JP5842120B2 - Power usage monitoring device, power usage monitoring system - Google Patents

Description

  The present invention relates to a power usage monitoring device used for monitoring the presence or absence of power usage from the primary side of a power meter, and to a power usage monitoring system for notifying a management device of the results of monitoring by the power usage monitoring device. .

  Generally, a power meter is installed in a power consumer, and the amount of power used by the consumer is measured using the power meter. Therefore, the power supply company (electric power company) charges the electricity bill by trusting the meter reading value of the power meter. In other words, if a bypass line that does not pass through the power meter is attached, the power is used without being measured by the power meter, and the power supplier loses the basis for charging the electricity bill. In other words, when so-called stealing is performed by attaching a bypass line, there arises a problem that the profit of the power supply company is compressed.

  In order to solve such a problem, various techniques have been proposed. For example, Patent Document 1 describes a technique that focuses on the current flowing in and out at a branch point between a first distribution line connected to a substation and a second distribution line that supplies power to a consumer. Yes. That is, the configuration described in Patent Document 1 is based on the principle that the amount of current flowing into the branch point and the amount of current flowing out of the branch point must match.

  Therefore, in order to measure the amount of current flowing into and out of the branch point, current detection devices are provided on the upstream side and the downstream side of the branch point in the first distribution line. In addition, the amount of current supplied from the branch point to the consumer is obtained from the meter reading value of a watt-hour meter (that is, a power meter) provided in the second distribution line. In this configuration, in the first distribution line, when the current amount measured in the second distribution line exceeds a predetermined range with respect to the difference in current amount measured on the upstream side and downstream side of the branch point, respectively. (When the specified value is smaller than the above difference), it is determined that theft is being performed.

  In addition, in order to solve the above-described problem, Patent Document 2 discloses that an area where power is supplied is divided into a plurality of areas, and the area is further divided into a plurality of areas. A technique for measuring electric energy is described. That is, the configuration described in Patent Document 2 is based on the principle that, in a hierarchical distribution network, the total amount of power used in the lower layer must match the amount of power in the upper layer.

  Therefore, a power accumulator that measures the amount of power used in one area and a power amount accumulator that measures the amount of power used for each area (which can be read as a consumer) that divides the area (power) Which can be read as a meter). In this configuration, the total amount of electric power measured by the electric energy accumulator provided for each area is compared with the electric energy measured by the electric energy accumulator provided in the area, and both values are different (the electric energy in the area). If the total amount of power in the area is smaller), it is detected as an abnormality such as theft.

Japanese Patent Application No. 2004-340767 Japanese Patent Application No. 2003-209938

  In the techniques described in Patent Document 1 and Patent Document 2, when the amount of current or the amount of power is measured at a plurality of locations, and the planned relationship is not established between the measured amount of current or the amount of power, It is determined that an abnormality such as a theft of electricity has occurred. Therefore, in addition to the power meter installed for each consumer, a device that measures the amount of current or the amount of power is required, and both the measurement results of those devices and the power meter are measured using communication technology. An apparatus for obtaining and determining whether there is an abnormality is required. That is, in order to adopt the techniques described in Patent Documents 1 and 2 in the existing distribution network, communication is performed with both the current detection device and the electric energy integrator installed in the distribution line and the electric power meter installed in the consumer. A function is required. Moreover, since the technology described in Patent Documents 1 and 2 requires a communication function for the power meter, an existing power meter that does not have a communication function for remote meter reading or the like must be replaced.

  As described above, when the techniques described in Patent Documents 1 and 2 are used to detect the presence or absence of an abnormality in which power is used from the primary side of the power meter, a large amount of equipment is required for the existing distribution network. Investment is required.

  In detecting whether or not power is being used from the primary side of the power meter, the present invention uses only one of the amount of power measured by the power distribution network and the amount of power measured by the power meter. The purpose is to provide a power usage monitoring device that suppresses an increase in capital investment in the network, and further uses this power usage monitoring device to monitor whether power is being used from the primary side of the power meter. The purpose is to provide a monitoring system.

The power usage monitoring apparatus according to the present invention includes a watt-hour meter that is arranged on an electric circuit that supplies power to a plurality of consumers and that measures the total amount of power supplied to the entire consumer, and the entire consumer is in a predetermined period. An estimated power storage unit that stores a set of an estimated range of consumed energy and a predetermined period in advance, and a state in which the total power measured by the watt hour meter exceeds the estimated range stored in the estimated power storage unit during the predetermined period An abnormality determination unit that determines that an abnormality is detected, and a notification unit that notifies abnormality information when the abnormality determination unit determines that the abnormality is abnormal.

The power usage monitoring apparatus according to the present invention includes a power amount acquisition unit that acquires, by communication, the amount of power received for each consumer from a power meter that is disposed in each of the plurality of consumers and has a communication function, and the entire consumer Is an estimated power storage unit that stores in advance a set of an estimation range of the amount of power consumed in a predetermined period and a predetermined period, and an estimation in which the total amount of power measured by the power meter in the predetermined period is stored in the estimated power storage unit An abnormality determination unit that determines that a state smaller than the range is abnormal, and a notification unit that notifies abnormality information when the abnormality determination unit determines that an abnormality has occurred.

  In this power usage monitoring apparatus, the estimated power storage unit, the abnormality determination unit, and the notification unit are preferably attached to a transformer that supplies power to the entire consumer.

  In this power usage monitoring apparatus, the notification unit preferably performs notification by visual stimulation.

  In this power usage monitoring apparatus, the notification unit preferably performs notification by auditory stimulation.

In this power usage monitoring device, the notification unit, it is preferable to notify the abnormality information with position of the power usage monitoring apparatus to the management apparatus through the communication network.

  A power usage monitoring system according to the present invention includes the power usage monitoring device according to any one of claims 1 to 6 and a management device that communicates with the power usage monitoring device via a communication network. Abnormal information is notified from the apparatus to the management apparatus through a communication network.

  According to the configuration of the present invention, it is possible to detect whether power is being used from the primary side of the power meter by using only one of the power amount measured by the distribution network and the power amount measured by the power meter. As a result, there is an advantage that an increase in capital investment for the existing power distribution network can be suppressed.

1 is a block diagram illustrating a first embodiment. It is a whole block diagram same as the above. FIG. 6 is a block diagram illustrating a second embodiment.

(Embodiment 1)
In this embodiment, a watt hour meter is arranged on a power circuit that supplies power to a plurality of consumers of interest in the distribution network, and power is illegally used from the primary side of the power meter based on the amount of power measured by the watt hour meter. The structure which estimates whether it is done is employ | adopted. The plurality of consumers of interest in the present embodiment is a group of consumers receiving power from the secondary side of one transformer provided by the power supply company in the distribution network. It is arranged on the secondary side of the electric circuit and upstream of the branch point of the distribution network to each customer. The transformer means a step-down transformer disposed on a power pole, above the ground, underground, in a building, or the like.

  In this configuration, the amount of power measured by the watt-hour meter is the total amount of power received by the customer group from the secondary side of one transformer and the amount of power lost in the distribution network from the transformer to the power meter. And the total. Therefore, if the amount of power supplied from the secondary side of the transformer is compared with the total amount of power received by the customer group, the power is incorrect between the transformer and the power meter (that is, the primary side of the power meter). It can be determined whether or not it is used.

  However, in a configuration where the total amount of power received by the customer group is calculated as the total amount of power measured by the power meter for each consumer, the power meter requires a communication function, and the existing power meter is replaced. Will require a large amount of capital investment. Therefore, in the configuration in which the communication function is provided in the power meter for each consumer, the spread is hindered.

  By the way, the total amount of power received by the group of consumers on the secondary side of the transformer changes from moment to moment, but in a predetermined period in units of several hours, one day, one week, one month, etc. Knowledge has been obtained that the total power received by the group is regular. For example, if the unit is several hours or one day, the total amount of power varies depending on the time of day and the day of the week, but there is no significant change in the total amount of power on the same day of each day or day of the week. Can be estimated. In addition, if the unit is one week or one month, the total electric energy varies depending on the season, but the amount of change in the total electric energy can be estimated in the adjacent week or adjacent month, and the total electric power in the same week or month of the year can be estimated. It can be estimated that there is no significant change in quantity. That is, if the period and the number of consumers are appropriate, the total power amount in the predetermined period can be estimated with a relatively small error range based on past results and the like.

  In the example described above, the total amount of power received by the secondary customer group in the transformer in a predetermined period is estimated using the total amount of power and time information. By using such information, it is estimated with higher accuracy.

  In the present embodiment, the total power supplied to the consumer group from the secondary side of the transformer uses the measured value measured by the watt-hour meter, and the total power received by the consumer group uses the estimated value, The structure which detects the presence or absence of use of the electric power from the primary side of an electric power meter is employ | adopted.

  Below, as shown in FIG. 2, the case where the several consumers 23 receive electric power from the secondary side of the step-down transformer 22 provided in the distribution networks 20 and 21 is demonstrated as an example. Although the transformer 22 has illustrated the pole transformer, if it is the transformer 22 used equivalent to a pole transformer, there will be no restriction | limiting in particular about an arrangement | positioning location. Each consumer 23 includes a power meter 24, and the power meter 24 measures the amount of power received by the consumer 23.

  The power usage monitoring device 10 is disposed in the vicinity of the transformer 22. The power usage monitoring device 10 is arranged on the upstream side of the distribution network 21 on the secondary side of the transformer 22 with respect to the part where the distribution network 21 for distributing power to each consumer 23 branches. The power usage monitoring device 10 is provided to monitor the presence or absence of power usage from the primary side (upstream side) of the power meter 24, and from the upstream side (transformer 22 side) of the power usage monitoring device 10. It is preferable to dispose as close to the secondary side of the transformer 22 as possible so that power is not extracted.

  When the transformer 22 is a pole transformer, it is difficult to extract power from the upstream side of the power usage monitoring device 10 because the power usage monitoring device 10 is disposed on the power pole. In order to make it more difficult to extract power from the upstream side of the power usage monitoring device 10, a configuration in which the power usage monitoring device 10 is integrated with the transformer 22 is adopted, or the power usage monitoring device 10 is used as the transformer 22. In addition, a configuration housed in a housing may be adopted. The same applies to the case where the transformer 22 is arranged at a place other than on the utility pole. In the case of an apartment house, the transformer 22 that supplies power to the customer 23 may be stored in an electric room (EPS = Electric Pipe Shaft). Therefore, the power usage monitoring device 10 is stored in the electric room together with the transformer 22. Just keep it.

  The main part of the power usage monitoring apparatus 10 is constituted by a microcomputer (microcomputer), and the functions of each component described below are realized by executing an appropriate program by the microcomputer. In other words, the power usage monitoring apparatus 10 includes a program for causing the microcomputer to operate as each configuration described below. The power usage monitoring apparatus 10 also includes a configuration that is not included in the microcomputer. A PLD (Programmable Logic Device) other than the microcomputer may be used.

  As shown in FIG. 1, the power usage monitoring apparatus 10 includes a processing unit 11 that performs overall control and monitoring of each configuration described below, and a clock unit 12 that measures the date and time. The processing unit 11 monitors the operation of each component of the power usage monitoring device 10 and gives an instruction to each component of the power usage monitoring device 10 at an appropriate timing.

  The watt hour meter 13 provided in the power usage monitoring device 10 measures the amount of power supplied from the secondary side of the transformer 22 to the consumer 23. The watt-hour meter 13 measures the total amount (total amount of power) of the amount of power supplied to all the consumers 23 that receive power from the secondary side of the transformer 22.

  The watt hour meter 13 is an electronic type, and calculates the amount of power from the voltage detected by the voltage sensor and the current detected by the current sensor. For example, a voltage dividing resistor is used for the voltage sensor, and a current transformer is used for the current sensor, for example. The calculation means for calculating the amount of electric power from the detected voltage and current is constituted by the microcomputer described above.

  The power usage monitoring device 10 includes an actually measured power storage unit 14 that stores the amount of power measured by the watt hour meter 13 in association with the date and time that the clock unit 12 is timing. That is, the processing unit 11 is configured to measure the amount of power measured by the watt hour meter 13 at a predetermined time (for example, 1 second, 30 seconds, 1 minute) counted by the clock unit 12, In association with each other, the measured power storage unit 14 accumulates them. The processing unit 11 not only stores the power amount and the date and time in association with each other in the actual power storage unit 14 but also stores the integrated value of the power amount in the predetermined period in the actual power storage unit 14.

  By the way, the power usage monitoring apparatus 10 includes an estimated power storage unit 15 that stores in advance an estimation range of the amount of power received by the entire consumer 23 receiving power from the secondary side of the transformer 22 during the predetermined period described above. Here, the whole consumer 23 means all the consumers 23 (customer group) receiving power from the secondary side of one transformer 22. The estimation range of the amount of power stored in the estimated power storage unit 15 estimates the amount of power supplied to the customer group in a predetermined period from past results, and takes into account estimation errors and loss in the distribution network 21 and the like. It is determined. In addition, since the amount of power supplied from the transformer 22 in a predetermined period may vary depending on whether it is a weekday or a holiday or according to a season, the estimated range of the amount of power stored in the estimated power storage unit 15 is It is associated with a period. In short, the estimated power storage unit 15 is registered in advance with a set of the estimation range and period of the electric energy.

  As described above, since the estimated power storage unit 15 stores the estimation range and the period of the electric energy as a set, the processing unit 11 designates the period in the estimated power storage unit 15, thereby The estimated range of the corresponding power amount can be extracted from the estimated power storage unit 15. Now, let us assume a case where one day from midnight of the previous day to midnight of the current day is defined as a period, and the estimated power storage unit 15 stores the estimation range of the daily power amount in this period.

  By the way, the power usage monitoring apparatus 10 compares the measured value of the power amount for the predetermined period stored in the measured power storage unit 14 with the estimated range of the power amount for the predetermined period stored in the estimated power storage unit 15 in advance. An abnormality determination unit 16 is provided. That is, the processing unit 11 stores the amount of power for one day in the measured power storage unit 14 and then instructs the abnormality determination unit 16 so that the amount of power stored in the measured power storage unit 14 is the estimated power storage unit 15. Is determined to be within the estimated range of daily power stored in the abnormality determination unit 16. Note that since the estimation range of the electric energy also changes when the date and time are different, the processing unit 11 sets the estimation range of the electric energy according to the period corresponding to the electric energy stored in the actual measurement electric power storage unit 14. It is preferable to extract from.

  When the power amount stored in the actually measured power storage unit 14 deviates from the estimated range of the power amount stored in the estimated power storage unit 15, the abnormality determination unit 16 It is determined that there is an abnormality between. In particular, when power is used illegally from the primary side of the power meter 24, the amount of power stored in the measured power storage unit 14 rather than the estimated range of power stored in the estimated power storage unit 15. It is predicted that the relationship will be larger. Therefore, the abnormality determination unit 16 determines that power is used illegally from the primary side of the power meter 24 when this relationship is established.

  Note that a configuration may be adopted in which the measured power storage unit 14 stores the power amount for each short time, and when the abnormality determination unit 16 compares the power amount, the processing unit 11 calculates the total power amount. . In other words, the actual power storage unit 14 may calculate the total amount of power during the comparison by the abnormality determination unit 16 without storing the power amount during a predetermined period. In addition, the measured power storage unit 14 does not store the power amount for each short time, but stores the integrated value of the power amount, and uses the integrated value of the power amount for a predetermined period for comparison in the abnormality determination unit 16. Also good. If this configuration is adopted, the amount of data stored in the measured power storage unit 14 is reduced, so that a semiconductor memory having a small storage capacity can be used as the measured power storage unit 14.

  The power usage monitoring apparatus 10 includes a notification unit 17 that notifies abnormality information when the abnormality determination unit 16 determines that an abnormality has occurred. The notification unit 17 can employ various configurations. For example, a configuration in which abnormal information is notified by visual stimulation or auditory stimulation can be employed. The notification by visual stimulation uses an appropriate light emitting element such as a light emitting diode, and when the abnormality determining unit 16 determines that an abnormality has occurred, the light emitting element is turned on or the light emitting element is blinked and turned on. Notice. Alternatively, abnormality information may be notified using a display such as a liquid crystal display or an organic EL display as the notification unit 17. When notification by auditory stimulation is performed, a technology that sounds a buzzer or generates a voice message is used.

  When performing these notifications, it is preferable to continue the notification state until the abnormality determination unit 16 is reset. Moreover, it is preferable that the abnormality determination unit 16 is configured so that it cannot be reset unless it is an engineer of a power supply company.

  Since the notification by the visual stimulus or the auditory stimulus is performed at the place where the power usage monitoring device 10 is disposed, it is necessary to go to the place where the transformer 22 is disposed in order to know whether or not an abnormality has occurred. Therefore, it is preferable to know whether or not an abnormality has occurred according to the meter reading of the power meter 24. That is, it is preferable to set a period for comparison by the abnormality determination unit 16 in accordance with the timing of meter reading.

  The notification unit 17 may be configured to have a communication function for notifying the management device 30 of abnormality information through the communication path 31. In this case, the presence / absence of an abnormality can be known remotely without going to the place where the power usage monitoring device 10 is located. That is, if the communication path 31 can be maintained, the notification unit 17 may be provided with a communication function. In order to adopt this configuration, it is necessary to notify the abnormality information together with the position of each power usage monitoring device 10 in order to know the location of the transformer 22 where the abnormality has occurred.

  In order to indicate the position of the power usage monitoring device 10, position information measured by a position measuring device such as GPS can be used. Further, if the fact that the power usage monitoring apparatus 10 is attached to the transformer 22 is used, information indicating the position of the transformer 22 can be used as the position information of the power usage monitoring apparatus 10. In this case, a terminal device for maintenance (not shown) is connected to an interface (not shown) of the power usage monitoring device 10, and location information is registered in the power usage monitoring device 10 from the terminal device. Alternatively, if the management device 30 manages the identification information (communication address, etc.) of the power usage monitoring device 10 and the position of the installation location of the power usage monitoring device 10 in association with each other, the power usage The identification information of the monitoring device 10 may be used instead of the position information.

  In the configuration example described above, attention is focused on the entire customer 23 receiving power from one transformer 22, but the plurality of consumers 23 to be focused on are consumers receiving power from the same transformer 22. It may not be 23. For example, it is possible to pay attention to the entire consumer 23 receiving power from a plurality of transformers 22 and measure the total amount of power supplied to these consumers 23. This configuration is particularly effective when there are a plurality of transformers 22 in a single building, such as an apartment house. Even in this configuration, it is desirable to measure the amount of power supplied to the consumer 23 on the secondary side of the transformer 22. Therefore, it is preferable to obtain the total amount of power supplied to the consumer 23 of interest by providing a watt-hour meter 13 for each transformer 22 and communicating between the watt-hour meters 13 to be aggregated.

  Further, as described above, the amount of power received by the entire consumer 23 in a predetermined period varies not only due to the date and time but also due to external factors such as temperature and weather (mainly environmental external factors). Therefore, if necessary, a temperature sensor that monitors the temperature, an illuminance sensor that monitors the illuminance, a weather sensor that monitors the weather, and the like may be provided.

(Embodiment 2)
As shown in FIG. 1, the first embodiment employs a configuration in which the power usage monitoring device 10 includes a watt hour meter 13 in order to measure the power supplied to the consumer 23 from the secondary side of the transformer 22. Yes. That is, it is detected that the power is illegally used from the primary side of the power meter 24 while using the power meter 24 having only the function of measuring the amount of power received by the consumer 23.

  On the other hand, recently, a power meter 25 having a communication function for remote meter reading or a power meter 25 (so-called smart meter) having a control and management function together with a communication function for power supply and demand management has been proposed. ing. This embodiment is based on the premise that the power meter 25 provided in each consumer 23 has a communication function.

  That is, as shown in FIG. 3, the power meter 25 installed in each consumer 23 communicates with the measurement unit 251 that measures the amount of power received by the consumer 23 and the power amount measured by the measurement unit 251 as information. And a communication unit 252.

  In the present embodiment, as in the first embodiment, the power usage monitoring device 40 is disposed in the vicinity of the transformer 22. However, the power usage monitoring device 40 acquires the amount of power measured by the power meter 25 by communicating with the power meter 25 instead of measuring the power supplied from the secondary side of the transformer 22. As a communication technique between the power meter 25 and the power usage monitoring device 40, a technique of power line carrier communication using the distribution network 21 as a communication path is used. However, it is not essential to use the power distribution network 21 as a communication path between the power meter 25 and the power usage monitoring device 40. It is also possible to provide a wired communication path or a wireless communication path.

  As described above, the power usage monitoring device 40 according to the present embodiment acquires the amount of power received by the consumer 23 by communicating with the communication unit 252 of the power meter 25 instead of the watt-hour meter 13. 43. Other configurations of the power usage monitoring apparatus 40 are the same as those of the power usage monitoring apparatus 10 described in the first embodiment. That is, the reference numerals 41, 42, 44, 45, 46, and 47 in the present embodiment can be read as the reference numerals 11, 12, 14, 15, 16, and 17 in the first embodiment.

  That is, the power usage monitoring device 40 includes a processing unit 41 that performs overall control and monitoring of each component, a clock unit 42 that measures the date and time, and a power amount acquisition unit 43 that acquires a power amount measured by the power meter 25. . In addition, the power usage monitoring device 40 includes an actually measured power storage unit 44 that stores the amount of power acquired by the power amount acquisition unit 43 in association with the date and time that the clock unit 42 measures, and the entire consumer 23 is in a predetermined period. An estimated power storage unit 45 that stores an estimated range of the amount of power to be received in advance is provided. Furthermore, the power usage monitoring device 40 compares the measured value of the power amount for a predetermined period stored in the measured power storage unit 44 with the estimated range of the power amount for the predetermined period stored in advance in the estimated power storage unit 45. An abnormality determination unit 46 is provided. The power usage monitoring device 40 also includes a notification unit 47 that notifies abnormality information when the abnormality determination unit 46 determines that an abnormality has occurred.

  With the above-described configuration, the power usage monitoring device 40 acquires the amount of power measured by the power meter 25 for each customer 23 that is supplying power from the secondary side of the transformer 22. Moreover, the electric energy acquisition part 43 totals the electric energy for every consumer 23 acquired from each electric power meter 25, and calculates | requires the total amount of the electric energy which the whole consumer 23 received. The total amount of power obtained by the power amount obtaining unit 43 is stored in the measured power storage unit 44 together with the date and time being measured by the clock unit 42.

  The amount of power stored in the measured power storage unit 44 is compared with the estimated range of the amount of power stored in the estimated power storage unit 45 in the abnormality determination unit 46 to determine whether there is an abnormality in the power supply. When the abnormality determination unit 46 is detected, the notification unit 47 notifies the occurrence of the abnormality.

  In the present embodiment, since the power meter 25 has a communication function, the notification unit 47 is provided with a communication function for communicating with the power meter 25, and the power meter 25 notifies the display of abnormal information by a light emitting element or a buzzer. You may make it perform. Further, the power meter 25 may be provided with a liquid crystal display, an organic EL display, or the like to notify abnormality information.

  By the way, since the total amount of power obtained by the power amount acquisition unit 43 is the total amount of power measured by the power meter 25, when the power is illegally used from the primary side of the power meter 25, the power amount The amount of power obtained by the acquisition unit 43 does not include the amount of power used illegally. Therefore, if power is used illegally on the primary side of the power meter 25, the actually measured power amount is considered to be smaller than the estimated range. Therefore, in the abnormality determination unit 46, if the amount of power stored in the measured power storage unit 44 is smaller than the estimated range of power stored in the estimated power storage unit 45, the power is illegal on the primary side of the power meter 25. It is determined that it has been used.

  As described above, the first embodiment compares the amount of electric power supplied from the secondary side of the transformer 22 to the consumer 23 with the estimated range of the electric energy, whereas the present embodiment is different from each consumer 23. The electric energy measured by the electric power meter 25 is compared with the estimated range of electric energy. Other configurations and operations in the present embodiment are the same as those in the first embodiment.

  In the present embodiment, the configuration in which the power usage monitoring device 40 is provided separately from the power meter 25 is illustrated, but the power usage monitoring device 40 is housed in the housing of the power meter 25 of any consumer 23. Is also possible. Alternatively, it is also possible to form a communication path between the power meter 25 and the management device 30 and provide the management device 30 with the function of the power usage monitoring device 40. In this case, in the management apparatus 30, in addition to paying attention to the plurality of consumers 23 receiving power from the secondary side of the transformer 22, it is possible to arbitrarily combine the plurality of paying consumers 23.

  Furthermore, in addition to the case where the consumer 23 is a detached house, the consumer 23 may be each dwelling unit of an apartment house. When the consumer 23 is each dwelling unit of the apartment house, not only the communication between the power meter 25 and the power usage monitoring device 40 but also a part of the communication path between the power usage monitoring device 40 and the management device 30. Alternatively, power line carrier communication technology may be used. In the case of an apartment house, the power usage monitoring device 40 can be installed in an electrical room or an administrator room of the apartment house.

DESCRIPTION OF SYMBOLS 10 Power usage monitoring apparatus 11 Processing part 12 Clock part 13 Electric energy meter 14 Actual power storage part 15 Estimated power storage part 16 Abnormality determination part 17 Notification part 20 Distribution network 21 Distribution network 22 Transformer 23 Consumer 24 Electric power meter 25 Electric power meter DESCRIPTION OF SYMBOLS 30 Management apparatus 31 Communication network 40 Power usage monitoring apparatus 41 Processing part 42 Clock part 43 Power amount acquisition part 44 Power amount acquisition part 45 Estimated power storage part 46 Abnormality determination part 47 Notification part 251 Measurement part 252 Communication part

Claims (7)

An watt-hour meter that is arranged on an electric circuit that supplies power to a plurality of consumers and that measures the total amount of power that is supplied to the whole of the consumers, and an estimation range of the amount of power that the whole of the consumers consumes in a predetermined period An estimated power storage unit that stores a set of the predetermined period in advance and a state in which the total power measured by the watt hour meter exceeds the estimated range stored in the estimated power storage unit in the predetermined period is determined to be abnormal. The power usage monitoring apparatus comprising: an abnormality determination unit that performs an abnormality determination, and a notification unit that notifies abnormality information when the abnormality determination unit determines that an abnormality has occurred. A power amount acquisition unit that acquires the amount of power received for each consumer from a power meter that is disposed in each of the plurality of consumers and has a communication function; and the amount of power consumed by the entire consumer in a predetermined period An estimated power storage unit that stores a set of an estimated range and the predetermined period in advance, and a state in which the total amount of power measured by the power meter in the predetermined period is smaller than the estimated range stored in the estimated power storage unit A power usage monitoring apparatus comprising: an abnormality determination unit that determines that the abnormality is abnormal; and a notification unit that notifies abnormality information when the abnormality determination unit determines that the abnormality is abnormal.   The power usage according to claim 1, wherein the estimated power storage unit, the abnormality determination unit, and the notification unit are attached to a transformer that supplies power to the entire consumer. Monitoring device.   The power usage monitoring apparatus according to claim 1, wherein the notification unit performs notification by visual stimulation.   The power usage monitoring apparatus according to claim 1, wherein the notification unit performs notification by auditory stimulation. The notification unit, the power usage monitoring apparatus according to any one of claims 1 to 5, wherein the notifying the abnormality information with position of the power usage monitoring device to the management device through the communication network.   The power usage monitoring device according to claim 1, and a management device that communicates with the power usage monitoring device via a communication network, the power usage monitoring device passing through the communication network, A power usage monitoring system, wherein the abnormality information is notified to a management device.

Images