JP4820052B2 - Electricity procurement fee deriving device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric power procurement charge deriving apparatus capable of determining an electric power rate for power supply corresponding to a power demand pattern of a consumer based upon the electric power procurement charge needed to supply the electric power. <P>SOLUTION: The electric power procurement charge deriving apparatus 10 which derives the charge needed for electric power procurement for power supply to a consumer 40 is provided with a planning means 3 of generating a power generating operation plan, based upon a power demand pattern from which temporal variation in power demand amount of the consumer 40 is known, from which temporal variation concerned with power generating operations of power generating facilities 20a and 20b is known and an electric power selling/buying plan from which temporal variation regarding selling and buying of excessive electric power and deficient electric power generated when the power generating facilities 20a and 20b are operated according to the power generating operation plan, and a charge deriving means 5 of deriving an electric power procurement charge generated when the generated power generating operation plan and power selling/buying plan are implemented. <P>COPYRIGHT: (C)2005,JPO&amp;NCIPI

Description

  The present invention relates to a power procurement fee deriving device for deriving a fee required for power procurement for performing power supply according to a power demand of a consumer.

  Conventionally, the power charges charged by power suppliers such as general electric utilities to power consumers can be divided into basic charges and pay-as-you-go charges. It is derived by multiplying the unit price of electric power charge, which is a value added with an appropriate profit, by the amount of power demand for one month (see, for example, Patent Document 1).

  This unit price of electricity is set to, for example, an amount obtained by adding profits to the unit price of power procurement required for power generation and transmission in the previous fiscal year. In other words, the power procurement fee for the previous fiscal year is set to the current fiscal year. The fee setting method was used to collect at the site.

JP 2002-271981 A

  When the price setting method as described above is adopted, when a power supply / demand contract between a power supplier such as a general electric utility and a customer continues for a long period of time over a period of several years, the power supplier is required to generate and transmit power. The necessary electricity procurement fee can be reliably collected in the next fiscal year, but if the power supply / demand contract between the power supplier and the customer ends within, for example, one year, it occurs in the current fiscal year. There is a possibility that the electricity procurement fee required for power generation and transmission cannot be collected in the next fiscal year.

  In other words, the conventional unit price of electricity that was applied to consumers for derivation of the electricity rate is different from the unit price of power currently supplied to consumers, so it has actually occurred. It is completely unknown whether or not the power procurement fee required for power generation and transmission can be recovered by the power fee derived using the power procurement unit price set by the conventional fee setting method.

  Furthermore, if it is attempted to supply electric power according to the electric power demand pattern of a consumer whose electric power demand changes every moment, it is necessary to change the operation mode of the power generation equipment etc. every moment according to the electric power demand pattern. Actually, the power procurement unit price also changes from moment to moment. In other words, even if the daily power demand is the same, if the daily power demand pattern is different, the daily unit price for power procurement will be different. Since power demand patterns are not considered at all, there is a problem that an appropriate power procurement unit price is not applied to consumers.

  The present invention has been made in view of the above-described problems, and the purpose thereof is to calculate the power rate when power is supplied in accordance with the power demand pattern of the consumer, and the power required to perform the power supply. An object of the present invention is to provide a power procurement fee deriving device that can be determined based on a procurement fee.

The characteristic configuration of the power procurement fee deriving device according to the present invention for achieving the above object is a power procurement fee deriving device that derives a fee required for power procurement for supplying power to a consumer, realized by a computer. There,
A power demand pattern that represents a change in the amount of power demand of a customer stored in the storage means in a day, a base demand pattern that becomes a constant demand pattern in a predetermined period, and a specific period that is shorter than the predetermined period A pattern dividing means for dividing into a peak demand pattern that is a constant demand pattern and an adjustment demand pattern that is a residual after subtracting the base demand pattern and the peak demand pattern from the power demand pattern;
When the rated power output, the power generation cost at the rated power output, and the rated power output of the power generation facility or facilities that are stored in the storage means and can be operated to supply power to the consumer are not Power generation cost for procuring power corresponding to the base demand pattern by referring to the information about the power generation cost and the information about the price when buying insufficient power and the price when selling surplus power Create an operation plan for the power generation facility for base demand procurement when the facility is selected as the power generation facility for base demand procurement and the power corresponding to the base demand pattern is procured, and the power corresponding to the peak demand pattern is procured Power generation equipment with a low power generation cost is selected as the power generation equipment for peak demand procurement, and the power corresponding to the peak demand pattern is adjusted. Create an operation plan for the power generation equipment for peak demand procurement at the time, and reduce the power purchase fee when purchasing insufficient power corresponding to the adjustment demand pattern, and correspond to the adjustment demand pattern A planning means for creating a power trading plan for the purpose of increasing the power selling fee when selling surplus power;
Information about the power generation cost at the time of rated power generation output of the one or more power generation facilities and the power generation cost when it is not the rated power generation output stored in the storage means, as well as the price and surplus when buying the insufficient power power that occurs when you are referring to the information of prices when selling the power, you run the base demand operational plan for power generation equipment procurement and operation plan of the peak demand procurement for power generation equipment and said power trading plan A charge deriving means for deriving a power procurement fee required to procure
Said pattern dividing means, said planning means in cooperation with said base demand patterns to reduce the procurement price for the corresponding power to the to reduce power procurement price for corresponding to the peak demand patterns, the adjustment demand patterns corresponding to the insufficient power to reduce the power purchase price for when power purchase, said to make large power sale price for when sell electricity surplus power corresponding to the adjustment demand patterns, the said power demand pattern Baie was divided over the scan pattern of demand and the peak demand pattern and said timing oilseed demand patterns, the rates deriving means, divided by said pattern dividing means, said base over scan demand patterns and the peak demand in accordance with the said control oilseed demand pattern and the pattern, said of where the plan means has been created, the base operation plan of demand procurement for power generation equipment and the peak demand procurement It said the operation plan of power generation facilities on the basis of the power buying and selling plan to derive the power procurement fee, there is a power procurement fee, which is the led to the consumer in terms of the fee required for the power procurement for supplying electric power.

According to the above Kitoku Features configuration, since the actual expenses required in the electricity procurement for consumers is derived, when performing the negotiations to conclude a power supply contract between the consumer, the power demand situation of consumers It is possible to present an appropriate power charge.
Therefore, it is possible to provide an electric power procurement fee deriving device that can determine an electric power fee when electric power is supplied in accordance with an electric power demand pattern of a consumer based on the electric power procurement fee required for the electric power supply. .

Another characteristic configuration of the power procurement fee deriving device according to the present invention is that an instantaneous power value of a demand pattern that is a constant part in a one-day power demand pattern that is input by a consumer and an addition to the demand pattern that is the constant part An input means for accepting an input of a time range for defining the specific period when another specific demand pattern to be a part has the specific period, and the planning means has a total daily power demand A time range for deriving the remaining power demand by subtracting the product of the instantaneous power value of the demand pattern that is the constant part and 24 hours from the quantity, and defining the specific demand period for the remaining power demand The demand pattern as the constant part and another constant demand pattern as the additional part are derived by deriving the instantaneous power value in the time range for defining the specific period by dividing by In that it is configured to determine the power demand pattern of the day it is a sum of.

According to the above characteristic configuration, even if the temporal change in the power demand pattern is unknown, the consumer's daily power demand amount and the instantaneous power of the constant power demand that is continuous in a predetermined period of the power demand pattern Based on the value and the time range for defining the specific period, it is possible to derive a power demand pattern that represents a change in the amount of power demand of the consumer during the day.

The power procurement fee deriving device according to the present invention will be described below with reference to the drawings.
FIG. 1 shows a power procurement fee deriving device for deriving a fee required for power procurement for supplying power to a customer 40 from a power generation facility 20 (20a, 20b) and a power trading market 30 via a power system 50. FIG. 10 is a functional block diagram of the power generation facility 20 based on a power demand pattern ( which represents a change in the power demand of the customer during the day) in which the temporal change in the power demand of the customer 40 can be understood. and the power generation operation plan concerning, planning means 3 that the surplus power and lack of power that occurs when you operate the power plant 20 in accordance with the power generation operation plan, to create and regarding that power trading plan to trade for the power trading market 30 And a charge deriving unit 5 for deriving a power procurement fee generated when the power generation operation plan and the power trading plan created by the plan unit 3 are executed. Note that more power generation facilities 20 and consumers 40 than shown in FIG. 1 may be connected to the power system 50.

  The power procurement fee deriving device 10 includes an input unit 1 that receives input of information, a storage unit 2 that stores the input information and information handled inside the power procurement fee deriving device 10, and a power demand pattern. Is divided into a plurality of divided demand patterns, and an output unit 6 for outputting the power procurement fee derived by the fee deriving unit 5 to the outside is provided. It can be realized by a typical computer.

  The electric power demand pattern which understands the time change of the consumer 40 is, for example, a measured value which measures the electric power demand amount such as every 30 minutes and every hour with a meter installed on the consumer 40 side and understands the temporal change. You can know by getting. In addition, it is possible to estimate a power demand pattern in which a temporal change in one day can be estimated from a power demand amount for one month acquired by a normal meter-reading operation. Table 1 below shows measured values of the amount of power demand for a certain customer 40 for one month. Conventionally, for example, a predetermined power unit price of 13.22 yen / kWh is multiplied by this power demand, and the power charge of the customer 40 is derived and charged.

  For example, when estimating a power demand pattern in which the temporal change during one day as shown by the solid line in FIG. 2 is estimated from the power demand in August: 7263 (MWh), the planning means 3 of the power procurement fee deriving device 10 Is a power demand amount in a unit period such as one day, one week, and one month (in the following embodiment, power demand amount in August: 7263 (MWh) is used) and a predetermined period of this power demand pattern The instantaneous power value of constant power demand (corresponding to A in FIG. 2) that is continuous during one day on August weekdays, and this power demand pattern is an additional part to the power demand that is continuous in the predetermined period. The demand peak time range (corresponding to B in FIG. 2) when the demand peak is present is received from the customer 40 via the input means 1.

  The planning means 3 divides August power demand amount: 7263 (MWh) into a power demand amount for one day on weekdays (26 days) and a power demand amount for one day on holidays (5 days) at a predetermined ratio. The power demand amount for one day on weekdays: about 253.2 (kWh) and the power demand amount for one day on holidays: about 135.4 (kWh). And the plan means 3 of the constant demand pattern which has the constant demand pattern which becomes a constant part in the electric power demand pattern for one day inputted by the consumer 40 via the input means 1 A time range for defining the specific period when the specific period has the instantaneous power value (corresponding to A in FIG. 2) and a certain demand pattern that is an additional part to the base demand pattern. 2) (corresponding to B of 2). FIG. 3 (a) shows a one-day power demand pattern for August weekdays derived by the planning means 3, and FIG. 3 (b) shows one of August holidays similarly derived. This is the daily power demand pattern. Further, when a rise time range up to the specific period (corresponding to C in FIG. 2) and a fall time range after the specific period (corresponding to D in FIG. 2) are received, a more accurate power demand A pattern can be derived.

Next, planning means 3, as shown in FIGS. 3 (a) and 3 (b), depending on the power demand pattern temporal change of the derived one day is found, power generation operation plan of the power generation facility when, a power trading plan surplus power and under power generated when operating the power generation equipment in accordance with the power generation operation plan, the power demand pattern as shown in FIGS. 3 (a) and 3 (b) dividing It produces according to each of the some division | segmentation demand pattern obtained by doing. As illustrated in FIG. 4, the pattern dividing unit 4 divides the power demand pattern into a base demand pattern that is divided from the power demand pattern so as to have a certain demand pattern for a predetermined period, and a certain demand pattern as the predetermined demand pattern. Demand for adjustment corresponding to the remainder after subtracting the base demand pattern and the peak demand pattern from the power demand pattern, and the peak demand pattern divided from the power demand pattern so as to have a specific period shorter than the period Divided into patterns.

In addition, the storage unit 2 stores information on the characteristics of one or a plurality of power generation facilities that can be operated to supply power to the consumer 40, and the information on the characteristics of the power generation facilities includes: There are information such as the rated power output, the power generation cost at the rated power output (including the cost of transmitting power to the customer 40), and the power generation cost when it is not the rated power output. Then, the planning means 3 reduces the base power procurement fee for the base power procurement power generation facility (for example, the power generation facility 20a in FIG. 1) suitable for procuring power corresponding to the base demand pattern. The purpose is selected with reference to the information on the power generation cost described above, and a power generation operation plan for the base power procurement power generation facility 20a is created. In addition, the planning unit 3 reduces the peak power procurement fee for a power generation facility for peak power procurement suitable for procuring power corresponding to the peak demand pattern (for example, the power generation facility 20b in FIG. 1). The power generation operation plan of the power generation facility 20b for peak power procurement is created by selecting and referring to the information on the power generation cost described above as an object. The planning means 3 aims to reduce the power purchase fee when purchasing insufficient power corresponding to the adjustment demand pattern, and to increase the power sale fee when selling surplus power. Create a power trading plan for the purpose.
That is, the pattern dividing unit 4 cooperates with the planning unit 3 to reduce the power procurement fee for base power, reduce the power procurement fee for peak power, and reduce the power purchase fee when purchasing insufficient power. The power demand pattern is divided into a plurality of divided demand patterns (base demand pattern, peak demand pattern, adjustment demand pattern) so as to increase the power selling fee when surplus power is sold. In FIG. 1, only one base power procurement power generation facility 20a and one peak power procurement power generation facility 20b are depicted, but there are a plurality of base power procurement power generation facilities 20a and peak power procurement power generation facilities 20b. There are cases where there is a stand and an appropriate power generation facility is selected and operated, or a plurality of power generation facilities are combined and operated.

The charge deriving unit 5 generates a power procurement fee (one or a plurality of power generation facilities stored in the storage unit) generated when the power generation operation plan and the power trading plan of the power generation facility created by the plan unit 3 are executed. Referring to the information about the power generation cost at the rated power output and the power generation cost when it is not the rated power output, the operation plan for the power generation equipment for base demand procurement, the operation plan for the power supply equipment for peak demand procurement, and the power trading running and plan to leave conductive power procurement fee) required to raise power. The derived power procurement fee can be output and presented to the outside via the output means 6. The output presentation method includes a method of outputting a power procurement fee derived to a display device such as a cathode ray tube or a liquid crystal display device as the output unit 6, or a power derived to a printing device (printer) as the output unit 6. There is a method to output the procurement fee.

  Illustrated in Table 2 are the power procurement fee values derived by the power procurement fee deriving device 10 described above. Specifically, “Fixed (yen / kWh)” is the power procurement fee required to procure power corresponding to the base demand pattern, and “Weekday fluctuation (yen / kWh)” and “Holiday fluctuation (yen / kWh) ”is a power procurement fee required to procure power corresponding to the peak demand pattern and the adjustment demand pattern. The bottom row of Table 2 shows the average value of the electricity procurement fee required to procure the electricity demand for one month including weekdays and holidays. The average value of the electricity procurement fee for one year Is 11.26 yen / kWh.

  As described above, a unit price of 11.26 yen / kWh can be derived as the power procurement fee derived using the power procurement fee deriving device 10 according to the present invention. 1 can be compared with 13.22 yen / kWh). In other words, in this embodiment, even if the price is reduced by a maximum of 1.96 yen / kWh compared to the conventional predetermined power unit price, no profit or loss will occur, and the power procurement fee deriving device 10 according to the present invention will be reduced. By using, compared with the conventional method of presenting a predetermined power unit price to the consumer 40 when conducting negotiations for the conclusion of the power supply contract with the consumer 40, It is possible to proceed with favorable negotiations in terms of charges while ensuring that there are no profits or losses.

<Another embodiment>
<1>
In the said embodiment, the risk regarding changing the electric power demand pattern of the consumer 40 illustrated to Fig.3 (a) and FIG.3 (b) by various reasons, such as a change of the weather pattern or the lifestyle pattern of the customer 40, is shown. Although not included, it is also possible to derive a power procurement unit price to be output to the consumer 40 after including a risk related to such a change in the power demand pattern of the consumer 40. For example, FIG. 5 is a modified example of FIG. 3A and shows a power demand pattern of the customer 40 on August weekdays when the power fluctuation error (risk) indicated by the error bar is taken into consideration.

  Then, using the power demand pattern considering the risk as illustrated in FIG. 5A, the power unit price is derived by deriving the power procurement fee in the same manner as the above embodiment, and the conventional power unit price (13.22 yen) When the permissible margin for price reduction from / kWh) is derived, the probability distribution of the permissible margin for reduction derived is as shown in the graph of FIG. In other words, considering the risk, the possibility of exceeding the price reduction allowable margin (1.96 yen / kWh) derived in the above embodiment is about 5.18%, and the possibility of being below 94.82%. Then, the average value of the allowance for price reduction when considering the risk is 1.84 (yen / kWh). Further, FIG. 5C illustrates a graph of a price reduction allowable margin determined by how much risk is allowed. If a 5% confidence interval is provided, the price reduction allowable margin is 1.68. (Yen / kWh). Therefore, if the power supplier presents the price reduction from the conventional power unit price to the customer 40 and negotiates the power supply and demand contract within the range of the allowance for price reduction, there is a possibility that the profit and loss may occur in itself. Can be lowered.

<2>
In the above embodiment, an example of a customer's power demand pattern has been described as having one power demand peak as shown in FIG. 2 or FIG. 3, but the power demand pattern has a plurality of power demand peaks. It doesn't matter. For example, when deriving a power demand pattern that can understand temporal changes in one day based on the amount of power demand for one month by a consumer, each of a plurality of power demand peak time ranges corresponding to B in FIG. 2 is input. Accepting via the means 1, the planning means 3 may derive a power demand pattern that shows the temporal change as shown in FIG.

Configuration diagram of power system and power procurement fee derivation device Power demand pattern model Power demand pattern graph Split power demand pattern graph (A) is a graph of a power demand pattern, (b) and (c) are graphs of a margin for price reduction.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Input means 2 Memory | storage means 3 Planning means 4 Pattern division | segmentation means 5 Charge derivation means 6 Output means 10 Electricity procurement fee derivation apparatus 20 Electric power generation equipment 20a Electric power generation equipment for base electric power procurement 20b Electric power generation equipment for peak electric power procurement 30 Electric power transaction market 40 Customers 50 Power system

Claims (2)

A power procurement fee deriving device for deriving a fee required for power procurement for power supply to a consumer realized by a computer,
A power demand pattern that represents a change in the amount of power demand of a customer stored in the storage means in a day, a base demand pattern that becomes a constant demand pattern in a predetermined period, and a specific period that is shorter than the predetermined period A pattern dividing means for dividing into a peak demand pattern that is a constant demand pattern and an adjustment demand pattern that is a residual after subtracting the base demand pattern and the peak demand pattern from the power demand pattern;
When the rated power output, the power generation cost at the rated power output, and the rated power output of the power generation facility or facilities that are stored in the storage means and can be operated to supply power to the consumer are not Power generation cost for procuring power corresponding to the base demand pattern by referring to the information about the power generation cost and the information about the price when buying insufficient power and the price when selling surplus power Create an operation plan for the power generation facility for base demand procurement when the facility is selected as the power generation facility for base demand procurement and the power corresponding to the base demand pattern is procured, and the power corresponding to the peak demand pattern is procured Power generation equipment with a low power generation cost is selected as the power generation equipment for peak demand procurement, and the power corresponding to the peak demand pattern is adjusted. Create an operation plan for the power generation equipment for peak demand procurement at the time, and reduce the power purchase fee when purchasing insufficient power corresponding to the adjustment demand pattern, and correspond to the adjustment demand pattern A planning means for creating a power trading plan for the purpose of increasing the power selling fee when selling surplus power;
Information about the power generation cost at the time of rated power generation output of the one or more power generation facilities and the power generation cost when it is not the rated power generation output stored in the storage means, as well as the price and surplus when buying the insufficient power power that occurs when you are referring to the information of prices when selling the power, you run the base demand operational plan for power generation equipment procurement and operation plan of the peak demand procurement for power generation equipment and said power trading plan A charge deriving means for deriving a power procurement fee required to procure
Said pattern dividing means, said planning means in cooperation with said base demand patterns to reduce the procurement price for the corresponding power to the to reduce power procurement price for corresponding to the peak demand patterns, the adjustment demand patterns corresponding to the insufficient power to reduce the power purchase price for when power purchase, said to make large power sale price for when sell electricity surplus power corresponding to the adjustment demand patterns, the said power demand pattern Baie was divided over the scan pattern of demand and the peak demand pattern and said timing oilseed demand patterns, the rates deriving means, divided by said pattern dividing means, said base over scan demand patterns and the peak demand in accordance with the said control oilseed demand pattern and the pattern, said of where the plan means has been created, the base operation plan of demand procurement for power generation equipment and the peak demand procurement Deriving the power procurement fee based on the operation plan of the power generation facility and the power trading plan, and using the derived power procurement fee as a fee required for power procurement for supplying power to consumers apparatus. The daily power demand input by the customer, the instantaneous power value of the demand pattern that is a constant part in the daily power demand pattern, and another constant that is an additional part to the demand pattern that is the constant part When having a demand pattern for a specific period, an input means for receiving an input with a time range for defining the specific period,
The planning means derives the remaining power demand by subtracting the product of the instantaneous power value of the demand pattern that is the constant part and 24 hours from the power demand for the day, and the remaining power demand Is divided by the time range for defining the specific period, and the instantaneous power value in the time range for defining the specific period is derived, so that the demand pattern as the constant part and the additional part as the additional part are derived. The power procurement fee deriving device according to claim 1, wherein the power procurement fee derivation device is configured to determine the daily power demand pattern consisting of a sum of the predetermined demand pattern.

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