JP6173068B2 - Power suppression method, power management system, and power management program - Google Patents

Description

  The present invention relates to a power suppression method, a power management system, and a power management program for managing power of a management unit such as a facility or a store.

  In recent years, a system that controls power consumption of a load device and power generated by a power storage device or a power generation device for each management unit such as a facility or a store is known (see Patent Document 1).

  In such a system, since the power is individually managed for each management unit, it is difficult to introduce the management unit in a small scale. For this reason, it has also been proposed that a business operator individually gives control instructions to all management units managed by the business operator.

JP 2005-158020 A

  In power management, there is a case where it is desired to reduce the total power in all management units possessed by an operator by a predetermined amount, such as demand response.

  In this case, it is difficult to assign the power reduction target amount to each management unit in correspondence with the total power reduction target amount in all the management units. This is because the power saving status, work contents, power capacity and facilities, weather, etc. of each management unit are different from each other, and thus the power that can be reduced in each management unit is diverse.

  Accordingly, an object of the present invention made in view of such circumstances is to provide a method, a system, and a program capable of determining an allocation of a target amount of power reduction that can be achieved in each management unit.

In order to solve the above-described problems, the power suppression method according to the first aspect is
A power control method implemented by a power management system,
A first acquisition step of individually acquiring power and acquiring a degree of difficulty in achieving the reduction target amount of power in each of the plurality of management units;
A second acquisition step of acquiring a total power reduction target amount of the plurality of management units;
Wherein the plurality of management units equal properly each achievement difficulty, and the total reduction target of the plurality management unit of each power so as to reach the reduction target amount of power of the entire, each of the plurality of management units and a determining step of determining the allocation of reduction target amount of power,
In the first acquisition step, the achievement difficulty level of each of the management units is obtained based on the presence or absence of a power supply device in each of the plurality of management units .

Moreover, in the power suppression method according to the second aspect, it is preferable that the achievement difficulty level of each of the management units is obtained based on a supply capacity of the power supply device in the management unit having the power supply device.

Further, in the power suppression method according to the third aspect, each of the plurality of management units is based on the number of times that the power reduction target amount determined in the determination step has not been achieved in a predetermined period. It is preferable to find the difficulty of achieving the unit.

In the power suppression method according to the fourth aspect, it is preferable that the difficulty level of achievement of each of the management units is obtained based on the length of time of the power saving work performed in each of the plurality of management units.

  As described above, the solving means of the present invention has been described as a method. However, the present invention can be realized as a system, apparatus, program, or a storage medium that records the program substantially equivalent to these. It should be understood that these are included in the scope of the invention.

For example, a power management system according to a fifth aspect includes a first acquisition unit that acquires a degree of difficulty in achieving a reduction target amount of power in each of a plurality of management units;
A second acquisition unit that acquires a reduction target amount of overall power of the plurality of management units;
Wherein the plurality of management units each achievement difficulty is equal properly, and the total reduction target of the plurality management unit of each power so as to reach the reduction target amount of power of the entire, each of the plurality of management units and a determination unit for determining the allocation of reduction target amount of power,
The first acquisition unit is characterized in that an achievement difficulty level of each of the management units is obtained based on presence or absence of a power supply device in each of the plurality of management units .

In addition, the power management program according to the sixth aspect includes an EMS server,
Means for individually acquiring power, obtaining a degree of difficulty in achieving the reduction target amount of power in each of a plurality of management units;
Means for obtaining an overall power reduction target amount of the plurality of management units;
Wherein the plurality of management units each achievement difficulty is equal properly, and the total reduction target of the plurality management unit of each power so as to reach the reduction target amount of power of the entire, each of the plurality of management units Function as a means to determine the allocation of the target amount of electricity reduction ,
The means for obtaining the achievement difficulty level is characterized in that the achievement difficulty level of each of the management units is obtained based on the presence or absence of a power supply device in each of the plurality of management units .

  According to the power suppression method, the power management system, or the power management program according to the present invention configured as described above, it is possible to determine the allocation of the power reduction target amount that can be achieved in each management unit.

1 is a system configuration diagram showing a schematic configuration of a power management system according to the present invention. It is a block diagram which shows the apparatus which exists in a 1st management unit. It is a functional block diagram of the apparatus which exists in a 1st management unit. It is a functional block diagram of the apparatus which exists in a 2nd management unit. It is a functional block diagram of an EMS server. It is a graph which shows the method of allocating the electric power reduction target amount to each management unit. It is a flowchart explaining the electric power suppression process implemented by this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a system configuration diagram showing a schematic configuration of a power management system according to the present invention. As shown in FIG. 1, the power management system 10 includes an Internet 11, a first management unit 1, a second management unit 2, an EMS server 13, a database 14, and first communication means 15a. . In FIG. 1, both the first management unit 1 and the second management unit 2 are plural, but the number of the first management unit 1 and the second management unit 2 is not particularly limited, and the first management unit 1 It is sufficient that the total number of 1 and second management units 2 is plural.

  The Internet 11 connects the first management unit 1 and the EMS server 13 and communicates signals such as data and control instructions. In the first management unit 1 and the second management unit 2, as will be described later, electrical devices such as load devices, power storage devices, and power generation devices are provided, and the power of these electrical devices can be individually managed. As will be described later, the EMS server 13 acquires various information from the first management unit 1 and transmits information for power control or a control instruction to the first management unit 1. The database 14 stores various data such as demand power in the first management unit 1, sensor measurement values, and achievement difficulty levels in the first management unit 1 and the second management unit 2. These data are used by the EMS server 13 to determine the allocation of the power reduction target amount of the first management unit 1 and the second management unit 2. The first communication unit 15a is, for example, a telephone, a PC, or a FAX, and transmits information to and from the second management unit 2 that does not have the power control device 12 (see FIG. 2) described later. Transmission of information from the first communication unit 15a to the second management unit 2 can be performed by, for example, a user confirming the display device of the EMS server 13 operating the first communication unit 15a.

  Next, the first management unit 1 will be described. As shown in FIG. 2, the first management unit 1 includes a plurality of load devices 20, a power storage device 21, a power generation device 22, a sensor 23, a power meter 24, a demand monitoring device 25, and the power control device 12 described above. Consists of.

  The load device 20 is a device that is driven based on electric power, such as an air conditioner, a lamp, and a refrigerator. The load device 20 can adjust the operation state such as temperature adjustment and illuminance adjustment, and the power consumption of the load device 20 varies due to these adjustments. The load device 20 communicates with the power control apparatus 12 by a standard protocol such as Echonet Lite (registered trademark). The number of load devices 20 is not particularly limited.

  The power storage device 21 is a device that stores electric power and discharges it as necessary. The power generation device 22 is a solar cell, a wind power generation device, a diesel generator, a fuel cell, or the like, and is a device that generates power by being driven. When the power storage device 21 and the power generation device 22 supply power to the load device 20, the power received from the power company can be reduced. The power storage device 21 and / or the power generation device 22 are not necessarily provided in the first management unit 1 or the second management unit 2 described later.

  The sensor 23 is an arbitrary sensor such as a current sensor, a power sensor, a temperature sensor, or an illuminance sensor, for example. The measurement value regarding the power generation amount of 22 is detected. The sensor 23 transmits a measured value to the power control apparatus 12 by a standard protocol such as SEP2.0 and Echonet Lite (registered trademark).

  The wattmeter 24 measures the accumulated power consumption (hereinafter referred to as “demand power”) of the self-managed unit in the demand time period. The demand time period is a reference time used for a contract power agreement between a business operator who operates a management unit or the like and a power company. For example, when the demand time period is 30 minutes and the contract power is 300 kw, the operator is allowed to consume 300 kw of power on average in each demand time period. The power meter 24 resets the demand power at the beginning of the demand time period and measures the demand power from the beginning of the demand time period to the present time.

  The demand monitoring device 25 reads the pulse output from the power meter 24 and outputs the pulse to the power monitoring unit 12 a of the power control device 12.

  The power control device 12 is, for example, an EMS (Energy Management System) Gateway. The power control device 12 acquires a measured value such as power consumption from the sensor 23. In addition, the power control device 12 calculates the difficulty level by counting the number of times that the reduction amount of demand power has not exceeded the reduction target amount described later, for example. In addition, the power control device 12 periodically transmits the acquired measurement value and the calculated achievement difficulty level to the EMS server 13. In addition, the power control apparatus 12 acquires a power reduction target amount or the like of its own management unit from the EMS server 13 by polling. The power control device 12 controls the load device 20, the power storage device 21, and the power generation device 22 existing in the self-management unit based on the power reduction target amount received from the EMS server 13.

  As shown in FIG. 3, the power control device 12 includes a power monitoring unit 12a, an alarm issuing unit 12b, an achievement difficulty level calculating unit 12c, a device control unit 12d, and a power suppression plan planning unit 12e. The power monitoring unit 12a monitors the demand power received from the demand monitoring device 25 and notifies the EMS server 13 and the number of times that the power reduction target amount received by the own power control device 12 has not been achieved. Is counted and stored. The alarm issuing unit 12b determines whether the demand power can achieve the power reduction target amount in the current power situation. When the warning issuing unit 12b determines that there is a possibility that the power reduction target amount cannot be achieved, the warning issuing unit 12b issues a warning to the user of the self-managed unit. The achievement difficulty calculation unit 12c calculates the achievement difficulty in the self-managed unit. The device control unit 12d controls the load device 20, the power storage device 21, and the power generation device 22. Based on the power reduction target amount received from the EMS server 13, the power suppression plan planning unit 12e formulates a control plan for the load device 20 and the like using various algorithms, and resets the power reduction target amount.

  Next, the second management unit 2 will be described. As shown in FIG. 4, another part of the management unit (second management unit) 2 includes a load device 20, a power storage device 21, a power generation device 22, and a second communication unit 15b. The second management unit 2 is defined as a relatively narrow area, for example, an area where the user can move on foot, and the user in the second management unit 2 can operate the load device 20.

  The load device 20, the power storage device 21, and the power generation device 22 are the same as those in the first management unit 1.

  The second communication unit 15b is, for example, a telephone, a PC, or a FAX, and can transmit information with the first communication unit 15a.

  Next, the EMS server 13 will be described. The EMS server 13 receives and stores the measurement value transmitted from the power control device 12. Further, the EMS server 13 determines the allocation of the power reduction target amount of the first management unit 1 and the second management unit 2. As described above, each power control device 12 acquires the determined power reduction target amount of the first management unit 1 by polling. Further, the EMS server 13 can update the achievement difficulty level of the first management unit 1 stored in the database 14 to that received from the power control device 12 of the first management unit 1.

  As shown in FIG. 5, the EMS server 13 includes a power information collection unit 13 a, a power suppression reception unit 13 b, and a power suppression distribution calculation unit 13 c. The power information collection unit 13 a collects the measurement values and achievement difficulty levels of the first management unit 1 and stores them in the database 14. The collection of these data by the power information collection unit 13a is regular, and the stored data is regularly updated. The power suppression receiving unit 13b receives a request for power suppression from the power company, the government, or the owner of the company, together with the overall power reduction target amount. When the power suppression receiving unit 13b receives a request for power suppression, the power suppression distribution calculating unit 13c is configured to determine the first management unit based on the achievement difficulty levels of the first management unit 1 and the second management unit 2. The allocation of the power reduction target amount of the first and second management units 2 is determined.

  Next, the achievement difficulty level in this embodiment will be described.

  Due to the variety of management unit types (factories, stores, offices, etc.), power saving status, work contents, power capacity, scale, weather, etc., even if the same amount of power reduction is set as a target, the target can be achieved. There may be easy management units and difficult management units. Therefore, in this embodiment, for each management unit and each power reduction target amount, the achievement difficulty level is used as an index that objectively represents the difficulty of the management unit achieving the power reduction target amount.

  The initial value of the achievement difficulty level is created in advance in accordance with the type that causes the above-described variation, the area of each site / sale area, the number of employees, the number of visitors, and the like. The created initial value is stored in the database 14. The EMS server 13 updates the stored initial value to the achievement difficulty level calculated based on the power reduction record in the first management unit 1 as described below.

  Each power control device 12 calculates the difficulty level using the power reduction target amount in its own management unit. The power reduction target amount is, for example, a target value of the power reduction amount from the average value of demand power in the self-managed unit when a request for power suppression is not made (normal time).

  When the power control device 12 receives the power reduction target amount from the EMS server 13, the power control device 12 controls the various devices 20 to 22 and gives an alarm to the user in order to achieve the power reduction target amount in its own management unit. Do. Then, when the power suppression request is completed, the power monitoring unit 12a of the power control device 12 determines whether or not the demand power can be reduced more than the reduction target amount in its own management unit.

  For example, the power monitoring unit 12a counts the number of reduction failures with respect to the same reduction target amount from the present to a predetermined period before, and calculates the number as the achievement difficulty level with respect to the reduction target amount.

  The power control apparatus 12 transmits the calculated achievement difficulty level of the self-management unit to the EMS server 13. Thereafter, the EMS server 13 updates the achievement difficulty level of the management unit stored in the database 14. The power control apparatus 12 can also update the achievement difficulty by another method, as will be exemplified below.

  In general, when the power supply capacity of the power storage device 21 and / or the power generation device 22 (these devices are also referred to as “power supply devices”) included in the self-managed unit is large, the unused power supply device is operated. Can easily achieve the power reduction target. Therefore, it is preferable that the power control device 12 obtains the achievement difficulty level in consideration of the supply capacity of the power supply device.

  Further, by performing power saving work (cleaning of an air conditioner filter or the like) in each management unit, it is possible to reduce the amount of power used in the management unit. In other words, it is difficult to further reduce the power consumption in a management unit in which power saving work is sufficiently performed. Therefore, the power control device 12 can determine the difficulty level based on the length of time for power saving work.

  Moreover, the average value (for example, daily unit) of electric power consumption decreases by performing power saving work. That is, it is difficult to further reduce the power usage in the management unit in which the average value of the power usage is reduced. Therefore, the achievement difficulty level may be obtained based on an average value of power consumption or a change in the average value.

  Here, for the second management unit 2 that is not connected to the EMS server 13 or a newly registered management unit or the like, the user of the management unit calculates the achievement difficulty level and transmits it to the EMS server 13. Alternatively, the achievement difficulty calculated in the first management unit 1 having the same initial value may be used.

  Next, a method for determining a reduction target amount to be allocated to the first management unit 1 and the second management unit 2 based on the achievement difficulty will be described. In the following description, it is assumed that there are four first management units having the power control device 12. However, it goes without saying that the configuration and number of management units can be changed as appropriate.

As illustrated in FIG. 6, the achievement difficulty level with respect to the reduction target amounts of the four management units 1 </ b> A to 1 </ b> D is different for each management unit. The power reduction target amounts of the management units 1A to 1D in which the achievement difficulty level is α are Ae [kwh], Be [kwh], Ce [kwh], and De [kwh], respectively. When the achievement difficulty level of each management unit is α, the power reduction target amount S _all of the management units 1A to 1D is Ae + Be + Ce + De [kwh]. The power suppression distribution calculation unit 13c of the EMS server 13 determines α so that the S _all matches the power reduction target amount received by the EMS server 13.

By setting Ae to De at this time as the power reduction target amount of each of the management units 1A to 1D, each of the management units 1A to 1D for achieving the power reduction target amount S _all in the entire management unit 1A to 1D. The achievement difficulty α is equal. Therefore, the burden on the members of each management unit can be made the same.

  Here, in this embodiment, the achievement difficulty level of each management unit is made equal, but it is sufficient that the achievement difficulty level of each management unit is substantially equal. And that the achievement difficulty levels are substantially equal means a state where the achievement difficulty levels can be regarded as equivalent to each other.

  Next, the power suppression process performed by the EMS server 13 will be described with reference to the flowchart of FIG.

  This process starts when the power suppression reception unit 13b of the EMS server 13 receives a power suppression request (demand response) from an electric power company or the like as in step S100. The request for power suppression is requested, for example, to suppress demand power by 1 Mwh in total for all management units.

  In step S101, the power suppression distribution calculation unit 13c of the EMS server 13 extracts a management unit that is a target of power suppression. For example, when a request for power suppression from a power company occurs in a specific area, the power suppression distribution calculation unit 13c extracts a management unit in the specific area. When the management unit is extracted, the process proceeds to step S102.

  In step S102, the power suppression distribution calculation unit 13c acquires from the database 14 data on the difficulty of achievement for each management unit extracted in step S101. In this embodiment, the achievement difficulty level data is read from the database 14 and acquired, but the achievement difficulty level data can also be acquired sequentially from the power control device 12 of each management unit. When the achievement difficulty data for each management unit is acquired, the process proceeds to step S103.

  In step S103, as described above, the power suppression distribution calculation unit 13c determines the allocation of the power reduction target amount of each management unit based on the achievement difficulty level of each management unit. When the allocation of the power reduction target amount for each management unit is determined, the process proceeds to step S104.

  In step S104, the power suppression distribution calculation unit 13c notifies each management unit of the power reduction target amount. For the management unit having the power control apparatus 12 like the first management unit 1 in FIG. 1, the power control apparatus 12 is notified via the Internet. On the other hand, a power reduction target amount can be notified to a management unit that does not have a power control device, such as the second management unit 2 in FIG. 1, using the first communication means 15a such as a telephone. . When the notification of the power reduction target amount is completed, the power suppression process ends.

  According to the power management system configured as described above, it is possible to achieve a predetermined amount of power reduction target amount as the sum of all management units while making the achievement difficulty level of each management unit substantially the same. Therefore, it is possible to assign a power reduction target amount for achieving the requested power suppression to various management units without affecting the operations of each management unit as much as possible.

  Although the present invention has been described based on the drawings and embodiments, it should be noted that those skilled in the art can easily make various variations and / or modifications based on the present disclosure. Therefore, it should be noted that these variations and / or modifications are included in the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 1st management unit 2 2nd management unit 10 Power management system 11 Internet 12 Power control apparatus 13 EMS (Energy Management System) server 14 Database 15a 1st communication means 15b 2nd communication means 20 Load apparatus 21 Power storage apparatus 22 Power Generation Equipment 23 Sensor 24 Wattmeter 25 Demand Monitoring Device

Claims (6)

A power control method implemented by a power management system,
A first acquisition step of individually acquiring power and acquiring a degree of difficulty in achieving the reduction target amount of power in each of the plurality of management units;
A second acquisition step of acquiring a total power reduction target amount of the plurality of management units;
Wherein the plurality of management units equal properly each achievement difficulty, and the total reduction target of the plurality management unit of each power so as to reach the reduction target amount of power of the entire, each of the plurality of management units and a determining step of determining the allocation of reduction target amount of power,
In the first acquisition step, a power suppression method is characterized in that the achievement difficulty level of each of the management units is obtained based on the presence or absence of a power supply device in each of the plurality of management units . The power suppression method according to claim 1, wherein the achievement difficulty level of each of the management units is obtained based on a supply capacity of the power supply device in the management unit having the power supply device. Suppression method.   3. The power suppression method according to claim 1, wherein each of the plurality of management units is based on the number of times that the reduction target amount of power determined in the determination step cannot be achieved in a predetermined period. A method for suppressing power, wherein the achievement difficulty level of the management unit is obtained.   4. The power suppression method according to claim 1, wherein the achievement difficulty level of each of the management units is obtained based on a length of time of power saving work performed in each of the plurality of management units. A method for suppressing power. A first acquisition unit that individually manages power and that acquires a degree of difficulty in achieving the reduction target amount of power in each of a plurality of management units;
A second acquisition unit that acquires a reduction target amount of overall power of the plurality of management units;
Wherein the plurality of management units each achievement difficulty is equal properly, and the total reduction target of the plurality management unit of each power so as to reach the reduction target amount of power of the entire, each of the plurality of management units and a determination unit for determining the allocation of reduction target amount of power,
The first acquisition unit obtains a degree of difficulty in achieving each management unit based on the presence or absence of a power supply device in each of the plurality of management units . EMS server
Means for individually acquiring power, obtaining a degree of difficulty in achieving the reduction target amount of power in each of a plurality of management units;
Means for obtaining an overall power reduction target amount of the plurality of management units;
Wherein the plurality of management units each achievement difficulty is equal properly, and the total reduction target of the plurality management unit of each power so as to reach the reduction target amount of power of the entire, each of the plurality of management units Function as a means to determine the allocation of the target amount of electricity reduction ,
The power management program characterized in that the means for obtaining the achievement difficulty level obtains the achievement difficulty level for each of the management units based on the presence or absence of a power supply device in each of the plurality of management units .

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