JP2010243511A - Wattmeter, display terminal for consumed electric power and control program for electric power measurement - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wattmeter which can easily achieve an operation at the time of a change of a contract. <P>SOLUTION: The wattmeter includes: a measurement pattern storing means 1c for storing a measurement pattern meeting a using time zone of electric power; an electric power storing means 1d for each time zone for distributing a whole day electric power to the time zones respectively every time that the whole day electric power reaches a prescribed measurement unit, in accordance with the measurement pattern stored in the measurement pattern storing means when a measuring function control means 1f for deciding whether or not an electric power for each time zone needs to be calculated decides that the electric power for each time zone needs to be calculated and storing the electric power for each time zone calculated by an electric power calculating means 1i for each time zone for calculating the electric power for each time zone; a display part 120 for displaying the whole day electric power stored in a whole day electric power storing means 1a and the electric power for each time zone stored in the electric power storing means for each time zone when it is decided that the electric power for each time zone needs to be calculated; and a setting means 1j for changing a necessity or unnecessity of calculation of the electric power for each time zone stored in a measuring function storing means in accordance with an external command. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a power meter, a power consumption display terminal, and a power metering control program, and more particularly, a power meter and communication for calculating a power consumption according to a contract between a power consumer and a power supplier. The present invention relates to a power consumption display terminal that obtains a measured value from a power meter via means and calculates a power consumption, and a power meter control program that controls the power meter and the power consumption display terminal.

  2. Description of the Related Art Conventionally, an electric power metering system that measures electric energy by season and time zone is known. An example of such a power metering system is shown in FIG. This power metering system includes a power supply unit 10, a voltage / current detection unit 20, a power calculation circuit 30, a CPU 40, an LCD display 50, a communication circuit 60, and a peripheral circuit 70.

  The power supply unit 10 converts AC power supplied from a power supply facility (not shown) into DC power having a voltage level of an electronic circuit used inside the power metering system. The DC power output from the power supply unit 10 is supplied to electronic circuits (power calculation circuit 30, CPU 40, LCD display 50, communication circuit 60, and peripheral circuit 70) constituting the power metering system.

  The voltage / current detection circuit 20 includes a current transformer 21 and a step-down circuit 22. The current transformer 21 reduces the current of the AC power supplied from the power supply facility to the current level of the electronic circuit and supplies it to the power calculation circuit 30. The step-down circuit 22 reduces the voltage of the AC power supplied from the power supply facility to the voltage level of the electronic circuit, and supplies it to the power calculation circuit 30.

  The power calculation circuit 30 calculates power by multiplying the current supplied from the current transformer 21 and the voltage supplied from the step-down circuit 22, and generates a number of pulse signals proportional to the calculated power. In this case, normally, a pulse signal is generated at a rate of 1000 pulses for 1 kWs of power (1 pulse for 1 Ws of energy = 3600 pulses for 1 Wh of energy). The pulse signal generated by the power calculation circuit 30 is sent to the CPU 40 as a measurement pulse.

  The CPU 40 includes a clock mechanism 41, a supply and demand calendar 42, a sorting unit 43, and a time zone memory 44.

  The clock mechanism 41 measures the current time. The current time measured by the clock mechanism 41 is referred to by the sorting unit 43. The supply and demand calendar 42 stores information defining a measurement pattern (number of sections). The measurement pattern is composed of, for example, 12 patterns in which weekdays, Saturdays, Sundays and holidays are combined for each of the four seasons.

Separating unit 43, a pulse signal from the power calculation circuit 30, based on the metric pattern from the current time and demand calendar 42 from the clock mechanism 41, the first time period memory 4 ₁ to 6 hours band memory 44 ₆ Sort to either. For example, by referring to the clock mechanism 41 and supply calendar 42, when it is judged is 18 o'clock on weekdays summer, and so on distributed to ₂ second time zone memory 44.

Time zone memory 44 is composed of one day (24 hours) the first time period memory 44 ₁ to 6 hours band memory 44 ₆ corresponding to each of the segmented time zone six. Each of the first time period memory 44 ₁ to 6 hours band memory 44 _6, the metering pulses distributed by fractional portion 43 cumulatively adds (integrated), and stores this example by digitizing the weighing unit 1Wh. Therefore, when viewed from kWh, which is a unit of measurement used for power trading, the integrated power amount is calculated with accuracy to the third decimal place.

Meter reading time band memory 46, a time zone the first time period memory 44 ₁ to 6 hours zone first meter reading time band memories 46 ₁ to 6 meter reading time band memory 46 which correspond to the memory 44 ₆ in the memory 44 _It consists of _six . The meter reading time zone memory 46 copies the contents of the time zone memory 44 when the measurement is confirmed, and is used for calculation of the power rate.

Note that each of the first time period memory 44 ₁ to 6 hours band memory 44 _6, power consumption may also be stored are quantified in the metering unit of 10 Wh. In this case, when viewed from kWh, which is a unit of measurement used for power trading, the integrated power amount is calculated with accuracy to the second decimal place. Whether to measure (calculate to the third decimal place) of 1 Wh or to measure (calculate to the second decimal place) of 10 Wh depends on the type of power transaction.

Display section 50, time charging force the contents stored in the first time period memory 44 ₁ to 6 hours band memory 44 ₆ and the first meter reading time band memories 46 ₁ to 6 meter reading time band memory 46 ₆ As a selective display. The display unit 50 displays the current date, time zone, and the like in addition to the amount of power for each time zone.

  The communication circuit 60 transmits the measurement value measured by the power metering system to the center via a communication line (not shown), or performs various settings and change of settings from the center to the power metering system via a communication line (not shown). Used for. The peripheral circuit 70 includes a setting button for performing various settings in the power metering system, a pulse output circuit for outputting the above-described metering pulse to the outside, and the like.

  As a related technique, there is known an electronic watt-hour meter in which a time setting content such as a metering time zone, a load switch control time, and a summer time shift amount is shown in an easy-to-confirm form (for example, Patent Document 1). reference). This electronic watt-hour meter is displayed on a plurality of watt-hour meters that measure the amount of power in different metering time zones, a power amount display means that displays the measurement results of the plurality of watt-hour meters, and a power amount display means. A display time zone display means for displaying which measurement time zone the current measurement result belongs to, a current time display means, a measurement time zone number display means for displaying the current measurement time zone, and an electric energy display means In the electronic watt-hour meter, which displays the result of power metering in any one of a plurality of metering time zones in sequence or selected, the metering displayed on the power meter display means on the display time zone display means A display time zone number display portion for displaying the time zone number, a clock face portion for displaying the time, and a time zone display portion for illustrating the measurement time zone corresponding to the time displayed on the clock face portion; It has.

  By the way, in the conventional watt-hour meter and the power meter reading method, various forms exist according to the contract between the power consumer side that uses the power and the power supplier (electric power company) side that supplies the power. To do.

  First, power trading can be broadly divided into contracts that measure monthly power consumption by season and time zone (hereinafter referred to as “seasonal contracts”), and contracts that only measure monthly power consumption ( There are two types of contracts (hereinafter referred to as “actual contracts”).

  The electronic watt-hour meter installed at the customer of the actual amount contract has a type that does not have an external communication function (no communication circuit) as shown in FIG. There are two types of types having a communication function with the outside as shown in FIG.

  On the other hand, the watt-hour meter installed at the customer of the contract by season sets the measurement pattern according to the charge system as shown in Fig. 23 in the supply and demand calendar, and the monthly power consumption and the maximum demand power are set accordingly. Seasonal measuring instruments are used to measure each time zone. Alternatively, as shown in FIG. 24, the actual amount controller with a communication function as shown in FIG. 22 (b) is combined with a power consumption display terminal, and the monthly usage amount is the actual amount controller. The amount of power used is measured by the power consumption display terminal in accordance with the set supply and demand calendar and is displayed respectively.

  In this way, only the monthly usage is measured with the meter for the actual amount contract, and the monthly usage is measured according to the time zone with the meter for the contract according to the season, and the monthly usage with one meter. There is no instrument that measures and displays the amount of usage for each hour of the month.

  In addition, even when the power supplier is a PPS (Power Producer and Supplier), there are cases where measurement is not performed for each time zone and for each time zone. As shown in FIG. 23, an actual amount controller with a communication function and a power consumption display terminal are used.

  In addition, electric power companies usually perform meter reading work once a month in order to grasp the amount of electric power used. There are two types of meter reading methods: automatic meter reading using various communication networks and on-site meter reading by the meter reader on the watt-hour meter on-site. Various methods are used, such as inputting into a dedicated device called a handy terminal. Whether the meter reading is automatically performed, the field meter reading, or the type of the field meter reading is currently selected depending on various situations.

  In addition, the watt hour meter measures and displays a plurality of items such as power amount, reactive power amount, and maximum demand power, and the display method is a type that can display a plurality of items simultaneously on one screen. Shifting to a cyclic display type in which the two items are automatically switched and sequentially displayed at a predetermined cycle.

  For this reason, when the contract when the instrument is installed on the power consumer side is changed after that, it may be necessary to replace the instrument, install a power consumption display terminal, or change the setting. At the time of such changes, the time when the watt-hour meter is applied differs from the time when the new fee system is applied after various settings are made. There has been a problem that the processing for doing so becomes complicated. Therefore, by properly setting the indicated value at the time of instructing the start of the application of the new rate system as the starting point for calculating the amount of energy used based on the supply and demand calendar, the amount of energy used from the start of the operation of the rate system can be properly grasped. In addition, a power metering system that enables smooth fee trading has been proposed. (For example, refer to Patent Document 2).

JP 2001-183400 A Japanese Patent Laying-Open No. 2003-167005 (paragraph numbers 0052 to 0065, FIG. 1)

  By the way, in recent years, the rate system has been diversified for load leveling and effective use of energy, and along with this, electricity transactions are carried out at 30-minute measurement values (hereinafter referred to as “30-minute values”). Various needs have arisen, such as wanting to do electricity trading, wanting to carry out power transactions with a measured value for only one month regardless of the time zone.

  However, in the above-described conventional power metering system, the pulse signal generated by the power calculation circuit is metered separately according to the season and the time zone, and therefore the value for 30 minutes cannot be metered. As a result, there is a problem that power trading with a value of 30 minutes cannot be performed.

  In addition, since the pulse signal from the power calculation circuit 30 is directly sent to the corresponding time zone memory and digitized for each time zone in the time zone memory, there are less than 3600 pulses in each time zone. It was a situation that was. For this reason, when the pulses less than 3600 pulses in each time zone are summed, there are cases where the number exceeds 3600 pulses.

  In addition, the conventional power metering system cannot meet the above-mentioned needs. Therefore, when a customer who has concluded a metering contract for each season / time zone changes the metering contract to supply from PPS. The instrument needs to be replaced. Regarding the replacement of instruments, it is necessary to obtain a lead time of at least one month, such as the need to obtain certification.

  In addition, when a power metering system that combines a power meter with a power meter is used, if the subscription rate of the contract agreement (measuring contract by season / time zone) increases, the power meter terminal There is a problem that the installation cost cannot be ignored and the measurement cost becomes high.

  In addition, when the number of time zone categories of customers who have entered into a measurement contract by season / time zone has been changed (for example, changed from 6 hours to 4 hours or vice versa) There are the following problems concerning the display of the numerical value of the number. That is, as shown in FIG. 21, when the number of time zone segments is increased from 4 to 6 due to a contract change, the initial value of the increased time zone segment is displayed on the current screen but not on the meter reading screen (FIG. 21). Therefore, there may be doubts between the customer and the power supplier in determining the monthly power consumption. Even when the initial value is displayed, the accumulated value up to the previous time (for example, the value when operated for the error test at the time of verification) remains in the time zone memory of the increased time zone segment ( (It is indicated by the “?” Symbol in the figure), so the same question may arise.

  Furthermore, when the unit of measure is changed (changed from Wh to 10 Wh, or vice versa), the handling of digits that are used or not used due to the change is the same as the change in the number of time zone segments described above. Problems arise.

  In addition, since conventional watt-hour meters are made for real-time contracts and seasonal contracts, the contract details are different when customers of actual contracts change to seasonal contracts. If it is changed, there is a problem that the instrument needs to be replaced due to addition of a measurement item or the like.

  For example, if the contract at the time of installation is an actual quantity contract and a real quantity controller as shown in FIG. 22 (a) is installed, if it becomes necessary to change to a seasonal contract, the actual quantity Replace the controller with a seasonal meter as shown in FIG. 23 or an actual quantity controller with a communication function as shown in FIG. 24, and use a function that distributes the measured value to each time zone It is necessary to measure electricity according to the time zone by attaching a power display terminal.

  In addition, even if a seasonal meter as shown in Fig. 23 is installed, if the number of time zone segments increases due to contract changes, the meter is replaced if there is not enough power memory per hour There is a need to. In order to replace the instrument, it is necessary to expect a lead time of at least one month for the procurement of the instrument, and a power outage is required for the construction. Furthermore, since there are many types of instruments, there is a problem that operations such as instrument management increase.

  Furthermore, since the electric power consumer side can choose an electric power supply, an electric power supplier, such as an electric power company and PPS, may be decided by bidding every year. When the power supplier becomes PPS, based on the contract details, for example, power consumption and power every 30 minutes are required. For this reason, if you have a contract with the power company to measure by season, when you change the power supplier from PPS to PPS, measure the power usage and power every 30 minutes However, if the meter cannot measure every 30 minutes, the meter must be replaced as described above. In addition, even a meter capable of weighing every 30 minutes is required to change the metering items of the meter, change the supply and demand calendar, etc., and there is a demand to save this work.

  In the case of a cyclic display type instrument, it is possible to give the instrument a function to measure by time zone by expanding the memory capacity and developing software, so the instrument assumes various needs, It can be developed with diversity. However, there are fractions that are metered but not displayed on the meter, and the monthly usage does not always match the sum of the monthly increments by time, so the monthly usage and usage by time Care must be taken when weighing and displaying the same instrument with the same instrument and using it for trading.

  In addition, when measuring the amount of power used, it is necessary to measure with a meter that has passed the verification test stipulated by the Measurement Act, so you must pay the required verification fee and use a meter that has passed the verification. For this reason, in order to avoid the replacement of instruments due to contract changes and to save labor on inventory management by reducing the types of instruments, the user must receive a uniform test in advance as long as the verification fee is not excessively burdened. At the time of attaching, when measuring and displaying up to weighing items by time zone that are not necessary for the contract, there is a problem that the meter reading time becomes long and the possibility of erroneous use amount recording increases.

  As described above, when the contract is changed, complicated work such as replacement of a meter, installation of a new power consumption display terminal, and change of various settings is required, which increases the measurement cost.

  In addition, the meter reading method records the power consumption when the meter is read in the field by looking at the display on the meter and the power consumption display terminal, so the display order on the meter and the power consumption display terminal records the measured value. It is desirable to match the order in which they are performed. However, since the meter user can freely determine the order in which the measured values are recorded, there are various recording orders. For example, as shown in FIG. Power meter, maximum demand power and cumulative maximum demand power → force measurement (for power factor measurement) active power, force measurement reactive power and power factor → (current location display screen) In some cases, a handy terminal that records usage in the order of “amount of power per time period → active power for power factor measurement → reactive power for power factor measurement → maximum demand power → cumulative maximum demand power → power factor” may be used.

  In this case, since the display is not switched in the input order of the handy terminal, it is necessary to wait for the input of the handy terminal until the display screen of the meter or the power consumption display terminal is updated. For example, after inputting “force measurement reactive power” according to the display, in order to input “maximum demand power” next time, it is necessary to wait until “maximum demand power” is displayed. is there. Further, since the recording order and the display order are different, there is a possibility that different items are input.

  The present invention has been made to solve the above-described problems, and a first object of the present invention is to provide a watt-hour meter and a power consumption display terminal that can facilitate work when changing a contract. And providing an electric energy metering control program. Furthermore, the second problem of the present invention is to provide a power meter, a power consumption display terminal, and a power metering control program capable of providing easy-to-understand display.

  The watt-hour meter according to the first aspect of the invention is a power amount calculation means for calculating the total amount of power by measuring and accumulating the amount of power, and a total amount of power for storing the total amount of power calculated by the power amount calculation means. Ability pattern storage means, a measurement pattern storage means for storing a measurement pattern according to a power usage time period determined by a contract between a power consumer and a power supplier, and necessity of calculation of power consumption by time zone Weighing function storage means for storing, weighing function control means for determining whether or not it is necessary to calculate a power amount for each time zone based on the contents stored in the weighing function storage means, and for each time zone by the weighing function control means When it is determined that it is necessary to calculate the electric energy, the total daily electric energy is classified by time period every time the total daily electric energy becomes a predetermined measurement unit according to the measurement pattern stored in the measurement pattern storage means. Share Power amount calculation means for each time zone that calculates the power amount for each time zone, power amount storage means for each time zone that stores the power amount for each time zone calculated by the power amount calculation means for each time zone, Displayed in the all-day power storage means when it is determined by the display means for displaying the daily power amount and the hourly power amount, and calculation of the hourly power amount by the metering function control means. A display unit for displaying the total daily power amount and the hourly power amount stored in the hourly power amount storage means, and the time zone stored in the weighing function storage means based on an external command And setting means for changing whether or not the calculation of the electric energy is necessary.

  The watt-hour meter according to the second invention is the watt-hour meter according to the first invention, wherein the setting means further changes the measurement pattern stored in the measurement pattern storage means by an external command. And

  A watt-hour meter according to a third invention is the watt-hour meter according to the first or second invention, wherein the display unit includes a display pattern storage means for storing a display pattern for defining a display order of display items. The display items are displayed in the order according to the display patterns stored in the display pattern storage means, and the setting means further displays the display patterns stored in the display pattern storage means based on an external command. It is characterized by being changed.

  A watt-hour meter according to a fourth invention is the watt-hour meter according to any one of the first to third inventions, wherein the setting means measures in the watt-hour calculation means according to a destination inputted from the outside. When the unit is changed and a measurement pattern is input from the outside, the measurement pattern stored in the measurement pattern storage means is changed, and the time zone defined by the measurement pattern stored in the measurement pattern Based on the required number of storage areas of the separate electric energy storage means and the number of storage areas of the electric energy storage by time period provided in advance by the electric energy storage means by time zone, It is characterized by determining necessity.

  The power consumption display terminal according to the fifth aspect of the invention is a communication means for receiving the total daily power obtained by measuring and accumulating the power, and a total power for storing the total daily power received by the communication means. Daily power storage means, measurement pattern storage means for storing a measurement pattern according to the power usage time determined by a contract between the power consumer and the power supplier, and calculation of the power consumption by time zone A weighing function storage means for storing the error, a weighing function control means for determining whether or not it is necessary to calculate a power amount for each time zone based on the contents stored in the weighing function storage means, and a time zone by the weighing function control means. When it is determined that it is necessary to calculate another power amount, when the all-day power amount is distributed according to the time zone according to the measurement pattern stored in the measurement pattern storage means, The power consumption calculation unit for each band, the power storage unit for each time zone that stores the power amount for each time zone calculated by the power consumption calculation unit for each time zone, and the total daily power amount and the power consumption for each time zone are displayed. And when the measurement function control means determines that it is necessary to calculate the hourly electric energy, the total daily electric energy stored in the all-day electric energy storage means and the hourly electric energy Based on a display unit that displays the power amount for each time zone stored in the storage means and a command from the outside, the necessity of calculation of the power amount for each time zone stored in the weighing function storage means is changed. Setting means, and the display unit includes display pattern storage means for storing a display pattern for defining a display order of display items, and displays the display patterns in an order according to the display patterns stored in the display pattern storage means. Table of items And performing.

  An electric energy metering control program according to a sixth aspect of the present invention is an electric energy metering control program for calculating an amount of electric power used according to a contract between an electric power consumer and an electric power supplier. When it is determined that the calculation is not necessary according to the procedure for calculating the total amount of electric power and the instruction for the necessity of calculating the amount of electric power by time zone sent from the outside, the calculated total amount of electric power is displayed. Procedure and, when it is determined that the calculation of the electric energy by time zone is necessary, the measured electric energy is distributed by time zone according to the stored measurement pattern, and the cumulative value by time zone is calculated and stored. And a procedure for displaying the stored electric power by time zone.

  In a seventh aspect of the invention, in the electric energy metering control program according to the sixth aspect of the invention, when a display pattern that defines the display order of display items is designated from the outside, the display pattern is displayed in the order according to the display pattern. The computer may further execute a procedure for displaying display items.

  The watt-hour meter according to the eighth invention is a power meter control program according to the sixth or seventh invention, wherein the watt-hour meter is determined by a contract between a power consumer and a power supplier and is in accordance with a power usage time zone. When a measurement pattern is selected, a procedure for acquiring a predetermined number of time zone segments, a procedure for storing the selected measurement pattern if the acquired number of time zone segments is zero, and When the acquired number of time zone segments is other than zero and the power consumption display terminal is used, a procedure for setting that the calculation of the power consumption by time zone is unnecessary and storing the measurement pattern And when the obtained time zone division number is other than zero and the power consumption display terminal is not used, if the measurement pattern is within the range of the time zone division number, the power amount by time zone Need to calculate A procedure for storing the metering pattern sets a certain effect, characterized in that it further executes the computer.

  According to the watt-hour meter and the used electric energy display terminal according to the first to fifth inventions, the calculation function control unit performs each of the actual quantity contract, the seasonal contract, and the supply contract by PPS according to an instruction from the outside. And corresponding processing functions are realized. As a result, it is possible to use one instrument for both real-scale contracts and seasonal contracts, so we can obtain a test assuming future multi-time measurement needs, and have multiple functions according to the contract details. By controlling the metering function of the type watt-hour meter, it is possible to reduce the types of meters and save labor for inventory management of the meters, and to eliminate the need to replace the instruments when the contract is changed.

  In addition, when changing the setting, information such as a measurement unit prepared in advance is automatically selected according to an instruction from the outside, so that the work can be facilitated. In this way, it is possible to reduce the weighing cost by reducing the number of exchanges of instruments due to contract changes and facilitating the change work.

  Further, the display pattern can be changed by an external command. As a result, the meter reading values can be displayed in the necessary order, and erroneous input of the on-site meter reading can be prevented.

  Furthermore, according to the electric energy metering control program according to the sixth to eighth inventions, the same operations and effects as the watt hour meter and the used electric energy display terminal according to the first to fifth inventions described above can be obtained.

It is a block diagram which shows the structure of the electric power metering system which concerns on Example 1 of this invention. It is a flowchart which shows the whole operation | movement of the electric power metering system which concerns on Example 1 of this invention. It is a flowchart which shows the classification process performed with the electric power metering system which concerns on Example 1 of this invention. It is a figure for demonstrating operation | movement of the electric power metering system which concerns on Example 1 of this invention. It is a figure for demonstrating other operation | movement of the electric power metering system which concerns on Example 1 of this invention. It is a flowchart which shows the division number change process performed with the electric power metering system which concerns on Example 2 of this invention. It is a flowchart which shows the other division number change process performed with the electric power metering system which concerns on Example 2 of this invention. It is a figure for demonstrating the operation | movement of the division number change in the electric power metering system which concerns on Example 2 of this invention. It is a flowchart which shows the measurement unit change process performed with the electric power measurement system which concerns on Example 3 of this invention. It is a flowchart which shows the other unit measurement update process performed with the electric power measurement system which concerns on the Example of this invention. It is a block diagram which shows notionally the watt-hour meter which concerns on Example 4 of this invention. It is a figure which shows the example of the hardware constitutions of the watt-hour meter which concerns on Example 4 of this invention. It is a block diagram which shows the internal structure of the watt-hour meter which concerns on Example 4 of this invention. It is a figure which shows the display order of the 1st display pattern currently used with the handy terminal. It is a figure which shows the display order of the 2nd display pattern generally used. It is a flowchart which shows the process sequence of the control program (electric energy measurement control program) of the watt-hour meter which concerns on Example 4 of this invention. It is a flowchart which shows the detailed procedure of the destination setting process shown in FIG. It is a flowchart which shows the detailed procedure of the supply-and-demand calendar setting process shown in FIG. It is a flowchart which shows the detailed procedure of the display pattern setting process shown in FIG. It is a block diagram which shows the structure of the conventional electric power metering system. It is a figure for demonstrating operation | movement of the conventional electric power metering system. It is a figure which shows the structure of the actual quantity controller which does not have the conventional communication function, and the actual quantity controller which has a communication function. It is a block diagram which shows the structure of the conventional seasonal meter. It is a block diagram which shows the structure which combined the used electric energy display terminal with the conventional real quantity controller with a communication function. It is a timing chart which shows the display order of the meter reading value of the conventional display terminal, and the meter reading value input order of the handy terminal.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the following description, the same or equivalent parts as those of the power metering system described in the background art column are denoted by the same reference numerals as those used in the background art column, and the description will be simplified.

  FIG. 1 is a block diagram showing the configuration of the power metering system according to the first embodiment of the present invention. The power metering system includes a power supply unit 10, a voltage / current detection unit 20, a power calculation circuit 30, a CPU 80, an LCD display 50, a communication circuit 60, and a peripheral circuit 70.

  The power supply unit 10 converts AC power supplied from a power supply facility (not shown) into DC power having a voltage level of an electronic circuit used inside the power metering system and supplies the DC power to each electronic circuit.

  The voltage / current detection circuit 20 includes a current transformer 21 and a step-down circuit 22. The current transformer 21 reduces the current of the AC power supplied from the power supply facility to the current level of the electronic circuit and supplies it to the power calculation circuit 30. The step-down circuit 22 reduces the voltage of the AC power supplied from the power supply facility to the voltage level of the electronic circuit, and supplies it to the power calculation circuit 30.

  The power calculation circuit 30 calculates power by multiplying the current supplied from the current transformer 21 and the voltage supplied from the step-down circuit 22, and generates a number of pulse signals proportional to the calculated power. The pulse signal generated by the power calculation circuit 30 is sent to the CPU 80 as a measurement pulse. The relationship between the pulse signal generated by the power calculation circuit 30 and the amount of power is the same as the relationship described in the background art section.

  The CPU 80 includes a total daily power memory 81, a clock mechanism 82, a supply and demand calendar 83, a sorting unit 84, a time zone memory 85, a meter reading time zone memory 86, a load survey memory 87, and a meter reading total power amount memory 88. .

  The total daily power memory 81 cumulatively adds (integrates) the measurement pulses sent from the power calculation circuit 30 and stores the result as a numerical value in the minimum measurement unit (for example, 0.001 kWh measurement unit). Therefore, the minimum metering unit value “1” is accumulated in the total daily power memory 81 every time 3600 metering pulses corresponding to the minimum metering unit are sent from the power calculation circuit 30.

  Further, every time the content of the total daily energy memory 81 is increased by the display unit (measurement unit) value by the integration of the minimum measurement unit value “1”, the measurement unit value is sent to the sorting unit 84. Specifically, when a weighing unit of 1 Wh is used, “0” is obtained by converting the minimum weighing unit value “1” into kWh each time the minimum weighing unit value “1” is accumulated in the total daily energy memory 81. .001 "is sent to the sorting unit 84 as a unit of measurement value. When a weighing unit of 10 Wh is used, every time the minimum weighing unit value “1” is accumulated 10 times in the total daily power memory 81, a value corresponding to 10 times the minimum weighing unit value “1” is set to kWh. “0.01” converted to is sent to the sorting unit 84 as a unit of measurement value. In the first embodiment, a weighing unit of 10 Wh is used, that is, “0.01” is used as the weighing unit value. Accordingly, the amount of power displayed on the LCD display 50 is composed of 6 digits obtained by concatenating 4 digits of the integer part and 2 digits of the decimal part.

  Further, the contents of the total daily energy memory 81 are stored in the load survey memory 87 as a 30-minute value when the clock mechanism 82 measures ** 0: 00 and 30 minutes (** is 0 to 23, the same applies hereinafter). The The contents of the total daily energy memory 81 are also stored in the load survey memory 87 when the time is changed and when the measurement is confirmed.

  The clock mechanism 82 measures the current date and time. The date and time measured by the clock mechanism 82 is referred to by the sorting unit 84. The supply and demand calendar 83 stores information defining the measurement pattern (number of sections) described in the background art section. The contents of the supply and demand calendar 83 are referred to by the sorting unit 84.

The sorting unit 84 stores the time unit memory 85 based on the measurement unit value “0.01” sent from the total daily energy memory 81 based on the date and time from the clock mechanism 82 and the measurement pattern from the supply and demand calendar 83. distributed to either the first time period memory 85 ₁ to 6 hours band memory 85 ₆ constituting. For example, by referring to the clock mechanism 82 and supply calendar 83, when it is judged is 18 o'clock on weekdays summer, and so on distributed to the second time frame memory 85 _2.

Time zone memory 85 is composed of one day (24 hours) the first time period memory 85 ₁ to 6 hours band memory 85 ₆ corresponding to each of the segmented time zone six. Each of the first time zone memory 85 ₁ to the sixth time zone memory 85 ₆ accumulates (accumulates) and stores the measurement unit value “0.01” distributed by the sorting unit 84.

Meter reading time band memory 86, the first time period memory 85 ₁ to 6 hours zone first meter reading time band memory 86 ₁ to 6 meter reading time band memory 86 which correspond to the memory 85 ₆ time zones memory 85 _It consists of _six . The meter reading time zone memory 86 copies the contents of the time zone memory 85 and uses it for calculation of the electric power charge when the measurement is confirmed, the number of time zone sections to be described later and the unit of measurement are changed.

  The load survey memory 87 stores a 30-minute value. That is, when the clock mechanism 82 measures ** 00 and 30 minutes (** is 0 to 23), the contents of the total daily energy memory 81 are sent to the load survey memory 87 and stored therein. Further, even when the time is changed and the measurement is confirmed, the contents of the total daily energy memory 81 are sent to the load survey memory 87 and stored therein. Note that the interval for storing the contents of the total daily energy memory 81 in the load survey memory 87 is not limited to 30 minutes and can be arbitrarily determined.

  The meter reading total daily energy memory 88 copies the contents stored in the total daily energy memory 81 when the metering is confirmed.

Display unit 50, and displays the contents stored in the total daily amount of power the memory 81 as a total daily amount of power, to display the contents stored Full for meter reading to electric energy memory 88, the first time period memory 85 ₁ selectively displaying the contents stored in the sixth time period memory 85 ₆ and the first meter reading time band memory 86 ₁ to 6 meter reading time band memory 86 ₆ as a time charging force, further, the load survey memory 87 The 30 minute value stored in is selectively displayed. In addition to the above, the display unit 50 is also used to display the current date and time, time zone, and the like.

  The communication circuit 60 transmits various types of information obtained by the power metering system to the center via a communication line (not shown), and makes various settings and setting changes to the power metering system from the center via a communication line (not shown). Used to do.

  The peripheral circuit 70 includes a setting button for making various settings in the power metering system, a pulse output circuit (none of which is shown) for outputting the above-described metering pulse to the outside, and the like. The setting buttons include a time change button for changing the time, a measurement confirmation button (not shown) for instructing measurement determination, and the like.

  The change is made in advance by issuing a change instruction from the communication circuit 60, and when the weighing confirmation button is pressed or when the weighing confirmation instruction is issued from the communication circuit 60 or after a predetermined time. When the weighing is automatically confirmed (for example, at the end of a month), the time zone number change or the weighing unit change is performed. In other words, the time zone number change and the measurement unit change are performed under the AND condition of the “held change instruction” and the “subsequent measurement confirmation operation”. Strictly speaking, the change of the number of time zones and the change of the measurement unit are performed immediately after the measurement is confirmed. This is because if the value before change is not saved in the meter reading time zone memory and meter reading all-day power memory by metering confirmation, the power consumption from the last metering decision to the time of change cannot be obtained. is there.

  Note that “measurement confirmation” is “an act of saving the current contents of the time zone memory in the meter reading time zone memory”. The “meter reading” is “an act of reading the content stored in the meter reading time zone memory by the measurement confirmation”. “Power consumption” is “the difference between the current meter reading value and the previous meter reading value”.

  Next, the operation of the power metering system according to the first embodiment of the present invention configured as described above will be described with reference to the flowcharts shown in FIGS.

  As shown in the flowchart representing the main routine in FIG. 2, the CPU 80 first checks whether or not a measurement pulse has been received from the power calculation circuit 30 (step S10). When it is determined that the measurement pulse has been received, a pulse counter provided in a memory (not shown) is incremented (+1) (step S11). Otherwise, the sequence branches to step S16.

  When the pulse counter is incremented in step S11, it is next checked whether or not the content of the pulse counter is equal to “3600” corresponding to the minimum measurement unit (step S12). If it is determined that the value is equal to “3600”, the contents of the pulse counter are cleared (step S13), otherwise the sequence branches to step S16. As a result, the pulse counter functions as a counter that counts while cycling around “3600”. When the contents of the pulse counter are cleared in step S13, the contents of the all-day power counter (all-day power memory 81) are then incremented (+1) (step S14).

  Next, a sorting process is executed by the sorting unit 84 (step S15). The details of this sorting process will be described with reference to the flowchart shown in FIG.

In the separation process, first, the contents of the supply and demand calendar 83 are read (step S30). Next, “1” is set as an initial value in the variable i (step S31). Next, based on the date and time read from the clock mechanism 82 and the contents of the supply and demand calendar 83 read in step S30, it is checked whether the current time is the i-th time zone (step S32). . Here, if it is determined that it is the i-th time zone, the measurement unit value “0.01” is added to the contents of the _i- th time zone memory 85 _i (step S33). If it is determined in step S32 that it is not the i-th time zone, the process of step S33 is skipped.

Next, the variable i is incremented (+1) (step S34). Then, it is checked whether or not the variable i is “7” (step S35). If it is determined that the variable i is not “7”, the sequence returns to step S32, and the above-described operation is repeatedly executed. Then, in the course of repeated execution, in step S35, the variable i is judged that becomes "7", the weighing unit value to either the first time period memory 85 ₁ to 6 hours band memory 85 ₆ It is determined that "0.01" has been accumulated, and the process returns from the separation process routine to the main routine.

  In the main routine, as shown in FIG. 2, it is next checked whether or not the clock mechanism 82 indicates ** 0: 00 or 30 minutes (step S16). If it is determined in step S16 that ** 00 or 30 minutes are indicated, the sequence branches to step S20, and the contents of the total daily energy memory 81 together with the date and time at that time are loaded into the survey survey memory. 87. Thereafter, the sequence proceeds to step S21.

  If it is determined in step S16 that ** 0: 00 or 30 minutes are not indicated, it is next checked whether or not the time has been changed (step S17). This is performed by examining whether or not a time change button included in the peripheral circuit 70 is operated or whether or not a time change instruction is issued from the communication circuit 60. The function of checking whether the time has been changed corresponds to the time changing means of the present invention. If it is determined in step S17 that the time has been changed, the process branches to step S20, and the contents of the total daily energy memory 81 and the date and time at that time are stored in the load survey memory 87. Thereafter, the sequence proceeds to step S21.

  If it is determined in step S17 that the time has not been changed, it is next checked whether or not the measurement has been confirmed by monthly tightening or counting (step S18). Whether or not the weighing is confirmed is determined by whether or not the weighing confirmation button included in the peripheral circuit 70 is operated, whether or not the weighing confirmation instruction is issued from the communication circuit 60, or the date and time measured by the clock mechanism 82 in advance. This is done by checking whether the date and time set as the meter reading date have come. The function of checking whether or not the measurement is confirmed corresponds to the measurement confirmation means of the present invention.

  If it is determined in step S18 that the metering has been confirmed, the contents of the time zone memory 85 and the total daily power amount memory 81 are copied to the meter reading time zone memory 86 and the total daily power amount memory 88 for meter reading (step S19). ). The power charge is calculated with reference to the contents of the meter reading time zone memory 86. Thereafter, the sequence proceeds to step S <b> 20, and the contents of the total daily energy memory 81 at that time and the time at that time are stored in the load survey memory 87. Thereafter, the sequence proceeds to step S21. If it is determined in step S18 that the weighing is not confirmed, the sequence branches to step S21.

In step S21, display processing is performed. In the display process, the total daily contents stored in the electric energy memory 81 (total daily amount of power), band first time period memory 85 ₁ to 6 hours period memory 85 times for ₆ and the first meter reading memory 86 ₁ to 6 meter reading time charging amount of force to use time slot memory 86 ₆ stored, loaded survey memory 87 30 min values stored in the display LCD the contents of the metering confirm stored in Full for metering the amount of power the memory 88 50 The process of selectively displaying on the screen is performed.

  Next, other processing is performed (step S22). In “other processing”, processing for transmitting / receiving information to / from the center via the communication circuit 60, processing for outputting measurement pulses to the outside via the pulse output circuit of the peripheral circuit 70, and the like are performed. Thereafter, the sequence returns to step S10, and the above-described processing is repeated thereafter.

  In order to further deepen the understanding of the operation of the power metering system according to the first embodiment of the present invention, functions realized by processing according to the flowcharts shown in FIGS. 2 and 3 will be described with reference to FIGS. 4 and 5. To do.

  In the supply and demand calendar 83, as shown in FIG. 4, the first time zone is from 0:00:00 to 1:00:00, and the second time zone is from 1:00:00 to 2:00:00. It is assumed that it is specified that the third time zone is from 2:00:00 to 3:00:00, until the second.

In this example, the minimum metering unit value “0.001” is integrated into the contents of the total daily energy memory 81 from 0:00:00 to 1:00:00, which is the first time zone. Thus, every time the second digit is increased from the bottom, in other words, every time the measurement unit value “0.01” is accumulated, the measurement unit value “0.01” is added to the contents of the first time zone memory 85 _1. Accumulated. Further, when the clock mechanism 82 becomes 00:00:00 and 0:30:30, the measured value stored in the total daily energy memory 81 at that time is stored in the load survey memory 87, respectively.

Similarly, during the period from 1:00:00 to 2:00:00, which is the second time zone, every time the measurement unit value “0.01” is integrated into the contents of the all-day power amount memory 81, 2 hours band memory 85 ₂ of the weighing unit value to the content "0.01" is integrated. Further, when the clock mechanism 82 becomes 1:00:00, 1:30:00, the measured values stored in the total daily energy memory 81 at that time are stored in the load survey memory 87, respectively. The same applies to the third time zone.

  FIG. 5 shows the operation when the time is changed and when the weighing is confirmed. That is, when the time is changed at 0:10:15, the measured value stored in the all-day power amount memory 81 at that time is stored in the load survey memory 87. When the measurement is confirmed at 2:49:54, the measured value stored in the total daily power memory 81 is stored in the load survey memory 87.

  The load survey memory 87 only needs to be able to store information for a certain period (for example, 1 to 2 months), and the information is overwritten after the information for a certain period is stored.

As described above, according to the power metering system according to the first embodiment of the present invention, the total daily power memory 81 is provided, and the total power value determined by the power metering system increases in the total power memory 81. every, it is arranged that distributes the measuring unit value to either the first time period memory 85 ₁ to 6 hours band memory 85 _6, the first time period memory 85 ₁ to 6 hours band memory 85 ₆ By referring to the contents, it is possible to know the amount of power consumption for each time zone, and by referring to the contents of the total daily power amount memory 81 that is continuously measured, for example, the power consumption amount for one month can be easily obtained. I can know. In addition, since it is digitized every 3600 pulses in the total daily energy memory 81, for example, the power amount obtained as a numerical value from the total daily energy memory 81 is held in each time zone. There are no pulses. Therefore, since the sum of the increments in each time zone is equal to the increment of the total daily power, the verification can be performed.

  In addition, since the contents of the total daily energy memory 81 at that time are continuously stored in the load survey memory 87 as 30-minute values every 30 minutes, the contents of the load survey memory 87 can be referred to by referring to the contents of the load survey memory 87. Electricity trading with minute values becomes possible.

  In addition, according to the power metering system, it is possible to obtain all-day power, hourly power, and power consumption every 30 minutes. Even if the measurement contract is changed to supply, the measurement contract need not be replaced, so the measurement contract can be changed quickly.

  In addition, when a power metering system that combines a power meter with a power meter is used, there is no need to install a power meter terminal even if the subscription rate of the contract is high, thus reducing metering costs. be able to.

  The power metering system according to Embodiment 2 of the present invention is characterized in that accurate metering can be continued even when the number of time zone sections is changed.

  The configuration of the power metering system according to the second embodiment is substantially the same as the configuration of the power metering system according to the first embodiment shown in FIG. 1, and an instruction to change the number of segments (not shown) for changing the number of time zone segments is given. The point is different. The section number change instruction corresponds to the section number changing means of the present invention. An instruction for changing the number of sections is issued in advance from the communication circuit 60, and after the instruction for changing the number of sections, when the weighing confirmation button is pressed or when the weighing is automatically confirmed at a predetermined time (for example, monthly closing). The number of time zones is changed. That is, the time zone number change is performed under the AND condition of the “holded category number change instruction” and the “subsequent weighing determination operation”.

Next, an operation of changing the number of sections executed in the power metering system according to the second embodiment of the present invention will be described with reference to a flowchart showing the section number changing process of FIG. In Example 2, from the state time zone number indicator "4" is a and the first time period memory 85 ₁ through the fourth time period memory 85 ₄ is used, the time zone division number "6" met An example will be described in which the first time zone memory 85 ₁ to the sixth time zone memory 85 ₆ are changed to a usable state.

  The division number changing process is executed as a part of the “other processes” executed in step S22 of FIG. That is, in the category number changing process, first, it is checked whether or not there is an instruction to change the category number (step S40).

If it is determined in step S40 that there is an instruction to change the number of divisions, that is, the number of time zone divisions has been changed from “4” to “6”, the increased fifth time zone memory 85 ₅ and sixth time zone memory The contents of 85 ₆ are cleared to zero (step S41). Thereafter, the contents of the time zone memory 85 (including current power amount information and attribute information related to display and non-display) are copied to the meter reading time zone memory 86 (step S42). Thereafter, the sequence returns to the main routine (see FIG. 2). Even when it is determined in step S40 that there is no change in the number of sections, the sequence returns to the main routine.

  In order to further deepen the understanding of the operation of the power metering system according to the second embodiment of the present invention, functions realized by the processing according to the flowchart shown in FIG. 6 will be described with reference to FIG.

When the power metering system is attached, the contents of the first time zone memory 85 ₁ to the fourth time zone memory 85 ₄ are displayed on the current screen formed on the LCD display 50. Since the time zone number segment is "4", the contents of the 5 hour period the memory 85, _fifth and sixth time period memory 85 ₆ is not displayed. Thereafter, every time the weighing unit value "0.01" is sent from the total daily amount of power the memory 81, to either the first time period memory 85 ₁ through the fourth time period memory 85 _4, the measuring unit value "0 .01 "is accumulated.

On the other hand, the needle screen formed on the LCD display 50, when fitted with a power metering system is left in the first meter reading time band memory 86 ₁ to 4 meter reading time band memory 86 ₄ Contents Is displayed, but these values are meaningless. In this case also, the time zone the number of division is "4", the contents of the fifth meter reading time zone memory 86 _fifth and sixth meter reading time zone memory 86 ₆ is not displayed.

In the above state, when the number of divisions is changed under the AND condition of the division number change instruction and the subsequent weighing confirmation operation, the current screen displays the first time zone memory 85 ₁ to the sixth time zone memory 856 ₆ . The contents are displayed. Immediately after the number of divisions is changed, zero is displayed as the contents of the fifth time zone memory 85 ₅ and the sixth time zone memory 85 ₆ .

On the other hand, the needle screen, when the division number change has been performed, the first time period memory 85 ₁ through the fourth time period memory 85 ₄ in the first meter reading time band memory 86 ₁ to 4 meter reading time content which was copied to the band memory 86 ₄ is displayed. Although the contents after the A fifth meter reading time band memory 86, _fifth and sixth meter reading time band memory 86 be ₆ division number change has been performed is not displayed, those contents are cleared to zero . The content displayed on the meter reading screen does not change until the next measurement is confirmed.

In the above state, the measurement confirmation button included in the peripheral circuit 70 is operated, or the date and time measured by the clock mechanism 82 becomes the date and time set in advance as the meter reading date, or the measurement is confirmed by a communication operation. When such is done, the current screen, the contents of the first time period memory 85 ₁ to 6 hours band memory 85 ₆ is displayed.

On the other hand, the needle screen, when the metering confirmation is made, the first time period memory 85 ₁ to 6 hours zone contents of the memory 85 ₆ first to meter reading time band memory 86 ₁ 6 meter reading time band memory The one copied in 86 ₆ is displayed. This the first time at the time, the contents of the fifth meter reading time zone memory 86 _fifth and sixth meter reading time zone memory 86 ₆ is displayed.

As described above, according to the power metering system according to the second embodiment of the present invention, when the number of time zone segments of consumers who have concluded a metering contract by season / time zone has increased, it has increased. Since the integration is started after the time zone memory corresponding to the time zone section is cleared to zero, the power consumption can be accurately measured even if the initial value is not displayed on the meter reading screen. Further, it is possible is provided with the total daily amount of power the memory 81, and compares the contents of such sum and increment the total daily amount of power the memory 81 of all the incremental time periods memory 85 _{1-85 6.} Therefore, when doubt arises between a customer and an electric power supplier, it can confirm that these correspond and can verify the correctness of a measurement value.

  Further, in the case of the power metering system in which the initial value is displayed, the time zone memory of the increased time zone section is cleared to zero, so that zero is displayed on the meter reading screen. Therefore, no doubt arises between the customer and the power supplier.

  In addition, the division number changing process in the power metering system according to the second embodiment can be modified as shown in the flowchart of FIG. In the category number changing process according to this modification, first, it is checked whether or not there is an instruction to change the category number (step S50). This is performed by comparing the number of divisions included in each supply and demand calendar before and after the change in the number of divisions.

When it is determined in step S50 that there is an instruction to change the number of sections, that is, it is determined that the number of time section sections has been changed from “4” to “6”, the contents of the time slot memory 85 are copied to the meter reading time slot memory 86. (Step S51). Thereafter, the contents of the increased fifth time zone memory 85 ₅ and sixth time zone memory 85 ₆ are cleared to zero (step S52). Thereafter, the sequence returns to the main routine (see FIG. 1). Even when it is determined in step S50 that there is no change in the number of sections, the sequence returns to the main routine.

According to the above classification number change processing, the contents of the 5 meter reading time band memory 86, _fifth and sixth meter reading time band memory 86 ₆ is not cleared to zero, so does not appear in the meter reading screen, no problem. Further, in the fifth meter reading time band memory 86, _fifth and sixth meter reading time band memory 86 _6, when the metering confirmation is made, the contents of the 5 hour period the memory 85, _fifth and sixth time period memory 85 ₆ copy Therefore, the correct measurement value is displayed on the meter reading screen.

  The power metering system according to Embodiment 3 of the present invention is characterized in that accurate metering can be continued even when the metering unit is changed.

  The configuration of the power metering system according to the third embodiment is substantially the same as the configuration of the power metering system according to the first embodiment shown in FIG. 1, and the point that a measurement unit change instruction (not shown) for changing the measurement unit is performed. Is different. The weighing unit change instruction corresponds to the weighing unit changing means of the present invention. When a measurement unit change instruction is issued in advance from the communication circuit 60 and the measurement confirmation button is pressed after the measurement unit change instruction, or when the measurement is automatically confirmed at a predetermined time (for example, monthly closing). The unit of measure is changed. That is, the measurement unit change is performed under the AND condition of the “held measurement unit change instruction” and the “subsequent measurement determination operation”.

  Next, the operation of changing the measurement unit executed in the power measurement system according to the third embodiment of the present invention will be described with reference to the flowchart showing the measurement unit change process of FIG. In Example 3, from the state in which the weighing unit of 10 Wh is used (the state in which “0.01” is used as the weighing unit value), the state in which the weighing unit of 1 Wh is used (“0.001” is changed). The state used as the unit of measurement value), in other words, the case where the electric energy is changed from the state displayed with 6 digits to the state displayed with 7 digits will be described as an example.

  This measurement unit changing process is executed as a part of the “other processes” executed in step S22 of FIG. That is, in the weighing unit change process, first, it is checked whether or not there is an instruction to change the weighing unit (step S60).

  If it is determined in step S60 that there is an instruction to change the weighing unit, that is, it is determined that the display of the electric energy has been changed from 6-digit display to 7-digit display, the 6-digit measurement value (value up to the second decimal place) In step S61, the weighing is confirmed. That is, the contents of the time zone memory 85 are copied to the meter reading time zone memory 86.

Then, column 7 of the first time period for the memory 85 ₁ to 6 hours band memory 85 ₆ and the first meter reading time zone memory 86 ₁ to 6 meter reading time zone memory 86 ₆ (the third decimal point) Is cleared to zero (step S62). Thereafter, the electric energy is displayed in 7 digits (step S63). Thereafter, the sequence returns to the main routine (see FIG. 2). Even when it is determined in step S60 that there is no change in the weighing unit, the sequence returns to the main routine.

By the above processing, when the electric energy is changed from the state displayed with 6 digits to the state displayed with 7 digits, the seventh digit of the first time zone memory 85 ₁ to the sixth time zone memory 856 ₆ is displayed. Since the integration is started with the measurement unit value “0.001” after (the third decimal place) is cleared to zero, the power consumption after the change can be accurately measured.

In addition, at the time of change of the weighing unit, 7 digit of the first meter reading time zone memory 86 ₁ to 6 meter reading time zone memory 86 ₆ (the third decimal point), so also is cleared to zero, accurate to the meter reading screen Information can be displayed.

  In addition, the measurement unit change process in the electric power measurement system according to the third embodiment can be modified as illustrated in the flowchart of FIG. In the measurement unit change process related to the deformation, first, it is checked whether or not there is an instruction to change the measurement unit (step S70). This is performed by comparing the contents of each measurement unit designation before and after the change of the measurement unit. Regarding the change of the measurement unit, there are two storage locations (storage areas) (not shown) for storing the content before the change of the measurement unit and the content after the change of the measurement unit.

If it is determined in step S60 that there is an instruction to change the weighing unit, that is, the display of the electric energy is changed from the 6-digit display to the 7-digit display, the first time zone memory 85 ₁ to the sixth time zone memory 85. values of ₆ and 7 digit of the first meter reading time band memory 86 ₁ to 6 meter reading time band memory 86 ₆ (the third decimal point) is cleared to zero (step S71).

  Next, weighing is confirmed with a six-digit weighing value (a value up to the second decimal place) (step S72). That is, the contents of the time zone memory 85 are copied to the meter reading time zone memory 86. Thereafter, the electric energy is displayed in 7 digits (step S63). Thereafter, the sequence returns to the main routine (see FIG. 2). Even when it is determined in step S60 that there is no change in the weighing unit, the sequence returns to the main routine.

By the above processing, when the power amount is changed from the state displayed with 6 digits to the state displayed with 7 digits, the contents of the time zone memory 85 are copied to the time zone memory 86 for meter reading, 7 digit of 1 hour period for the memory 85 ₁ to 6 hours band memory 85 ₆ (the third decimal point) is cleared to zero, because the integrated by then to the weighing unit value "0.001" is started, The same effects as those of the third embodiment described above are achieved.

  First, the concept of the invention applied to the fourth embodiment will be described, and then the specific contents of the fourth embodiment will be described.

  FIG. 11 is a block diagram conceptually showing the watt-hour meter according to Embodiment 4 of the present invention. This watt-hour meter includes a control unit 100, a display unit 120, and a communication unit 130. The control unit 100 includes an all-day power storage unit 1a, a metering function storage unit 1b, a metering pattern storage unit 1c, an hourly power storage unit 1d, a power calculation unit 1e, a metering function control unit 1f, a selector 1g, and an output. It has a selector 1h, hourly power consumption calculation means 1i and setting means 1j.

  The all-day electric energy storage means 1a stores the all-day electric energy in which the used electric energy is accumulated based on the output of the electric energy calculating means 1e. The total daily power stored in the total daily power storage means 1 a is sent to the display unit 120.

  The weighing function storage unit 1b stores a setting as to whether or not it is necessary to calculate a power amount for each time zone based on the output of the setting unit 1j. The necessity / unnecessity of calculation of the electric energy for each time zone set in the setting means 1j (hereinafter referred to as “presence / absence of measurement by time zone”) is sent to the weighing function control means 1f.

  The measurement pattern storage unit 1c stores a measurement pattern corresponding to a time zone for calculating a charge defined according to a charge contract between a power consumer and a power supplier. The hourly power amount storage unit 1d stores the hourly power amount calculated by the hourly power amount calculation unit 1i.

  The electric energy calculation means 1e measures the electric energy and calculates the accumulated total daily electric energy. The total daily power amount calculated by the power amount calculating means 1e is sent to the total daily power amount storage means 1a.

  The weighing function control means 1f reads out the presence / absence of weighing by time zone stored in the weighing function storage means 1b, and when it is determined that it is necessary, turns on the selector 1g and the output selector 1h, The power calculation means 1i is turned on. Thus, the total daily power amount stored in the total daily power storage unit 1a is input to the hourly power amount calculation unit 1i, and measurement by the hourly power amount calculation unit 1i becomes possible. Further, the calculated hourly power storage unit 1d and the display control unit 2b are connected, and the display unit 2b can display the hourly power amount value stored in the hourly power storage unit 1d. It becomes like this.

  Based on the measurement pattern stored in the measurement pattern storage unit 1c, the hourly power consumption calculation unit 1i distributes the measurement value obtained from the electric energy stored in the all-day power storage unit 1a according to the time zone, The amount of power for each band is calculated and stored in the storage area (time zone section) of the corresponding hourly power amount storage means 1d.

  When setting information such as a destination and a measurement pattern is input from the outside via the communication unit 130, the setting unit 1j sets corresponding information therein. That is, when a destination is input, a unit of measurement defined according to the destination is set and notified to the electric energy calculation means 1e. Further, when the measurement pattern is input, the measurement for each time zone is performed according to the number of time zone segments required according to the measurement pattern and the number of time zone segments previously prepared in the power storage unit 1d for each time zone. Set presence or absence. When the number of time zone segments prepared in the power storage unit 1d for each time zone is zero or the number of time zone segments prepared is less than the number of time zone segments required according to the measurement pattern, Set “No Weighing”. In addition, when the number of time zone segments prepared is equal to or greater than the number of time zone segments required according to the measurement pattern and measurement by time zone is required, “with measurement by time zone” is set.

  The display unit 120 includes a display pattern storage unit 2a and a display control unit 2b. The display pattern storage means 2a stores a display pattern that defines the order in which display data such as the total daily power amount and the hourly power amount is displayed. The display order of the display data includes, for example, a display order similar to the conventional display order and a display order adapted to the input procedure of the handy terminal.

  The display control means 2b sequentially displays display data including the total daily energy data in accordance with the display pattern stored in the display pattern storage means 2a. When the metering function control unit 1f of the control unit 100 is disconnected from the hourly power storage unit 1d, the total daily power stored in the total power storage unit 1a is read and displayed. When the hourly power amount storage unit 1d is connected by the metering function control unit 1f, the hourly power amount stored in the hourly power amount storage unit 1d is displayed together with the total daily power amount.

  The communication unit 130 inputs various setting data such as a destination, a measurement pattern, and a display pattern input from the outside, and transmits them to the control unit 100 or the display unit 120. Further, in response to a request from the outside, data held by the control unit 100 or the display unit 120 is read and transmitted to the outside.

  Next, the operation of the watt hour meter configured as described above will be described. In the case of the actual amount contract, zero is set for the prepared time zone classification, and “no measurement by time zone” is set in the weighing function storage unit 1b by the setting unit 1j. Note that “no measurement by time zone” may be set in the measurement function storage unit 1b in advance. The metering function control unit 1f is set to “no metering by time zone”, and therefore turns off the selector 1g, the output selector 1h, and the hourly power calculation unit 1i. As a result, only the calculation of the total daily power amount by the power amount calculation means 1e is executed, and the display control means 2b displays the total daily power amount stored in the total daily power storage means 1a, but the hourly power amount is displayed. do not do. The display data including other information is displayed in order according to the display pattern stored in the display pattern storage unit 2a.

  In the case of seasonal contracts, the prepared time zone classification is set to a value other than zero, and a measurement pattern according to the contract is set. That is, when the number of time zone segments prepared in advance is equal to or greater than the number of time zone segments required according to the measurement pattern, the setting unit 1j sets the setting “with measurement by time zone” in the measurement function storage unit 1b. . Since the weighing function control unit 1f is set to require calculation of the electric energy for each time zone, the selector 1g, the output selector 1h, and the hourly power calculation unit 1i are turned on. Thereby, using the measured value of the power amount calculation unit 1e, the calculation of the power amount by time zone by the power amount calculation unit by time zone 1i is executed according to the measurement pattern, and the calculated power amount by time zone is changed to the time zone. It is stored in the separate electric energy storage means 1d. Further, the total power consumption is stored in the total power storage means 1a by the power calculation means 1e. The display control means 2b displays the total daily power amount stored in the total daily energy storage means 1a and the hourly power energy stored in the hourly power amount storage means 1d. The display data including other information is displayed in order according to the display pattern stored in the display pattern storage unit 2a. If the number of time zone segments prepared in advance is less than the required number of time zone segments, an error display is performed or a device that can calculate the amount of power by time zone (for example, a power consumption display terminal) is connected. Request.

  In the case of the PPS contract, the prepared time zone classification is set to zero or non-zero depending on whether or not the measurement by time zone is performed. In addition, when performing measurement by time zone, a measurement pattern to be used is also set. Also, PPS is set as the destination. The setting unit 1j sets a unit of measurement according to the destination and notifies the power amount calculation unit 1e. Further, the weighing function storage means 1b is set according to whether or not the prepared time zone classification and time zone weighing are performed. When time-based metering is not performed, the same setting as in the case of the actual amount contract described above is made, and only the calculation of the total daily power amount by the power amount calculating means 1e is executed. The display control unit 2b displays the total daily power amount stored in the total daily power storage unit 1a, but does not display the hourly power amount. The calculation of the total daily power amount is performed in units of measurement according to the PPS. On the other hand, when performing the measurement by time zone, the same setting as in the case of the contract by season is made, and by using the measurement value of the power amount calculation means 1e, by the time zone by the hourly power amount calculation means 1i. The calculation of the electric energy is executed according to the measurement pattern, and the calculated electric energy by time zone is stored in the electric energy storage means by time zone 1d. In the total daily power storage unit 1a, the total daily power amount is stored by the power amount calculation unit 1e. The calculation of the total daily power amount is performed in units of measurement according to the PPS. The display control means 2b displays the total daily power amount stored in the total daily energy storage means 1a and the hourly power energy stored in the hourly power amount storage means 1d.

  In the configuration described above, the control unit 100, the display unit 120, and the communication unit 130 are stored in the same device, but a watt hour meter including a part of the control unit 100 and the communication unit 130, and the control unit 100 It is possible to configure so that the other part and the used power amount display terminal including the display unit 120 and the communication unit 130 are stored in another device. In such a configuration, for example, in the case of “metering by time zone”, the watt hour meter performs the same processing as in the case of “no metering by time zone” and uses the total daily power amount via the communication unit. Transmit to the power display terminal. The used power amount display terminal stores the same metering pattern as the watt hour meter, and calculates the hourly power amount from the total daily power amount input via the communication unit according to this metering pattern.

  According to the watt-hour meter configured as described above, it is possible to respond to actual quantity contracts, seasonal contracts, and PPS contracts according to the settings, and the meter can be used even when contracts are changed. No need to replace. Even when the setting is changed, information such as a unit of measurement prepared in advance is automatically selected according to an instruction from the outside, so that the work of changing the contract can be facilitated. In this way, it is possible to reduce the weighing cost by reducing the number of exchanges of instruments due to contract changes and facilitating the change work.

  Moreover, the display data displayed on the display unit including the total daily power amount and the hourly power amount are sequentially displayed according to the display pattern. When viewing the display data, it is possible to select a display pattern that is easy for the person to understand and check the data. This is particularly effective when performing on-site meter reading.

  Next, specific contents of the fourth embodiment of the present invention will be described in detail. FIG. 12 is a diagram illustrating an example of a hardware configuration of the watt-hour meter 1 according to the fourth embodiment of the present invention. The entire watt-hour meter 1 is controlled by a CPU (Central Processing Unit) 11. A RAM 12, a ROM 13, a display control unit 14, a weighing unit 15, and a communication interface 16 are connected to the CPU 11. Note that the RAM 12 and the ROM 13 may be built in the CPU 11.

  The RAM 12 temporarily stores at least part of an OS (Operating System) program and application programs to be executed by the CPU 11. The RAM 12 stores various data necessary for processing by the CPU 11. The ROM 13 stores the OS and application programs. A display unit 18 is connected to the display control unit 14, and a measurement value or the like is displayed on the screen of the display unit 18 in accordance with a command from the CPU 11. The measuring unit 15 transmits the measured power consumption to the CPU 11. The communication interface 16 is connected to the network 19 and transmits and receives data via the network 19.

  With such a hardware configuration, the processing function of the watt-hour meter according to the fourth embodiment can be realized. 12 shows the hardware configuration of the watt-hour meter. However, the hardware configuration of the power consumption display terminal is the same as the hardware configuration of the watt-hour meter shown in FIG. It is.

  FIG. 13 is a block diagram showing an internal configuration of a watt-hour meter according to Embodiment 4 of the present invention. The watt-hour meter 1 includes a control unit 100, a display unit 120, and a communication circuit (communication unit) 130.

  The control unit 100 includes an electric energy calculation unit 101, an all-day electric energy memory 102, a calculation function control unit 103, a supply and demand calendar storage unit 104, a time zone division number storage unit 105, a selector 106, a separator 107, and an electric energy by time zone. The memory 108 and the output selector 109 are configured.

  The electric energy calculation unit 101 calculates the amount of electric power used based on the instruction value measured by the measuring unit 15 (see FIG. 12). The used power amount calculated by the power amount calculation unit 101 is sent to the all-day power amount memory 102.

  The total daily power memory 102 accumulates and stores the used power amount sent from the power amount calculation unit 101. The used electric energy stored in the total daily electric energy memory 102 is sent to the selector 106 and the display unit 120.

  The calculation function control unit 103 controls switching of the time-based weighing function. That is, the calculation function control unit 103 determines the number of time zone segments stored in the time zone segment number storage unit 105 and a command sent from the outside via the communication circuit (communication unit) 130 (hereinafter, “external command”). Control whether to measure by time zone. Specifically, when the number of time zone segments stored in the time zone segment number storage unit 105 is zero, the selector 106 and the output selector 109 are turned off regardless of the external command. In this case, the metering according to the season is performed at the power consumption display terminal attached to the outside.

  On the other hand, when the number of time zone segments stored in the time zone segment number storage unit 105 is other than zero, the calculation function control unit 103 turns on / off each of the selector 106 and the output selector 109 according to an external command. Control. That is, when “with weighing by time zone” is set by an external command, the selector 106 and the output selector 109 are turned on. Thereby, the measurement according to the season according to the supply-and-demand calendar memorize | stored in the supply-and-demand calendar memory | storage part 104 is performed. On the other hand, when “no measurement by time zone” is set by the external command, the selector 106 and the output selector 109 are turned off. Thereby, the measurement according to a season is performed with the used electric energy display terminal attached outside.

  The supply and demand calendar storage unit 104 corresponds to the measurement pattern storage unit 1c, and stores a supply and demand calendar that is set based on a measurement pattern according to a contract between the power consumer and the power supplier. The supply and demand calendar stored in the supply and demand calendar storage unit 104 is sent to the separator 107.

  The time zone division number storage unit 105 stores the number of time zone divisions, which is the number of time zones in which the amount of power can be measured for each time zone, in the time zone power amount memory 108. The number of time zone divisions is determined before the watt-hour meter design / manufacturing stage and before obtaining the certification, and the time zone division number cannot be changed by external communication or the like.

  The selector 106 is turned on / off in accordance with control from the calculation function control unit 103, and connects or disconnects the total daily power memory 102 and the separator 107.

  In the state where the selector 106 is turned on by the control from the calculation function control unit 103, the sorter 107 uses the power usage amount sent from the total daily power amount memory 102 in accordance with the supply / demand calendar stored in the supply / demand calendar storage unit 104. Are allocated to the time zone memories 111 to 116 provided for each time zone.

  The hourly power amount memory 108 is a plurality of memories that store the amount of power for each time zone, that is, a first time zone memory 111, a second time zone memory 112, a third time zone memory 113, and a fourth time zone memory. 114, a fifth time zone memory 115 and a sixth time zone memory 116. Note that the number of time zone divisions is appropriately set according to the device. The contents of the time zone memories 111 to 116 are sent to the display unit 120 via the output selector 109.

  The output selector 109 is turned on / off according to the control from the calculation function control unit 103, and connects or disconnects the hourly power amount memory 108 and the display unit 120. The calculation function control unit 103 stores two display patterns (details will be described later) shown in FIGS. 14 and 15 as display patterns on the display unit 120 when the output selector 109 is turned on / off. This display pattern is switched by an external command sent from the outside via the communication circuit (communication unit) 130.

  The communication circuit (communication unit) 130 sends external commands and supply / demand calendars sent from the outside to the calculation function control unit 103 and supply / demand calendar storage unit 104, respectively, and responds to requests from outside, The number of time zone sections stored in the storage unit 105 is transmitted to the outside.

  The display unit 120 includes an all-day power indicator 121, a first time zone energy indicator 122, a second time zone energy indicator 123, a third time zone energy indicator 124, a fourth time zone energy indicator 125, and a fifth. It has a time zone power amount indicator 126 and a sixth time zone power amount indicator 127.

  The all-day power amount indicator 121 always displays the accumulated value of the used power amount sent from the all-day power amount memory 102 of the control unit 100 as the amount of power.

  1st time zone electric energy indicator 122, 2nd time zone electric energy indicator 123, 3rd time zone electric energy indicator 124, 4th time zone electric energy indicator 125, 5th time zone electric energy indicator 126, and 6th time zone electric energy When the calculation function control unit 103 determines that “weighing by time zone is present” and the output selector 109 is turned on, the display device 127 has the first time zone memory 111 and the second time zone memory. 112, the third time zone memory 113, the fourth time zone memory 114, the fifth time zone memory 115, and the cumulative value of the electric energy for each time zone stored in the sixth time zone memory 116 are displayed.

  Next, operation | movement of the watt-hour meter 1 which concerns on Example 4 of this invention comprised as mentioned above is demonstrated for every kind of contract.

  In the case of an actual contract, “No measurement by time zone” is set. In other words, the calculation function control unit 103 turns off the selector 106, the classifier 107, and the output selector 109, and does not perform measurement by time period, but only the calculation of the total daily power amount by the power amount calculation unit 101 is executed. In the display unit 120, only the total daily power stored in the total daily power memory 102 is displayed on the total daily power display 121.

  In the case of seasonal contracts, “With metering by time zone” is set, or “No metering by time zone” is set and the power consumption display terminal for measuring by time zone is connected. The When the used power amount display terminal is connected, the selector 106, the separator 107, the hourly power amount memory 108, and the output selector 109 are provided in the used power amount display terminal. Since it is the same as that of the watt-hour meter 1, the description is omitted.

  When “weighing by time zone” is set, the calculation function control unit 103 turns on the selector 106, the separator 107 and the output selector 109. As a result, the total daily power stored in the total daily power memory 102 is sent to the separator 107. The classifier 107 distributes this according to the time zone and calculates the amount of power for each time zone, and the corresponding first time zone memory 111, second time zone memory 112, third time zone memory 113, and fourth time zone. The data is stored in the band memory 114, the fifth time band memory 115, or the sixth time band memory 116, respectively. The display unit 120 displays the total daily power amount on the total daily power amount indicator 121, and also includes a first time zone memory 111, a second time zone memory 112, a third time zone memory 113, a fourth time zone memory 114, a fifth time zone memory 114, and a fifth time zone memory 114. The amount of power for each time zone stored in the time zone memory 115 and the sixth time zone memory 116 is represented by a first time zone power amount indicator 122, a second time zone power amount indicator 123, a third time zone power amount indicator 124, The fourth time zone power amount indicator 125, the fifth time zone power amount indicator 126, and the sixth time zone power amount indicator 127 are displayed.

  In the case of a PPS contract, PPS is set as the destination when the watt-hour meter 1 is installed. Thereby, the measurement unit of the electric energy calculation unit 101 is set to a value corresponding to the PPS, and an operation for calculating the electric energy in the measurement unit corresponding to the PPS is performed. The calculation of the total daily power amount and the hourly power amount is performed in the same manner as described above according to the presence / absence of the hourly metering. That is, in the case of “no measurement by time zone”, the same processing as the actual amount contract is performed. In the case of “weighing by time zone”, the same processing as in the case of the contract by season is performed.

  Next, display control performed by the display unit 120 will be described. In the display unit 120, the display control means 2b sequentially displays the display data according to the display pattern stored in the display pattern storage means 2a. Here, the first display pattern is displayed in the order according to the input procedure of the handy terminal, and the second display pattern is a pattern that is displayed in the order generally performed conventionally. The display pattern is switched by an external command from the outside.

  FIG. 14 is a diagram showing the display order of the first display pattern used in the handy terminal. In the handy terminal, it is assumed that input is performed in the following order: power amount by time period → force measurement active power amount → force measurement reactive power amount → maximum demand power → cumulative maximum demand power → power factor. In the first display pattern, the display order in accordance with this input procedure is set. In the display unit 120, the power amount for each time zone (step S101) → the total daily power amount (step S102) → the active power for power factor measurement Repetitive display is performed in the order of amount and reactive power amount for power factor measurement (step S103) → maximum demand power and cumulative maximum demand power (step S104) → power factor (step S105) → current value display screen (step S106). Is called.

  FIG. 15 is a diagram showing the display order of second display patterns that are generally used. In the second display pattern, the display order according to this input procedure is set, and the display unit 120 sets the power amount by time zone (step S201) → the total daily power amount, the maximum demand power, and the cumulative maximum demand power (step (S202) → Power factor measurement active power amount, power factor measurement reactive power amount and power factor (step S203) → Current display screen (step S204) is repeatedly displayed in this order.

  Thus, according to the watt hour meter which concerns on Example 4 of this invention, the display order of data can be set optimally by selecting arbitrary display patterns. For example, when performing an input using a handy terminal in the field meter reading, if the first display pattern is selected, the input order of the handy terminal and the display order match, and therefore the input operation can be facilitated. Moreover, since the input order and the display order are the same, it is possible to prevent erroneous input.

  Next, processing in the case of changing a contract in the watt-hour meter according to the fourth embodiment of the present invention will be described. When the contract is changed, the control program operates and performs various settings. The control program is a part of the electric energy metering control program of the present invention.

  FIG. 16 is a flowchart showing the processing procedure of the watt-hour meter control program (power meter control program) according to the fourth embodiment of the present invention.

  The process is started after setting information such as a destination, supply and demand calendar, and display pattern is input via the communication circuit (communication unit) 130.

  First, setting based on destination setting information is performed (step S301). Next, based on the supply and demand calendar setting, setting of time zone metering is performed (step S302). Next, the display pattern to be selected is set based on the display pattern setting (step S303).

  Next, the contents of the processing of each step shown in FIG. 16 will be described in detail. FIG. 17 is a flowchart showing a detailed procedure of the destination setting process performed in step S301 of the control program.

  In the destination setting process, first, a destination to be set is selected and input (step S401). The destinations are “for power” and “for PPS”. “For power” means that the power supplier side is a power company, and “for PPS” means that the power supplier side is PPS.

  Next, it is checked whether or not the selected destination is PPS (step S402). Here, when it is determined that the destination is not PPS, that is, for power, the sequence proceeds to step S405. On the other hand, if it is determined that the destination is PPS, it is next checked whether or not to perform time zone measurement (step S403). This is done by inquiring the setter. Here, if it is determined to perform time zone measurement, the sequence proceeds to step S405.

  On the other hand, if it is determined in step S403 that time zone metering is not performed, “no time zone metering” is set as the time zone metering function so as not to distribute the power amount by time zone (step S403). S404). Thereafter, the sequence proceeds to step S405.

  In step S405, a unit of measurement corresponding to the destination is set. That is, if the destination is for power, a unit of measurement for power is set, and if the destination is PPS, a unit of measurement for PPS is set. With the above processing, the destination setting process is completed, and the measurement unit corresponding to the destination is set.

  FIG. 18 is a flowchart showing a detailed procedure of supply and demand calendar setting processing performed in step S302 of the control program.

  In this supply / demand calendar setting process, first, the setting person is designated to select a supply / demand calendar registered in advance (step S501). The supply and demand calendar file is created and registered in advance using commercially available application software. Note that a supply and demand calendar file may be input.

  Next, the number of time zone segments stored in the time zone segment number storage unit 105 is read, and it is checked whether or not the time zone segment number is zero (step S502). The number of time zone sections is set in advance at the time of shipment. Here, when it is determined that the number of time zone sections is zero, the sequence proceeds to step S507.

  If it is determined in step S502 that the number of time zone sections is not zero, the setter is inquired whether to use the power consumption display terminal (step S503). Here, when it is determined that the power consumption display terminal is used, the sequence proceeds to step S507.

  On the other hand, if it is determined that the power consumption display terminal is not used, it is next checked whether or not the number of time zone segments prepared in advance is equal to or greater than the number of time zone segments required for the supply and demand calendar (step S504). ). This is performed by collating the number of time zone segments with the required number of time zone segments defined according to the supply and demand calendar selected in step S501. If it is determined that the prepared number of time zone segments is equal to or greater than the required number of time zone segments, the sequence proceeds to step S508.

  On the other hand, if it is determined that the number of prepared time zone segments is not equal to or greater than the required number of time zone segments, the number of prepared time zone segments is insufficient for the required number of time zone segments. The setter is again inquired as to whether to use it (step S505). Here, when it is determined that the power consumption display terminal is used, the sequence proceeds to step S507. On the other hand, when it is determined that the power consumption display terminal is not used, it is specified that the power consumption display terminal is not used even though the number of prepared time zone segments is not enough. It is judged, an error message is displayed, and the process is terminated (step S506).

  In step S507, since it is specified that the power consumption display terminal is used, it is recognized that the power consumption display terminal calculates the power consumption for each time zone. “None” is set. Thereafter, the sequence proceeds to step S509.

  In step S508, since the number of time zone segments prepared is sufficient for the required number of time zone segments, “with time zone metering” is set as the time zone metering function. Thereafter, the sequence proceeds to step S509.

  In step S509, the selected supply and demand calendar is set. With the above processing, the designation of time zone measurement and the setting of the supply and demand calendar are completed.

  FIG. 19 is a flowchart showing a detailed procedure of the display pattern setting process performed in step S303 of the control program.

  In this display pattern setting process, first, a display pattern selected by the setter is input (step S601). Next, the selected display pattern is set (step S602). Specifically, the selected display pattern is stored in the display pattern storage unit. With the above processing, a display pattern desired by the setter is set, and the display pattern setting processing ends. Here, the set display pattern is reflected in the subsequent display on the display unit 120.

  As described above, according to the watt-hour meter and the used electric energy display terminal according to the present invention, a single unit can cope with an actual amount contract, a seasonal contract, and a PPS supply contract. It is also possible to deal with contract changes without exchanging the instrument.

  Next, a setting method according to each contract of the actual amount contract, the seasonal contract, and the PPS contract will be described.

(1) Setting method in the actual amount contract When installing the electricity meter in the actual amount contract, install a meter with zero time zone classification. Or, install a meter with a non-zero time zone classification set to “no time zone measurement”. These settings are made at the shipping stage before the instrument is installed.

  Thus, when the number of time zone divisions is set to zero or “no time zone measurement”, the calculation function control unit 103 turns off the time zone measurement function. As a result, the measured value is not distributed to the hourly power amount memory 108.

  In this state, the case where the contract is changed from the actual volume contract to the seasonal contract will be described.

  If the number of time zones is set to zero at the time of the actual amount contract, install a power consumption display terminal and change to a seasonal contract. In this case, a supply and demand calendar is set in the instrument by the control program. That is, the sequence in the supply / demand calendar setting process shown in FIG. 18 proceeds from step S501 (supply / demand calendar selection) to step S502 (number of time zone divisions other than zero ?: No) → step S509 (supply / demand calendar setting). Is stored in the supply and demand calendar storage unit 104. After installing the supply and demand calendar, if you install a power consumption display terminal, the power consumption display terminal reads the supply and demand calendar from the watt hour meter, and based on the daily power data read from the watt hour meter, Sort the amount.

  In addition, when the number of time zone segments is set to a value other than zero at the time of the actual amount contract, the setting is changed according to the number of time zone segments of the watt hour meter and the required number of time zone segments. That is, when setting a supply and demand calendar within the number of time zone divisions, the power consumption display terminal is not connected, and the sequence in the supply and demand calendar setting process shown in FIG. 18 is step S501 (demand and supply calendar selection) → step S502 ( Time zone division number is other than zero ?: Yes) → Step S503 (Used electric energy display terminal use: No) → Step S504 (Time zone division number ≧ Calendar setting ?: Yes) → Step S508 (Time zone measurement function = “Yes”) ”) → Step S 509 (Supply and demand calendar setting), and the supply and demand calendar is stored in the supply and demand calendar storage unit 104. Then, the weighing function control unit 103 turns on the weighing function by time zone by “weighing by time zone”. Thereby, the time zone measurement based on a supply-and-demand calendar is performed with this meter, without replacing a meter.

  When setting a supply and demand calendar that is equal to or greater than the number of time zones, a power consumption display terminal is connected. In this case, the sequence in the supply and demand calendar setting process shown in FIG. 18 is step S501 (supply and demand calendar selection) → step S502 (number of time zone divisions other than zero ?: Yes) → step S503 (use of power consumption display terminal: Yes) ) → Step S507 (time zone weighing function = “none”) → Step S509 (supply / demand calendar setting), and the supply / demand calendar is stored in the supply / demand calendar storage unit 104. Then, the measurement function control unit 103 turns off the measurement function by time zone by “no measurement by time zone”. After that, when the power consumption display terminal is installed, the power consumption display terminal reads the supply and demand calendar from the watt hour meter, and distributes the power amount by time zone based on the data of the total daily power amount read from the watt hour meter. .

  Next, a case where the contract is changed from the actual amount contract to the PPS contract will be described.

  In this case, the destination is set in the watt hour meter by the control program. When performing measurement by time zone, the sequence in the destination setting process shown in FIG. 17 is as follows: Step S401 (Destination selection) → Step S402 (Destination = PPS: Yes) → Step S403 (Time measurement: Yes) → Proceed to step S405 (measurement unit setting [PPS]). Since there is no setting change from the actual amount contract (no measurement by time zone), the measurement function by time zone by the measurement function control unit 103 remains off. Then, after setting the destination, the supply and demand calendar is set by the control program, whereby the hourly metering is performed by the watt hour meter or the used power amount display terminal. The supply and demand calendar setting process is the same as that in the case of changing from the above-mentioned actual volume contract to the seasonal contract.

  On the other hand, when measurement by time zone is not performed, the sequence in the destination setting process shown in FIG. 17 is step S401 (destination selection) → step S402 (destination = PPS: Yes) → step S403 (time measurement). : No) → Step S404 (Time zone measurement function = “None”) → Step S405 (Measurement unit setting [PPS]). “No measurement by time zone” is set, and the measurement function control unit 103 is switched off. Then, after setting the destination, the supply and demand calendar is set by the control program, so that the power consumption display terminal measures by time zone.

(2) Setting method for seasonal contracts When installing a watt hour meter based on seasonal contracts, install a meter that has a non-zero time zone classification set to “with measurement by time zone” at the shipping stage. .

  When there is an increase or decrease in the number of time zone categories due to changes in the contract contents of the seasonal contracts, the supply and demand calendar is set in the electricity meter by the control program.

  When setting a supply and demand calendar within the number of time zone divisions, the same processing as the change from the actual volume contract is performed. That is, when setting a supply and demand calendar within the number of time zone divisions, “weighing by time zone” is set to turn on the weighing function by time zone by the weighing function control unit 103, and time zone weighing based on the supply and demand calendar. Is done. Also, when setting a supply and demand calendar that exceeds the number of time zone divisions, the measurement function by time zone by the measurement function control unit 103 is turned off by setting “no measurement by time zone”. After that, when the power consumption display terminal is installed, the power consumption display terminal reads the supply and demand calendar from the watt hour meter, and distributes the power amount by time zone based on the data of the total daily power amount read from the watt hour meter. .

  When changing from the seasonal contract to the PPS contract, the destination is set in the electricity meter by the control program.

  When performing measurement by time zone, the sequence in the destination setting process shown in FIG. 17 is: Step S401 (Destination selection) → Step S402 (Destination = PPS: Yes) → Step S403 (Measurement by time: Yes) → The process proceeds to step S405 (measurement unit setting [PPS]). Since there is no setting change from the seasonal contract (with measurement by time zone), the measurement function by time zone by the measurement function control unit 103 remains on. Then, after setting the destination, the supply and demand calendar is set by the control program, whereby the hourly metering is performed by the watt hour meter or the used power amount display terminal. The supply and demand calendar setting process is the same as that in the case of changing from the above-mentioned actual volume contract to the seasonal contract.

  When measurement by time zone is not performed, the same processing as in the case of changing from the actual amount contract to the PPS contract is performed. That is, by setting “no measurement by time zone”, the measurement function by time zone by the measurement function control unit 103 is switched off. Then, after setting the destination, the supply and demand calendar is set by the control program, so that the power consumption display terminal measures by time zone.

(3) Setting method in the PPS contract When measuring by time zone is not performed in the PPS contract, a meter whose time zone number is zero at the shipping stage, or a meter whose time zone number is not zero is displayed as “No time zone measurement”. Install after setting.

  When measuring by time zone under the PPS contract, set a meter with a time zone number other than zero at the shipping stage set to “with time zone measurement”.

  When changing from such a PPS contract to an actual contract, the destination is set to the power company by the control program. In this case, the sequence of destination setting processing shown in FIG. 17 proceeds from step S401 (destination selection) → step S402 (destination = PPS: No) → step S405 (measurement unit setting [for electric power company]), The unit of measure for the electric power company is set.

  In addition, since the setting of measurement by time zone is not performed, the setting in the PPS contract is continued as it is.

  Next, a case where the PPS contract is changed to the seasonal contract will be described. Also in this case, the destination is set in the electric power company by the control program, and the unit of measure for the electric power company is set by the destination processing, as in the actual quantity contract. In this way, after the measurement unit is set, the supply and demand calendar is set by the control program as in the case of changing from the actual volume contract to the seasonal contract.

  Based on the best mode for carrying out the present invention described above, the present invention can be grasped as follows. That is, in the present invention, in order to solve the above-described problem, in the watt-hour meter that calculates the amount of power used according to the contract between the power consumer and the power supplier, the all-day power storage unit and the measurement pattern storage unit Metering function storage means, hourly power amount storage means, power amount calculation means, weighing function control means, hourly power amount calculation means, display means, display control means, setting means, A watt-hour meter is provided. The all-day energy storage means stores the all-day electricity amount in which the used electricity amount is accumulated, and the measurement pattern storage means stores the measurement pattern corresponding to the time zone in which the power specified by the contract is used, and stores the weighing function The means stores the necessity setting for calculating the power amount by time zone, and the power amount storage means by time zone stores the power amount by time zone.

  The power amount calculation means measures the power amount for each predetermined metering unit, accumulates the measured power amounts, calculates the total daily power amount, and stores it in the total daily power amount storage means. The weighing function control means reads the necessity setting of the weighing function in the weighing function storage means, determines whether or not it is necessary to calculate the electric energy for each time zone, and controls the weighing calculation according to the determination result. According to the metering function control means, the power consumption calculation unit according to the time zone distributes the power amount measured by the power amount calculation unit according to the measurement pattern according to the time zone, calculates a cumulative value for each time zone, and stores the power consumption by time zone. Store in the means. The display control means, when determining that the metering function control means is necessary together with the total power stored in the total power storage means, displays the power by time stored in the power storage by time zone. To display.

  The setting means changes the necessity setting of the weighing function in the weighing function storage means based on the external command. In the watt hour meter having such a configuration, the power amount calculation means measures the power amount for each predetermined measurement unit, calculates the total daily power amount by accumulating the measured value, and stores it in the total daily power amount storage means. The calculation function control means determines whether it is necessary to calculate the power amount for each time zone, and permits execution of the processing by the power amount calculation means for each time zone when it is determined that it is necessary. The necessity of calculating the amount of electric power for each time zone is changed by the setting means. The power calculation unit for each time zone distributes the measured value according to the measurement pattern, and stores the power amount for each time zone in the power storage unit for each time zone. When the execution of the process is not permitted, the power amount for each time zone is not calculated. Then, the display control means displays the hourly power amount together with the total daily power amount when the hourly power amount calculation is performed. If the hourly power amount calculation is not performed, only the total daily power amount is displayed.

  In addition, in order to solve the above problem, the measured value measured by the watt-hour meter is obtained via communication means, and the amount of power used is calculated from the measured value according to the contract between the power consumer and the power supplier. And a display pattern storage means for storing designation of a display pattern for defining a display order of display data, and when the display pattern is designated from the outside, the designated display pattern is converted to the display pattern. Display pattern setting means for storing in the storage means, and display means for reading the designation of the display pattern stored in the display pattern storage means and displaying the display data in order according to the read display pattern. A power consumption display terminal characterized by this is provided.

  According to such a power consumption display terminal, when a display pattern that defines the display order of display data is set, the display data is displayed in order according to the set display pattern.

  In order to solve the above problem, in a power metering control program for calculating the amount of power used according to a contract between a power consumer and a power supplier, the computer uses a predetermined amount of power to the computer. When measuring every measurement unit and storing it as the total daily power amount accumulated in the total daily energy storage means, judging the necessity of calculation of the power amount by time zone from the outside, and determining that the calculation is unnecessary The total daily power amount accumulated in the total daily power storage means is displayed on the display means, and when it is determined that calculation is necessary, the measured power amount is distributed according to the time pattern according to the measurement pattern, and the cumulative value for each time zone is calculated. Then, an electric energy metering control program for executing the procedure is provided, which is stored in the electric energy storage means for each time zone and the stored electric energy for each time zone is displayed on the display means.

  When such a power metering control program is executed by a computer, the amount of power is metered in the set unit of measure, and when it is necessary to calculate the amount of power per time zone by an external command, the power amount per time zone is calculated. Then, the total daily power amount and the hourly power amount are displayed on the display means. When the command from the outside does not require calculation of the electric energy for each time zone, only the total daily electric energy is calculated and displayed on the display means.

DESCRIPTION OF SYMBOLS 1 Electricity meter 1a All-day electric energy storage means 1b Measurement function storage means 1c Measurement pattern storage means 1d Electric energy storage means 1e by time zone Electric energy calculation means 1f Measurement function control means 1g Selector 1h Output selector 1i Electricity by time zone Quantity calculation means 1j Setting means 2 Display section 2a Display pattern storage means 2b Display control means 3 Communication section 10 Power supply section 11 CPU
12 RAM
13 ROM
Reference Signs List 14 Display Control Unit 15 Metering Unit 16 Communication Interface 18 Display Unit 19 Network 20 Voltage Current Detection Unit 21 Current Transformer 22 Step-Down Circuit 30 Power Calculation Circuit 50 LCD Display 60 Communication Circuit 70 Peripheral Circuit 80 CPU
81 Total power memory 82 Clock mechanism 83 Supply and demand calendar 84 Sorting section 85 Time zone memory 85 _{1 to} 85 ₆ First time zone memory to sixth time zone memory 86 Meter reading time zone memory 86 _{1 to} 86 ₆ First meter reading time Band memory to 6th meter reading time zone memory 87 Load survey memory 88 Meter reading all-day electric energy memory 100 Control unit 101 Electric energy calculating unit 102 All-day electric energy memory 103 Calculation function control unit 104 Supply and demand calendar storage unit 105 Time zone division number storage Unit 106 Selector 107 Separator 108 Electric power memory by time zone 109 Output selectors 111 to 116 First to sixth time zone memory 120 Display unit 121 All day electric energy indicator 122 to 127 First to sixth time zone electric energy display 130 Communication circuit

Claims (8)

An electric energy calculation means for calculating the total electric energy by measuring and accumulating the electric energy;
A total daily power storage means for storing the total daily power calculated by the power calculation means;
A weighing pattern storage means for storing a weighing pattern according to a power usage time period determined by a contract between a power consumer and a power supplier;
A weighing function storage means for storing the necessity of calculation of the electric energy for each time zone;
A weighing function control means for determining whether or not it is necessary to calculate a power amount for each time zone based on the contents stored in the weighing function storage means;
When it is determined by the metering function control means that it is necessary to calculate the electric energy for each time zone, every time the total electric energy becomes a predetermined metering unit according to the metering pattern stored in the metering pattern storage means A power amount calculation means for each time zone for distributing the total daily power amount for each time zone and calculating a power amount for each time zone;
A power storage unit for each time zone that stores a power amount for each time zone calculated by the power consumption calculation unit for each time zone;
Display means for displaying the total daily power amount and the hourly power amount;
When it is determined by the metering function control means that it is necessary to calculate the power amount for each time zone, the total daily power amount stored in the all-day power amount storage means and the hourly power amount storage means are stored. A display unit for displaying the amount of electric power by time zone,
Based on an external command, setting means for changing the necessity of calculation of the amount of power by time zone stored in the weighing function storage means;
A watt hour meter characterized by comprising:   2. The watt-hour meter according to claim 1, wherein the setting unit further changes a measurement pattern stored in the measurement pattern storage unit according to a command from the outside. The display unit includes a display pattern storage unit that stores a display pattern that defines a display order of display items, and displays display items in an order according to a display pattern stored in the display pattern storage unit.
The watt-hour meter according to claim 1, wherein the setting unit further changes a display pattern stored in the display pattern storage unit based on a command from the outside. The setting unit changes the unit of measurement in the power amount calculation unit according to the destination input from the outside, and when a measurement pattern is input from the outside, the measurement stored in the measurement pattern storage unit Change the pattern,
The required number of storage areas of the time-specific power storage means defined by the measurement pattern stored in the measurement pattern and the time-specific power consumption of the time-period power storage means provided in advance. The watt-hour meter according to any one of claims 1 to 3, wherein the necessity of calculating the hourly power amount is determined based on the number of storage areas. A communication means for receiving the total daily power obtained by measuring and accumulating the power, and
A total daily power storage means for storing the total daily power received by the communication means;
A weighing pattern storage means for storing a weighing pattern according to a power usage time period determined by a contract between a power consumer and a power supplier;
A weighing function storage means for storing the necessity of calculation of the electric energy for each time zone;
A weighing function control means for determining whether or not it is necessary to calculate a power amount for each time zone based on the contents stored in the weighing function storage means;
When it is determined by the metering function control means that it is necessary to calculate the power amount for each time zone, the total daily power amount is distributed according to the time zone according to the metering pattern stored in the metering pattern storage unit. An hourly electric energy calculating means for calculating an electric energy by band;
A power storage unit for each time zone that stores a power amount for each time zone calculated by the power consumption calculation unit for each time zone;
Display means for displaying the total daily power amount and the hourly power amount;
When it is determined by the metering function control means that it is necessary to calculate the power amount for each time zone, the total daily power amount stored in the all-day power amount storage means and the hourly power amount storage means are stored. A display unit for displaying the amount of electric power by time zone,
A setting means for changing the necessity of calculation of the electric energy for each time zone stored in the weighing function storage means based on a command from the outside,
The display unit includes a display pattern storage unit that stores a display pattern that defines a display order of display items, and displays the display items in an order according to the display pattern stored in the display pattern storage unit. Used power consumption display terminal. In the electric energy metering control program for calculating the electric energy used according to the contract between the electric power consumer and the electric power supplier,
A procedure for calculating the total amount of electricity accumulated by weighing the amount of electricity;
A procedure for displaying the calculated total daily energy when it is determined that the calculation is unnecessary according to a command to determine whether or not to calculate the energy by hour sent from the outside, and the power by hour If it is determined that the calculation of power is necessary, the measured electric energy is distributed according to the time pattern according to the stored measurement pattern, the cumulative value for each time period is calculated and stored, and the stored time period An electric energy metering control program causing a computer to execute a procedure for displaying electric energy.   7. The method of causing the computer to further execute a procedure for displaying the display items in an order according to the display pattern when a display pattern that defines the display order of the display items is designated from the outside. Electric energy metering control program. A procedure for obtaining a predetermined number of time zone divisions when a weighing pattern determined by a contract between an electric power consumer and an electric power supplier is selected according to a power usage time zone; and
If the acquired number of time zone segments is zero, a procedure for storing the selected metric pattern;
When the acquired number of time zone divisions is other than zero and the power consumption display terminal is used, setting that the calculation of the power consumption by time zone is unnecessary and storing the measurement pattern Procedure and
When the acquired number of time zone divisions is other than zero and the power consumption display terminal is not used, the calculation of the power consumption by time zone is performed if the measurement pattern is within the range of the number of time zone divisions. 8. The electric energy metering control program according to claim 6, further comprising: causing the computer to further execute a procedure for storing the metering pattern while setting that the data is necessary.

Images