JP5004916B2 - Thermoelectric supply system - Google Patents

Description

  The present invention relates to a thermoelectric supply system.

Cogeneration power generation systems (for example, see Patent Document 1 shown below) and heat pump technology (for example, see Patent Document 2 shown below) are known as technologies that use exhaust heat for effective use of energy. Yes. A cogeneration power generation system is associated with power generation from a prime mover in parallel with supplying power generated by driving a power generator by a prime mover to a customer's power demand (lighting equipment, power source, etc.) It is a combined heat and power system that supplies exhaust heat to the heat demand of customers (air conditioning equipment, hot water supply equipment, steam equipment, etc.). The heat pump technology is a technology that is used for air conditioning and hot water supply by utilizing exhaust heat from cooling, exhaust heat from used hot water, and the like.
JP 2007-187027 A JP 2008-95994 A

  In the cogeneration power generation system, since electric power and heat are supplied to consumers in parallel, the supply amounts of electric power and heat cannot be individually controlled. For this reason, it is difficult to independently adjust the supply and demand balance of electric power and heat, and the overall energy efficiency is lowered. For example, when priority is given to power supply / demand balance adjustment, a situation may occur in which the heat supply / demand balance is disrupted. Moreover, since the place where the electric power and heat are supplied from the cogeneration power generation system is limited to the consumer where the prime mover, the generator, and the like are installed, the degree of freedom of control for adjusting the balance between supply and demand of electric power and heat is low.

  On the other hand, in the case of the heat pump technology, the utilization efficiency of the exhaust heat is lowered depending on the use condition of the cooling and hot water as the exhaust heat source. For example, when using the exhaust heat of cooling for hot water supply, when the operating rate of cooling is low, the cooling exhaust heat (heat supply) cannot cover the heat demand for hot water supply, or when the operating rate of cooling is high There may be a situation where the exhaust heat (heat supply) exceeds the heat demand for hot water supply. That is, in the heat pump technology, it is difficult to independently perform supply / demand balance adjustment of power for operating cooling and supply / demand balance adjustment of heat for hot water supply.

  The present invention has been made in view of the above problems, and a main object of the present invention is to provide a thermoelectric supply system that independently performs power supply / demand balance adjustment and heat supply / demand balance adjustment.

In order to solve the above problems, a thermoelectric supply system that supplies electric power and heat, comprising: an electric power system; a plurality of distributed power sources including a cogeneration power generation system connected to the electric power system; and room temperature heat Qh. A room temperature tank for storing heat, an exhaust heat Qdg discharged according to the electric power Pdg generated by the cogeneration power generation system, and a room temperature heat Qh stored in the room temperature tank; A heat transfer heat pump for moving room temperature heat Qh stored in the room temperature tank to the heat tank, a superconducting power storage system for storing power Psm supplied from the power system by a superconducting coil cooled by a refrigerator, and A cold storage tank that stores heat Qsm supplied to the refrigerator and a cold demand Qc of the customer, and a cold heat Q stored in the cold storage tank during operation A cold moving heat pump is moved in the normal temperature tank, the cogeneration from said electric power system including a power Pdg that generated in the power generation system to power Pg to be supplied can cover the power demand Pd of customer cogeneration It controls the power Pdg that generated in the power generation system, heat which is accumulated in the thermal bath controls the operation or stop of the thermal movement heat pump as can cover the heat demand Qw of the customer, from the electric power system The electric power Pdg generated in the cogeneration power generation system is controlled so that the supplied electric power Pg and the electric power Psm stored in the superconducting power storage system can cover the electric power demand Pd of the consumer. The cold heat Ql stored in the heat is the cold heat demand Qc of the consumer and the cold As it can cover the supplied heat Qsm the machine, and having a control device for controlling the operation or stop of the cold moving heat pump.

  Further, in the above-described thermoelectric supply system, the plurality of distributed power sources include a solar power generation system and a wind power generation system in addition to the cogeneration power generation system, and the control device includes the power demand Pd of the consumer. An electric power supply and demand formula defined as Pd = Pdg + Ppv + Pw using electric power Pdg generated in the cogeneration power generation system, electric power Ppv generated in the solar power generation system, and electric power Pw generated in the wind power generation system The electric power Pdg generated in the cogeneration power generation system is controlled so as to be established, the thermal demand Qw of the consumer, the normal temperature heat Qh stored in the normal temperature tank, and the exhaust heat Qdg of the cogeneration power generation system As used, Qw = Qh + Qdg As heat supply formulas defined is satisfied, controls the operation or stop of the thermal movement heat pump, it is also possible.

  Further, in the above-described thermoelectric supply system, when the exhaust heat Qdg of the cogeneration power generation system exceeds the heat demand Qw of the consumer, the control device stops the heat pump for heat transfer, and the cogeneration power generation When the exhaust heat Qdg of the system is lower than the thermal demand Qw of the customer, the heat transfer heat pump may be operated.

  Moreover, it is said thermoelectric supply system, Comprising: The said normal temperature tank is an air thermal storage tank, It is good also as the said thermal tank being a hot water storage thermal storage tank.

  Further, in the above-described thermoelectric supply system, the room temperature tank stores residual heat Qdg ′ of the exhaust heat Qdg stored in the thermal tank among the exhaust heat discharged from the cogeneration power generation system, Also good.

  Also, the thermoelectric supply system described above, wherein the power demand Pd of the consumer, the power Pdg generated in the cogeneration power generation system, the power Ppv generated in the solar power generation system, and generated in the wind power generation system The power Pdg generated in the cogeneration power generation system is controlled so that the power supply and demand formula defined as Pd = Pdg + Ppv + Pw + Psm using the power Pw and the power Psm stored in the superconducting power storage system is established. The cold transfer so that the heat supply and demand formula defined as Ql = Qc + Qsm using the cold heat Ql stored in the cold storage tank, the cold demand Qc of the customer, and the heat Qsm supplied to the refrigerator is established. Control the operation or stop of the heat pump It may be.

  Moreover, it is said thermoelectric supply system, Comprising: The said cold storage tank is good also as being an ice thermal storage tank.

  In addition, the problems disclosed in the present application and the solutions thereof will be clarified by the column of the best mode for carrying out the invention and the drawings.

  ADVANTAGE OF THE INVENTION According to this invention, the thermoelectric supply system which implement | achieves each supply and demand balance adjustment of electric power and heat simultaneously can be provided.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.

<<< Overall configuration of thermoelectric supply system >>>
FIG. 1 is a diagram showing an overall configuration of a thermoelectric supply system according to an embodiment of the present invention.
The thermoelectric supply system shown in the figure mainly includes a myogrid power system 100, a microgrid heat system 200, a customer 300, and a microgrid control device 400.

=== Micro grid power system ===
The microgrid power system 100 is a small-scale power system that is interconnected at one point with an existing power system (not shown) or independent from the existing power system. The microgrid power system 100 is configured by combining a distributed power source that is difficult to control power, such as natural energy, and a distributed power source that can control power, so that the existing power system is considered while considering the environment. A system configuration that does not affect the system is possible.

  The micro grid power system 100 is connected to a solar power generation system 101 and a wind power generation system 102 as a distributed power source that is difficult to control power such as natural energy, and a cogeneration power generation system 103 as a distributed power source capable of power control. Is connected. Further, the microgrid power system 100 is connected to the power demand of the customer 300. Further, the super grid power storage system 104 is connected to the microgrid power system 100 for system stabilization.

  The solar power generation system 101 is a power generation system that converts solar light energy into electric energy using the photoelectric effect of a silicon semiconductor, and generates power using a solar cell panel in which a plurality of solar cells are arranged, and the solar cells. Consists of an inverter that changes electricity into alternating current. In the following, the power generated by the solar power generation system 101 is represented as Ppv.

  The wind power generation system 102 is a power generation system that converts wind energy of a windmill into mechanical power and transmits the power to a generator to convert it into electrical energy. A rotor system such as a blade and a rotor shaft, and a rotor system Is composed of a transmission system that transmits the rotational energy to the generator, a generator that converts the transmitted rotational energy into electrical energy, and the like. In the following, the electric power generated by the wind power generation system 102 is represented as Pw.

  The cogeneration power generation system 103 supplies the electric power generated by driving the generator with a prime mover (gas engine, gas turbine engine, diesel engine) toward the power demand (lighting, power, etc.) of the customer 300. At the same time, this is a combined heat and power system that supplies exhaust heat from the prime mover associated with power generation to the heat demand of the customer (air conditioning, hot water supply, steam, etc.). In addition to the system using the prime mover, the cogeneration power generation system 103 is a system using a fuel cell that scientifically reacts hydrogen and oxygen to generate electricity and uses exhaust heat generated by the power generation. May be. In addition, the electric power generated by the cogeneration power generation system 103 is expressed as Pdg, and the heat to be stored in the thermal bath 205 described later among the exhaust heat discharged according to the electric power generated by the cogeneration power generation system 103 is expressed as Qdg. The residual heat that is stored in the room temperature tank 203 described later is expressed as Qdg ′.

  The superconducting power storage system 104 is generally called SMES (Superconducting Magnetic Energy Storage), and stores electric energy by circulating current in a superconducting coil having a characteristic that electric resistance becomes zero when the temperature becomes extremely low. It is. The superconducting power storage system 104 stores a power in the superconducting coil, a cryogenic container containing a superconducting coil and a refrigerant (liquid helium, liquid nitrogen, etc.) for cooling the superconducting coil, a vacuum container containing the cryogenic container, and the superconducting coil. Or a switch for taking out stored electric power and an inverter for converting electric power taken out from the superconducting coil into alternating current. The refrigerant in the cryogenic container is cooled by a refrigerator 105 connected to the superconducting power storage system 104. The amount of electricity stored by the superconducting power storage system 104 is represented as Psm.

  The electric power demand of the customer 300 includes cooling, refrigeration, freezing, hot water supply for generating remaining hot water as a normal temperature heat source, which will be described later, hot water supply, heating, drying, etc., which will be described later. Note that the total power demand of the consumer 300 is represented as Pd.

=== Microgrid thermal system ===
The microgrid heat system 200 includes a cold water tank 201, a heat transfer heat pump 202, a room temperature tank 203, a heat transfer heat pump 204, and a heat tank 205. The microgrid heat system 200 heats the heat demand (heat demand, cold demand) of the customer 300. It is a supply system.

  The cold storage tank 201 uses cold heat gas (nitrogen or the like of less than 10 ° C.) as a heat medium. The heat (Qc) of the cold gas supplied to the cold demand Qc of the customer 300 and the heat of the cold gas supplied to the refrigerator 105. Qsm is stored. The cold demand is refrigeration, cooling, freezing in homes, supermarkets, food factories, and cooling of equipment installed in data centers, factories, and the like. The cold heat Ql stored in the cold heat tank 201 is moved to the normal temperature tank 203 by the heat pump 202 for moving cold.

  The heat transfer heat pump 202 is a device that moves the cold heat Ql stored in the cold heat tank 201 during operation to the normal temperature tank 203 with high efficiency. The heat transfer heat pump 202 for cooling transfer includes an evaporation unit 2021 that generates gas obtained by evaporating a low-temperature liquid by the cooling heat Q1 supplied from the cooling bath 201, and a compression unit that generates high-temperature gas by compressing the gas generated by the evaporation unit 2021. 2022, a condensing unit 2023 that generates high-pressure liquid of the original cold heat Ql by condensing the high-temperature gas generated by the compression unit 2022, and a low-temperature that expands the high-pressure liquid generated by the condensing unit 2023 and supplies it to the evaporation unit 2021 And an expansion part 2024 that generates liquid.

  The room temperature tank 203 uses air of normal temperature (10 ° C. to 40 ° C.) as a heat medium, and is stored in the cold heat Ql moved from the cold heat tank 201 by the cold heat transfer heat pump 202 and the hot water storage tank of the hot water supply facility of the customer 300. The room temperature heat Qm composed of the heat of the remaining hot water and atmospheric heat and the residual heat Qdg ′ that has not been stored in the hot water tank 205 among the exhaust heat discharged from the cogeneration power generation system 103 are stored. The room temperature heat Qh generated from the room temperature bath 203 is absorbed by the heat transfer heat pump 204.

  The heat transfer heat pump 204 is a device that moves the room temperature heat Qh generated from the room temperature tank 203 to the heat tank 205 with high efficiency. The heat transfer heat pump 204 includes an evaporation unit 2041 that generates a gas obtained by evaporating a low-temperature liquid from the normal temperature heat Qh supplied from the normal temperature bath 203, and a compression that generates a high-temperature gas by compressing the gas generated by the evaporation unit 2041. Unit 2042, condensing unit 2043 that generates the high-pressure liquid of the original room temperature heat Qh by condensing the high-temperature gas generated by the compression unit 2042, and the high-pressure liquid generated by the condensing unit 2043 is expanded and supplied to the evaporation unit 2041. And an expansion part 2044 for generating a low temperature liquid.

  The hot water tank 205 uses hot water (40 ° C. to 100 ° C.) as a heat medium, normal temperature heat Qh moved from the normal temperature tank 203 by the heat transfer heat pump 204, and exhaust heat Qdg discharged from the cogeneration power generation system 103. , Store heat. The total heat stored in the heat tank 205 is supplied to the heat demand Qw of the customer 300. The thermal demand Qw is, for example, hot water supply and heating in homes, hotels, hospitals, and nursing care facilities, hot water supply in a hairdressing salon and a laundry shop, drying, and heating in an agricultural greenhouse.

=== Microgrid control device ===
FIG. 2 is a diagram showing the configuration of the microgrid control device 400 and its peripheral connections.

  The microgrid control device 400 is a thermoelectric for realizing a supply and demand balance adjustment of power and heat in cooperation with each other between the microgrid power system 100 and the microgrid heat system 200 in order to improve overall energy efficiency. Take control. The microgrid control device 400 includes a CPU 401, a memory 402, a storage device 403 such as a hard disk, a communication device 404, an input device 405 such as a keyboard, and a display device 406 such as a liquid crystal display.

  Note that the communication device 404 is configured such that the heat Ql-st stored in the cooling / heating tank 201 measured by the calorimeter C1 installed in the cooling / heating tank 201, the amount of heat provided between the cooling / heating-transfer heat pump 202 and the room temperature tank 203. The heat Qm-st stored in the room temperature bath 203 measured by the calorimeter C3 installed in the room temperature bath 203, the heat Qm-st stored in the room temperature bath 203, and the heat transfer heat pump 204 and the heat bath 205 are provided. The heat Qh-st measured by the calorimeter C4 and the cold heat Qsm measured by the calorimeter C6 installed on the output side of the refrigerator 105 are received via the communication line 410.

  The communication device 404 is provided between the photovoltaic power generation system 101 and the microgrid power system 100, the power Ppv measured by the power meter W1 provided between the solar power generation system 101 and the microgrid power system 100, and between the wind power generation system 102 and the microgrid power system 100. The power Pw measured by the power meter W2, the power Pdg measured by the power meter W3 provided between the cogeneration power generation system 103 and the microgrid power system 100, the superconducting power storage system 104 and the microgrid power system The power Psm measured by the wattmeter W4 provided between the power line 100 and the power line 100 is received via the communication line 420.

<<< Thermoelectric control by microgrid controller >>>
=== Outline of thermoelectric control ===
The microgrid control device 400 uses the power Pdg to be generated in the cogeneration power generation system 103 so that the power (= total power generation amount Pg + power storage amount Psm) supplied from the microgrid power system 100 can cover the power demand Pd of the consumer 300. To control. Further, in the microgrid control device 400, the heat stored in the thermal bath 205 (= normal temperature heat Qh + exhaust heat Qdg discharged from the cogeneration system 103 + heat storage Qh-st of hot water in the thermal bath 205) is the customer 300. The operation or stop of the heat transfer heat pump 204 is controlled so as to cover the heat demand Qw.

  As described above, the supply and demand balance adjustment between the power demand Pd of the customer 300 and the power supplied from the microgrid power system 100 (= total power generation amount Pg + power storage amount Psm), the thermal demand Qw and the thermal energy of the customer 300 Supply / demand balance adjustment between heat stored in the tank 205 (= normal temperature heat Qh + exhaust heat Qdg discharged from the cogeneration power generation system 103 + heat storage Qh-st of hot water in the thermal tank 205) Can be done.

  In addition, the cogeneration power generation system 103 is connected to the microgrid power system 100, and heat discharged from the microgrid power system 100 flows into the microgrid heat system 200. For this reason, the supply / demand balance adjustment of the electric power and heat which cooperated mutually between the microgrid electric power system 100 and the microgrid heat system 200 is performed, and it becomes possible to improve comprehensive energy efficiency.

  Further, the microgrid control device 400 is configured so that the heat stored in the cold storage tank 201 (= heat Qsm supplied to the refrigerator 105 + cold heat demand Qc + heat storage Q1−st of the cold gas in the cold storage tank 201) is transferred by the heat transfer heat pump 202. Control is performed based on the power Pdc supplied to the equipment installed in the data center, factory, or the like so as to coincide with the cold heat Ql to be moved from the cold heat tank 201 to the room temperature tank 203. Thus, by providing the cooling / heating tank 201 in addition to the heating / heating tank 205 and the room temperature tank 203 and further by providing the heat pump 202 for cooling / transferring, the degree of freedom of control for adjusting the balance between heat supply and demand becomes higher.

Below, the content of the thermoelectric control of the microgrid control apparatus 400 is demonstrated using numerical formula.
First, the following power supply and demand formula is defined as the power supply and demand balance in the microgrid power system 100.
Pd = Pg + Psm Formula (1)
Pg = Pdg + Ppv + Pw Formula (2)
In Equation (1), it is expressed that the total power demand Pd of the customer 300 should be equal to the sum of the total power generation amount Pg in the microgrid power system 100 and the power storage amount Psm of the superconducting power storage system 104. Yes.

  In Formula (2), the total power generation amount Pg in the microgrid power system 100 is the power Pdg generated by the cogeneration power generation system 103, the power Ppv generated by the solar power generation system 101, and the wind power generation system. This indicates that the sum of the power Pw generated from 102 should match.

  The microgrid control device 400 controls the electric power Pdg generated by the cogeneration power generation system 103 so that the expressions (1) and (2) are established.

Next, the following heat supply and demand formula is defined as the heat supply and demand balance in the microgrid heat system 200.
Ql = Qc + Qsm + Ql−st (3)
Qh = Ql + Qm + Qdg ′ + Qm−st (4)
Qw = Qh + Qdg + Qh-st (5)

  Formula (3) represents the heat balance of the cold storage tank 201, and the cold heat Ql stored in the cold storage tank 201 is the heat Qc supplied to the cold demand, the heat Qsm supplied to the refrigerator 105, This represents the sum of the heat Ql-st originally stored.

  Equation (4) represents the heat balance of the room temperature tank 203, and the room temperature heat Qh stored in the room temperature tank 203 is the residual heat Qdg ′ discharged from the cogeneration power generation system 103, and is stored in the cold heat tank 201. This represents the total of the total cold heat Ql, the heat Qm of the room temperature heat source, and the heat Qm-st stored in the room temperature tank 203.

  Moreover, Formula (5) represents the heat balance of the thermal tank 205, and the thermal demand Qw of the customer 300 stored in the thermal tank 205 is room temperature heat Qh transferred from the heat transfer heat pump 204, cogeneration. This represents the sum of exhaust heat Qdg discharged from the power generation system 103 and heat Ql-st originally stored in the hot water tank 205.

By the way, the exhaust heat Qdg and the residual heat Qdg ′ discharged from the cogeneration power generation system 103 are determined according to the power Pdg generated by the cogeneration power generation system 103 as shown in the following equations.
Qdg = αPdg (α is a coefficient) Expression (6)
Qdg ′ = α′Pdg (α ′ is a coefficient) Expression (7)
Further, the heat Qdc for cooling the equipment installed in the data center or factory in the cold demand is determined by the power demand Pdc of these equipments as follows.
Qdc = γPdc (γ is a coefficient) (8)
Therefore, the cold demand Qc is expressed by the following equation.
Qc = Qc ′ + Qdc = Qc ′ + γPdc (9)

Substituting Expression (6), Expression (7), and Expression (9) in Expression (3), Expression (4), and Expression (5), the following expression is established.
Ql = Qc ′ + γPdc + Qsm + Ql−st (10)
Qh = Ql + Qm + α′Pdg + Qm−st (11)
Qw = Qh + αPdg + Qh−st (12)

  That is, the microgrid control device 400 moves from the cogeneration power generation system 103 to the normal temperature bath 203 from the cold heat bath 201 so that the formulas (10), (11), and (12) are satisfied. The heat Ql to be controlled and the heat Qh to be transferred from the room temperature tank 203 to the heat tank 205 are controlled.

=== Thermoelectric control when power supply / demand balance fluctuates ===
When Formula (1) is no longer established using the flowchart shown in FIG. 3, that is, the total power demand Pd of the customer 300 is the total power generation amount Pg in the microgrid power system 100 and the superconducting power storage system 104. The contents of the thermoelectric control in the case where it does not coincide with the total amount of stored electricity Psm will be described.

  First, when Formula (1) is no longer satisfied (S300: YES), the microgrid control device 400 determines that Formula (1), Formula (2), Formula (10), Formula (11), and Formula (12) are as follows. The control amount of the electric power Pdg generated by the cogeneration power generation system 103 is calculated so as to be established and the cold heat Ql and the room temperature heat Qh are minimized (S301), and the calculated electric power Pdg is used as the cogeneration power generation. It designates to the system 103 (S302). In minimization, an optimization method such as a local search method or an annealing method is used.

  The parameters adjusted in this case are the cold heat Ql, the normal temperature heat Qh, the heat Ql-st originally stored in the cold water tank 201, the heat Qm-st originally stored in the normal temperature tank 203, and the heat tank 205 originally. The heat Qh-st for storing heat and the amount Psm of electricity stored in the superconducting power storage system 104 (S303). However, by setting the upper and lower limit levels for the heats Ql-st, Qm-st, Qh-st and the storage amount Psm, the heats Ql-st, Qm-st, Qh-st and the storage amount Psm are within a predetermined range. Make sure to secure. The control loop from S300 to S303 is repeated until the end of thermoelectric control.

=== Thermoelectric control when the supply and demand balance of thermal energy fluctuates ===
When the equation (10) no longer holds using the flowchart shown in FIG. 4, that is, the thermal demand Qw of the customer 300 is discharged from the room temperature heat Qh stored in the room temperature tank 203 and the cogeneration power generation system 103. When the exhaust heat Qdg and the heat Qh-st in the hot water tank 205 do not coincide with each other (S400: YES), the microgrid control device 400 uses the equations (1), (2), and From the room temperature heat Qh and the cogeneration power generation system 103 that store the heat in the room temperature tank 203 so that (10), the expression (11), and the expression (12) are satisfied and the cold heat Ql and the room temperature heat Qh are minimized. The control amount of the electric power Pdg to be generated is calculated (S401).

  The microgrid control device 400 stores the room temperature heat Qh calculated in S401 in the hot water tank 205 and designates the power Pdg calculated in S401 to the cogeneration power generation system 103 (S402). In minimization, an optimization method such as a local search method or an annealing method is used.

  Further, the parameters adjusted in this case are the cold Ql, the heat Ql-st, the Qm-st, the Qh-st, and the charged amount Psm (S403). However, by setting the upper and lower limit levels for the heats Ql-st, Qm-st, Qh-st and the storage amount Psm, the heats Ql-st, Qm-st, Qh-st and the storage amount Psm are within a predetermined range. Make sure to secure. The control loop from S400 to S403 is repeated until the end of thermoelectric control.

=== Thermoelectric control when the supply / demand balance of cold energy fluctuates ===
When the equation (12) is no longer established using the flowchart shown in FIG. 5, that is, the cold heat Ql stored in the cold storage tank 201 is the cold demand Qc, the heat Qsm supplied to the refrigerator 105, and the cold storage tank. When the sum of the heat Ql-st in 201 does not match (S500: YES), the microgrid control device 400 determines that the equations (1), (2), (10), (11), The control amount of the cold heat Ql stored in the cold water tank 201 and the electric power Pdg generated by the cogeneration power generation system 103 is set so that the equation (12) is satisfied and the cold heat Ql and the room temperature heat Qh are minimized. Each is calculated (S501).

  The microgrid control device 400 stores the cold heat Ql calculated in S501 in the cold water tank 201 and designates the electric power Pdg calculated in S501 to the cogeneration power generation system 103 (S502). In minimization, an optimization method such as a local search method or an annealing method is used.

  The parameters adjusted in this case are room temperature heat Qh stored in the room temperature tank 203, heat Ql-st in the cold water tank 201, heat Qm-st in the room temperature tank 203, heat Qh− in the heat water tank 205. st, the storage amount Psm of the superconducting power storage system 104 (S503). However, by setting the upper and lower limit levels for the heats Ql-st, Qm-st, Qh-st and the storage amount Psm, the heats Ql-st, Qm-st, Qh-st and the storage amount Psm are within a predetermined range. Make sure to secure. The control loop from S500 to S503 is repeated until the end of thermoelectric control.

  According to the configuration of the microgrid power system 100 and the microgrid heat system 200 as described above, it is possible to independently adjust the supply and demand balance of electric power and heat, compared to the cogeneration by the cogeneration power generation system 103. Become.

  For example, when the exhaust heat Qdg (= αPdg) exhausted from the cogeneration power generation system 103 is larger than the thermal demand Qw of the customer 300 (Qw <αPdg), the thermal pump 204 is stopped and the thermal pump is used. Formula (12) can be established by reducing the electric power Pdg generated by the cogeneration power generation system 103 while reducing the normal temperature heat Qh transferred from the normal temperature tank 203 to the thermal tank 205 by the heat pump 204 to zero. .

  For example, when the exhaust heat Qdg (= αPdg) discharged from the cogeneration power generation system 103 is less than the heat demand Qw of the customer 300 (Qw> αPdg), the heat transfer heat pump 204 is operated to move the heat transfer Equation (12) can be established by moving the room temperature heat Qh from the room temperature tank 203 to the heat tank 205 by the heat pump 204 and increasing the power Pdg generated by the cogeneration power generation system 103.

  Also, by providing the heat transfer heat pump 202 and the heat transfer heat pump 204, it becomes easier to absorb the imbalance between the heat demand Qc and the heat demand Qw of the customer 300, and is discharged from the cogeneration power generation system 103. It is possible to effectively use the exhaust heat Qdg.

  For example, when the cold demand Qc of the customer 300 is less than the warm demand Qw (Qc <Qw), in Formula (11), the lack of cold Ql transferred from the cold storage tank 201 to the normal temperature tank 203 by the cold transfer heat pump 202 Minutes can be adjusted by increasing the room temperature heat Qm from the room temperature heat source, the residual heat Qdg ′ of the exhaust heat discharged from the cogeneration power generation system 103, and the heat Qm-st stored in the room temperature tank 203.

  Moreover, the heat supply-demand balance represented by Formula (10) can be adjusted by increasing the heat Ql-st that is originally stored in the cold heat tank 201 and increasing the cold heat Ql. Furthermore, the room temperature heat Qh is decreased by increasing the heat Qh-st that is originally stored in the hot water tank 205 and decreasing the room temperature heat Qh, or increasing the power Pdg generated by the cogeneration power generation system 103. be able to. However, since the electric power Pdg generated from the cogeneration power generation system 103 is increased, the total power generation amount Pg of the microgrid power system 100 is increased, and therefore, the electric power storage of the superconducting power storage system 104 is expressed by the equations (1) and (2). By reducing the amount Psm, the power supply / demand balance in the microgrid power system 100 can be adjusted.

  From the above, it is possible to adjust the heat supply-demand balance in the microgrid heat system 200 represented by the equations (10), (11), and (12). In addition, when it becomes the structure of one heat pump, for example, in the case of the structure by the cooling / heating tank 201, the cooling-heat transfer heat pump 202, and the heating / heating tank 205, the imbalance between the cooling / heating demand Qc of the customer 300 and the heating / heat demand Qw. The minute must be adjusted only by the heat stored in the cold and hot tank 201 and the hot and cold tank 205. For this reason, by setting it as the structure of two heat pumps, the freedom degree for adjusting the said unbalance will increase. Moreover, since the temperature difference which pumps up becomes small, the performance coefficient COP of the heat pump 202 for cold transfer and the heat pump 204 for warm transfer can be made high.

  Although the best mode for carrying out the present invention has been described above, the above embodiment is intended to facilitate understanding of the present invention and is not intended to limit the present invention. The present invention can be changed and improved without departing from the gist thereof, and equivalents thereof are also included in the present invention.

It is the figure which showed the whole structure of the thermoelectric supply system which concerns on one Embodiment of this invention. It is the figure which showed the structure of the microgrid control apparatus which concerns on one Embodiment of this invention, and its periphery connection. It is a flowchart which shows the flow of the specific process of the thermoelectric control at the time of the supply-and-demand balance fluctuation | variation of the electric power which concerns on one Embodiment of this invention. It is a flowchart which shows the flow of the specific process of the thermoelectric control at the time of the supply-and-demand balance fluctuation of the heat which concerns on one Embodiment of this invention. It is a flowchart which shows the flow of the specific process of the thermoelectric control at the time of the supply-and-demand balance fluctuation of the cold which concerns on one Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Micro grid power system 101 Solar power generation system 102 Wind power generation system 103 Cogeneration power generation system 104 Superconducting power storage system 105 Refrigerator 200 Micro grid heat system 201 Cold heat tank 202 Heat transfer pump 203 Cold room temperature heat pump 204 Heat transfer heat pump 205 Heat Tank 400 Microgrid control device

Claims (7)

A thermoelectric supply system for supplying electric power and heat,
A power system;
A plurality of distributed power sources including a cogeneration power generation system connected to the power system;
A room temperature tank for storing room temperature heat Qh;
A heat storage tank that stores exhaust heat Qdg discharged according to the power Pdg generated by the cogeneration power generation system and room temperature heat Qh stored in the room temperature tank;
A heat transfer heat pump that moves the room temperature heat Qh stored in the room temperature tank during operation to the heat tank;
A superconducting power storage system for storing power Psm supplied from the power system by a superconducting coil cooled by a refrigerator;
A cold storage tank for storing heat Qsm supplied to the refrigerator and cold demand Qc of the consumer;
A heat pump for moving cold that moves the cold heat Ql stored in the cold water tank during operation to the room temperature tank;
Controlling the power Pdg generated in the cogeneration power generation system so that the power Pg supplied from the power system including the power Pdg generated in the cogeneration power generation system can cover the power demand Pd of the consumer, The operation or stop of the heat transfer heat pump is controlled so that the heat stored in the heat tank can cover the heat demand Qw of the consumer, and stored in the superconducting power storage system with the power Pg supplied from the power system. The power Pdg generated in the cogeneration power generation system is controlled so that the generated power Psm can cover the power demand Pd of the consumer, and further, the cold heat Ql stored in the cold storage tank is the cold demand of the consumer Qc and the heat transfer to cover the heat Qsm supplied to the refrigerator A controller for controlling the operation or stop of Toponpu,
A thermoelectric supply system comprising: The thermoelectric supply system according to claim 1,
The plurality of distributed power sources have a solar power generation system and a wind power generation system in addition to the cogeneration power generation system,
The controller is
Using the power demand Pd of the consumer, the power Pdg generated in the cogeneration power generation system, the power Ppv generated in the solar power generation system, and the power Pw generated in the wind power generation system,
Pd = Pdg + Ppv + Pw
And controlling the electric power Pdg generated in the cogeneration power generation system so that the electric power supply and demand formula defined as follows is established,
Using the customer's thermal demand Qw, room temperature heat Qh stored in the room temperature tank, and exhaust heat Qdg of the cogeneration power generation system,
Qw = Qh + Qdg
Control the operation or stop of the heat transfer heat pump so that the heat supply and demand formula defined as
A thermoelectric supply system characterized by that. The thermoelectric supply system according to claim 2,
The controller is
When the exhaust heat Qdg of the cogeneration power generation system exceeds the consumer's thermal demand Qw, the heat transfer heat pump is stopped,
When the exhaust heat Qdg of the cogeneration power generation system is lower than the consumer's thermal demand Qw, the heat transfer heat pump is operated.
A thermoelectric supply system characterized by that. The thermoelectric supply system according to any one of claims 1 to 3,
The room temperature tank is an air heat storage tank, and the heat tank is a hot water storage heat storage tank,
A thermoelectric supply system characterized by The thermoelectric supply system according to any one of claims 1 to 4 ,
The room temperature tank stores the residual heat Qdg ′ of the exhaust heat Qdg stored in the thermal tank among the exhaust heat discharged from the cogeneration power generation system,
A thermoelectric supply system characterized by The thermoelectric supply system according to any one of claims 1 to 4 ,
Electric power demand Pd of the consumer, electric power Pdg generated in the cogeneration power generation system, electric power Ppv generated in the solar power generation system, electric power Pw generated in the wind power generation system, and storage in the superconducting power storage system Using the electric power Psm
Pd = Pdg + Ppv + Pw + Psm
And controlling the electric power Pdg generated in the cogeneration power generation system so that the electric power supply and demand formula defined as follows is established,
Using the cold Ql stored in the cold storage tank, the cold demand Qc of the customer, and the heat Qsm supplied to the refrigerator,
Ql = Qc + Qsm
To control the operation or stop of the heat transfer heat pump so that the heat supply and demand formula defined as
A thermoelectric supply system characterized by that. The thermoelectric supply system according to any one of claims 1 to 6 ,
The thermoelectric supply system according to claim 1, wherein the cold heat tank is an ice heat storage tank.

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