JP2002010499A - Electric power supply control system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively utilize surplus power produced within a prescribed region by controlling power demand and supply among the some plural consumers of a group which cooperate and regulate within the group as a whole. SOLUTION: Power demand and supply are controlled overall among plural power consumers 3a to 3n within the group G. When regulating the demand and supply here, surplus power in the group G is supplied to the power supplying entrepreneurs 2a to 2n, and the shortage in power is received from the suppliers 2a to 2n to the group. The portion of insufficient power is distributed to the consumers 3a to 3n according to their respective demand, and these are conducted with the power supply control apparatus 6 which is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method for converting electric power supplied from an electric power company such as a power generation business or a power sales business and electric power supplied from a decentralized power source provided to a customer into a distributed power supply. The present invention relates to a power supply control system that distributes power to a plurality of power consumers that are integrated and managed, including a power customer that has a power source, in accordance with each demand, and in particular, power that adjusts power supply and demand between the power consumers. The present invention relates to a power supply control system provided with a supply control device.

[0002]

2. Description of the Related Art Conventionally, as an example of this type of power supply control system, there is a power supply control device described in, for example, Japanese Patent Application Laid-Open No. H11-308771.

[0003] This power supply control device distributes electric power supplied from an electric power company such as a power generation or electric power sales company to a plurality of electric power consumers (hereinafter simply referred to as consumers) in a cooperative manner. When there is a difference between the power consumption of the customer assumed in advance and the actual power consumption, the difference is compensated using the power storage device to supply the power.

[0004]

However, in such a conventional power supply control device, the end user is merely a power consumer, and a micro gas turbine power generation device, a solar power generation device, a wind power generation device, and a fuel cell It is not assumed that consumers have small-scale distributed power sources such as.

[0005] For this reason, in a case where a surplus electric power having a larger amount of power generation than a self-consumption electric power is generated in a customer having a distributed power source, the surplus electric power is generated by the customer. They cannot be sold to electric utilities, which can curb power generation, hold them in expensive and specialized storage, or throw away power. Since this is similar to, for example, discarding fuel for power generation, there is a major problem in that it causes economic loss to consumers and wastes global resources.

[0006] Further, since it is not possible to supply a power supply corresponding to a shortage of the power generation amount of the distributed power supply in a literal time to a customer having the distributed power supply, a power distribution system in the customer is required. Problems such as voltage fluctuations and frequency fluctuations may occur, causing failures in various electric devices, and increasing the instability of the power system.

The present invention has been made in view of such circumstances, and an object of the present invention is to coordinate the power supply and demand between a plurality of customers who are integratedly managed (grouped) throughout the group. It is an object of the present invention to provide a power supply control system in which the surplus power from the distributed power sources in the group can be effectively used by other consumers in the group by adjusting.

[0008]

The invention according to claim 1 is
The electric power supplied from the electric utility and the electric power generated by the distributed power supply provided to the consumer, the plurality of electric power consumers that are integrated and managed, including the electric power consumer equipped with the distributed electric power supply, In the power supply control system that allocates power according to demand, the power supply and demand between the plurality of power consumers managed in a unified manner is comprehensively adjusted, and in the case of the supply and demand adjustment, surplus power is supplied to the power utility. On the other hand, there is provided a power supply control system including a power supply control device that receives a supply of the insufficient power from the electric power supplier and distributes the power according to the demand of each power consumer.

According to the present invention, the power supply and demand between the customers in the group of a plurality of power consumers which are integrated and managed by the power supply control device are adjusted collectively. When there is surplus power in the group, the surplus power is supplied to the electric power company and is not discarded, so that the surplus power is effectively used.

When there is a shortage of power to be supplied to the entire group, the power shortage is collectively received from an electric power company and distributed to each customer according to demand. Therefore, electric power can be stably supplied in real time to each customer in a predetermined area. For this reason, the stability of the power distribution system of each customer can be improved.

In addition, since the power supply and demand between the consumers in the entire group are collectively adjusted by the power supply control device, the electric power company separately contracts with the customers for the power supply and the like, and individually supplies and receives the power. In addition to eliminating the need for adjustment, supply of surplus power on the customer side to electric utilities, i.e., selling power, and accepting supply from the electric power company for power shortages on the consumer side, i.e., power purchase, are summarized. As compared with the case where these power purchases and purchases are made individually for each customer, the power purchase contract or the conclusion procedure is facilitated and the power purchase conditions on the customer side can be made more advantageous. ,
Cost can be reduced.

[0012] In the invention according to claim 2, the power supply control device collectively sells the surplus power of the power consumer to the electric utility, and also sells the power shortage of the power consumer to the electric utility. Power buying and selling equipment purchased from
It is a power supply control system characterized by comprising:

According to the present invention, since the surplus electric power of the customers in the entire group is collectively sold to the electric power company by the electric power trading device, the effective operation of the distributed power supply can be further improved as compared with the case where the surplus electric power is discarded. This makes it possible to improve the economic benefits of consumers and thus to prevent and reduce waste of global resources.

According to a third aspect of the present invention, in the power supply control device, the integrated power consumption of each power consumer per unit time of the whole year and the power generation of each distributed power source per unit time of the whole year The power supply control system according to claim 1 or 2, further comprising a demand supply control device that adjusts power supply and demand by integrally determining power supply and demand based on the amount.

[0015] According to the present invention, the demand and supply control device determines, on the basis of the power consumption per unit time of the whole year on the consumers side in the group and the power generation per unit time of each distributed power source throughout the year. Since the excess or deficiency of the power supply and demand is determined, an appropriate amount of surplus electric power can be sold to the electric power company, and the electric power shortage can be purchased from the electric business. Therefore,
It is possible to improve the efficiency of power trading as the whole power supply control system.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIG.
It will be described based on.

FIG. 1 is a block diagram showing the overall configuration of a power supply control system 1 according to a first embodiment of the present invention. The power supply control system 1 is configured such that a plurality of electric utilities 2a,..., 2n such as a power company supply electric power to a plurality of customers (power consumers) 3a, 3b,. The electric power generated by the small-scale decentralized power supply 4 provided in any of the houses 3a to 3n
A power supply control device 6 is interposed in the middle of the power system 5 that supplies (power sells) to the a to 2n sides.

The customers 3a to 3n include small consumers, such as individuals, with small power consumption to large customers, such as manufacturers, with large power consumption, and among these customers 3a to 3n. May have a small-scale distributed power source 4 for self-consumption or power sale. Examples of the small-scale distributed power supply 4 include a diesel power generator, a micro gas turbine power generator, a fuel cell, a photovoltaic power generator, a wind power generator, a micro hydro power generator, and the like. It is connected to a power supply control device 6 via a wired or wireless customer-side communication system 7 shown by a broken line in the figure so that bidirectional communication is possible. The power supply control device 6 is configured to read information on equal power generation as needed. If necessary, a means for remotely controlling the driving of the distributed power supply 4 using the customer communication system 7 may be provided in the power supply control device 6.

The power supply control device 6 is configured to be capable of bidirectional communication with each of the electric utilities 2a to 2n via a wired or wireless electric utility communication system 8 shown by a broken line in the figure. Information required when purchasing a required amount of power collectively from the businesses 2a to 2n on behalf of the customers 3a to 3n or selling power can be received.

Each of the communication systems 7 and 8 may be the Internet, a dedicated line, or a wireless line using a general telephone line or an ISDN line.

Then, as shown in FIG. 2, the power supply control device 6 controls each of the customers 3a to 3a through the customer communication system 7.
n, a customer communication device 6a communicably connected to each of the consumers 3a to 3n by the customer communication device 6a.
n, the contract power amount collecting device 6c, the demand supply control device 6d, and the power trading device 6 for collecting the contract power amount data from the corresponding contract power amount and registering the collected contract power amount in the contract power table 6b.
e, trading power amount table 6f, and these devices 6a to 6e are connected by a LAN or a communication path (bus) in the device.

Each of the customers 3
a to 3n of data on the amount of power consumption per unit time of the whole year, each of the consumers 3a to 3n having the distributed power source 4 and the data of the amount of power generation per unit time of the whole year, and the distributed power source 4
Customers 3a to 3n in a group G of a plurality of power consumers that are integrated and managed regardless of whether or not
Data and electricity per unit time of the whole year are purchased from electricity providers 2a to 2n (power purchase).
The amount of power to be sold, any one of the power providers 2a to 2n of the purchaser, and the power to sell (sell) the surplus power of the entire group G to the power providers 2a to 2n. The data of the electric power companies 2a to 2n and the actual power trading data in the past year are recorded.

The customer communication device 6a mainly has the following functions.

(1) Contract power non-reception notification function This is determined in advance when the demand supply control device 6d instructs any of the required customers 3a to 3n whose contract power amount has not been received and the content. It is a function of transmitting a notification for encouraging registration of the contracted electric energy to any of the corresponding customers 3a to 3n in accordance with the specified format.

(2) Supply Power Amount Notifying Function When the supply power amount scheduled by the DA and the HA, which will be described later, is instructed from the demand / supply control device 6d, a format predetermined according to the excess / shortage is used. This is a function of notifying the consumers 3a to 3n of the supplied electric energy.

(3) Supply power limit request function This is because when there is a difference between the contract power and the supply power from the demand / supply controller 6d and the reason why it cannot be adjusted is indicated, This is a function for notifying the customer 3a to 3n of the usage amount to be changed or restricting the usage method according to a predetermined format.

(4) Answer Function This is a system administrator who, when processing various types of information stored in the customer information table, needs to answer each of the customers 3a to 3n. This is a function for directly instructing the contents to the customer communication device 6a from the user and responding to the corresponding customers 3a to 3n.

The contracted power amount collecting device 6c operates at a certain time t ₁ on the day before the actual power supply date to each of the customers 3a to 3n.
At time t ₀ there early predetermined period of time than, consumers 3a
3n, the contract power amount data of the next day is confirmed, and if the data is not received, the demand supply control device 6d
To that effect. The above-mentioned t ₁ and t ₀ vary depending on the power trading market form. For example, when time t ₁ = 18 o'clock, time t ₀ = 17: 00 and the like.

The contracted power amount collecting device 6c stores customer information including requests and questions sent in real time from the customers 3a to 3n using communication means in a customer information table (not shown). Store and notify system administrator. The system manager having received the notification has a function of performing timely processing and, if necessary, notifying the customers 3a to 3n via the customer communication device 6a.

The demand and supply control device 6d has the following real-time control function, DA scheduling function, and HA scheduling function.

[0031] (1) the day before the real-time control functions actual power supply date for example until a predetermined Registration final time t ₀ of the previous day, the contract power amount from the contract power collecting device 6c is indicating that unreceived When the notification is received, the customer communication device 6a is instructed to immediately transmit a warning to the customer.

[0032] from (2) DA (Day-Ahead ) scheduling function actual comes at a certain time _{t 1} of the previous day's power supply date, buying and selling power amount table 6e power contract the amount of each consumer 3a~3n is requesting For the customers 3a to 3n that have acquired and not registered the contract power data, zero is entered as there is no demand on the next day. Registration final time t ₀ is different by the power trading market form, for example here, t 0 ₌ 18
Time. Next, power purchase performance data for a certain period is read from the trading power amount table 6f. The parameters at the time of acquisition are the amount of power to be purchased and the price per unit time.

Here, an optimal power supply schedule is determined so that the objective function of the following equation (1) is minimized.
As an example of the objective function, for example, minimization of the total cost is a typical example. For example, in the case where late-night power is much cheaper than in the daytime and the cost is lower than the purchase in the daytime, the schedule of the power purchase amount that increases the purchase amount in the middle of the night compared to the power demand of the customers 3a to 3n is set. decide.

[0034]

(Equation 1)

After each of the purchase schedules determined in this way is stored in the traded electric energy table 6f, the power purchaser 6e is instructed to purchase electric power. After a response is received from the power trading device 6e, the purchase result is read from the trading power table 6f, and after confirmation, the purchase schedule is notified to the customer communication device 6a and recorded.

[0036] (3) HA (Hour-Ahead ) scheduling function also actual enters the power supply date, the predetermined time _{t 3} destination every predetermined time _{t 2,} the power which each consumer 3a~3n is requesting Is read from the power contract table 6b, and zero is entered for a customer whose contract amount data is not registered, assuming that there is no demand at that time. The time _{t 2} and t
₃ differs depending on the form of the power trading market. For example, if t ₂ = t ₃ = 1 hour, the contracted amount data one hour ahead is read out every hour on the actual power supply day.

Next, it is checked whether or not there is a difference between the power supply amount set the day before and the currently predicted power demand. Even if this difference is recognized, if adjustment is possible among the plurality of customers 3a to 3n in the entire group G, it can be dealt with by communicating the adjustment result to the customer communication device 6a.

If the power demand exceeds the power supply and the power to be supplied to the customers 3a to 3b in the entire group G is insufficient, the objective function including the current power purchase cost is used. Then, a schedule that minimizes the purchase cost is calculated, and the trading power amount table 6f is updated with the calculation result.

When purchasing power, the power trading device 6e
To instruct power purchase. On the other hand, when the adjustment of the power supply and demand is completed, the result is notified to the customer communication device 6a. In the case where the above difference is recognized, if the case where the power demand exceeds the power supply cannot be adjusted, the result is immediately communicated to each of the customers 3a to 3n to optimize the power quality and cost. Each of the consumers 3a to 3a is selected so that the supply and demand of electric power can be balanced.
Adjust the demand for n itself.

On the other hand, when the surplus power is generated because the power consumption of the consumers 3a to 3n in the entire group G falls below the total power generation by the distributed power supply 4, the demand supply control device 6d It is sold to the required electric utilities 2a to 2n via the device 6e. The sale is sold to the electric utilities 2a to 2n at a timing when the profit for sale can be maximized, and information on the sale of electric power, such as the amount of sold electric power and the sale destination, is recorded or updated in the trading electric energy table 6f.

Therefore, according to the power supply control device 1, the power supply control device adjusts the power supply and demand between the customers 3a to 3n in the group G collectively,
Moreover, when there is excess power in this group G at the time of the supply and demand adjustment, the excess power is transferred to the electric power companies 2a to 2n.
The surplus power is used effectively because it is supplied (traded) to and not thrown away.

When there is a shortage of power to be supplied to the entire group G, the power shortages are collectively received and electric power is supplied from the electric power companies 2a to 2n, and the respective consumers 3a to 3n are supplied. In addition, since the power is distributed according to each demand, the power can be stably supplied in real time to the customers 3a to 3n in the group G. For this reason, the stability of the power distribution system of each of the customers 3a to 3n can be improved.

Each of the customers 3a to 3n in the group G
Since the power supply and demand between them are collectively adjusted by the power supply control device 1, the electric power companies 2a to 2n do not need to separately contract with each of the customers 3a to 3n for power supply and the like and to individually adjust supply and demand. In addition, the supply of surplus electric power on the consumers 3a to 3n side to the electric utilities 2a to 2n, that is, the electric power sales 2 and the electric utility 2 for the power shortage on the consumers 3a to 3n side.
Since the supply of power from a to 2n is accepted, that is, the power purchase is performed collectively, the power purchase and sale contract or conclude procedure is easier than in the case where these power trades are performed individually for each of the customers 3a to 3n. In addition, the power purchase conditions on the consumers 3a to 3n side can be made advantageous.

The consumers 3a to 3n of the entire group G
Of the surplus power by the power trading device 6e
Since they are sold together in 2n, the economic profits of the consumers 3a to 3n can be improved as compared with the case where the surplus power is discarded, and the waste of global resources can be reduced without prevention.

Further, the demand / supply control device 6d uses the consumers 3a to 3n in the group G on the basis of the power consumption per unit time of the whole year and the distributed power sources 4 based on the power generation per unit time of the whole year. Therefore, it is possible to determine the excess or deficiency of the entire power supply and demand in the group G, so that an appropriate amount of surplus electric power can be sold to the electric power company while the appropriate amount of the electric power shortage can be purchased from the electric power company. Therefore, it is possible to improve the efficiency of power trading as the whole power supply control system.

[0046]

As described above, according to the present invention, the power supply and demand between the customers in a group of a plurality of power consumers managed in a unified manner are adjusted collectively, and when the supply and demand are adjusted. When there is surplus power in this group, the surplus power is supplied to the electric power company and is not discarded, so that the surplus power is effectively used.

When there is a shortage of power to be supplied to the entire group, the power shortage is collectively received from the electric power company and distributed to each customer according to demand. Therefore, electric power can be stably supplied in real time to each customer in a predetermined area. For this reason, the stability of the power distribution system of each customer can be improved.

Further, since the power supply and demand between the customers in the entire group are collectively adjusted by the power supply control device, the electric power company separately contracts with each customer for the power supply and the like, and individually supplies and receives the power. In addition to eliminating the need for adjustment, supply of surplus power on the customer side to electric utilities, i.e., selling power, and accepting supply from the electric power company for power shortages on the consumer side, i.e., power purchase, are summarized. As compared with the case where these power purchases and purchases are made individually for each customer, the power purchase contract or the conclusion procedure is facilitated and the power purchase conditions on the customer side can be made more advantageous. ,
Cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram of an embodiment of a power supply control system according to an embodiment of the present invention.

FIG. 2 is a block diagram mainly showing a configuration of a power supply control device shown in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Power supply control system 2a-2n Electricity company 3a-3n Consumer 4 Small-scale decentralized power supply 5 Power system 6 Power supply control device 6a Customer communication device 6b Contracted power table 6c Contracted power amount collection device 6d Demand supply control device 6e Electricity trading device 6f Electricity trading table G group

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Nobuhiro Tsuchiya 66-2 Horikawa-cho, Saiwai-ku, Kawasaki-shi, Kanagawa Prefecture Toshiba Engineering Corporation (72) Inventor Junichi Miyake 66-2 Horikawa-cho, Saiwai-ku, Kawasaki-shi, Kanagawa Inside Toshiba Engineering Co., Ltd. (72) Kenta Otake, 66-2 Horikawa-cho, Saiwai-ku, Kawasaki-shi, Kanagawa Prefecture Inside (72) Inventor Koichi Kojima 66-2, Horikawa-cho, Sachi-ku, Kawasaki-shi, Kanagawa F-term in Toshiba Engineering Service Corporation (reference) 5G066 HA15 HB02

Claims (3)

[Claims] 1. A plurality of electric powers which are integrated and managed by an electric power supplier including an electric power supplier provided with the above-mentioned distributed electric power supply and an electric power generated by a distributed electric power supply provided to the electric power supplier. In a power supply control system that distributes to customers according to their respective demands, the power supply and demand among the plurality of power consumers that are integrated and managed are collectively adjusted, and the surplus power is adjusted when the supply and demand is adjusted. An electric power supply control device, comprising: a power supply control device that supplies a shortage of electric power to the electric power company and distributes the shortage power according to the demand of each electric power consumer upon receiving the supply from the electric power company. system. 2. The power supply control device according to claim 1, further comprising: selling the surplus power of the electric power consumer to the electric utility in a lump, and purchasing the insufficient power of the electric power consumer from the electric utility in a lump. A power supply control system comprising a trading device. 3. The power supply control device according to claim 1, wherein the power consumption of each power consumer managed in an integrated manner per unit time throughout the year is:
2. A demand / supply control device that adjusts the demand / supply of power by integrally determining the demand / supply of power based on the amount of power generation per unit time of each distributed power source throughout the year. Or the power supply control system according to 2.