JP2003173808A - System coordination system of distributed power generating facility - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a system coordination system of a distributed power generating facility capable of operation in high energy efficiency and an effective use of a power generating facility by making calculation on a changing pattern beforehand, in case a change in load is expected at the site of a customer. <P>SOLUTION: The system coordination system of a distributed power generating facility made up by connecting fuel cell generating facility 1 as an example installed in distribution at each customer's site and a commercial power system, is to be provided with a computing and controlling means 2 consisting of customer site LAN's 4 as a communication tool of use information of electric appliances consuming power at the customers' sites, a computing means for calculating necessary amount of power per a predetermined unit time for the appliances by data processing the use information communicated by the LAN's, and a controlling means for adjusting amount of power generated per unit time of the fuel cell generating facility according to the calculation results. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a distributed power generation device in which power generation devices distributed at respective customer sites are connected to a commercial power system, and more particularly to a grid interconnection system for fuel cell power generation devices. .

[0002]

2. Description of the Related Art Conventionally, a distributed power generation system at a customer site such as a general home is rarely operated by being connected to a commercial power supply, and is often used alone.
However, in recent years, applications such as fuel cells and micro gas engines have become popular, and grid interconnection with commercial power sources has begun.

FIG. 2 is a schematic conceptual diagram of a distributed power generation system in the case of system interconnection. The system of Figure 2
For example, a customer 12 himself installs and manages a power generation facility 11 such as a fuel cell using city gas as a raw fuel, a micro gas engine, etc. at the site, and controls the output according to his own power load to generate power 13 Is supplied, the shortage is supplemented from the power system 14, and the excess is reversely flown to the power system 14. Further, the heat generated by the power generation of the power generation device is taken out as hot water 15 and is used by the customer himself for hot water supply or heating.

FIG. 3 is a schematic conceptual diagram showing an example of the relationship between electric appliances consuming electric power and a fuel cell power generator at a customer site, focusing on the use of electric power in the system shown in FIG.

In FIG. 3, a fuel cell power generator 1 is connected to a city gas (natural gas) pipe 5, and hydrogen generated by reforming city gas and oxygen in the air are used for reaction to generate power. To do. The electric output of the fuel cell power generator 1 is supplied from the inverter 3 to the electric wiring 8 in the house through the breaker 7a installed on the interconnection board 6, and is used. It is possible to connect to the electric power system 10 in the city through a breaker 7b installed in 6. Further, a circuit related to reverse power flow (not shown) to the power system 10 is also provided.

In the example shown in FIG. 3, since the electric output of the fuel cell power generator 1 and the total electricity consumed by, for example, the electric appliances 9A to 9D match, the breaker 7b in the interconnection board 6 is When opened, the fuel cell power generator 1
Although it is independent of the electric power distribution system in the city, the total amount of power consumption of electric appliances is constantly monitored, and if there is an excess or deficiency with the electric output of the fuel cell power generator 1, It is prepared so that the breaker 7b can be closed promptly to be connected to the electric power distribution system in the city. In addition, 2a is based on the measured value of the power consumption of the electric appliance and is based on the fuel cell power generator 1
Is a control device for controlling the output control of the device, switching to the power distribution system, and the like.

On the other hand, a system interconnection system for commercial private power generation equipment other than ordinary homes has been partially put into practical use, and various systems have been proposed (for example, Japanese Unexamined Patent Publication No. 8-182192). , JP 2001-102063
Etc.).

The above-mentioned Japanese Patent Laid-Open No. 8-182192 discloses that
Regarding the related art section and the proposed system interconnection system, it is described as follows. That is, “In the past, many factories, buildings, schools, hospitals, facilities, etc. were equipped with private power generation facilities to prepare for emergency situations such as power outages. There are an AC power generation facility that generates AC power using a rotating machine such as a gas engine and a gas turbine, and an AC power generator, and a DC power generation facility that generates DC power such as a solar cell and a fuel cell. In a broad sense, The DC power generation equipment includes those in which the AC output of the generator is converted into DC power by the DC converter in the wind power generation and those in which the AC power from the AC power generation equipment is converted into DC power by the DC converter. The tendency of diesel engine, gas engine,
A cogeneration facility that uses so-called electric heat and uses the heat that is generated at the same time as generating the necessary electric power using a rotating machine such as a gas turbine and an AC generator is drawing attention from the viewpoint of effective use of energy. Large-scale cogeneration type private power generation facilities are being introduced into large-scale facilities such as buildings, hospitals and the like. When such a cogeneration-type private power generation facility is operated in a so-called thermal main power-slave mode with a heat load as the main component, if it is a large-scale private power generation facility, the quality of generated power is excellent and the maintenance and operation of the facility is reliable. Therefore, a so-called reverse flow that allows surplus power to flow to the power system is permitted under specified conditions. Is stated. "

Next, the fuel cell power generator and its system interconnection system will be described in detail below.

The fuel cell is a power generation system in which chemical energy of hydrogen or the like is directly converted into electric energy by an electrochemical reaction. Since combustion and motion are not involved in power generation, energy conversion efficiency is high and vibration and noise are generated. It has the advantage that it is less and the exhaust gas is cleaner. So far, fuel cells have been used for power plant replacement (1-10 MW) and for on-site installation (50-
The one of about 200 kW) has been mainly developed.

As an example of the system interconnection system of a relatively large capacity fuel cell power generator having the above-mentioned features, the outline of the system described in Japanese Patent Laid-Open No. 2001-102063 will be described below. FIG. 4 shows a system diagram of the system, in which the part number is changed from that shown in the publication.

[0012] This system is suitable for operation in a combined heat and power supply business, can sell power at peak power demand, and minimizes the cost of purchasing commercial power and fuel for power and heat demand. The purpose is to provide a fuel cell cogeneration system capable of such operations.

The system shown in FIG. 4 includes a fuel supply amount measuring device 24 for measuring the fuel supply amount supplied to the fuel cell unit 21 and a DC / DC converter for converting the DC power output from the fuel cell unit 21 into AC power. AC inverter 28,
An interconnection control device 29 for selling the converted AC power to the commercial power system or for purchasing the power to meet the power demand when the fuel cell unit is stopped, and the purchased power amount and the sold power amount with the commercial power system. Power purchase / sale power amount measuring instrument 2
5, an output electric power amount measuring device 26 for measuring the amount of electric power supplied from the fuel cell cogeneration system, and exhaust heat from the fuel cell unit 21 is recovered, and water is replenished as necessary and fuel is supplied at a predetermined temperature. Hot water supply device 3 that can be heated
0 and an output calorimeter 27 for measuring the amount of heat supplied from the hot water supply device 30.
It is possible to measure the amount of fuel input to the fuel cell cogeneration system and the amount of output power and heat supply required for the operation of the combined heat and power supply business.

In the system shown in FIG. 4, the measurement results of the fuel supply amount measuring device 24, the power purchase / sale power amount measuring device 25, the output power amount measuring device 26, and the output heat amount measuring device 26 are measured. It is input in each of the fuel cell cogeneration systems arranged in plural required for operation in the combined heat and power supply business by collecting the information by the operation control device 22 and transmitting it to the remote control device 23 installed remotely through the communication line. By collecting the amount of commercial electric power, the amount of fuel, and the output amount of electric power and heat supplied through a communication line, the efficiency of charge collection work is improved.

Further, the operation control device 22 shown in FIG.
Judging from the demand for electricity and heat, it is judged from the unit price of commercial electricity and fuel sent from the remote control device 23 through the communication line in advance by season and the demand pattern of electricity and heat. Of the fuel cell unit 21, the DC / AC inverter 28, the interconnection control device 29, and the hot water supply device 30 so that the power and heat demands are predicted and the purchase cost of the power and fuel is minimized. It has a pattern operation function to control the operation for each.

By the way, in recent years, one of the advantages of the fuel cell over other power generation systems is that high power generation efficiency can be expected regardless of the size of the power generation capacity. ) And small commercial facilities (convenience stores, communal baths, etc.) with relatively small capacity (0.5 to several tens of kW) are being developed.

As the power generation capacity of the apparatus decreases, the difference between the power consumption and the power generation capacity of the individually connected loads is reduced, and the influence of the load fluctuation is strongly exerted. The load fluctuation can be divided into the following two types depending on the span (period). As an example of load fluctuations over a long span, in the case of a general household, there is a great demand for electricity and hot water through meals (cooking), bathing, entertainment (TV, etc.) during the hours from morning to evening, while sleeping. It can be mentioned that there is almost no demand at night.

On the other hand, as an example of load fluctuation in a short span, for example, when a 1 kW air conditioner is connected as a load to a household power generator having an output of 3 kW, the rated output of the power generator is changed by turning on / off the air conditioner. For example, a load fluctuation of 30% or more may occur instantly.

As a measure against the load fluctuation, a method in which a fuel cell power generator is connected to the grid and the excess or deficiency of electric power is exchanged with the grid is generally adopted, and further, As described in Japanese Patent Laid-Open No. 2001-102063, for example, a method (pattern operation) in which the output setting of the fuel cell is changed in the daytime and the nighttime is used in advance.

In addition, when the system is not connected to the grid, there is a method of changing the amount of power generation by following a load change. In this case, however, hydrogen and oxygen, which are particularly necessary for the electrochemical reaction, are suddenly changed. It is indispensable to supply an additional reaction gas so as not to run out by a large load increase.

[0021]

By the way, in the above-mentioned conventional grid interconnection system for distributed power generators, particularly in the grid interconnection system for relatively small capacity fuel cell power generators,
There were the following problems regarding the response to load fluctuations.

For example, when the pattern operation is performed as described above in response to load fluctuation and an air conditioner or the like is used while the fuel cell power generator is operating at low output, the power consumption exceeds the power generation. In some cases, power supply from the grid may be required. In this case, it is possible to control the increase in the fuel cell output by detecting the increase in the power consumption, but in this case, it is possible to respond only by following the change in the power consumption. There is a problem that a time difference occurs until the output increases and the required amount is reached.

In the case where the increase in power consumption is resolved in a short time (for example, the air conditioner is switched off in a short time), even if the output of the fuel cell is increased, electricity will remain (this time). The conventional method of adjusting the output of the fuel cell power generator in accordance with the power consumption amount has a problem from the viewpoint of effective utilization of the power generator and operation under high energy efficiency.

Further, when adopting an operation method in which the output of the fuel cell is made to follow a load change without performing interconnection with the grid, particularly in the case of a power generation device having a small power generation capacity such as for home use, as described above. , A condition in which the difference between the individual load capacity and the power generation capacity is small (for example, a load of 1 kW for a power generator having an output of 3 kW) is predicted, and the ratio of the excess reaction gas supplied to prevent the lack of the reaction gas is high. Then, it becomes difficult to operate the fuel cell power generator with high energy efficiency.

The present invention has been made in view of the above problems. An object of the present invention is to improve energy efficiency by predicting a fluctuation pattern before a fluctuation when a load fluctuation occurs at a customer site. It is intended to provide a grid-connected system of distributed generators that can be operated at the same time and can effectively utilize the generators.

[0026]

In order to solve the above-mentioned problems, according to the present invention, a system of a distributed power generation system in which a power generation device dispersedly installed at each customer site and a commercial power system are connected. In the interconnection system, a means for transmitting usage information of an electric appliance that consumes power at the consumer site, and data processing of the transmitted usage information to predict the required amount of power of the electric appliance for each predetermined unit time. And a control means for adjusting the amount of electric power generated by the power generation device for each unit time based on the result of the calculation (the invention of claim 1).

According to the above system, as will be described in detail later, when a load fluctuation occurs at the customer site, the fluctuation pattern can be predicted before the fluctuation, and the operation of the power generator with high energy efficiency can be performed. Is possible, and again
It is possible to effectively use the power generator.

As an embodiment of the invention of claim 1,
The inventions of claims 2 to 6 below are preferable. That is, in the system interconnection system according to claim 1, the power generation equipment is a fuel cell power generation device or a hybrid of a plurality of types of private power generation equipment (the invention of claim 2). Not only the fuel cell, but also a solar battery, wind power generation, a rotary generator including a micro gas engine, a diesel engine, a gas engine, a gas turbine, and the like, various private power generators can be adopted according to local circumstances.

Further, in the system interconnection system according to claim 1 or 2, the usage information of the electric appliance includes power-on / off information of the electric appliance, set temperature, set humidity, set time, and rated power. The information necessary for predicting the required amount of electric power for each unit time such as the above (the invention of claim 3).

According to the third aspect of the present invention, for example, when the load is activated by a timer, in the conventional case, the power demand increases after the load is activated, and the power generation amount is increased so as to eliminate the demand. On the other hand, according to the present invention, immediately before the load start time by the timer, it becomes possible to predict the insufficient amount of power and adjust the power generation output, so that energy efficiency can be improved and the power generator can be effectively used. .

Furthermore, by interrupting the operation of other loads immediately before the load start time, it becomes possible to continue operating the power generator with high energy efficiency without supplying power from the grid. For example, when a microwave oven that consumes 0.5 kW is further used in a state in which a 1 kW power generator is operating at 1 kW, conventionally, a shortage of increased power consumption (0.5 kW) is generated in the grid. It was necessary to pay the power supply cost to the electric power company even though it was supplied with electricity from the company and owns the distributed generator.

According to the present invention, the information indicating that the main switch of the microwave oven is turned on is stored in the home L, as will be described later.
It is possible to instantly transmit to the equipment a command to temporarily suspend the operation of another load, for example, the operation of the compressor of the air conditioner, by being sent to the power generator by the AN for arithmetic processing, and operate the power generator in a steady state. As it is, it will be possible to respond without receiving power from the grid.

Further, since it is possible to integrate detailed information of each device such as from what time and how much power consumption increases, it is possible to perform arithmetic processing for systematically controlling the output of the fuel cell power generator.

For example, when a microwave oven that consumes 0.5 kW is used while a 1 kW power generator is operating at 0.5 kW, conventionally, an increase in power consumption (0.5 kW) Is supplied from the grid, or when the amount of power supplied from the grid reaches 0.5 kW, an instruction to increase the output of the fuel cell to 1 kW is issued, and then the output of the fuel cell is operated at 1 kW. I was trying to do it.

In the latter case, in electric appliances such as microwave ovens, in most cases, the electric power was already unnecessary when the power generation amount of the fuel cell increased to 1 kW. However, according to the present invention, it is possible to transmit information about the type of electric appliance to be activated. For a short-term load such as a microwave oven, power supply from the grid is used to increase power consumption due to a load such as an air conditioner. Can be dealt with by increasing the amount of power generation, and the energy conversion efficiency can be improved.

As the usage information, in addition to the information necessary for predicting the required electric energy for each unit time,
As will be described later, if necessary, it also includes information related to hot water supply and heating using the exhaust heat of the power generator such as the water temperature in the hot water tank.

Further, in the grid interconnection system according to any one of claims 1 to 3, the arithmetic means is:
When responding to fluctuations in the amount of power supply that accompanies load fluctuations in electrical equipment, a comparative calculation is performed for economic efficiency or environmental friendliness when the power generator is used and when the power grid is used, and based on this calculation result, the power generator A function of adjusting the amount of power generation for each unit time is provided (the invention of claim 4).

According to the fourth aspect of the present invention, in the case where the load generator changes, the power generation device handles the economical efficiency such as the power purchase price and the consumed fuel price, and the environmental friendliness such as CO ₂ emission amount and energy efficiency. By having a function of comparing the case of dealing with the electric power system, it becomes possible to comprehensively select an economical and environmentally friendly countermeasure.

For example, when an electric appliance that consumes 0.5 kW is used while a 1 kW power generator is operating at 0.5 kW, conventionally, an increase in power consumption (0.5 kW) Is according to the preset program,
Either power supply from the grid or increase in fuel cell output is selected and handled unconditionally. On the other hand, according to the present invention, if the temperature of the hot water tank is low and heat can be used by processing the temperature information of the hot water tank together with the information that the electric appliance has been switched on, the fuel cell If you choose to increase the amount of power generation and it is calculated that the temperature of the hot water storage tank is the upper limit and no more heat is needed, you can select the power supply from the power grid, and overall with high energy efficiency. It becomes possible to drive.

Further, in the system interconnection system according to any one of claims 1 to 4, the means for transmitting the usage information of the electric appliance is a communication line means such as a LAN or the Internet in the customer site and / or Alternatively, a wireless information transmission means such as infrared rays is included (the invention of claim 5).

In a fifth aspect of the invention, if a wireless system such as infrared rays is used as the information transmission means, the information can be transmitted by operating a remote controller of the device in order to control on / off of the air conditioner, for example. The information related to the output adjustment can be started by being notified to the fuel cell power generator. In addition, when a wired system represented by the Internet is used as the information transmission means, a home LA that is being considered for use in home appliances
By connecting the fuel cell power generator to N, it is possible to send information for controlling the lighting and air conditioning of the other room in one room to the fuel cell power generator at the same time, and generate power based on that information. It becomes possible to prepare for adjustment of the amount.

In the case of the complete load follow-up type which is not connected to the system, the most important issue is to deal with the reaction gas shortage due to the instantaneous load increase. Even when the load of is put on, due to the high technology that is progressing in recent home appliances, for example, in the case where the refrigerator temperature is always displayed on the front panel, this data can be transferred to the Internet. By transmitting the information to the fuel cell power generator by the information transmission means and performing arithmetic processing, predicting the time when the load increases from the tendency of temperature rise, and increasing the power generation amount or the reaction gas supply amount in accordance with the prediction, the reaction gas It is possible to prevent damage to the fuel cell due to lack.

Further, in the grid interconnection system according to any one of claims 1 to 5, the utilization information transmitting means has a function of transmitting operation management information of the electric appliance for home automation. (Invention of Claim 6).

As in the invention of claim 6, the information transmission means is provided not only between the individual electric appliances that consume electricity but also between the home automation control apparatus that manages the operation of several electric appliances. If it is also provided, it becomes possible for the control device to obtain processing information such as the total amount of required electric power calculated and calculated including energy saving, so that data processing in the fuel cell power generation device is simplified. Benefits are obtained.

In addition, according to the operating condition of the power generator side,
It is also effective to adjust the operation of the electric appliance from the viewpoint of improving the overall efficiency. From this viewpoint, the inventions of claims 7 to 8 are preferable. That is, in the grid interconnection system according to any one of claims 1 to 6, the power generation apparatus is controlled such that the start-up time (standby) of the power generation apparatus is suspended, the operation is interrupted, the operation is restarted, and the output is increased or decreased. The operation means is provided with a transmission means of the operation-related information, and the calculation means has a function of outputting a command for operation adjustment of the electric appliance based on both information of the operation-related information of the power generation device and utilization information of the electric appliance. (Invention of Claim 7). As described above, two-way information transmission between the power generation device and the electric appliance that consumes the electric power enables efficient operation of both.

Further, in the system interconnection system according to claim 7, the means for transmitting the operation-related information of the power generator is the LA in the customer site, as in the invention according to claim 5.
N and communication line means such as the Internet and / or wireless information transmission means such as infrared rays are included (the invention of claim 8).

[0047]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic system system diagram of a system interconnecting system of distributed generators showing an embodiment relating to the present invention. In FIG. 1, the same functional members as those in the system diagram shown in FIG. 3 are designated by the same reference numerals, and detailed description thereof will be omitted.

The difference between the systems of FIGS. 1 and 3 is that in FIG. 1, the LAN in the customer site as a means for transmitting the usage information of the electric appliances that consume power at the customer site indicated by part number 4, Calculation means for processing the usage information transmitted by the LAN to predict the required amount of electric power of the electric appliance per predetermined unit time, and the amount of electric power generated per unit time of the fuel cell power generator based on the calculation result. And a calculation / control means 2 having a control means for adjusting

A microcomputer is incorporated in each of the electric appliances 9A to 9D, and information such as set temperature and actual temperature of each appliance, humidity, scheduled operation start time and scheduled operation end time, and planned electricity consumption is detected. Obtained from,
It is controlled after performing arithmetic processing. This microcomputer has a communication function and can send the information used for the above-mentioned calculation to the calculation / control means 2.

Calculation / control means 2 of the fuel cell power generator 1
Receives various information of each electric appliance 9A-9D at any time,
As mentioned above, mainly on / off information of power supply of electric appliances, set temperature, set humidity, set time, rated power, etc.
Information necessary for predicting the required power amount for each unit time is transmitted. Based on this information, the calculation / control means 2
The fuel cell power generator is controlled by calculating the optimum amount of power generation per unit time. In addition, for the calculation / control means 2,
When a load change occurs, a desired power generation control can be performed by providing a function of performing a comparison calculation of economic efficiency or environmental friendliness when the power generator corresponds to the power system.

In the system shown in FIG. 1, for example, in a private home where a fuel cell power generator with an electric output of 1 kW is installed, the power generator is operated at a low output of 0.1 kW during the day, and the rated capacity is 0. According to the present invention, when an attempt is made to operate an air conditioner of 0.5 kW, when the main switch of the air conditioner is turned on, the operation / control means 2 of the fuel cell power generator 1 is connected to the air conditioner via the LAN 4 at the customer site. Is about to be started, the amount of power required,
Data such as set temperature and current temperature are transmitted.

The calculation / control means 2 of the fuel cell power generator is necessary for operating the fuel cell by increasing the output of the fuel cell by 0.5 kW after predicting the operation duration from the difference between the set temperature and the current temperature, for example. Compare the price of different fuels and the electricity bill that pays for electricity.

Since the electricity bill is high during the daytime, the calculation / control means 2 selects, for example, the output increase of the fuel cell, but the output increase is selected from the economical point of view depending on the time zone and the expected duration of the load. Instead, the power supply from the power system 10 is selected and the control for closing the breaker 7b of the interconnection board 6 is performed.

Further, the calculation / control means 2 has a calculation function concerning not only economy but also environment, and as described above, the calculation / control means 2 of the fuel cell power generation device increases the amount of power generation to store the hot water in the hot water tank. When performing calculations that promote heat recovery to the plant and demonstrate high energy conversion efficiency, both this environmental result and the above-mentioned economic result will indicate an increase in power generation by the fuel cell. Finally, the power generation device is instructed to increase the amount of power generation.

Further, the arithmetic / control means 2 has a function of adjusting the output of the power generator and the operation of the electric appliance on the basis of both the information relating to the operation of the power generator and the usage information of the electric appliance. By doing so, it is possible to enable more efficient operation of both the power generation device and the electric appliance that consumes electric power.

As mentioned above, according to the system of FIG.
It is possible to operate a fuel cell power generator that predicts load fluctuations by taking into consideration the operating status of the power generator, and reduce problems such as reduced energy conversion efficiency due to load fluctuations and inefficient use of equipment. You can

[0058]

As described above, according to the present invention, in the grid interconnection system of the distributed power generators in which the power generators dispersedly installed at each customer site and the commercial power grid are connected, Transmission means for transmitting usage information of an electric appliance that consumes power at a home site, calculation means for processing the transmitted usage information to predict the required amount of electric power of the electric appliance per predetermined unit time, and this calculation And a control unit that adjusts the amount of power generated by the power generation device for each unit time based on the result, further, a time to suspend (standby) the activation of the power generation device, an interruption of operation, a restart of operation, The operation means is provided with means for transmitting information related to the operation of the power generator, such as an increase / decrease in output, and the operation means operates the operation of the electric appliance based on both information related to the operation of the power generator and the usage information of the electric appliance. Since it is assumed that a function of outputting a command for adjusting, on the operating conditions of the generator is also taken into consideration,
When load fluctuations occur at the customer site, by predicting the fluctuation patterns before the fluctuations, it is possible to operate with high energy efficiency and to effectively utilize the power generation equipment. A system can be provided.

[Brief description of drawings]

FIG. 1 is a schematic conceptual diagram of a grid interconnection system of a distributed power generation device according to an embodiment of the present invention.

FIG. 2 is a schematic conceptual diagram of a conventional distributed power generation system for general households.

FIG. 3 is a schematic conceptual diagram focusing on the relationship between an electric appliance and a fuel cell power generator in FIG.

FIG. 4 is a system diagram of an example of a system interconnection system of a conventional fuel cell power generation facility.

[Explanation of symbols]

1: Fuel cell power generator, 2: Calculation / control means, 3: Inverter, 4: LAN at customer site, 5: City gas pipe, 6: Interconnection board, 7a, 7b: Breaker, 8: Electric wiring, 9A ~ 9D: electrical appliances.

Claims (8)

[Claims] 1. A grid interconnection system of distributed generators, which comprises a power generator installed dispersedly at each customer site and a commercial power system, wherein an electric appliance consuming electric power at the customer site. Utilization information transmitting means, arithmetic means for performing data processing on the transmitted utilization information to predict the required electric power amount of the electric appliance for each predetermined unit time, and the unit of the power generation device based on the arithmetic result. A system interconnection system for a distributed power generation device, comprising: a control unit that adjusts the amount of power generation by time. 2. The system interconnection system according to claim 1, wherein the power generation device is a fuel cell power generation device or a hybrid of a plurality of types of private power generation devices. system. 3. The grid interconnection system according to claim 1, wherein the usage information of the electric appliance includes power-on / off information of the electric appliance, set temperature, set humidity, set time, rated power, and the like. A system interconnection system for distributed generators, which uses the information necessary for predicting the required amount of power per unit time. 4. The grid interconnection system according to any one of claims 1 to 3, wherein the computing means handles the fluctuation of the power supply amount accompanying the load fluctuation of the electric appliance by the power generator. A distributed power generation device having a function of performing a comparison calculation of economic efficiency or environmental friendliness when the power system is used, and adjusting the amount of power generation of the power generation device for each unit time based on the calculation result. System interconnection system. 5. The grid interconnection system according to any one of claims 1 to 4, wherein the means for transmitting the usage information of the electric appliance is a communication line means such as a LAN or the Internet in the customer site and / or A system interconnection system for distributed generators, characterized by including wireless information transmission means such as infrared rays. 6. The system interconnection system according to any one of claims 1 to 5, wherein the means for transmitting the usage information comprises:
A system interconnection system for a distributed power generation device, which has a function of transmitting operation management information of the electric appliance of home automation. 7. The system interconnection system according to any one of claims 1 to 6, wherein power generation such as time to suspend (standby) activation of the power generator, operation suspension, operation restart, and output increase / decrease. Equipped with a means for transmitting device-related information,
Further, the computing unit has a function of outputting a command for operation adjustment of an electric appliance based on both the operation-related information of the electric generator and the usage information of the electric appliance. System interconnection system. 8. The system interconnection system according to claim 7, wherein the means for transmitting the operation-related information of the power generator is a communication line means such as LAN or Internet in the customer site and / or a wireless such as infrared ray. A system interconnection system for distributed generators, characterized in that it includes information transmission means.