JP2019071171A - Power selling controlling system and power selling control method - Google Patents

Abstract

To provide a technique for calculating the available power sale volume more accurately by using a variety of information.SOLUTION: A power selling control system 100 where a forecasting information management device 10 for managing the forecasting information about the weather, extraneous material, and the like, and at least one fuel cell system 30 (30a, 30b, ...) are connected via a network 40 includes a power consumption acquisition part 102 for acquiring the use power amount in future day, on the basis of learning results of power consumption in the past in a facility to which the power generated by the fuel cell is supplied, out of the electric energy generated by the fuel cell, a suppression information acquisition part 103 for acquiring the suppression information related to suppression of power generation in the fuel cell from the forecasting information for the future day, and a power selling amount calculation part 104 for calculating the available power sale volume in the future day, by subtracting the power generation suppression amount based on the suppression information in the future day, and the use power amount in the future day, from the electric energy generated in the fuel cell the future day.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a power sale control system and a power sale control method.

Patent Document 1 discloses a management system that predicts an optimal operation pattern of a fuel cell system such that the utility cost consumed by the user is the lowest. The management system of Patent Document 1 includes a user information database for storing a user's family configuration, family schedule, electric power capacity of electric products, capacity of storage tank, etc., and light thermal energy for storing unit price of electricity charges and gas charges and their fluctuations. It has a cost database and a weather information database for storing weather information. The management system uses the information stored in the user information database, the light energy cost database and the weather information database to predict the optimal operation pattern in which the light energy cost consumed is the lowest.
This makes it possible to effectively reduce the cost of electricity and CO ₂ emissions.

JP, 2005-160238, A

  However, Patent Document 1 only predicts the optimum operation pattern of the fuel cell system in which the light and heat consumption cost is the lowest, based on various information stored in the user information database, the light and heat cost database, and the weather information database. Absent. Therefore, there is not disclosed a technique for more accurately calculating the available sale amount of the power generated by the fuel cell system using various information.

  Then, an object of this invention is to provide the technique which calculates more correctly the amount of electricity available for sale in a fuel cell system using various information.

The characteristic configuration of the power sale control system according to the present invention is
A forecast information management device that manages forecast information including at least one of weather forecast information including at least one of temperature forecast and warning forecast, and foreign matter forecast information on forecast of foreign matter included in the atmosphere;
At least one fuel cell system including a fuel cell that receives a supply of fuel and generates power;
Is a power sale control system communicably connected via a network,
The power sale control system
Among the generated electric energy generated by the fuel cell, the past electric energy used in the facility where the fuel cell supplies the generated electric power is learned, and based on the learning result, it is one day from the next day to the present. A power consumption acquisition unit for acquiring power consumption predicted on a future day;
A suppression information acquisition unit that acquires, from the forecast information, suppression information related to suppression of power generation in the fuel cell for the future day;
An amount of power generation suppression in which power generation in the fuel cell is suppressed based on the suppression information in the future day from power generation amount in the fuel cell predicted in the future day, and use predicted in the future day A power sale amount calculation unit that calculates the power sale available amount, which is the amount of power saleable on the future day, by subtracting the amount of power;
In providing the

  According to the above feature configuration, the suppression information acquisition unit acquires suppression information for suppressing power generation in the fuel cell on a future day from the forecast information management device connected via the network. Then, the power sale amount calculation unit calculates the power generation suppression amount considering the suppression information of the future day from the power generation amount of the fuel cell predicted on the future day, and the power consumption amount at the facility predicted on the future day The power sale available amount on the future day is calculated by subtracting In the suppression information, power generation by the fuel cell is suppressed in the future day, such as that the temperature is high, an alarm is issued, and the amount of foreign matter is equal to or greater than the foreign matter threshold value, for the future days from the next day. Information is included. Therefore, by calculating the power sale available amount in consideration of the suppression information, it is possible to calculate the power sale available amount on the future day more accurately.

A further characteristic configuration of the power sale control system according to the present invention is
The power sale control system estimates a deterioration tendency of the power generation amount due to aging of the fuel cell, and acquires a power generation amount acquisition unit that acquires the power generation amount of the fuel cell on the future day based on the deterioration trend There is a point further including.

  According to the above-described feature configuration, it is possible to calculate the amount of power generation in the future day more accurately by considering the deterioration tendency of the fuel cell over time.

A further characteristic configuration of the power sale control system according to the present invention is
The power consumption acquisition unit learns daily usage trends of past power consumption in a facility where the fuel cell supplies generated power, and based on the learned usage trends, uses the power consumption on the future day It is in the point to acquire.

  The activity status etc. of the user in the facility may differ from day to day, and the power consumption may differ from day to day. According to the above feature configuration, the power consumption acquisition unit learns the daily usage trend of the past power usage, and predicts and acquires the power usage on the future day according to the usage trend. Therefore, it is possible to more accurately obtain the amount of power used in the future day, and thus to calculate the available sale amount more accurately.

A further characteristic configuration of the power sale control system according to the present invention is
The power sales amount calculation unit
When the suppression information indicates that the state in which the air temperature on the future day is the air temperature threshold or more continues for the first time, the first time is based on the suppression of the power generation in the fuel cell. ,
In the case where the suppression information indicates a state in which an alarm on the future day is issued continues for a second time, the second time is based on suppression of power generation in the fuel cell.
When the suppression information indicates that the state in which the amount of foreign matter on the future day is equal to or greater than the foreign matter threshold continues for a third time, the power generation in the fuel cell is suppressed for the third time. The power generation suppression amount is calculated by at least one of the following.

  According to the above feature configuration, the power sale suppression amount can be accurately calculated by specifically calculating the power generation suppression amount based on the suppression information that suppresses the power generation for the air temperature, the alarm, and the foreign matter.

A further characteristic configuration of the power sale control system according to the present invention is
The power sale control system manages a power sale price of electric power, receives the power sale available amount on the future day from the power sale amount calculation unit, and outputs a power sale price for the power sale available amount. A device is further communicably connected via the network,
The power sale control system
Operation control that acquires the selling price for the available sale amount on the future day from the sale management device, and controls the power generation of the fuel cell for the future day according to the sale price and the available sale amount It is in the point further equipped with a part.

  Although the power sale management device outputs the power sale price based on the power sale available amount in the future day to the operation control unit, the power sale price is the power sale available amount accurately calculated in consideration of the suppression information. It is an accurate price based. The operation control unit can operate each fuel cell system in consideration of the profit and loss more accurately, based on the accurate selling price and the sellable amount on the future day accurately calculated based on the suppression information. .

A further characteristic configuration of the power sale control system according to the present invention is
The operation control unit
If the selling price is equal to or more than the selling price with respect to the available sale amount, the power generation in the fuel cell is controlled to satisfy the available sale amount;
When the selling price is less than the selling price with respect to the available sale amount, the power generation in the fuel cell is controlled so that the power generated by the fuel cell is not reversely flowed to the commercial power system. is there.

According to the above feature configuration, when the selling price is equal to or higher than the selling price, the fuel cell system controls the power generation of the fuel cell so that the power generation by the fuel cell satisfies the available sale amount. Thus, it is possible to secure a profit by selling the available sales amount at the selling price.
On the other hand, when the selling price is less than the selling price, the fuel cell system controls the fuel cell to suppress power generation so that the power generated by the fuel cell is not reversed by the commercial power system. . Thereby, it is possible to prevent a loss from occurring when selling the available sale amount at the sale price.

  The selling price is the selling price with respect to the total amount of available selling amount, or the selling price per unit time such as per hour for the available sale amount. Similarly, the power sale desired price is a power sale desired price with respect to the total amount of power sale available, or a power sale desired price per unit time such as, for example, per hour for the power sale available amount. Then, the selling price for the entire available sales volume and the selling price for the available available sales volume are compared with each other or the selling price per unit time and the desired sale price per unit time And contrast.

A further characteristic configuration of the power sale control system according to the present invention is
The power sale amount calculation unit sets the desired power sale price based on the power generation cost required for the fuel cell to generate the power sale available amount.

  The power generation cost required for the fuel cell to generate the sellable amount includes the cost of raw fuel required for power generation and the cost required for operating the fuel cell system. The selling price can be calculated more accurately by considering the cost required for power generation.

A further characteristic configuration of the power sale control system according to the present invention is
The future day is the next day to the present.

  According to the above feature configuration, by setting the target date for calculating the available sale amount as the next day, the available sale amount can be calculated based on the forecast information of the next day. Since the forecast information is the information of the next day, the forecast accuracy is high, and the more accurate power sale amount can be calculated.

The characteristic configuration of the power sale control method according to the present invention is
A forecast information management device that manages forecast information including at least one of weather forecast information including at least one of temperature forecast and warning forecast, and foreign matter forecast information on forecast of foreign matter included in the atmosphere;
At least one fuel cell system including a fuel cell that receives a supply of fuel and generates power;
A power sale control method in a power sale control system communicably connected via a network,
Among the generated electric energy generated by the fuel cell, the past electric energy used in the facility where the fuel cell supplies the generated electric power is learned, and based on the learning result, it is one day from the next day to the present. Obtain the expected power consumption in the future day,
The suppression information related to the suppression of power generation in the fuel cell is acquired from the forecast information for the future day,
An amount of power generation suppression in which power generation in the fuel cell is suppressed based on the suppression information in the future day from power generation amount in the fuel cell predicted in the future day, and use predicted in the future day By subtracting the amount of power, it is possible to calculate the amount of power sale that is the amount of power that can be sold in the future day.

  According to the above feature configuration, by calculating the power sale available amount in consideration of the suppression information, it is possible to calculate the power sale available amount on the future day more accurately.

It is a block diagram of a power sale control system. It is an example of a temperature forecast. It is an example of a warning forecast. It is an example of foreign matter forecast information. It is a block diagram of a fuel cell system. It is an example of the deterioration tendency of the electric power generation amount per unit time in a fuel cell. It is a block diagram which shows the structure for acquiring the used electric energy used by the facility load among the electric power generation which the fuel cell generate | occur | produced. It is a schematic diagram which shows the use electric energy of a facility load among the electric power generation which the fuel cell generate | occur | produced. It is a schematic diagram which shows the use electric energy of a facility load among the electric power generation which the fuel cell generate | occur | produced. It is a schematic diagram which shows the use electric energy of a facility load among the electric power generation which the fuel cell generate | occur | produced. It is a schematic diagram which shows an example of the time change of the used electric energy used on the 1st, (a) is an example of the time change of the used electric power of 2017.7.2 (Monday), (b) is 2017 .7.3 (Tuesday) is an example of a temporal change in power consumption. It is a schematic diagram which shows the mode of control of the electric power generation in the fuel cell by the operation control part in the case with reverse tide. It is a schematic diagram which shows the mode of control of the electric power generation in a fuel cell by the operation control part in the case of no reverse tide. It is a flowchart which shows an example of the flow of a power sale control method. It is a schematic diagram which shows the condition where the electric power of a plant | facility load is covered by a part of the generated electric power which the fuel cell generate | occur | produced, and the commercial power of a commercial power grid.

[Embodiment]
Embodiments of a power sale control system and a power sale control method according to the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of a power sale control system.

(1) Overall Configuration of Power Selling Control System In the power selling control system 100, the forecast information management device 10, the power selling management device 20, and a plurality of fuel cell systems 30 (30a, 30b,...) Is connected and configured. The network 40 is a communication network capable of communicating data between devices, and may be, for example, a WAN (Wide Area Network) or the like, but the form thereof may be wireless or wired.

In the power sale control system 100 according to the present invention, the forecast information management device 10 acquires and manages the forecast information of the next day including at least one of weather information and foreign matter information described later. The fuel cell system 30 acquires suppression information for suppressing power generation in the fuel cell system 30 from the forecast information of the next day via the network 40, and calculates the amount of available electricity for the next day based on the suppression information and the like. Then, the fuel cell system 30 transmits the available power sale amount to the power sale management device 20 to acquire the sale price, and controls the operation of the fuel cell system 30 based on this.
In the present embodiment, the day including the current time is set as the current day, and the power sale available amount of the next day for the current day is estimated based on the forecast information and the like of the next day.
Each part of the power sale control system 100 will be described below.

(2) Configuration of Each Part (2-1) Forecast Information Management Device The forecast information management device 10 will be described below. The forecast information management device 10 includes an information collection unit 11 and a storage unit 13.
For example, from the observation device for observing the state of the atmosphere in each area, the Japan Meteorological Agency, etc., the information collection unit 11 predicts the temperature for the next day in each area from the satellite image or the weather forecast predicted by humans based on the satellite image. Obtain weather forecast information including at least one of warning forecasts. The alarm forecast includes, for example, the contents of the alarm such as a heavy rain alarm, a lightning alarm, a storm alarm, and a typhoon approach alarm, and a forecast time of the alarm.
Furthermore, from the observation devices and the Meteorological Agency of each region, satellite images and weather forecasts, the information collection unit 11 includes PM2.5 contained in the atmosphere, sulfur compounds such as sulfur oxide, and atmospheres such as yellow sand and pollen from the next day of each region. Obtain foreign matter forecast information on foreign matters included in

The information collection unit 11 acquires these various types of forecast information, for example, once a day. Alternatively, various types of forecast information may be acquired at predetermined time intervals such as 30 minutes, and the various types of forecast information may be updated as needed.
Then, the information collection unit 11 outputs, to the storage unit 13, the forecast information including at least one of the weather forecast information and the foreign matter forecast information acquired in this manner.

Next, an example of the forecast information stored in the storage unit 13 will be described. 2 and 3 show weather forecast information, FIG. 2 shows an example of a temperature forecast, and FIG. 3 shows an example of a warning forecast. FIG. 4 is an example of foreign matter forecast information.
According to the temperature forecast of the next day of FIG. 2, the temperature change of one day in a certain area is shown with the horizontal axis and the vertical axis as time and temperature, respectively. The temperature is 35 ° C. or higher from 14 o'clock to 17 o'clock the next day, and it is forecasted to rise to 38 ° C.
According to the alarm forecast on the next day of FIG. 3, the forecast time at which an alarm of one day in a certain area is issued is indicated with the horizontal axis and the vertical axis as the time and the type of alarm, respectively. The heavy rain alarm and lightning alarm will be issued until 6 o'clock to 12 o'clock the next day, the storm alarm will be issued until 6 o'clock to 24 o'clock the next day, and the typhoon approach alarm will be issued from 6 o'clock to 18 o'clock the next day It has become.

According to the foreign matter forecast information of the next day of FIG. 4, when the foreign matter is PM 2.5, the change in foreign matter amount of one day in a certain area is shown with the horizontal axis and the vertical axis as time and foreign matter amount, respectively. It is predicted that the amount of PM 2.5 will be 10 μg / m ³ or more from 8 o'clock to 19 o'clock the next day.
In the above example, only the weather forecast information and the foreign matter forecast information of the next day of a certain area are listed as an example, but the information collection unit 11 acquires the weather forecast information and the foreign matter forecast information of the next day of multiple locations. The storage unit 13 stores these by region.

(2-2) Fuel Cell System Hereinafter, the fuel cell system 30 (30a, 30b,...) Provided in each facility such as a home, a school, and a hospital will be described. FIG. 5 is a block diagram of a fuel cell system.
As shown in FIG. 5, the fuel cell system 30 includes a power generation unit 300a, a hot water storage tank 300b, and a control unit 300c.

The electric power generation unit 300a is a part involved in the generation of electric power, and basically, it is discharged from the fuel cell 50 which generates electric power by causing a fuel gas (for example, city gas 13A) and oxygen gas to react with each other. Heat exchanger 60 for recovering heat of combustion exhaust gas, water purifier 70 for recovering and purifying condensed water from combustion exhaust gas after heat recovery by heat exchanger 60, condensed water purified by water purifier 70 And a water supply unit 90 capable of supplying water to the reforming water tank 80 independently of the condensed water.
The hot water storage tank 300b is a tank for storing hot water warmed by the heat of combustion exhaust gas.

  The control unit 300c is a functional unit that acquires the available sale amount and the available sale price of the next day based on the suppression information for suppressing the power generation extracted from the forecast information of the next day, and controls the fuel cell system based on these. . The control unit 300 c includes a generated power amount acquisition unit 101, a used power amount acquisition unit 102, a suppression information acquisition unit 103, a power sale amount calculation unit 104, and an operation control unit 105.

(A) Power Generation Unit and Hot Water Storage Tank Hereinafter, configurations of the power generation unit 300a and the hot water storage tank 300b will be described.
The fuel cell 50 is generated by the reformer 52 that steam-reforms the raw fuel supplied via the raw fuel flow passage 51 to generate a fuel gas, and the reformer 52 via the fuel gas flow passage 53. The anode 55 to which the fuel gas is supplied, the cathode 56 to which air (an example of oxygen gas) is supplied via the air flow path 54, and the electrolyte 57 interposed between the anode 55 and the cathode 56 It generates electricity by reacting the supplied fuel gas and air. One fuel battery cell 50a is configured by the anode 55, the cathode 56, and the electrolyte 57, and a cell stack is configured by stacking the fuel battery cells 50a.

  The power conversion device 110 is connected to the fuel cell 50a, and the power conversion device 110 converts the DC voltage of the DC power generated by the fuel cell 50a into the AC voltage of the commercial power of the commercial power system 35. Do.

  The fuel cell 50 includes a combustion unit 58 to which the fuel gas and air discharged after being used for the power generation reaction from the anode 55 and the cathode 56 are supplied, and remains in the fuel gas by the combustion unit 58. The fuel component is burned to generate a flue gas. As described later, water is supplied to the reformer 52 from the reforming water tank 80 through the water supply passage 82, and the reformer 52 is supplied from the reforming water tank 80. Water is used to perform steam reforming of raw fuel.

  The flue gas discharged from the fuel cell 50 is supplied to the heat exchanger 60 through the flue gas supply passage 61, and the flue gas after heat recovery is exhausted through the flue gas discharge passage 62. Then, the hot water from the hot water storage tank 300 b is supplied to the heat exchanger 60 through a circulation passage 63 that circulates hot water through the hot water storage tank 300 b for storing hot water and the heat exchanger 60. The heat exchanger 60 exchanges heat between the combustion exhaust gas discharged from the fuel cell 50 and the hot water. The circulation passage 63 is provided with a circulation pump 64, a radiator 65 provided with a heat radiation fan 65a, a temperature sensor (not shown), and the like. Further, the hot water storage tank 300b is provided with a hot water discharge passage 31 for pouring hot water in the hot water storage tank 300b, and a water supply passage 32 for supplying water to the hot water storage tank 300b according to the hot water discharge.

  The reforming water tank 80 is for recovering the condensed water generated from the combustion exhaust gas discharged from the fuel cell 50, and in the present embodiment, the condensed water is recovered from the combustion exhaust gas after heat recovery by the heat exchanger 60. It is supposed to Further, in the present embodiment, the condensed water supplied to the reforming water tank 80 is purified by the water purifier 70. Specifically, the condensed water recovery passage from the flue gas flowing through the exhaust gas discharge passage 62 The condensed water is recovered to the water purifier 70 via 71, and the condensed water purified by the water purifier 70 is recovered to the reforming water tank 80 via the condensed water recovery path 81. The condensed water stored in the reforming water tank 80 (and the water supplied from the water supply unit 90) can be supplied to the reformer 52 through the water supply passage 82 by the operation of the pump 83. There is. Further, the reforming water tank 80 is provided with a water level detector 84 so that the water level in the reforming water tank 80 can be detected.

  Further, water can be supplied to the reforming water tank 80 from the water supply unit 90 independently of the condensed water. Specifically, the water supply unit 90 is configured to supply tap water, and the operation control unit 105 causes the valve 92 to open according to the water injection command as the water injection operation, and the refill water from the water supply unit 90 is supplied. Water is supplied via the supply passage 91. Then, the water injection amount from the start of water injection operation is measured by the flow meter 93, and water injection is performed until the water injection amount reaches a predetermined target water injection amount. Further, since tap water is likely to contain more impurities than condensed water, the water supply unit 90 can supply water to the reforming water tank 80 via the water purifier 70 in the water injection operation, and the impurities After the water is removed, the water is supplied to the reforming water tank 80.

(B) Control unit As described above, the control unit 300c includes the generated energy acquisition unit 101, the power consumption acquisition unit 102, the suppression information acquisition unit 103, the power sale amount calculation unit 104, and the operation control unit 105. The configuration of each part will be described below.

(B-1) Generated Energy Acquisition Unit The generated energy acquisition unit 101 estimates the generated energy of the fuel cell 50 on the next day based on the deterioration tendency of the fuel cell 50. Therefore, the power generation amount acquisition unit 101 first acquires the deterioration tendency of the fuel cell 50.
In the fuel cell 50, the fuel cell 50a including the anode 55, the cathode 56, and the electrolyte 57 is deteriorated with the passage of time, and the generated power is reduced. In addition, the decrease in the power generated by the fuel cell 50 may be caused by auxiliary equipment for supplying raw fuel, air, reforming water, etc. for the fuel cell 50 to generate power, auxiliary equipment such as the circulation pump 64 and the heat dissipating fan 65a, It is also caused by the deterioration of various members constituting the fuel cell system 30. Therefore, by acquiring the deterioration tendency indicating a decrease in the power generation of the fuel cell 50 and utilizing this deterioration tendency, it is possible to more accurately estimate the power generation amount of the fuel cell 50.

Examples of the method for acquiring the deterioration tendency of the fuel cell 50 include the following method.
The generated power amount acquisition unit 101 acquires the generated power generated by the fuel cell 50 from the power conversion device 110 connected to the fuel cell 50a at predetermined intervals such as every several minutes. The generated power amount acquisition unit 101 acquires the deterioration tendency due to the age based on the change of the generated power for each predetermined period. For example, the deterioration tendency over time can be obtained by extending the change of the deterioration state every several minutes to the change of the deterioration state of several years.
In addition, a plurality of tables are prepared in advance which show the relationship between the change in the deterioration state every several minutes and the change in the deterioration state for several years. Then, from the table, the change of the deterioration state that is most suitable for the change of the deterioration state that is actually acquired every few minutes and the change that is the most fit is searched from the table, and the change of the deterioration state that corresponds to it is extracted. You may acquire as a deterioration tendency.
Although the generated power of the fuel cell 50 is obtained through the power conversion device 110 in the above description, the generated power of the fuel cell 50 may be obtained, and the invention is not limited to this. For example, the fuel cell 50a may be provided with a probe for measuring the generated power, and the generated power may be acquired from the output of the probe.

  As the deterioration tendency of the fuel cell 50 acquired by the generated power amount acquisition unit 101 as described above, for example, FIG. 6 can be mentioned as an example. FIG. 6 is an example of the deterioration tendency of the amount of generated power per unit time in the fuel cell. In FIG. 6, the horizontal axis is the aging, and the vertical axis is the amount of power generated by the fuel cell 50 per unit time. According to FIG. 6, as the number of years passes from the start of use of the fuel cell system 30, the amount of generated power per unit time of the fuel cell 50 decreases. For example, at the start of use (0 years) of the fuel cell system 30, a power generation amount of 700 Wh (maximum power generation amount) can be secured as the rated output (maximum power generation output). Only 500 Wh of generated power can be secured as the rated output, and the generated power is reduced.

The generated power amount acquisition unit 101 calculates the use period of the fuel cell system 30 from the start of use of the fuel cell system 30 to the next day. Then, the power generation amount acquisition unit 101 acquires the power generation amount per unit time in the fuel cell 50 of the next day based on the usage period and the deterioration tendency of the power generation amount per unit time in the fuel cell 50. . For example, as shown in FIG. 6, when the use period is X years, YWh is acquired as the amount of generated power per unit time in the fuel cell 50 the next day. Then, the power generation amount acquisition unit 101 acquires the power generation amount of the next day by multiplying the operation time of the fuel cell 50 the next day by YWh. By thus calculating the amount of generated power based on the deterioration tendency of the fuel cell 50 with age, it is possible to more accurately acquire the amount of generated power of the fuel cell 50 on the next day.
The generated power amount acquisition unit 101 outputs the acquired generated power amount of the next day to the power sale amount calculation unit 104.

(B-2) Power usage acquisition unit The power usage acquisition unit 102 is a facility where the fuel cell 50 supplies the generated power for one day in the past before the present among the generated power generated by the fuel cell 50. Learn the daily usage trend of the power usage used for and estimate the power usage for the next day based on the learned usage trend. The target date for learning the power consumption is at least a part of the past days up to the current day. The amount of power used can be obtained based on the power load (facility load) of the facility on the fuel cell system 30. Then, the power usage acquisition unit 102 integrates the power usage per unit time for one day, for example, to obtain the power usage per day. In the following, when simply referring to the amount of power used, the amount of power generated by the fuel cell 50 refers to the amount of power used by the corresponding facility.

First, an example of how to calculate the amount of power used by the facility load out of the amount of generated power generated by the fuel cell 50 will be described.
FIG. 7 is a block diagram showing a configuration for acquiring the amount of used power used by the facility load among the amount of generated power generated by the fuel cell. In FIG. 7, a fuel cell system 30, a facility load 121, and a commercial power system 35 for supplying commercial power are connected. With the configuration of FIG. 7, the facility load 121 can receive supply of power from at least one of the generated power of the fuel cell system 30 and the commercial power of the commercial power system 35. The facility load 121 is a power load used by a facility in which the fuel cell system 30 is deployed, and is a power load applied to at least one of the fuel cell system 30 and the commercial power system 35.

The fuel cell system 30, the facility load 121, and the commercial power system 35 for supplying commercial power are connected to each other at the node N1. Commercial power system 35 and node N1 are connected by line 122, facility load 121 and node N1 are connected by line 123, and fuel cell system 30 and node N1 are line 124 Connected by
The line 122 is provided with a power meter CT1 for detecting the current value CCT1 of the power in the line 122. The line 123 is provided with a power meter CT2 for detecting the current value CCT2 of the power in the line 123. The line 124 is provided with a power meter CT3 for detecting the current value CCT3 of the power in the line 124. The power measuring devices CT1, CT2, and CT3 are configured using current transformers (measurement current transformers). The power values of the lines 122, 123, 124 are calculated from the product of the current values CCT1, CCT2, CCT3 measured by the respective power measuring instruments CT1, CT2, CT3 and a predetermined voltage (for example, 100 V, 200 V, etc.) . And the amount of power per day in each line 123, 124, 125 can be calculated from the product of this power value and the time of one day.

  When current flows from the commercial power system 35 to the node N1 side in the line 122, the current value CCT1 becomes a positive value (CCT1> 0). In this case, the facility load 121 uses the commercial power from the commercial power system 35. On the other hand, when the current flows from the node N1 to the commercial power system 35 in the line 122, the current value CCT1 becomes a negative value (CCT1 <0). In this case, the generated power generated by the fuel cell 50 is reverse-flowed to the commercial power system 35 side.

  Below, an example of the method of acquiring the used electric energy used by the facility load 121 among the electric energy generated by the fuel cell 50 will be described using FIG. 8, FIG. 9, and FIG. FIG. 8, FIG. 9, and FIG. 10 are schematic diagrams showing the amount of power used by the facility load among the amounts of power generated by the fuel cell. In FIG. 8, FIG. 9, and FIG. 10, hatched portions are at least one of the power generated by the fuel cell 50 used by the facility load 121 and the commercial power.

  In FIG. 8, the power required by the facility load 121 is covered only by the generated power generated by the fuel cell 50, there is no reverse current to the commercial power system 35, and the current value CCT1 = 0. Therefore, the current value CCT2 = CCT3. When this state is detected, all of the power generation amount generated by the fuel cell 50 is used as the facility load 121. That is, all of the power generation amount of the fuel cell 50 is the power consumption of the facility load 121.

  In FIG. 9, the power required by the facility load 121 is covered only by the generated power generated by the fuel cell 50, and the surplus of the generated power is reversely flowed to the commercial power system 35 side. In this case, the current value CCT1 is a negative value (CCT1 <0). Therefore, when the power measuring device CT1 detects a current value CCT1 of a negative value, the absolute value of the current value CCT1 of a negative value is subtracted from the current value CCT3 detected by the power measuring device CT3 (CCT3- | CCT1 | ). Thus, it is possible to calculate the current value (CCT3− | CCT1 |) corresponding to the amount of power used by the facility load 121 out of the amount of power generated by the fuel cell 50.

  In FIG. 10, the power required by the facility load 121 is covered by both of all the generated power generated by the fuel cell 50 and the commercial power from the commercial power system 35. In this case, the current value CCT1 is a positive value (CCT1> 0), and the current value CCT2 = the current value CCT1 + the current value CCT3. Then, when the power measuring instrument CT1 detects a current value CCT1 of a positive value, all of the generated electric energy generated by the fuel cell 50 is used as the facility load 121. That is, all of the power generation amount of the fuel cell 50 is the power consumption of the facility load 121.

  Although illustration is omitted, when the facility load 121 is covered only by commercial power from the commercial power system 35, the current value CCT1 is a positive value (CCT1> 0), and the current value CCT3 = 0. is there. In this case, since the fuel cell 50 does not generate power, the amount of power used by the facility load 121 with respect to the amount of generated power is zero (0).

  In each of the power measuring devices CT1, CT2 and CT3, the current values CCT1, CCT2 and CCT3 are measured as needed at predetermined time intervals. Then, based on the above-described relationship between the current values CCT1, CCT2 and CCT3, the power usage acquisition unit 102 uses current values at each time point corresponding to the power usage of the facility load 121 with respect to the power generation of the fuel cell 50. Ask for The power value is calculated from the product of the current value at each time point and a predetermined voltage, and the calculated power value is integrated for one day. As a result, the amount of power used by the facility load 121 relative to the amount of power generated by the fuel cell 50 can be determined.

As described above, among the generated electric power generated by the fuel cell 50, the used electric energy used by the facility load is acquired, but next, the usage trend of the used electric energy in the past up to the day is acquired, An example of a method of predicting the power consumption of the next day will be described.
The power consumption acquisition unit 102 acquires the daily usage trend of the power consumption in the corresponding facility, for example, in predetermined time units such as every day, every week, and every month.
For example, the power consumption acquisition unit 102 acquires the usage trend of the power consumption for each day of the week, such as Monday, Tuesday, Wednesday ... Sunday.

FIG. 11 is a schematic diagram showing an example of the temporal change of the used electric energy used on one day, and (a) is an example of the temporal change of the used electric energy on 2017.7.2 (Monday), (B) is an example of a temporal change of the amount of used power on 2017.7.3 (Tuesday).
According to FIG. 11 (a), on Mondays, the power consumption is 100 Wh from 0 o'clock to 6 o'clock and 23 o'clock to 24 o'clock, and from 6 o'clock to 18 o'clock the electric energy used is 400 Wh, 18 o'clock The power consumption is 600 Wh until ~ 23: 00. On the other hand, according to (b) of FIG. 11, the power consumption is 100 Wh from 0 o'clock to 4 o'clock, 7 o'clock to 18 o'clock and 23 o'clock to 24 o'clock on Tuesday, and the electric power used from 4 o'clock to 7 o'clock The amount is 250 Wh, and the amount of used power is 600 Wh from 18 o'clock to 23 o'clock. Then, the power consumption acquisition unit 102 acquires the power consumption per day by integrating temporal changes in the power consumption.
As shown in FIG. 11, the usage tendency of the amount of used power is different between Monday and Tuesday, and the amount of used power is larger on Monday than on Tuesday.
For example, if the next day which is the applicable day for calculating the available sale amount is, for example, a Tuesday, the power usage acquisition unit 102 predicts and acquires the acquired data of Tuesday as the power usage of the next day.

In addition, the power consumption acquisition unit 102 acquires the usage trend of the power consumption in the first week, second week, third week, and fourth week for one month, for example, and divides biweekly by seven days 1 Get daily power consumption. Then, if the next day belongs to the second week of a month, for example, the acquired data of the first day of the second week is predicted and acquired as the used electric energy of the next day at the facility.
In addition, the power consumption acquisition unit 102 acquires the usage trend of the power consumption in January, February ... December, for example, and divides the bimonthly period by the number of days in each month to acquire the power consumption of one day. Do. And if the said next day is a day which belongs to February of 1 year, for example, it will acquire and acquire the data of the 1st of February acquired as the use electric energy of the next day in a plant | facility.
The power usage acquisition unit 102 outputs the power usage of the acquired facility on the next day to the power sales computation unit 104.

  The activity status etc. of the user in the facility may differ from day to day, and the usage tendency of the used energy may differ from day to day. Therefore, as described above, the power consumption acquisition unit 102 learns the daily usage trend of the power usage for the past, and predicts and acquires the power usage on the next day according to the usage trend. Therefore, it is possible to more accurately obtain the power consumption for the next day.

(B-3) Suppression Information Acquisition Unit The suppression information acquisition unit 103 accesses the forecast information management device 10, refers to the storage unit 13, and controls the suppression information related to the suppression of power generation by the fuel cell 50 as weather forecast information. And it acquires from the forecast information including at least one of the foreign matter forecast information.

  Here, when the air temperature is high and is equal to or higher than the air temperature threshold, the water in the combustion exhaust gas emitted from the fuel cell 50 of the fuel cell system 30 can not be sufficiently condensed. Therefore, water can not be fully recovered from the combustion exhaust gas, and the water self-sustaining operation is inhibited. For example, when water can not be supplied from the outside of the fuel cell system 30, the fuel cell system 30 may break down. Therefore, it is necessary to suppress power generation in the fuel cell system 30 so as not to be in a water shortage situation. The water self-sustaining operation is an operation of the fuel cell system 30 using a cycle of recovering the water in the combustion exhaust gas as reforming water and supplying the recovered reforming water to the reformer 52. The system 30 does not require additional water supply from the outside.

  In addition, when heavy rain, lightning, storm and typhoon approach are at the alarm level, the line for supplying commercial power is cut off due to these, and a large current is added to the commercial power, etc. Fluctuations and commercial power supply outages occur. Here, the fuel cell system 30 can be linked and operated with a commercial power system 35 that supplies commercial power. Therefore, when the commercial power becomes unstable due to voltage fluctuation and supply stoppage of the commercial power, the operation of the fuel cell system 30 also becomes unstable, and the fuel cell system 30 may be broken. Therefore, it is necessary to suppress power generation in the fuel cell system 30, and to prevent failure or the like.

  In addition, when the amount of foreign matter is equal to or greater than the foreign matter threshold value, for example, foreign matter such as PM 2.5, sulfur compounds, yellow sand and pollen may be taken into the fuel cell system 30 together with air and the fuel cell system 30 may break down. is there. Therefore, it is necessary to suppress power generation in the fuel cell system 30, and to suppress the entry of foreign matter.

The suppression information acquisition unit 103 is the forecast information of the storage unit 13 for the area where the fuel cell system 30 is provided, in order to acquire suppression information that is a condition under which the power generation by the fuel cell 50 as described above is suppressed. Refer to That is, from the forecast information, the suppression information acquisition unit 103 sets conditions such as the case where an alarm is issued and the case where the amount of foreign matter is equal to or more than the foreign matter threshold, etc. get.
Specifically, for example, the suppression information acquisition unit 103 acquires, as suppression information, the temperature when the temperature is equal to or higher than the air temperature threshold and the time during which the temperature is continuing. For example, when the air temperature threshold is 35 ° C., the suppression information acquiring unit 103 determines that the time when the air temperature is 35 ° C. or more is 3 hours from 14 o'clock to 17 o'clock the next day according to the temperature forecast in FIG. Get suppression information.

  Further, for example, the suppression information acquisition unit 103 acquires the content of the issued alarm and the time when the alarm is issued as the suppression information. For example, according to the warning forecast in FIG. 3, the suppression information acquisition unit 103 determines that the heavy rain warning and the lightning warning are issued for six hours from 6 o'clock to 12 o'clock the next day, and the storm warning is issued for the next day It is 18 hours from 6 o'clock to 24 o'clock, and the suppression information that the time when the approaching alarm of the typhoon is issued is 6 hours from 6 o'clock to 18 o'clock of the next day is acquired.

In addition, for example, the suppression information acquisition unit 103 acquires, as suppression information, the type of foreign object when it is equal to or higher than the foreign material threshold, the amount of foreign object, and the time during which the amount of foreign object continues. For example, when the foreign matter threshold value is 10 μg / m ³ for PM 2.5, the suppression information acquisition unit 103 determines from the foreign matter forecast information in FIG. 4 that the amount of PM 2.5 that is the foreign matter is 10 μg / m ³ or more. However, the suppression information that it is 11 hours from 8:00 to 19:00 of the next day is acquired. Here, PM2.5 is taken as an example of the foreign matter, and the foreign matter threshold is 10 μg / m ³ , but the foreign matter threshold may be different according to the type of the foreign matter.
The suppression information acquisition unit 103 outputs the acquired suppression information to the power sale amount calculation unit 104 and the operation control unit 105.

(B-4) Electric power selling amount calculation part (i) Calculation of electric power selling amount The electric power selling amount calculation part 104 acquires the electric power generation amount of the fuel cell 50 the next day from the electric power generation amount acquisition part 101. The power sale amount calculation unit 104 acquires, from the used power amount acquisition unit 102, the used power amount of the next day at the facility where the fuel cell system 30 including the fuel cell 50 is provided. Further, the power sale amount calculation unit 104 calculates the amount of power generation suppression in the fuel cell 50 the next day as described later.
Then, on the next day, the power sale amount calculation unit 104 subtracts the power generation suppression amount at which the power generation is suppressed by the suppression information and the power consumption amount at the facility from the power generation amount at the fuel cell 50 on the next day. Calculate

The power sale amount calculation unit 104 calculates the above-described power generation suppression amount based on the suppression information, for example, as follows.
The power sale amount calculation unit 104 calculates the amount of power generation suppression based on the temperature information acquired from the suppression information acquisition unit 103 when the temperature is equal to or higher than the air temperature threshold and the time during which the temperature is continuing.
For example, the amount of electricity sold by calculation unit 104 and operation control unit 105 is 3 hours from 14 o'clock to 17 o'clock on the next day (FIG. 2). It is assumed that it is acquired from 103. In this case, the operation control unit 105 performs control so as to suppress power generation in the fuel cell 50 in order to prevent failure or the like of the fuel cell system 30 for three hours from 14 o'clock to 17 o'clock on the next day. The operation control unit 105 may stop power generation by the fuel cell 50 for three hours, or may suppress the amount of power generation at a constant rate regardless of the temperature, or the temperature may be high. Accordingly, the amount of suppression of power generation in the fuel cell 50 may be adjusted.

  The power sale amount calculation unit 104 calculates the power generation suppression amount based on the suppression or stop of the power generation in the fuel cell 50 for three hours. For example, if the suppression amount with respect to 700 Wh which is a rated output is 40% during three hours from 14 o'clock to 17 o'clock, the power sale amount calculation unit 104 sets the generation suppression amount to 700 Wh × 0.4 × 3 h = 840 W calculate.

Further, the power sale amount calculation unit 104 calculates the power generation suppression amount based on the content of the issued alarm that is acquired from the suppression information acquisition unit 103 and the suppression information of the time when the alarm is issued.
For example, when the power sale amount calculation unit 104 and the operation control unit 105 issue the heavy rain alarm and the lightning alarm for 6 hours from 6 o'clock to 12 o'clock on the next day, the storm alarm is issued for 6 hours on the following day. It is 18 hours from 12:00 am to 24:00, and the suppression information that the time when the approaching alarm of the typhoon is issued is 6 hours from 6:00 to 18:00 on the next day is acquired from the suppression information acquisition unit 103 To do (Figure 3). In this case, the operation control unit 105 suppresses power generation in the fuel cell 50 in order to prevent failure of the fuel cell system 30, etc., for 18 hours from 6 o'clock to 24 o'clock at which the alarm of the next day is issued. Control to do so. For example, the operation control unit 105 may stop power generation in the fuel cell 50 for 18 hours, or may suppress the amount of power generation at a constant rate regardless of the type of alarm, or depending on the type of alarm The amount of power generation may be reduced at different rates.

  The power sale amount calculation unit 104 calculates the amount of power generation suppression based on the suppression or stop of the power generation in the fuel cell 50 for 18 hours. For example, if the suppression amount with respect to 700 Wh which is a rated output is 30% during 18 hours from 6 o'clock to 24 o'clock, the power sale amount calculation unit 104 sets the generation suppression amount to 700 Wh × 0.3 × 18 h = 3780 W calculate.

Further, based on the suppression information of the amount of foreign matter, the amount of foreign matter, and the time during which the amount of the foreign matter continues, the power sale amount calculation unit 104 acquires the foreign matter threshold acquired from the suppression information acquisition unit 103. Calculate the power generation suppression amount.
For example, the suppression information that the time when the amount of PM 2.5 is 10 μg / m ³ or more is 11 hours from 8 o'clock to 19 o'clock on the next day is the suppression information It is acquired from the acquisition unit 103 (FIG. 4). In this case, the operation control unit 105 performs control so as to suppress power generation by the fuel cell 50 in order to prevent failure of the fuel cell system 30 or the like for 11 hours from 8:00 to 19:00 on the next day. Do. For example, the operation control unit 105 may stop power generation in the fuel cell 50 for 11 hours, or may suppress the power generation amount at a constant rate regardless of the amount of foreign matter and the type of foreign matter. The amount of power generation may be suppressed at a rate that varies depending on the amount of foreign matter and the type of foreign matter.

The power sale amount calculation unit 104 calculates the amount of power generation suppression based on the suppression or stop of the power generation in the fuel cell 50 for 11 hours. For example, if the suppression amount with respect to 700 Wh which is a rated output is 10% during 11 hours from 8:00 to 19:00, the power sale amount calculation unit 104 sets the generation suppression amount to 700 Wh × 0.1 × 11 h = 770 W calculate.
The power sale available amount is calculated by subtracting the amount of power generation suppression calculated as described above and the amount of power used in the facility from the amount of power generation of the fuel cell 50. As described above, since the power sale amount calculation unit 104 calculates the power sale possible amount in consideration of the power generation suppression amount based on the suppression information for suppressing the power generation including the temperature on the next day and the warning and the foreign matter, It can be calculated accurately. Further, as described later, the operation control unit 105 can obtain a more accurate power sale price by outputting the power sale available amount thus accurately calculated to the power sale management device 20.

(Ii) Setting of Selling Electricity Suggested Price Further, the sold electricity amount calculation unit 104 sets the selling electricity desired price based on the power generation cost, etc. required for the fuel cell 50 to generate the above-mentioned available sales amount.
The power generation cost required for the fuel cell 50 to generate the sellable amount includes, for example, the cost of raw fuel required for power generation and the cost required for operating the fuel cell system 30. Raw fuel costs may be fixed, but may be linked to fluctuations such as, for example, soaring or falling. Further, the cost required to operate the fuel cell system 30 includes, for example, the cost required to drive various pumps and fans, and to heat the raw fuel. This operating cost may be fixed or may vary depending on the actual cost. This makes it possible to calculate the power sale price more accurately.

In addition, the power generation cost required for the fuel cell 50 to generate the electric power selling amount may include other than the above-described cost, and may include, for example, a repair cost of the fuel cell system 30 and the like. . Furthermore, the sale price may be calculated in consideration of the purchase price of the commercial power of the commercial power system 35.
The power sale amount calculation unit 104 sets a power sale desired price so as to exceed the power generation cost and the like calculated as described above. As a result, if the power sale possible amount can be sold at the sale price, it is possible to secure a profit.

The power sale amount calculation unit 104 outputs the power sale available amount calculated based on the power generation amount, the power generation suppression amount, and the power consumption to the power sale management device 20 and the operation control unit 105. Note that there is a possibility that the power sale available amount may be negative, but in this case, the power sale amount calculation unit 104 needs to output a negative power sale available amount to the power sale management device 20 because there is no power to sell. There is no.
Further, the power sale amount calculation unit 104 outputs the power sale price to the operation control unit 105.

(B-5) Operation control unit (i) Power generation suppression control based on suppression information As described above, the operation control unit 105 acquires suppression information from the suppression information acquisition unit 103, and the fuel cell 50 uses the suppression information. Control to suppress the generation of electricity.

(Ii) Operation Control The operation control unit 105 acquires a power sale price from the power sale management device 20 that has acquired the available power sale amount from the power sale amount calculation unit 104 as described later. The sale price is the price when the available sale amount is sold the next day. In addition, the operation control unit 105 acquires the available sale amount and the desired sale price from the sale amount calculation unit 104.
The operation control unit 105 controls the power generation of the fuel cell 50 the next day according to the selling price, the selling amount and the selling price, as described later.
The operation control according to the selling price, available selling amount, and desired selling price will be further described below.

For example, in the case where the available sale amount is sold at a sale price, if there is a profit against the cost required to generate the available sale amount, that is, the sale price of the available sale amount is If the selling price is equal to or higher than the selling price, the operation control unit 105 controls the fuel cell system 30 so that the power generation by the fuel cell 50 satisfies the sellable amount. Specifically, the operation control unit 105 controls the electric power generation by the fuel cell 50 so as to reverse the commercial power supply, so as to secure the sellable amount.
On the other hand, when selling the available sales volume at the selling price, if there is a loss with respect to the cost required to generate the available sales volume, that is, selling the available sales volume If the price is less than the selling price, the operation control unit 105 controls the fuel cell 50 to suppress the power generation so that the power generated by the fuel cell 50 is not reversed by the commercial power supply.

FIG. 12 is a schematic view showing a state of control of power generation in the fuel cell by the operation control unit in the presence of reverse tide. FIG. 13 is a schematic view showing a state of control of power generation in the fuel cell by the operation control unit when there is no reverse tide.
When the sale price of the sale amount is equal to or more than the sale price, the operation control unit 105 operates the fuel cell 50 so that, for example, the generated output is 700 W of the rated output as shown in FIG. Control. In this case, the hatched portion where the power generation output by the fuel cell 50 is higher than the facility load is the amount of backflowed power. As a result, it is possible to secure the available sale amount, and by selling the available sale amount at the sale price, it is possible to secure a profit.

  On the other hand, when the selling price of the available sale amount is less than the selling price, the operation control unit 105 causes the power generation output of the fuel cell 50 to follow the facility load, for example, as shown in FIG. The operation of the fuel cell 50 is controlled to prevent it. Thereby, it is possible to prevent a loss from occurring when selling the available sale amount at the sale price.

With the above control, each fuel cell system 30 takes into account the profit and loss more accurately, based on the power sale available amount on the next day accurately calculated based on the suppression information, the sale price and the sale price. Can drive.
(2-3) Electric Power Selling Management Device The electric power selling management device 20 will be described below. The power sale management device 20 includes a bid control unit 21.
The bid control unit 21 of the power sale management device 20 acquires the power sale available amount from each of the power sale amount calculation units 104 of the plurality of fuel cell systems 30. The bid control unit 21 determines the selling price in consideration of the sum of the available sales amounts of the plurality of fuel cell systems, the relationship between the demand and supply of electric energy, the time zone, and the like. The bid control unit 21 outputs the determined power sale price to the operation control unit 105 of the fuel cell system 30.

(3) Power Selling Control Method Next, the power selling control method will be described. FIG. 14 is a flowchart showing an example of the flow of the power sale control method.

Step S10: The power generation amount acquisition unit 101 acquires the deterioration tendency of the fuel cell 50, and calculates the power generation amount of the fuel cell 50 on the next day based on the deterioration tendency. The generated power amount acquisition unit 101 outputs the acquired generated power amount of the next day to the power sale amount calculation unit 104.
Step S11: Among the generated electric power generated by the fuel cell 50, the used electric energy acquiring unit 102 acquires the used electric energy that the facility to which the fuel cell 50 supplies the generated electric power is expected to be used the next day. The used power amount acquisition unit 102 outputs the used power amount of the next day at the facility to the power sale amount calculation unit 104.

Step S12: The suppression information acquisition unit 103 accesses the forecast information management device 10 and refers to the storage unit 13 to acquire suppression information related to the suppression of power generation in the fuel cell 50 from the forecast information. The suppression information acquisition unit 103 outputs the acquired suppression information to the power sale amount calculation unit 104 and the operation control unit 105.
The operation control unit 105 performs control so as to suppress power generation in the fuel cell 50 based on the suppression information.
Step S13: The power sale amount calculation unit 104 calculates the power generation suppression amount of the next day based on the suppression information.

Step S14: The power sale amount calculation unit 104 can sell electricity by subtracting the power generation suppression amount at which the power generation is suppressed by the suppression information and the power consumption at the facility from the power generation amount at the fuel cell 50 on the next day. Calculate the quantity. Further, the power sale amount calculation unit 104 sets the power sale desired price based on the power generation cost and the like required for the fuel cell 50 to generate the above-described power sale available amount. Further, the power sale amount calculation unit 104 outputs the power sale price to the operation control unit 105.
Step S15: The power sale amount calculation unit 104 outputs the power sale available amount to the power sale management device 20 and the operation control unit 105.

Step S16: The operation control unit 105 acquires the power sale price from the power sale management device 20.
Step S17: The operation control unit 105 compares the power sale price of the power sale available amount with the power sale desired price, and if the power sale price is equal to or higher than the power sale desired price (Yes in step S17), processing is performed in step S18. Advance. On the other hand, when the selling price is less than the selling price (No in step S17), the operation control unit 105 proceeds to step S19.

Step S18: If the selling price of the available sale amount is equal to or more than the wanted sale price, the operation control unit 105 causes the commercial power system 35 to reverse the power generated by the fuel cell 50, and the available sale amount is The power generation in the fuel cell 50 is controlled so that it can be secured.
Step S19: The operation control unit 105 controls the fuel cell 50 so that the power generated by the fuel cell 50 is not reversed by the commercial power system 35 when the selling price of the available sale amount is less than the selling price. Control to suppress power generation in
In the above steps, the processes of S10 to S13 may be in any order.

[Another embodiment]
(1) In the above embodiment, the power generation amount, the power generation suppression amount, and the power consumption amount are estimated about the next day per day, and the power sale available amount is estimated. Then, the power sale amount calculation unit 104 outputs the power sale available amount for one day of the next day to the power sale management device 20. Therefore, the operation control unit 105 acquires, from the power sale management device 20, the power sale price for the total amount of the available power sale amount for the day.
However, the power generation amount, the power generation suppression amount, and the power consumption amount are estimated at predetermined time intervals such as every hour of the next day, and the power sale available amount of the next day is calculated every predetermined time interval such as every hour. It is also good. Then, the power sale amount calculation unit 104 outputs the power sale available amount at predetermined time intervals to the power sale management device 20, and the operation control unit 105 acquires the power sale price at predetermined time intervals from the power sale management device 20. It is also good.

For example, the generated power amount acquisition unit 101 acquires the generated power amount from 0 o'clock to 1 o'clock the next day based on the deterioration tendency of the generated power amount per unit time. Also, for example, when the next day is Monday, the power usage acquisition unit 102 acquires 100 Wh as the power usage from 0 o'clock to 1 o'clock with reference to (a) of FIG. 11. Further, the power sale amount calculation unit 104 calculates the power generation suppression amount based on the suppression information from 0 o'clock to 1 o'clock of the next day. In this case, the operation control unit 105 performs control so as to suppress power generation in the fuel cell 50 by a predetermined suppression amount, based on suppression information of the relevant time, from 0 o'clock to 1 o'clock on the next day. Then, the power sale amount calculation unit 104 calculates the power sale available amount by subtracting the power generation suppression amount and the used power amount from the generated power amount from 0 o'clock to 1 o'clock on the next day.
The power sale amount calculation unit 104 outputs the power sale available amount from 0 o'clock to 1 o'clock of the next day to the power sale management device 20. Then, the power sale management device 20 acquires the available sale amount from the plurality of fuel cell systems 30 from 0 o'clock to 1 o'clock the next day, and based on the relationship of the demand and supply of the electric energy, etc. Determine the sale price. The power sale management device 20 outputs the power sale price from 0 o'clock to 1 o'clock the next day to the operation control unit 105.

Further, in the above-described embodiment, the power sale amount calculation unit 104 calculates the power sale desired price with respect to the total amount of the power sale available amount on the 1st of the next day. However, the sale price may be calculated at predetermined time intervals, such as every hour, as described above. For example, when the power sale amount calculation unit 104 calculates the power sale available amount for 0 o'clock to 1 o'clock on the next day, the power sale amount calculation unit 104 calculates a sale price on the next day from 0 o'clock to 1 o'clock. The operation control unit 105 acquires a power sale desired price for the calculated next day from 0 o'clock to 1 o'clock. Thus, the operation control unit 105 can control the fuel cell system 30 by comparing the selling price and the selling price for the next day from 0 o'clock to 1 o'clock. For example, the operation control unit 105 secures the power sale amount estimated for the relevant time so that reverse tide is possible when the sale price is equal to or higher than the sale price for the next day from 0 o'clock to 1 o'clock. The fuel cell system 30 is controlled as follows. Also, for example, when the selling price is less than the selling price for the next day from 0 o'clock to 1 o'clock, for example, the operation control unit 105 does not follow the facility load and does not reverse the fuel cell for the relevant time Control the system 30;
By controlling the fuel cell system 30 by comparing the selling price and the selling price at predetermined time intervals as described above, it is possible to perform control in which the profit and loss are finely considered at each predetermined time interval. .

(2) In the above embodiment, the fuel cell system 30 generates the power generation amount acquisition unit 101 that acquires the power generation amount of the fuel cell 50, the power consumption amount acquisition unit 102 that acquires the power consumption at the facility, and the fuel A suppression information acquisition unit 103 that acquires suppression information related to suppression of power generation by the battery 50, a power sale amount calculation unit 104 that calculates a power sale available amount, and an operation control unit 105 are provided.
However, at least one of the functional units of the power generation amount acquisition unit 101, the power consumption acquisition unit 102, the suppression information acquisition unit 103, the power sale amount calculation unit 104, and the operation control unit 105 is connected via the network 40. It may be provided in a separate device.

  For example, although it is an example, the power generation amount acquisition unit 101, the power consumption acquisition unit 102, and the operation control unit 105 are provided in the fuel cell system 30, and the suppression information acquisition unit 103 and the power sale amount calculation unit 104 are separate devices. May be provided. Then, the power generation amount acquisition unit 101 of the fuel cell system 30 calculates the power generation amount of the fuel cell 50 on the next day, and the power usage amount acquisition unit 102 of the fuel cell system 30 is estimated to use the next day get. Further, the suppression information acquisition unit 103 of the separate device acquires, from the forecast information management device 10, suppression information related to the suppression of the power generation in the fuel cell 50. The power sale amount calculation unit 104 of the separate device calculates the power generation suppression amount of the next day based on the suppression information. Furthermore, the power sale amount calculation unit 104 of the separate device obtains the generated power amount and the used power amount from the fuel cell system 30, and subtracts the power generation suppression amount and the used power amount from the generated power amount to calculate the power sale amount Do. The power sale amount calculation unit 104 of the separate device outputs the power sale available amount to the power sale management device 20. Further, the power sale amount calculation unit 104 of the separate device calculates a power sale price and outputs it to the operation control unit 105 of the fuel cell system 30. The operation control unit 105 of the fuel cell system 30 acquires the electricity sale price from the electricity sale management device 20, and controls the fuel cell system 30 based on the electricity sale price, the sale price and the available sale amount.

  For example, although it is an example, even if the generated energy acquisition unit 101, the power consumption acquisition unit 102, the suppression information acquisition unit 103, the power sale amount calculation unit 104, and the operation control unit 105 are provided in separate devices. Good. The power generation amount acquisition unit 101 of the separate device calculates the power generation amount of the fuel cell 50 on the next day, and the power usage amount acquisition unit 102 acquires the power consumption estimated to be used on the next day. Further, the suppression information acquisition unit 103 of the separate device acquires suppression information related to the suppression of power generation in the fuel cell 50 from the forecast information management device 10, and calculates the power generation suppression amount of the next day. Furthermore, the power sale amount calculation unit 104 of the separate device calculates the power sale available amount by subtracting the power generation suppression amount and the power use amount from the power generation amount, and outputs the power sale available amount to the power sale management device 20. Further, the power sale amount calculation unit 104 of the separate device calculates a power sale price. The operation control unit 105 of the separate device acquires the power sale price from the power sale management device 20, and controls the fuel cell system 30 based on the sale price, the desired price for sale, and the available sale amount.

(3) In the above embodiment, when the commercial power of the commercial power system 35 is used, the generated power generated by the fuel cell 50 is not reversed. That is, all the generated power generated by the fuel cell 50 is used by the facility load, and when the shortage occurs, commercial power is supplied from the commercial power system 35 to the facility load.
However, it is also possible to supply commercial power from the commercial power system 35 to the facility load while reversing the generated power generated by the fuel cell 50 to the commercial power system 35 side. For example, when the purchase price of the commercial power of the commercial power system 35 is lower than the sale price of the generated power of the fuel cell 50, the above-mentioned situation may occur. In this situation, a method of acquiring the amount of power used by the facility load among the amount of power generation generated by the fuel cell 50 will be described below with reference to FIGS. 7 and 15 described above.

  FIG. 15 is a schematic view showing a state in which the power of the facility load is supplied by a part of the generated power generated by the fuel cell and the commercial power of the commercial power grid. That is, a part of the generated power generated by the fuel cell 50 is the power used by the facility load 121, and the remainder of the generated power generated by the fuel cell 50 is reversed to the commercial power grid 35. Then, the commercial power from the commercial power system 35 is supplied to the extent that the power required by the facility load 121 is not satisfied by the power generated by the fuel cell 50 alone. FIG. 15 shows such a situation, and the hatched portions are the power generated by the fuel cell 50 used by the facility load 121 and the commercial power. Here, the amount of commercial power used by the facility load 121 is α. Further, the amount of generated power generated by the fuel cell 50 is represented by β + γ. β is the amount of power used by the facility load 121 out of the amount of power generation (β + γ) of the fuel cell 50. γ is the amount of power reversely flowed to the commercial power system 35 in the amount of power generation (β + γ) of the fuel cell 50.

  In FIG. 7, the power measuring device CT1 is a commercial current generated when the facility load 121 uses the commercial power from the commercial power system 35 and the positive current value CCT1 (+), and the generated power generated by the fuel cell 50 is commercial. It is assumed that the current value CCT1 (-) of the negative value in the case of reverse current flow to the power system 35 is configured to be separately measurable. In the case of FIG. 15, the current value CCT1 (+)> 0, and the current value CCT1 (−) <0. When this state is detected, it is possible to calculate a current value (CCT3− | CCT1 (−) |) corresponding to the amount of power used by the facility load 121 out of the amount of power generation generated by the fuel cell 50. The power value at this point can be determined from the product of the current value and a predetermined voltage. Then, the power value is calculated from the product of the current value and the predetermined voltage according to the situation at each time point, and the calculated power value is integrated for one day, whereby the facility load 121 with respect to the power generation amount of the fuel cell 50 The amount of power used on the day following the day is determined.

(4) In the above embodiment, the generated power amount acquisition unit 101 calculates the generated power amount in the fuel cell 50 based on the elapsed time since the start of use of the fuel cell system 30, based on the fuel cell deterioration tendency. . However, the calculation method of the electric power generation amount of the next day is not limited to this.
For example, the power generation amount acquisition unit 101 may estimate the power generation amount of the next day based on the power generation amount of the fuel cell 50 on the day that is the day before the next day. For example, the amount of power generated by the fuel cell 50 on the day may be used as the amount of power generated on the next day. Alternatively, the average of the amount of power generated by the fuel cell 50 in a predetermined period such as one week from the day before the next day may be used as the amount of power generated the next day.
Besides, regardless of the deterioration tendency of the fuel cell 50, the amount of electric power generated by the fuel cell 50 may be constant. In this case, the generated energy acquisition unit 101 may be omitted in the control unit 300c.

  (5) In the above embodiment, the power consumption acquisition unit 102 acquires the power consumption based on the daily usage trend of the power consumption used by the facility on a single day. The amount of power used may be constant regardless of the usage trend. In this case, the power consumption acquisition unit 102 may be omitted in the control unit 300c.

  (6) In the above-described embodiment, the power sale desired price is calculated in consideration of the power generation cost required for the fuel cell 50 to generate the power sale possible amount. However, the selling price may be fixed regardless of the generation cost.

(7) In the above embodiment, the weather forecast information includes weather forecast information including temperature forecast and warning forecast, and foreign matter forecast information. However, the forecast information is not limited to these. For example, the weather forecast information may further include the next day's humidity forecast.
Further, in the above embodiment, when the air temperature is equal to or higher than the air temperature threshold, the case where an alarm is issued and the case where the amount of foreign matter is equal to or higher than the foreign matter threshold are included as suppression information. However, the suppression information is not limited to these. For example, the suppression information may include the case where the humidity is equal to or less than the humidity threshold.

  For example, when the humidity is low, the dew point of the flue gas is lowered, and the flue gas can not be sufficiently cooled to condense the moisture in the flue gas. Therefore, the water self-sustaining operation can not be sufficiently recovered from the combustion exhaust gas, and when the water can not be supplied from the outside, there is a possibility that the fuel cell system 30 breaks down. Therefore, for example, it is assumed that the suppression information acquisition unit 103 has acquired information that the state in which the humidity is the humidity threshold (for example, 30%) or less continues for, for example, three hours or more as forecast information on the next day. In this case, the suppression information acquisition unit 103 acquires this as suppression information, assuming that the power generation in the fuel cell 50 is suppressed for three hours. The power sale amount calculation unit 104 calculates a power generation suppression amount based on the suppression information.

  (8) In the above embodiment, the suppression information acquisition unit 103 acquires suppression information from the forecast information, and the power sale amount calculation unit 104 calculates the power generation suppression amount based on the suppression information. However, the suppression information acquisition unit 103 may acquire the suppression information and calculate the power generation suppression amount based on the suppression information. Then, the power generation suppression amount calculated by the suppression information acquisition unit 103 is output to the power sale amount calculation unit 104, and the power sale amount calculation unit 104 calculates the power sale available amount in consideration of the power generation suppression amount.

(9) In the above embodiment, the power generation amount, the power generation suppression amount, the power consumption amount, the power sale available amount, etc. are calculated on the basis of the next day, but the target date for calculating these is not limited to the next day. It may be a future day. For example, the power generation amount, the power generation suppression amount, the power consumption amount, the power sale available amount, and the like may be calculated on the basis of the next day, and the power generation in the fuel cell 50 may be controlled based on the power sale price the next day. However, by setting the target date for calculating the available sale amount as the next day, the available sale amount can be calculated based on the forecast information of the next day. Since the forecast information is the information of the next day, the forecast accuracy is high, the more accurate available sales amount can be calculated, and each fuel cell system 30 can be operated considering the profit and loss more accurately.
(10) In the above embodiment, the forecast information includes at least one of weather forecast information including at least one of temperature forecast and alarm forecast and foreign matter forecast information for the next day of each place. However, the forecast information is not limited to this, and may include, for example, a warning of the next day or a forecast thereof as weather information. Further, the forecast information may include, for example, information in which the amount of insolation such as insolation intensity and insolation time of the next day is predicted. Therefore, the forecast information may include the contents of the warning, the forecast time, the solar radiation intensity exceeding the predetermined threshold, the solar radiation time exceeding the predetermined threshold, and the like on the next day.
In addition, in the above-mentioned embodiment, although a heavy rain warning, a lightning warning, and a storm warning are mentioned as an example as a warning, a warning is not limited to this. For example, the alarm may include various alarms such as flood alarm, storm snow alarm, heavy snow alarm, wave alarm, storm surge alarm and earthquake alarm.

  Note that the configurations disclosed in the above-described embodiment (including the other embodiments, and the same hereinafter) can be applied in combination with the configurations disclosed in the other embodiments as long as no contradiction arises. The embodiment disclosed in the present specification is an exemplification, and the embodiment of the present invention is not limited thereto, and can be appropriately modified without departing from the object of the present invention.

10: forecast information management device 20: sale of electricity management device 30: fuel cell system 35: commercial power grid 40: network 50: fuel cell 100: sale of electricity control system 101: power generation amount acquisition unit 102: power consumption acquisition unit 103 : Suppression information acquisition unit 104: Electric power selling amount calculation unit 105: Operation control unit

Claims (9)

A forecast information management device that manages forecast information including at least one of weather forecast information including at least one of temperature forecast and warning forecast, and foreign matter forecast information on forecast of foreign matter included in the atmosphere;
At least one fuel cell system including a fuel cell that receives a supply of fuel and generates power;
Is a power sale control system communicably connected via a network,
The power sale control system
Among the generated electric energy generated by the fuel cell, the past electric energy used in the facility where the fuel cell supplies the generated electric power is learned, and based on the learning result, it is one day from the next day to the present. A power consumption acquisition unit for acquiring power consumption predicted on a future day;
A suppression information acquisition unit that acquires, from the forecast information, suppression information related to suppression of power generation in the fuel cell for the future day;
An amount of power generation suppression in which power generation in the fuel cell is suppressed based on the suppression information in the future day from power generation amount in the fuel cell predicted in the future day, and use predicted in the future day A power sale amount calculation unit that calculates the power sale available amount, which is the amount of power saleable on the future day, by subtracting the amount of power;
Power sale control system provided with.   The power sale control system estimates a deterioration tendency of the power generation amount due to aging of the fuel cell, and acquires a power generation amount acquisition unit that acquires the power generation amount of the fuel cell on the future day based on the deterioration trend The power sale control system according to claim 1, further comprising:   The power consumption acquisition unit learns daily usage trends of past power consumption in a facility where the fuel cell supplies generated power, and based on the learned usage trends, uses the power consumption on the future day The power sale control system according to claim 1 or 2, which is acquired. The power sales amount calculation unit
When the suppression information indicates that the state in which the air temperature on the future day is the air temperature threshold or more continues for the first time, the first time is based on the suppression of the power generation in the fuel cell. ,
In the case where the suppression information indicates a state in which an alarm on the future day is issued continues for a second time, the second time is based on suppression of power generation in the fuel cell.
When the suppression information indicates that the state in which the amount of foreign matter on the future day is equal to or greater than the foreign matter threshold continues for a third time, the power generation in the fuel cell is suppressed for the third time. The power sale control system according to any one of claims 1 to 3, wherein the power generation suppression amount is calculated based on at least one of: The power sale control system manages a power sale price of electric power, receives the power sale available amount on the future day from the power sale amount calculation unit, and outputs a power sale price for the power sale available amount. A device is further communicably connected via the network,
The power sale control system
Operation control that acquires the selling price for the available sale amount on the future day from the sale management device, and controls the power generation of the fuel cell for the future day according to the sale price and the available sale amount The power sale control system according to any one of claims 1 to 4, further comprising a part. The operation control unit
If the selling price is equal to or more than the selling price with respect to the available sale amount, the power generation in the fuel cell is controlled to satisfy the available sale amount;
If the selling price is less than the selling price with respect to the available sale amount, the power generation by the fuel cell is controlled so that the power generated by the fuel cell is not reversed to the commercial power system. The power sale control system according to Item 5.   7. The power sale control system according to claim 6, wherein the power sale amount calculation unit sets the power sale desired price based on a power generation cost required for the fuel cell to generate the power sale possible amount.   The power sale control system according to any one of claims 1 to 7, wherein the future date is the next day to the present. A forecast information management device that manages forecast information including at least one of weather forecast information including at least one of temperature forecast and warning forecast, and foreign matter forecast information on forecast of foreign matter included in the atmosphere;
At least one fuel cell system including a fuel cell that receives a supply of fuel and generates power;
A power sale control method in a power sale control system communicably connected via a network,
Among the generated electric energy generated by the fuel cell, the past electric energy used in the facility where the fuel cell supplies the generated electric power is learned, and based on the learning result, it is one day from the next day to the present. Obtain the expected power consumption in the future day,
The suppression information related to the suppression of power generation in the fuel cell is acquired from the forecast information for the future day,
An amount of power generation suppression in which power generation in the fuel cell is suppressed based on the suppression information in the future day from power generation amount in the fuel cell predicted in the future day, and use predicted in the future day The electric power sale control method which calculates the electric power sale possible amount which is electric power amount which can be sold on the said future day by deducting with electric energy.

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