TWI445966B - Power monitoring device, power monitoring system, power monitoring method, control program product and recording medium - Google Patents

Description

Power monitoring device, power monitoring system, power monitoring method, control program product, and recording medium

The present invention relates to a power monitoring device, a power monitoring system, a power monitoring method, a control program product, and a recording medium that monitor the amount of electricity used by a plurality of electrical devices and/or electrical device groups included in a predetermined monitoring range.

Typically, power companies set basic fees based on demand for customers using high-voltage power. Therefore, in order to reduce costs, customers such as enterprises will monitor the demand so that the cumulative use of electricity during the demand period (usually 30 minutes) does not exceed the target demand (management demand). Therefore, various types of demand monitoring systems for demand monitoring have been developed.

For example, a conventional demand monitoring system calculates a power usage amount based on a metering pulse of a billing meter, and alerts the user before the management demand is exceeded, thereby prompting the user to suppress the power usage.

Further, for example, Patent Document 1 describes a demand monitoring system that selects the amount of electricity used according to the metering pulse, the amount of electricity used measured on the high pressure side, or the amount of electricity used measured on the low pressure side (secondary side). Either to perform demand monitoring.

[Previous Technical Literature] [Patent Literature]

[Patent Document 1]: Japanese Patent No. 3603876 (published on December 22, 2004)

However, the conventional technique as described above is a method of determining whether or not the amount of used electricity exceeds a threshold value by comparing the amount of used electric power in the demand contract with a predetermined threshold value. Therefore, since the usage patterns and characteristics (for example, rated power, etc.) of each electric equipment in the power-demand contract are not considered, there is a problem that high-precision determination cannot be performed.

The present invention has been made in view of the above problems, and an object of the invention is to provide a method for determining whether or not a plurality of electrical devices included in a monitoring range exceed the usage amount of a plurality of electrical devices included in the monitoring range. Power monitoring device, power monitoring system, power monitoring method, control program product, and recording medium.

In order to solve the above problems, the present invention provides a power quantity monitoring device for monitoring power usage of a plurality of electrical devices included in a monitoring range, characterized in that it is provided with: statistical means for classifying the plurality of electrical devices as a plurality of statistical units, and separately counting, for each of the statistical units, the used electric quantity of the electrical equipment; the alarm level difference calculating means, respectively calculating, for each of the statistical units, the used electric quantity calculated by the statistical unit, and for each of the The difference between the alarm level values determined in advance by the statistical unit is the alarm level difference; the alarm judgment value calculation means calculates the hand based on the above alarm level difference The alarm level value is calculated by calculating the alarm level difference of each statistical unit in the segment; the determining means determines whether the alarm determination value calculated by the alarm determination value calculation means has exceeded a predetermined alarm threshold value; and the output means determines the judgment means When the alarm determination value exceeds the above-described alarm threshold, the alarm information indicating that the amount of power used in the monitoring range has exceeded is output.

In addition, in order to solve the above problems, the present invention provides a power monitoring method for monitoring power usage of a plurality of electrical devices included in a monitoring range, characterized in that it includes: a statistical step of classifying the plurality of electrical devices into a plurality of statistical units, and separately counting, for each of the statistical units, the used electric quantity of the electrical equipment; an alarm level difference calculating step, which calculates, for each of the above statistical units, the used electric quantity calculated in the statistical step, and each The difference between the alarm level values determined in advance by the statistical unit; the alarm determination value calculating step of calculating the alarm determination value, that is, the alarm level, based on the alarm level difference of each statistical unit calculated in the alarm level difference calculation step a determination step of determining whether the alarm determination value calculated in the alarm determination value calculation step has exceeded a predetermined alarm threshold value; and an outputting step of determining, in the determining step, that the alarm determination value has exceeded the alarm threshold value Next, the output is used to indicate that the power used in the monitoring range has exceeded The alarm information.

According to the above configuration, the statistical means classifies the plurality of electrical devices included in the monitoring range into a plurality of statistical units, and counts the used electric power for each statistical unit. In addition, the above alarm level difference calculation means is for each of the above statistics Unit, calculating the difference between the used electric quantity calculated by the above statistical means and the alarm level value determined in advance for each of the statistical units, that is, the alarm level difference, and the judging means will judge the value and the alarm threshold according to the alarm level difference Compare to determine if the amount of electricity used in the monitored range has exceeded. Further, when the used power has been exceeded, the alarm information indicating that the used power has been exceeded is output to the notification device, and the notification device is notified to the user of the alarm content indicated by the alarm information, so that the user can know the monitoring. The electrical equipment used in the range has been used.

In this way, the alarm determination value is based on the difference between the used power amount of each statistical unit and the alarm level value determined in advance for each of the statistical units. Therefore, compared with the case where it is judged whether or not the amount of electric power used by the plurality of electric devices included in the monitoring range has exceeded a predetermined value, the present invention can reflect, for example, the usage pattern and characteristics of the electric equipment of each statistical unit, thereby judging the monitoring range. Whether the power used by multiple electrical devices has been exceeded. Therefore, it is possible to realize an effect of notifying the user of the alarm content determined with high precision.

Further, preferably, the electric quantity monitoring device according to the present invention further includes a contribution degree calculation means for calculating, for each of the statistical units, a ratio of an alarm level difference of the statistical unit to the alarm determination value, that is, a contribution When the determination means determines that the alarm determination value has exceeded the alarm threshold value, the output means contributes the electric equipment included in the statistical unit indicating the highest contribution degree to the alarm determination value The information is added to the alarm information and output.

According to the above configuration, the output means adds the information on the electric device included in the statistical unit indicating the highest contribution degree to the alarm information, and outputs the information to the alarm information. Therefore, the notification device that has received the alarm information notifies the user of the alarm content indicated by the alarm information, and causes the user to know which electric device is used when the electric power consumption of the electric device included in the monitoring range is exceeded. It can most effectively reduce the amount of electricity used by electrical equipment included in the monitoring range. Therefore, the user can easily take an action of reducing the amount of power used.

Further, preferably, the electric quantity monitoring device of the present invention further includes an influence degree determining means for determining, for each of the statistical units, an electric device included in the statistical unit for all electric appliances included in the monitoring range. In the degree of influence of the device, the alarm determination value calculation means calculates the alarm determination value by summing the results obtained by multiplying the alarm level difference of each statistical unit calculated by the alarm level difference calculation means by the influence degree.

According to the above configuration, the alarm determination value calculation means calculates the alarm determination value by totaling the results obtained by multiplying the alarm level difference of each statistical unit by the influence degree of the electric equipment included in each statistical unit. Therefore, the characteristics and the like of the electrical equipment included in the statistical unit can be further reflected on the alarm determination value. Thereby, it is possible to more accurately determine whether or not the amount of used electricity has exceeded.

Further, in the electric quantity monitoring device of the present invention, the determination means determines that the alarm determination value calculated by the alarm determination value calculation means is multiplied Whether the value obtained by the time coefficient has exceeded the above-mentioned alarm threshold, which is a positive relationship with the elapsed time from the start of the monitoring period.

The electric power monitoring device of the present invention monitors the amount of electric power used by a plurality of electric devices included in the monitoring range so as not to exceed a predetermined target upper limit electric quantity such as a management demand within a predetermined monitoring period. Therefore, the longer the elapsed time from the start of the monitoring period, the more difficult it is to suppress the amount of power used below the target upper limit.

According to the above configuration, the determination means determines whether or not the value obtained by multiplying the alarm determination value by the time coefficient has exceeded the alarm threshold, and the time coefficient is in a positive relationship with the elapsed time from the start of the monitoring period. That is, since the value of the time coefficient increases as the elapsed time becomes longer, in the case where a long time has elapsed from the start of the monitoring period, even if the alarm judgment value is small, there is a case where the alarm threshold is exceeded. On the other hand, in the period immediately after the monitoring period, even when the alarm determination value is large, there is a case where the alarm threshold is not exceeded.

Therefore, it is possible to consider an alarm to be notified to the user based on the difficulty corresponding to the elapsed time.

Further, in the electric quantity monitoring device of the present invention, the determination means determines whether the alarm determination value exceeds the alarm threshold value according to the target upper limit electric quantity and the total influence degree, and the target upper limit electric quantity is for the monitoring range Including all electrical equipment and determining in advance, the total influence degree is to combine the influence degree of each statistical unit determined by the above-mentioned influence degree determining means. Calculated by the person.

According to the above configuration, the alarm threshold value is a total influence degree obtained by totaling the target upper limit electric quantity determined in advance for all the electric devices included in the monitoring range and the influence degree of each statistical unit determined by the influence degree determining means. .

Here, in the case where the statistical means does not count the amount of electric power used by all the electric devices included in the monitoring range, but the electric power consumption of a part of the electric equipment included in the monitoring range is counted, the alarm determination value is based on the part. Electrical equipment.

Therefore, the alarm threshold value, which is the object of comparison of the alarm determination value, is also set based on the electrical equipment counted by the statistical means, and even when the power consumption of a part of the electrical equipment included in the monitoring range is counted, It is judged with high accuracy whether or not the amount of electricity used in the electrical equipment included in the above monitoring range has exceeded.

Further, preferably, the electric quantity monitoring system of the present invention includes: the electric quantity monitoring device; and a measuring device that measures a used electric quantity of the electric device, and outputs the measured electric quantity of the electric device to the electric quantity monitoring device.

Further, preferably, the electric quantity monitoring system of the present invention includes: the electric quantity monitoring apparatus; and the notification apparatus that receives the alarm information output by the output means and notifies the user of the alarm content indicated by the received alarm information.

According to the above configuration, the above-described electric quantity monitoring system can realize the above-described electric quantity monitoring The device has the same effect.

Further, the above-described electric quantity monitoring device can be realized by a computer. In this case, by operating the computer as each means of the electric quantity monitoring device, the control program of the electric quantity monitoring device can be realized by a computer, and the recording can be realized. A recording medium that controls a program and can be read by a computer is also within the scope of the present invention.

As described above, the electric power monitoring device of the present invention is configured to include statistical means for classifying the plurality of electric devices into a plurality of statistical units, and separately counting the electric power usage of the electric device for each of the statistical units; a difference calculation means for calculating, for each of the above statistical units, a difference between an amount of used electricity calculated by the statistical unit and an alarm level value determined in advance for each of the statistical units, that is, an alarm level difference; a method for calculating an alarm determination value based on an alarm level difference of each statistical unit calculated by the alarm level difference calculation means; and determining means for determining whether the alarm determination value calculated by the alarm determination value calculation means has exceeded a predetermined alarm threshold; The output means outputs, when the determination means determines that the alarm determination value has exceeded the alarm threshold value, alarm information indicating that the amount of power used in the monitoring range has exceeded.

In addition, the power monitoring method of the present invention includes: a statistical step of classifying the plurality of electrical devices into a plurality of statistical units, and separately counting the used power of the electrical device for each of the statistical units; And calculating, for each of the above statistical units, a difference between the used electricity quantity counted in the statistical step and the alarm level value determined in advance for each of the statistical units, that is, an alarm level difference; a step of calculating an alarm determination value based on an alarm level difference of each statistical unit calculated in the alarm level difference calculation step, and a determination step of determining whether the alarm determination value calculated in the alarm determination value calculation step has exceeded a predetermined value An alarm threshold; an output step of outputting, when the alarm determination value exceeds the alarm threshold value in the determining step, outputting alarm information indicating that the amount of power used in the monitoring range has exceeded.

Therefore, compared with the case where it is judged whether or not the amount of electric power used by the plurality of electric devices included in the monitoring range has exceeded a predetermined value, the present invention can reflect, for example, the usage pattern and characteristics of the electric equipment of each statistical unit, thereby judging the monitoring range. Whether the power used by multiple electrical devices has been exceeded. Therefore, it is possible to realize an effect of notifying the user of the alarm content determined with high precision.

An embodiment of the present invention will be described below with reference to Figs. 1 to 6 .

(Composition of the electricity monitoring system)

First, the electric power monitoring system of the present embodiment will be described with reference to Fig. 2 . FIG. 2 is a view showing an example of the outline of the electric quantity monitoring system 100 of the present embodiment. As shown in FIG. 2, the electricity quantity monitoring system 100 includes a power quantity monitoring device 1, buildings 2a, 2b provided with electrical equipment, a display device 9, and a terminal device 10.

The electricity amount monitoring device 1 monitors the amount of electricity used by a plurality of electrical devices included in the monitoring range. In the present embodiment, the monitoring range is set to be within the site of the contract with the electric power company, and the buildings 2a and 2b are built in the site. That is, the electrical equipment included in the monitoring range refers to the electrical equipment included in the buildings 2a and 2b.

However, the monitoring range of the power quantity monitoring device 1 is not limited to the range of the site in which the contract with the power company is contracted. For example, the monitoring range may be set to be within the building 2a (the entire building 2a) or may be set as a part of the building 2a. Alternatively, the monitoring range may be set to include a range of a plurality of points in the head office. In addition, the monitoring range may be set to include not only the head office but also the range of related companies such as subsidiaries.

In other words, the monitoring range of the power quantity monitoring device 1 is not limited to the unit of the contract with the power company, and the range can be arbitrarily set as long as it is a range including a plurality of electric devices.

In other words, the power quantity monitoring device 1 of the present invention is not limited to demand monitoring, and can be used as a battery for monitoring the amount of electricity used in a plurality of electrical devices included in a predetermined range. The detailed configuration and processing of the power quantity monitoring device 1 will be described later.

In the buildings 2a and 2b, there are respectively provided: electric meters (measuring devices) 3a, 3b, which are provided by the electric power company for calculating the electricity bill; transformers 4a1, 4a2, 4a3, 4b1, 4b2, 4b3, etc. by the electric power company Provided, the electric power supplied from the electric power company is transformed; the production equipment 6a, 6b, the air-conditioning equipments 7a, 7b, and the electric lamps 8a, 8b, etc. are electrical equipment.

Further, in the following, when the buildings 2a and 2b are not distinguished, the buildings 2a and 2b are collectively referred to as the building 2. Further, when the meters 3a and 3b are not distinguished, the meters 3a and 3b are collectively referred to as an electric meter 3. Further, when the transformers 4a1, 4a2, 4a3, 4b1, 4b2, 4b3 are not distinguished, the transformers 4a1, 4a2, 4a3, 4b1, 4b2, 4b3 are collectively referred to as the transformer 4. In addition, the production apparatuses 6a, 6b are collectively referred to as the production apparatus 6 without distinguishing the production apparatuses 6a, 6b. Further, in the case where the air conditioners 7a, 7b are not distinguished, the air conditioners 7a, 7b are collectively referred to as the air conditioner 7. Further, in the case where the electric lamps 8a, 8b are not distinguished, the electric lamps 8a, 8b are collectively referred to as the electric lamp 8.

The building 2a, 2b is provided with three transformers 4, respectively. Each of the electrical devices is connected to the transformer 4, and electric power is supplied to each of the electrical devices via the transformer 4. Current meters 5a1, 5a2, 5a3, 5b1, 5b2, and 5b3 are provided between the respective electrical devices and the transformer 4. In the following, when the ammeters 5a1, 5a2, 5a3, 5b1, 5b2, and 5b3 are not distinguished, the ammeters 5a1, 5a2, 5a3, 5b1, 5b2, and 5b3 are collectively referred to as an ammeter 5.

An ammeter (measuring device) 5 is used to measure the amount of electricity used by the electrical equipment connected to each transformer 4. The ammeter 5 is connected to the power quantity monitoring device 1 by means of wireless communication means or wired communication means, and transmits information of the measured power usage amount to the power quantity monitoring device 1.

The production equipment 6 is an actor who is electrically (electric) and is a device directly related to the production activities of the product. The production equipment 6 is, for example, a machine/device type, a work/fixture type, a handling/storage facility, etc., by one or more electrical equipment Composition. Further, a production device composed of a plurality of electrical devices is also referred to as an electrical device group.

In the present embodiment, the electric equipment installed in the building 2 is exemplified by the production equipment 6, the air conditioner 7, and the electric lamp 8, but the invention is not limited thereto. The electric equipment installed in the building 2 can be arbitrarily set as long as it is an electric actuator.

Further, in the present embodiment, although one electric device or one electric device group is connected to one transformer 4, it is not limited thereto. It is possible to connect a plurality of electrical devices with respect to one transformer 4, or to connect a plurality of electrical device groups, or to connect electrical devices and electrical device groups.

Further, in the present embodiment, although three transformers 4 are provided in the building 2, the number of the transformers 4 may be arbitrary.

Further, in the present embodiment, the ammeter 5 is provided between the transformer 4 and the electric device, but the present invention is not limited thereto. For example, an ammeter 5 can also be provided between the transformer 4 and the meter 3.

In addition, in the case of connecting a plurality of electrical equipment and/or electrical equipment groups to the transformer 4, an galvanometer 5 may be provided with respect to one electrical equipment or electrical equipment group to measure the use of each electrical equipment or electrical equipment group. Electricity.

Further, the electric quantity monitoring device 1 may not directly set the electric power consumption, and the electric power monitoring device 1 may directly obtain the electric power consumption from the electric meter 3.

The display device 9 receives the alarm information from the power amount monitoring device 1 to display an alarm content indicating the alarm information. The display device 9 is only required to be electrically The indicator of the amount monitoring device 1 may display an image. For example, an LCD (Liquid Crystal Display), an organic EL (Electro Luminescence) display, a plasma display, or the like can be applied.

The terminal device 10 receives the alarm information from the power quantity monitoring device 1 to notify the user of the alarm content indicating the alarm information. The terminal device 10 is, for example, a PC (Personal Computer), a mobile phone, a PDA (Personal Digital Assistant), or the like.

The display device 9 and the terminal device 10 are connected to the power quantity monitoring device 1 by means of wireless communication means or wired communication means.

In other words, the display device 9 and the terminal device 10 are notification devices for notifying the user of the electric power monitoring device 1 or the like. In the present invention, the power monitoring system 100 only needs to have at least one notification device. Further, the display device 9 or the terminal device 10 may be integrated with the power source monitoring device 1.

Further, the notification device may be a sound output device such as a speaker that notifies an alarm or the like by sound. In addition, the notification device may be a light-emitting device such as a "PATLITE" warning light (registered trademark) or an LED (Light Emitting Diode) that notifies an alarm or the like by light. As described above, the notification device can be any device that can notify the user of an alarm or the like, and can apply a known device.

(Configuration of the electricity quantity monitoring device)

FIG. 1 is a block diagram showing an example of a configuration of a main part of the electricity quantity monitoring device 1. As shown in FIG. 1 , the power quantity monitoring device 1 includes a control unit 11 , The storage unit 12, the data input unit 13, the operation unit 14, and the communication unit 15.

The data input unit 13 is configured to acquire an interface for using electric power from each galvanometer 5. As described above, the data input unit 13 and each of the ammeters 5 are connected by a wireless communication means or a wired communication means. Further, as described above, when the ammeter 5 is not provided, the data input unit 13 acquires the amount of used electric power from the electric meter 3.

The operation unit 14 is configured to cause the user to input an instruction signal to the power quantity monitoring device 1 to operate the power quantity monitoring device 1. The operation unit 14 may be constituted by an input device such as a keyboard, a mouse, a keypad, an operation button, or the like. Further, when the power source monitoring device 1 is provided with the display device 9, the operation unit 14 and the display device 9 may be integrated touch panels. Further, the operation unit 14 may be a remote control device such as a remote controller that is separate from the power quantity monitoring device 1.

The communication unit 15 performs communication with the display device 9 and other devices (notification devices) such as the user's terminal device 10 by means of wireless communication means or wired communication means, and performs data processing in accordance with an instruction from the control unit 11. .

The storage unit 12 is configured to store programs, data, and the like referred to by the control unit 11, and includes, for example, statistical unit information 31, alarm level value information 32, influence information 33, alarm threshold information 34, time coefficient information 35, and the like. Details of the statistical unit information 31, the alarm level value information 32, the influence degree information 33, the alarm threshold information 34, and the time coefficient information 35 will be described later.

The control unit 11 performs various calculations by executing a program read from the storage unit 12 to a temporary storage unit (not shown), and collectively controls image processing. Parts of the device 1.

In the present embodiment, the control unit 11 is configured to include a data acquisition unit 21 as a function module, a data statistics unit (statistical means) 22, an alarm level difference calculation unit (alarm level difference calculation means) 23, and an alarm determination value. The calculation unit (alarm determination value calculation means, influence degree determination means) 24, the determination unit (determination means) 25, the contribution degree calculation unit (contribution degree calculation means) 26, the alarm signal transmission unit (output means) 27, and the data setting section 28 . Reading a program stored in a storage device realized by a ROM (read only memory) or the like to a RAM (random access memory) by a CPU (central processing unit) The implemented temporary storage unit executes the program to implement the respective functional modules (21 to 28) of the control unit 11 described above.

The data acquisition unit 21 acquires the amount of electricity used by each electric device from the ammeter 5 via the data input unit 13. The data acquisition unit 21 outputs the acquired electric power consumption of each electric device to the material statistical unit 22.

The data statistic unit 22 acquires the amount of electric power used by each electric device from the data acquisition unit 21, and reads the statistical unit information 31 from the storage unit 12. Then, the data statistic unit 22 counts, for each statistical unit indicated by the statistical unit information 31, the cumulative use amount of electric power from the monitoring cycle start time point to the current time point at a predetermined monitoring interval. The data statistic unit 22 outputs the accumulated used electric energy calculated for each statistical unit to the alarm level difference calculation unit 23.

Here, the monitoring period is a period (period) in which the electric quantity monitoring device 1 monitors the electric quantity. In other words, the monitoring period is used to determine the start time and end time of the cumulative used power amount counted by the data statistic unit 22. In the present embodiment, the virtual power amount monitoring device 1 performs demand monitoring. Therefore, the monitoring cycle is a demand cycle (30 minutes), but is not limited thereto. For example, the monitoring period can be set to one minute, one hour, one day, or one year, and the monitoring period can be arbitrarily set.

In addition, the monitoring interval means that the electric quantity monitoring device 1 determines whether or not the electric power used by the plurality of electric devices included in the monitoring range exceeds the interval during the monitoring period. In other words, the monitoring interval means that the data statistic unit 22 counts the interval at which the accumulated power is used. The monitoring interval may be any shorter than the monitoring period. In the present embodiment, the monitoring interval is set to one minute, and the data statistic unit 22 counts the accumulated power usage for each statistical unit every one minute.

In addition, the unit of the statistical unit system that accumulates the amount of used electricity is a unit including at least one electrical device included in the monitoring range. In the present embodiment, the system counts the entire building 2. That is, in the present embodiment, the production equipment 6a, the air conditioner 7a, and the electric lamp 8a are used as one statistical unit, and the production equipment 6b, the air conditioner 7b, and the electric lamp 8b are used as one statistical unit, and the data statistics unit 22 is a system for producing the equipment 6a. The accumulated electric power used by the air conditioner 7a and the electric lamp 8a and the cumulative electric power used by the production equipment 6b, the air conditioner 7b, and the electric lamp 8b.

However, the statistical unit is not limited to this, and the electrical equipment measured by one galvanometer 5 can be used as a statistical unit, or each electrical equipment or electrical equipment group can be used as a statistical unit, or the power contract unit can be used as a statistical unit. . In the present invention, it is sufficient to classify a plurality of electrical devices included in the monitoring range into a plurality of statistical units, regardless of the statistical unit.

The alarm level difference calculation unit 23 acquires the accumulated usage power amount for each statistical unit from the material statistics unit 22, and reads the alarm level value information 32 from the storage unit 12. Further, the alarm level difference calculation unit 23 calculates the cumulative used power amount counted by the data statistic unit 22 for each statistical unit, and the alarm level value of the current time point of the statistical unit indicated by the alarm level value information 32. The difference is the difference in alert level. The alarm level difference calculation unit 23 outputs the alarm level difference for each of the calculated statistical units to the alarm determination value calculation unit 24.

Here, the alarm level value refers to a reference value for evaluating the amount of electric power used in the electrical equipment included in the statistical unit. In the present embodiment, the total of the rated power (standard used power) of the electric equipment included in the statistical unit is set as the alarm level value. Specifically, for example, when the rated power of the electric equipment included in the statistical unit is 60 MW/h, the alarm level value is set to 10 MW when the time point of 10 minutes elapses from the time point of the monitoring period is set. When the time of 20 minutes has elapsed, the alarm level value is set to 20 MW, and when the time point of 30 minutes has elapsed, the alarm level value is set to 30 MW. That is, the alarm level value can be set to (root According to the rated power monitoring period (30 minutes), the amount of electricity used) × (time ratio (elapsed time / 30 minutes)).

However, the alarm level value is not limited to the above example, and may be a reference value for evaluating the amount of electric power used by the electric device included in the statistical unit.

The alarm determination value calculation unit 24 acquires the alarm level difference for each statistical unit from the alarm level difference calculation unit 23, and calculates the alarm determination value based on the alarm level difference of each statistical unit. For example, the alarm determination value calculation unit 24 calculates the alarm determination value by totaling the alarm level differences of the respective statistical units. The alarm determination value calculation unit 24 outputs the calculated alarm determination value to the determination unit 25.

Further, the alarm determination value calculation unit 24 may acquire the alarm level difference for each statistical unit from the alarm level difference calculation unit 23, and read the influence degree information 33 from the storage unit 12, and the influence degrees indicated by the influence degree information 33 may be respectively Multiplying the alarm level difference of each statistical unit, and summing the multiplied values to calculate an alarm determination value, wherein all the electrical equipment included in the system of influence degree indicated by the influence degree information 33 are within the monitoring range. The degree of influence of all electrical equipment included.

In the present embodiment, the ratio of the total value of the rated power of all the electric devices included in the statistical unit to the total value of the rated electric power of all the electric devices included in the monitoring range is taken as the degree of influence. For example, the total value of the rated power of the production equipment 6a, the air conditioner 7a, and the electric lamp 8a included in the building 2a is 60 MW, and the total value of the rated power of the production equipment 6b, the air conditioner 7b, and the electric lamp 8b included in the building 2b. In the case of 40MW, The degree of influence of the building 2a is set to 0.6, and the degree of influence of the building 2b is set to 0.4.

In other words, for example, when the alarm level difference of the building 2a is 10 and the alarm level difference of the building 2b is 20, the alarm determination value calculation unit 24 can use 10×0.6+20×0.4=14 as the alarm determination value. . However, the degree of influence is not limited to the above examples.

The determination unit 25 acquires the alarm determination value from the alarm determination value calculation unit 24, reads the alarm threshold information 34 from the storage unit 12, and determines whether or not the acquired alarm determination value has exceeded the alarm threshold indicated by the alarm threshold information 34. The determination unit 25 outputs the determined result to the alarm signal transmission unit 27.

Here, the alarm threshold is a threshold for determining whether the amount of used electricity in the monitoring range has exceeded a virtual value, and according to the characteristics (rated power, etc.) or usage pattern, management demand, A hypothetical value or the like to be described later is appropriately set. For example, the above alarm threshold can also be set to 2% of the management demand. Further, although the alarm threshold can be set based on the rated power value of the electrical equipment within the monitoring range, in practice, the electric equipment is often operated with less power than the rated power value. Therefore, it is possible to measure the actual electric power consumption (consumption electric power) of the electric equipment within the monitoring range, and set the alarm threshold value based on the total value of the average electric power consumption of each electric equipment within the monitoring range.

Further, the determination unit 25 may further read the time coefficient information 35 from the storage unit 12 and multiply the alarm determination value obtained by the alarm determination value calculation unit 24 The time coefficient indicated by the coefficient information 35 determines whether the multiplied value exceeds the alarm threshold indicated by the alarm threshold information 34.

Here, the time coefficient is a forward relationship with the elapsed time from the start of the monitoring period, and is used to add a coefficient based on the weight of the elapsed time to the alarm determination value. For example, the time coefficient can be set to elapsed time /10. In this case, if the elapsed time is 10 minutes, the time coefficient is 1, and if the elapsed time is 20 minutes, the time coefficient is 2. In addition, the time coefficient may be set to 0 when the elapsed time is 0 to 5 minutes, and the time coefficient may be set to 1 when the elapsed time is 6 minutes to 30 minutes. In addition, when the elapsed time is 0 to 10 minutes, the time coefficient is set to 1, and when the elapsed time is 11 to 20 minutes, the time coefficient is set to 2, and the elapsed time is 21 to 30 minutes. In the case of the case, set the time factor to 3. That is, the time coefficient can be expressed as a function of elapsed time.

When the determination unit 25 determines that the alarm threshold value is exceeded, the determination unit 25 can output the determination result to the contribution degree calculation unit 26.

When the determination unit 25 acquires the determination result that the alarm determination value has exceeded the alarm threshold value, the contribution degree calculation unit 26 calculates the contribution ratio of the alarm level difference of the statistical unit to the alarm determination value, that is, the contribution degree for each statistical unit. The contribution degree calculation unit 26 outputs the calculated contribution degree for each statistical unit to the alarm signal transmission unit 27.

When the alarm signal transmitting unit 27 acquires the determination result that the alarm threshold has been exceeded from the determination unit 25, the display unit 9 and/or the terminal device via the communication unit 15 10 Sends an alarm message indicating that the used power in the monitored range exceeds the hypothetical value. For example, the alarm signal transmitting unit 27 can transmit the above-described alarm information to the terminal device 10 by using an e-mail to notify the user of the alarm content.

Here, more specifically, the above-mentioned alarm information refers to an over-state indicating that the amount of used electric power in the monitoring range exceeds a virtual value, and if the state continues, it may exceed the management demand (or is likely to be high). In addition, the above-mentioned virtual value means a value smaller than the management time of the elapsed time, and can be arbitrarily set. For example, the above hypothetical value can be set to 50% of the management demand.

Further, when the determination unit 25 acquires the determination result that the alarm threshold value is not exceeded (the alarm threshold value is not reached), and when the previous determination result exceeds the alarm threshold value, the alarm signal transmitting unit 27 can transmit the monitoring range. The recovery information within the used power is lower than the hypothetical value.

Here, more specifically, the above-mentioned recovery information means that the amount of used electric power within the monitoring range is restored from the over-state to the general state, and as long as the state is maintained, the management demand is not exceeded (or the possibility of exceeding is low) .

In addition, when the determination result of the alarm threshold value is exceeded from the determination unit 25, and the contribution degree calculation unit 26 acquires the contribution degree of each statistical unit, the alarm signal transmission unit 27 can determine the statistical unit indicating the highest contribution degree. And send an alarm message indicating that the used power in the monitored range exceeds the hypothetical value, and the electrical equipment included in the determined statistical unit is the one that most contributes to the used power.

Further, the alarm signal transmitting unit 27 acquires the alarm that has been exceeded from the determination unit 25. When the contribution degree calculation unit 26 obtains the contribution degree of each statistical unit from the contribution degree calculation unit 26, the statistical unit can be sorted according to the value of the contribution degree from the largest to the smallest, and the power consumption in the monitoring range is transmitted. Exceeding the hypothetical value and the alarm information in the order in which the statistical units are arranged according to the contribution degree.

Thereby, it is possible to notify the user that the amount of electric power used in the electric equipment included in the monitoring range can be most effectively reduced as long as the electric power consumption of the electric equipment is suppressed.

In addition, when the alarm signal transmitting unit 27 acquires the determination result that the alarm threshold has been exceeded from the determination unit 25 when the predetermined time has not elapsed from the start of the monitoring period, the alarm information may not be transmitted. The period in which this alarm information is not sent is referred to as the alarm mask period.

The data setting unit 28 generates the statistical unit information 31, the alarm level value information 32, the influence degree information 33, the alarm threshold information 34, and the time coefficient information 35 based on the instruction input from the user input from the operation unit 14, and generates the generated information. The information is saved to the storage unit 12.

(Processing of the electricity quantity monitoring device)

Next, the processing flow of the power quantity monitoring device 1 will be described with reference to Fig. 3 . FIG. 3 is a flowchart showing an example of a flow of a power amount monitoring process of the power quantity monitoring device 1.

As shown in FIG. 3, the data acquisition unit 21 acquires the amount of electric power used by each electric device from the ammeter 5 via the data input unit 13 (S1). The data acquisition unit 21 will The acquired power consumption of each electric device is output to the data statistics unit 22.

The data statistic unit 22 acquires the amount of electric power used by each electric device from the data acquisition unit 21, and reads the statistical unit information 31 from the storage unit 12. Then, the data statistic unit 22 counts the cumulative used electric energy of the electric device from the monitoring cycle start time point to the current time point for each statistical unit indicated by the statistical unit information 31 (S2). The data statistic unit 22 outputs the accumulated used electric energy calculated for each statistical unit to the alarm level difference calculation unit 23.

The alarm level difference calculation unit 23 acquires the cumulative use power amount for each statistical unit from the material statistics unit 22, and reads the alarm level value information 32 from the storage unit 12. Then, the alarm level difference calculation unit 23 calculates, for each statistical unit, the difference between the accumulated power usage amount counted by the data statistic unit 22 and the alarm level value indicating the current time point of the statistical unit indicated by the alarm level value information 32. Level difference (S3). The alarm level difference calculation unit 23 outputs the alarm level difference calculated for each statistical unit to the alarm determination value calculation unit 24.

The alarm determination value calculation unit 24 acquires the alarm level difference for each statistical unit from the alarm level difference calculation unit 23, and calculates an alarm determination value based on the alarm level difference of each statistical unit (S4).

Next, the determination unit 25 acquires the alarm determination value from the alarm determination value calculation unit 24, and reads the alarm threshold information 34 from the storage unit 12, and determines whether or not the acquired alarm determination value has exceeded the alarm threshold indicated by the alarm threshold information 34 (S5). ).

Here, the determination unit 25 determines that the alarm determination value has exceeded the alarm threshold. In the case (YES in S5), the determination result is output to the alarm signal transmitting unit 27 and the contribution degree calculating unit 26.

When the determination unit 25 obtains the determination result that the alarm determination value has exceeded the alarm threshold value, the contribution degree calculation unit 26 calculates the contribution ratio of the alarm level difference of the statistical unit to the alarm determination value, that is, the contribution degree for each statistical unit (S6). . The contribution degree calculation unit 26 outputs the contribution degree of each of the calculated statistical units to the alarm signal transmission unit 27.

The alarm signal transmitting unit 27 acquires the determination result that the alarm threshold has been exceeded from the determination unit 25, and acquires the contribution degree of each statistical unit from the contribution degree calculation unit 26, and determines the statistical unit indicating the highest contribution degree (S7). Then, the alarm signal transmitting unit 27 transmits to the display device 9 and the terminal device 10 via the communication unit 15 that the amount of used electric power in the monitoring range has exceeded the virtual value, and that the electric device included in the determined statistical unit is the most contributor to the used electric energy. Alert information. The display device 9 and the terminal device 10 notify the user of the alarm content indicated by the received alarm information (S8).

On the other hand, when the determination unit 25 determines that the alarm determination value has not exceeded the alarm threshold (NO determination in S5), the determination unit 25 outputs the determination result to the alarm signal transmission unit 27.

When the alarm signal transmitting unit 27 obtains the determination result that the alarm determination value does not exceed the alarm threshold value, the alarm signal transmitting unit 27 further determines whether the previous determination result exceeds the alarm threshold value (S9). When the result of the last judgment is that the alarm threshold has been exceeded (YES at S9), the alarm signal transmitting unit 27 transmits recovery information indicating that the used power in the monitored range is lower than the hypothetical value. The display device 9 and the terminal device 10 notify the user of the content indicated by the received resume information (S10). On the other hand, if the result of the previous determination is that the alarm threshold has not been exceeded (NO in S9), the battery monitoring process is ended.

Further, the electric power monitoring device 1 executes the series of processes (S1 to S10) at each monitoring interval to monitor the amount of electric power used by the electric equipment included in the monitoring range in the monitoring period.

Further, in step S4, the alarm determination value calculation unit 24 may calculate the alarm determination value by totaling the alarm level differences of the respective statistical units. Further, the alarm determination value calculation unit 24 can acquire the alarm level difference for each statistical unit from the alarm level difference calculation unit 23, and read the influence degree information 33 from the storage unit 12, and the statistical unit indicated by the influence degree information 33 The influence degree is multiplied by the alarm level difference of each statistical unit, and the value obtained by the multiplication is added to calculate the alarm judgment value.

Further, in step S5, the determination unit 25 can read the time coefficient information 35 from the storage unit 12, multiply the time coefficient indicated by the time coefficient information 35 by the alarm determination value acquired from the alarm determination value calculation unit 24, and determine the multiplication. Whether the value obtained by the calculation has exceeded the alarm threshold indicated by the alarm threshold information 34.

The longer the elapsed time from the start of the monitoring period, the more difficult it is to control the amount of power used below the management demand in the case where the used power exceeds the hypothetical value. That is, by multiplying the time coefficient by the alarm judgment value, it is possible to consider the basis. Correspondence (danger) of the elapsed time.

(Example)

Next, a specific embodiment of the electric quantity monitoring process will be described with reference to Figs. 4 to 6 .

In the present embodiment, the statistical unit is used as the category unit of the electrical device. That is, the production equipment 6a, 6b is used as a statistical unit (statistical unit A), the air conditioning equipment 7a, 7b is used as a statistical unit (statistical unit B), and the electric lights 8a, 8b are used as one statistical unit (statistical unit C). In addition, the rated electric power of the total of the production equipments 6a and 6b is 50 MW/h, the rated electric power of the total of the air-conditioning equipments 7a and 7b is 30 MW/h, and the rated electric power of the electric lamps 8a and 8b is 20 MW/h.

Moreover, the alarm level value of each statistical unit is used as the rated power of the total number of electrical equipment included in the statistical unit. That is, the alarm level value of the statistical unit A is 50 MW × elapsed time / 60 minutes, the alarm level value of the statistical unit B is 30 MW × elapsed time / 60 minutes, and the alarm level value of the statistical unit C is 20 MW × elapsed time / 60 minutes .

In addition, the management demand is set to 100 MW, and the alarm threshold is set to 2% of the management demand, that is, 2 MW.

In this case, the cumulative used electric quantity of each statistical unit of a certain monitoring period counted by the data statistic unit 22 is shown in FIG. 4 is a graph depicting the cumulative usage power of each statistical unit A, B, and C, and the alarm level value for each statistical unit. The horizontal axis of Fig. 4 represents the elapsed time (minutes) from the start of the monitoring period, and the vertical axis represents the cumulative used electric quantity (MW).

The result calculated by the alarm level difference calculation unit 23 based on the accumulated power usage amount and the alarm level value shown in FIG. 4 is shown in FIG. 5. Figure 5 is a graph depicting the difference in alarm levels for each statistical unit. The horizontal axis of Fig. 5 represents the elapsed time (minutes) from the start of the monitoring period, and the vertical axis represents the alarm level difference (MW).

Next, the alarm determination value calculated by the alarm determination value calculation unit 24 based on the alarm level difference of each statistical unit shown in FIG. 5 is shown in FIG. 6. Figure 6 is a graph depicting alarm determination values. The horizontal axis of Fig. 6 represents the elapsed time (minutes) from the start of the monitoring period, and the vertical axis represents the alarm determination value (MW). Here, the alarm determination value calculation unit 24 calculates the alarm determination value by totaling the alarm level differences of the respective statistical units.

As shown in FIG. 6, at the time point of the elapsed time of 24 minutes, the alarm judgment value has exceeded the alarm threshold, and the contribution of the statistical unit C is the largest. Therefore, at the time when the elapsed time is 24 minutes, the alarm signal transmitting unit 27 transmits the alarm information indicating that the used electric power in the monitoring range has exceeded the virtual value, and the electric light 8 included in the statistical unit C is the one that most contributes to the used electric energy.

In addition, at the time point of the elapsed time of 25 minutes, the alarm judgment value is lower than the alarm threshold. Therefore, at the time when the elapsed time is 25 minutes, the alarm signal transmitting unit 27 transmits the recovery information indicating that the used electric power in the monitoring range is lower than the virtual value.

(Modification)

In the present embodiment, although the amount of electric power used in all the electric devices included in the monitoring range is obtained, only a part of the electric power included in the monitoring range may be acquired. The amount of electricity used by the gas equipment to monitor the amount of electricity used in the monitored range.

When a plurality of electrical devices are installed in the monitoring range, the cost and installation cost of an ammeter such as the amount of electricity used for each electrical device are increased. Further, depending on a problem in the structure of the electric device, a situation in which the electric device is installed, or the like, there is a case where it is difficult to provide an ammeter for measuring the amount of electric power used by the electric device. Therefore, it is sometimes possible to obtain only the amount of electricity used by electrical equipment included in the monitoring range.

In this case, the alarm threshold can be set by setting the alarm threshold based on the total influence degree of the management demand (target upper limit power) determined in advance for all the electric devices included in the monitoring range and the total degree of influence of each statistical unit. The judgment is made with precision.

That is, in this case, the data statistic unit 22 classifies a part of the electric equipment included in the monitoring range into a plurality of statistical units, and calculates the cumulative used electric power for each statistical unit. The alarm level difference calculation unit 23 calculates an alarm level difference which is a difference between the accumulated usage power amount and the alarm level value for each statistical unit. The alarm determination value calculation unit 24 calculates an alarm determination value based on the alarm level difference of each statistical unit. Further, at this time, the alarm determination value calculation unit 24 may use only the total value of the alarm level differences of the respective statistical units as the alarm determination value, or may calculate the alarm determination value using the influence degree. Then, the determination unit 25 determines whether or not the alarm determination value has exceeded the alarm threshold based on the management demand amount and the total influence degree.

For example, the electric lamp 8 is excluded, and only the production device 6 and the air conditioner 7 are provided. Ammeter. That is, in the above embodiment, statistics are only performed on the statistical units A and B. If the degree of influence is calculated based on the ratio of rated power, the influence degree of statistical unit A is 0.5, the influence degree of statistical unit B is 0.3, and the total influence degree of statistical units A and B is 0.8.

In the above embodiment, although the alarm threshold is set to 2% of the management demand, in this case, the alarm threshold may be set to (management demand 100 MW) × (total influence degree 0.8) × 0.02 = 1.6 MW.

As described above, even when only the amount of electric power used by the electric equipment included in the monitoring range is acquired, the alarm threshold can be appropriately set and the high-precision determination can be performed.

(supplement)

The present invention is not limited to the above embodiments, and various modifications can be made without departing from the scope of the invention. In other words, an embodiment obtained by combining technical means appropriately modified within the scope of the patent application range is also included in the technical scope of the present invention.

Finally, each module of the power quantity monitoring device 1, in particular, the control unit 11 may be constituted by hardware logic, or may be realized by software using a CPU as described below.

In other words, the power monitoring device 1 includes a CPU (Central Processing Unit) that executes a command for realizing a control program for each function, and a ROM (Read Only Memory) that stores the program. Expand the RAM (Random Access Memory) of the above program, and store the memory of the above program and various data. Storage device (recording medium), etc. Moreover, the object of the present invention can also be achieved by the following method: a program (execution format program, intermediate code program, source program) of a control program of the power quantity monitoring device 1 that is used to implement the above functions can be recorded by a computer. The recording medium is supplied to the above-described electric quantity monitoring device 1, and reads a code recorded on the recording medium by the computer (or CPU, MPU (Micro Processing Unit)).

As the recording medium, for example, a tape type recording medium such as a magnetic tape or a cassette tape, a magnetic disk including a floppy disk (registered trademark)/hard disk, or a CD-ROM (Compact Disc Read-Only Memory, read only) can be used. CD-ROM / MO (Magneto Optical Disc) / MD (Mini Disc, Mini Disc) / DVD (Digital Versatile Disc) / CD-R (Compact Disc-Recoder, recordable disc) Type of recording medium, card-type recording medium such as IC card (including memory card)/optical card, or mask ROM (mask read-only memory)/EPROM (Erasable Programmable Read-Only Memory, erasable programmable read-only memory) A semiconductor memory type recording medium such as an EEPROM (Electrically Erasable Programmable Read-Only Memory)/Flash ROM (Flash ROM).

Alternatively, the power quantity monitoring device 1 may be connected to a communication network, and the code may be supplied via a communication network. The communication network is not particularly limited. For example, the Internet, the internal network, the commercial network, the LAN (Local Area Network), and the ISDN (Integrated) can be utilized. Services Digital Network, integrated service digital network), VAN (Value Added Network), CATV (Cable Television) communication network, virtual private network (Virtual Private Network), telephone network, mobile Communication network, satellite communication network, etc. Further, the transmission medium constituting the communication network is not particularly limited. For example, IEEE1394, USB (Universal Serial Bus), power line carrier, cable TV line, and telephone line can be used. A wired transmission medium such as an ADSL (Asymmetric Digital Subscriber Line) line, or an infrared, such as an IrDA (Infrared Data Association) or a remote controller, Bluetooth (registered trademark, Bluetooth) Wireless transmission media such as 802.11 wireless (wireless network interface specification), HDR (High Dynamic Range Imaging), mobile phone network, satellite line, terrestrial digital network. Furthermore, the present invention can also be realized by a form of a computer data signal embedded in a carrier wave by means of electronic transmission.

(industrial availability)

The present invention can be utilized in a power storage device that monitors the amount of electricity used by a plurality of electrical devices such as demand monitoring.

1‧‧‧Power monitoring device

2, 2a, 2b‧‧‧ buildings

3, 3a, 3b‧‧‧Electrometer (measuring device)

4, 4a1, 4a2, 4a3‧‧‧ transformer

4b1, 4b2, 4b3‧‧‧ transformer

5, 5a1, 5a2, 5a3‧‧‧ galvanometer (measuring device)

5b1, 5b2, 5b3‧‧‧ galvanometer (measuring device)

6, 6a, 6b‧‧‧ production equipment (electrical equipment)

7, 7a, 7b‧‧‧ air conditioning equipment (electrical equipment)

8, 8a, 8b‧‧‧ electric lights (electrical equipment)

9‧‧‧Display device (notification device)

10‧‧‧ Terminal equipment (notification device)

11‧‧‧Control Department

12‧‧‧ Storage Department

13‧‧‧Data Input Department

14‧‧‧Operation Department

15‧‧‧Communication Department

21‧‧‧Information Acquisition Department

22‧‧‧Information Statistics Department (statistical means)

23‧‧‧Alarm level difference calculation unit (alarm level difference calculation means)

24‧‧‧Alarm judgment value calculation unit (alarm judgment value calculation means, influence degree determination means)

25‧‧‧Decision Department (judgment means)

26‧‧‧Contribution calculation department (contribution calculation means)

27‧‧‧Alarm signal transmission unit (output means)

28‧‧‧Information Setting Department

31‧‧‧Statistical Unit Information

32‧‧‧Alarm level value information

33‧‧‧Impact information

34‧‧‧Alarm threshold information

35‧‧‧Time Coefficient Information

100‧‧‧Power Monitoring System

S1~S10‧‧‧Steps

Fig. 1 is a block diagram showing the configuration of a main part of a power quantity monitoring device, showing an embodiment of the present invention.

FIG. 2 is a view showing an example of an outline of a power amount monitoring system including the above-described power amount monitoring device.

FIG. 3 is a flowchart showing an example of the electric power monitoring process executed by the electric quantity monitoring device.

4 is a graph depicting the cumulative usage power of each statistical unit of an embodiment, and the alarm level values for each statistical unit.

Fig. 5 is a graph depicting the difference in alarm levels for each statistical unit of the above embodiment.

Fig. 6 is a graph depicting alarm determination values of the above embodiment.

1‧‧‧Power monitoring device

11‧‧‧Control Department

12‧‧‧ Storage Department

13‧‧‧Data Input Department

14‧‧‧Operation Department

15‧‧‧Communication Department

21‧‧‧Information Acquisition Department

22‧‧‧Information Statistics Department (statistical means)

23‧‧‧Alarm level difference calculation unit (alarm level difference calculation means)

24‧‧‧Alarm judgment value calculation unit (alarm judgment value calculation means, influence degree determination means)

25‧‧‧Decision Department (judgment means)

26‧‧‧Contribution calculation department (contribution calculation means)

27‧‧‧Alarm signal transmission unit (output means)

28‧‧‧Information Setting Department

31‧‧‧Statistical Unit Information

32‧‧‧Alarm level value information

33‧‧‧Impact information

34‧‧‧Alarm threshold information

35‧‧‧Time Coefficient Information

Claims (10)

An electric quantity monitoring device for monitoring a used electric quantity of a plurality of electric devices included in a monitoring range, characterized in that it is provided with: statistical means for classifying the plurality of electric devices into a plurality of statistical units, and for each The statistical unit separately counts the used electric quantity of the electrical equipment; the alarm level difference calculating means calculates, for each of the above statistical units, the used electric quantity calculated by the statistical unit and the alarm level value determined in advance for each of the statistical units. The difference between the alarm levels, that is, the alarm level calculation means, the alarm determination value is calculated based on the alarm level difference of each statistical unit calculated by the alarm level difference calculation means; and the determination means determines the alarm determination value calculation means Whether the calculated alarm determination value has exceeded a predetermined alarm threshold value; and when the determination means determines that the alarm determination value has exceeded the alarm threshold value, the output means outputs a value indicating that the amount of electricity used in the monitoring range has exceeded Alert information. The electric power monitoring device according to the first aspect of the invention, further comprising: a contribution degree calculation means for calculating, for each of the statistical units, an alarm level difference of the statistical unit with respect to the alarm determination value The ratio is the contribution degree, and the above determining means determines that the alarm determination value has exceeded the alarm threshold In the case of a value, the output means adds the information that the electric appliance included in the statistical unit having the highest contribution degree to the alarm determination value to the alarm information and outputs the information to the alarm information. The power monitoring device according to claim 1 or 2, further comprising: an influence degree determining means for determining, for each of the statistical units, an electrical device included in the statistical unit for the monitoring range The alarm determination value calculation means calculates the alarm by multiplying the alarm level difference of each statistical unit calculated by the alarm level difference calculation means by the result of the influence degree, respectively. Judgment value. The electric power monitoring device according to claim 1 or 2, wherein the determining means determines whether the value obtained by multiplying the alarm determination value calculated by the alarm determination value calculating means by the time coefficient has exceeded the alarm threshold value, The time coefficient is a positive relationship with the elapsed time from the start of the monitoring period. The power monitoring device according to claim 3, wherein the determining means determines whether the alarm determination value exceeds the alarm threshold value according to the target upper limit electric quantity and the total influence degree, and the target upper limit electric quantity is included in the monitoring range All of the electrical equipment are determined in advance, and the total degree of influence is obtained by summing the influence degrees of the respective statistical units determined by the influence degree determining means. A power monitoring system, characterized in that The electric power monitoring device according to any one of claims 1 to 5, wherein the measuring device measures a used electric quantity of the electric device, and outputs the measured electric quantity of the electric device to the electric quantity monitoring. Device. An electric power monitoring system according to any one of claims 1 to 5, wherein the notification device receives the alarm information output by the output means and notifies the user The content of the alert represented by the received alert information. A power monitoring method for monitoring usage power of a plurality of electrical devices included in a monitoring range, characterized in that it comprises: a statistical step of classifying the plurality of electrical devices into a plurality of statistical units, and for each of the The statistical unit separately counts the used electric quantity of the electrical equipment; the alarm level difference calculating step calculates, for each of the above statistical units, the used electric quantity calculated in the above statistical step, and the alarm level determined in advance for each of the statistical units. The difference between the values is the alarm level difference; the alarm determination value calculation step calculates the alarm determination value based on the alarm level difference of each statistical unit calculated in the alarm level difference calculation step; a determination step of determining whether the alarm determination value calculated in the alarm determination value calculation step has exceeded a predetermined alarm threshold value; and an output step of determining, in the determination step, that the alarm determination value has exceeded the alarm threshold value, Outputs an alarm message indicating that the amount of power used in the monitored range has exceeded. A control program product, which is a control program product for operating a power storage device according to any one of claims 1 to 5, characterized in that the computer has a function as each of the above means. A computer-readable recording medium recorded with a control program for causing a power monitoring device as claimed in any one of claims 1 to 5 to operate a computer as a function of the above means .