KR20020066654A - method and system for power supply broker using communication network and power demand controller - Google Patents

Abstract

PURPOSE: A method and a system for intermediating an electric power sale are provided to buy the electric power at a profitable price by securing a plurality of electric power consumers as members, obtaining electric power demand related information of the consumers through a two-way communication with a load control sensing device, constructing an electric power transaction central control device for managing a load of the consumers, and buying the electric power. CONSTITUTION: A plurality of electric generating businessmen(G1-G5) sells a generated electric power to an electric power transaction market(P). In the market(P), a market manager receives the electric power being supplied in the generating companies through a bid and supplies the electric power to selling businessmen(D1-D3) through a bidding transaction of the selling businessmen(D1-D3). The selling businessmen(D1-D3) supply the electric power bought in the market(P) to each consumer(L1,L2). The selling businessmen(D1-D3) do not perform an electric power selling transaction to each consumer(L1,L2) directly, but perform an electric power selling transaction to an electric power purchase agent(R) having a plurality of electric power consumer groups.

Description

Power sales brokering method and system using communication network and power demand management device {method and system for power supply broker using communication network and power demand controller}

The present invention relates to a power sales intermediation method and system using a communication network and a power demand management device, and more particularly, power demand by bidirectional communication through a load control monitoring device installed in each power customer by securing a plurality of power consumers as members. The present invention relates to a method of acquiring information, directly managing and controlling a load, and purchasing power through a power trading market (power pool) or a power seller.

Recently, the necessity of introducing market competition principle is increasing to eliminate the inefficiency caused by public companies, and the restructuring of the electric power industry is being promoted by promoting the consolidation of electric power business through the use of private capital.

The power industry can be broadly divided into generation, transmission, distribution, supply and system operation. Here, the transmission and distribution sector is a natural monopoly segment classified as a line business, and the system operation is also an exclusive segment with a central control function. Power generation and sales are the only sectors that can compete by participating in multiple markets. Therefore, the content of the restructuring of the power industry can be said to introduce the principle of market competition in the power generation and sales sectors.

Generally, the government's regulation (price and entry regulation) is applied to the area where natural monopoly is recognized, and the sector where the principle of market competition is applied excludes the government's direct involvement. Now, the restructuring of the power industry began with the division of power generation companies, and in the form of a pool system as shown in FIG. 1, that is, a price bidding form between individual power generation companies and local distribution companies as a power trading market system. Will have. Therefore, the electricity bill is priced at a price determined by two-way bidding between the power generation company and the local power distribution company (or large-scale customers), and the consumer purchases electric power through the power distribution company.

Here, the power structure reorganization process will be described in detail.

The structure of electric power business is divided into four types according to the degree of separation of functions: vertical integration, power generation competition, wholesale competition and retail competition (complete competition). Finally, retail competition (complete competition) The power structure of the type is ideal.

The vertically integrated type is a form in which one power company includes all power generation, transmission, distribution, sales, and system operation functions as shown in FIG. 2. Consumers do not have the freedom to choose power purchases, and their access to power generation and sales is legally restricted.

In this case, the electric power company has a supply obligation to construct power generation facilities to satisfy electric power demand instead of the government monopolization of the business monopoly, and the rate is regulated by the government.

3 is a power competitive structure of power generation competition.

Referring to FIG. 3, a power generation competitive power transaction structure is a form in which there is a competition in the power generation sector, and there are a number of power generation companies, and a single purchasing power company in charge of transmission, distribution, sales, and grid operation has their power. Buy all of them and sell them to customers.

There are two types of power generators that sell electricity to a power company that is a single purchaser. There are two types of sales: bid sales through a power purchase agreement (PPA) or bidding through a power transaction market. Here, the transmission and distribution are operated by a single power company, and the power purchased by the single power company from the power trading market is supplied to the consumer. In addition, the large-scale consumer may purchase power through a direct transaction with the power generation company.

4 is a wholesale competition power trading structure.

Referring to FIG. 4, a wholesale competition type power transaction refers to a form in which a power wholesale transaction is performed between a plurality of power generation companies and a plurality of distribution companies (which may also be a sales business). Transmission operators are responsible for power pools and grid operations, which are electricity trading markets for power transactions between them in independent locations. From this time, there is a power pool operating system for operating a power pool. In some cases, it may be divided into a network management company, a system operator, and a market operator. In Korea, it is divided into power transmission companies and power exchanges (system operators and market managers).

In such wholesale competitions, the allowance for large-scale consumers to directly deal with the generators is greater than that of the generators, but general consumers still have to buy electricity from their local distribution companies (which can also be sales). Captive Customer). In other words, there is no separate seller, and the distribution company monopolizes electricity sales. Here, the power transaction bidding market for electricity trade between power generation companies and distribution companies is operated, and the type of market receives bids and power generation schedules from the power generation companies daily (to prepare supply curves), and at the same time, the expected demand information according to the price from the distribution companies. The demand curve is drawn up to form the market price for each day.

The biggest change in the electricity industry structure at this time was to completely separate multiple generators and distribution companies (also known as sales) from a single power company (vertical integration type) integrating power generation, transmission, distribution and sales. The introduction of the Two Way Bidding Pool will allow not only existing generators but also distribution companies (both sales and business) to participate in competitive market transactions. In other words, compared to the initial simple power generation competition system, in addition to the power generation competition, the distribution company (sales business) is given a supplier choice, and thus, it is possible to purchase energy from the power generation companies competing for its consumers.

Here, the power trading bidding market (power pool) forms a power trading price, performs only a market management function to make a transaction, and does not buy or sell power. The fairness of the use of the grid is guaranteed, allowing anyone to use the grid under fixed costs and rules. This is the full power trading market (power pool) operating system.

5 is a power competition structure of the retail competition (complete competition) type.

Referring to FIG. 5, the retail competition (complete competition) type is a competition system in which the full market competition principle is applied, and it is a structure that gives power purchasing options to general consumers as well as large consumers. The retail competition (complete competition) type power trading structure is the final stage of the restructuring, and the local monopoly of the distribution company disappears. As a result, a dramatic change in the power purchase method between the power sector and consumers is expected. That is, in the wholesale competition type, the distribution company owned the distribution business and the supply business, but the retail competition (complete competition) type separates the two functions. Of course, distribution providers also have a sales function, but they are not proprietary but become one of many sellers. Therefore, there is a power sales company that has only pure sales functions that do not have a distribution function that acts as a consumer power purchase or assists the function of a power pool operator.

In such a retail-competitive power structure, power consumers (consumers) either trade directly with the generators (in the case of large-scale power consumers), or purchase power through the distributors to supply power from distribution providers with distribution networks. Receive. At this time, each customer should be equipped with a time-based metering device, and the fee for using the power transmission network and the distribution network remaining exclusively is regulated by the government.

As discussed above, if the power industry moves toward a complete competition system, the regional monopoly of local distribution companies will disappear, and eventually a full-sales competition system will emerge, in which electricity distributors will appear or local distributors will become sellers. Therefore, the consumer can enter into a contract from a power seller or a distribution company (also known as a sales business) on a more favorable condition in a full sales competition.

However, such a full-sell competition must rely on individual contracts with the sellers who sell electricity to each customer, in which case the sellers must sell each customer in contact with each other. Even if they have a sales contract with them, it is difficult to accurately grasp the power demands of their customers, and therefore, it is difficult to predict the power demand. In addition, even if a power seller makes a contract for power sales by securing a large number of electric power users, it is difficult to grasp real-time electric power demand because the electric power customers and online communication networks are not established. Electric power customers and groups formed by electricity sellers and groups are not able to predict the hourly and daily power demands of consumers required to cope with the demand, and also cannot control the loads of power consumers necessary for power trade under favorable conditions. There is a problem that the process of entering into this specific power purchase contract is not made smoothly.

The present invention has been made to solve the problems of electricity trade in the power industry structure as described above, by securing a plurality of power consumers as a member, the power demand related information of the customer by bidirectional communication with the load control monitoring device installed in each power customer By directly acquiring the power supply and managing the load of customers directly, and acting as a power purchaser on behalf of the electric power seller in the electric power seller or the electric power trading market (power pool) through the electric power trading central control device. By providing various information on the power demand of customers and the information on the power market, it provides a power sales intermediation method and system using a communication network and a power demand management device to purchase electricity at a price favorable to the power consumers. There is a purpose.

1 is a diagram illustrating a power trading structure in a power trading market.

2 is a view showing a vertically integrated power transaction structure.

3 is a view showing a power transaction structure of the competitive power generation.

4 is a diagram showing a wholesale competitive power transaction structure.

5 shows a fully competitive power trading architecture.

6 is a view showing a power purchase form through the seller according to the present invention.

7 is a view showing a form of purchasing power by participating in the power trading market according to the present invention.

8 is a block diagram of a power sales brokerage system for power transactions using the Internet communication network applied to the present invention.

9 is a block diagram of a power sales brokerage system for power transactions using a wireless communication network applied to the present invention.

10 is a detailed block diagram of a power transaction central control apparatus of a power sales brokerage system applied to the present invention.

11 is a detailed block diagram of a power load control monitoring apparatus applied to the present invention.

<Description of the symbols for the main parts of the drawings>

G1-G5: Power Generator P: Electricity Market

D1-D3: Electric Power Seller L1-L5: Electric Power Consumer

LO: Power Consumer Group

200: central power control device 300a, 300b, 300c: load control monitoring device

In order to achieve the above object, the present invention provides a large-scale electric power customer to trade power directly with a large number of power generation companies, or the electric power consumer purchases power through a power sales company to supply power from an operator (distribution company) having a distribution network. In the electric power transaction that is supplied with the power supply, the power seller directly secures a plurality of power consumers as members, and various kinds of information on the demand power of the customers acquired through a communication network and a load control monitoring device installed in the secured plurality of power customers. Based on the above, the contract of purchasing power to be provided to the power consumers in the power trading market is concluded under favorable conditions, and the power demand managed through the communication network or the direct load control is performed for the power consumers supplied by the purchase contract. It features.

In addition, the present invention is a power sales agent having a power sales intermediary system that secures a large number of power consumers in a group to establish a central power control system through a customer power monitoring control device and a communication network, so that they are direct power sellers Based on the power acceptance information of a number of power consumers, the power purchase agreement is concluded in the power trading market, and the power demand management, which is a member of the power trading market, manages power demand or directly controls the load through the communication network on behalf of the power trading market. It is characterized by.

In addition, the present invention provides a power sales agent having the power sales intermediation system to secure a large number of large-scale customers in groups and to establish a central power control system through the power monitoring control device and the communication network installed these large capacity customers directly with the power generation company Based on the power acceptance information of many of these large-scale electricity consumers in the electricity trade, they signed a power purchase agreement with favorable generation companies, and the power supply through the communication network on behalf of the electricity generation company for the large-scale electricity customers who secured them as members. It is characterized by managing demand or controlling load directly.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

6 is a view showing a power purchase form through a sales operator applied to the present invention.

Referring to FIG. 6, the configuration includes a plurality of generators (G1-G5), a power trading market (P), a plurality of vendors (D1-D3), a power purchase agent (R), and a group of users (LO). do.

The plurality of power generation companies G1 -G5 sells the produced power in a bidding form to the power trading market P. In the power trading market (P), the market operator receives power supplied from a plurality of power generation companies through bidding, and sells power through a bidding transaction with a plurality of selling companies (D1-D3). To each supply. The sellers (D1-D3) provides the power purchased in the power trading market (P) to each customer (L1, L2), wherein the customer buys power from the seller that presents conditions favorable to them I can receive it.

At this time, the seller (D1-D3) does not perform a power sales contract by direct transactions with each customer, but the power purchase agent (R) and the electric power that has secured a large number of power consumers group (L0) as a member By making a sales transaction, you can sell power to a large number of power consumers at once. That is, the power purchase agent (R) selects and purchases the power to be supplied to the customer group (LO) secured as a member from the sellers (D1-D3) with favorable price conditions.

The power purchase agent (R) in the supply to the audience group (LO) to supply the power concluded to supply from the selected seller (D3), load information and through the load control supervision value installed in the audience group (LO) The service status information is acquired through the communication network and provided to the contracted power sales company (D3).

That is, the power purchase agent (R) is a power purchase through the sales operator (D3), the power purchase agent (R) recruits a large number of power consumers as members, so that a certain amount of power sellers to secure directly With the above power demand secured, various power demand information, power demand prediction information, current power demand usage status, etc. of the power consumer secured as members and power load management for each power consumer can be performed. Based on this, we negotiate with a number of power distributors so that they can get electricity at the best price.

Accordingly, in order to act as the power purchase, the power purchase central control unit 200 obtains and monitors the power demand information for the group of consumers, and performs the power load control for the customers. ), And all power receivers recruited as members should be equipped with load control monitoring devices 300a, 300b, 330c, and bidirectional communication should be performed between them. Here, the power transaction central control device and the load control monitoring device will be described in detail with reference to FIGS. 8 to 11 to be described later.

7 is a form in which the power purchase by participating in the direct power purchase market according to the present invention.

Referring to FIG. 7, the configuration includes a plurality of power companies G1-G5, a power trading market P, sellers D1-D3, customers L1-L3, and a customer group LO.

The plurality of power generation companies G1 -G5 sells the produced power in a bidding form to the power trading market P. In the power trading market (P), the market operator receives power supplied by a plurality of power generation companies through a bid, and sells power through a bidding transaction with a plurality of sales companies (D1-D3). To each supply. The sellers (D1-D3) provides the power purchased in the power trading market (P) to each customer (L1, L2), wherein the customer buys power from the seller that presents the conditions favorable to them I can receive it.

In addition, in the electric power trading market (P), the market operator is supplied with power from a plurality of power generation companies through a bid, and the power purchase agent (R) having a plurality of members directly does not go through a power sales company, In the electric power trading market, electric power can be purchased. In this case, the electric power purchasing agent becomes the electric power selling company D3. In other words, to become a sales agency that acts as a power purchaser for a large number of power consumers secured as members. That is, the seller D3 is a member, unlike the case where the other sellers D1 and D2 purchase bids from the power pool in a state in which the power load management is not performed for general power consumers. As a result, since the power loads for the customer groups (LOs) secured and monitored can be monitored and demand information can be utilized for these customers, the power to be supplied to these customers is selected and purchased from the power market (P) under favorable conditions.

At this time, when the selling company D3 provides power to the audience group LO, the bidding power purchased from the power trading market P is acquired, the load information of each customer is monitored, the load of the customer is monitored, and the load is controlled. It is provided with a centralized power transaction control unit 200, and is connected in communication with each load control monitoring device (300a, 300b, 300c) of the customer group (LO) connected through the power transaction central control unit (200).

That is, the selling company D3 directly purchases power through the power trading market P, and recruits a plurality of power consumers as members to handle the power demand for a certain degree or more. You can buy bids at the best prices for them.

Therefore, in order to act as a power purchaser of a customer who has registered as a member through the above-described power bidding purchase, obtain power load information for the customer group L0, and monitor and control the load, the power seller D3 side Power transaction central control unit 200 is installed, load control monitoring devices (300a, 300b, 300c) to all the power consumers (LO) recruited as members should be bidirectional communication through the communication network between them.

Here, the power purchase agent R, which secures the plurality of members and represents the secured electric power customer, does not go through the other selling companies D1 and D2, instead of through other selling companies D1 and D2. It is a way to participate in purchasing power bids through the power trading market. Therefore, it is possible to purchase electricity at a low price and manage each consumer's power demand load because it participates in the power trading market in the form of a combination representing a large number of power consumers already secured.

8 is a view showing a power sales brokerage system for power transactions using the Internet communication network according to the present invention.

Referring to FIG. 8, the configuration includes a power transaction central control apparatus 200, an internet network 280, and a plurality of load control monitoring apparatuses 300a, 300b, and 300c.

The power purchase agent R1 acting as a power purchase agent becomes the selling company D3, and when the power trading central control unit 200 is installed in the selling company D3, the Internet network 280. When connected, the central power control unit 200 is bidirectionally connected to each load control monitoring device 300a, 300b, 300c of the customer group LO.

That is, the central power control unit 200 is composed of a central power control unit 250, Ethernet 260 and router 270, monitoring the load control installed in the customer group (LO) through the Internet network 280 Communication connection with the devices 300a, 300b, 300c. Therefore, the load control signal from the central power control unit 200 is provided to each load control monitoring device (300a, 300b, 300c).

Then, the load control monitoring apparatus 300a, 300b, 300c intercepts the power supply of the connected load by the load control signal provided from the power transaction central control apparatus 200.

In addition, the central power control unit 200 obtains the power information of each load from each load control monitoring device 300a, 300b, 300c connected to the Internet network 280 to predict the overall power demand, Controllable load information and current power usage information are acquired from the load control monitoring devices 300a, 300b, and 300c.

In addition, the central power control unit 200 provides information obtained from each load control monitoring device (300a, 300b, 300c) to the operator of the power trading market (P), the operator of the power trading market (P) The control signal is provided to each load control monitoring device (300a, 300b, 300c) installed in each customer group (LO) according to the load management request. Therefore, each load control monitoring device (300a, 300b, 300c) cuts off the power supply of the load.

On the other hand, when the central power control unit 200 as described above is installed in a separate power purchase agent (R) rather than the seller (D3), the power purchase agent directly recruits each customer as a member to build a certain group In addition, on behalf of the established consumer group (LO), the electric power purchase from the sellers at a low price.

And based on the power demand information, controllable load information, current power demand usage information obtained from the audience group (LO) to predict the overall power demand, such as the database, and the database of the information Provide to (D3).

Accordingly, the power purchase agent provides the above information and provides the load management for the collectively secured power consumers, and the purchase of the power supply company and the power supply at a price lower than the power price sold by the selling company D3 to the general consumer. A contract can be made.

9 is a view showing a power sales brokerage system for power transactions using a wireless communication network applied to the present invention.

Referring to FIG. 9, the configuration includes a power transaction central control apparatus 200, a wireless communication network 290, and a plurality of load control monitoring apparatuses 300a, 300b, and 300c. The central power control unit 200 provides a power control signal to each load control monitoring device (300a, 300b, 300c) through a wireless communication network (290).

The power purchase agent R1 acting as a power purchase agent becomes the selling company D3, and when the power transaction central control apparatus 200 is installed in the selling company D3, the wireless communication network 290. It is bidirectionally connected to each of the load control monitoring devices 300a, 300b, and 300c of the customer group LO to be described later.

That is, the central power control unit 200 is a power transaction central control unit 250 and a wireless communication modem (T1), the wireless communication modem (T1) is installed in each customer group through the wireless communication network 290 It is communicatively connected with the radio communication modem T2-T4 of the control monitoring apparatus. Therefore, the load control signal from the central power control unit 200 is provided to each load control monitoring device (300a, 300b, 300c). Then, the load control monitoring apparatus 300a, 300b, 300c intercepts the power supply of the connected load by the load control signal provided from the power transaction central control apparatus 200.

In addition, the central power control unit 200 obtains the power information of each load from each load control monitoring device 300a, 300b, 300c connected to the wireless communication network 290 to predict the overall power demand, Controllable load information and current power usage information are acquired from the load control monitoring devices 300a, 300b, and 300c.

In addition, the central power control unit 200 provides information obtained from each load control monitoring device (300a, 300b, 300c) to the operator of the power trading market (P), the operator of the power trading market (P) The control signal is provided to each load control monitoring device 300a, 300b, 300c installed in each customer group LO by the load management request. Therefore, each load control monitoring device (300a, 300b, 300c) cuts off the power supply of the load.

On the other hand, when the central power control unit 200 as described above is installed in a separate power purchase agent (R) rather than the seller (D3), the power purchase agent directly recruits each customer as a member to build a certain group In addition, on behalf of the established customer group (LO) to purchase electricity at a low price from the seller.

And based on the power demand information, controllable load information, current power demand usage information obtained from the audience group (LO) to predict the overall power demand, such as the database, and the database of the information Provide to (D3).

Accordingly, the power purchase agent provides the above information and provides the load management for the collectively secured power consumers, and the purchase of the power supply company and the power supply at a price lower than the power price sold by the selling company D3 to the general consumer. A contract can be made.

10 is a detailed block diagram of the centralized power transaction control apparatus applied to the present invention.

Referring to FIG. 10, the configuration includes a communication network connection module 205, power demand and load management information acquisition unit 210, power consumption data acquisition unit 215, main controller 220, power demand change analysis and display unit ( 225, a power demand prediction unit 230, a power price analysis and calculation unit 235, a data acquisition and separation unit 240, a load management plan and an on-load transfer unit 242, and a load management unit 247. .

The data acquisition and separation unit 240 acquires power purchase and general information provided from the power transaction market (P) and separates the information by the corresponding information, and loads the separated information into the load management plan and the on-load delivery unit 242 and Provided to the main control unit 220. Here, the information provided from the power trading market (P) to the data acquisition unit and the separation unit 240 includes time and date power price information, customer load management contract information, customer load management load management plan, overall load prediction information, overall power generation information And a load management signal provided when load management is needed.

Therefore, the main control unit 220 receives the load management signal provided from the data acquisition and separation unit 240 and provides the load control signal to the load management and load transfer unit 242. The load management and load-on-load transmission unit 242 transmits the customer power-related information provided from the data acquisition and separation unit 240 and the load control signal from the main control unit 220 to the load management unit 245. The load management unit 245 provides the customer power related information and the load control signal provided from the load management and on-load transmission unit 242 to the communication network (Internet network or wireless communication network) connected to the power receiver through the communication network connection module 205. do.

Therefore, the load control monitoring apparatus 300a, 300b, 300c of each customer connected through the communication network as described above blocks the power supply of the connected load by the customer power related information and the load control signal.

The network connection module 205 acquires load demand information and power usage information acquired from the load control monitoring apparatuses 300a, 300b, and 300c, and power demand and load management information acquisition unit 210 and power consumption data, which will be described later. Provided to section 215. The power demand and load management information acquisition unit 210 receives information necessary for load management from the communication network connection module 205 and provides the information to the main controller 220 accordingly. Here, the information necessary for load management is provided from the load control monitoring device installed in the power consumer, such as power demand information, controllable load information, and power consumption status.

The power consumption data acquisition unit 215 acquires power usage information of each load control monitoring device 300a, 300b, 300c inputted through the communication network exclusive module 205, and analyzes the change in power demand of the main controller 220 and the customer. And the display unit 225.

The main controller 220 receives power demand, load management information, and usage data from the power demand and load management information acquisition unit 210 and the power consumption data acquisition unit 215, and the power demand information is the power demand conversion analysis and display unit. Provided at 225. Power demand information for each time zone from the main controller 220 is provided to the power demand prediction unit 230. The power price analysis and calculation unit 235 receives the power demand provided from the main control unit 220, analyzes and calculates the price of the used power based on the stored power price information, and provides the power to the power transaction market P. do.

11 is a detailed block diagram of a load control monitoring apparatus installed in each customer according to the present invention.

Referring to FIG. 11, the configuration includes a power meter connection unit 330, a load monitoring controller 312, a load blocking command unit 313, and a load blocking output unit 315.

The electricity meter connection unit 311 is connected to an external electronic electricity meter 330 to provide the load monitoring controller 312 with information measured by the electricity meter. The communication network connection unit 312 is connected to an external communication network and provides the load monitoring control unit 312 with load management information input through the communication network.

The load monitoring controller 312 receives power amount information and load management information, reads power amount, and provides a corresponding load control signal to the load blocking command unit 313 based on the input load management information. The load blocking command unit 313 provides a load blocking command to the load blocking output unit 315 according to the load control signal provided from the load monitoring control unit 312. The load breaking output unit 315 provides a load breaking command to an external load breaker. Therefore, the load breaker cuts off the power line supply to the load and performs the load control.

As described above, the present invention provides a power purchase agent that becomes a power purchase agent that purchases power from a power seller for a customer secured by a plurality of members, or a power seller that participates in a power purchase bidding through a direct power trading market. On the basis of the price that is favorable to the electric power consumers, various kinds of information on the electric power demand of the electric customers required for the electric power purchase on behalf of the electric power customers secured as members, information provided by the electric power sellers, and information provided to the electric power trading market are obtained. It is possible to purchase power, and the power purchase agent secures a large number of electric power customers directly on behalf of a power seller or a power trading market, and acts as a load management for these customers has a stable power supply and supply effect.

Herein, although the present invention has been described with reference to the preferred embodiments, those skilled in the art will variously modify the present invention without departing from the spirit and scope of the invention as set forth in the claims below. And can be changed.

Claims (11)

In a power transaction in which a power consumer directly trades with a large number of power generation companies, purchases power through a power trading market, or purchases power from a power seller, the power is supplied from a distribution company having a distribution network. The power sales operator secures a plurality of power consumers as members; Signing a purchase contract of power to be provided to a plurality of power consumers in the power trading market on behalf of the plurality of power consumers based on the various information on the power demands of the secured plurality of power consumers; The communication network and power, which is connected to a plurality of power consumers are supplied power by the purchase contract, and monitors the load of the power customer to secure the load information of the customer at all times to directly control the load of the customer How to mediate electricity sales using demand management equipment. According to claim 1, wherein the electricity sales company acquires time and date power price information, customer load management contract information, customer load management plan, overall load prediction information and overall power generation information from the power trading market, and obtains the obtained information An electric power sales intermediation method using a communication network and a power demand management device, characterized in that the contract for the purchase of power from the electric power trading market based on the power demand information of the electric power consumer on the basis of the already secured power consumers. The method of claim 1, wherein the power seller acquires power demand information of a plurality of power consumers to predict power demand of the overall consumer, and analyzes load information and power consumption information that can be controlled from the plurality of power consumers. An electric power sales intermediation method using a communication network and a power demand management device, characterized in that the load control of each consumer directly by the power supply contract. The method of claim 1, wherein the electric power distributor owns a distribution network and supplies electric power to the electric power consumer. In a power transaction in which a power consumer directly trades with a large number of power generation companies, purchases power through a power trading market, or purchases power from a power seller, the power is supplied from a distribution company having a distribution network. A power purchase agent that has signed a power purchase contract with the power seller to secure a plurality of power consumers as members; Signing a purchase contract of power to be provided to a plurality of power consumers in the power trading market on behalf of the plurality of power consumers based on the various information on the power demands of the secured plurality of power consumers; The communication network and power, which is connected to a plurality of power consumers are supplied power by the purchase contract, and monitors the load of the power customer to secure the load information of the customer at all times to directly control the load of the customer How to broker power sales using demand management equipment. According to claim 5, The power sales agent obtains power price information, customer load management contract information, customer load management plan, overall load forecasting information and overall power generation information from the electricity supplier, and the obtained information An electric power sales intermediation method using a communication network and a power demand management device, characterized in that to conclude a contract for the purchase of electric power from the electric power seller based on the electric power demand information of the electric power consumer by analyzing the already secured electric power consumers. 6. The power purchase agent of claim 5, the power purchase agent acquires power demand information of a plurality of power consumers to predict the overall power demand, and obtains and analyzes controllable load information and power consumption information from the power customers and concludes with the power seller. An electric power sales intermediation method using a communication network and a power demand management device characterized by controlling the load of each consumer by the power supply contract. In a power transaction in which a large number of power consumers directly trade with a plurality of power generation companies, purchase power through a power trading market, or purchase power from a power seller, and receive power from a distribution company having a distribution network. , A load control monitoring device installed at each of the plurality of power consumers, and configured to monitor power supply to the load of each power customer; And A power purchase central control device connected to the load control monitoring device through a communication network to acquire and analyze power related information of a power consumer, and control a power supply of a load connected to the load control monitoring device at the request of a power trading market; and, The load control monitoring device and the power purchase central control unit is connected to the Ethernet network through the Internet power sales intermediary system using a communication network and a power demand management device, characterized in that bi-directional communication. [9] The power using the communication network and the power demand management device of claim 8, wherein the load control monitoring device and the power purchase central control device are connected through a wireless communication network to control the load according to power purchase by bidirectional communication. Sales brokerage system. [9] The communication network and power demand management of claim 8, wherein the central control unit for power purchase is installed in a power purchase agent that enters into a power purchase contract with a power distributor and acts as a member of a power purchaser. Power sales brokerage system using the device. [9] The communication network and power demand management device of claim 8, wherein the central control unit for power purchase is installed in a power sales operator that owns a power distribution network and acts as a power purchaser of a consumer secured as a member in a power trading market. Power sales brokerage system used.