JP2005147767A - Electric energy billing system and its multi-circuit synthesis electric energy meter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric energy billing system and its multi-circuit synthesis electric energy meter allowing automatic billing with setting an electricity bill including an advanced phase power factor in advance. <P>SOLUTION: The electric energy billing system comprises a billing host computer 5 which calculates an electricity bill, a meter-reading host computer 4 which stores meter-reading data for each meter number of an electric energy meter, and the electric energy meter 1 having a memory which stores the meter-reading data within a predetermined term and the meter number of the electric energy meter. The meter-reading host computer 4 requests the meter-reading data and stores the meter-reading data for each meter number. The billing host computer 5 performs billing calculation on the basis of a predetermined billing computing equation established in advance for each meter number from a maximum amount of electricity consumed, effective electric energy, advanced phase reactive electric energy, and delayed phase reactive electric energy or the average power factor thereof of the electric energy meter of the meter-reading data transmitted from the meter-reading host computer. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a power amount charging system and a multi-circuit combined watt-hour meter, and more particularly to a power amount charging system for charging a late amount of power amount and a fast reactive power amount and a multi-circuit combined watt-hour meter.

  2. Description of the Related Art Conventionally, a multi-circuit synthetic metering system (hereinafter referred to as a multi-circuit synthetic watt-hour meter) as shown in FIG. 4 is known as a system for measuring the power used by facilities that receive large amounts of power from a plurality of circuits. This multi-circuit combined watt-hour meter measures power from a plurality of power supply lines 21a and 22a and adds output pulses from composite transmitters 21 and 22 and composite transmitters 21 and 22 that transmit pulses proportional to the amount of power. And a multi-circuit synthesis display device 24 that displays the added pulses as electric energy.

  In the multi-circuit composite display device 24, the maximum demand power, the active power amount, and the reactive power amount, which are provided with the supply contract for the charge related to the power supply and other supply conditions, are displayed with a predetermined accuracy.

  And the electricity charge by such a multi-circuit composite watt-hour meter measures the active power and the reactive energy, and determines the utilization efficiency (referred to as power factor). The basic fee is discounted.

  A power factor control device for improving the power factor of such electric energy is also known (see, for example, Patent Document 1).

  However, in the conventional multi-circuit composite watt-hour meter, although the technology for controlling the lagging reactive energy, the technology for controlling the phasing reactive power, and the reactive watt-hour meter for measuring the reactive power are known, the lagging reactive power A charge system that assumes only the volume is the basis of the contract between supply and demand.

For this reason, improvements in phase-advanced reactive power when consumers with high-power inductive loads become light loads and power factor improvements for customers who use them in a phase-advanced state more than necessary promote essential energy savings. It was also an issue in doing.
Japanese Examined Patent Publication No. 2-61051

  In recent years, power factor improvement has become an important issue for energy conservation measures. In particular, for customers with large power inductive loads that use a multi-circuit synthetic watt-hour meter, the construction of a power supply system with an optimal power factor that takes into account not only slow reactive energy but also fast reactive energy Is required to promote energy conservation measures.

  However, in the conventional billing system, billing is based on the amount of power targeting only the late phase reactive power amount. Therefore, depending on the consumer, it may be possible to use in a more advanced phase than necessary. The measurement of the amount of electric power that leads to energy saving and the charging system have not been established.

  In other words, there has not been established a billing system that automatically displays charges for evaluating the progress of phase-advanced and late-phase reactive energy and power factor for optimal power factor adjustment, and evaluating power factor improvements. .

  The present invention has been made to solve the above-mentioned problems, and displays phase data of phase advance, slow reactive power amount and power factor thereof, and automatically determines an electricity rate in the case of phase power factor in advance. It is an object of the present invention to provide a billing system for an amount of power that can be easily billed, and to facilitate energy saving and a multi-circuit combined watt-hour meter.

In order to achieve the above object, a billing system for power consumption according to the first invention is a billing system for power consumption, and stores a billing calculation table for storing a billing calculation formula for calculating a power bill and a calculation result. A billing host computer having a billing file to be connected, a billing host computer connected to the billing host computer via a network, and a meter number assigned in advance for each watt-hour meter and for calculating a power bill for a predetermined period from the watt-hour meter A meter reading host computer having a meter reading file for storing the meter reading data, and a watt hour meter connected to the meter reading host computer via a network and having a memory for storing the meter reading data and the instrument number. The meter-reading host computer requests the meter-reading data from the watt-hour meter and transmits the meter-reading data transmitted from the watt-hour meter. Data is stored in the meter reading file for each instrument number, and the accounting host computer uses at least the phase advance energy and the phase delay energy from the meter reading data for each instrument number transmitted from the meter reading host computer. A predetermined charging calculation formula based on the above is extracted from the charging calculation table, charging calculation is performed, and the calculated power charge is stored in the charging file.

  The multi-circuit combined watt-hour meter according to the second aspect of the invention includes a transmitter-equipped watt-hour meter that measures and displays active energy, slow-phase energy, and phase-advancing reactive energy, and a plurality of the transmitter-equipped power A pulse synthesizer that sums up the outputs from the meter, display means for displaying the output of the pulse synthesizer, maximum demand power from the watt-hour meter with transmitter, active energy, phase advance energy, and phase lag A communication interface that transmits electric energy as meter-reading data, and the display means includes a maximum demand power, an active power amount, a fast reactive power amount, a slow reactive power amount, and those for each watt-hour meter with a transmitter. It is characterized by comprising display means for displaying trend data of the average power factor.

  Therefore, according to the present invention, since the phase advance and slow phase power factors are displayed as trend data on the display means of the watt-hour meter and the multi-circuit synthetic watt-hour meter, the optimum adjustment of the power factor at the consumer is possible. Therefore, it is possible to provide a billing system for the amount of electric power and its metric synthesis system.

  Also, as meter reading data from the watt-hour meter and multi-circuit composite watt-hour meter, the maximum demand power, active power amount, phase advance power amount and phase lag power amount are transmitted to the meter reading computer for each instrument number, and the meter reading computer sends the billing computer This metering data is sent to the billing computer, and for each meter number, a billing formula that calculates the phase delay and the phase advance power factor as the power charge is determined in advance for each instrument number, and automatic billing is performed. Therefore, it is possible to provide an electricity billing system and a multi-circuit combined watt-hour meter for promoting power factor improvement.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a configuration diagram of a billing system for electric energy according to the present invention. The power amount billing system of the present invention includes a watt hour meter 1 that guarantees a predetermined accuracy for measuring the amount of power supplied from the feeder 2 to the load 6, and a predetermined period of time transmitted from the watt hour meter 1. Meter reading data for calculating the charge is received via the network 3 and is read from the meter reading host computer 4 and meter reading host computer 4 managed for each meter number of each watt hour meter 1 and each customer. It is composed of a billing host computer 5 that executes billing calculations based on data.

  Next, the configuration of each unit will be described. The watt-hour meter 1 includes an instrument transformer 1a that detects the voltage of power supplied from the power supply line 2 to the load 6, an instrument current transformer 1b that detects the current thereof, an instrument transformer 1a, and an instrument transformer. The power calculation unit 1c calculates power from the output of the fluency switch 1b, and the CPU 1d calculates the amount of power and the power factor for a predetermined period from the output of the power calculation unit 1c based on a predetermined definition.

  Furthermore, a memory 1e that stores the output of the electric energy and power factor calculated by the CPU 1d, a display unit 1f that displays the electric energy and power factor calculated by the CPU 1d, and a communication interface 1g that interfaces communication between the CPU 1d and the outside. It consists of.

  Further, for details of the display unit 1f, for example, trend data in units of hours, days, and months may be used so that the power factor display output obtained by the CPU 1d can be easily evaluated by the consumer in the power factor adjustment state. Can be selected and displayed.

  The trend data of the power factor is obtained when the meter reading computer 4 requests the meter reading data to be transmitted via the communication interface 1g and the network 3 through the communication interface 1g and the network 3. A meter number of this watt-hour meter is assigned together with the amount of power, and the meter number is transmitted to the host computer 4 for meter reading.

  In general, the power factor of a large power consumer with an inductive load such as a motor is improved by a phase adjuster or a power capacitor in a normal load state. If it does so, it will be in the state of advancing power factor in the time zone and season when the induction load becomes light, that is, at midnight such as New Year's holiday, Golden Week, and Bon holiday.

  FIG. 2 shows an example in which such a model of load power factor is displayed on the display unit 1f. FIG. 2A shows a predetermined average power factor transition in units of months, and FIG. 2B shows a daily average power factor transition in units of hours.

  Next, the meter reading host computer 4 is provided with a meter reading file, and the meter reading data from the watt-hour meter 1 connected to the network 3, that is, the maximum demand power, the active power amount, the phase advance energy amount, and the phase delay energy amount. For example, the file is received for each meter number of the watt-hour meter 1 received every predetermined meter reading cycle of one month cycle and given to the meter reading data.

  The billing host computer 5 connected to the network 3 includes a billing calculation table for storing a billing calculation formula and a billing file for storing the billed calculation power charge. The meter reading data transmitted from the meter reading host computer 4 is included in the meter reading data. On the other hand, with reference to a billing calculation table corresponding to each customer and instrument number, a predetermined billing calculation is performed based on a preset billing calculation formula, and the result is stored in a billing file.

  For example, the charge calculation by this charging calculation formula is set to 90% of the reference power factor, proceeds above or below this, the basic fee is discounted at a predetermined rate for each 1% of the delay power factor, and the advance proceeds, It is set so that the price difference between consumers regarding the quality of the delay power factor is clear.

  Next, the operation of the billing system for electric energy configured in this way will be described. The meter-reading host computer 4 requests the watt-hour meter 1 connected to the network 3 to transmit meter-reading data via the network 3 when a predetermined meter-reading date for each meter number is reached.

  Then, the CPU 1d of the watt-hour meter 1 of the requested meter number has the maximum demand power, the active power amount, the fast phase power amount, the slow phase power amount, and the fast phase and slow phase average power factor stored in the memory 1e. The meter number of the watt-hour meter 1 is assigned to the meter-reading data consisting of the above and returned via the communication interface 1g and the network 3.

  Next, the meter reading host computer 4 stores the transmitted meter reading data in a meter reading file filed for each instrument number. When there is a transmission request for the meter reading file for storing the meter reading data from the accounting host computer 5, it is transmitted via the network 3.

  The accounting host computer 5 requests the meter reading host computer 4 for meter reading data for the current month, refers to the meter reading file transmitted, and calculates the accounting from the metering data corresponding to the meter reading data for each consumer and each instrument number. Extract the formula, perform the billing calculation, store the calculated power rate in the billing file for each customer and instrument number, and increase or discount the advanced reactive power amount, late reactive power rate not shown A power bill in which the charge is identified and described is transmitted to the customer together with the meter reading data.

  The consumer can confirm whether the power factor is good or bad and its improved state from the transmitted electricity bill. Then, with respect to the load 6 of the watt hour meter 1, the capacity of the phase adjuster or the capacitor is adjusted with reference to the power factor trend data as shown in FIG. It is possible to adjust the optimum average power factor.

  As a result, the optimum power factor adjustment of the consumer is promoted, waste of essential supply power including not only the phase reactive power but also the phase reactive power is reduced, and energy saving is promoted.

  FIG. 3 is a configuration diagram of a power amount charging system in a multi-circuit composite watt-hour meter that measures the power of a plurality of circuits. The same parts as those in FIG. 1 are denoted by the same reference numerals in the second embodiment, and the description thereof is omitted.

  The second embodiment is different from the first embodiment in that the watt-hour meter 1 according to the first embodiment includes a multi-circuit combined watt-hour meter 10.

  The multi-circuit composite watt-hour meter 10 includes a plurality of watt-hour meters with transmitters 10a and 10b, a pulse synthesizer 10c that synthesizes transmission output pulses of these amounts of power, and a multi-circuit integrated display that displays the output of the pulse synthesizer 10c. The apparatus 10d includes a communication interface 10e that transmits the output to an external device.

  Next, each part of the multi-circuit synthetic watt-hour meter 10 will be described. The transmitter-equipped watt-hour meters 10a and 10b output the amounts of power supplied to the loads 6a and 6b from the power supply lines 2a and 2B, respectively. That is, the maximum demand power, the active power amount, the fast phase reactive power amount, and the slow phase reactive power amount are output as pulse signals.

  These pulse signals are added for each amount of electric power by the pulse synthesizer 10c, and the average power factor for the predetermined period is also calculated. In the multi-circuit integrated display device 10d, the combined maximum demand power, effective The power amount, the fast reactive power amount and the slow reactive power amount and their average power factor are displayed. At this time, the multi-circuit composite display device 10d displays not only the slow average power factor but also the trend of the fast average power factor.

  The unit of the trend to be displayed can be selected according to the purpose, and if it is a daily trend, it is displayed in units of time, and if it is a yearly trend, it is displayed in units of months.

  The meter-reading computer 4 requests meter-reading data for calculating the electric energy charge to the pulse synthesizer 10c via the network 3 and the communication interface 10e, and the pulse synthesizer 1c sends the data for a predetermined period. The combined maximum demand power, active power amount, fast phase reactive power amount and slow phase reactive power amount and average power factor of the combined power meter 10a, 10b with the device are calculated. Reply with instrument number.

  The multi-circuit combined watt-hour meter 10 configured as described above synthesizes power factor trend data on the multi-circuit integrated display device 10d or separates and displays it for each watt-hour meter with transmitter 10a and 10b. In addition, since the display unit can be selected as appropriate, the optimum value of the power factor can be adjusted.

  In addition, the optimum value of the power factor is consistent with the pursuit of the optimum value of the electric energy charge, so that it is possible to promote energy saving even in the consumer.

  In addition, this invention is not limited to said Example, It is possible to modify | change within the range which does not deviate from the main point. For example, it is possible to adopt a measurement system configuration that matches the measurement method and accuracy of the watt-hour meter, change the display method for power factor adjustment as appropriate, and change the calculation formula for billing calculation of power charges It is.

1 is a configuration diagram of an electricity billing system according to an embodiment of the present invention. The example of a display of the power factor of the electric energy of this invention. The charging system by the multi-circuit synthetic | combination watt-hour meter of this invention. Conventional multi-circuit synthetic watt-hour meter.

Explanation of symbols

1 Power Meter 1a Instrument Transformer 1b Instrument Current Transformer 1c Power Calculation Unit 1d CPU
1e Memory 1f Display unit 1g Communication interface 2, 2a, 2b Feed line 3 Network 4 Meter reading host computer 5 Charging host computer 6, 6a, 6b Load 10 Multi-circuit combined watt-hour meter 10a, 10b Power meter with transmitter 10c Pulse synthesizer 10d Multi-circuit integrated display device 10e Communication interface 21, 22 Compound transmitter 23 Pulse synthesizer 24 Multi-circuit integrated display device 26, 27 Load

Claims (6)

A billing system for electric energy,
A charging host computer having a charging calculation table for storing a charging calculation formula and a charging file for storing a calculation result;
Meter reading provided with a meter reading file that is connected to the accounting host computer via a network and stores a meter number given in advance for each watt hour meter and meter reading data for calculating a watt hour fee from the watt hour meter. A host computer for
A power meter connected to the meter reading host computer via a network and having a memory for storing the meter reading data and the instrument number;
The meter-reading host computer requests the meter-reading data to the watt-hour meter, stores the meter-reading data transmitted from the watt-hour meter in the meter-reading file for each meter number,
The charging host computer uses a predetermined predetermined charging calculation formula based on at least the phase advance power amount and the phase delay power amount from the meter reading data for each instrument number transmitted from the meter reading host computer. A billing system for electric energy, wherein billing computation is performed by extracting from a billing computation table, and the calculated power charge is stored in the billing file.   2. The electric power according to claim 1, wherein the meter-reading data is data including at least an active electric energy of the watt-hour meter, a fast reactive energy and a slow reactive electric energy, or an average power factor thereof. Quantity billing system.   2. The electric energy meter according to claim 1, wherein the watt-hour meter has display means for displaying trend data of an active power amount, a fast reactive energy amount and a slow reactive energy amount or an average power factor thereof. Billing system.   The meter-reading file of the meter-reading host computer stores the active power amount, the fast reactive power amount and the slow reactive power amount, or the average power factor thereof separately as the meter reading data for each instrument number. The power billing system according to claim 1, wherein:   The billing file of the billing host computer is configured to store the late-phase reactive power amount and the advanced reactive power amount based on the meter-reading data by distinguishing them from other power rates. Item 2. The electric energy billing system according to Item 1. A watt-hour meter with a transmitter that measures and displays active energy, slow-phase energy, and fast-phase reactive energy; and
A pulse synthesizer that sums the outputs from the plurality of watt-hour meters with the transmitter;
Display means for displaying the output of the pulse synthesizer;
A communication interface that transmits the maximum demand power from the watt-hour meter with the transmission device, the active power amount, the phase advance power amount, and the phase delay power amount as meter-reading data;
The display means includes display means for displaying the trend data of the maximum demand power, active power amount, fast phase reactive power amount, slow phase reactive power amount, and average power factor thereof for each watt-hour meter with transmitter. A multi-circuit synthetic watt-hour meter characterized by that.

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