JP2008122158A - System for measuring electrical energy, and watt-hour meter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a system for measuring electrical energy, and a watt-hour meter for flexibly changing electric power charge, in response to changes in electric power demand. <P>SOLUTION: This system for measuring electrical energy estimates the electric power demand in the next time zone, based on environment data, such as temperature, humidity, etc., selects an electric power charge section, and measures electric energy according to the charge section. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an electric energy measuring system and an electric energy meter for measuring the electric energy used in a system under measurement.

Conventionally, watt-hour meters that measure the amount of power used by ordinary households, factories, and offices have become widespread. The watt-hour meter displays a usage amount detecting means for measuring the used power amount of the system to be measured, a control portion for editing the usage amount detected by the usage amount detecting means into data, and data edited by the control portion. And a display unit. (For example, Patent Document 1)
JP 2004-226094 A (page 10, FIG. 2)

In recent years, since air conditioners have become widespread, the power consumption in summer has become very large. For this reason, a power rate system has been introduced to increase the power rate in summer and during the day. However, even in summer, the temperature varies from day to day, and there is a case where the power demand is not high on a day when the temperature is low. However, the conventional power amount measurement system cannot flexibly change the power rate according to the demand for power that changes every moment.

An object of the present invention is to provide an electric energy measuring system and an electric energy meter that can flexibly change an electric charge according to a change in electric power demand.

  In order to achieve the above object, an electric energy measuring system according to the present invention includes an electric power demand predicting means for predicting electric power demand, and an electric power charge classification for each unit time according to the electric power demand predicted by the electric power demand predicting means. A center device comprising a power rate category selection means to select, an instruction means for instructing a power rate category determined by the power rate category selection means, a power amount measurement means for measuring the power amount of the system to be measured, A watt hour meter comprising: a metering unit that counts the power amount measured by the power amount measuring unit as a power amount per unit time in accordance with a power charge category instructed by the instruction unit of the center device. It is characterized by that.

In order to achieve the above object, the watt-hour meter according to the present invention includes a power demand prediction means for predicting power demand, and a power charge classification for each unit time according to the power demand predicted by the power demand prediction means. A power charge category selection means to select, a power charge measurement means for measuring the power consumption of the system under measurement, and a power charge selected by the power charge category selection means for the amount of power measured by the power consumption measurement means. And a metering means for summing up the amount of electric power per unit time according to the classification.

ADVANTAGE OF THE INVENTION According to this invention, the electric energy measuring system and electric energy meter which can change an electricity bill flexibly according to the change of an electric power demand can be provided.

  Examples of the present invention will be described below.

  Embodiment 1 of an electric energy measuring system according to the present invention will be described with reference to FIG.

  In FIG. 1, reference numeral 100 denotes a transmission line, which corresponds to an Internet line, a telephone line, a mobile phone line, a dedicated line, a radio wave, or the like.

Reference numerals 101, 102, and 103 denote environment measurement devices that measure temperature and humidity, and transmit temperature and humidity data as environment data to a center device 141 described later. The environmental measuring devices 101, 102, 103 are installed at important points in the town, such as utility poles in the business office of the power supply company. In FIG. 1, the system is composed of three environment measuring apparatuses 101, 102, and 103 as an example, but can be composed of four or more or less than three.

Here, the internal configuration of the environment measuring apparatus 101 will be described with reference to FIG. Note that the inside of the environment measuring apparatuses 102 and 103 has the same configuration as that of the environment measuring apparatus 101.

In FIG. 2, reference numeral 201 denotes a temperature sensor, which is composed of a temperature sensor such as a resistance temperature detector, and measures the temperature of the place where it is installed.

Reference numeral 202 denotes a humidity sensor, which is constituted by a humidity sensor made of a semiconductor or the like, and measures the humidity of the installed place.

A transmission unit 203 is composed of an interface circuit made of semiconductor or the like and a wireless communication device, and is connected to a transmission line 100 made up of an external Internet line, telephone line, mobile phone line, dedicated line, radio wave, etc., and a temperature sensor 201, the temperature / humidity data measured by the humidity sensor 202 is transmitted as environmental data to the center device 141 described later.

Next, reference numerals 111, 112, 113, 114, and 115 in FIG. 1 denote watt-hour meters that measure the amount of power used by consumers and output it as power amount data through display, transmission, or the like. Here, the electric energy data is, for example, data relating to the electric energy used for each electric charge category created by dividing the electric energy used per unit time such as one hour into different electric charge categories such as 1 to 10 with different electric charges. Say. The watt hour meters 111, 112, 113, 114, and 115 integrate and measure the amount of power used for each unit time for each power charge category. It is instructed by transmission from the center device 141, which will be described later, to which power charge category the measured power consumption for each unit time is to be integrated and measured. The electricity meters 111, 112, 113, 114, and 115 are installed in the consumers 121, 122, 123, 124, and 125 that use power. In FIG. 1, the system is composed of five watt-hour meters 111, 112, 113, 114, and 115 as an example, but can be composed of six or more or less than five. . The transmission path between the center device 141 and each watt hour meter 111, 112, 113, 114, 115 may be any of the Internet, a telephone line, a mobile phone line, a dedicated line, and a radio wave.

Here, the internal configuration of the watt-hour meter 111 will be described with reference to FIG. In addition, the inside of the watt hour meter 112, 113, 114, 115 has the same configuration as the watt hour meter 111.

In FIG. 3, reference numeral 301 denotes an electric energy measuring unit which is constituted by an analog-to-digital converter or the like, and detects the used current and voltage of the installed consumer and measures the electric energy of the system under measurement.

  A storage unit 302 is configured by a semiconductor memory such as a RAM, and stores the power amount measured by the power amount measurement unit 301 for each power rate section for each unit time zone and stores it as power amount data.

A transmission unit 303 includes an interface circuit made of semiconductor or the like and a wireless communication device, and is connected to a transmission line 100 made up of an external Internet line, telephone line, mobile phone line, dedicated line, radio wave, etc. An instruction regarding the power rate classification from the center device 141 is received.

A display unit 304 includes a liquid crystal display or the like, and displays power amount data that is a power amount for each power charge category.

A control unit 305 is configured by a microcomputer or the like. The power amount measured by the power amount measuring unit 301 is divided into power charge categories, measured, stored in the storage unit 302 as power amount data, and displayed on the display unit 304. Control to display.

Reference numerals 131, 132, 133, 134, and 135 in FIG. 1 are notification devices, such as personal computers or dedicated devices having a communication function, or television receivers or radio receivers. Display charges and inform consumers. The current power charge per unit time is instructed by transmission from the center device 141 described later. The notification devices 131, 132, 133, 134, and 135 are installed in the consumers 121, 122, 123, 124, and 125 that use electric power. In FIG. 1, the system includes five notification devices 131, 132, 133, 134, and 135 as an example, but may be configured with six or more or less than five. The transmission path between the center device 141 and each of the notification devices 131, 132, 133, 134, 135 may be any of the Internet, a telephone line, a mobile phone line, a dedicated line, and a radio wave. Consumers who use electricity grasp the current electricity rate and adjust the use of electricity.

  141 is a center device, such as a computer or a dedicated machine, which is connected to a transmission line 100 including an external Internet line, a telephone line, a mobile phone line, a dedicated line, a radio wave, etc., and is installed in a sales office of a power supply company. The

  Here, the internal configuration of the center apparatus 141 will be described with reference to FIG.

  A storage unit 401 includes a semiconductor memory such as a RAM, and stores a temperature / humidity pattern conversion table to be described later.

  A storage unit 402 includes a semiconductor memory such as a RAM, and stores a power rate classification conversion table described later.

A transmission unit 403 is configured by an interface circuit or a wireless communication device made of a semiconductor or the like, and is connected to a transmission line 100 made of an external Internet line, a telephone line, a mobile phone line, a dedicated line, a radio wave, etc., and measures the environment. It communicates with the apparatus 102,103,104, the watt-hour meter 111,112,113,114,115, and the alerting | reporting apparatus 131,132,133,134,135.

  Reference numeral 404 denotes a control unit configured by a microcomputer or the like, and a temperature / humidity pattern conversion table stored in the storage unit 401 from the environmental data of the environmental measurement apparatuses 101, 102, 103 received by the transmission unit 403, and a storage unit 402. The power rate classification is converted from the power rate category conversion table stored in, and the power rate categories to be measured are instructed to the watt hour meters 111, 112, 113, 114, 115 via the transmission unit 403.

  Next, the operation of this embodiment will be described with reference to the program configuration diagram of FIG. This program is stored in a program memory (not shown) in the control unit 404 of the center apparatus 141, and controls the operation of the control unit 404.

  The environment measuring devices 101, 102, and 103 are installed in a place suitable for measuring temperature and humidity, such as a utility pole in a power supply company, and constantly measure temperature and humidity.

The control unit 404 in the center device 141 has a clock inside. For example, at 5 minutes before the hour, the temperature / humidity at that time from the environment measurement devices 101, 102, and 103 is transmitted from the transmission unit 403 via the transmission path 100. Request to transmit data.

The transmission unit 203 of the environment measurement device 101 requested to transmit data from the center device 141 transmits the temperature data measured by the temperature sensor 201 and the humidity data measured by the humidity sensor 202 to the center device 141 via the transmission path 100. Send back. Similarly, the environmental measurement devices 102 and 103 return temperature data and humidity data to the center device 141 via the transmission line 100.

As described above, the center device 141 collects temperature / humidity data of each part in the power supply company's jurisdiction (step 501).

  Next, the control unit 404 in the center device 141 calculates the average temperature and the average humidity during the transmission based on the temperature data and the humidity data acquired from the environment measuring devices 101, 102, and 103 (step 502). .

  Next, the control unit 404 in the center device 141 converts a temperature / humidity pattern from the average temperature and the average humidity (step 503). Here, the temperature and humidity pattern is a pattern obtained from the relationship between temperature and humidity. The higher the temperature and humidity, the more uncomfortable it is for humans, so they want to operate the air conditioner. The degree of human desire to operate the air conditioner is expressed in 10 levels from A to J in relation to temperature and humidity, for example, as a temperature and humidity pattern. The temperature / humidity pattern is stored in the storage unit 401 in the center device 141 as a temperature / humidity pattern conversion table as shown in FIG. The control unit 404 obtains a temperature / humidity pattern with reference to the temperature / humidity pattern conversion table stored in the storage unit 401 based on the average temperature and the average humidity. For example, when the average temperature is 33 ° C. and the average humidity is 75%, the temperature / humidity pattern is the pattern H.

Next, the control unit 404 in the center device 141 converts a power charge category from the temperature / humidity pattern and a time zone in which power is used (step 504). Here, the power rate category is a category for determining the power rate determined from the temperature / humidity pattern determined from the relationship between temperature and humidity and the time zone in which the power is used. Humans want to operate an air conditioner when the temperature and humidity are high, but power is naturally used for equipment other than the air conditioner, and the demand for power is not determined only by the operating rate of the air conditioner. For example, power demand is tight during the day and during meals, and relatively little during the night.

Then, it is desirable to have a fee system that raises the electricity charge during the time when power supply is tight and reduces the electricity charge during the time when demand is low. A category relating to power demand expressed in 10 levels from 1 to 10 derived from the relationship between the temperature and humidity pattern and the power usage time zone is defined as a power rate category. The power charge category is stored in the storage unit 402 in the center device 141 as a power charge category conversion table as shown in FIG. Based on the temperature / humidity pattern and the time zone in which the power is used, the control unit 404 refers to the power rate category conversion table stored in the storage unit 402 to obtain the power rate category. For example, at 10:55, 5 minutes before 11:00, when the average temperature calculated based on the environmental data transmitted from the environmental measurement devices 101, 102, 103 is 33 ° C. and the average humidity is 75%, If the temperature / humidity pattern is H and the unit time is 1 hour, the next power usage time zone is 11:
The power charge classification from 00 to 12:00 is classification 6. Note that the power charge per unit power amount becomes expensive in the order of the power charge category from 1 to 10.

Next, the control unit 404 in the center apparatus 141 sets power charge classifications to be measured in the next time zone from the transmission unit 403 to the watt hour meters 111, 112, 113, 114, 115 via the transmission line 100. Instruct (step 505). For example, the control unit 404 in the center apparatus that has determined that the power charge category is 6 at 10:55 is set to each of the watt-hour meters 111, 112, 113, 114, and 115 from 11:00 to 12: 00 instructs to measure in the electricity charge category 6.

The watt hour meter 111 instructed by the center device 141 for the power charge category to be measured receives the power charge category via the transmission unit 303, and the control unit 305 measures the power amount measured by the power calculation unit 301 according to the power charge category. Are stored in the storage unit 302 for each power charge category. Further, it is displayed on the display unit 304 for each power charge category. FIG. 8 shows an example of the relationship between the time zone and the power charge category when the unit time is 1 hour. As shown in FIG. 9, the storage unit 302 stores the amount of power used for each power charge category divided into the last two months, the previous month, and the current month. In FIG. 9, the amount of power used for each power charge category for this month is in the middle of the month and is being metered.

  Similarly, the watt hour meters 112, 113, 114, and 115 measure the amount of electric power in accordance with the instruction of the electric power charge category according to the instruction of the electric power charge category.

Next, the control unit 404 in the center device 141 sends the notification devices 131, 132, 133, 134, installed in the respective consumers 121, 122, 123, 124, 125 via the transmission line 100 from the transmission unit 403. The power rate classification used in the next time zone is notified to 135 (step 506). The notification is performed by e-mail or the like. For example, the control unit 404 in the center apparatus, which is determined to be in the power charge category 6 at 10:55, notifies each of the notification devices 131, 132, 133, 134, 135 at the next time zone. From 11:00 to 12:00, it is notified that the metering is performed in the power charge category 6.

The notification devices 131, 132, 133, 134, and 135 that have been notified of the power charge category to be displayed from the center device 141 display the power charge category on the display unit and notify the customer.

The operations in steps 501 to 506 are sequentially performed 5 minutes before the start of the unit time. For example, when the unit time is 1 hour, the operations of steps 501 to 506 are performed 5 minutes before each time, and each watt-hour meter performs power consumption in the next time zone according to the power charge category instructed from the center device 141. Perform the weighing operation.

If this embodiment is used, it is possible to change the power charge for each day and each time. Also, according to the temperature and humidity that changes from time to time, the power demand of air conditioners, etc. is predicted, and the power charges in the time zone where the power demand is expected to be large are set to be expensive, and the power charges in the time zone with low demand are set to be low Is possible. Furthermore, by displaying how much the electricity charge for the current time zone is on the notification device, it is possible to inform the consumer of the electricity charge and to educate energy conservation by recognizing the electricity charge to the consumer. Is possible.

  As described above, by using the present embodiment, it is possible to provide an electric energy measurement system that can flexibly change an electric charge according to a change in electric power demand.

  A second embodiment of the watt-hour meter according to the present invention will be described with reference to FIG. The difference between the second embodiment and the first embodiment is that in the first embodiment, the temperature and humidity are measured by the environment measuring devices 101, 102, 103, the power rate classification is selected by the center device 141, and each watt hour meter is selected. However, in Example 2, the watt hour meter has an environment measurement unit that measures temperature and humidity. It is a point that can be selected.

  In FIG. 10, 600 is a watt-hour meter main body.

Reference numeral 601 denotes an environment measurement unit that measures temperature and humidity, and transmits data related to temperature and humidity as environment data to a control unit 609 described later. The environment measurement unit 601 includes a temperature sensor 602 that measures the air temperature at the place where it is installed, and a humidity sensor 603 that measures the humidity at the place where it is installed.

  A storage unit 604 includes a semiconductor memory such as a RAM, and stores a temperature / humidity pattern conversion table.

  A storage unit 605 includes a semiconductor memory such as a RAM, and stores a power rate classification conversion table.

Reference numeral 606 denotes an electric energy measuring unit which is configured by an analog-digital converter or the like, and detects the electric current and voltage of the installed consumer and measures the electric energy of the system under measurement.

  A storage unit 607 is configured by a semiconductor memory such as a RAM, and stores the power amount measured by the power amount measurement unit 606 for each power rate section for each unit time zone and stores it as power amount data.

A display unit 608 includes a liquid crystal display or the like, and displays power amount data that is the amount of power for each power charge category.

A control unit 609 is configured by a microcomputer or the like. The power amount measured by the power amount measuring unit 606 is divided into power charge categories and measured, and is stored in the storage unit 607 as power amount data, and is displayed on the display unit 608. Control to display.

  Next, the operation of this embodiment will be described. The environment measurement unit 601 always measures temperature and humidity.

The control unit 609 has a clock inside, and acquires temperature / humidity data at that time from the environment measurement unit 601 at, for example, 5 minutes before every hour.

  Next, the control unit 609 obtains a temperature / humidity pattern with reference to the temperature / humidity pattern conversion table stored in the storage unit 604 based on the temperature / humidity data.

Next, the control unit 609 refers to the power rate category conversion table stored in the storage unit 605 based on the temperature / humidity pattern and the time zone in which the power is used, and obtains the power rate category.

Thereafter, the control unit 609 performs an operation of measuring the amount of power measured by the power calculation unit 606 in accordance with the power charge category, and stores it in the storage unit 607 for each power charge category. Further, it is displayed on the display unit 608 for each power charge category.

This operation is sequentially performed 5 minutes before the start of the unit time. For example, when the unit time is 1 hour, the above-described operation is performed 5 minutes before each time, and the control unit 609 performs the power amount measurement operation in the next time zone according to the determined power charge category.

If this embodiment is used, it is possible to change the power charge for each day and each time. Also, according to the temperature and humidity that changes from time to time, the power demand of air conditioners, etc. is predicted, and the power charges in the time zone where the power demand is expected to be large are set to be expensive, and the power charges in the time zone with low demand are set to be low Is possible.

As described above, by using the present embodiment, it is possible to provide a watt-hour meter that can flexibly change a power rate according to a change in power demand.

The system block diagram which shows the structure of Example 1 of the electric energy measuring system by this invention. The internal block diagram which shows the structure of the environment measuring apparatus of Example 1 by this invention. The internal block diagram which shows the structure of the watt-hour meter of Example 1 by this invention. The internal block diagram which shows the structure of the center apparatus of Example 1 by this invention. The program block diagram which shows the structure of the program of Example 1 by this invention Temperature / humidity pattern conversion table for determining the temperature / humidity pattern of Example 1 according to the present invention. Electricity rate category conversion table for determining the electricity rate category of Embodiment 1 according to the present invention The figure which shows an example of the electric power charge classification of the 1st of Example 1 by this invention The data memorize | stored in the memory | storage part in the watt-hour meter of Example 1 by this invention The block diagram which shows the structure of Example 2 of the watt-hour meter by this invention

Explanation of symbols

100 Transmission path 101, 102, 103 Environmental measuring device 111, 112, 113, 114, 115 Electricity meter 121, 122, 123, 124, 125 Consumer 131, 132, 133, 134, 135 Notification device 141 Center device 201 Temperature Sensor 202 Humidity sensor 203 Transmission unit 301 Electric energy measurement unit 302 Storage unit 303 Transmission unit 304 Display unit 305 Control unit 401 Storage unit 402 Storage unit 403 Transmission unit 404 Control unit 600 Energy meter body 601 Environmental measurement unit 602 Temperature sensor 603 Humidity Sensor 604 Storage unit 605 Storage unit 606 Electric energy measurement unit 607 Storage unit 608 Display unit 609 Control unit

Claims (11)

A power demand forecasting means for forecasting power demand;
A power charge category selection means for selecting a power charge category for each unit time according to the power demand predicted by the power demand prediction means;
A center device comprising instruction means for instructing a power charge category determined by the power charge category selection means;
An energy measuring means for measuring the energy of the system under measurement;
A watt hour meter comprising: a metering unit that counts the power amount measured by the power amount measuring unit as a power amount per unit time in accordance with a power charge category instructed by the instruction unit of the center device. A power measurement system characterized by that. An environmental measuring means for measuring environmental conditions around power consumers and creating environmental data;
An environmental measurement device comprising a transmission means for transmitting environmental data created by the environmental measurement means;
A power demand prediction means for predicting a power demand based on environmental data transmitted by the environmental measurement device;
A power charge category selection means for selecting a power charge category for each unit time according to the power demand predicted by the power demand prediction means;
A center device comprising instruction means for instructing a power charge category determined by the power charge category selection means;
An energy measuring means for measuring the energy of the system under measurement;
A watt hour meter comprising: a metering unit that counts the power amount measured by the power amount measuring unit as a power amount per unit time in accordance with a power charge category instructed by the instruction unit of the center device. A power measurement system characterized by that. An environmental measuring means for measuring environmental conditions around power consumers and creating environmental data;
An environmental measurement device comprising a transmission means for transmitting environmental data created by the environmental measurement means;
A power demand prediction means for predicting a power demand based on environmental data transmitted by the environmental measurement device;
A power charge category selection means for selecting a power charge category for each unit time according to the power demand predicted by the power demand prediction means;
A center device comprising instruction means for instructing a power charge category determined by the power charge category selection means;
An energy measuring means for measuring the energy of the system under measurement;
A watt hour meter comprising: a metering unit that counts the power amount measured by the power amount measuring unit as a power amount per unit time in accordance with a power charge category instructed by the instruction unit of the center device;
A power amount measurement system comprising: a notification device provided with a notification unit that is installed in a power consumer and notifies a power consumer of a power rate category instructed by the instruction unit of the center device. 4. The power amount measurement system according to claim 1, wherein the power demand prediction unit predicts power demand from at least one measurement value of temperature and humidity. 5. 4. The electric energy measurement system according to claim 1, wherein the power demand prediction means includes a temperature / humidity pattern conversion table representing a correlation between temperature and humidity. 6. The power charge category selection means comprises a power charge category conversion table for determining a power charge category from a relationship between a temperature / humidity pattern selected by the temperature / humidity pattern conversion table and a time zone. The electric energy measurement system described. A power demand forecasting means for forecasting power demand;
A power charge category selection means for selecting a power charge category per unit time according to the power demand predicted by the power demand prediction means;
An energy measuring means for measuring the energy of the system under measurement;
And a metering unit that aggregates the power amount measured by the power amount measuring unit as a power amount per unit time in accordance with the power rate category selected by the power rate category selecting unit. Electricity meter. An environmental measuring means for measuring environmental conditions around power consumers and creating environmental data;
Power demand prediction means for predicting power demand based on the environmental data created by the environment measurement means;
A power charge category selection means for selecting a power charge category for each unit time according to the power demand predicted by the power demand prediction means;
An energy measuring means for measuring the energy of the system under measurement;
And a metering unit that aggregates the power amount measured by the power amount measuring unit as a power amount per unit time in accordance with the power rate category selected by the power rate category selecting unit. Electricity meter. The watt-hour meter according to any one of claims 7 to 8, wherein the power demand prediction means predicts a power demand from at least one measured value of temperature and humidity. The watt-hour meter according to any one of claims 7 to 8, wherein the power demand prediction means includes a temperature / humidity pattern conversion table representing a correlation between temperature and humidity. 11. The power charge category selection means comprises a power charge category conversion table for determining a power charge category from a relationship between a temperature / humidity pattern selected by the temperature / humidity pattern conversion table and a time zone. The watt hour meter described.

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