JP3976988B2 - Calculation method of power saving effect in energy saving driving support method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an energy saving service providing method, for example, an energy saving operation support method suitable for use in an energy saving operation performed in a factory or the like. Calculation method of power saving effect in Japan About.
[0002]
[Prior art]
At the Kyoto Conference on Global Warming Prevention in December 1997, Japan's global warming reduction target was set at 6% of the 1990 level. With this opportunity, the Law on the Rational Use of Energy (Energy Saving Law ) ”Was revised and entered into force in April 1999. Traditionally, large-scale factories were obliged to save energy (hereinafter referred to as energy conservation), but this amendment expanded the scope of the law to medium-scale factories.
On the other hand, for example, fans, blowers, pumps and the like are conventionally used in load facilities in factories and the like, and various motors are used for driving them. In order to save power consumption (energy saving) of various driving motors, inverters are often introduced. When an inverter was introduced to perform power-saving operation, the merit of the introduction was calculated, and the inverter was purchased or depended on a lease or rental method.
[0003]
[Problems to be solved by the invention]
However, in the conventional method, initial investment is difficult when purchasing an inverter, and in the lease or rental method, the lease or rental fee is high, and there is no energy saving effect. Even in such a case, payment must be continued during the contract period.
[0004]
Based on these examples, specific business schemes and problems will be described below.
[0005]
(A) Purchase scheme and problems
In the case of purchasing a combination of an inverter and a new motor, or purchasing an inverter alone, an initial investment is involved and the investment burden on the customer is large, and it is an investment before confirmation of achievement of power saving from the past.
[0006]
(B) Lease or rental scheme and problems
In a lease of an inverter and a new motor or an inverter alone, the user contracts to purchase the equipment or device within a certain period. Therefore, even if the user does not need the equipment or device, the user cannot cancel the contract or has a heavy burden.
In the case of rental, the user pays a rental fee to use the device or equipment, but this fee is usually higher than the lease fee.
The above-mentioned lease and rental scheme has a problem that a certain lease fee or rental fee must be contracted and paid before it is confirmed that power saving is achieved.
[0007]
The present invention has been made in view of the above problems, and a user who desires energy saving can receive a desired energy saving service without making any initial investment, and provides such an energy saving service. Energy-saving driving support method that can expect enough profit Calculation method of power saving effect in Japan The purpose is to provide.
[0008]
[Means for Solving the Problems]
In the present invention, the user wishes to save energy, and the person who provides the energy saving service improves or installs the user's equipment for energy saving. If the energy saving is achieved, the service is provided in consideration of the degree of energy saving. The benefit of energy saving is distributed between the user and the user. The degree of energy saving is power saving and the saved electricity charge.
[0009]
The present invention obtains the current power consumption of a target load facility of a user who owns the target load facility having a motor and desires to save energy, and introduces an inverter into the target load facility to perform a rotational speed control operation of the motor. The inverter control operation data at the time is calculated, the merit fee according to the power consumption is calculated based on the difference between the current power consumption data and the inverter control operation data, and the contract contents agreed in advance between the contractors Provide a method for providing energy-saving services that perform billing processing by reflecting merit fees.
[0010]
An apparatus according to an embodiment of the present invention includes a monitoring unit for monitoring an operation status provided in a target load facility including an inverter and a motor, and actual operation data based on a motor speed control operation by the inverter of the target load facility. Means for transmitting power from the monitoring unit via a communication system, an arithmetic device for calculating power savings depending on a difference between an estimated value of power consumption of a load facility not equipped with an inverter and inverter actual operation data, and And a processing device that calculates a merit fee based on a calculation result of the arithmetic device and reflects the merit fee in contents decided in advance between contractors, and performs a billing process.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
According to one embodiment of the present invention, a target load facility having a motor is owned, a current power consumption of a user who desires energy saving of the facility is obtained, and an inverter is introduced into the target load facility to control the rotational speed of the motor. The inverter control operation data at the time of operation is obtained, the merit fee according to the power consumption is calculated based on the difference between the current power consumption data and the inverter control operation data, and the contractor decides in advance. This is an energy saving service providing method for performing a billing process by reflecting the merit fee in the contract contents.
The method according to another embodiment of the present invention obtains the current power consumption from the operation status of the target load equipment having a motor, introduces an inverter into the target load equipment, and performs the motor speed control operation by the inverter. The inverter control operation data is obtained, the merit fee corresponding to the power saving is obtained based on the difference between the current power consumption data and the inverter control operation data, and the merit fee is determined according to the contract contents decided in advance by the contractor. The billing process is performed reflecting the above.
Still another method of the present invention obtains the current power consumption of an existing load facility equipped with a motor, introduces an inverter and a motor in place of the existing motor into the existing target load facility, and the number of rotations of the motor by the inverter Perform control operation to obtain the power consumption of the target load equipment, obtain the merit fee based on the current power consumption and the power consumption of the target load equipment including the inverter, and install the inverter of the target load equipment and the inverter in advance. A contract with the user including the distribution of the merit fee, and the power-saving data is sent to the data collection system via the communication system, and the user is charged to reflect the merit fee determined by the contract. Make a claim.
[0012]
The inverter control operation data is collected from the monitoring system via a communication means such as a LAN or a telephone line. The current power consumption data is operation data based on a current actual operation state or an assumed state of the target load facility.
Therefore, in the present invention, the user can achieve or contribute to the energy saving quota given by the government or the like without initial investment, and the service provider can easily obtain the energy saving benefit. That is, in the present invention, unlike the conventional lease or rental method, it is not necessary to guarantee the minimum energy saving amount for the user, and therefore the service provider does not necessarily have a merit according to the power consumption. You can receive a fee.
[0013]
Contractor B (energy-saving service provider or energy-saving equipment manufacturer) as one of the contracting parties introduces a combination of an inverter and a new motor, or a single inverter to the equipment of contractor A (customer, user) who wants to save energy. To do. In this case, if the service provider and the user agree, not only the inverter and motor, but also the pump, fan, blower, etc. used therewith can be replaced or replaced with new equipment.
The contractor A is a person who wants to receive the energy saving service, and the contractor B can be said to be a service provider that provides the energy saving service.
[0014]
First, the contractor B installs the operation status data collection system in the existing facility of the contractor A, and defines the characteristics before power saving by using the current operation status data in the existing facility. This is defined as the current power consumption. This characteristic becomes a contract condition before power saving. If the user does not have the equipment, the contract condition of the user is assumed based on the power consumption data of similar existing equipment owned by the service provider.
[0015]
The above operational status data collection system is a remote monitoring system that is constructed at the start of service using communication means such as a telephone line after collecting the operational data of the equipment and equipment after remodeling and replacing existing equipment and equipment. Functions as one component. Further, if necessary, data is transmitted to the monitoring system at a necessary interval. As a result, power consumption after improvement of equipment and facilities is required, and further, a merit fee is required.
[0016]
Contractor A (user) considers whether or not to receive an energy-saving service with an energy-saving service provider in consideration of the current power consumption, facilities, and merit fees required from the power-saving after equipment improvements. Contract to receive. If there is existing data of similar equipment without actually improving or replacing equipment or equipment, the service provider obtains the current power consumption and merit fee by calculation or approximate calculation, and contracts this. It is possible to propose to the user whether or not to assume the above.
The contract conditions include the cost of installing and replacing inverters and motors installed in existing facilities due to the power consumption merit, the fees paid by service providers to inverter and motor leasing and rental companies, maintenance costs, and data collection. Costs required can be considered. If the user and the service provider agree on these conditions, a power saving system introduction contract is concluded. When modifying or replacing this facility or equipment, the user does not need initial investment and is introduced after confirming or almost confirming that energy saving is achieved, so the user can achieve at least energy saving, Can even receive a distribution of merit fees.
[0017]
More specifically, a power-saving motor drive system introduction contract is signed, the power-saving amount is calculated using the remote monitoring system described above, and the power-saving motor drive system is used at a predetermined rate. Confirm the fee and make payment. “Usage fee” here is not “usage fee for the installed equipment”, but is defined as a merit fee equivalent amount that the contractor B receives by calculating the saving amount of the contractor A.
[0018]
When implementing this service, does the service provider use its own assets such as motors, inverters, data collection system equipment (hereinafter referred to as service equipment), which are power-saving motor drive system components? It goes without saying that it is possible to select whether to operate by using assets of a third party.
According to the embodiment of the present invention, the monitoring unit for monitoring the operating status provided in the target load facility including the inverter and the motor, and the actual operation data based on the rotational speed control operation of the motor by the inverter of the target load facility. Means for transmitting power from the monitoring unit via a communication system, an arithmetic device for calculating power savings depending on a difference between an estimated value of power consumption of a load facility not equipped with an inverter and inverter actual operation data, and An energy-saving service providing device is provided that includes a processing device that calculates a merit fee based on a calculation result of a computing device and reflects the merit fee in contents decided in advance by a contractor and performs a billing process. .
The apparatus according to another embodiment of the present invention includes a monitoring unit that monitors an operation status of a target load facility of a contract, and the inverter actual operation data based on a rotational speed control operation by an inverter provided in the target load facility. Means for collecting from the unit, an arithmetic device for calculating power savings depending on the difference between the current operation data and the actual inverter operation data, and an output circuit for outputting the result calculated by the arithmetic device to the LAN or telephone line A processing device that calculates a merit fee based on the output calculation result and reflects the merit fee in the contents decided in advance between the contractors It is characterized by having.
[0019]
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows a schematic concept of one embodiment of the present invention. The figure shows that the contractor A has a target load facility to be described later, makes a predetermined contract with the contractor B (a contract including the distribution of the merit fee), and the charge transfer is performed via the finance company. . Contracts concluded by the contractor A (user), the contractor B (service provider), and the finance company are indicated by arrows 14.
The target load equipment is equipment that has a fan or blower 1, pump 2, etc. used in factories as described above. These are not major production and manufacturing equipment, and are energy efficient despite high power consumption. It is also a part where measures are relatively delayed. In these facilities, various motors 3 and 4 are currently used as drive sources. Therefore, users often have a desire to save energy without investing as much as possible in these facilities and equipment.
[0020]
The service provider measures the current power consumption of the facility of the user who wishes to save energy, or corrects the power consumption in consideration of various fluctuation factors, and obtains the current power consumption of the facility. This data and calculation results are shown to the user.
Next, the service provider installs the inverter and a new motor as a set by the equipment inverter alone of the user who wishes to save energy. If the user wishes to upgrade the equipment, a new motor and inverter, fan, blower, etc. are installed as a set. Inverters 5 and 6 are connected to these motors 3 and 4 so that the number of revolutions of the motors 3 and 4 can be controlled by the inverters 5 and 6. Based on the current power consumption data of the existing motor of the contractor A collected by the monitoring unit 7, the characteristics before power saving are defined. This characteristic becomes a contract condition before power saving.
[0021]
The amount of power consumed by new equipment and devices by controlling the number of revolutions of the motors 3 and 4 by the inverters 5 and 6 is monitored by the monitoring unit 7 installed by the contractor B, and inverter control operation data as power consumption is obtained. Based on this operation data and the current power consumption, a merit fee (power saving amount) is required.
[0022]
The delivery of equipment such as the inverters 5 and 6 and the monitoring unit 7 is made by the contractor B, but the cost required for delivery of equipment in this case is not charged to the user. Based on the above, distribution of merit fees is examined between the user and the service provider. At this time, the cost of inverters, motors, fans, blowers, pumps, etc. (often lease or rental) installed by the service provider in the user's equipment is taken into consideration. In other words, it is reasonable to cover this cost in the merit fee, not the burden on the user.
[0023]
In addition to delivering the equipment, the service provider provides operation management and after-sales service for the inverters 5 and 6. These are indicated by arrows 11.
[0024]
The user enters into a contract with the service provider to introduce a power saving motor drive system including a merit fee for power saving brought about by controlling the rotation speed of the inverter.
[0025]
The inverter control operation data is taken into the remote monitoring system 20 of the contractor B as operation status data. This is indicated by arrow 13.
[0026]
The contractor B calculates a power saving amount by controlling the rotation speed of the inverter in the remote monitoring system 20, calculates and determines a power saving motor drive system usage fee at a predetermined rate, and performs a billing process. That is, the energy savings are shared by the contractors A and B according to a predetermined ratio (payback rate). However, in this contract, the energy saving amount of the limited target equipment (fans, blowers, pumps) varies depending on the operating status of the production line including the equipment, and cannot be guaranteed. For this reason, this contract does not share only “about the amount of energy saving exceeding a certain amount”, but it is based on the payback rate regardless of the amount of energy saving. In the present invention, the distribution of the merit fee to the service provider may be larger than that of the contractor A, and in some cases, the merit fee allocation to the contractor A may be zero.
[0027]
The obtained merit fee is notified to the contractor A from the contractor B. This is indicated by arrow 12. This billing process may be performed using a financial institution such as a finance company that is often used for payment of money as shown in the figure. In this case, as shown by an arrow 14, a contract for mediation is also concluded between the contractor A and the finance company. The merit notice is also sent from the contractor B to the finance company. This is indicated by arrow 15.
The contractor B may sell the motor and inverter manufactured in-house to a finance company, lease it to the contractor B, and the contractor B may install the motor and inverter in the contractor A.
[0028]
Based on the merit notification, the contractor A pays the merit fee through the finance company to the contractor B. This is indicated by arrows 16 and 17. The fee collection business is not limited to a finance company, and a financial institution such as a bank, a post office, a convenience store, or the like may be used.
[0029]
In the case of a contract in which the contractor A is directly made with the contractor B, the contract is as shown in FIG. 2, but is substantially the same as FIG. 1, and will not be described repeatedly.
[0030]
Service equipment such as a motor, an inverter, and a monitoring unit is installed in the contractor A's factory without initial investment, either owned by the contractor B, or leased or rented by the contractor. Installation work costs, contractor A equipment remodeling costs, etc. may be determined separately.
[0031]
The contractor A operates the target load facility with the rotational speed control suitable for operation. FIG. 3 shows a method for collecting power consumption before power saving.
[0032]
In FIG. 3, a drive motor (IM) 32 is connected to the target load facility 31 on the system 30 and is provided on a line connected to the motor 32. Current transformer (CT) 33, Transformer (VT) 34 By ammeter and voltmeter connected to Current and voltage are measured. Further, a load such as a flow rate and pressure is detected from the target load facility 31. These measured signals and detected signals are transmitted to the monitoring unit 25 (monitoring system 24) of the operation status data collection system 22. The current operation data is calculated based on the collected and statistical data in this way, and the result is transmitted to the computing device (PC) 26.
[0033]
The above-described operation status data collection system 22 collects and statistics the operation status of the target load facility 31 as current operation data, and collects and statistics inverter actual operation data during the rotation speed control operation by the inverter. The current operation data is operation data based on the current actual operation status of the target load facility 31 or the current assumed status.
[0034]
The operation status data collection system 22 includes a monitoring system 24 (including a monitoring unit 25) that collects inverter actual operation data, a computing device (PC) 26 that statistically analyzes the monitoring system 24, and a contractor B with the accumulated electric energy. A communication system 27 for communication.
[0035]
The calculated result is transmitted to the contractor B by e-mail via the communication system 27, for example, the modem 35 or the LAN 36 of the contractor A. This automatic transmission is sufficient once / day, but may be performed every moment. This information collection is performed using a remote monitoring system 20 of the contractor B as shown in FIG. 1 or FIG.
[0036]
The current operation data is transmitted to the data processing device 21 in the remote monitoring system 20 and stored in the storage device 23.
[0037]
FIG. 4 shows a method of collecting actual operation data (inverter actual operation data) when rotation control is performed with the inverter INV provided in the system. The same components as those in FIG. 3 are denoted by the same reference numerals and will not be described repeatedly.
[0038]
In the example shown in FIG. 4, inverters (INV) 5 and 6 are provided on the system 30, and upstream of the inverters 5 and 6. Current transformer for measurement 33, Measuring transformer There are 34. Downstream of inverters 5 and 6 Current transformer for measurement 43, Measuring transformer 44 is newly provided.
[0039]
Ammeter and voltmeter Is transmitted to the monitoring unit 25 of the monitoring system 24. Further, the load such as the flow rate and pressure of the target load facility 31 is also transmitted to the monitoring unit 25 in the same manner. In this case, the temperature and vibration of the target load facility 31 may also be detected and transmitted to the monitoring unit 25. This detected value is used for later maintenance.
[0040]
The power consumption is integrated based on actual operation data collection, statistics, or calculation. The accumulated result is transmitted to the contractor B by the communication system 27. This automatic transmission is sufficient once / day, but may be performed every moment.
[0041]
This information collection is performed using a remote monitoring system 20 of the contractor B as shown in FIG. 1 or FIG. The collected actual operation data is stored in the storage device 23 of the remote monitoring system 20.
[0042]
Based on the transmitted operation data, that is, the amount of power, the data processing device 21 possessed by the contractor B can immediately calculate the power saving amount and further the reduced merit fee. The same result can be obtained by installing the storage device 23 in the operation status data collection system 22 and transmitting the result to the data processing device 21. The calculation result is notified to the contractor A. In addition, the merit fee may be calculated by the operating status data collection system 22. In order to transfer the merit fee calculation result and the two operation data to the contractor B, it is desirable in terms of system configuration that the remote monitoring system 20 is used. As a result, operation management by the remote monitoring system 20 is performed.
[0043]
FIG. 5 shows an example of power consumption characteristics when a blower is adopted for the target load facility 31. In the figure, the characteristic (1) shows the relationship of the power consumption (%) to the air volume (%) in the case of the current suction damper control. This characteristic (1) is defined as the collected current operation status data, and is adopted as the contract condition.
[0044]
Characteristic (2) shows the relationship of power consumption (%) to air volume (%) when the rotational speed control by the inverter is adopted instead of the suction damper control. This characteristic (2) is the actual operation data during the rotational speed control operation by the inverter. Power saving by subtracting characteristic (2) from characteristic (1) Power Calculated.
[0045]
Although the blower has been described in the above example, the power saving amount can be calculated in the same manner for other fans and pumps.
[0046]
As described above, the operating status data collection system 22 measures the parameters (eg, air volume, flow rate, etc.) indicating the operating status of the equipment and the power consumption at that time. A contract condition curve before power saving shown in FIG. 6 is created from the measurement result, and is defined as the contract condition. FIG. 6 shows the relationship between the air volume (%) and the power KW, which is an example of contract conditions before power saving.
[0047]
FIG. 7 shows a calculation example of the power saving effect. The remote monitoring system 20 measures parameters (eg, air volume, flow rate, etc.) indicating the equipment operation status and power consumption at that time. Using the measurement result and the contract condition curve before power saving at the time of contract, the power saving effect is calculated as shown in FIG. The figure shows the integrated power amount KWh for each time. In the figure, the integrated power consumption before power saving calculated from the curve at the time of contract is statistically analyzed, and then the integrated power consumption during the power saving is calculated every moment. Find the power saving effect of minutes.
[0048]
The energy saving effect, that is, the merit fee is calculated by multiplying the amount of energy per unit from the amount of energy saved, and the merit fee is reflected in the contract contents agreed between the contractors A and B and, in some cases, the finance company. Perform billing process. From the viewpoint of the contractor A, this is a process for charging a fee.
[0049]
The contractor B is paid as a return merit for, for example, half of the power saving merit of the newly introduced facility operation. In other words, it becomes postpay merit fee after realizing the energy saving effect. The power saving merit is calculated by the contractor B from the actual operation data according to the contents decided in advance between the contractors, and notified to the contractor A every month. Regarding the operation data, the contractor B may confirm the data before the contractor B performs the billing process.
In this way, the billing process based on the merit fee is performed. The maintenance may be performed by the contractor B free of charge, and the daily inspection may be performed by the contractor A.
[0050]
FIG. 8 shows a flowchart for billing. As shown in the figure, the flow for billing processing is pre-investigated by marketing (S1), the application data of the contractor A is obtained, and the service provision from the contractor A to the contractor B is made ( S2). The profitability is examined by the site survey of the contractor A (S3). Current operating status data is collected and operating status data is collected (S4). This data collection is performed, for example, for two months, whereby data analysis, final profit examination, and contract condition presentation are performed (S5). Then, the equipment use contract is concluded (S6), and hardware installation is performed by hardware input of equipment such as a motor / inverter (S7) (S8). The installed hardware is operated, and other operating status data is collected by collecting actual operating data (S9). Merit calculation, merit notification, and billing process are performed based on the obtained operating status data (S10). Thereafter, after-sales service is performed (S11).
[0051]
According to such a present Example, the merit of the contractor A (user) is as follows.
(1) Energy saving of electric power equipment having a motor can be achieved.
(2) Energy can be saved without initial investment.
(3) A contract can be made after confirming the power consumption effect, and there is no useless investment.
(4) Power-saving operation is possible, and equipment costs can be saved.
[0052]
On the other hand, the merits of the contractor B (service provider) are as follows.
(1) Profits from merit fees can be secured.
(2) A new market for motors and inverters can be created.
(3) By adopting the remote system, it is possible to facilitate the operation management of the contractor A and reduce the management cost.
[0053]
【The invention's effect】
According to the energy saving service providing method and apparatus of the present invention described above, the initial investment for the user is unnecessary, the required energy saving can be achieved, and the service provider distributes the merit fee generated by the energy saving. Can receive.
[Brief description of the drawings]
FIG. 1 is a conceptual diagram of a configuration of an embodiment of the present invention.
FIG. 2 is a conceptual diagram of the configuration of another embodiment of the present invention.
FIG. 3 is a block diagram showing an embodiment for carrying out the present invention.
FIG. 4 is a block diagram showing another embodiment when the present invention is implemented.
FIG. 5 is a diagram showing an example of power consumption characteristics of a blower.
FIG. 6 is a diagram showing the relationship between air volume and power used as an example of contract conditions before power saving.
FIG. 7 is a diagram showing a calculation example of a power saving effect.
FIG. 8 is a flowchart showing a method according to an embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Fan, blower, 2 ... Pump, 3, 4 ... Motor, 5, 6 ... Inverter, 7 ... Monitoring unit, 11, 12, 13, 14, 15, 16, 17 ... Arrow, 20 ... Remote monitoring system, 21 DESCRIPTION OF SYMBOLS ... Data processing device, 22 ... Operational status data collection system, 23 ... Storage device, 24 ... Monitoring system, 25 ... Monitoring unit, 26 ... Computing device, 27 ... Communication system, 31 ... Target load equipment, 33 ... Ammeter, 34 ... Voltmeter, 35 ... Modem, 36 ... LAN.

Claims (1)

Current flow provided in a system for supplying power to the fan, blower or pump, the drive motor connected to the fan, blower or pump, and the drive motor on the customer side where support service for energy saving operation is provided And a transformer, an ammeter and a voltmeter connected to the current transformer and the transformer to measure the current and voltage of the system, a detection means for detecting the air volume or flow rate of the fan, blower or pump, and energy saving An inverter that is introduced by a service provider that provides driving support services and controls the rotational speed of the drive motor; an operation status data collection system that includes a storage device and a computing device; and a remote monitoring system that includes a data processing device; In the calculation method of the power saving effect in the energy saving driving support method in the system consisting of
The fan, blower or pump data detected by the detecting means before the inverter is introduced in advance or the flow rate data, and the drive measured in advance by the operation unit of the operation status data collection system before the inverter is introduced. A contract in which the relationship between the air volume data or the flow rate data and the power consumption data before the introduction of the inverter is negotiated between the customer and the service provider based on the momentary power consumption data of the motor It is stored in the storage device as a condition curve,
The稼work condition data acquisition system receives the signal of the current meter and signals and voltages measured current with a voltmeter when the control rotation speed using an inverter to the drive motor
The arithmetic unit稼work condition data acquisition system, from said signal and the voltage signal of the inverter after the introduction of the current, measuring the data of the power consumption of every moment of the drive motor after the inverter introducing the operating status data collection system sends a data of the measured power consumption to the remote monitoring system,
The operational status data acquisition system, the air flow of data or flow data every moment as detected parameters by the detecting means when measuring the power consumption of every moment after the inverter introduced into the remote monitoring system transmitted,
The remote monitoring system receives the air volume data or the flow volume data detected every moment during the rotation speed control after the inverter introduction,
Wherein the data processing unit of the remote monitoring system, using the relationship between the terms curve as the storage device to the stored inverter before introduction of the air volume of data or flow data and the power consumption of the data, after the inverter introduced The power consumption before the introduction of the inverter with respect to the air volume or flow rate detected every moment during the rotation speed control of
The remote monitoring system receives the measured power consumption data from time to time after the introduction of the inverter,
The data processing apparatus calculates the accumulated power consumption before the inverter introduction obtained by integrating the power consumption every moment before the inverter introduction calculated using the contract condition curve, and the measured inverter introduction Calculate the power savings from the difference from the cumulative power consumption after the introduction of the inverter, which is obtained by integrating the power consumption from moment to moment, and save from the calculated power savings and power charges per unit power amount. A method for calculating a power saving effect in an energy saving operation support method, characterized in that a calculated power rate is calculated.

Images