capacity.

The energy demand management control device may determine an energy supply timing at which energy consumption occurs based on the energy supply order information collected in step 220 and a predetermined condition related to power grid stabilization. Here, the predetermined conditions related to the stabilization of the power grid may include conditions advantageous for stabilization operation.

The energy demand management control device may determine an energy supply unit price corresponding to the energy supply time point based on a predetermined condition in step 230. Here, step 220 and step 230 may be performed in parallel, or step 230 may be performed first and then step 220 may be performed.

In step 240, the energy demand management control device may supply energy to the consumer based on the determined energy supply time and energy supply unit price.

3 is a flowchart illustrating an energy demand management control method according to another embodiment.

Referring to FIG. 3, if a demand for energy occurs at the demand side, the demand side may transmit energy supply order information to the energy demand management control device. In step 310, the energy demand management control device may collect energy supply order information from the consumer on the demand side. The energy supply order information may include supply start time and end time, and required energy capacity. The required energy capacity may be indicated in kWh, and the time may be specified in units of 1 hour or minutes, or seconds.

If the energy stabilization range at the expected time point of energy supply is secured in step 320, the energy demand management control device may supply energy to the demand side at an hourly basis in step 370. However, if the energy stabilization range at the time when energy is expected to be supplied has not been secured, the energy demand management control device may determine the energy supply unit price at the time at which the energy is expected to be supplied. The energy demand management control device may determine a supply timing based on a supply unit price. When the supply timing adjustment fails, the energy demand management control device may determine whether the number of adjustments has been exceeded or whether the adjustment procedure has been abandoned in step 340. If the number of adjustments has not been exceeded, and the demand side has not abandoned the adjustment procedure, the energy demand management control device may repeat the cycle of adjusting the supply timing through supply unit price adjustment. As the adjustment process is repeated, the energy supply unit price suggested by the supply side rises or falls, and the supply timing can be determined through negotiations between the supply side and the demand side.

If the supply timing is adjusted in step 350, and the consumer of the demand side agrees on the supply unit price and the supply timing, the energy demand management control device in step 360 provides an energy supply schedule based on the adjusted unit price and timing. Adjustment can be confirmed.

4 is a flowchart illustrating an energy demand management control method according to another embodiment.

When a demand for energy occurs on the demand side, the energy demand management control device may predict the energy consumption and supply amount of the demand side in step 410. In step 420, the energy demand management control device may determine a standard unit price of energy supply every hour based on the prediction result of the energy consumption and supply. When the energy demand management control device receives an energy supply order from the demand side in step 430, it is possible to secure an energy stability range at the time of supply corresponding to the energy supply order received in step 440. In this case, the energy demand management control device may supply energy at an energy-based unit price every hour in step 490.

On the other hand, if the energy stability range is not secured in step 440, the energy demand management control device may present an adjustment plan for the energy supply condition to the demand side in step 450.

If the number of adjustments for the adjustment proposal is exceeded or the adjustment proposal is rejected in step 460, the energy demand management control apparatus may supply energy at an energy-based unit price every hour in step 490. If the number of adjustments to the correction is not exceeded in step 460 and the adjustment proposal is not rejected, if the energy demand management control device has received the consumer's consent in step 470, the energy demand management control device is performed in step 480 Can confirm adjustments to the energy supply schedule.

The adjustment of the energy supply condition may include at least one of a start point, an end point, a capacity of energy, a load type of energy, and a reference unit price for each supply time. When the adjustment of the energy supply condition is confirmed, it may not be subject to adjustment if the energy is a real-time consumption type, or if the capacity of energy that can be charged from the supply side is larger than the ordered capacity of energy in the section to be supplied with energy.

However, if the energy usage load type is a cumulative charge type, and the ordered capacity of energy is larger than the capacity of energy that can be charged at the supply side, the energy demand management control device may have to determine the energy supply condition and an adjustment plan. Here, the energy supply condition and the adjustment plan may include at least one of a time point, capacity, and promotion price at which energy is supplied. The energy demand management control device can present the determined adjustment proposal to the demand side.

5A is a diagram for explaining an order-based continuous charging according to an embodiment. Also, FIG. 5B is a diagram for explaining order-based discontinuous charging according to an exemplary embodiment.

In charging the required energy capacity in the section between the charging start point 530 and the charge end point 560, the supply side proposes a low cost at the point when the power supply margin occurs, and supplies energy at the point when the power supply margin occurs. Can induce The benefits of these two sides can lead to coordination through cooperation between the supply side and the demand side.

If the length of the blank time between the charging start point (or consumption start point) 530 and the charge end point (or consumption end point) 560 which is the energy order section is more than the threshold value, the energy demand management control device is charged The execution start point (or the execution point at which full-scale energy consumption occurs) 540 may be adjusted. The energy demand management control device may cooperate with the demand side for stabilization of energy supply through adjustment of the charging execution start point 540.

Referring to FIG. 5A, the energy demand management control device may wait 520 for energy charging to supply energy to the demand side after the time 510 when energy supply order information, which may also be referred to as an order, is submitted. . The energy demand management control device may start charging at a time point 530 based on the order form, and start charging execution at a time point 540. The energy demand management control device may complete the execution of charging at a time point 550, and may end charging based on the order form at a time point 560. The energy demand management control device may finish waiting for charging at a time point 570 after completing charging. Here, the order form may include at least one of a charging start point 530, a charge end point 560, and an energy capacity required for charging.

As the interval between the charging start point 530 of the order form and the charge completion point 560 of the order form increases, the spare time may be longer than the time required to accumulate and secure energy required by the demand side. The longer the spare time, the greater the selection range to adjust the charging execution start point 540 in which energy consumption occurs due to charging. At this time, the supply side may adjust the favorable point for stabilization operation to the charging execution start point 540, and the cost of the cooperation may be charged to the demand side.

Execution of charging may be performed continuously until the charging end point 560, or may be performed discontinuously as shown in reference numerals 541 to 543. Continuous charging or discontinuous charging can be performed within a range that satisfies the customer's order form. Through this, consumers can be guaranteed the consumer's right to choose.

As an example of applying the order-based selective scheduling method, an example of charging an electric vehicle may be given. In a small power grid such as a microgrid, when a power supply line is connected to charge an electric vehicle, a selective scheduling method can be applied to this method to improve the method of starting charging immediately from the point of connection to the grid.

The energy demand management control device may receive energy supply order information (order document) from a consumer when it is connected to the grid. The order form may include at least one of a charging start point 530, a charge end point 560, and an energy capacity required for charging. In terms of power grid stabilization, the supply side can review the conditions corresponding to the timing and cost and present it to the consumer. If favorable conditions for supply operation are secured to balance supply and demand, the cost required for energy supply can be reduced. If power supply costs are reduced, consumers can also benefit from low energy supply costs. If the consumer agrees to the adjusted energy supply unit price, adjustments to the energy supply schedule can be confirmed.

In the case of a consumer having a consumption pattern such as charging an electric vehicle, a charging period for securing the energy required by the consumer can be sufficiently specified, and thus it may be advantageous to apply the order-based selective scheduling method presented in the present specification.

As described above, the embodiments can increase the demand management effect through an order-based selective scheduling method in which the option of participants is expanded through cooperation between the demand and the supply side, and contribute to securing stability against supply fluctuations in a small power grid.

6 is a diagram showing the configuration of an energy demand management control device according to an embodiment.

Referring to FIG. 6, the energy demand management control apparatus 600 may include a collection unit 610, an energy supply timing determination unit 620, an energy supply unit 630, and an energy supply unit price determination unit 640. Here, the energy demand management control device 600 may correspond to the energy demand management control device described in the present specification.

The collection unit 610 may collect information on a consumer's energy supply order or an order for energy supply. The energy supply timing determination unit 620 may determine an energy supply timing advantageous for stabilization of the power grid based on the energy supply order information. The energy supply timing determination unit 620 may determine an energy supply timing at which energy consumption occurs based on the collected energy supply order information and a predetermined condition related to power grid stabilization.

The energy supply unit price determination unit 640 may determine an energy supply unit price capable of inducing a consumer to receive energy at a time of supplying energy advantageous for stabilization of the power grid. The energy supply unit price determination unit 640 may determine an energy supply unit price corresponding to an energy supply time point based on a predetermined condition. The energy supply unit 630 may supply energy based on the determined energy supply time and energy supply unit price. The energy supply unit 630 may supply energy to the consumer when the consumer agrees on the energy supply timing and energy supply unit price determined through the energy supply timing determination unit 620 and the energy supply unit price determination unit 640.

The method according to the embodiment may be implemented in the form of program instructions that can be executed through various computer means and recorded in a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, and the like alone or in combination. The program instructions recorded on the medium may be specially designed and configured for the embodiment, or may be known and usable to those skilled in computer software. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tapes, optical media such as CD-ROMs and DVDs, and magnetic media such as floptical disks. -A hardware device specially configured to store and execute program instructions such as magneto-optical media, and ROM, RAM, flash memory, and the like. Examples of the program instructions include not only machine language codes such as those produced by a compiler, but also high-level language codes that can be executed by a computer using an interpreter or the like. The hardware device described above may be configured to operate as one or more software modules to perform the operation of the embodiment, and vice versa.

The software may include a computer program, code, instructions, or a combination of one or more of these, configuring the processing unit to behave as desired or processed independently or collectively. You can command the device. Software and/or data may be interpreted by a processing device or to provide instructions or data to a processing device, of any type of machine, component, physical device, virtual equipment, computer storage medium or device. , Or may be permanently or temporarily embodyed in a transmitted signal wave. The software may be distributed over networked computer systems and stored or executed in a distributed manner. Software and data may be stored on one or more computer-readable recording media.

As described above, although the embodiments have been described by the limited drawings, a person of ordinary skill in the art can apply various technical modifications and variations based on the above. For example, the described techniques are performed in a different order from the described method, and/or components such as a system, structure, device, circuit, etc. described are combined or combined in a form different from the described method, or other components Alternatively, even if substituted or substituted by an equivalent, an appropriate result can be achieved.

Therefore, other implementations, other embodiments and claims and equivalents fall within the scope of the following claims.

600: energy demand management control device
610: collection unit
620: energy supply point determination unit
630: energy supply
640: energy supply unit price determination unit

Claims (1)

In the energy demand management control method,
Collecting consumer energy supply order information;
Determining an energy supply timing at which energy consumption occurs based on the collected energy supply order information and a predetermined condition related to power grid stabilization;
Determining an energy supply unit price corresponding to the energy supply time point based on the predetermined condition; And
Supplying energy based on the determined energy supply time and the energy supply unit price
Containing,
Energy demand management control method.

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