JP2004040956A - Power supply management method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To implement a technology wherein in power supply to a consumer group comprising a plurality of consumers, the "same time, same amount" rule is accomplished with ease and efficiency without a power producer's adjusting the amount of power supply to a generator set for adjustment based on fluctuation in the amount of power received by each consumer. <P>SOLUTION: The power supply management method is to be carried out for a consumer group. Some members of the group are specific consumers who are provided with a power supply unit and adjust the output of the power supply unit to receive power in a target amount. The power supply management method comprises step 144 at which excess or deficiency of an estimated amount of power received by each consumer relative to a planned amount of power supplied is totaled, and steps 131 and 132 at which the target amounts of power received by the specific consumers are corrected based on the result of totalization carried out at Step 144. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a power supply management method that is executed for a group of customers including a plurality of consumers who receive power supply from a power generation company.
[0002]
[Prior art]
With the amendment of the Electricity Business Law, partial liberalization of the electric power market has started, and anyone can enter the electric power business. That is, the power generation company participates in a bid or the like performed by a power company (general power company) and sells the generated power to the power company as a wholesale power company, or liberalizes as a specific-scale power company. It is now possible to freely select whether to carry out retail consignment to a target large-scale customer (special-scale customer: a customer who receives power from a 20 KV extra-high-voltage transmission line with a usage scale of 2,000 KW or more in principle).
In the future, the electricity market will be completely liberalized, and in addition to the above-mentioned specific-scale electric utilities and wholesalers, a plurality of small-scale distributed generators installed in homes and buildings will be consolidated. It is considered that a power market can be newly entered by an intermediary company or the like that supplies power, and furthermore, the range of customers subject to liberalization is expanded, and the power market for small-scale customers is considered to be open.
[0003]
In the liberalization of the electric power market as described above, the transmission line network will continue to be operated by the electric power companies in a centralized manner.
Therefore, since the power generation company transfers the generated power to the customer using the existing transmission line network of the electric power company, the power generation company follows the same rule of simultaneous amount from the viewpoint of securing the system stability of the transmission line network. There is a need.
Then, an electric power company such as the above-mentioned power generation company newly entering the electric power market is required to efficiently achieve the same amount of regulations at the same time in order to operate the electric power business.
[0004]
In addition, the rule of the same amount at the same time means that the amount of power received by the customer from the transmission line network and the amount of power supplied to the transmission line network by the power producer must match within a specified period. Specifically, when the excess ratio of the power supply amount to the power reception amount is 3% or more within the specified period of 30 minutes, for example, the power company provides the excess power for free. If the shortage ratio of the power supply amount to the power reception amount is 3% or more, the shortage power is purchased from, for example, a power company at a relatively high fee.
[0005]
As a general method for achieving the above-mentioned rule of the same amount, as a power generation company, for example, in addition to the pattern power generation equipment that is operated as planned, the adjustment power generation equipment capable of adjusting the power generation output is provided. A power supply management system that manages power supply to a group of customers including a plurality of consumers, collects the amount of power received by the customer via a communication network, and collects the amount of received power and, in advance, There is a method of adjusting the power generation output of the adjustment power generation equipment based on the difference from the planned power supply amount.
However, in such a method, it is necessary to adjust the power output of the power generation equipment for adjustment on the power generation company side in accordance with fluctuations in the amount of power received by the customer, and the power generation efficiency of the power generation equipment for adjustment is reduced and the power generation cost is reduced. May be bulky.
[0006]
Therefore, Japanese Patent Application Laid-Open No. 2001-327081 discloses an electric power demand control system capable of simultaneously achieving the same amount of regulation while omitting power generation output adjustment of the power generation equipment for adjustment on the power generation company side. I have. Such a power demand control system adjusts the power generation output of the power supply device on the customer side so as to compensate for excess or deficiency of the received power amount with respect to the planned power supply amount in the power transfer to the customer equipped with the power supply device. It is configured to maintain the amount of power received by the house at the planned amount of power supply. Then, by using such a power demand control system, the power generation company does not need to adjust the power supply amount to the customer so as to deviate from the planned power supply amount.
[0007]
[Problems to be solved by the invention]
However, in order for a power generator that supplies power to a plurality of consumers to achieve the same amount of regulation at the same time using the conventional power demand control system as described above, a plurality of consumers to which power is supplied are required. All must be consumers who have a power supply device and adjust the power generation output of the power supply device to receive the same amount of power as the planned power supply.
[0008]
That is, at least one of the plurality of consumers to which power is supplied does not have a power supply device, and the amount of received power may fluctuate beyond the planned power supply amount (hereinafter, unadjusted demand). In this case, the power generation company installs a power generation facility for adjustment, and based on the amount of power received by the customer collected via the communication network, generates a power output of the power generation facility for adjustment. Need to adjust.
[0009]
Accordingly, the present invention has been made in view of the above circumstances, and in the case of power supply to a group of customers including a plurality of customers, the power generation company has a power generation facility for adjustment based on fluctuations in the amount of power received by each customer. It is an object of the present invention to realize a technique capable of easily and efficiently achieving a rule of the same amount at the same time without a large adjustment of a power supply amount.
[0010]
[Means for Solving the Problems]
The first characteristic configuration of the power supply management method according to the present invention for achieving this object is, as described in claim 1 in the claims section, from a plurality of consumers receiving power supply from a power generation company. A power supply management method executed for a group of consumers, wherein a part of the customers of the group of consumers includes a power supply device and adjusts the output of the power supply device to achieve a target from the power generation company. A specific customer who receives the power of the received power, an excess / deficiency amount summarizing step of summing up an excess / deficiency amount of the predicted power receiving amount with respect to the planned power supply amount of each customer, and And a target power receiving amount correcting step of correcting the target power receiving amount of the specific customer.
[0011]
In other words, according to the first characteristic configuration of the power supply management method according to the present invention, the excess / deficiency amount of the estimated received power amount with respect to the planned power supply amount of each customer is aggregated by the excess / deficiency amount aggregation step, and the excess / deficiency amount is calculated. The total amount of excess or deficiency, which is the sum of the amounts, is obtained, and the target power receiving amount of the specific customer can be corrected so as to offset the total excess or deficiency by the target power receiving amount correcting step.
[0012]
Then, by adjusting the output of the power supply device such as an in-house power generator or a battery device, the amount of power received from the transmission line network is maintained at the target amount of power received. By executing the above-mentioned excess / deficiency amount totaling step and the above-mentioned target received-power correcting step by a computer or the like configured to be able to communicate via a communication network between the specified customers, the received power is supplied to the specified customers other than the specified customers. The total planned power supply amount of the entire customer group including the customers who may fluctuate beyond the amount (hereinafter referred to as unadjusted customers) and the total received power amount of the entire customer group are, for example, 30 minutes. The so-called simultaneous rule of the same amount to be matched within a predetermined period can be easily achieved.
[0013]
Therefore, according to the power supply management method according to the present invention, in the power supply to a group of customers including a plurality of customers, the power generation company determines the amount of power supplied to the adjusting power generation equipment based on the fluctuation in the amount of power received by each of the customers. The same amount of rules can be achieved simply and efficiently without the need for significant adjustment of the power supply.For example, the power generation company can change the power generation equipment to generate the power of the planned power supply planned in advance. It is possible to drive efficiently.
[0014]
Further, the power supply management method according to the present invention, even when a part of the customer group of the power supply destination is the non-adjusted customer, does not require significant adjustment of the power supply amount on the power generation side. Since the same amount of rules can be achieved at the same time, it is possible to prevent an increase in power generation cost due to the adjustment of the power supply amount and supply inexpensive power. Further, the customer having the power device can receive the price for adjusting the output of the power device from the power generation company or other non-adjustment customers.
[0015]
In addition, the power supply of the specific customer is output-adjusted so as to compensate for the fluctuation of the received power with respect to the planned power supply of the other non-adjusted customers. Thus, the same effect as in the case where power is exchanged can be obtained.
[0016]
According to a second feature configuration of the power supply management method according to the present invention, as described in claim 2 of the claims, in addition to the first feature configuration, the actual amount of received power of each of the customers is obtained. And a predicted power receiving amount calculating step of calculating a predicted power receiving amount of each customer from the obtained actual power receiving amounts.
[0017]
That is, according to the second characteristic configuration, in the actual power receiving amount obtaining step, the past actual power receiving amount of each customer measured by a measuring device provided in each customer is obtained via a communication network or the like. Then, in the predicted power receiving amount calculation step, the predicted power receiving amount of each customer can be calculated from the past actual power receiving amount of each customer, and the predicted power receiving amount of each customer calculated in this manner is used. Thus, the excess or deficiency of each customer can be totaled.
[0018]
According to a third feature of the power supply management method according to the present invention, in addition to the first to third features, the operating state information of each of the power supply devices is provided as described in claim 3 of the claims. And the target power receiving amount correcting step satisfies the constraint condition set based on the operating status information of each of the power supply devices, wherein the target power receiving amount correcting step satisfies the target power receiving amount of each of the specific customers. It is a point that it is a step to correct as follows.
[0019]
That is, according to the third characteristic configuration, in the operation state information acquisition step, the operation state information of each power supply device provided in each of the specific customers is acquired via a communication network or the like, and the target power reception amount is acquired. In the correction step, based on the operating state information, the constraint condition is set, and in accordance with the set constraint condition, the target power reception amount of each of the specific customers is corrected, so that the target power reception amount is changed to each of the specific customers. Of the power supply device of the present invention.
[0020]
According to a fourth feature configuration of the power supply management method according to the present invention, as described in claim 4 of the claims, in addition to the third feature configuration, the operating state information includes the This is the information on the allowable output change amount.
[0021]
That is, according to the fourth characteristic configuration, as the operation state information, by using the information on the allowable output change amount that is allowed to be changed with respect to the current output of each power supply device, for each specific customer, The corrected target power reception amount can be set to an appropriate value so that the output of the power supply device does not deviate from the power generation capacity or the like.
[0022]
As described in claim 5 in the column of claims, a computer constituting a power supply system for managing power supply to a customer group consisting of a plurality of consumers is provided in any one of claims 1 to 4. According to a computer program comprising a program for executing each of the steps of the power supply management method described in the section, the computer program is installed in a predetermined computer, whereby the first to fourth characteristic configurations are provided. Can be executed on the computer.
[0023]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows that a power generator 3 distributes the generated power through a transmission line network 7 operated and managed by a general power company 5 in order to retail the generated power to a group of customers including a plurality of customers 10 and 20. FIG. 1 is a schematic configuration diagram showing a state of so-called power consignment for supplying power to respective customers 10 and 20.
In order to perform such power transmission, the total amount of power received by the entire group of consumers from the transmission line network 7 and the total amount of power supplied by the power generation company 3 to the entire group of consumers are supplied. And the same amount of rules that must be matched within a prescribed period such as 30 minutes.
In the present embodiment, the power supply management system 1 (hereinafter, abbreviated as the present system 1) for monitoring the power demand of each customer 10, 20 can efficiently achieve the same amount of rules at the same time. it can. Hereinafter, the detailed configuration of the present system 1 will be described.
[0024]
The power generation company 3 supplies power to a customer group including one or a plurality of specific customers 10 and one or a plurality of non-adjustment customers 20 described below.
[0025]
The specific customer 10 is a customer having a load 11 that consumes power, a power meter 12 that measures the amount of power received from the transmission line network 7, and a power generation device 16 (an example of a power supply device). In addition, such a power generation device 16 includes a gas turbine or a gas engine power generation facility, a fuel cell, and the like. Such a power generation facility is a cogeneration facility that extracts heat as well as electricity to generate hot water and the like. It can be.
[0026]
A control device 14 for controlling the power generation device 16 is provided on the specific customer 10 side. The control device 14 adjusts the output of the power generation device 16 while measuring the amount of power received by the power meter 12, and receives the amount of power received at regular intervals from the system 1 via the communication network 8 such as the Internet network. It is configured to maintain the target received power amount for each prescribed period.
[0027]
At the time when the specified period starts, the control device 14 sets the target received power amount to a planned power supply amount described later for the specific customer 10 in advance. The power reception amount is configured to be corrected to the target power reception amount received from the present system 1 via the communication network 8.
The control device 16 uses the power meter 12 to measure the actual received power amount for each fixed period, such as 5 minutes, which is shorter than the specified period, and then uses the measured actual received power amount for each fixed period via the communication network 8 to It is configured to transmit to the system 1.
[0028]
On the other hand, the unadjusted customer 20 has a load 21 that consumes power, and a power meter 22 that measures the amount of power received from the transmission line network 7. Is a consumer who fluctuates due to
On the non-adjusting customer 20 side, the actual actual received power amount for each of the above-mentioned fixed periods is measured by the power meter 22, and the measured actual received power amount for each of the fixed periods is transmitted to the system 1 via the communication network 8. A communication device 24 for transmitting is provided.
[0029]
The present system 1 is configured by a computer system capable of communicating with the power generation company 3 and the like via a communication network 8, and executes a predetermined computer program using hardware resources of the computer system. Thereby, it is configured to function as each unit that executes each step included in the power supply management method described later. In addition, the computer program according to the present invention is stored in a recording device that can be accessed by a computer that configures the system 1 in hardware via a computer-readable recording medium such as a CD-ROM or a data transmission medium such as the Internet. It is installed and put to practical use.
[0030]
In addition, the power supply management method executed by the present system 1 uses the predetermined information received from the power generation company 3 and each of the customers 10 and 20 to set the target of each of the specific customers 10 for each specified period. The power reception amount is corrected, and the corrected target power reception amount is transmitted to the control device 14 of each specific customer 10. Hereinafter, the power supply management method will be described with reference to the flowchart shown in FIG. .
[0031]
When a specified period such as 30 minutes is started, the system 1 communicates with the power generation company 3 or each of the customers 10 and 20 to be set for each specified period such as 30 minutes. The planned power supply amount of each of the consumers 10 and 20 is acquired (step 101).
The planned power supply amount is a power supply amount for each specified period preset by the power generation company 3 for each of the customers 10 and 20, and the power transmission capacity of the power generation facility of the power generation company 3 and the power receiving characteristics of each of the customers 10 and 20. It is set in consideration of the above.
In addition, the total amount of power supplied by the power generator 3 to the transmission line network 7 for the entire customer group for each specified period by the power generator 3 is equal to the planned power supply of each of the customers 10 and 20 for each specified period. The power generation equipment will be operated so that the total planned power supply amount is the same as the total amount.
[0032]
On the other hand, the present system 1 repeatedly executes the following steps 111, 112, 113, 121, 122, 131, and 132 at regular intervals such as 5 minutes within the specified period.
That is, in step 111, the present system 1 performs communication between the control device 14 of the specific customer 10 and the communication device 24 of the non-adjusted customer 20, and the actual And an actual power receiving amount acquisition step of obtaining the actual power receiving amount of the target. Further, in step 112, the received power amount (predicted received power amount) of each customer 10 within the specified ongoing period is calculated from the actual received power amounts of the respective customers 10 and 20 for each fixed period thus acquired. A predicted power receiving amount calculation step is executed.
Note that the predicted power reception amount of each customer within the specified period can be predicted using a known power reception amount prediction method. The sum of the actual received power amount of the period and the predicted received power amount of each fixed period calculated from the actual received power amount can be set as the predicted received power amount.
[0033]
Next, in step 113, the system 1 determines whether the estimated amount of received power in the specified period calculated in step 112 with respect to the planned power supply amount in the specified period acquired in step 101 of each of the customers 10 and 20 in excess or deficiency. Is calculated, and the excess and deficiency amounts of the customers 10 and 20 are totaled, and the total predicted received power amount (each demand) with respect to the total planned power supply amount of the entire customer group (the total of the planned power supply amounts of the customers 10 and 20) is calculated. The total excess / deficiency, which is the difference between the estimated power reception amounts of the houses 10 and 20, is calculated.
Note that the step of summing up the excess or deficiency of the predicted power reception amount with respect to the planned power supply amount of each customer 10, 20 as in the above step 113 is referred to as an excess or deficiency amount summation step.
[0034]
On the other hand, in step 121, the present system 1 executes an operation state information acquisition step of acquiring operation state information of each power generator 16 from the control device 10 of each specific customer 10 via the communication network 8. The operation state information is information on the allowable power generation output change amount of each power generation device 16, and specifically, the actual power generation amount of each power generation device 16 per fixed period, and the power generation of each power generation device 16 per certain period. Information on the upper and lower limits of quantity.
Further, in step 122, the system 1 recognizes, from the operation state information, an allowable power generation output change amount that is allowed to change the current power generation output of each power generation device 16, that is, a so-called power generation reserve.
[0035]
Then, in step 113, the total excess / deficiency of the entire customer group is calculated, and in step 122, the system 1 that has recognized the surplus power generation capacity of each power generation device 16, calculates in step 131 by the end of the specified period in step 113 above. The change amount of the target power reception amount of each specific customer 10 so that the total excess / deficiency amount becomes 0 and the constraint condition that is within the range of the power generation reserve of each power generation device 16 recognized in step 122 is satisfied. To determine. Then, in step 132, the target power reception amount corrected by adding or subtracting the determined change amount is transmitted to the control device 14 of each specific customer 10 via the communication network 8, thereby controlling each specific customer 10. The target power receiving amount correction command processing is performed on the device 14.
In addition, the step of correcting the target power reception amount of the specific customer 10 based on the total excess / deficiency amount as a result of the totalization of the excess / deficiency amount as in the steps 131 and 132 is referred to as a target power reception amount correction step.
[0036]
Further, in step 121, the system 1 acquires information on the allowable power generation output change rate, the power generation cost, and the like of the power generation device 16 in addition to the operation state information of each power generation device 16, and transmits the obtained information to the above-described information. This can be used to determine the change amount of the target power reception amount of each specific customer 10 in step 131. For example, the present system 1 corrects the target power reception amount of each specific customer within a feasible range in consideration of the allowable power generation output change amount of the power generation device 16 and the allowable power generation output change rate. The target amount of received power of each specific customer can be made more suitable for each power generator 16.
In addition, the present system 1 assigns priorities to the power generators 16 in ascending order of power generation cost, and preferentially increases the target power reception amount of the specific customer 10 having a higher priority. By correcting the target power reception amount of the specific customer 10, the power generation cost of the entire customer group can be optimized.
[0037]
As described above, by correcting the target power reception amount of the specific customer 10 by the present system 1, even if the predicted power reception amount of the non-adjusted customer 20 within the specified period differs from the planned power supply amount, At the end, the total excess or deficiency becomes a value extremely close to zero. Therefore, even if the power generation company operates the power generation equipment efficiently so as to supply a predetermined fixed total planned power supply amount to the power transmission line network 7, the same amount rule is applied to the specific customer 10. This can be achieved by a simple method of adjusting the target power reception amount.
[0038]
[Another embodiment]
Next, another embodiment of the present invention will be described.
<1> In the above-described embodiment, the specific customer is provided with the power generation device 16 as the power supply device, and adjusting the output of the power generation device 16 so that the power reception amount in each specified period is set as the target power reception amount. Separately, a power supply device is provided with a battery device capable of extracting the stored power, and the amount of power stored and discharged in the battery device is adjusted so that the amount of power received every specified period is set as the target amount of power received. May be used as a specific customer.
That is, when the specific customer 10 is a customer having a battery device, when the target power reception amount of the specific customer 10 is larger than the power demand amount of the load 11, the difference power is supplied to the battery device. When the power is stored and the target power reception amount is smaller than the power demand amount, the actual power reception amount of the specific customer 10 can be set as the target power reception amount by supplementing the difference power by discharging from the battery device.
[0039]
<2> In the above embodiment, as shown in FIG. 2, the system 1 obtains the actual actual power reception amount of each of the customers 10 and 20 for each predetermined period (step 111), and furthermore, as shown in FIG. The predicted power receiving amount of each customer 10 within the currently-determined specified period is calculated from the actual power receiving amounts of the customers 10 and 20 obtained at regular intervals, and the predicted power receiving amount is calculated individually in this way. Instead of calculating the predicted received power for each group classified according to the characteristics of the consumer such as the maximum received power, the received power pattern, the type of power load equipment, and the received voltage, or the total predicted received power of the entire customer group, I do not care.
[0040]
<3> In the above embodiment, in order to calculate the total excess or deficiency of the entire customer group, the predicted power reception amount of each customer is calculated, the predicted power reception amount is subtracted from the planned power supply amount, and each customer's estimated power reception amount is calculated. The surplus and deficiency amounts were calculated and the surplus and deficiency amounts were integrated. Separately, the total planned power supply amount of the entire customer group, which is the sum of the planned power supply amounts of the respective consumers, was acquired in step 101, and the total plan was obtained. The total amount of excess or deficiency of the entire customer group may be calculated by subtracting the predicted power reception amount of the entire customer group, which is the sum of the predicted power reception amounts of the customers, from the power supply amount.
[0041]
<4> In the above embodiment, as shown in FIG. 1, the present system 1 is installed at a location other than the customers 10 and 20 and the power generation company 3 and communicates with each other via the communication network 8. However, some or all of the functions of the present system 1 may be installed in the customers 10 and 20 or the power generation company 3.
[0042]
<5> In the above embodiment, the communication device 24 of the unadjusted customer 20 monitors the amount of power received by the unadjusted customer 20, and determines that the amount of unadjusted demand The notification may be generated to the house 20 and the system 1.
Further, in the case where a notification is issued when the amount of received power of the unadjusted customer 20 exceeds the planned amount of received power, the system 1 prepares for correction of the target amount of received power of the specific customer 10 when receiving the above-mentioned notification. Therefore, the power generation capacity of the power supply device 16 of the specific customer 10 can be confirmed.
[0043]
<6> In the above embodiment, the change amount of the target power reception amount of each specific customer 10 is determined on the condition that the total excess or deficiency amount is 0. In the case where the power generation capacity of the device 16 is not sufficient and the total excess / deficiency cannot be set to 0 only by correcting the target power reception amount of the specific customer 10, the above-mentioned total excess / deficiency becomes 0 so that the total excess / deficiency becomes 0. In addition to the target received power, the planned power supply may be modified by adjusting the power output of the power generation equipment for adjustment on the power generation company side.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram showing a state of power transfer. FIG. 2 is a flowchart showing a method of correcting a target power reception amount for each specific demand.
1: Power supply management system (this system)
3: Power generation company 5: General electricity company 7: Transmission line network 8: Communication network 10: Specific customer (customer)
11: load 12: power meter 14: control device 16: power generation device (power supply device)
20: Unadjusted customer (consumer)
21: Load 22: Power meter 24: Communication device

Claims (5)

A power supply management method executed for a group of customers including a plurality of customers receiving power supply from a power generation company,
Part of the customer group is a specific customer who receives a power of a target amount of power received from the power generation company by providing a power supply device and adjusting the output of the power supply device,
An excess or deficiency amount totalizing step of totaling the excess or deficiency of the predicted received power amount with respect to the planned power supply amount of each customer,
A target power receiving amount correcting step of correcting a target power receiving amount of the specific customer based on a totaling result of the excess / deficiency amount totaling step. An actual power receiving amount obtaining step of obtaining the actual power receiving amount of each customer,
The power supply management method according to claim 1, further comprising: a predicted power receiving amount calculating step of calculating a predicted power receiving amount of each customer from the obtained actual power receiving amounts. Including an operation state information acquisition step of acquiring operation state information of each of the power supply devices,
The target power receiving amount correcting step is a step of correcting the target power receiving amount of each of the specific consumers so as to satisfy a constraint condition set based on operating state information of each of the power supply devices. Item 3. The power supply management method according to item 1 or 2. 4. The power supply management method according to claim 3, wherein the operation state information is information on an allowable output change amount of each of the power supply devices. 5. A computer constituting a power supply system for managing power supply to a customer group consisting of a plurality of consumers is configured to execute the respective steps of the power supply management method according to claim 1. Computer program comprising a program for

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