JP2010020653A - Method and system for calculating design capacity of transformer, and method and system for determining design specification of facility - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To calculate a capacity of a pole transformer which is adapted to a customer's load current by making use of automatic inspection measurement value of a low voltage customer. <P>SOLUTION: A low voltage customer is classified according to a form of contract, consumed electric power is stored in a database, and a standard pattern of the consumed electric power is created. Moreover, by accumulating the standard patterns as data over the years, an increase in the consumed electric power from the past to the present is determined. In determining a capacity of the pole transformer, the form of contract and the number of low voltage customers needed are examined, a form of contract load pattern is extracted from the consumed electric power database, a total power is calculated in each time zone, and an increase in the consumed electric power from the past to the present is multiplied to calculate a capacity of the pole transformer. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a method and system for determining design specifications of equipment that supplies resources or is on a supply line, and in particular, the load capacity of a pole transformer is determined by the power usage of a low-voltage consumer measured by automatic meter reading. The present invention relates to a calculation method and system.

  Currently, the power consumption of individual low-voltage consumers supplied by pole transformers is not measured, and the capacity calculation of pole transformers is the sum of load contracts determined by the contract form of low-voltage consumers and low-voltage demand. It is implemented by a method that multiplies the inequality rate in consideration of the number of houses and the power load demand by region.

  Automatic meter reading for low-pressure customers is expected to expand further in the future.

  The capacity of the pole transformer is calculated by multiplying the contracted capacity of the low-voltage customer by the inequality rate, and the pole transformer is an excessive facility.

  An object of the present invention is to provide a method and a system for determining an appropriate specification (for example, capacity) of equipment (for example, a pole transformer) according to a usage amount of a user.

  An object of the present invention is to provide a method and a system for determining an appropriate specification of equipment according to a user's usage amount, also considering future usage amount.

  The present invention creates a pattern of resource usage with respect to time for each resource usage contract form (for example, power use contract form) with a resource user (for example, a power consumer), and specifications of equipment (for example, Capacity) is determined based on the number of users supplied with resources (eg, power) through the equipment (eg, pole transformer) and the pattern of each user. The total resource usage of the user company to which the resources are supplied is calculated, and the facility specifications are determined based on the resource power usage.

  According to the present invention, the power usage amount with respect to time is patterned for each resource usage contract form with the user, and the specifications of the facility are determined using the pattern. Specific specifications can be determined.

  According to the present invention, the amount of power used with respect to time is patterned for each resource usage contract form with the user, and a change from the past pattern to the current pattern is estimated as a future change, and the pattern is used. In order to determine the specifications of the facility, it is possible to determine an appropriate specification of the facility according to the usage amount of the user, considering the future usage amount.

  The embodiment of the present invention stores the load measurement value obtained by automatic meter reading in a database, assumes the power consumption of the low-voltage customer classified based on this information, and does not perform automatic meter reading. On the other hand, the main feature is the capacity calculation of the pole transformer that supplies power.

  According to the embodiment of the present invention, the power consumption of a low-voltage consumer that has not been automatically metered is estimated based on the power usage of the low-voltage consumer measured by automatic meter reading, and the capacity of the pole transformer is calculated. Therefore, there is an advantage that it is possible to construct a facility that matches the power consumption of the low-voltage consumer.

  In general, pole transformers have less no-load loss when the installed capacity is reduced.

  It is conceivable that a pole transformer with a small equipment capacity can be selected by reviewing the equipment capacity of the pole transformer according to the present invention, and it is possible to reduce the power loss and form the equipment in consideration of the global environment.

  In FIG. 2, the example of the contract form which the electric power company provides to the low voltage | pressure consumer is shown. As a supply contract, a pay-per-use lamp contract that is charged according to the amount of power used and an optional contract that is charged in addition to the amount of power used and in the time period and season used shall be established. For example, late night power contracts that specify only nighttime use from 22:00 to 8:00, the summer season from July 1 to September 30, and the hourly and hourly periods that specify time use from 8:00 to 22:00 A lighting contract and a high load factor lighting contract with a combination of time and season shall be established. Also, contracts are made by combining metered control lights and late-night power, but the seasonal and hourly lights and the high load factor type lights are set to be executed separately.

  Pay-per-use lamp contracts have an upper limit of current to be used, and low-voltage consumers generally have a contract with a large contract current value when there are many electrical appliances used, and a contract with a small contract current value when there are few appliances. Yes. If the contract current is large, the power consumption of the low-voltage consumer will increase, and the power consumption will be increased, and the usage can be patterned by classifying the power consumption according to the contract form of the low-voltage consumer and creating a database. it can. By arranging the power usage of each low-voltage consumer by contract type and each time zone, the power usage for each hour (with respect to time) is patterned.

  The automatic meter reading system shall be installed at the same place as the computer (computer) 1101. The automatic meter reading system is connected to a watt-hour meter with communication function installed in a low-voltage consumer by a telephone line or a dedicated communication line. The automatic meter reading system transmits information on the power consumption, meter reading date and time measured by the watt-hour meter with communication function. Store linked. Information is transmitted to the computer 1101 from the automatic meter-reading system every 30 minutes (unit time), the amount of power used by the low-voltage consumer, the name of the low-voltage customer, the contract type, the date of meter reading, and the time. In this information transmission, the accumulated power usage for one day is stored in the low-voltage consumer power usage table 1102 after 23:30.

  The computer 1101 includes a low-voltage consumer power consumption table 1102, a low-voltage consumer contract form extraction group process 1103, a low-voltage consumer contract form power use table 1104, a low-voltage consumer power use standard pattern creation process 1105, and a low-voltage consumer. Power usage standard pattern table by contract type (past to present) 1106, low-voltage consumer power usage increase calculation processing 1107, low-voltage customer contract type power usage increase table (past to present) 1108, pole transformer capacity Calculation processing 1109 is included. The contents of each table and each process of the computer will be described later. The computer connects a processing device (for example, CPU), a storage device (for example, memory, hard disk), a communication device, an input device (for example, keyboard), a display device (for example, a liquid crystal monitor), and these devices as hardware. And a bus. Each processing is realized by the processing device operating according to a program loaded on the storage device. Each table is constructed (stored) in a storage device. The processing device can access the storage device and search, read, write, and update data of each record in the table.

  1101 in FIG. 1 is a system configuration for calculating the load capacity of the pole transformer from the power consumption of the low-voltage consumer measured by the automatic meter reading system. In the low-voltage consumer power consumption table 1102, the low-voltage consumer name, contract type, meter reading date, time, and power consumption are written from the automatic meter reading system.

  FIG. 3 shows the contract form, low-voltage customer name, date, time, and power consumption in the low-voltage consumer power consumption table.

  FIG. 4 shows a processing outline of the low-pressure customer contract form extraction group processing 1103 of the computer 1101. This processing flow is executed every time information of the low-pressure customer name, contract type, meter reading date, time, and power consumption for one day is transmitted from the automatic meter reading system. The low-voltage consumer contract form, low-voltage customer name, date, date, time, and power consumption are taken in from the low-voltage consumer power consumption table 1102 (2010). Next, they are grouped in a low-voltage consumer contract form, and are stored in the example of the low-pressure consumer-specific contract form power use amount table in FIG. 5 of low-voltage consumer name, date, and time (2020).

  FIG. 5 shows an example of a contract form power usage table 1104 for each low voltage consumer of the computer 1101. This table is grouped according to the low-voltage consumer contract form, and the power usage is stored for each time zone of the date unit for each low-voltage customer name.

  FIG. 6 shows a flow of low voltage consumer power usage standard pattern creation processing 1105 of the computer 1101. First, the contract form, customer name, date, and hourly power usage by low-voltage consumer are read from the 1104 low-voltage consumer contract form power usage table (3010). Next, the maximum electric power consumption is extracted for each time zone of the electric energy consumption for that year (one year) for each type of low-voltage customer contract (3020). For example, in the example of the power usage amount table for each low voltage consumer in FIG. 5, out of the electric power used in each time zone from January 1, 2007 to December 25, 2007 for the consumer A of the metered control lamp 50A contract. The maximum power usage at 0:00 is 25A on December 25, 2007, the maximum power usage at 0:30 is 21A on December 20, 2007, and the maximum power usage at 1:00 is February 1, 2007 If it is set to 22A in a day, these will be extracted, and the electric power consumption which extracted from 0:00 to 23:30 will become the maximum electric power consumption.

  Next, the low-voltage customer power consumption of the same contract form extracted in the processing flow of step 3020 is compared to extract the one with the maximum power usage in each time zone, and the current power usage standard pattern table is created. For example, in the example of the power usage amount table for each low-voltage consumer in FIG. 5, 25 A at 0:00 on December 25, 2007 of customer A is the maximum, and 0:30 on December 24, 2007 is customer B. 26A is the maximum, and 3:00 on December 23, 2007 is the maximum if 27A of the customer B is the maximum, and the current power usage standard pattern table for each low-voltage consumer contract form is created (3030) ).

  Next, a past power consumption standard pattern table is created for each low-voltage consumer contract form for the past year (3040). For example, a standard pattern is created every year from January 1st to December 31st. A standard pattern table for the current year, one year ago, two years ago and every year shall be created.

  In the present invention, a power usage standard pattern is created by paying attention to the maximum power usage of low-voltage consumers, but it is the same by calculating the power usage based on the average and standard deviation of low-voltage consumers and utilizing it as a standard pattern. It is possible to apply with a simple idea.

  FIG. 7 shows an example of a power usage standard pattern table (past to present) 1106 for each low voltage customer contract type of the computer 1101. In this example, there is a power usage standard pattern table for 2007 to a power usage standard pattern table for 1997 for each contract form.

  FIG. 8 shows a flow of low-voltage consumer power usage increase calculation processing 1107 of the computer 1101.

  First, the past year and current table are extracted from the standard table of electric power consumption for each low-voltage customer contract type in FIG. 7 (4010). Next, the maximum value of the power consumption in each time zone is obtained from the power consumption for one year every year (4020). For example, in the contract form of metered control lamp 30A, the maximum value of power consumption in 2007 is 29A on August 10, and the maximum value of power use in 1997 is 21A on July 30 in the same contract form. To extract. Next, the maximum values are compared to determine the amount of increase in power usage (4030). For example, in the above-described example, the difference between the 2007 maximum power consumption 29A and the 1997 maximum power usage 21A is obtained. Next, the increase in power consumption by contract for low-voltage customers is calculated (4040). For example, in the above-described example, 1.38 obtained by dividing the 2007 maximum power consumption 29A by the 1997 maximum power usage 21A is an increase value (increase rate). Instead of the maximum value, an average value or a standard deviation value may be used.

  FIG. 9 shows an example of a power usage increase value table (past to present) 1108 for each low voltage consumer contract type of the computer 1101. This table has a table of increase values of power usage from past to present for each contract type. One year of this increased value indicates that the maximum value of the annual power consumption one year before this year is 1.05 times. Similarly, for 10 years, it shows that the maximum value of annual power consumption 10 years ago from this year is 1.38 times. In other words, the increase from each past year is shown based on the current year.

  FIG. 10 shows a flow of the pole transformer capacity calculation processing 1109 of the computer 1101.

  First, the contract form and the number of eaves of low-voltage customers supplied by existing pole transformers are investigated (5010). For example, a designer who calculates the capacity of a pole transformer goes to the site where the pole transformer is renewed and investigates the contract form of low-voltage customers. Next, the standard pattern of the low-voltage consumer corresponding to the contract form investigated from the contract form power use standard pattern table (1106) is extracted for each house, and the total power use is calculated (5020). For example, in the contract form, if there are two metered control light 30A contracts and one metered light control contract 50A, an example of the power usage standard pattern table (past to present) according to the low voltage consumer contract type in FIG. A load is calculated by adding two standard pattern power consumptions of the metered control lamp 30A and one power amount of the standard pattern of the metered control lamp contract 50A from the standard pattern of the current year. Next, an increase value with the largest increase in the power consumption of the contract form is extracted from the power use increase value table (1108) by contract form (5030). For example, in the example of the contract type metered light 30A and metered light contract 50A in the example of the power usage increase value table (past to present) by low voltage consumer contract type in FIG. The increase value 1.40 times of the metering control lamp 40A having the highest increase value of the maximum power consumption is selected. Since the contract form of the consumer related to this pole transformer is only metered control lamp 30A and metered control light contract 50A, instead of the increase value 1.40 times of metered control light 40A, metered control lamp 30A, metered control The largest increase value 1.38 times may be extracted from the electric power contract 50A.

  Next, multiply the total power consumption of each low-voltage consumer by the largest increase value to calculate the capacity of the pole transformer (5040). For example, in the case where there are two metered control light 30A contracts and one metered light control contract 50A in the above-mentioned contract form, the standard pattern power usage of metered control light 30A from the standard pattern of the current year in 2007 And the total power consumption is calculated by adding the power consumption of the standard pattern of the metered lamp contract 50A. The calculated value was multiplied by an increase value of 1.40 times for the metered control lamp 40A having the highest increase value of the maximum power consumption in the example of the power consumption increase value table (past to present) according to FIG. Calculate the load power. Since the maximum power consumption obtained above is ampere (A), the value of the voltage of the low voltage consumer (for example, 100V) is multiplied by this value to calculate the capacity of the transformer.

  In general, the capacity of a pole transformer is calculated by design work, and a pole transformer having a necessary capacity is prepared. Moreover, since the pole transformers are purchased together by the number of capacities, it is possible to select the pole transformer capacity of the capacity calculated in the present invention.

  In addition, this invention is applicable also when determining the specifications (for example, an output, a size, transmission amount) of power distribution equipment and power generation equipment other than a pole transformer. Furthermore, the present invention is also applicable to the case of supplying / providing resources other than electric power (for example, gas, water, data, content).

  It is considered that a new service will be applied to select pole transformers with capacities that match the power consumption of low-voltage consumers while improving the equipment utilization factor of pole transformers.

System configuration Example of a low-voltage customer contract for an electric power company Example of low-voltage consumer power consumption table Low pressure consumer contract form extraction group processing Example of contract usage by low-voltage consumer Low voltage consumer power usage standard pattern creation processing Example of standard pattern table (past to present) of electricity usage by low-voltage customer contract type Low-voltage consumer power consumption increase calculation processing Example of power consumption increase table (past to present) by low-voltage demand incense contract form Pillar transformer capacity calculation processing

Explanation of symbols

1101: Calculator
1102: Low-voltage consumer power consumption table
1103: Low pressure customer contract form extraction group processing
1104: Contract form of electricity usage by low-voltage consumer
1105: Low-voltage consumer power consumption standard pattern creation processing
1106: Standard pattern table of power consumption by low-voltage customer contract type (past to present)
1107: Low-voltage consumer power consumption increase calculation processing
1108: Electricity consumption increase table by low-voltage demand incense contract form (past to present)
1109: Pillar transformer capacity calculation processing

Claims (6)

Create a pattern of power usage against time for each power usage contract with the customer,
Based on the number of consumers supplied with power through the transformer and the pattern of each customer, the total power consumption of the consumers supplied with power through the transformer is calculated,
A method for calculating a design capacity of a transformer, wherein the capacity of the transformer is calculated based on the total power consumption. A means for creating a pattern of power usage against time for each power usage contract form with a consumer;
Means for calculating a total power usage of consumers supplied with power via the transformer based on the number of consumers supplied with power via the transformer and the pattern of each consumer;
Means for calculating the capacity of the transformer on the basis of the total power consumption. In a design specification determination method for equipment executed on a computer having a processing device and a storage device,
The storage device stores a resource usage contract form and a resource usage amount per unit time for each resource user,
The processing device reads the resource usage per unit time for each resource usage contract form from the storage device, and based on the resource usage per unit time for the time for each resource usage contract form Create a resource usage pattern, store the pattern in the storage device,
When the processing device determines the specifications of the facility, each use to which the resource is supplied through the facility based on the input of the resource usage contract form of each user to which the resource is supplied through the facility A pattern corresponding to the resource usage contract form of the user is read from the storage device, and the resource is supplied via the facility based on the number of users supplied with the resource via the facility and the pattern of each user. Calculate the total resource usage of the supplied users,
A facility design specification determination method, wherein the processing device determines a specification of the facility capable of supplying the total resource usage based on the total resource usage. In a design specification determination system for equipment equipped with a processing device and a storage device,
The storage device stores a resource usage contract form and a resource usage amount per unit time for each resource user,
The processor is
The resource usage amount for each unit time is read from the storage device for each resource usage contract form, and the resource usage pattern with respect to the time for each resource usage contract form based on the resource usage amount for each unit time And storing the pattern in the storage device,
When determining the specifications of the equipment, based on the input of the resource usage contract form of each user who is supplied with resources through the equipment, the resource usage contract form of each user who is supplied with resources through the equipment Of the user who is supplied with the resource via the facility based on the number of users who are supplied with the resource via the facility and the pattern of each user. Calculate the total resource usage,
A facility design specification determination system that determines a specification of the facility that can supply the total resource usage based on the total resource usage. In the equipment design specification determination system according to claim 4,
The processor is
Based on the resource usage per unit time for each user for each resource usage contract form, calculate the maximum or average value or standard deviation value of the resource usage per unit time within a predetermined period,
The facility design specification determination system, wherein the pattern is created using a maximum value, an average value, or a standard deviation value of the resource usage amount per unit time. In the facility design specification determination system according to claim 4,
The processor is
For each predetermined period, the maximum value or average value or standard deviation value of the resource usage per unit time is calculated from the pattern, and stored in the storage device.
The change in the pattern from each past predetermined period to the present predetermined period is calculated based on the maximum value, average value, or standard deviation value of the resource usage amount per unit time for each predetermined period in the storage device. Stored in the storage device,
From the change in the pattern from each past predetermined period to the current predetermined period in the storage device, extract a large value of the pattern change,
A facility design specification determination system that determines the specifications of the facility that can supply the total resource usage by multiplying the total resource usage by a value having a large change in the pattern.

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