CN112424817B

CN112424817B - Power saving support system, remote management device, and power saving support method

Info

Publication number: CN112424817B
Application number: CN201880095548.5A
Authority: CN
Inventors: 中岛义统; 妻鹿利宏; 川野裕希
Original assignee: Mitsubishi Electric Building Solutions Corp
Current assignee: Mitsubishi Electric Building Solutions Corp
Priority date: 2018-08-08
Filing date: 2018-08-08
Publication date: 2024-01-02
Anticipated expiration: 2038-08-08
Also published as: WO2020031306A1; JP6591126B1; CN112424817A; JPWO2020031306A1

Abstract

A target cut-down amount is input to an amount input unit (50). The exchange rate storage unit stores the exchange rate of the incoming currency of the target cut amount and the local currency of the area where the building is installed. An electricity fee system storage unit (74) stores an electricity fee system that is defined between an owner of a building and a supplier who supplies electricity to the building. A target reduction power amount calculation unit (58) obtains a target reduction power amount from a converted target reduction amount obtained by converting the target reduction amount into the amount of local traffic and a power cost system. An output limit content storage unit (78) determines output limit content for any electrical device installed in a building. A control planning unit (60) obtains at least one electrical device and at least one output limit content that satisfy a target reduction power amount, based on the output limit content.

Description

Power saving support system, remote management device, and power saving support method

Technical Field

The present invention relates to a power saving support system, a remote management device, and a power saving support method for supporting power saving in a building (high-rise building) by suppressing power consumption of electrical equipment installed in the building.

Background

For example, in order to control the power consumption of electric devices installed in a building or the like, a power management system (EMS: energy Management System) is used. The power management system provides, for example, a power saving auxiliary service for facilitating reduction of power consumption of a building.

In patent document 1, a distributed management device is connected to a group of devices installed in a building, a store, or the like. Further, a central management device is provided at a remote place apart from them. An operation program for setting the operation state of the device so as to reduce the energy is issued from the central management device to the distributed management device. When the planned value and the actual value based on the operation program are compared, and energy saving is achieved, the cost in this case is calculated.

Patent document 2 discloses a building management system for controlling the operation state of devices installed in a building. The building management system calculates a difference between a current load and a hypothetical load for each device, and calculates a reduction power of the entire building by aggregating the differences.

Patent document 3 discloses a use electric power distribution system including: a used power calculation unit that calculates, for each tenant, a value of used power at the same time and time period as the last year; and a reduction amount calculation unit that allocates, for each tenant, a reduction ratio of the target power to the power used in the same period and time zone of the last year, based on an index value of the number of people or the like. In this system, the reduction amount of each tenant is subtracted from the value of the power used by each tenant, and the value of the target power of each tenant is calculated.

Prior art literature

Patent literature

Patent document 1: japanese patent laid-open No. 2001-306334

Patent document 2: japanese patent application laid-open No. 2015-104154

Patent document 3: japanese patent laid-open publication No. 2014-157614

Disclosure of Invention

Problems to be solved by the invention

However, in the conventional power saving auxiliary service, a power saving countermeasure is formulated based on the electric power [ kW ] or the electric power amount [ kWh ]. On the other hand, in view of cost reduction, owners of buildings such as building owners may focus on reduction of electric charges achieved by the reduction of electric charges compared with electric power consumption [ kW ] or electric power consumption [ kWh ]. Further, when the owners of the buildings have not only the buildings in the home country but also the buildings in the foreign country, there is a desire to evaluate the measures for saving electricity of these buildings equivalently. Accordingly, an object of the present invention is to provide a power saving support system, a remote management device, and a power saving support program capable of equally evaluating a power saving plan of a building at home and abroad on the basis of an amount of money.

Means for solving the problems

The present invention relates to a power saving auxiliary system. The system has a central management device and a remote management device. The central management device can control the operation of a plurality of electrical devices installed in a building and is installed in the building. The remote management device can send control instructions to the central management device from a remote location separate from the building. The remote management device includes an amount input unit, an exchange rate storage unit, a power cost system storage unit, a target reduction power amount calculation unit, an output limit content storage unit, and a control planning unit. The target cut amount is input to the amount input unit. The exchange rate storage unit stores the exchange rate of the incoming currency of the target cut amount and the local currency of the area where the building is installed. The electric power fee system storage unit stores an electric power fee system defined between an owner of a building and a supplier who supplies electric power to the building. The target reduction power amount calculation unit obtains the target reduction power amount from a system of converted target reduction amount and power cost, the system being obtained by converting the target reduction amount into the amount of local currency. The output limit content storage unit determines output limit content for any electrical device installed in a building. The control planning unit obtains at least one electric device and at least one output limit content that satisfy the target reduction power amount, based on the output limit content.

According to the above invention, the control plan corresponding to the target cut power amount based on the local traffic provided with the building is calculated only by inputting the target cut amount. Therefore, for example, control plans for a target reduction amount for buildings in a plurality of countries and regions can be compared based on a single currency.

In the above invention, the remote management device may further include an amount distribution unit. When the electric power fee system is a two-part fee system composed of a fixed fee and a slave fee, the amount distribution unit distributes a target reduction amount obtained by converting the target reduction amount into the amount of local delivery to the reduction amount of the fixed fee amount and the reduction amount of the slave fee amount.

According to the above invention, the reduction amount corresponding to the two-part cost system can be allocated.

In the above invention, the target reduced electric power amount calculation unit may calculate the target reduced electric power amount from a reduction amount of the electric power charge and the electric power charge system.

According to the above invention, the target reduction power amount corresponding to the reduction amount allocated as the slave amount of charge can be obtained.

In the above invention, the fixed fee may be determined based on the maximum power consumption of the main power in the building. In this case, the remote management device may include a target maximum power calculation unit that obtains the target maximum power from the reduction amount of the fixed fee amount and the power fee system. The control planning unit obtains at least one electrical device and at least one output limit content that satisfy a target maximum power and a target reduced power amount.

According to the above invention, when the fixed fee is determined based on the maximum power consumption of the main power, the target maximum power corresponding to the amount of reduction of the fixed fee amount can be obtained. In this way, even when the charging system is different between the amount charge and the fixed charge, the power saving measures can be adopted in balance for both.

Another example of the present invention relates to a remote management device capable of transmitting a control command to a central management device that is installed in a building and is capable of controlling operations of a plurality of electrical devices installed in the building from a remote place separate from the building. The remote management device includes an amount input unit, an exchange rate storage unit, a power cost system storage unit, a target reduction power amount calculation unit, an output limit content storage unit, and a control planning unit. The target cut amount is input to the amount input unit. The exchange rate storage unit stores the exchange rate of the incoming currency of the target cut amount and the local currency of the area where the building is installed. The electric power fee system storage unit stores an electric power fee system defined between an owner of a building and a supplier who supplies electric power to the building. The target reduction power amount calculation unit obtains the target reduction power amount from a system of converted target reduction amount and power cost, the system being obtained by converting the target reduction amount into the amount of local currency. The output limit content storage unit determines output limit content for any electrical device installed in a building. The control planning unit obtains at least one electric device and at least one output limit content that satisfy the target reduction power amount, based on the output limit content.

Further, another example of the present invention relates to a power saving assist program. The program causes a computer to function as a remote management device that can transmit a control command to a central management device that can control the operation of a plurality of electrical devices installed in a building and is installed in the building from a remote location separate from the building. That is, the program causes the computer to function as an amount input means, an exchange rate storage means, a power cost system storage means, a target cut power amount calculation means, an output limit condition storage means, and a control plan means. The target cut amount is input to the amount input unit. The exchange rate storage means stores the exchange rate of the inputted currency of the target cut amount and the local currency, which is the currency of the area where the building is installed. The electric power fee system storage unit stores an electric power fee system defined between an owner of a building and a supplier that supplies electric power to the building. The target amount of electric power cut calculation means obtains a target amount of electric power cut from a system of converted target amount of electric power cut and electric power charge obtained by converting the target amount of electric power cut into the amount of local currency. The output limit content for any electrical equipment provided in the building is determined in the output limit condition storage unit. The control planning unit obtains at least one electric device and at least one output limit content that satisfy the target amount of reduction power, based on the output limit content.

Effects of the invention

According to the present invention, the electricity saving plan of the building at home and abroad can be evaluated equivalently based on the amount of money.

Drawings

Fig. 1 is a diagram illustrating a power saving support system according to the present embodiment.

Fig. 2 is a diagram illustrating functional blocks of the remote management apparatus.

Fig. 3 is a diagram illustrating a storage content of the article information storage section.

Fig. 4 is a diagram illustrating the storage contents of the electric power fee system storage unit.

Fig. 5 is a graph illustrating the consumed power amount per month.

Fig. 6 is a monthly graph illustrating contract power.

Fig. 7 is a daily graph illustrating contract power.

Fig. 8 is an hourly graph illustrating contract power.

Fig. 9 is a diagram illustrating an output restriction list stored in the output restriction content storage section.

Fig. 10 is a graph illustrating an hourly space of equal limitation as an example of the power saving control.

Fig. 11 is a graph for every hour illustrating peak reduction as an example of power saving control.

Fig. 12 is a monthly graph illustrating the equalization restriction as an example of the power saving control.

Fig. 13 is a monthly graph illustrating peak reduction as an example of the power saving control.

Fig. 14 is a flowchart illustrating a power saving plan generation process (amount of power only) of the present embodiment.

Fig. 15 is a flowchart (1/2) illustrating a power saving plan generation process (amount of power and contract power) of the present embodiment.

Fig. 16 is a flowchart (2/2) illustrating a power saving plan generation process (amount of power and contract power) of the present embodiment.

Fig. 17 is a diagram illustrating reduction of contract power.

Detailed Description

Fig. 1 illustrates a power saving support system according to the present embodiment. The power saving auxiliary system illustrated in fig. 1 is configured to include a monitor control system BEMS (Building and Energy Manegement System) provided in an electric device (electric apparatus) such as a building 11 (high-rise building), for example.

The power saving auxiliary system has a central management device 10 and a remote management device 12. The central management device 10 is provided in a building 11, and can control the operation of a plurality of electrical devices 20A to 20C (electrical equipment) provided in the building 11.

The central management device 10 may be, for example, a central monitoring server called B-OWS (BACnet Operator Workstation). The central management device 10 is connected to the sub-controllers 14A, 14B (B-BC) via a bus. The sub-controllers 14A and 14B are connected to respective electrical devices 20A to 20C or respective sensors 22A to 22D as management target devices.

The electric devices 20A to 20C are various devices installed in a building, and are management target devices (control target devices) of the central management apparatus 10. The electrical devices 20A to 20C include, for example, lighting devices, air conditioning devices, elevators, sanitary devices, disaster prevention devices, anti-theft devices, and the like. In the example of fig. 1, the electric device 20A is an illumination device, the electric device 20B is an illumination operation panel, and the electric device 20C is an air conditioner.

The sensor 22A is an illuminance sensor, the sensor 22B is an illumination power meter, the sensor 22C is an air conditioner sensor, and the sensor 22D is an air conditioner power meter. In this way, one electricity meter may be provided for one electrical device 20.

The sensor 22E is a main electric power meter, and is an instrument for measuring electric power consumption (building unit electric power consumption) of the entire building 11, which is mainly the management target building 11, from the electric power company to the central management device 10. The power consumption [ kWh ] or the maximum power consumption [ kW ] of the entire building 11 can be obtained from the main power meter 22E.

The main power meter 22E is set by, for example, an electric power company, and the main power detected by the main power meter 22E is transmitted to the electric power company. The central management apparatus 10 can also monitor the main power transmitted to the electric power company, and thereby can share information of the main power between the electric power company and the building manager.

In order to facilitate viewing the drawings, fig. 1 illustrates a part of the devices such as the sub-controller 14 connected to the lower side of the central management apparatus 10, and various devices may be connected in addition to the illustrated configuration.

The central management apparatus 10 has a function as a client PC that is operated and monitored by an administrator or the like of the building 11, and a function as a server that performs data storage, application processing, and the like. The central management apparatus 10 performs, for example, screen display and setting operations.

The central management device 10 is connected to the remote management device 12 via a gateway device 15 and a communication line 16. The gateway device 15 is, for example, a device that intermediates when a device in the BEMS system communicates with a device outside the BEMS system. The gateway device 15 can transmit information of one party (for example, the central management device 10) to the other party according to a communication protocol of the one party (for example, the remote management device 12), for example, by intermediating between devices having different communication protocols. The communication line 16 is, for example, a dedicated line or a general line between two sites connecting the central management device 10 and the remote management device 12.

The sub-controller 14 mainly assumes control functions. The sub-controller 14 is constituted of, for example, a so-called B-BC (BACnet Building Controller), and manages the fraction data, the scheduling control, and the like. For example, the sub-controller 14 is provided for each of the functional systems (sub-systems) such as an air conditioning system, an illumination system, an elevator system, a sanitary system, and an antitheft system.

The remote management device 12 is provided at a remote place separated from the central management device 10. For example, the remote management apparatus 12 can be connected to a plurality of central management apparatuses 10. For example, the remote management device 12 is provided in a maintenance company (maintenance center) having a building maintenance contract, and the building management device 10 is provided in a building manager (client) having the building maintenance contract.

The remote management device 12 can receive data of machine operation data, power consumption [ kW ] of main power, and power consumption [ kWh ] from each central management device 10. Here, the machine operation data is data detected by a sensor such as the illuminance sensor 22A, and includes various data such as power consumption [ kW ], power consumption [ kWh ], temperature, illuminance, air volume, rotation speed, torque, and set temperature of each electrical device 20.

The power consumption [ kW ] is theoretically an instantaneous value, but in an actual business of power cost calculation, a so-called demand value may be handled as the power consumption [ kW ]. The required value is an average value of 30 minutes of the power consumption [ kW ].

Further, as described later, the remote management device 12 can transmit a control command to the central management device 10. The control command is a command (signal) for controlling the operations of the electrical devices 20A to 20C in the building 11, and the central management device 10 that has received the control command from the remote management device 12 controls the operations of the electrical devices 20A to 20C.

The central management device 10, the remote management device 12, and the sub-controllers 14A, 14B are constituted by computers. For example, as representatively shown in the central management apparatus 10 or the remote management apparatus 12, a CPU26, a memory 28, a Hard Disk Drive (HDD) 30, an input section 32, an output section 34, and an input-output interface 36 are provided.

As described later, the CPU26, the memory 28, and the hard disk drive 30 of the remote management apparatus 12 constitute functional blocks illustrated in fig. 2. The output unit 34 is, for example, a display, and displays, for example, a change in power consumption per building unit. In the power saving plan generation process described later, a control plan for the target reduction amount is displayed. The input unit 32 may be an input device such as a keyboard or a mouse, and is capable of inputting a target reduction amount to be described later. Further, the registration contents of the demand control list can be set and changed by the input to the input unit 32.

The functional blocks of the remote management device 12 are illustrated in fig. 2. As the arithmetic processing unit, the remote management device 12 includes an amount input unit 50, a communication conversion unit 52, an amount distribution unit 54, a target maximum power calculation unit 56, a target reduced power amount calculation unit 58, a control planning unit 60, and an output unit 62. The output unit 62 is connected to the output unit 34 as a display.

The remote management device 12 includes, as storage units, an object information storage unit 70, a distribution ratio storage unit 72, a power cost system storage unit 74, an actual power consumption value storage unit 76, and an output limit content storage unit 78.

A program for executing a power saving plan generation process described later is executed by the remote management device 12 as a computer. Accordingly, the respective resources such as the CPU26, the memory 28, and the hard disk drive 30 of the remote management device 12 are allocated, and the respective functional units illustrated in fig. 2 are configured.

The effects of the respective functional blocks of the remote management device 12 are summarized, and a target reduction amount for the power cost of the predetermined building 11 is input to the amount input unit 50. The target cut amount may be an annual amount or a monthly amount. The currency of the target cut amount may be, for example, a currency provided with the remote management device 12.

The currency conversion unit 52 converts the target cut amount input to the amount input unit 50 into an amount of currency based on the area where the building 11 is installed. In the amount distribution unit 54, when the electric charge is made of two parts of the fixed charge and the sub-charge, the target reduction amount after the local currency conversion is distributed to the reduction amount of the fixed charge and the reduction amount of the sub-charge.

The target maximum power calculation unit 56 obtains target maximum power [ kW ] which is target reduction power corresponding to the reduction amount of the fixed charge amount. The target reduced electric power amount calculation unit 58 obtains a target reduced electric power amount [ kWh ] corresponding to the amount of reduction from the amount of charge.

In order to achieve the target maximum power [ kW ] and the target reduced power amount [ kWh ], the control planning unit 60 generates a control plan that identifies the electric devices to be operation-restricted and the restricted contents thereof. That is, the control planning unit 60 obtains at least one electric device and at least one output limit content that satisfy the target reduction electric power amount from the actual measurement value of the electric power consumption amount and the output limit content of each of the electric devices 20A to 20C provided in the building 11.

The generated control plan is output from the output unit 62. When the manager (building owner, etc.) of the building 11 approves the outputted control plan, an approval instruction is sent to the control plan section 60. Then, the control plan unit 60 transmits the approved control plan to the central management apparatus 10 of the building 11. The central management device 10 controls the operations of the electrical devices 20A to 20C according to a control plan.

The article information storage unit 70 stores information of the building 11 and information of the region where the building 11 is installed. Specifically, as illustrated in fig. 3, the article information storage unit 70 stores information such as a building name, a building manager, an address, a location area, a delivery, an exchange rate, a year and month after completion, a building age, a total area of use, and a number of floors.

As described above, the item information storage unit 70 stores the currency and the exchange rate. The currency represents a currency (local currency) of a region (country) where the building 11 is built, and the exchange rate represents a conversion ratio between the local currency and the currency of the target cut amount input to the amount input unit 50. Instead of the conversion ratio between the local currency and the currency of the target cut amount input to the amount input unit 50, the conversion ratio between the local currency and the currency of the region (country) of the building manager may be used.

Further, since the exchange rate varies with time, it is preferable that the remote management device 12 periodically acquires and updates the exchange rate from the exchange price or the like. Since the exchange rate is stored in the item information storage unit 70 in this way, the item information storage unit 70 includes an exchange rate storage unit in a part thereof.

The distribution ratio storage unit 72 stores a ratio (distribution ratio) of the amount of load of the target reduction amount to the fixed fee amount and the sub-amount fee amount when the electric fee system employs a two-part fee system of the fixed fee and the sub-amount fee. As described later, when a fixed fee is determined from the maximum power consumption [ kW ] and a slave fee is determined from the power consumption [ kWh ], the respective load amounts are distributed (proportionally distributed) in accordance with the distribution ratio stored in the distribution ratio storage unit 72.

For example, the distribution ratio of the distribution ratio storage unit 72 may be arbitrarily changed by an administrator of the building 11 or the like by an input operation of the input unit 32. For example, the distribution ratio may be changed in response to a change in the electric charge system.

The electric power fee system storage unit 74 stores an electric power fee system specified between an administrator of the building 11 and a supplier (electric power company) that supplies electric power to the building 11. For example, as illustrated in fig. 4, the electric power charge system storage unit 74 stores information such as power division of the received electric power, a charge plan, and a contract electric power company.

For example, as a fee schedule, a basic fee, an electric power amount fee, and a renewable energy generation promotion tax, which are fixed fees, are stored in the electric power fee system storage section 74. The amount of electricity charge is obtained by the following equation (1).

Electric power cost=electric power cost unit price×electric power usage ± fuel cost adjustment amount … (1)

Fig. 4 illustrates an electricity amount cost unit price in the above equation (1). In this example, the unit price of the electric power amount is determined by dividing the unit price into 3 stages of a summer weekday, a summer weekday other than summer, and a rest day. The fuel charge adjustment amount is determined based on the price change of the thermal fuel.

In equation (1), the used electric power amount is an electric power amount [ kWh ] of the overall power consumption of the building 11 unit, which is the main electric power of the building 11, and is detected by the main electric power meter 22E. For example, as illustrated in fig. 5, the power consumption amount (the amount of power used) for each month is obtained by the main power meter 22E. The electricity cost per month is obtained from this value.

In the example of fig. 4, the unit price of the electric power amount is determined by the division of the season and the weekday/holiday, but the unit price of the electric power amount can be stored in the electric power fee system storage unit 74 in accordance with the amount of the monthly electric power consumption of the main electric power.

For example, the unit price of the electric power consumption may be changed when the electric power consumption at month is less than 100kWh, when the electric power consumption at month is 100kWh or more and less than 300kWh, and when the electric power consumption at month is 300kWh or more. In this case, for example, the larger the amount of consumed electric power per month, the higher the unit price of electric power amount.

The renewable energy power generation promotion tax is obtained by the following expression (2).

Renewable energy generation promotion tax = renewable energy generation promotion tax unit price x amount of electricity used … (2)

The basic cost as the fixed cost is obtained by the following equation (3).

Basic fee = basic fee unit price x contract power x power ratio … (3)

In the equation (3), as illustrated in fig. 4, the basic cost unit price a [ yen/kW ] is stored in the electric power cost system storage unit 74. Further, the force rate ratio is determined from the ratio of the effective power to the ineffective power measured by the main power meter 22E.

The contract power [ kW ] is determined based on the maximum power consumption [ kW ] within the prescribed period. The maximum power consumption per month is illustrated in fig. 6, for example. In the graph of fig. 6, the horizontal axis shows months, and the vertical axis shows the maximum power consumption per month [ kW ] detected by the main electric power meter 22E.

When the maximum power consumption p_cd0 is detected in a certain month (for example, 7 months) in determining the contract power, the contract power of each month is fixed to p_cd0 even if it is lower than the maximum power consumption p_cd0 in 1 year thereafter.

For example, fig. 7 illustrates the maximum power consumption per day [ kW ] for 7 months, and fig. 8 illustrates the maximum power consumption for a predetermined day (for example, 10 days for 7 months) for 7 months. In fig. 8, a demand value, which is a 30-minute average value of the power consumption as the instantaneous value, is used as the power consumption. As shown in fig. 7, for example, at 15 for only 7 months and 10 days: 00-15: when the power consumption of 30 is p_cd0 and the power consumption at other times is smaller than the maximum power consumption p_cd0, the contract power in 7 months and the following year is also set to p_cd0.

From the viewpoint of power saving, only suppressing the power consumption at a specific date (for example, 15:00 to 15:30 on the day of 7 months and 10 days) can reduce the contract power, and can reduce the power cost during the contract power contract period, that is, within one year.

The electric power fee system is a fee system widely used by electric power companies in japan, and electric power fee systems of electric power companies in other countries and regions can be stored in the electric power fee system storage unit 74.

For example, in china, two-part fee systems consisting of a basic fee and a secondary fee based on the capacity of the motor are used for a large household. If the electric equipment other than the building 11 is replaced with energy-saving electric equipment, the power receiving device capacity is not substantially changed, and therefore, in this case, it is preferable to reduce the amount of electric power [ kWh ] to reduce the cost of the slave. That is, the distribution ratio storage unit 72 may be set to a basic cost: from quantitative cost = 0:100.

in the case of a spear card, for example, the electric power cost is made up of two parts of the basic cost and the secondary cost, but the basic cost varies depending on the amount of consumed electric power for a month as well as the secondary cost. Therefore, in this case, by reducing the amount of electric power, both the secondary cost and the primary cost can be reduced.

The actual measurement value storage unit 76 stores actual measurement values of the main power [ kW ] and the main power amount [ kWh ] of the building 11 in which the central management device 10 connected to the remote management device 12 is installed. For example, the electric power [ kW ] detected by the main electric power meter 22E and the electric power amount [ kWh ] obtained by integrating them are stored in the electric power consumption actual measurement value storage unit 76. For example, the actual power consumption value storage unit 76 stores the power consumption value [ kWh ] of the main power in accordance with fig. 6 (month unit), fig. 7 (single day unit), and fig. 8 (hour unit). Further, the consumed power amount may be obtained by accumulating the demand value of the main power [ kW ] every time the consumed power amount is calculated.

The actual power consumption [ kW ] and the power consumption [ kWh ] of the electric devices 20A to 20C installed in the building 11 are also stored in the power consumption actual measurement value storage unit 76. In synchronization with the time change in the power consumption [ kW ] and the power consumption [ kWh ] of each of the electric devices 20A to 20C, the time change in the operating state (temperature setting, wind amount setting, etc.) of each of the electric devices 20A to 20C may be stored in the power consumption actual measurement value storage unit 76.

The output limit content storage unit 78 stores output limit content for any of the electrical devices 20A to 20C installed in the building 11. The electric devices 20 to be output-restricted may be all electric devices in the building 11, or electric devices having high importance such as an air conditioner of a server room which always requires temperature adjustment may be excluded from the output-restricted objects. The selection of such electrical devices as the output limitation object and the specific limitation contents thereof may be predetermined according to an agreement with the building manager and the operator of the remote management apparatus 12.

Fig. 9 illustrates an output restriction object list for each electrical device 20 stored in the output restriction content storage unit 78. The output limit list illustrated in the figure can determine a plurality of limit levels (DmdLv) based on so-called demand control. As illustrated in the figure, the higher the restriction level, the more the number of electric devices 20 to be subjected to the restriction is increased, and the more the output restriction is strengthened (stricter).

For example, in the limit level DmdLv1 of fig. 9, the output reduction of 25% is set for the air conditioner 1. The specific content of this output reduction control is illustrated in fig. 10 and 11. In fig. 10 and 11, the horizontal axis shows time and the vertical axis shows power consumption [ kW ]. The power consumption [ kW ] may be a required value. The broken line shows an actual measurement value, and the solid line shows a predicted value when the output limitation is applied. The power consumption shown in fig. 10 and 11 may be an actual measurement value (past value) of the electric device (air conditioner 1) in which the output limit is set.

As a specific content of the output limitation, for example, in the case of reducing the power consumption amount for one day, the equal limitation of the output equally in all the time periods illustrated in fig. 10 may be performed. Further, as a specific content of the output limit, peak reduction of the output limit for the period in which the consumed power exceeds the target contract power p_obj illustrated in fig. 11 may also be performed.

Fig. 12 and 13 show control contents of month units of the output reduction control. The specific content of this output reduction control is illustrated in fig. 12 and 13. In fig. 12 and 13, the horizontal axis shows time, and the vertical axis shows the consumed electric power [ kWh ]. The consumption power [ kWh ] may be an integrated value of the demand value. The broken line shows an actual measurement value, and the solid line shows a predicted value when the output limitation is applied. The consumed power amount shown in fig. 12 and 13 may be an actual measurement value (past value) of the electric device (air conditioner 1) in which the output limit is set.

As a specific content of the output limitation, for example, as illustrated in fig. 12, equal limitation of equally limiting the output in all months may be performed. As a specific content of the output limit, peak reduction of the output limit for the month in which the amount of consumed power exceeds the target amount of power wh_obj illustrated in fig. 13 may be performed.

< procedure (1) for generating Power saving plan

Fig. 14 is a flowchart illustrating a power saving plan generation process in the remote management device 12 according to the present embodiment. In this example, a procedure of generating a control plan for achieving power saving by reducing the amount of electric power [ kWh ] is illustrated.

In addition, in the flowchart shown in fig. 14, a control plan for realizing power saving by reducing only the slave amount cost is exemplified. Therefore, the distribution ratio storage unit 72 is configured to store the following fixed fees: from quantitative cost = 0:100[% ] to determine the partition rate.

Referring to fig. 1, 2, and 14, a target reduction amount is input to the amount input unit 50 of the remote management device 12 by an input operation to the input unit 32 of the remote management device 12. The target reduction amount may be, for example, a target reduction amount per year, or a target reduction amount per month. In order to input the target reduction amount for such different periods, for example, an input field for selecting the power saving period (year/month) may be provided in addition to the input field for the target reduction amount on the display as the output unit 34. The power saving period selected in the input field is reflected as a control period of a control plan thereafter.

The currency conversion unit 52 obtains, from the item information storage unit 70, the currency rate of the amount of money input from the item information storage unit 70 and the currency of the area where the building 11 is installed. Further, the currency conversion unit 52 calculates a conversion target reduction amount obtained by converting the target reduction amount input to the amount input unit 50 into the currency of the area where the building 11 is installed, based on the obtained exchange rate (S10).

Since the amount distribution unit 54 has a distribution rate of the slave amount fee of 100% as described above, the converted target reduction amount is directly transmitted to the target reduction amount calculation unit 58 in full. The target reduced power amount calculation unit 58 obtains the power cost system data specified for the building 11 from the power cost system storage unit 74, and obtains the target reduced power amount Δwh_obj from the data and the converted target reduced amount (S12).

For example, as described above, when the slave electricity amount cost is the sum of the electricity amount cost and the renewable energy generation promotion tax, the following expression (4) is obtained from expressions (1) and (2).

Conversion target reduction amount= (electric power amount fee unit price+renewable energy generation promotion tax unit price) ×target reduction amount of electric power ± fuel charge adjustment amount … (4)

The conversion target reduction amount calculated in step S12 is substituted into equation (4), and the target reduction amount Δwh_obj is calculated by substituting the unit price of the electric power amount, the unit price of the renewable energy generation promotion tax, and the fuel charge adjustment amount used in the calculation of the latest electric power charge into equation (4). The obtained target reduction power amount Δwh_obj is sent to the control planning unit 60.

The control planning unit 60 refers to the output limit content storage unit 78, and sets the electric device to be output limit and the control content thereof that satisfy the target reduction electric power amount Δwh_obj. Specifically, the electric device to be the object of output restriction and the control content thereof are selected based on the output restriction list illustrated in fig. 9.

For example, studies are being made from the electric device and the limitation content set to DmdLv1, which have the lowest output limitation level, in other words, are most easily accepted as a countermeasure for power saving. The control planning unit 60 sets the count m of the output restriction level (m=1 to 4) to 1 (S14). Further, the control planning unit 60 extracts a list of the output limit levels dmdlv_m (=1) from the output limit content storage unit 78.

The control planning unit 60 sets the count k of the electrical devices set (registered) in the list of the output limit levels dmdlv_m (=1) to an initial value 1 (S16). Further, based on the restriction content set for the electric device of the number k (=1), the reduction electric power amount Δwh_k [ kWh ] achieved by executing the restriction content of the electric device is calculated (S18).

For example, referring to fig. 9, when the limitation content is output reduction by 25%, the actual measurement value of the power consumption amount of the electric device is reduced by 25%, and the reduced power amount Δwh_k [ kWh ] is calculated. Alternatively, when the amount of reduced power associated with execution of the restricted content is known in advance or the predicted value is already obtained, the amount of reduced power Δwh_k [ kWh ] corresponding to the restricted content is obtained.

The actual measurement value of the power consumption value of each electrical device, which is a calculation reference for reducing the amount of power Δwh_k, may be, for example, the power consumption value of each electrical device under the condition that no output limitation is imposed. Furthermore, it may be excluded from the count k for electrical devices that have imposed certain output restrictions, for example when detecting measured values.

Next, the control planning unit 60 determines whether or not the integrated reduction power amount ΣΔwh_k based on the electrical device selected previously and the limitation content thereof is equal to or greater than the target reduction power amount Δwh_obj (S20). When ΣΔwh_k is equal to or greater than Δwh_obj, the control planning unit 60 generates a list (control plan list) of the electric devices selected in steps S14 to S20 and the limitation contents thereof, and outputs the list to the output unit 62 (S22).

The control plan list is once reviewed by the manager of the remote management device 12 and the manager of the building 11, and the validity of the control content is studied. When it is determined that the content of the control plan list is proper, an instruction to approve the control plan is sent to the control plan unit 60 (see fig. 2), and the control plan unit 60 sends a control instruction corresponding to the control plan to the central management device 10 of the building 11. On the other hand, when it is determined that the contents of the control plan list are not appropriate, the target amount is changed, and the power saving plan generation process is executed again.

Returning to step S20, when ΣΔwh_k < Δwh_obj, the control planning unit 60 determines whether or not the count k of the electrical devices set (registered) in the list of the output limit levels dmdlv_m (=1) is the maximum value k_max (S24). When the count k does not reach the maximum value k_max, the control planning unit 60 increases the count k of the electrical device (S30), and returns the flow to step S18.

When the count k of the electric devices reaches the maximum value k_max in step S24, the control planning unit 60 determines whether or not the count m of the output limit level dmdlv_m is the maximum value m_max (S26). When the count m does not reach m_max, the control planning unit 60 increases the count m (S32), and returns the flow to step S16.

When the count m is increased, ΣΔwh_k accumulated before that time may be reset to 0.

On the other hand, when the count m of the output limit level dmdlv_m reaches the maximum value m_max in step S26, the output limit menu stored in the output limit content storage unit 78 is set to be a target amount of money, and an error message is output to the output unit 62 (S28). For example, a message that the target cut-down amount should be reduced and the power saving plan generation process is performed again is output.

As described above, in the power saving support system according to the present embodiment, the control plan corresponding to the target amount of reduction power based on the local traffic provided with the building 11 is calculated only by inputting the target amount of reduction. Therefore, for example, control plans for a target reduction amount for buildings in a plurality of countries and regions can be compared based on a single currency.

< procedure (2) for generating Power saving plan

Fig. 15 and 16 are flowcharts illustrating a power saving plan generation process in the remote management device 12 according to the present embodiment. The processing described with the same step numbers as the flowchart of fig. 14 is repeated, and therefore, the description thereof is omitted appropriately.

In the flowcharts illustrated in fig. 15 and 16, the target contract power p_obj and the target reduction power amount Δwh_obj are obtained from the target reduction amount, and the electric devices satisfying both and the limitation contents thereof are set.

Referring to fig. 2 and 15, after the target cut amount is converted into the local currency, the amount distribution unit 54 distributes the converted target cut amount to a fixed fee amount (basic fee amount) and a sub fee amount according to the distribution rate stored in the distribution ratio storage unit 72. Further, the target contract power P_obj [ kW ] and the target reduction power amount DeltaWH_obj [ kWh ] are obtained from the allocated target reduction amount and power cost system (S42).

As described above, the target reduction power amount Δwh_obj [ kWh ] can be obtained using equation (4). The target contract power p_obj [ kW ] can be found using the expression (3). Specifically, the basic fee in expression (3) is substituted into the target cut amount (of a fixed fee amount) after the allocation. Further, when the basic fee unit price obtained from the electric power fee system storage unit 74 and the force rate ratio obtained from the main electric power meter 22E are substituted into the equation (3), the target contract electric power p_obj is obtained. For example, as illustrated in fig. 17, the target contract power p_obj is set to a value lower than the contract power p_cd0 among the actually measured values. As described later, the content of the output limit is determined to cut down the power overflowed from the target contract power p_obj shown by hatching in fig. 17.

In steps S14 to S32, similar to fig. 14, the electric device satisfying the target cut-down electric power amount Δwh_obj [ kWh ] and the limitation content thereof are determined.

Further, when it is determined in step S20 that the electric device satisfying the target cut-down electric power amount Δwh_obj [ kWh ] and the limitation content thereof are satisfied, the flow of the processing proceeds to fig. 16, and it is determined whether or not the maximum power consumption (maximum demand value) of the main electric power is within the target contract electric power p_obj (S48).

When the maximum power consumption of the main power falls within the target contract power p_obj, the control planning unit 60 generates a list (control plan list) of the electric devices selected in steps S14 to S20 and the limitation contents thereof, and outputs the list to the output unit 62 (S50). As in the flowchart of fig. 14, this control plan list is reviewed by the manager of the remote management apparatus 12 and the manager of the building 11, and the validity of the control content is studied.

When it is determined that the content of the control plan list is proper, an instruction to approve the control plan is sent to the control plan unit 60 (see fig. 2), and the control plan unit 60 sends a control instruction corresponding to the control plan to the central management device 10 of the building 11. On the other hand, when it is determined that the contents of the control plan list are not appropriate, at least one of the target amount and the allocation ratio is changed, and the power saving plan generation process is executed again.

Returning to step S48, if the predicted maximum power consumption of the main power exceeds the target contract power p_obj, the control planning unit 60 determines whether or not the count k of the electrical devices set (registered) in the list of the output limit levels dmdlv_m is the maximum value k_max (S52). When the count k does not reach the maximum value k_max, the control planning unit 60 increases the count k of the electrical device (S58), and returns the flow to step S64.

In step S46, the control planning unit 60 calculates the reducible power Δp_k [ kW ] based on the output limit content set for the selected electric device. For example, the electric power Δp_k [ kW ] can be reduced by calculating the difference between the electric power consumption of the electric device and the electric power consumption (predicted value) associated with the execution of the output limitation content in the actual measurement value.

Returning to step S52, when the count k of the electrical devices reaches the maximum value k_max, the control plan unit 60 determines whether or not the count m of the output limit level dmdlv_m is the maximum value m_max (S54). When the count m does not reach m_max, the control planning unit 60 increases the count m (S60), and returns the flow to step S44. In step S44, the count k of the electrical device is reset to 1.

In addition, along with this reset, the sum ΣΔwh_k of the amount of power can be reduced to 0. However, since the output limit list is increased in level by one level, the limit is more strict, and the sum ΣΔwh_k of the reducible power amounts becomes equal to or larger than the target reducible power amount Δwh_obj. Therefore, the relationship ΣΔwh_k is maintained.

When the count m of the output limit level dmdlv_m reaches the maximum value m_max in step S54, the output limit menu stored in the output limit content storage unit 78 is set to be a target amount of money which cannot be achieved, and an error message is output to the output unit 62 (S56). For example, a message that the target cut-down amount or the corrected amount allocation rate should be reduced and the power saving plan generation process is performed again is output.

The control plan unit 60 generates a control command based on a control plan approved by a building manager or the like, and transmits the control command to the central management device 10 of the building 11. The central management device 10 controls the operations of the subordinate electric devices 20A to 20C based on the received control command.

When a period (for example, 1 year) specified by the control plan has elapsed, a difference in power cost between before and after the control plan is executed is obtained, and the remote management device 12 determines whether or not the difference reaches the target reduction amount. When the differential amount does not reach the target reduction amount, the output limit content may be adjusted and used for the next control plan generation.

Description of the reference numerals

10: a central management device; 11: building; 12: a remote management device; 14: a sub-controller; 15: a gateway device; 16: a communication line; 20: an electrical device; 22: a sensor; 22E: a backbone power meter; 50: an amount input unit; 52: a currency conversion unit; 54: an amount distribution unit; 56: a target maximum power calculation unit; 58: a target reduction power amount calculation unit; 60: a control planning unit; 62: an output unit; 70: an object information storage unit; 72: a distribution ratio storage unit; 74: a power fee system storage unit; 76: a power consumption actual measurement value storage unit; 78: and an output limit content storage unit.

Claims

1. A power saving auxiliary system, the power saving auxiliary system having:

a central management device capable of controlling the operation of a plurality of electrical devices installed in a building and installed in the building; and

a remote management device capable of sending control instructions to the central management device from a remote location separate from the building, wherein,

the remote management device has:

an amount input unit for inputting a target reduction amount;

a exchange rate storage unit that stores an exchange rate of the input currency of the target cut amount and a local currency, which is a currency of a region where the building is installed;

A power fee system storage unit that stores a power fee system that is specified between an owner of the building and a supplier that supplies power to the building;

an amount distribution unit that distributes a target reduction amount obtained by converting the target reduction amount into the amount of the local commodity to a reduction amount corresponding to a fixed fee of the electric power fee system and a reduction amount corresponding to a slave fee;

a target maximum power calculation unit that obtains a target maximum power that is a target reduction power corresponding to a reduction amount corresponding to the fixed fee;

a target reduced power amount calculation unit that obtains a target reduced power amount corresponding to the reduced amount corresponding to the slave charge;

an output limit content storage unit that identifies output limit content for any of the electrical devices installed in the building, the output limit content being a percentage reduction in power consumption or a power consumption amount of the electrical device;

a control planning unit that obtains at least one of the electrical devices and at least one of the output limit contents that satisfy the target maximum power and the target reduced power amount, based on the output limit contents; and

And an input unit configured to change a distribution ratio of the conversion target reduction amount to the reduction amount corresponding to the fixed fee and the reduction amount corresponding to the slave fee.

2. The power saving auxiliary system according to claim 1, wherein,

the target reduced power amount calculation unit obtains the target reduced power amount from the reduced amount corresponding to the slave amount charge and the power charge system.

3. The power saving auxiliary system according to claim 2, wherein,

the fixed fee is determined based on a maximum power consumption of backbone power in the building,

the remote management device includes a target maximum power calculation unit that obtains a target maximum power from the reduction amount corresponding to the fixed fee and the power fee system,

the control planning unit obtains at least one of the electrical devices and at least one of the output restrictions that satisfy the target maximum power and the target reduced power amount.

4. A remote management apparatus capable of transmitting a control command to a central management apparatus capable of controlling operations of a plurality of electrical devices installed in a building from a remote place separate from the building, the remote management apparatus comprising:

An amount input unit for inputting a target reduction amount;

5. A power saving support method that causes a computer to function as a remote management device that can transmit a control instruction to a central management device that can control operations of a plurality of electrical devices provided in a building and that is provided in the building from a remote place separate from the building, wherein the power saving support method causes the computer to function as:

an amount input unit that inputs a target cut amount;

exchange rate storage means for storing an exchange rate of the inputted currency of the target cut amount and a local currency, which is a currency of a region where the building is installed;

an electric power fee system storage unit that stores an electric power fee system determined between an owner of the building and a supplier that supplies electric power to the building;

An amount distribution unit that distributes a target reduction amount obtained by converting the target reduction amount into the amount of the local currency to a reduction amount corresponding to a fixed fee of the electric power fee system and a reduction amount corresponding to a slave fee;

a target reduced power amount calculation means for calculating a target reduced power amount corresponding to the reduced amount corresponding to the slave charge;

an output limit content storage unit that determines output limit content for any of the electrical devices provided in the building, the output limit content being a reduction percentage of power consumption or a power consumption amount of the electrical device;