JP6794588B2 - Building management system - Google Patents

Description

The present invention relates to a building management system that controls the operation of electrical equipment installed in a building such as a building (high-rise building) and also performs maintenance management of equipment including the electrical equipment installed in the building.

For example, a power management system (EMS, Energy Management System) is used to control the power consumption of an electric device installed in a building such as a building. The power management system provides, for example, a power saving support service for promoting reduction of power consumption of a building.

In Patent Document 1, a distributed management device is connected to a group of equipment installed in a building, a store, or the like. In addition, a central management device will be installed in a remote location away from these. The central management device operates and controls the equipment installed in buildings and the like. The central management device is installed in a company that provides so-called facility services such as building equipment and maintenance.

An operation program in which the operation status of the equipment is set so as to reduce the amount of energy is distributed from the central management device to the distributed management device. The planned value based on the operation program and the actual value are compared to determine whether or not energy saving has been achieved.

In addition, customers such as building owners pay the standard amount contracted with the facility service company in advance as the electricity charge. The difference between this standard amount and the electricity charge reduced by energy saving is the profit of the facility service company. Further, in Patent Document 1, some percentage of the profit is used for the maintenance and management of the customer's building.

Japanese Unexamined Patent Publication No. 2001-306134

By the way, if the amount of reduction in electricity charges does not reach the planned value in advance, the profit of the facility service company will also decrease, and the cost (maintenance points) devoted to the maintenance of the building using this will also decrease. Become. If the accuracy of the energy-saving service is low, such as when the maintenance points are low and the amount of reduction in electricity charges does not reach the planned value in advance, the facility service contract may be terminated by the customer. Therefore, an object of the present invention is to provide a power saving support system, a remote management device, and a power saving support program that can compensate the accuracy of the energy saving service and provide an incentive for the continuation of the maintenance contract to the customer.

The present invention relates to a building management device capable of controlling the operation of a plurality of electric devices installed in a building. The device includes an amount input unit, a control planning unit, a maintenance point calculation unit, and a first penalty point calculation unit. The target reduction amount is input to the amount input unit. The control planning unit generates a power saving plan in which the electric equipment and its output limitation contents are defined according to the target reduction amount. The maintenance point calculation unit calculates maintenance points to assist the cost burden of maintenance management for the building based on the difference between the power charge in the execution period of the power saving plan and the power charge in the reference period in which the power saving plan is not executed. When the difference does not reach the target reduction amount, the first penalty point calculation unit calculates the first penalty point that assists the cost burden of maintenance management according to the amount not reached.

According to the above invention, if the target reduction amount is not reached, the first penalty point is generated by compensating (compensating) for the target reduction amount. Since the first penalty point can be used as an auxiliary point for the cost burden of maintenance management, the customer is provided with an incentive to continue the maintenance contract.

Further, in the above invention, when the power charge during the execution period of the power saving plan exceeds the power charge during the reference period, the second penalty point for calculating the second penalty point for assisting the cost burden of maintenance management based on the excess amount is calculated. A calculation unit may be provided.

According to the above invention, the second penalty point provides the customer with an incentive to continue the maintenance contract even if the power saving effect is not obtained as a result.

Further, in the above invention, the first penalty point calculation unit may calculate the first penalty point by multiplying the unachieved amount by the first conversion rate. Further, the second penalty point calculation unit may calculate the second penalty point by multiplying the excess amount by the second conversion rate higher than the first conversion rate.

According to the above invention, the conversion rate of the second penalty point obtained when the power saving effect is not obtained is set higher than the conversion rate of the first penalty point, so that the customer can be satisfied. it can.

According to the present invention, it is possible to compensate the accuracy of the energy saving service and provide the customer with an incentive to continue the maintenance contract.

It is a figure which illustrates the building management system which concerns on this embodiment. It is a figure which illustrates the functional block of the power saving plan creation part of a remote management device. It is a figure which illustrates the storage content of the property information storage part. It is a figure which illustrates the storage contents of the electric power charge system storage part. It is a graph which exemplifies the monthly power consumption. It is a monthly graph explaining the contract power. It is a daily graph explaining the contract power. It is an hourly graph explaining the contract power. It is a figure which illustrates the output limit list stored in the output limit content storage part. It is a time-based graph explaining the equality limit which is an example of power saving control. It is a time-based graph explaining peak cut which is an example of power saving control. It is a monthly graph explaining the equality limit which is an example of power saving control. It is a monthly graph explaining peak cut which is an example of power saving control. It is a flowchart which illustrates the power saving plan creation process (electric energy only) which concerns on this embodiment. It is a flowchart (1/2) which illustrates the power saving plan making process (electric energy and contract power) which concerns on this embodiment. It is a flowchart (2/2) which illustrates the power saving plan making process (electric energy and contract power) which concerns on this embodiment. It is a figure explaining the reduction of contract power. It is a figure which illustrates the functional block of the power saving plan evaluation part of the remote management device which concerns on this embodiment. It is a figure explaining the calculation of the success fee and maintenance point. It is a figure explaining the calculation of a success fee, a maintenance point and a first penalty point. It is a figure explaining the calculation of the 1st and 2nd penalty points. It is a flowchart which illustrates the power saving plan evaluation process which concerns on this embodiment.

FIG. 1 illustrates a building management system according to this embodiment. The building management system illustrated in FIG. 1 includes, for example, a BEMS (Building and Energy Management System) which is a monitoring and control system for electrical equipment (electrical equipment) installed in a building 11 (high-rise building) or the like. ..

The building management system includes a central management device 10 and a remote management device 12 (building management device). The central management device 10 is installed in the building 11 and can control the operation of a plurality of electric devices 20A to 20C (electrical equipment) installed 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 and 14B (B-BC) via a bus. The sub-controllers 14A and 14B are connected to the electric devices 20A to 20C and various sensors 22A to 22D, which are managed devices.

The electric devices 20A to 20C are various facilities and devices installed in the building, and are managed devices (controlled devices) of the central management device 10. The electric devices 20A to 20C include, for example, lighting devices, air conditioning devices, elevators, sanitary devices, disaster prevention devices, crime prevention devices, and the like. In the example of FIG. 1, the electric device 20A is a lighting device, the electric device 20B is a lighting operation panel, and the electric device 20C is an air conditioner.

Further, the sensor 22A is an illuminance sensor, the sensor 22B is an illumination watt-hour meter, the 22C is an air conditioner sensor, and the sensor 22D is an air conditioner watt-hour meter. In this way, one power meter may be provided for one electric device 20.

Further, the sensor 22E is a main power meter, that is, a meter that measures the power consumption (power consumption per building) of the entire building 11 transmitted from the electric power company to the building 11 managed by the central management device 10. From the main power meter 22E, the power consumption [kWh] and the maximum power consumption [kW] of the entire building 11 can be obtained.

The main power meter 22E is installed 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. By making it possible for the central management device 10 to monitor the main power transmitted to the electric power company, the information on the main power can be shared between the electric power company and the building manager.

Note that FIG. 1 illustrates a part of devices such as the sub controller 14 connected to the lower level of the central management device 10 due to space limitations, and various devices are connected in addition to the illustrated configuration. You may be.

The central management device 10 has a function as a client PC whose operation is monitored by an administrator of the building 11 and the like, and a function as a server which performs data storage, application processing, and the like. In the central management device 10, for example, screen display and setting operations are performed.

Further, the central management device 10 is connected to the remote management device 12 via the gateway device 15 and the communication line 16. The gateway device 15 is, for example, an intervening device for communication between a device inside the BEMS system and a device outside the BEMS system. The gateway device 15 can transmit information of the other (for example, the central management device 10) to one in accordance with the communication protocol of one (for example, the remote management device 12) by interposing between devices having different communication protocols, for example. .. Further, as the communication line 16, for example, a dedicated line between two points connecting the central management device 10 and the remote management device 12 or a general line is used.

The sub controller 14 mainly has a control function. The sub-controller 14 is composed of, for example, a so-called B-BC (BACnet Building Controller), and manages point data, schedule control, and the like. For example, one sub-controller 14 is provided for each functional system (subsystem) such as an air-conditioning equipment system, a lighting equipment system, an elevator system, a sanitary equipment system, and a crime prevention equipment system.

The remote management device 12 is installed remotely away from the central management device 10. For example, the remote management device 12 can be connected to a plurality of central management devices 10. For example, the remote management device 12 is installed in a maintenance company (maintenance center) that has a building maintenance contract, and the central management device 10 is installed in a building owned by a building manager (client) that has a building maintenance contract.

The remote management device 12 can receive data on equipment operation data, main power consumption [kW], and power consumption [kWh] from each central management device 10. Here, the equipment operation data is data detected from a sensor such as the illuminance sensor 22A, and is the power consumption [kW], power consumption amount [kWh], temperature, illuminance, air volume, rotation of each electric device 20. Various data such as number, torque, set temperature, etc. are included.

The power consumption [kW] is theoretically an instantaneous value, but the so-called demand value may be treated as the power consumption [kW] in accordance with the practice of calculating the power charge. The demand value refers to the 30-minute average value of power consumption [kW].

Further, as will be 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 operation of the electric devices 20A to 20C in the building 11, and the central management device 10 receiving the control command from the remote management device 12 causes these electric devices 20A to 20C. The operation of 20C is controlled.

The central management device 10, the remote management device 12, and the sub-controllers 14A and 14B are composed of a computer. For example, as typically shown in the central management device 10 and the remote management device 12, each of them includes a CPU 26, a memory 28, a hard disk drive (HDD) 30, an input unit 32, an output unit 34, and an input / output interface 36. Provided.

As will be described later, the CPU 26, the memory 28, and the hard disk drive 30 of the remote management device 12 determine the functional blocks of the power saving plan creation unit as illustrated in FIG. 2 and the power saving plan evaluation unit as illustrated in FIG. Functional blocks are configured. Further, the output unit 34 is, for example, a display, and for example, a change in power consumption per building is displayed. Further, in the power saving plan creation 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 for example, a target reduction amount to be described later can be input. Further, the registered contents of the demand control list can be set and changed by inputting to the input unit 32.

FIG. 2 illustrates a functional block of the power saving plan creation unit of the remote management device 12. The remote management device 12 has an amount input unit 50, a currency conversion unit 52, an amount distribution unit 54, a target maximum power calculation unit 56, a target reduction power amount calculation unit 58, a control planning unit 60, and an output unit 62 as arithmetic processing units. To be equipped. The output unit 62 is connected to the output unit 34, which is a display.

Further, the remote management device 12 includes a property information storage unit 70, a distribution ratio storage unit 72, a power charge system storage unit 74, a power consumption actual measurement value storage unit 76, and an output restriction content storage unit 78 as storage units.

A program for executing the power saving plan creation process described later is executed by the remote management device 12 which is a computer. As a result, resources such as the CPU 26, the memory 28, and the hard disk drive 30 of the remote management device 12 are allocated, and each functional unit illustrated in FIG. 2 is configured.

To outline the action and effect of each functional block of the remote management device 12, the target reduction amount of the electric power charge for the predetermined building 11 is input to the amount input unit 50. The target reduction amount is, for example, the difference (α1-α2) when the power charge is reduced from the power charge α1 to the power charge α2. For example, when a building owner requests to reduce the electricity charge by Δα yen compared to last year, the Δα yen will be the target reduction amount.

The target reduction amount may be an annual amount or a monthly amount. Further, the currency of the target reduction amount may be, for example, the currency in which the remote control device 12 is installed.

In the currency conversion unit 52, the target reduction amount input to the amount input unit 50 is converted into a currency-based amount in the area where the building 11 is installed. In the amount distribution unit 54, when the electricity charge is a two-part charge system of a fixed charge and a metered charge, the target reduction amount after conversion to the local currency is divided into a fixed charge reduction amount and a metered charge reduction amount. Will be distributed.

The target maximum power calculation unit 56 is required to obtain the target maximum power [kW], which is the target reduction power according to the reduction amount for the fixed charge. The target reduced electric energy calculation unit 58 is required to obtain a target reduced electric energy [kWh] according to the reduction amount for the metered charge.

In order to achieve the target maximum power [kW] and the target reduction power amount [kWh], the control planning unit 60 creates an electric device subject to operation restriction and a control plan in which the restriction content is defined. That is, the control planning unit 60 has at least one electric device and at least one output that satisfy the target reduced electric energy amount based on the measured power consumption value and the output limitation content of each of the electric devices 20A to 20C installed in the building 11. Ask for restrictions.

The created control plan is output from the output unit 62. When the output control plan is approved by the manager (building owner, etc.) of the building 11, the approval instruction is transmitted to the control planning unit 60. After that, the control planning unit 60 transmits the approved control plan to the central management device 10 of the building 11. The central management device 10 controls the operation of the electric devices 20A to 20C based on the control plan.

The property information storage unit 70 stores information on the building 11 and information on the area where the building 11 is installed. Specifically, as illustrated in FIG. 3, the property information storage unit 70 includes a building name, a building manager, an address, a location area, a currency, an exchange rate, a date of completion, a building age, and a total floor area. Information such as the number of floors is stored.

As described above, the property information storage unit 70 stores the currency and the exchange rate. The currency indicates the currency (local currency) of the area (country) where the building 11 was built, and the exchange rate indicates the conversion ratio between the local currency and the currency of the target reduction amount entered in the amount input unit 50. .. Instead of the conversion ratio between the local currency and the currency of the target reduction amount input to the amount input unit 50, the conversion ratio between the local currency and the currency of the location area (country) of the building manager may be used.

Since the exchange rate fluctuates with time, it is preferable that the remote control device 12 periodically acquires and updates the exchange rate from the exchange rate or the like. In this way, since the exchange rate is stored in the property information storage unit 70, the property information storage unit 70 includes the exchange rate storage unit as a part thereof.

In the distribution ratio storage unit 72, when the electricity rate system adopts a two-part rate system of a fixed rate and a metered rate, the share of the target reduction amount is distributed to the fixed rate and the metered rate (distribution rate). Is remembered. As will be described later, when the fixed charge is determined based on the maximum power consumption [kW] and the metered charge is determined based on the power consumption [kWh], according to the distribution ratio stored in the distribution ratio storage unit 72. Each burden is distributed (proportionately).

The distribution ratio of the distribution ratio storage unit 72 may be arbitrarily changed by, for example, the manager of the building 11 or the like through an input operation in the input unit 32. For example, the distribution ratio may be changed due to a change in the electricity rate system.

The electric power charge system storage unit 74 stores the electric power charge system determined between the manager of the building 11 and the supply source (electric power company) that supplies electric power to the building 11. For example, as illustrated in FIG. 4, the power charge system storage unit 74 stores information such as the power classification of the received power, the charge plan, and the contracted power company.

For example, as a rate plan, a basic charge, which is a fixed charge, an electric energy charge, which is a metered charge, and a renewable energy power generation promotion levy are stored in the electric power charge system storage unit 74. The electric energy charge is calculated by the following formula (1).

[Number 1]
Electric energy charge = Electric energy charge Unit price x Electric energy consumption ± Fuel cost adjustment amount ・ ・ ・ (1)

In the above formula (1), the electric energy charge unit price is illustrated in FIG. In this example, the unit price of electricity is determined in three stages: weekdays in summer, weekdays other than summer, and holidays. The fuel cost procurement amount is determined according to the price fluctuation of thermal fuel.

In the formula (1), the electric energy used is the main electric energy of the building 11, that is, the electric energy [kWh] of the total power consumption of the building 11 unit, and is detected by the main electric energy meter 22E. For example, as illustrated in FIG. 5, the main power meter 22E determines the power consumption (power consumption) for each month. Based on this value, the electricity charge for each month is calculated.

In the example of FIG. 4, the electric energy charge unit price is set according to the season and the weekday / holiday classification, but in addition to this, the electric energy charge unit price is changed according to the monthly power consumption of the main power. Such a charge system can be stored in the electric power charge system storage unit 74.

For example, the unit price of electric energy may be changed depending on whether the monthly power consumption is less than 100 kWh, 100 kWh or more and less than 300 kWh, or 300 kWh or more. In this case, for example, the larger the monthly power consumption, the higher the electric energy charge unit price.

The renewable energy power generation promotion levy is calculated by the following mathematical formula (2).

[Number 2]
Renewable energy power generation promotion levy = Renewable energy power generation promotion levy unit price x power consumption ・ ・ ・ (2)

In addition, the basic charge, which is a fixed charge, is calculated by the following formula (3).

[Number 3]
Basic charge = Basic charge Unit price x Contract power x Power factor ratio ・ ・ ・ (3)

In the formula (3), the basic charge unit price A [yen / kW] is stored in the electric power charge system storage unit 74 as illustrated in FIG. The power factor ratio is determined based on the ratio of active power and reactive power measured by the main power meter 22E.

The contract power [kW] is determined based on the maximum power consumption [kW] in a predetermined period. For example, FIG. 6 illustrates the maximum monthly power consumption. In the graph of FIG. 6, the horizontal axis shows the month, and the vertical axis shows the monthly maximum power consumption [kW] detected by the main power meter 22E.

When determining the contract power, if the maximum power consumption P_CD0 is detected in a certain month (for example, July), the contract power of each month is fixed to P_CD0 even if it falls below the maximum power consumption P_CD0 for one year thereafter.

For example, FIG. 7 illustrates the daily maximum power consumption [kW] of July, and FIG. 8 further illustrates the maximum power consumption [kW] of a predetermined day of July (for example, July 10). .. In FIG. 8, as the power consumption, a demand value which is a 30-minute average value of the power consumption which is an instantaneous value is used. As shown in FIG. 7, for example, even if only the power consumption from 15:00 to 15:30 on July 10 is P_CD0 and the power consumption on other dates and times is less than the maximum power consumption P_CD0. , July and the contract power for the next year will be set to P_CD0.

Considering this from the viewpoint of power saving, it is possible to reduce the contract power only by suppressing the power consumption on a specific date and time (for example, from 15:00 to 15:30 on July 10), and the contract power contract period. It is possible to reduce the electricity charge for one year.

The above-mentioned electric power charge system is a charge system widely adopted by Japanese electric power companies, and the electric power charge system of electric power companies in other countries and regions is naturally stored in the electric power charge system storage unit 74. Can be remembered.

For example, in China (People's Republic of China), a two-part tariff system consisting of a basic tariff and a pay-as-you-go tariff, which is charged from the capacity of power receiving equipment, is adopted for large consumers. Since the capacity of the power receiving equipment basically does not change unless the electric equipment is replaced, such as when the electric equipment in the building 11 is updated to an energy-saving type, in this case, the pay-as-you-go charge is reduced by reducing the electric energy [kWh]. It is preferable to reduce it. That is, in the distribution ratio storage unit 72, the basic charge: the metered charge = 0: 100 may be set.

Further, for example, in Sri Lanka, the electricity charge is composed of a two-part system of a basic charge and a metered charge, but not only the metered charge but also the basic charge can fluctuate depending on the monthly power consumption. Therefore, in this case, by reducing the amount of electricity, both the metered rate and the basic rate can be reduced.

The measured power consumption value storage unit 76 stores the measured values of the main power [kW] and the main power [kWh] of the building 11 in which the central management device 10 connected to the remote management device 12 is installed. For example, the power [kW] detected by the main power meter 22E and the integrated power amount [kWh] are stored in the power consumption actual measurement value storage unit 76. For example, the power consumption measured value storage unit 76 stores the power consumption [kWh] of the main power for each of FIG. 6 (monthly unit), FIG. 7 (single day unit), and FIG. 8 (hour unit). In calculating the power consumption, the power consumption may be obtained by integrating the demand value of the main power [kW].

In addition, 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 measured value storage unit 76. In addition, the time change of the operating state (temperature setting, air volume setting, etc.) of each electric device 20A to 20C is synchronized with the time change of the power consumption [kW] and the power consumption amount [kWh] of each electric device 20A to 20C. It may be stored in the power consumption measured value storage unit 76.

The output restriction content storage unit 78 stores the output restriction content for arbitrary electric devices 20A to 20C installed in the building 11. The electrical equipment 20 subject to output restriction may be all electrical equipment in the building 11, and for example, electrical equipment having high importance such as air conditioning in a server room that requires constant temperature control is subject to output restriction. It may be excluded. The selection of the electrical equipment subject to such output restriction and the specific content of the restriction may be predetermined based on consultation with the building manager and the operator of the remote management device 12.

FIG. 9 illustrates a list of output restriction targets for each electric device 20 stored in the output restriction content storage unit 78. The output limit list illustrated in the figure is based on so-called demand control, and a plurality of limit levels (DmdLv) may be defined. As illustrated in the figure, the higher the limit level, the more the number of target electric devices 20 is increased, and the output limit thereof is strengthened (stricter).

For example, in FIG. 9, the limit level DmdLv1 is set to cut the output by 25% with respect to the air conditioning 1. Specific contents of this output cut control are exemplified in FIGS. 10 and 11. In FIGS. 10 and 11, the horizontal axis represents time and the vertical axis represents power consumption [kW]. The power consumption [kW] may be a demand value. The broken line shows the measured value, and the solid line shows the predicted value when the output limit is implemented. Further, the power consumption shown in FIGS. 10 and 11 may be an actually measured value (past value) of the electric device (air conditioner 1) for which the output limit is set.

As a specific content of the output limit, for example, when the daily power consumption is reduced, the equal limit is executed so that the output is evenly limited over the entire time zone as illustrated in FIG. You may. Further, as a specific content of the output limitation, a peak cut may be executed in which the output limitation is applied aiming at a time zone in which the power consumption exceeds the target contract power P_Obj as illustrated in FIG.

Further, in FIGS. 12 and 13, monthly control contents of output cut control are set. Specific contents of this output cut control are illustrated in FIGS. 12 and 13. In FIGS. 12 and 13, the horizontal axis represents time and the vertical axis represents power consumption [kWh]. The power consumption [kWh] may be an integrated value of the demand value. The broken line shows the measured value, and the solid line shows the predicted value when the output limit is implemented. Further, the power consumption shown in FIGS. 12 and 13 may be an actually measured value (past value) of the electric device (air conditioner 1) for which the output limit is set.

As a specific content of the output limitation, for example, as illustrated in FIG. 12, the equalization limitation may be implemented in which the output is evenly restricted over the entire month. Further, as a specific content of the output limit, a peak cut may be executed in which the output limit is applied aiming at the month when the power consumption exceeds the target power amount WH_Obj as illustrated in FIG.

<Power saving plan creation process (1)>
FIG. 14 illustrates a flowchart of the power saving plan creation process in the remote management device 12 according to the present embodiment. In this example, the process of creating a control plan for achieving power saving by reducing electric energy [kWh] is illustrated.

In the flowchart shown in FIG. 14, a control plan for achieving power saving only by reducing the metered charge is illustrated. Therefore, the distribution ratio is determined in the distribution ratio storage unit 72 at a fixed charge: metered charge = 0: 100 [%].

With reference to FIGS. 1, 2, and 14, the target reduction amount is input to the amount input unit 50 of the remote management device 12 through the input operation to the input unit 32 of the remote management device 12. The target reduction amount may be, for example, an annual target reduction amount or a monthly target reduction amount. In order to enable input of the target reduction amount for each period, for example, on the display of the output unit 34, in addition to the input field for the target reduction amount, an input field for selecting the power saving period (annual / monthly) is provided. It may be provided. The power saving period selected in the input field is reflected as the control period of the subsequent control plan.

The currency conversion unit 52 obtains the exchange rate between the currency of the amount input from the property information storage unit 70 and the currency of the area where the building 11 is installed from the property information storage unit 70. Further, the currency conversion unit 52 calculates the 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). ..

In the amount distribution unit 54, since the distribution rate of the metered charge is 100% as described above, the total amount of the conversion target reduction amount is sent to the target reduction electric energy calculation unit 58 as it is. The target reduction power amount calculation unit 58 obtains the power charge system data determined for the building 11 from the power charge system storage unit 74, and based on the data and the conversion target reduction amount, sets the target reduction power amount ΔWH_Obj. Find (S12).

For example, as described above, when the metered charge is the sum of the electric energy charge and the renewable energy power generation promotion levy, the following mathematical formula (4) can be obtained from the mathematical formulas (1) and (2).

[Number 4]
Conversion target reduction amount = (electric energy charge unit price + renewable energy power generation promotion levy unit price) × target reduction electric energy amount ± fuel cost adjustment amount ・ ・ ・ (4)

Substituting the conversion target reduction amount obtained in step S12 into the above formula (4), and further, the electric energy charge unit price, the renewable energy power generation promotion levy unit price, and the fuel cost used in the calculation of the latest electric power charge. By substituting the adjustment amount into the formula (4), the target reduction power amount ΔWH_Obj can be obtained. The obtained target reduced electric energy ΔWH_Obj is sent to the control planning unit 60.

The control planning unit 60 refers to the output restriction content storage unit 78, and sets an electric device subject to output restriction and its control content so as to satisfy the target reduced electric energy ΔWH_Obj. Specifically, based on the output limit list illustrated in FIG. 9, the electric device subject to the output limit and the control content thereof are selected.

For example, it is examined from the electrical equipment set to DmdLv1 and the restriction contents, which have the lowest output restriction level, in other words, the most acceptable as a power saving measure. The control planning unit 60 sets the output limit level count m (m = 1 to 4) to 1 (S14). Further, the control planning unit 60 extracts a list of the output restriction level DmdLv_m (= 1) from the output restriction content storage unit 78.

The control planning unit 60 sets the count k of the electrical equipment set (registered) in the list of the output limit level DmdLv_m (= 1) to the initial value 1 (S16). Further, based on the restriction content set for the k (= 1) th electric device, the reduced electric energy ΔWH_k [kWh] due to the execution of the restriction content of the electric device is calculated (S18).

For example, referring to FIG. 9, when the limitation content is the output 25% cut, the value of the measured value × 25% of the power consumption of the electric device is set as the reduced power amount ΔWH_k [kWh]. Actually, the total amount of reduced power of the electric device is required over the entire power saving period. For example, in order to simplify the calculation, the measured value of the total power consumption over the period before the power saving is carried out in the same period as the power saving period (for example, one year) is multiplied by a value of 25% to reduce the power consumption. The amount is ΔWH_k [kWh]. Alternatively, when the reduced power amount associated with the execution of the limited content is known in advance or a predicted value is required, the reduced power amount ΔWH_k [kWh] corresponding to the limited content is obtained.

The measured value of the power consumption value of each electric device, which is the calculation standard of the reduced power amount ΔWH_k, may be, for example, the power consumption value of each electric device under the condition that the output limit is not applied. Further, for example, an electric device for which some output limitation has already been applied at the time of detecting the measured value may be excluded from the count k.

Next, the control planning unit 60 determines whether or not the total reduced electric energy ΣΔWH_k according to the electric devices selected so far and the limited contents thereof is equal to or more than the target reduced electric energy ΔWH_Obj (S20). When ΣΔWH_k ≧ ΔWH_Obj, the control planning unit 60 creates a list (control plan list) listing the electric devices selected in steps S14 to S20 and their restrictions, and outputs the list (control plan list) to the output unit 62. (S22).

This control plan list is once viewed by the manager of the remote management device 12 and the manager of the building 11, and the validity of the control contents is examined. When it is determined that the contents of the control plan list are appropriate, an instruction to the effect that the control plan is approved is sent to the control planning unit 60 (see FIG. 2), and the control planning unit 60 controls according to the control plan. The command is sent to the central management device 10 of the building 11. On the other hand, if it is determined that the contents of the control plan list are not appropriate, the target amount is changed and the power saving plan creation 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 equipment set (registered) in the list of the output limit level DmdLv_m (= 1) is the maximum value k_max. Judgment (S24). When the count k has not reached the maximum value k_max, the control planning unit 60 increments (S30) the count k of the electric device, and then returns the flow to step S18.

When the count k of the electric device 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 has not reached m_max, the control planning unit 60 increments the count m (S32) and then returns the flow to step S16.

When the count m is incremented, the previously accumulated ΣΔWH_k may be reset to 0.

On the other hand, when the count m of the output limit level DmdLv_m has reached the maximum value m_max in step S26, it is assumed that the target amount cannot be achieved by the output limit menu stored in the output limit content storage unit 78. , An error message is output to the output unit 62 (S28). For example, a message is output to the effect that the target reduction amount should be reduced and the power saving plan creation process should be executed again.

As described above, in the power saving support system according to the present embodiment, the control plan corresponding to the target reduction power amount based on the local currency in which the building 11 is installed is calculated only by inputting the target reduction amount. Therefore, for example, it is possible to compare power saving plans for the target reduction amount of buildings in multiple countries and regions on a single currency basis.

<Power saving plan creation process (2)>
15 and 16 illustrate a flowchart of the power saving plan creation process in the remote management device 12 according to the present embodiment. Since the contents of the processes with the same step codes as those in the flowchart of FIG. 14 are duplicated, the description thereof will be omitted as appropriate.

In the flowchart illustrated in FIGS. 15 and 16, the target contract power P_Obj and the target reduction power amount ΔWH_Obj are obtained according to the target reduction amount, and the electrical equipment and its limitation contents satisfying both are set. ..

With reference to FIGS. 2 and 15, after converting the target reduction amount into the local currency, the amount distribution unit 54 fixes the conversion target reduction amount based on the distribution rate stored in the distribution ratio storage unit 72. Divide into the charge (basic charge) and the pay-as-you-go charge. Further, the target contract power P_Obj [kW] and the target reduction power amount ΔWH_Obj [kWh] are obtained based on the target reduction amount and the power charge system after distribution (S42).

The target reduced electric energy ΔWH_Obj [kWh] can be obtained by using the mathematical formula (4) as described above. The target contract power P_Obj [kW] can be obtained by using the mathematical formula (3). Specifically, the following mathematical formula (5) can be obtained from the mathematical formula (3).

[Number 5]
Basic charge (before power saving) = Basic charge unit price x Contract power (before power saving) x Power factor ratio Basic charge (during power saving) = Basic charge unit price x Contract power (during power saving) x Power factor ratio ・ ・ ・ (5)

In formula (5), the basic charge unit price of the upper formula can be obtained from the power charge system storage unit 74, the contracted power (before power saving) can be obtained from the power consumption actual measurement value storage unit 76, and the power factor ratio is the main unit. It can be obtained from the power meter 22E. Therefore, by substituting these values, the basic charge (before power saving) can be obtained.

Furthermore, in the lower formula, the basic charge (at the time of power saving) is obtained by subtracting the fixed charge (basic charge) of the conversion target reduction amount from the calculated basic charge (before power saving). In addition, by substituting the same values as the above formula for the basic charge unit price and power factor ratio, the contract power (at the time of power saving), that is, the target contract power P_Obj can be obtained.

For example, the target contract power P_Obj is set to a value lower than the contract power P_CD0 in the measured value, as illustrated in FIG. As will be described later, the content of the output limitation is determined in order to reduce the power protruding from the target contract power P_Obj, which is shown by hatching in FIG.

In steps S14 to S32, as in FIG. 14, an electric device satisfying the target reduced electric energy ΔWH_Obj [kWh] and its restriction contents are defined.

Further, in step S20, when the electric device satisfying the target reduction power amount ΔWH_Obj [kWh] and the limitation content thereof are determined, the maximum power consumption (maximum demand value) of the main power is set to the entire power saving period by proceeding to FIG. Through this, it is determined whether or not the power is within the target contract power P_Obj (S48). For example, it is determined whether or not the maximum power consumption of the main power of the entire building 11 when the above-mentioned restrictions are executed is within the target contract power P_Obj.

When the maximum power consumption of the main power is within the target contract power P_Obj, the control planning unit 60 creates a list (control plan list) listing the electric devices selected in steps S14 to S20 and their restrictions. This is output to the output unit 62 (S50). Similar to the flowchart of FIG. 14, this control plan list is viewed by the manager of the remote management device 12 and the manager of the building 11, and the validity of the control content is examined.

When it is determined that the contents of the control plan list are appropriate, an instruction to the effect that the control plan is approved is sent to the control planning unit 60 (see FIG. 2), and the control planning unit 60 controls according to the control plan. The command is sent to the central management device 10 of the building 11. On the other hand, if it is determined that the contents of the control plan list are not appropriate, at least one of the target amount and the distribution ratio is changed, and the power saving plan creation process is executed again.

Returning to step S48, when it is predicted that the maximum power consumption of the main power exceeds the target contract power P_Obj, the control planning unit 60 has the maximum count k of the electric equipment set (registered) in the list of the output limit level DmdLv_m. It is determined whether or not the value is k_max (S52). When the count k has not reached the maximum value k_max, the control planning unit 60 increments (S58) the count k of the electric device, and then returns the flow to step S46.

In step S46, the control planning unit 60 calculates the reduceable power ΔP_k [kW] based on the output limit content set for the selected electric device. For example, the reducible power ΔP_k [kW] is calculated from the difference between the power consumption of the electric device in the measured value and the power consumption (predicted value) associated with the execution of the output restriction content.

Returning to step S52, when the count k of the electric device reaches the maximum value k_max, 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 (S54). When the count m has not reached m_max, the control planning unit 60 increments the count m (S60) and then returns the flow to step S44. In step S44, the count k of the electrical device is reset to 1.

Along with this reset, the total amount of power that can be reduced ΣΔWH_k is reset to 0. However, since the level of the output limit list is raised one step higher, the limit becomes stricter, and the total reductionable electric energy ΣΔWH_k becomes equal to or more than the target reduction electric energy ΔWH_Obj. Therefore, the relationship with ΣΔWH_k ≧ ΔWH_Obj is continuously maintained.

When the count m of the output limit level DmdLv_m has reached the maximum value m_max in step S54, it is assumed that the target amount cannot be achieved by the output limit menu stored in the output limit content storage unit 78, and an error occurs. The message is output to the output unit 62 (S56). For example, a message is output to the effect that the target reduction amount should be reduced or the amount distribution rate should be corrected and the power saving plan creation process should be executed again.

As described above, in the power saving support system according to the present embodiment, the control plan corresponding to the target reduction power amount based on the local currency in which the building 11 is installed is calculated only by inputting the target reduction amount. Therefore, for example, it is possible to compare power saving plans for the target reduction amount of buildings in multiple countries and regions on a single currency basis.

Based on the control plan list approved by the building manager or the like, that is, the power saving plan, the control planning unit 60 generates a control command and transmits the control command to the central management device 10 of the building 11. The central management device 10 controls the operation of the electric devices 20A to 20C under the control based on the received control command.

<Power saving plan evaluation process>
When the execution period of the power saving plan is completed, the validity of the power saving plan is evaluated. That is, whether or not the target reduction plan has been achieved, the selection of the electrical equipment subject to the output restriction, and the validity of the output restriction content are evaluated.

FIG. 18 illustrates a functional block in the power saving plan evaluation unit of the remote management device 12 which is a building management device. The remote management device 12 includes an electric power charge calculation unit 100, a difference determination unit 102, a success fee calculation unit 104, a maintenance point calculation unit 106, an unachieved amount calculation unit 108, a first penalty point calculation unit 110, and as arithmetic processing units. A second penalty point calculation unit 112 is provided.

Further, the remote management device 12 includes a power charge system storage unit 114 and a power consumption actual measurement value storage unit 116 as storage units. These storage units may be the same as or separate from the power charge system storage unit 74 and the power consumption measured value storage unit 76 illustrated in FIG. The same contents may be stored in the power charge system storage units 74 and 114 and the power consumption actual measurement value storage units 76 and 116, respectively.

The electric power charge system storage unit 114 stores an electric power charge system determined between the manager of the building 11 and the supply source (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 114 stores information such as the electric power classification of the received electric power, the electric power plan, and the contracted electric power company.

The measured power consumption value storage unit 116 stores the measured values of the main power [kW] and the main power [kWh] of the building 11 in which the central management device 10 connected to the remote management device 12 is installed. For example, the power [kW] detected by the main power meter 22E and the integrated power amount [kWh] are stored in the power consumption actual measurement value storage unit 116. For example, the power consumption actual measurement value storage unit 116 stores the power consumption [kWh] of the main power for each of FIG. 6 (monthly unit), FIG. 7 (single day unit), and FIG. 8 (hour unit). In calculating the power consumption, the power consumption may be obtained by integrating the demand value of the main power [kW].

In addition, 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 measured value storage unit 116. In addition, the time change of the operating state (temperature setting, air volume setting, etc.) of each electric device 20A to 20C is synchronized with the time change of the power consumption [kW] and the power consumption amount [kWh] of each electric device 20A to 20C. It may be stored in the power consumption measured value storage unit 116.

In the power saving plan evaluation process, the power saving period charge α1, the power saving period charge α2, the actual difference amount Δα_Cal, the target reduction amount Δα_Obj, the success fee Fs, the unachieved amount Δβ, the maintenance point P1, the first penalty point P2, and the second penalty point. P3 is calculated.

With reference to FIG. 19, the pre-power saving period charge α1 is the power during the reference period in which the control plan defined in FIGS. 14 to 16 is not executed, for example, the same period as the execution period and the power saving plan is not executed. Show the price. The power saving period charge α2 indicates the power charge during the execution period (for example, one year) specified in the control plan.

The actual difference amount Δα_Cal indicates the difference amount obtained by subtracting the power saving period charge α2 from the power saving period charge α1. The success reward Fs is a value (Fs = ΔCal × a1) obtained by multiplying the actual difference amount Δα_Cal by a predetermined conversion ratio a1. The conversion ratio a1 can take any value from 0% to 100%, for example (0% ≤ a1 ≤ 100%). For example, in FIG. 19, a1 = 50%. The success fee Fs indicates the amount of money paid by the manager of the building 11, in other words, the contractor of the maintenance management of the building 11, to the facility service company that owns the remote management device 12 as a reward for saving electricity.

The maintenance point P1 is a value (P1 = Fs × a2) obtained by multiplying the success reward Fs by a predetermined conversion ratio a2. The conversion ratio a2 can be any value from 0% to 100%, for example (0% ≤ a2 ≤ 100%). For example, in FIG. 19, a2 = 50%.

The maintenance point P1 assists the cost burden of the maintenance management service provided by the facility service company that owns the remote management device and controls the power saving, and reduces the cost burden of the maintenance management service by the manager of the building 11. It is a thing. Such a point for reducing the maintenance burden functions as an incentive for the manager of the building 11 to continue the maintenance contract with the facility service company.

With reference to FIG. 20, the unachieved amount Δβ is the value obtained by subtracting the actual difference amount Δα_Cal from the target reduction amount Δα_Obj, and is the unachieved amount of the power charge reduction amount due to the execution of the power saving plan from the target reduction amount Δα_Obj. Is shown.

The first penalty point P2 is a value (P2 = Δβ × a3) obtained by multiplying the unachieved amount Δβ by the conversion ratio a3. The conversion ratio a3 can take any value from, for example, 0% to 100% (0% ≤ a3 ≤ 100%). For example, in FIG. 20, a3 = 50%.

The first penalty point P2, like the maintenance point P1, subsidizes the cost burden of the maintenance management service, and reduces the cost burden of the maintenance management service by the manager of the building 11. On the other hand, the source of the maintenance point P1 is based on the success fee Fs paid by the manager of the building 11, while the first penalty point P2 is borne by the facility service company that owns the remote management device 12.

For example, when the reduction amount Δα_Cal by the power saving service contracted by the facility service company does not reach the target reduction amount Δα_Obj, the first penalty point P2 is generated as compensation (compensation). As a facility service company, the first penalty point P2 can be reduced by improving the accuracy of the power saving plan, such as changing the setting of the power saving plan. Further, as the manager of the building 11, the incentive for the continuation of the maintenance contract is provided by the first penalty point P2.

With reference to FIG. 21, the second penalty point P3 is the actual difference amount Δα_Cal when the power saving period charge α2 exceeds the power saving period charge α1, in other words, when the actual difference amount Δα_Cal (= α1-α2) becomes negative. It is obtained by multiplying the absolute value of (excess amount) by a predetermined conversion ratio a4 (P3 = | Δα_Cal × a4 |).

In executing the power saving plan, the power charge α2 of the main power in the power saving period may exceed the power saving period charge α1 due to an increase in the output of an electric device that is not subject to output restriction. In such a case, the facility service company that provides the power saving service contributes a second penalty point in order to compensate (compensate) for the failure of power saving.

The second penalty point P3, like the maintenance point P1 and the first penalty point P2, assists the cost burden of the maintenance management service and reduces the cost burden of the maintenance management service by the manager of the building 11. Is. Further, similarly to the first penalty point P2, the second penalty point P3 is borne by the facility service company that owns the remote management device 12.

From the viewpoint of failure of the power saving service, it is considered that it is more important that the power saving period charge α2 exceeds the power saving period charge α1 than the unreached amount Δβ occurs. Therefore, the conversion ratio a4 used when calculating the second penalty point P3 from the negative actual difference amount Δα_Cal is higher than the conversion ratio a3 used when calculating the first penalty point from the unreached amount Δβ. It may be (a4> a3). For example, as illustrated in FIG. 21, a4 = 100% may be used.

<Power saving plan evaluation flow>
FIG. 22 illustrates a flowchart of power saving plan evaluation by the remote management device 12. With reference to FIGS. 18 and 22, after the end of the power saving period, the power charge calculation unit 100 calculates the power saving period charge α2 (S100). Specifically, the power charge calculation unit 100 acquires the power amount [kWh] and the power [kW] (for example, a 30-minute demand value) of the main power during the power saving period from the power consumption actual measurement value storage unit 116. Further, the electric power charge calculation unit 100 calculates the electric power charge α2 in the power saving period with reference to the electric power charge system storage unit 114.

The power charge calculation unit 100 also calculates the power saving period charge α1 (S102). For example, when the power saving period is from 4/1 to 3/31 of the following year, the main power for the same period, for example, the period (base period) of the previous year (4/1 to 3/31 of the following year). The electric energy [kWh] and the electric power [kW] (for example, a 30-minute demand value) are acquired from the electric energy actual measurement value storage unit 116. Further, the electric power charge calculation unit 100 calculates the power charge before power saving period charge α1 which is the electric power charge in the reference period with reference to the electric power charge system storage unit 114.

The power saving period charge α1 and the power saving period charge α2 are sent to the difference determination unit 102. In the difference determination unit 102, the actual difference amount Δα_Cal is obtained by subtracting the power saving period charge α2 from the power saving period charge α1 (S104).

The difference determination unit 102 determines whether or not the actual difference Δα_Cal is a negative value (S106). When the actual difference amount Δα_Cal is zero or a positive value, the difference determination unit 102 sends the actual difference amount Δα_Cal to the success fee calculation unit 104 and the unachieved amount calculation unit 108.

The success reward calculation unit 104 calculates the success reward Fs from the product of the actual difference Δα_Cal and the conversion ratio a1 (S108). The success reward Fs is sent to the maintenance point calculation unit 106. The maintenance point calculation unit 106 calculates the maintenance point P1 from the product of the success reward Fs and the conversion ratio a2 (S110).

The undelivered amount calculation unit 108 determines whether or not the actual difference amount Δα_Cal is equal to or greater than the target reduction amount Δα_Obj (S112). When the actual difference amount Δα_Cal is equal to or greater than the target reduction amount Δα_Obj, the success reward Fs and the maintenance point P1 calculated in steps S108 and S110 are output from the output unit 34 (see FIG. 1) of the remote management device 12. In addition, the burden on the facility service company (maintenance company) is zero (S114).

In step S112, when the actual difference amount Δα_Cal is less than the target reduction amount Δα_Obj, the unreached amount calculation unit 108 calculates the first penalty point P2 by multiplying the unachieved amount Δβ by the conversion ratio a3 (S116). As a result, in addition to the success reward Fs and maintenance point P1 calculated in steps S108 and S110, the first penalty point P2, which is borne by the facility service company, is the output unit 34 of the remote management device 12 (see FIG. 1). Is output from (S118).

Returning to step S106, when the actual difference amount Δα_Cal is a negative value, that is, the power saving period charge α2 exceeds the power saving period charge α1, the difference determination unit 102 sends the actual difference amount Δα_Cal to the second penalty point calculation unit 112. Further, the difference determination unit 102 instructs the first penalty point calculation unit 110 to calculate the first penalty point P2.

The second penalty point calculation unit 112 calculates the second penalty point P3 from the product of the absolute value | Δα_Cal | of the actual difference amount and the conversion ratio a4 (S120). Further, the first penalty point calculation unit 110 calculates the first penalty point P2 by multiplying the target non-achieved amount, that is, the total amount of the target reduction amount Δα_Obj by the conversion ratio a3 (S122).

In this case, the first penalty point P2 calculated in step S120 and the second penalty point P3 calculated in step S122 are output from the output unit 34 (see FIG. 1) of the remote management device 12 (S124). All of these penalty points will be borne by the facility service company.

The maintenance point P1, the first penalty point P2, and the second penalty point P3 obtained by the above power saving evaluation process all support the cost burden of the maintenance management service for the building 11. For example, the maintenance point P1, the first penalty point P2, and the second penalty point P3 can be used at the time of replacement of the air conditioning equipment of the building 11 or at the time of so-called modernization including renewal or renewal of other equipment.

The maintenance point P1, the first penalty point P2, and the second penalty point P3 may have a validity period of a plurality of years. In addition, these points from the previous year and the year before the previous year may be accumulated.

In addition, the power saving plan may be reviewed based on the above power saving evaluation process. For example, the output limit list of FIG. 9 may be reviewed so as to suppress the occurrence of the first and second penalty points. Further, the target reduction amount Δα_Obj for 11 units of the building may be reviewed.

10 Central management equipment, 11 buildings, 12 remote management equipment, 14 sub-controllers, 15 gateway equipment, 16 communication lines, 20 electrical equipment, 22 sensors, 22E main power meter, 50 amount input unit, 52 currency conversion unit, 54 amount distribution Unit, 56 Target maximum power calculation unit, 58 Target reduction power calculation unit, 60 Control planning unit, 62 Output unit, 70 Property information storage unit, 72 Distribution ratio storage unit, 74,114 Power charge system storage unit, 76,116 Electric energy measurement value storage unit, 78 Output restriction content storage unit, power charge calculation unit 100, difference determination unit 102, success fee calculation unit 104, maintenance point calculation unit 106, unachieved amount calculation unit 108, first penalty point calculation Unit 110, second penalty point calculation unit 112.

Claims (3)

A building management device that can control the operation of multiple electrical devices installed in a building.
Amount input section where the target reduction amount is input, and
A control planning unit that generates a power saving plan in which the electrical equipment and its output limitation contents are defined according to the target reduction amount.
Maintenance point calculation unit that calculates maintenance points to assist the cost burden of maintenance management for the building based on the difference between the power charge during the execution period of the power saving plan and the power charge during the reference period when the power saving plan is not executed. When,
When the difference does not reach the target reduction amount, the first penalty point calculation unit that calculates the first penalty point that assists the cost burden of the maintenance management according to the unreached amount,
A building management device equipped with. The building management device according to claim 1.
Second penalty point calculation unit that calculates a second penalty point that assists the cost burden of the maintenance management based on the excess amount when the power charge in the execution period of the power saving plan exceeds the power charge in the reference period. A building management device equipped with. The building management device according to claim 2.
The first penalty point calculation unit calculates the first penalty point by multiplying the unachieved amount by the first conversion rate.
The second penalty point calculation unit calculates the second penalty point by multiplying the excess amount by a second conversion rate higher than the first conversion rate.
Building management equipment.