Energy Management Systems

Abstract

To provide an energy management system capable of easily and efficiently realizing energy generation and energy supply.SOLUTION: An energy management system includes an information acquisition unit and a planning unit. The information acquisition unit acquires information including electric power information on an electric power supply unit that obtains electric power and supplies the obtained electric power, gas conversion information on a plurality of electric power-gas conversion units that generate gas using the electric power supplied from the electric power supply unit, and gas demand information on a plurality of gas demand units to which gas is supplied from the plurality of electric power-gas conversion units. The planning unit prepares an electric power distribution plan with respect to electric power to be distributed from the electric power supply unit to the plurality of electric power-gas conversion units, and a gas distribution plan with respect to gas to be distributed from the plurality of electric power-gas conversion units to the plurality of gas demand units so that an evaluation value determined on the basis of the information acquired by the information acquisition unit becomes an optimal value.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] FIELD OF THE DISCLOSURE Embodiments of the present invention relate to an energy management system. [Background technology]

[0002] The energy management system is provided to stabilize the supply of energy. For example, the energy management system is configured to manage energy such as hydrogen energy by controlling the operation of a power-to-gas converter that generates gas such as hydrogen gas using power supplied from a power supply unit. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2018-142239 A [Patent Document 2] JP 2018-066549 A Summary of the Invention [Problem to be solved by the invention]

[0004] In order to efficiently generate energy, supply energy, etc., it is preferable that the energy management system manages the operation of each of the multiple power-to-gas conversion units by linking the multiple power-to-gas conversion units. However, in the past, the above-mentioned linkage was insufficient, and it was sometimes difficult to efficiently generate energy, supply energy, etc.

[0005] Therefore, an object of the present invention is to provide an energy management system that can easily realize efficient energy generation, energy supply, and the like. [Means for solving the problem]

[0006] An energy management system according to an embodiment includes an information acquisition unit and a planning unit. The information acquisition unit acquires information including procurement power information related to a power supply unit that procures power and supplies the procured power, gas conversion information related to a plurality of power-to-gas conversion units that generate gas using power supplied from the power supply unit, and gas demand information related to a plurality of gas demand units to which gas is supplied from the plurality of power-to-gas conversion units. The planning unit creates a power allocation plan related to power to be allocated from the power supply unit to the plurality of power-to-gas conversion units and a gas allocation plan related to gas to be allocated from the plurality of power-to-gas conversion units to the plurality of gas demand units, so that an evaluation value evaluated based on the information acquired by the information acquisition unit becomes an optimal value. [Brief description of the drawings]

[0007] [Figure 1] FIG. 1 is a block diagram showing a schematic overall configuration including an energy management system 1 according to the first embodiment. [Diagram 2] FIG. 2 is a block diagram that illustrates the energy management system 1 according to the first embodiment. [Diagram 3] FIG. 3 is a block diagram showing a schematic overall configuration including an energy management system 1 according to the second embodiment. [Figure 4] FIG. 4 is a block diagram illustrating an energy management system 1 according to the second embodiment. [Diagram 5] FIG. 5 is a diagram showing a schematic diagram of a planning period for which the planning unit 14 of the energy management system 1 according to the third embodiment creates a plan. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] First Embodiment [A] Overall configuration Fig. 1 is a block diagram showing a schematic diagram of an overall configuration including an energy management system 1 according to a first embodiment. In Fig. 1, solid arrows indicate the flow of power, dashed arrows indicate the flow of gas, and dashed lines indicate the flow of information.

[0009] [A-1] Power supply section 10a, 10b Each of the multiple power supply units 10a, 10b is provided to procure power and supply the procured power. Each of the multiple power supply units 10a, 10b includes, for example, a power plant such as a thermal power plant or a renewable energy power plant. In addition, each of the multiple power supply units 10a, 10b may include a power storage device that stores power. Each of the multiple power supply units 10a, 10b is configured to supply power to each of the multiple power-to-gas conversion units 21a, 21b via, for example, a power grid interconnection line.

[0010] [A-2] Electric power / gas conversion units 21a, 21b The multiple power-to-gas conversion units 21a, 21b are provided to generate gas using power supplied from the multiple power supply units 10a, 10b. Each of the multiple power-to-gas conversion units 21a, 21b includes, for example, a hydrogen electrolysis device and a storage tank, and is configured such that the hydrogen electrolysis device generates hydrogen gas by electrolyzing water, and the storage tank stores the generated hydrogen gas. In addition, each of the multiple power-to-gas conversion units 21a, 21b may be configured to liquefy the hydrogen gas generated as described above and store the liquefied hydrogen. The multiple power-to-gas conversion units 21a, 21b are configured to supply gas to each of the multiple gas demand units 30a, 30b via, for example, a gas distribution network.

[0011] [A-3] Gas demand section 30a, 30b The gas demand units 30a, 30b are configured to consume the gas generated by the power-to-gas conversion units 21a, 21b. The gas demand units 30a, 30b are configured to perform heating or the like by burning the gas, for example.

[0012] [A-4] Energy Management System 1 The energy management system 1 is configured to receive information from each of the multiple power supply units 10a, 10b, the multiple power-to-gas conversion units 21a, 21b, and the multiple gas demand units 30a, 30b, and to output information to each of these units.

[0013] [B] Configuration of Energy Management System 1 FIG. 2 is a block diagram that illustrates the energy management system 1 according to the first embodiment.

[0014] The energy management system 1 of this embodiment includes an information acquisition unit 11 and a planning unit 14, as shown in FIG.

[0015] [B-1] Information acquisition section 11 In the energy management system 1, the information acquisition unit 11 is configured to acquire information including procurement power information SEn, gas conversion information PGn, and gas demand information DGn, as shown in Fig. 2. The information acquisition unit 11 includes, for example, a storage device such as a memory, and stores the information acquired as described above in the storage device.

[0016] The procured power information SEn is information SEa, SEb (see FIG. 1) related to the multiple power supply units 10a, 10b that procures power and supplies the procured power.

[0017] The gas conversion information PGn is information PGa, PGb (see FIG. 1) about a plurality of electric power-gas conversion units 21a, 21b that generate gas using electric power supplied from a plurality of electric power supply units 10a, 10b.

[0018] The gas demand information DGn is information DGa, DGb (see FIG. 1) relating to the multiple gas demand units 30a, 30b to which gas is supplied from the multiple electric power-gas conversion units 21.

[0019] [B-2] Planning Department 14 In the energy management system 1, the planner 14 is provided to create a power distribution plan X1 and a gas distribution plan X2, as shown in Fig. 2. The planner 14 includes a calculator, and creates the power distribution plan X1 and the gas distribution plan X2 by the calculator performing calculation processing using a program.

[0020] The power distribution plan X1 is a plan regarding power distribution from the multiple power supplying units 10a, 10b to the multiple electric power and gas conversion units 21a, 21b.

[0021] The gas distribution plan X2 is a plan regarding gas to be distributed from the multiple electric power / gas conversion units 21a and 21b to the multiple gas demand units 30a and 30b.

[0022] Although details will be described later, the planning unit 14 creates the power allocation plan X1 and the gas allocation plan X2 so that the evaluation value evaluated based on the information acquired by the information acquisition unit 11 becomes an optimal value. Here, the power allocation plan X1 and the gas allocation plan X2 are created for a determined period. For example, the power allocation plan X1 and the gas allocation plan X2 are created for a future period.

[0023] Then, the power allocation plan X1 created by the planner 14 is output to an external control device (not shown) that controls the allocation of power from the multiple power supply units 10a, 10b to the multiple power and gas conversion units 21a, 21b. As a result, the multiple power supply units 10a, 10b each allocate power to the multiple power and gas conversion units 21a, 21b according to the power allocation plan X1. That is, the power used by the power and gas conversion unit 21a to generate gas is supplied from each of the multiple power supply units 10a, 10b to the power and gas conversion unit 21a according to the power allocation plan X1. Similarly, the power used by the power and gas conversion unit 21b to generate gas is supplied from each of the multiple power supply units 10a, 10b to the power and gas conversion unit 21b according to the power allocation plan X1.

[0024] In addition, the gas distribution plan X2 created by the planner 14 is output to an external control device that controls the distribution of gas from the multiple electric power / gas converters 21a and 21b to the multiple gas demand units 30a and 30b. As a result, the multiple electric power / gas converters 21a and 21b distribute gas to the multiple gas demand units 30a and 30b according to the gas distribution plan X2. That is, the gas demanded by the gas demand unit 30a is supplied from each of the multiple electric power / gas converters 21a and 21b to the gas demand unit 30a according to the gas distribution plan X2. Similarly, the gas demanded by the gas demand unit 30b is supplied from each of the multiple electric power / gas converters 21a and 21b to the gas demand unit 30b according to the gas distribution plan X2.

[0025] [C] Planning method An example of a method for creating the power distribution plan X1 and the gas distribution plan X2 in the planning unit 14 of the energy management system 1 will be described below.

[0026] When creating the power allocation plan X1 and the gas allocation plan X2, the planner 14 first calculates an evaluation value EV based on the information acquired by the information acquirer 11.

[0027] The evaluation value EV is, for example, a cost evaluation value COST relating to cost. The cost evaluation value COST is calculated, for example, by the function shown in the following (Equation A1).

[0028] (Formula A1) EV=COST=Σ Vse(SEn)-ΣVpg(PGn)-Σ Vdg(DGn)

[0029] In formula A1, function Vse(SEn) is a function of procurement power information SEn(SEa,SEb) related to multiple power supply units 10n (n=a,b). For example, procurement power information SEn(SEa,SEb) is information on the amount of power (Wh) procured by multiple power supply units 10n, and function Vse(SEn) is a function related to the expenditure calculated by multiplying the amount of power (Wh) by the payment unit price (yen / Wh). Here, the payment unit price (yen / Wh) is set according to the power procurement price, wheeling charge, levy, market fee, etc. The amount of power (Wh) procured by multiple power supply units 10n and the payment unit price (yen / Wh) may be predicted values. In formula A1, "Σ Vse(SEn)" indicates the sum of function Vse(SEa) of procurement power information SEa related to power supply unit 10a and function Vse(SEb) of procurement power information SEb related to power supply unit 10b.

[0030] In (Equation A1), the function Vpg(PGn) is a function of gas conversion information PGn(PGa, PGb) related to a plurality of power-to-gas conversion units 21n (n=a, b). For example, the gas conversion information PGn(PGa, PGb) is information on the amount of power (Wh) that the plurality of power-to-gas conversion units 21n sell to the supply-and-demand balancing market as DR (demand response), and the function Vpg(PGn) is a function related to the amount of income calculated by multiplying the amount of power (Wh) by the selling price (yen / Wh). The amount of power (Wh) and the selling price (yen / Wh) sold to the supply-and-demand balancing market may be predicted values. In (Equation A1), "Σ Vpg(PGn)" indicates the sum of the function Vpg(PGa) of the gas conversion information PGa related to the power-to-gas conversion unit 21a and the function Vpg(PGb) of the gas conversion information PGb related to the power-to-gas conversion unit 21b.

[0031] In (Equation A1), the function Vdg(DGn) is a function of gas demand information DGn(DGa, DGb) regarding the multiple gas demand units 30n (n=a, b). For example, the gas demand information DGn(DGa, DGb) is a function of the gas demand amount (m 3 ), and the function Vdg(DGn) is, for example, the gas demand (m3 ) to gas sales price (yen / m 3 ) is a function of the amount of income calculated by integrating the gas demand (m 3 ) and gas sales price (yen / m 3 ) may be a predicted value. In (Equation A1), "Σ Vdg(DGn)" indicates the sum of the function Vdg(DGa) of the gas demand information DGa related to the gas demand unit 30a and the function Vdg(DGb) of the gas demand information DGb related to the gas demand unit 30a.

[0032] As in (Equation A1), the function used in the evaluation value EV may be updated as appropriate, for example, according to the results of learning.

[0033] The evaluation value EV is calculated for each of the planned unit times TU for carrying out the power distribution plan X1 and the gas distribution plan X2, for example. The calculation of the evaluation value is performed for each of a plurality of distribution patterns that combine a plurality of power distribution patterns for distributing power from a plurality of power supply units 10a, 10b to a plurality of power-to-gas conversion units 21a, 21b, and a gas distribution pattern for distributing gas from a plurality of power-to-gas conversion units 21a, 21b to a plurality of gas demand units 30a, 30b. The power distribution pattern is determined in consideration of the efficiency of power supply, and the gas distribution pattern is determined in consideration of the efficiency of gas supply. Each distribution pattern is determined in consideration of various factors such as regional characteristics, weather conditions, the status of the power system (such as free capacity), and the status of the gas distribution network (such as traffic congestion during delivery).

[0034] When the evaluation value EV is the cost evaluation value COST, the optimal value of the cost evaluation value COST is the minimum value indicating that the cost is the minimum. Therefore, the planner 14 selects, from among the multiple allocation patterns, the allocation pattern in which the cost evaluation value COST calculated as above is the minimum value, as the power allocation plan X1 and the gas allocation plan X2.

[0035] [D] Summary As described above, in the energy management system 1 of this embodiment, the evaluation value EV is evaluated for a plurality of distribution patterns based on information including the procurement power information SEn, the gas conversion information PGn, and the gas demand information DGn, and among the plurality of distribution patterns for which the evaluation value EV is calculated, the distribution pattern for which the evaluation value EV is the optimum value is created as the power distribution plan X1 and the gas distribution plan X2. When the evaluation value EV is the cost evaluation value COST as in this embodiment, the distribution pattern for which the cost evaluation value COST is the minimum value is created as the power distribution plan X1 and the gas distribution plan X2. Therefore, in this embodiment, energy generation, energy supply, etc. can be performed efficiently from the viewpoint of cost.

[0036] [E] Variation [E-1] Variation 1-1 In the above embodiment, the evaluation value EV is the cost evaluation value COST, but this is not limiting. The evaluation value EV may be an environment evaluation value ENVR relating to the environment.

[0037] The environmental evaluation value ENVR is calculated, for example, by the function shown in the following (Equation A2).

[0038] (Formula A2) EV=ENVR=Σ Yse(SEn)-Σ Ypg(PGn)-Σ Ydg(DGn)

[0039] In formula A2, function Yse(SEn) is a function of procurement power information SEn(SEa,SEb) related to multiple power supply units 10n (n=a,b). For example, procurement power information SEn(SEa,SEb) is information on the type and amount of power (Wh) procured by multiple power supply units 10n, and function Yse(SEn) is a function related to environmental load calculated by, for example, multiplying the amount of power (Wh) of power generated from energy other than renewable energy by a CO2 emission coefficient corresponding to the power generation method of that power, and multiplying the amount of power (Wh) of power generated from renewable energy by zero. In formula A2, "Σ Yse(SEn)" indicates the sum of function Yse(SEa) of procurement power information SEa related to power supply unit 10a and function Yse(SEb) of procurement power information SEb related to power supply unit 10b.

[0040] In (Equation A2), the function Ypg(PGn) is a function of gas conversion information PGn(PGa, PGb) related to a plurality of electric power / gas conversion units 21n (n=a, b). For example, the gas conversion information PGn(PGa, PGb) is information on the amount of electric power (Wh) that the plurality of electric power / gas conversion units 21n sell to the supply / demand adjustment market as DR (demand response). The function Vpg(PGn) is a function related to the environmental load, for example, which obtains the value of absorbing electric power generated by renewable energy and preventing the suppression of the power generation output by renewable energy by implementing an upward DR. In addition, the function Vpg(PGn) may be a function related to the environmental load which obtains the amount of CO2 emissions reduced by substituting the role of the electric power supply / demand adjustment performed by a thermal power plant. In addition, in (Equation A2), "Σ Ypg(PGn)" indicates the sum of the function Ypg(PGa) of the gas conversion information PGa related to the power-gas conversion unit 21a and the function Ypg(PGb) of the gas conversion information PGb related to the power-gas conversion unit 21b.

[0041] In (Equation A2), the function Ydg(DGn) is a function of the gas demand information DGn(DGa, DGb) regarding the multiple gas demand units 30n (n=a, b). For example, the gas demand information DGn(DGa, DGb) is a function of the gas demand amount (m 3 ), and the function Ydg(DGn) is, for example, the gas demand (m 3 ) is a function related to the environmental load that calculates the amount of CO2 emissions reduced depending on the amount of gas demand information DGa related to the gas demand unit 30a. In (Equation A2), "Σ Ydg(DGn)" indicates the sum of the function Ydg(DGa) of the gas demand information DGa related to the gas demand unit 30a and the function Ydg(DGb) of the gas demand information DGb related to the gas demand unit 30a.

[0042] When the evaluation value EV is the environmental evaluation value ENVR, the optimal value of the environmental evaluation value ENVR is the minimum value indicating that the environmental load is the minimum. Therefore, the planner 14 selects, from among the multiple distribution patterns, the distribution pattern in which the environmental evaluation value ENVR calculated as above is the minimum value, as the power distribution plan X1 and the gas distribution plan X2.

[0043] Furthermore, the evaluation value EV may be an added value of the cost evaluation value COST and the environmental evaluation value ENVR, as shown in the following formula (A3): In calculating the evaluation value EV, each of the cost evaluation value COST and the environmental evaluation value ENVR may be multiplied by a weighting coefficient.

[0044] (Formula A3) EV=COST+ENVR

[0045] [E-2] Variation 1-2 In the above embodiment, a case has been described in which a plurality of power supply units 10a, 10b, a plurality of power-to-gas conversion units 21a, 21b, and a plurality of gas demand units 30a, 30b actually exist, and the information acquisition unit 11 of the energy management system 1 acquires information from each of these actually existing units, but this is not limited to the above.

[0046] The multiple power supply units 10a, 10b, the multiple power-to-gas conversion units 21a, 21b, and the multiple gas demand units 30a, 30b may be a virtual model, and the information acquired by the information acquisition unit 11 may include virtual data related to the virtual model. This allows a simulation related to the virtual model to be executed. As a result, for example, in the design stage, it is possible to verify the introduction of unnecessary equipment, insufficient equipment capacity, insufficient power transmission capacity, insufficient communication capacity, and the like. In addition, by examining the virtual model assuming that an abnormality has occurred, it is possible to grasp problems in advance.

[0047] [E-3] Other variations In addition, in the present embodiment, the case where the power is supplied from each of the multiple power supply units 10a, 10b to each of the multiple power-gas conversion units 21a, 21b has been described, but this is not limited to the above. Even in the case where power is distributed and supplied from a single power supply unit (for example, 10a) to each of the multiple power-gas conversion units 21a, 21b, the plan can be made in the same manner as in the above embodiment.

[0048] <Second embodiment> [A] Configuration Fig. 3 is a block diagram showing a schematic overall configuration including an energy management system 1 according to the second embodiment. Fig. 4 is a block diagram showing a schematic energy management system 1 according to the second embodiment.

[0049] As shown in Figures 3 and 4, the energy management system 1 of this embodiment is configured to receive information from and output information to a plurality of gas-to-electricity reconversion units 22a, 22b and a plurality of electric power demand units 40a, 40b, in addition to a plurality of electric power supply units 10a, 10b, a plurality of electric power gas conversion units 21a, 21b, and a plurality of gas demand units 30a, 30b, unlike the first embodiment. Except for this point and related points, this embodiment is similar to the first embodiment. Therefore, explanations of overlapping matters will be omitted as appropriate.

[0050] [A-1] Gas-to-electricity reconversion units 22a, 22b The gas-to-electricity reconversion units 22a, 22b are supplied with gas generated in the power-to-gas conversion units 21a, 21b in addition to the gas demand units 30a, 30b. The gas-to-electricity reconversion units 22a, 22b are provided to reconvert the gas generated in the power-to-gas conversion units 21a, 21b into electric power. The gas-to-electricity reconversion units 22a, 22b include, for example, a fuel cell device, and are configured to generate electric power using hydrogen gas supplied from the power-to-gas conversion units 21a, 21b. Each of the gas-to-electricity reconversion units 22a, 22b is configured to supply electric power to each of the power demand units 40a, 40b.

[0051] [A-2] Power demand section 40a, 40b The plurality of power demand units 40a, 40b are supplied with power reconverted in the plurality of gas power reconverters 22a, 22b. The plurality of power demand units 40a, 40b include, for example, electric devices driven by electric power.

[0052] [A-3] Energy Management System 1 As shown in FIG. 4, the energy management system 1 includes an information acquisition unit 11 and a planning unit 14.

[0053] However, in the energy management system 1 of this embodiment, the information acquisition unit 11 is configured to acquire information including gas-to-power reconversion information GPn and power demand information DEn in addition to procurement power information SEn, gas conversion information PGn, and gas demand information DGn, as shown in Figure 4.

[0054] The gas-to-power reconversion information GPn is information GPa, GPb (see FIG. 3) relating to the plurality of gas-to-power reconversion units 22a, 22b that reconvert the gas generated in the plurality of power-to-gas conversion units 21a, 21b into power.

[0055] The electric power demand information DEn is information DEa, DEb (see FIG. 3) on the plurality of electric power demand units 40a, 40b to which electric power reconverted in the plurality of gas electric power reconverters 22a, 22b is supplied.

[0056] In the energy management system 1 of the present embodiment, the planner 14 is provided for creating a reconverted power distribution plan X3 in addition to the power distribution plan X1 and the gas distribution plan X2, as shown in FIG.

[0057] In this embodiment, the gas distribution plan X2 includes a plan for gas to be distributed from the multiple power-to-gas conversion units 21a, 21b to the multiple gas demand units 30a, 30b, as well as a plan for gas to be distributed from the multiple power-to-gas conversion units 21a, 21b to the multiple gas-to-power reconversion units 22a, 22b.

[0058] The reconverted power distribution plan X3 is a plan regarding power to be distributed from the multiple gas power reconverters 22a and 22b to the multiple power demand units 40a and 40b.

[0059] In this embodiment, the planner 14 also creates the power allocation plan X1, the gas allocation plan X2, and the reconverted power allocation plan X3 so that the evaluation value evaluated based on the information acquired by the information acquisition unit 11 becomes an optimal value. Here, the power allocation plan X1, the gas allocation plan X2, and the reconverted power allocation plan X3 are created for a determined period. For example, the plan is executed for a future period.

[0060] Then, the power allocation plan X1 created by the planner 14 is output to an external control device (not shown) in the same manner as in the first embodiment. As a result, each of the multiple power supply units 10a, 10b allocates power to each of the multiple power-to-gas converters 21a, 21b in accordance with the power allocation plan X1.

[0061] The gas distribution plan X2 created by the planner 14 is output to an external control device that controls the distribution of gas from the electric power / gas converters 21a, 21b to the gas demand units 30a, 30b and the gas / electricity reconverters 22a, 22b. As a result, the electric power / gas converters 21a, 21b each distribute gas to the gas demand units 30a, 30b and the gas / electricity reconverters 22a, 22b in accordance with the gas distribution plan X2.

[0062] The reconversion power allocation plan X3 created by the planner 14 is output to an external control device that controls the allocation of power from the multiple gas power reconverters 22a, 22b to the multiple power demand units 40a, 40b. As a result, each of the multiple gas power reconverters 22a, 22b allocates power to each of the multiple power demand units 40a, 40b in accordance with the reconversion power allocation plan X3.

[0063] [B] Planning method An example of a method for creating the power allocation plan X1, the gas allocation plan X2, and the reconverted power allocation plan X3 in the planner 14 of the energy management system 1 of this embodiment will be described below.

[0064] When creating the power allocation plan X1, the gas allocation plan X2, and the reconverted power allocation plan X3, the planner 14 first calculates an evaluation value EV based on the information acquired by the information acquirer 11.

[0065] The evaluation value EV is, for example, a cost evaluation value COST relating to cost, as in the first embodiment. In this embodiment, the cost evaluation value COST is calculated, for example, by the function shown in the following (Equation A2).

[0066] (Formula B1) EV=COST=Σ Vse(SEn)-ΣVpg(PGn)-Σ Vdg(DGn)-Σ Vgp(GPn)-Σ Vde(DEn)

[0067] In (Equation B1), the function Vse(SEn), the function Vpg(PGn), and the function Vdg(DGn) are similar to those in (Equation A1) used in the first embodiment.

[0068] In (Equation B1), the function Vgp(GPn) is a function of gas power reconversion information GPn(GPa, GPb) related to multiple gas power reconversion units 22n (n=a, b). For example, the gas power reconversion information GPn(GPa, GPb) is information on the amount of power (Wh) sold by multiple gas power reconversion units 22n to the supply and demand adjustment market as DR (demand response), and the function Vgp(GPn) is a function related to the amount of income calculated by multiplying the amount of power (Wh) by the sales price (yen / Wh). The amount of power (Wh) and the sales price (yen / Wh) sold to the supply and demand adjustment market may be predicted values. In (Equation A2), "Σ Vgp(GPn)" indicates the sum of the function Vgp(GPa) of the gas power reconversion information GPa related to the gas power reconversion unit 22a and the function Vgp(GPb) of the gas power reconversion information GPa related to the gas power reconversion unit 22b.

[0069] In (Equation B1), the function Vde(DEn) is a function of the power demand information DEn(DEa, DEb) regarding the multiple power demand units 40n (n=a, b). For example, the power demand information DEn(DEa, DEb) is information on the amount of power (Wh) that the multiple power demand units 40n sell to the supply and demand adjustment market as DR (demand response), and the function Vde(DEn) is a function related to the amount of income calculated by multiplying the amount of power (Wh) by the selling price (yen / Wh). The amount of power (Wh) and the selling price (yen / Wh) sold to the supply and demand adjustment market may be predicted values. In (Equation A2), "Σ Vde(DEn)" indicates the sum of the function Vde(DEa) of the power demand information DEa regarding the power demand unit 40a and the function Vde(DEa) of the power demand information DEb regarding the power demand unit 40b.

[0070] The evaluation value EV is calculated for each of the planned unit times TU for performing the power distribution plan X1, the gas distribution plan X2, and the reconverted power distribution plan X3, for example. The calculation of the evaluation value is performed for each of a plurality of distribution patterns that combine a plurality of power distribution patterns that distribute power from a plurality of power supply units 10a, 10b to a plurality of power gas conversion units 21a, 21b, a gas distribution pattern that distributes gas from a plurality of power gas conversion units 21a, 21b to a plurality of gas demand units 30a, 30b and a plurality of gas power reconversion units 22a, 22b, and a plurality of power distribution patterns that distribute power from a plurality of gas power reconversion units 22a, 22b to a plurality of power demand units 40a, 40b. The power distribution pattern is determined in consideration of the efficiency of the power supply, and the gas distribution pattern is determined in consideration of the efficiency of the gas supply.

[0071] When the evaluation value EV is the cost evaluation value COST, the optimal value of the cost evaluation value COST is the minimum value indicating that the cost is the minimum. Therefore, the planner 14 selects, from among the multiple allocation patterns, the allocation patterns in which the cost evaluation value COST calculated as above is the minimum value as the power allocation plan X1, the gas allocation plan X2, and the reconverted power allocation plan X3.

[0072] [C] Summary As described above, in the energy management system 1 of the present embodiment, the procurement power information SEn, the gas conversion information PGn, the gas demand information DGn, the gas-to-electricity reconversion information (GP), and the power demand information (DE n ), an evaluation value EV is evaluated for a plurality of distribution patterns, and among the plurality of distribution patterns for which the evaluation value EV is calculated, an distribution pattern for which the evaluation value EV is optimal is created as the power distribution plan X1, the gas distribution plan X2, and the reconverted power distribution plan X3. When the evaluation value EV is the cost evaluation value COST as in this embodiment, an distribution pattern for which the cost evaluation value COST is the smallest is created as the power distribution plan X1, the gas distribution plan X2, and the reconverted power distribution plan X3. Therefore, in this embodiment, energy generation, energy supply, and the like can be performed efficiently from the viewpoint of cost.

[0073] [D] Variation [D-1] Variation 2-1 In the above embodiment, the evaluation value EV is the cost evaluation value COST, but this is not limiting. The evaluation value EV may be the environment evaluation value ENVR related to the environment, as in the first embodiment.

[0074] In this embodiment, the environment evaluation value ENVR is calculated, for example, by the function shown in the following (Equation B2).

[0075] (Formula B2) EV=ENVR=Σ Yse(SEn)-Σ Ypg(PGn)-Σ Ydg(DGn)-Σ Ygp(GPn)-Σ Yde(DEn)

[0076] In (Equation B2), the functions Yse(SEn), Ypg(PGn), and Ydg(DGn) are similar to those in (Equation A2) used in the first embodiment.

[0077] In (Equation B2), the function Ygp(GPn) is a function of gas power reconversion information GPn(GPa, GPb) related to multiple gas power reconversion units 22n (n=a, b). For example, the gas power reconversion information GPn(GPa, GPb) is information on the amount of power (Wh) of electricity sold to the supply and demand adjustment market by multiple gas power reconversion units 22n as DR (demand response). The function Ygp(GPn) is a function related to the environmental load that calculates the amount of CO2 emissions reduced by substituting the role of adjusting the supply and demand of electricity performed at a thermal power plant. In (Equation B2), "ΣYgp(GPn)" indicates the sum of the function Ygp(GPa) of the gas power reconversion information GPa related to the gas power reconversion unit 22a and the function Ygp(GPb) of the gas power reconversion information GPb related to the gas power reconversion unit 22b.

[0078] In (Equation B2), the function Yde(DEn) is a function of power demand information DEn(DEa, DEb) related to a plurality of power demand units 40n (n=a, b). For example, the power demand information DEn(DEa, DEb) is information on the amount of power (Wh) of power sold by the plurality of power demand units 40n to the supply and demand adjustment market as DR (demand response). The function Yde(DEn) is a function related to the environmental load, for example, which obtains the value of absorbing power generated by renewable energy and preventing the suppression of power generation output by renewable energy by implementing an upward DR. In addition, the function Yde(DEn) may be a function related to the environmental load which obtains the amount of CO2 emissions reduced by substituting for the role of power supply and demand adjustment performed by a thermal power plant. In addition, in (Equation B2), "ΣYde(DEn)" indicates the sum of the function Yde(DEa) of the power demand information DEa related to the power demand unit 40a and the function Yde(DEb) of the power demand information DEb related to the power demand unit 40b.

[0079] When the evaluation value EV is the environmental evaluation value ENVR, the optimal value of the environmental evaluation value ENVR is the minimum value indicating that the environmental load is the minimum. Therefore, the planner 14 selects, from among the multiple distribution patterns, the distribution pattern in which the environmental evaluation value ENVR calculated as above is the minimum value, as the power distribution plan X1, the gas distribution plan X2, and the reconverted power distribution plan X3.

[0080] In this embodiment, the evaluation value EV may be the sum of the cost evaluation value COST and the environmental evaluation value ENVR, as already shown in formula (A3). In calculating the evaluation value EV, each of the cost evaluation value COST and the environmental evaluation value ENVR may be multiplied by a weighting coefficient.

[0081] [D-2] Variation 2-2 In the above embodiment, a case has been described in which the information acquisition unit 11 of the energy management system 1 acquires information from each of the actual power supply units 10a, 10b, the power-to-gas conversion units 21a, 21b, the gas demand units 30a, 30b, the gas-to-electricity reconversion units 22a, 22b, and the power demand units 40a, 40b exist, but this is not limited thereto. In the present embodiment, each unit may be a virtual model, and the information acquired by the information acquisition unit 11 may include virtual data related to the virtual model.

[0082] [D-3] Variation 2-3 In this embodiment, the case where power is supplied from the multiple gas power reconverters 22a, 22b to the multiple power demand units 40a, 40b has been described, but the present invention is not limited to this. Even in the case where power is allocated and supplied from a single gas power reconverter (e.g., 22a) to each of the multiple power demand units 40a, 40b, a plan can be made similarly to the above embodiment.

[0083] <Third embodiment> [A] Planning period FIG. 5 is a diagram showing a schematic diagram of a planning period for which the planning unit 14 of the energy management system 1 according to the third embodiment creates a plan.

[0084] In the above embodiment, the planning period PT for which the planning unit 14 (see FIGS. 2 and 4) creates a plan is a period PT1 in the future from the time t0 when the plan is created.

[0085] However, in this embodiment, unlike the above embodiment, the planning period PT includes a period PT2 in the past from the time of creating the plan in addition to a period PT1 in the future from the time of creating the plan. Here, the future period PT1 includes a plurality of planning unit times TU between the time t0 of creating the plan and a future time tf. The past period PT2 includes a plurality of planning unit times TU between the time t0 of creating the plan and a past time tp. Then, the planning unit 14 creates a plan for each of the plurality of planning unit times TU included in the future period PT1 and the past period PT2. Unlike the case of the planning unit time TU included in the future period PT1, the planning unit 14 creates a plan for the planning unit time TU included in the past period PT2 using performance data when it was actually performed in the past period PT2. The performance data is acquired in a performance acquisition time (e.g., 1 second) shorter than the planning unit time TU (e.g., 30 minutes). For this reason, the planning unit 14 creates a plan for the past period PT2, for example, by averaging a plurality of performance data acquired for each performance acquisition time in the planning unit time TU in the past period PT2.

[0086] [B] Summary As described above, in this embodiment, the planner 14 creates a plan for a planning period PT including a period PT1 in the future than the time t0 when the plan is created and a period PT2 in the past than the time t0 when the plan is created. As described above, in this embodiment, the future period PT1 and the past period PT2 are planned in the same planning unit time TU. Therefore, in this embodiment, the same data processing can be performed on both the plan for the future period PT1 and the plan for the past period PT2, and redundant processing is not required. Also, in this embodiment, the plan for the past period PT2 is created using actual data, so there is no need to check whether it matches the plan when processing the data.

[0087] <Other> Although some embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and spirit of the invention, and are included in the scope of the invention and its equivalents described in the claims. [Explanation of symbols]

[0088] 1: energy management system, 10a: power supply unit, 10b: power supply unit, 11: information acquisition unit, 14: planning unit, 21a: power gas conversion unit, 21b: power gas conversion unit, 22a: gas power reconversion unit, 22b: gas power reconversion unit, 30a: gas demand unit, 30b: gas demand unit, 40a: power demand unit, 40b: power demand unit, DEa: power demand information, DEb: power demand information, DGa: gas demand information, DGb: gas demand information, GPa: gas power reconversion information, GPb: gas power reconversion information, PGa: gas conversion information, PGb: gas conversion information, PT: planning period, PT1: period, PT2: period, SEa: procurement power information, SEb: procurement power information, X1: power distribution plan, X2: gas distribution plan, X3: reconverted power distribution plan

Claims

1. an information acquisition unit that acquires information including procured power information related to a power supply unit that procures power and supplies the procured power, gas conversion information related to a plurality of power-to-gas conversion units that generate gas using the power supplied from the power supply unit, and gas demand information related to a plurality of gas demand units to which gas is supplied from the plurality of power-to-gas conversion units; a planning unit that creates a power allocation plan for power to be allocated from the power supply unit to the plurality of power-gas conversion units and a gas allocation plan for gas to be allocated from the plurality of power-gas conversion units to the plurality of gas demand units so that an evaluation value evaluated based on the information acquired by the information acquisition unit becomes an optimal value; having Energy management systems.

2. The power supply unit is a plurality of power supply units, The planning unit creates a plan regarding power to be distributed from the plurality of power supply units to the plurality of power gas conversion units as the power distribution plan. The energy management system of claim 1 .

3. The information acquisition unit acquires, as the information, gas-to-electricity reconversion information related to a gas-to-electricity reconversion unit that reconverts the gas generated in the electric power-to-electricity conversion unit into electric power; The planning unit creates a gas distribution plan, which is a plan regarding gas to be distributed from the electric power / gas conversion unit to the gas demand unit and the gas / electricity reconversion unit. The energy management system according to claim 1 or 2.

4. The information acquisition unit acquires, as the information, power demand information related to a plurality of power demand units to which the power reconverted by the gas power reconversion unit is supplied, the planning unit creates a reconverted power allocation plan for power to be allocated from the gas power reconverter to the plurality of power demand units so that an evaluation value evaluated based on the information acquired by the information acquisition unit becomes an optimal value. The energy management system of claim 3 .

5. The evaluation value includes an evaluation value related to cost. The energy management system according to any one of claims 1 to 4.

6. The evaluation value includes an evaluation value regarding an impact on the environment. The energy management system according to any one of claims 1 to 5.

7. The planning unit creating the plan for a planning period including a future period from the time of creating the plan and a past period from the time of creating the plan; The energy management system according to any one of claims 1 to 6.

8. The information acquired by the information acquisition unit includes virtual data. An energy management system according to any one of claims 1 to 7.

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