JP2013156937A - Optimal operation control device of energy network - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve such a problem that, when renewable energy and exhaust heat are produced more than heat demand, the surplus energy goes to waste, and promote further energy saving and COemission reduction by effectively using the surplus energy and flexibly using an electric power and heat mutually, in a network consisting of users in a district and an energy supply center.SOLUTION: A control device: estimates an energy demand amount used by users, an energy supply amount of renewable energy facilities, and an energy supply amount of suppliers using energy use information of the users, operation plans of the energy suppliers, and information such as weather forecast; evaluates a surplus energy amount or a surplus heat amount in a network; corrects the operation plans of the suppliers of the electric power or heat; and then executes the optimal operation plans of various types energy supply facilities.

Description

  The present invention relates to an optimal operation plan for various energy supply facilities in an energy network that interchanges electric power and heat used in an area composed of an energy center and energy consumers and in an industrial estate composed of a plurality of manufacturing factories. It is related with the apparatus which implements.

In recent years, prevention of global warming has become an urgent issue, and there is a need to reduce energy-derived CO ₂ emissions. In the manufacturing industry, energy consumption has been more or less flat as a result of the oil shock, and energy conservation has been actively promoted by changing manufacturing processes, introducing energy-saving equipment, and changing fuel. However, the energy consumption of the manufacturing industry is about 40% of the total domestic consumption. It still accounts for a high percentage. In the residential and business sectors, energy consumption is increasing year by year due to the spread of lifestyles that demand comfort and convenience. In the future, in order to realize energy saving and CO ₂ emission reduction, it is required to make effective use of energy through active utilization of renewable energy and mutual interchange of electricity and heat.

  As a conventional technology for networking energy and saving energy through mutual accommodation, for example, as shown in Patent Document 1, there is an optimum operation control device for district cooling and heating in which a heat supply plant and a plurality of consumers are networked.

JP 2009-243718 A

In general, an optimal operation control device for district heating and cooling optimizes each energy supply facility with respect to the predicted heat demand of the customer so as to minimize an evaluation function such as operation cost, energy use amount or CO ₂ emission amount. Calculates the operating state and outputs a load factor control instruction that indicates the operating output for start / stop and rated output.

  However, the conventional technology only provides one-way energy supply from the energy center, and the energy supply side is not distributed and is not intended for mutual energy exchange or effective use of renewable energy. It is difficult to realize.

The present invention has been made in view of the above-mentioned problems of the prior art, and in order to realize energy saving and CO ₂ emission reduction in the region, effective utilization of renewable energy on the network and power and heat are saved. It is an apparatus that provides an operation method using an optimum operation plan for energy supply facilities for mutual accommodation.

In order to reduce the amount of CO ₂ emissions in the region, the present invention uses information such as consumer energy use information, energy supplier operation plans, weather forecasts, etc. Estimate the energy supply amount of potential energy facilities and the energy supply amount of the supplier, implement the optimum operation plan of multiple types of energy supply facilities in the energy supplier and the energy center, start / stop and load of each energy supply facility In the energy supply facility optimal operation device that outputs the rate to the energy supply facility or outputs guidance to the operation manager, the power or heat surplus amount in the network is evaluated, and the operation plan of the power or heat supplier is corrected Optimal energy supply facility, characterized by performing optimal operation plans for various energy supply facilities after It is an operation control device.

By implementing optimal operation of energy supply facilities that can effectively use renewable energy generated from the network and energy from suppliers without waste, further energy savings and CO ₂ emission reductions that could not be achieved with conventional technologies Can be realized.

The structure of the energy network apparatus of one Example by this invention. The structure of the energy network optimal operation control apparatus of one Example by this invention. The evaluation flow of energy supply equipment operation | movement by this invention. An example of the optimal operation plan of the energy network by this invention.

In the embodiment of the present invention, the energy usage information of each consumer in the region, the operation plan of each energy supplier, the information such as the weather forecast, etc., the energy demand used by the consumer, the energy of the renewable energy facility Estimate the supply amount and the energy supply amount of the energy supplier, implement the optimum operation plan for multiple types of energy supply facilities in the energy supplier and energy center, and supply the energy for start / stop and load factor of each energy supply facility When there is power surplus or heat surplus in the network when outputting instructions to the facility or guidance to the operation manager, the optimum operation plan for various energy supply facilities after correcting the operation plan of the power or heat supplier I do. Thus, by utilizing without waste energy in the network, it is possible to provide the optimum operation control device for the energy supply equipment to minimize CO ₂ emissions.

[Example 1]
FIG. 1 shows the configuration of an energy network according to an embodiment of the present invention. The energy network consists of an energy center 1 that supplies electricity and heat, a customer 2, a solar power generation facility 3 and a solar heat collection facility 4 as renewable energy facilities, a cleaning plant 5 and a fuel cell facility 6 as energy suppliers. It is configured. The energy supply facility in the energy center 1 includes a boiler 7, an absorption water heater 8, a heat pump 9, a cogeneration system 10, an exhaust heat recovery power generation facility 27, a high temperature water tank 11, and a low temperature water tank 12.

  The high temperature water 13 generated by the energy supply facility in the energy center 1 is sent to the customer 2 through the outgoing pipe 15 by the liquid feed pump 18 and returns to the energy center 1 through the return pipe 16 as the low temperature water 14. . Heat exchange between the energy network pipes 15 and 16 and the customer 2, the solar heat collecting equipment 4, the cleaning factory 5, the fuel cell equipment 6 or the exhaust heat recovery power generation equipment 27 is performed by the heat exchanger 17, respectively.

  The electric power 20 is supplied from the electric power system 21, and the energy network is connected to the energy network electric power system 22 downstream from the power receiving facility 23, and electric power is supplied to each device. The customer 2, the renewable energy facility, the energy supplier, and the energy supply facility in the network are connected by the information communication network 25, and are controlled by the energy network monitoring control device 24.

  FIG. 2 shows the configuration of an energy network monitoring and control device 24 according to an embodiment of the present invention. This device includes an input unit 101 for inputting information such as consumer energy usage information, weather forecast, supplier operation plan for power and heat, facility specifications, facility state quantity, etc. Heat demand calculator 102, renewable energy power and heat supply calculator 103, energy supplier power and heat supply calculator 104, network power surplus and heat surplus calculator 106 , An operation plan correction unit 107 for the electric power and heat supplier, a calculation unit 108 for executing the optimum operation plan for the energy supply facility based on the above information, and a command for judging the operation method of the energy supply facility based on the result of the optimum operation plan Energy supply facility operation command unit 109 to perform, input information, calculation result, result display unit 110 for displaying the result of operation command, data storage unit 111 for storing input information, calculation result, and result of operation command It consists of.

  FIG. 3 shows an evaluation flow of the optimum operation control of the energy supply facility of the energy network monitoring control device. First, in step 200, information such as energy usage information of an energy consumer on the regional energy network, weather forecast, an operation plan of an energy supplier, equipment specifications, equipment state quantities, and the like are input. In step 201, based on the consumer's past energy usage information and weather forecast, the energy demand for power and heat used by the consumer is predicted using a demand prediction technique such as memory-based reasoning or a neural network. Next, in step 202, based on the weather forecast, the renewable energy equipment specification and the equipment state quantity, the supply amount of electric power and heat generated by the photovoltaic power generation equipment 3 and the solar heat collecting equipment 4 which are the renewable energy equipment is predicted. . Next, in step 203, the electric power and the amount of heat generated in the cleaning factory 5 are predicted based on the operation plan of the cleaning factory 5 which is an energy supplier. Next, in step 204, an optimum operation plan within the planning period of the energy supply facility including the power storage and heat storage device is performed.

  Next, in step 205, the power surplus amount and the heat surplus amount generated in the energy network within the planning period are evaluated. Next, when a surplus amount of power or a surplus amount of heat is generated in the energy network in step 206, in step 208, the operation plan of the power or heat supplier is corrected. In this case, the operation plan of the energy supplier may be directly changed from the energy network monitoring control device 24, or the operation plan change may be requested. Further, Steps 203, 204, and 205 are performed again. In Step 206, if no surplus power or heat surplus occurs in the energy network, operation is commanded to the energy supply equipment in Step 207.

Here, the optimum operation plan within the planning period of a plurality of types and a plurality of energy supply facilities including the power storage and heat storage devices in step 204 will be described. The total power demand, which is the sum of the power demand P _d of each customer in the energy network, is the power P ₀ purchased from the power system outside the energy network, the power P _r by renewable energy such as solar power generation, the incineration plant power P _f by energy supply house etc, the power P _e by the power generation equipment such as a cogeneration system, power P _s by the energy storage equipment (discharge: positive, power storage: negative values) using, by the following equation It is done.

Here, power P _r by renewable energy of solar power generation and the like, the power P _f by the supply house, such as cleaning plant, power P _e by the power generation equipment such as cogeneration systems, power P _s by the energy storage equipment, energy in the network Of power.

In addition, the total heat demand Q _d of the heat demand Q _d of each customer in the energy network is the heat quantity Q _r by renewable energy such as solar heat collecting equipment, the heat quantity Q _f by the energy supplier such as a cleaning plant, It is given by the following equation using the heat quantity Q _e by the heat source equipment such as a heat pump and the heat quantity Q _s by the heat storage equipment (heat radiation: positive value, heat storage: negative value).

  Here, equations (1) and (2) represent the amount of power and the amount of heat per time interval Δt obtained by dividing the operation plan period by an arbitrary integer N. For example, when the operation plan period is 24 hours, the amount of electric power and the amount of heat per hour at a certain time are shown.

In order to minimize the CO ₂ emission in the energy network, the evaluation function J for the optimum operation plan of the energy supply facility is given by the following equation.

Here, Epo _{, t} is the CO ₂ emission amount per time interval Δt associated with the use of electric power, and Eg _t is the CO ₂ emission amount per time interval Δt associated with the use of fuel. Ex _t is CO ₂ emission amount per time interval Δt due to factors other than electric power and fuel. For example, there is CO ₂ emission amount generated by incineration of garbage in a cleaning factory.

In this embodiment, the evaluation function J is the CO ₂ emission amount due to the use of electric power and fuel, but it is possible to implement an optimal operation plan that minimizes the operation cost if the electric power rate and fuel cost are used. Become.

  In the first embodiment shown in FIG. 1, when an excess amount of heat is generated, in the exhaust heat recovery power generation facility 27 using hot water as a heat source, heat is converted into electric power using, for example, a binary power generation device or stored in a storage battery 19. Can also be implemented. Conversely, when a surplus amount of power is generated, the heat pump 9 can convert the power into hot water and use it, or heat can be stored in the high-temperature water tank 11. The embodiment 1 shown in FIG. 1 targets electric power and hot water as energy, but includes a chilled water piping system including a chilled water production facility such as an electrically driven turbo chiller or a fuel or high temperature water driven absorption chiller. When a surplus amount of electric power is generated, it is possible to use electric power converted into cold water by a turbo refrigerator or to store cold water in a heat storage tank. Moreover, when a surplus occurs in the hot water supply, the hot water can be converted into cold water using an absorption refrigerator, or cold water can be stored in a heat storage tank.

Based on the above, the total power demand and heat demand in the energy network, the power and heat supply from renewable energy, and the power and heat supply from the energy supplier are used as input conditions, and the equations (1) and (2) are restricted. the condition, the evaluation function equation (3), linear programming Ya power from energy supply equipment P _e and heat Q _e, the charge-discharge quantity P _s and heat storage, heat discharge Q _s by the energy storing facility as an optimization parameter Perform optimization calculations using optimization techniques such as metaheuristics to maximize the use of renewable energy and energy suppliers to minimize CO ₂ emissions generated within the energy network can do. Power P _e and the amount of heat Q _e from energy supply equipment to optimize parameters, specifically, starting and stopping the variable (1: Start 0: Stop) handle and the load factor of (0-1) as the optimization parameter. In addition, in the case of charge / discharge amount P _s and heat storage / heat release amount Q _s by the energy storage facility, the stored energy amount and the released energy amount with respect to the maximum stored energy amount are treated as load factors, and the load factor of stored energy is -1 ~ 0, the load factor of emitted energy varies from 0 to 1.

  As a result of the optimization analysis, if surplus power or thermal energy is generated in step 206, the operation plan of the power or heat supplier is corrected in step 208 of FIG.

  The above operation optimal plan is intended for the case where each customer, each energy supplier, and each energy center on the energy network are in the same power receiving system, but each customer, each energy supplier, and energy on the energy network. The center may not be in the same power receiving system. In this case, since the network for only the thermal energy is configured, only the surplus heat amount is evaluated, and the operation plan of the heat supplier is corrected, and then the optimum operation plan for various energy supply facilities is performed.

  In the spring and autumn intermediate periods, energy demand may be low, and there is a possibility that surplus electricity or heat surplus will be generated only by renewable energy and energy supply from energy suppliers. In such a case, all of the generated energy cannot be consumed on the network, energy is wasted, and sufficient energy saving cannot be realized.

As an embodiment of the present invention, FIG. 4 shows an example when the operation plan of a cleaning factory is corrected. In a present Example, the case where warm water is made into object is shown. As shown in Fig. 4 (a), before revising the operation plan of the cleaning factory, the boiler operation and the heat storage / heat storage operation of the heat storage tank are used so as to make maximum use of heat demand, waste heat of the cleaning factory, and solar heat. Despite optimizing the plan, there is a heat surplus. As a result, surplus heat is discarded and energy is wasted. Therefore, as shown in Fig. 4 (b), the operation plan of the cleaning factory is modified to change the exhaust heat supply amount so that the heat surplus does not occur, and the boiler operation and the heat dissipation / heat storage operation plan of the heat storage tank are changed. Can be optimized. As a result, it was possible to use surplus heat that was discarded before the operation plan of the cleaning factory was used without waste, and to reduce CO ₂ emissions.

Mutual interchange of renewable energy and factory waste heat in an energy network that mutually interchanges electricity and heat used in an area consisting of energy centers and energy consumers, and in industrial parks where multiple manufacturing plants are located Thus, it is possible to provide an optimum operation method and apparatus for an energy supply facility that realizes energy saving and CO ₂ emission reduction.

1 ... Energy center, 2 ... Customers, 3 ... Solar power generation equipment, 4 ... Solar heat collection equipment, 5 ... Incineration plant, 6 ... Fuel cell equipment, 7 ... Boiler, 8 ... Absorption water heater, 9 ... Heat pump, 10 ... Cogeneration system, 11 ... High temperature water tank, 12 ... Low temperature water tank, 13 ... High temperature water, 14 ... Low temperature water, 15 ... Outward pipe, 16 ... Return pipe, 17 ... Heat exchanger, 18 ... Pump, 19 ... Storage battery, 20 ... Electric power, 21 ... Electric power system, 22 ... Energy network electric power system, 23 ... Power receiving equipment, 24 ... Energy network monitoring and control device, 25 ... Information communication network, 26 ... Fuel, 27 ... Waste heat recovery power generation equipment,
DESCRIPTION OF SYMBOLS 101 ... Input part, 102 ... Calculation part of electric power and heat demand of a consumer, 103 ... Calculation part of electric power and heat supply of renewable energy, 104 ... Calculation part of electric power and heat supply of an energy supplier, 106 ... Network power surplus and heat surplus calculation unit 107 ... Energy supplier operation plan correction unit 108 ... Energy supply facility optimum operation plan calculation unit 109 ... Energy supply facility operation command unit 110 ... Result display Part, 111 ... data storage part

Claims (5)

An input unit for inputting information such as energy use information of energy consumers on the local energy network, operation plan of energy suppliers, and weather forecast;
A calculation unit that predicts the energy demand of electric power and heat used by consumers using the input information,
A computing unit for predicting the energy supply of renewable energy facilities;
An arithmetic unit for predicting the energy supply amount of the energy supplier;
An arithmetic unit for calculating an optimum operation plan of plural types of energy supply facilities in an energy supplier and an energy center;
An energy supply facility operation command unit that instructs the energy supply facility to start / stop and load factor of each energy supply facility based on the optimum operation plan, or outputs guidance to the operation manager;
A storage unit for storing input information, calculation results, and operation results;
A result display unit for displaying input information, a calculation result, and an operation result, and an energy supply facility optimum operation control device,
When each customer, supplier, and energy center on the energy network are in the same power receiving system, the power or heat surplus in the network was evaluated and the operation plan of the power or heat supplier was revised. An energy supply facility optimum operation control device, which performs an optimum operation plan of various energy supply facilities later. An input unit for inputting information such as energy use information of energy consumers on the local energy network, operation plan of energy suppliers, and weather forecast;
A calculation unit that predicts the energy demand of electric power and heat used by consumers using the input information,
A computing unit for predicting the energy supply of renewable energy facilities;
An arithmetic unit for predicting the energy supply amount of the energy supplier;
An arithmetic unit for calculating an optimum operation plan of plural types of energy supply facilities in an energy supplier and an energy center;
An energy supply facility operation command unit that instructs the energy supply facility to start / stop and load factor of each energy supply facility based on the optimum operation plan, or outputs guidance to the operation manager;
A storage unit for storing input information, calculation results, and operation results;
A result display unit for displaying input information, a calculation result, and an operation result, and an energy supply facility optimum operation control device,
If each customer, supplier, and energy center on the energy network are not in the same power receiving system, the heat surplus amount in the network is evaluated, and the operation plan of the heat supplier is revised and then various energy supply facilities are installed. Energy supply facility optimal operation control device that performs optimal operation planning.   3. The energy supply facility optimum operation control device according to claim 1 or 2, wherein when a surplus of electric power is generated, the storage battery stores the heat or heat medium such as hot water or cold water generated by the electric drive energy supply facility. Energy supply equipment optimal operation control device that uses equipment to store heat.   The energy supply equipment optimal operation control device according to claim 1 or 2, wherein when hot water is surplus on the energy network, the energy is stored by the equipment that stores the cold water generated in the cold water production facility using hot water as a heat source. Supply equipment optimum operation control device.   The energy supply facility optimum operation control device according to claim 1 or 2, wherein when the hot water is surplus on the energy network, the power is stored by the facility for storing the electric power generated by the exhaust heat recovery power generation facility using the hot water as a heat source. Energy supply equipment optimum operation control device.

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