Self-consignment amount calculation system and program

Abstract

To provide a self-consignment amount calculation system and a program that can suppress an occurrence of an expensive imbalance charge.SOLUTION: A self-consignment amount calculation system that calculates the amount of electric power for self-consignment includes: a storage unit 11 that stores prediction tightness degree information indicating a prediction tightness degree that is the amount of margin for supply with respect to demand of a commercial power system predicted for a future unit time; and an arithmetic processing unit 12 that calculates the amount of electric power to be subjected to the self-consignment in the unit time before the arrival of the unit time based on the prediction tightness degree of the future unit time, which is indicated by the prediction tightness degree information stored by the storage unit 11. When the prediction tightness degree in the future unit time indicates that the margin is equal to or less than a predetermined amount, the arithmetic processing unit 12 calculates the amount of electric power to be subjected to the self-consignment in the unit time so as to be equal to or lower than an upper limit value.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a self-consignment amount calculation system and a program for calculating an amount of electricity to be self-consignment. [Background technology]

[0002] As a result of the liberalization of the electric power industry, the number of new electric power companies (specified-scale electric power companies, PPS: Power Producer and Supplier), which are companies that retail electricity separately from general electric power companies, has increased. Because new electric power companies do not have their own transmission networks to supply electricity to their customers, they supply (transport) electricity via the commercial power system, which is a transmission network managed by general electric power transmission and distribution companies.

[0003] While allowing new power suppliers to supply electricity is desirable in terms of mitigating the electricity supply-demand constraints, it also poses the risk of causing instability in the commercial power grid (e.g., voltage and frequency abnormalities, large-scale blackouts, etc.). Therefore, new power suppliers are required to supply the same amount of electricity as their planned value (the amount of electricity they have announced in advance) or the actual electricity demand of their customers (simultaneous balancing). Furthermore, if a new power supplier fails to meet the planned amount, the general electric utility will stabilize the power supply in the commercial power grid by adjusting its power generation output to compensate for the failure. In this case, the new power supplier will be obligated to pay an imbalance fee, which acts as a penalty for threatening the stability of the commercial power grid. The amount of the imbalance fee is linked to the severity of the supply-demand constraints in the commercial power grid. The more severe the supply-demand constraints in the commercial power grid, the greater the impact on the commercial power grid, and therefore the higher the imbalance fee.

[0004] Incidentally, in order to alleviate the tightness of the power supply and demand, it is preferable to have more businesses that can supply power to the commercial power grid, not just new power businesses. For example, Patent Document 1 proposes a self-dispatch support device that supports self-dispatch, in which power generated by a business is supplied (dispatched) to the business itself or to a company with a close relationship with the business, thereby encouraging the business to supply power to the commercial power grid. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-163780 Summary of the Invention [Problem to be solved by the invention]

[0006] Even in the case of self-consignment, if the amount of power supplied deviates from the planned value, an obligation to pay a high imbalance fee arises, which is one of the reasons that prevents the spread of self-consignment. The self-consignment support device proposed in Patent Document 1 can reduce the contracted power through self-consignment, but it is difficult to prevent the occurrence of high imbalance fees.

[0007] The present invention has been made to solve the above-mentioned problems, and provides a self-consignment amount calculation system and program that can suppress the occurrence of high imbalance charges. [Means for solving the problem]

[0008] In order to achieve the above-mentioned object, the self-transmission amount calculation system disclosed below is a self-transmission amount calculation system that calculates the amount of self-transmission electricity that electricity supplied by a power supply facility operated by a business operator to a commercial power system is lent to an electricity consumption facility operated by the business operator or another business operator belonging to the same business entity as the business operator and that receives and consumes electricity from the commercial power system.The system includes a memory unit that stores predicted tightness information that indicates a predicted tightness, which is the magnitude of the supply surplus against demand in the commercial power system predicted for a future unit time, and an arithmetic processing unit that calculates the amount of electricity to be self-transmitted for a unit time before the arrival of the unit time based on the predicted tightness for the future unit time indicated by the predicted tightness information stored in the memory unit.When the predicted tightness for the future unit time indicates that the surplus is less than a predetermined amount, the arithmetic processing unit calculates the amount of electricity to be self-transmitted for the unit time to be less than an upper limit value. [Effects of the Invention]

[0009] According to the self-consignment amount calculation system, when the supply and demand of the commercial power grid is tight and there is a high possibility that the imbalance fee will be high, it is possible to suppress the occurrence of the imbalance fee. Therefore, it is possible to suppress the occurrence of high imbalance fees. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a conceptual diagram showing an overview of self-consignment. [Figure 2] FIG. 2 is a block diagram showing an example of the configuration of the self-consignment amount calculation system 1 according to the embodiment of the present invention. [Figure 3] FIG. 3 is a diagram showing an example of a method for calculating the self-consignment amount by the calculation processing unit 12. In FIG. DETAILED DESCRIPTION OF THE INVENTION

[0011] An embodiment of the present invention will be described below with reference to the drawings. The present invention is not limited to the following embodiment, and appropriate design modifications can be made within the scope of the configuration of the present invention. In the following description, the same reference numerals are used in different drawings for identical parts or parts having similar functions, and repeated description thereof will be omitted. The configurations described in the embodiment and modified examples may be combined or modified as appropriate. To facilitate understanding of the description, the drawings referred to below show simplified or schematic configurations, or some of the configurations may be omitted.

[0012] <<Self-consignment>> First, self-consignment will be described with reference to the drawings. Figure 1 is a conceptual diagram showing an overview of self-consignment.

[0013] As shown in Figure 1, self-consignment is the interchange of electricity supplied by a power supply facility S operated by a specified business operator B1 to a commercial power system P with an electricity consumption facility D that receives electricity from the commercial power system P and consumes it. However, the electricity consumption facility D is operated by the business operator B1 that operates the power supply facility S or another business operator B2 that belongs to the same business entity as the business operator B1 (for example, a group of multiple businesses that have a close relationship, such as belonging to the same corporate group or having a long-term business relationship).

[0014] When self-consignment is performed, the business operator (e.g., a general electricity transmission and distribution business operator) that manages the commercial power system P processes the settlement so that the amount of electricity that the power consumption facility D receives from the commercial power system P and consumes is reduced by the amount of electricity that the power supply facility S supplied to the commercial power system P. In addition, the business operator B1 that operates the power supply facility S will pay the business operator that manages the commercial power system P a fee according to the amount of electricity that it supplied to the commercial power system P by self-consignment.

[0015] Unlike regular wheeling, which is an electricity business conducted by new power companies and the like with the aim of pursuing profits, self-wheeling is a non-electricity business aimed at the self-consumption of surplus electricity, and has the aspect of responding to public interest requests to increase the amount of electricity supplied to the commercial power system P. Furthermore, compared to regular wheeling, which is an electricity business, self-wheeling, which is a non-electricity business, does not supply as much electricity to the commercial power system P, so even if self-wheeling does not go as planned and fails, the degree to which it impairs the stability of the power in the commercial power system P is small.

[0016] In light of these circumstances, in self-dispatch, compared to normal dispatch, terms of use that are more favorable to the business operator supplying power to the commercial power system P can be set. For example, in self-dispatch, a cheaper fee structure than in normal dispatch can be adopted (for example, a completely pay-as-you-go system with no basic fee can be selected). Also, for example, in self-dispatch, the conditions for determining that a power supply that satisfies the simultaneous and balanced amount has failed (conditions for the occurrence of the obligation to pay an imbalance fee) can be more relaxed than in normal dispatch.

[0017] If many utilities perform this self-consignment, the amount of power supplied to the commercial power system P will increase, thereby alleviating the tightness of the power supply and demand. Furthermore, as described above, the degree to which a failure in self-consignment impairs the stability of the power in the commercial power system P is small, so even if many utilities perform self-consignment, the power in the commercial power system P can be kept stable.

[0018] However, even if the terms of use can be set that are more favorable to operators than for regular wheeling (for example, cheaper fee structures, relaxed criteria for determining simultaneous and equal volume failures), the high imbalance charges incurred are one of the reasons why operators are reluctant to introduce self-wheeling.

[0019] The self-transmission amount calculation system according to the embodiment of the present invention described below solves this problem, promoting self-transmission by suppressing the occurrence of imbalance charges, and increasing the amount of electricity supplied to the commercial power system P, thereby alleviating the tightness of electricity supply and demand.

[0020] <<Self-Consignment Amount Calculation System>> An example of the configuration of a self-consignment amount calculation system according to an embodiment of the present invention will be described with reference to the drawings. Fig. 2 is a block diagram showing an example of the configuration of a self-consignment amount calculation system 1 according to an embodiment of the present invention.

[0021] As shown in FIG. 2, the self-consignment amount calculation system 1 includes a storage unit 11 and a calculation processing unit 12. The storage unit 11 is configured with a non-volatile storage device such as a hard disk drive (HDD) or a solid state drive (SSD), or a volatile storage device such as a random access memory (RAM). The calculation processing unit 12 is configured with a calculation processing device such as a central processing unit (CPU). For example, the storage unit 11 and the calculation processing unit 12 are configured as part or all of a personal computer or server computer for controlling the power supply facility S. The storage unit 11 may be configured with multiple storage devices, for example, a combination of non-volatile storage devices and volatile storage devices. The storage unit 11 may also be configured as part of a server or the like located away from the calculation processing unit 12, and exchange information with the calculation processing unit 12 via a network such as the Internet.

[0022] The memory unit 11 stores power supply facility information, power consumption facility information, and predicted tightness information. For example, the memory unit 11 acquires and stores this information by receiving it via a network such as the Internet or by inputting it by an operator. The power supply facility information is information related to the amount of power consumed and the amount of power generated by a power supply facility S. The power consumption facility information is information related to the amount of power consumed and the amount of power generated by a power consumption facility D. The power supply facility information and the power consumption facility information may be information indicating the actual past amount of power consumed at each facility S, D, or may be information indicating a prediction of future power amount. The predicted tightness information is information indicating a predicted tightness, which is the amount of supply surplus relative to demand in the commercial power system P, predicted for a future unit time. The predicted tightness is, for example, the wide-area reserve margin (a value obtained by subtracting the total demand from the total supply of the commercial power system P and dividing the difference by the total demand) published by the Organization for Cross-regional Coordination of Transmission Operators (OCCTO), which is an indicator used as the basis for calculating imbalance charges. Note that the predicted tightness does not necessarily need to be incorporated into the imbalance charge calculation formula, and it may be an indicator that is correlated with the imbalance charge.

[0023] The calculation processing unit 12 calculates the amount of power to be self-consigned in a future unit time (hereinafter also referred to as "self-consignment amount") based on the power supply facility information, power consumption facility information, and predicted tightness information (details will be described later). The amount of power to be self-consigned calculated by the calculation processing unit 12 is output to the outside as output information. For example, the output information may be displayed as text or an image on a display device to be communicated to an operator, or may be transmitted to an Organization for Cross-regional Coordination of Transmission Operators or the like and declared by business operator B1 as the amount of power to be self-consigned.

[0024] Next, a method for calculating the self-consignment amount by the calculation processing unit 12 will be described with reference to the drawings. Fig. 3 is a diagram showing an example of a method for calculating the self-consignment amount by the calculation processing unit 12. Note that Fig. 3 shows a time series in which time progresses from left to right in the figure.

[0025] First, the calculation processing unit 12 calculates the self-consignment amount for each unit time included in a specific target period (for example, the period from 8:00 to 24:00 on the day after the calculation date). However, here, the calculation processing unit 12 calculates the self-consignment amount for plan submission, which is a procedure required for self-consignment. Plan submission is a notification of the self-consignment amount for each unit time included in the target period in advance, and needs to be made sufficiently before the target period (for example, a next-day plan submitted by 12:00 on the day before the target period). Furthermore, plan submission is required not only for self-consignment but also when selling electricity to the commercial power system P. Note that the self-consignment amount that has been submitted as a plan can be changed later. For example, the self-consignment amount submitted as a next-day plan can be changed by submitting a current-day plan between 17:00 on the day before the target period and one unit hour.

[0026] For example, the calculation processing unit 12 calculates the amount of power that the power supply facility S can supply (amount of reverse flow) to the commercial power system P based on power supply facility information indicating the past actual amounts of power consumption and power generation at the power supply facility S. Furthermore, the calculation processing unit 12 calculates the amount of power that the power consuming facility D receives from the commercial power system P based on power consuming facility information indicating the past actual amounts of power consumption and power generation at the power consuming facility D. Then, the calculation processing unit 12 may calculate the entire amount of power that the power supply facility S can supply to the commercial power system P (however, if the amount of power that the power supply facility S can supply to the commercial power system P exceeds the amount of power that the power consuming facility D receives from the commercial power system P, up to the amount equal to the amount of power that the power consuming facility D receives from the commercial power system P) as the self-consignment amount, or may calculate the self-consignment amount so that the contracted power is reduced as proposed in JP 2017-163780 A.

[0027] Next, after the plan is submitted, the predicted tightness of each unit time included in the target period is announced, and the predicted tightness information is stored in the memory unit 11. The timing at which the predicted tightness information is stored in the memory unit 11 is after the plan is submitted and before the start of the target period (and further, within the deadline for changing the self-transportation amount submitted as a plan).

[0028] When the predicted tightness included in the target period indicates that the magnitude of the supply surplus relative to the demand of the commercial power system P is equal to or less than a predetermined magnitude, the calculation processing unit 12 calculates the self-consignment amount in the unit time so that it is equal to or less than a predetermined upper limit value, and outputs the result as output information. As a result, the self-consignment amount in the unit time is suppressed to equal to or less than the upper limit value by an operation by an operator who has confirmed the output information, or by sending the output information to the Organization for Cross-regional Coordination of Transmission Operators.

[0029] For example, when the wide-area reserve margin, which is the predicted tightness in a certain unit time, falls below 8%, the calculation processing unit 12 sets the self-transmission amount for that unit time below the upper limit value. Also, for example, the upper limit value is equal to or less than the amount of power that the power supply facility S can reliably supply to the commercial power system P.

[0030] As described above, if the calculation processing unit 12 calculates the self-transport amount in the unit time to be equal to or less than a predetermined upper limit when the predicted tightness included in the target period indicates that the amount of supply surplus relative to the demand of the commercial power system P is equal to or less than a predetermined amount, it is possible to suppress the occurrence of imbalance fees when the supply and demand of the commercial power system P is tight and there is a high possibility that the imbalance fees will become expensive. Therefore, it is possible to suppress the occurrence of expensive imbalance fees.

[0031] The upper limit may be a predetermined positive value, or may be 0. Setting the upper limit to 0 can reliably prevent imbalance charges from occurring.

[0032] Furthermore, if at least one predicted tightness during the target period indicates that the magnitude of the supply surplus relative to the demand of the commercial power system P is equal to or less than a predetermined magnitude, the self-consignment amount may be calculated so as to be equal to or less than an upper limit value for each of a plurality of unit times included in the target period. In this case, even if the self-consignment amount is changed by an operator's operation, for example, the occurrence of imbalance charges can be suppressed while suppressing an increase in labor costs by a simple operation.

[0033] The above-described embodiments are merely examples for carrying out the present invention. The present invention is not limited to the above-described embodiments, and can be practiced by appropriately modifying the above-described embodiments without departing from the spirit of the present invention.

[0034] For example, in the above embodiment, a case has been exemplified in which a self-consignment amount is submitted as a day-ahead plan, a predicted tightness is acquired, and a daily plan is submitted and corrected based on the predicted tightness. However, it is also possible to only submit a self-consignment amount based on the predicted tightness as a daily plan without submitting a day-ahead plan.

[0035] Furthermore, in the above-described embodiment, an example has been given of a case in which the calculation processing unit 12 executes a program stored in the storage unit 11 to realize the operation of the above-described self-consignment amount calculation system 1. Meanwhile, as an embodiment different from the above-described embodiment, the program may be distributed as any computer-readable storage medium (program storage medium), or may be distributed by being transmitted via a wireless or wired communication line.

[0036] The above-described self-consignment amount calculation system can be explained as follows.

[0037] The self-transmission amount calculation system calculates the amount of self-transmission electricity that electricity supplied by a power supply facility operated by a business operator to a commercial power system is lent to an electricity consumption facility operated by the business operator or another business operator belonging to the same business entity as the business operator and that receives and consumes electricity from the commercial power system.The system includes a memory unit that stores predicted tightness information indicating a predicted tightness, which is the magnitude of the supply surplus against demand in the commercial power system predicted for a future unit time, and an arithmetic processing unit that calculates the amount of electricity to be self-transmissioned for a unit time before the arrival of the unit time based on the predicted tightness for the future unit time indicated by the predicted tightness information stored in the memory unit.When the predicted tightness for the future unit time indicates that the surplus is less than a predetermined amount, the arithmetic processing unit calculates the amount of electricity to be self-transmissioned for the unit time to be less than an upper limit value (first configuration). This configuration makes it possible to suppress the imbalance fee when the supply and demand in the commercial power grid is tight and there is a high possibility that the imbalance fee will be high. Therefore, it is possible to suppress the occurrence of high imbalance fees.

[0038] In the first configuration, when the predicted tightness in at least one of the unit times for a target period including a plurality of the unit times indicates that the margin is equal to or less than a predetermined magnitude, the calculation processing unit may calculate the amount of self-consignment electricity in each of the plurality of unit times included in the target period so that the amount of self-consignment electricity is equal to or less than the upper limit (second configuration). According to this configuration, even when the self-consignment amount is changed by an operator's operation, for example, an increase in labor costs can be suppressed and the occurrence of imbalance charges can be suppressed by a simple operation.

[0039] In the first or second configuration, when the predicted tightness in the future unit time indicates that the margin is equal to or less than a predetermined magnitude, the calculation processing unit may calculate the amount of energy to be self-consigned in the unit time to be 0 (third configuration). With this configuration, it is possible to reliably prevent the occurrence of imbalance charges.

[0040] In addition, the program used in the above-mentioned self-transmission amount calculation system is a program that causes a computer to execute a process of calculating the amount of self-transmission electricity that is supplied to a commercial power system by a power supply facility operated by the operator and distributed to an electricity consumption facility operated by the operator or another operator belonging to the same business entity as the operator, which receives electricity from the commercial power system and consumes it, and causes the computer to execute a process of acquiring predicted tightness information that indicates the predicted tightness, which is the amount of supply surplus against demand in the commercial power system predicted for a future unit time, and a process of calculating the amount of electricity to be self-transmitted in that unit time to be less than an upper limit value if the predicted tightness for that future unit time indicated by the predicted tightness information indicates that the surplus is less than a predetermined amount (fourth configuration). [Explanation of symbols]

[0041] 1...self-consignment amount calculation system, 11...storage unit, 12...arithmetic processing unit, S...power supply facility, D...power consumption facility, P...commercial power system, B1, B2...business operator

Claims

1. A self-consignment amount calculation system that calculates the amount of self-consignment electricity that is supplied to a commercial power system by a power supply facility operated by a business operator and is lent to a power consumption facility that is operated by the business operator or another business operator that belongs to the same business entity as the business operator and receives and consumes electricity from the commercial power system, a storage unit that stores predicted tightness information indicating a predicted tightness, which is the magnitude of a supply surplus relative to demand in the commercial power system predicted for a future unit time; a calculation processing unit that calculates, based on the predicted tightness of the future unit time indicated by the predicted tightness information stored in the storage unit, an amount of power to be self-consigned at the unit time before the unit time arrives, When the predicted tightness in the future unit time indicates that the margin is equal to or less than a predetermined size, the calculation processing unit calculates the amount of power to be self-transmitted in the unit time to be equal to or less than an upper limit value. A self-transmission amount calculation system.

2. The calculation processing unit calculates, for a target period including a plurality of the unit times, when the predicted tightness in at least one of the unit times indicates that the surplus is less than a predetermined magnitude, the amount of electricity to be self-transmitted in each of the plurality of unit times included in the target period so that it is less than or equal to the upper limit value. The self-transmission amount calculation system according to claim 1.

3. The calculation processing unit calculates the amount of electricity to be self-transmitted in the unit time to be 0 when the predicted tightness in the future unit time indicates that the margin is less than a predetermined size. The self-transmission amount calculation system according to claim 1 or 2.

4. A program that causes a computer to execute a process of calculating the amount of self-consignment electricity that is supplied to a commercial power grid by a power supply facility operated by a business operator and distributed to a power consumption facility operated by the business operator or another business operator that belongs to the same business entity as the business operator and receives and consumes electricity from the commercial power grid, A process of acquiring predicted tightness information indicating a predicted tightness, which is the magnitude of a supply surplus relative to demand in the commercial power system predicted for a future unit time; When the predicted tightness of the future unit time indicated by the predicted tightness information indicates that the margin is equal to or less than a predetermined size, a process of calculating the amount of power to be self-transmitted in the unit time so that it is equal to or less than an upper limit value; A program that causes the computer to execute the above.

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