JP2016170714A - Energy management system, energy management method and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an energy management system, an energy management method and a program capable of allowing a management person to easily check an apparatus or timing to be subjected to operational change.SOLUTION: The energy management system includes: a data acquisition section; and a limit cost calculation unit. The data acquisition section sequentially acquires a process data which containing a piece of operation information as information relevant to the operation of at least one energy supply apparatus as a control object. The limit cost calculation unit calculates a limit cost representing an energy unit price of consumption energy with respective to the energy conversion efficiency of the energy supply apparatus based on the process data.SELECTED DRAWING: Figure 2

Description

  Embodiments described herein relate generally to an energy management apparatus, an energy management method, and a program.

  In recent years, there has been an increasing interest in BCP (Business Continuation Plan) as a measure against natural disasters such as earthquakes, and a demand for carbon dioxide (CO2) emission reduction as a measure against global warming. As one of the solutions, efforts to make effective use of energy through integrated management and control of urban social infrastructure (infrastructure) such as electricity, communications, water, and transportation across a wide area are becoming active. Therefore, conventionally, a method for determining an operation plan that minimizes energy consumption, cost, and CO2 generation amount in a predetermined period in an energy supply facility having a heat storage tank has been proposed.

  All of these methods are planning methods for operating plans such as cost minimization, CO2 minimization, demand response response, etc. focusing on heat storage. When selecting the startup priority of each heat source device, Only the unit price is calculated. In addition, the plan could not be revised until after the operation plan was determined. On the other hand, operation control by a human system is required in plant control where strict optimum operation is not possible. For this reason, the administrator may not be able to confirm on which device the operation correction will be performed.

Japanese Patent No. 3763767

  The problem to be solved by the present invention is to provide an energy management device, an energy management method, and a program that allow an administrator to easily check the device or timing for operation correction.

  The energy management apparatus according to the embodiment includes a data acquisition unit and a marginal cost calculation unit. The data acquisition unit sequentially acquires process data having operation information that is information related to operation of at least one energy supply device to be controlled. The marginal cost calculation unit calculates a marginal cost indicating an energy unit price of energy consumption with respect to the energy conversion efficiency of the energy supply device based on the process data.

The schematic block diagram which shows the structure of the energy management system which concerns on 1st Embodiment. The schematic block diagram which shows the structure of the energy management apparatus which concerns on 1st Embodiment. 5 is a flowchart showing COP calculation processing according to the first embodiment. The figure which shows the example of a display of the time transition of COP which concerns on 1st Embodiment. The figure which shows the example of a display of the load factor dependence of COP which concerns on 1st Embodiment. The flowchart which shows the marginal cost calculation process which concerns on 1st Embodiment. The figure which shows the example of a display of the time transition of the marginal cost which concerns on 1st Embodiment. The schematic block diagram which shows the structure of the energy management apparatus which concerns on 2nd Embodiment. The flowchart which shows the marginal cost calculation process which concerns on 2nd Embodiment. The figure which shows the example of a display of the time transition of COP which concerns on 2nd Embodiment. The figure which shows the example of a display of the time transition of the marginal cost which concerns on 2nd Embodiment. The schematic block diagram which shows the structure of the energy management system which concerns on 3rd Embodiment. The flowchart which shows the marginal cost calculation process which concerns on 3rd Embodiment. The figure which shows the example of a display of the time transition of the marginal cost which concerns on 3rd Embodiment. The flowchart which shows the priority calculation process which concerns on 3rd Embodiment. The figure which shows the example of a display of the time transition of the priority which concerns on 3rd Embodiment. The schematic block diagram which shows the structure of the energy supply system which concerns on 4th Embodiment. The schematic block diagram which shows the structure of the energy management apparatus which concerns on 4th Embodiment. The flowchart which shows the marginal cost calculation process which concerns on 4th Embodiment. The figure which shows the example of a display of the time transition of DR corresponding | compatible marginal cost which concerns on 4th Embodiment. The figure which shows the example of a display of the incentive dependence of the marginal cost which concerns on 4th Embodiment.

  Hereinafter, an energy management device, an energy management method, and a program according to embodiments will be described with reference to the drawings.

(First embodiment)
First, the first embodiment will be described.
FIG. 1 is a schematic block diagram showing the configuration of the energy management system S1 according to the present embodiment. The energy management system S <b> 1 according to this embodiment includes an energy management device 1, an energy supply plant 2, and a customer 3.

The energy management device 1 is a device that performs energy management of the energy supply plant 2. The energy supply plant 2 is a facility that supplies energy corresponding to the load to the customer 3. Examples of the form of energy to be supplied include electric power, cold heat, hot heat, and steam. The user of the energy management device 1 is an administrator (operator) who mainly manages the operation state of the energy management device 1 and the energy supply device 2, operates and corrects the operation plan.
The energy supply plant 2 includes a local control device 201 and a control target device 202. The local control device 201 controls the operation of the control target device 202 based on the control setting by the energy management device 1. In addition, the local control device 201 generates process data indicating the operation record of the control target device 202 and transmits the generated process data to the energy management device 1. The control target device 202 is one or a plurality of energy supply devices that supply energy. In the following description, the entire energy supply apparatus installed in each energy supply apparatus and energy supply plant 2 is collectively referred to as a control target device 202.

The consumer 3 is a facility that receives energy supplied from the energy supply plant 2. The consumer 3 includes facilities with loads such as buildings such as buildings and houses, buildings, and facilities. The load is a main body that consumes energy supplied in any form or a combination of electric power, cold heat, hot heat, and steam. In the following description, individual facilities that receive energy or the entirety of those facilities are collectively referred to as a customer 3.
The internal network 4 is a network that connects the energy management device 1 to the energy supply plant 2 and the customer 3 so that various types of data can be transmitted and received. The internal network 4 is, for example, a local area network (LAN), a virtual private network (VPN), or a combination thereof.

In the example shown in FIG. 1, the energy management apparatus 1 is installed at a point away from the energy supply plant 2 to be controlled connected via the internal network 4, but inside the energy supply plant 2, for example, a local It may be installed in a monitoring room.
In the example shown in FIG. 1, the energy supply plant 2 is arranged at a point away from the customer 3 as the supply destination, but is installed in a facility common to the customer 3, for example, a factory or a building. Also good.

  The energy management device 1 is one or a plurality of server devices that acquire process data from each of the energy supply plant 2 and the customer 3. The energy management device 1 calculates the device efficiency (COP: Coefficient of Performance) of the control target device 202 based on the acquired process data. COP means the conversion efficiency from the consumption energy of the control target apparatus 202 to the adjustment energy, and is also called a coefficient of performance and consumption efficiency. The marginal cost means the unit energy consumption per unit production energy. The consumed energy is energy that is consumed when the control target device 202 produces energy to be supplied to the consumer 3. The consumed energy is energy in the form of electric power, gas, coal, oil, natural gas, firewood and the like. The production energy is energy that the control target device 202 produces according to the load of the consumer 3. Production energy is energy in the form of electricity, cold, warm, steam, and the like.

Next, the configuration of the energy management device 1 will be described.
FIG. 2 is a schematic block diagram illustrating a configuration of the energy management device 1 according to the present embodiment.
The energy management apparatus 1 implements various functions by executing a control program. The energy management apparatus 1 includes a communication unit 10, a process data acquisition unit 101, a process data storage unit 11, an input unit 12, an input control unit 121, a setting input data storage unit 13, an arithmetic processing unit 14, A calculation result storage unit 15, a display control unit 16, and a display unit 17 are provided. The energy management apparatus 1 is configured by an electronic computer including a CPU (Central Processing Unit) that executes a predetermined control program, a control program, and a storage medium that stores various data. The CPU functions as the process data acquisition unit 101, the input control unit 121, the arithmetic processing unit 14, and the display control unit 16 by executing processing instructed by the control program.

  The communication unit 10 is connected to the internal network 4 and receives process data 111 from the energy supply plant 2. The communication unit 10 outputs the received process data 111 to the process data acquisition unit 101. The communication unit 10 is a communication interface, for example. The process data 111 will be described later.

  Process data acquisition unit 101 receives process data 111 from communication unit 10. The process data acquisition unit 101 may directly acquire the process data 111 from the energy supply plant 2 without going through the communication unit 10 and the internal network 4. The process data acquisition unit 101 stores the acquired process data 111 in the process data storage unit 11.

  The process data storage unit 11 stores process data 111. The process data 111 is data indicating operation records of the energy supply plant 2, energy demand records of the customer 3, and the like. The operation record of the energy supply plant 2 includes operation information such as a work rate of consumed energy and a work rate of production energy of each control target device 202 in the energy supply plant 2. The operation information is stored in association with date / time information indicating the date / time acquired sequentially at predetermined time intervals. The time interval is, for example, 1 hour.

The input unit 12 receives an operation input and generates an input signal corresponding to the received operation input. The input unit 12 generates an input signal indicating setting input data. The setting input data is evaluation period data 131 indicating an evaluation period, plant model data 132 indicating a plant model of each control target device 202, and model parameter data 133 indicating a model parameter of the plant model. The input unit 12 includes input devices such as a touch sensor, a mouse, and a keyboard, for example. The input unit 12 may include an input / output interface. The input / output interface is connected to an external device (not shown), and receives plant model data 132 and model parameter data 133. The input unit 12 outputs the acquired input signal to the input control unit 121.
The input control unit 121 stores the setting input data indicated by the input signal input from the input unit 12 in the setting input data storage unit 13.

The setting input data storage unit 13 stores setting input data from the input control unit 121. Among the set input data, the evaluation period data 131 is data indicating an evaluation period of various data used for processing in the arithmetic processing unit 14.
The plant model data 132 is data indicating the control target device 202 arranged in the energy supply plant 2 and its attributes, for example, the type of the control target device 202 and its connection form.
The model parameter data 133 is data indicating operation parameters of the control target device 202 installed in the energy supply plant 2 as model parameters. The model parameter data 133 includes, for example, the maximum output of energy that can be supplied by the control target device 202, the energy unit price of energy consumption, and the like. For each date and time when the energy unit price varies depending on the date and time, the model parameter data 133 may include the energy unit price for each date and time.

  The calculation processing unit 14 includes a COP calculation unit 141 and a marginal cost calculation unit 142. The arithmetic processing unit 14 performs processing described below using the process data 111 sequentially read from the process data storage unit 11, the plant model data 132 and the model parameter data 133 sequentially read from the setting input data storage unit 13. .

  The COP calculation unit 141 calculates the COP within the evaluation period indicated by the evaluation period data 131 from the operation record indicated by the process data 111 for each control target device 202 indicated by the plant model data 132. The COP calculation unit 141 generates COP data 151 indicating the calculated COP, and stores the generated COP data 151 in the calculation result storage unit 15. The COP calculation process will be described later.

  The marginal cost calculation unit 142 reads the COP data 151 from the calculation result storage unit 15. The marginal cost calculation unit 142 calculates the marginal cost for each control target device 202 indicated by the plant model data 132 from the model parameter indicated by the model parameter data 133 and the COP indicated by the COP data 151. The marginal cost calculation unit 142 generates marginal cost data 152 indicating the calculated marginal cost, and stores the generated marginal cost data 152 in the calculation result storage unit 15. The marginal cost calculation process will be described later.

  The calculation result storage unit 15 stores calculation result data indicating a calculation result by the calculation processing unit 14. Among the calculation result data, the COP data 151 is data indicating the set value and the actual value of the COP for each predetermined time of each control target device 202. The marginal cost data 152 is data indicating the setting value and the actual value of the marginal cost for each control target device 202 every predetermined time.

  The display control unit 16 sequentially reads the limit cost data 152 as the calculation result data stored in the calculation result storage unit 15 and generates display data that represents the limit cost indicated by the read limit cost data 152 in a predetermined display form. . The display control unit 16 displays the marginal cost by outputting the generated display data to the display unit 17. As a display form of the marginal cost, various display forms such as a table form and a graph form can be used. The display control unit 16 may cause the display unit 17 to display the COP indicated by the COP data 151 and other calculation results.

  The display unit 17 displays information indicated by the display data input from the display control unit 16. The display unit 17 includes a display device such as a liquid crystal display or an organic EL (Electro-Luminescence) display.

Next, the COP calculation process according to the present embodiment will be described.
FIG. 3 is a flowchart showing COP calculation processing according to the present embodiment.
(Step S101) The input unit 12 acquires the evaluation period data 131, and the input control unit 121 stores the evaluation period data 131 acquired by the input unit 12 in the setting input data storage unit 13. As a result, an evaluation period and a time interval (for example, 1 hour) that are the basis of the COP calculation process are set. The energy management device 1 repeats the processes of steps S102 to S108 at the set time interval in the set evaluation period, and ends the process shown in FIG. 3 after the evaluation period ends.

(Step S <b> 102) The arithmetic processing unit 14 reads the process data 111 from the process data storage unit 11, the plant model data 132 from the setting input data storage unit 13, and the COP data 151 from the calculation result storage unit 15. Thereafter, the process proceeds to step S103.
(Step S <b> 103) The COP calculation unit 141 calculates a COP actual value (actual COP) of the control target device 202 based on the process data 111, the plant model data 132, and the model parameter data 133. A method for calculating the actual COP will be described later. Thereafter, the process proceeds to step S104.

(Step S104) The COP computing unit 141 compares the maximum value (highest COP) of the past actual COP within the evaluation period indicated by the COP data 151 with the actual COP at that time (current). If the actual COP is equal to or higher than the highest COP (YES in step S104), the process proceeds to step S105. If the actual COP is less than the highest COP (NO in step S104), the process proceeds to step S106.
(Step S105) The COP calculating unit 141 updates the actual COP as the highest COP. Thereafter, the process proceeds to step S106.

(Step S106) The COP calculation unit 141 compares the minimum value (minimum COP) of the past actual COP within the evaluation period indicated by the COP data 151 with the actual COP. If the actual COP is equal to or lower than the lowest COP (YES in step S106), the process proceeds to step S107. If the actual COP is greater than the lowest COP (NO in step S106), the process proceeds to step S107.
(Step S107) The COP computing unit 141 updates the actual COP as the lowest COP. Thereafter, the process proceeds to step S108.

(Step S108) The COP calculation unit 141 stores the calculated actual COP and stores the COP data 151 indicating the updated highest COP and lowest COP in the calculation result storage unit 15. The display control unit 16 causes the display unit 17 to display the actual COP, the highest COP, and the lowest COP indicated by the COP data 151 read from the calculation result storage unit 15. Thereafter, the process returns to step S102.

Next, the method for calculating the actual COP in step S103 will be described taking the case where the control target device 202 is the energy supply device A as an example.
The COP calculation unit 141 integrates e ⁱⁿ _A (t) and e ^out _A (t) from the previous time T _i-1 to the current T _i as shown in the equations (1) and (2), respectively, T energy consumption ^E _in a _(T i) of the _i, to calculate production amount of energy ^E _out a a _{(T i).}

In the expressions (1) and (2), e ⁱⁿ _A (t) and e ^out _A (t) are the power consumption [unit: kW] and the power consumption [unit: kW] of the energy supply device A, respectively. kW]. T represents a time interval [unit: hour] from the previous time T _i-1 to the current T _i . Note that the units of the production energy amount E ^out _A (T _i ) and the consumed energy amount E ⁱⁿ _A (T _i ) are kWh, respectively.

The COP calculation unit 141 divides the production energy amount E ^out _A (T _i ) of the current T _{i by} the energy consumption amount E ⁱⁿ _A (T _i ), as shown in the equation (3), so that the energy supply device A COP _A (T _i ) that is the COP of the above is calculated.

Next, a display example of COP according to the present embodiment will be described.
FIG. 4 is a diagram showing a display example 171 of the COP time transition according to the present embodiment. In FIG. 4, the vertical axis and the horizontal axis indicate the COP and time, respectively, and the thick solid line indicates the actual COP from the start time 0:00 of the evaluation period to the present. A thick broken line extending in the horizontal direction indicates the set COP. The set COP is a reference value of the initially set COP. In the example shown in FIG. 4, the actual COP is higher than the initially set COP, but decreases with the passage of time and is currently lower than the set COP. In this way, the trend of the actual COP over time and the level of the set COP are expressed. Two thin broken lines extending in the horizontal direction indicate the highest COP and the lowest COP in order from the top of the drawing. These two broken lines indicate the COP range from the start time of the evaluation period to the present.

  FIG. 5 is a diagram showing a display example 172 of the load factor dependency of the COP according to the present embodiment. In FIG. 5, the ordinate and the abscissa indicate the COP and the load factor, respectively, and the thick solid line indicates the actual COP observed from the start time of the evaluation period to the present. A thick broken line indicates the set COP. A thick broken line extending in the horizontal direction indicates the set COP. The two thin broken lines extending in the horizontal direction indicate the highest COP and the lowest COP, respectively, and the three thin broken lines extending in the vertical direction are, in order from the left with respect to the drawing, the output lower limit value of the load factor, the current output value, Indicates the output upper limit value. In the example shown in FIG. 5, the actual COP increases as the load factor increases within a predetermined range close to the output lower limit value. However, the actual COP has the highest value between the output lower limit value and the output upper limit value. . As the load factor increases further, the actual COP decreases. Currently, the load factor (current output value) is closer to the output lower limit value than the output upper limit value, the actual COP is lower than the set COP, and the COP can be increased by further increasing the load factor. . In this manner, the trend of the load factor dependency of the actual COP and the level of the load factor giving the set COP are expressed. Note that the display control unit 16 can use the actual value of the load factor indicated by the operation information of the control target device 202 indicated by the process data 111 as the actual value of the load factor at each time.

Next, the marginal cost calculation process according to the present embodiment will be described.
FIG. 6 is a flowchart showing the marginal cost calculation process according to the present embodiment.
(Step S <b> 201) The input unit 12 acquires the evaluation period data 131, and the input control unit 121 stores the evaluation period data 131 acquired by the input unit 12 in the setting input data storage unit 13. Thereby, an evaluation period and a time interval for primary energy calculation, which are the basis of the marginal cost calculation, are set. Note that the input unit 12 may perform one of the processing in step S101 and the processing in step S201, and omit the other processing. In the set evaluation period, the energy management device 1 repeats the processes of steps S201 to S204 at the set time interval, and after the evaluation period ends, the process shown in FIG. 6 ends.

(Step S <b> 202) The arithmetic processing unit 14 reads model parameter data 133 from the setting input data storage unit 13, and COP data 151 and marginal cost data 152 from the calculation result storage unit 15. Thereafter, the process proceeds to step S203.
(Step S203) The marginal cost calculation unit 142 calculates the current marginal cost (actual marginal cost) of the control target device 202 from the unit price of energy indicated by the model parameter data 133 and the current actual COP indicated by the COP data 151. The marginal cost calculation unit 142 determines the maximum marginal cost and the minimum marginal cost using the same method as in steps S104 to S107. Thereafter, the process proceeds to step S204.

(Step S204) The limit cost calculation unit 142 stores the calculated actual limit cost, the updated maximum limit cost, and limit cost data 152 indicating the minimum limit cost in the calculation result storage unit 15. The display control unit 16 causes the display unit 17 to display the actual limit cost, the maximum limit cost, and the minimum limit cost indicated by the limit cost data 152 read from the calculation result storage unit 15. Thereafter, the process returns to step S202.

Next, the calculation method of the performance limit cost in step S203 will be described by taking the case where the control target device 202 is the energy supply device A as an example.
The marginal cost calculation unit 142 divides p _A (T _i ) by COP _A (T _i ) and divides p _A (T _i ) by the actual marginal cost CC _A (T _i ) of the current T _i as shown in Expression (4). ) [Unit: Yen / kWh] is calculated.

In the formula (4), p _A (T _i ) indicates the energy unit price [unit: yen / kWh] of the energy supply device A at the current T _i .

Next, a display example of the marginal cost according to the present embodiment will be described.
FIG. 7 is a diagram showing a display example 173 of the time transition of the marginal cost according to the present embodiment. The marginal cost shown in FIG. 7 is an example in the case where the control target device 202 is an absorption refrigerator (ABR: Absorption Refrigerator). ABR uses a gas whose energy unit price does not change over time as fuel. In FIG. 7, the vertical axis and the horizontal axis indicate the limit cost and time, respectively, and the thick solid line indicates the actual limit cost from the start time 0:00 of the evaluation period to the present. The alternate long and short dash line extending in the horizontal direction indicates the set limit cost. The set limit cost is a limit value reference value obtained by dividing the energy unit price by the set COP. In the example shown in FIG. 7, the actual limit cost is equal to the initially set limit cost, but decreases with the passage of time, increases again, and is currently higher than the set limit cost. The trend of the actual marginal cost over time and the level with the set marginal cost are shown. Further, two thin one-dot chain lines extending in the horizontal direction indicate the highest limit cost and the lowest limit cost in order from the top with respect to the drawing. These two broken lines indicate the range of the marginal cost from the start time of the evaluation period to the present. The maximum limit cost and the minimum limit cost are limit costs calculated by the limit cost calculation unit 142 by dividing the energy unit price by the minimum COP and the maximum COP, respectively. The user who has visually recognized the maximum limit cost and the minimum limit cost can grasp the range of the limit cost that can vary depending on the operation state.

As described above, the energy management device 1 according to the present embodiment includes the process data acquisition unit 101 that sequentially acquires process data having operation information of one or a plurality of control target devices 202. The energy management device 1 also includes a marginal cost calculation unit 142 that calculates the marginal cost of the control target device 202 based on the process data.
With this configuration, an administrator who is in contact with the marginal cost that is sequentially calculated can easily confirm the device or timing for performing operation correction. For example, the administrator can determine the device or timing at which the device efficiency that is an element of the marginal cost should be increased, or the device or timing at which the energy unit price is lower. Therefore, even if the operation plan value is not necessarily derived, the operation correction according to the operation status of the control target device 202 is possible.

In addition, the energy management device 1 includes a display control unit 16 that causes the display unit 17 to display the actual value of the marginal cost.
With this configuration, the actual value of the marginal cost calculated sequentially is displayed on the display unit 17, so that the manager visually recognizes the actual value of the displayed marginal cost, or corrects the operation at that point in time. Timing can be easily determined.

(Second Embodiment)
Next, a second embodiment will be described. About the same structure as embodiment mentioned above, the same code | symbol is attached | subjected and the description is used. The energy management device 1 according to the energy management system S1 (FIG. 1) according to the present embodiment has a configuration described below.

FIG. 8 is a schematic block diagram showing the configuration of the energy management device 1 according to the present embodiment.
The calculation processing unit 14 according to the present embodiment includes a COP calculation unit 141, a marginal cost calculation unit 142, a priority calculation unit 143, a demand prediction unit 144, an operation planning unit 145, and a device control setting output unit 146. Prepare. The calculation processing unit 14 reads the limit cost data 152 from the calculation result storage unit 15.

  The priority calculation unit 143 determines a priority for each control target device 202 indicated by the plant model data 132 based on the limit cost data 152. The priority order indicates the order in which the operation is prioritized over other devices. The priority calculation unit 143 determines a higher priority for the control target device 202 having a lower limit cost indicated by the limit cost data. In the priority determination, the priority calculation unit 143 uses the actual limit cost for the controlled device 202 that is operating, and uses the set limit cost or the maximum limit cost for the controlled device 202 that is not operating.

  Further, the priority order calculation unit 143 may set the priority order indicated by the input signal from the input control unit 121 as the priority order of all or a part of the control target devices 202 of the energy supply facility 2. This input signal is generated in response to an operation of a user who monitors the limit cost displayed on the display unit 17 by the input unit 12. The priority order calculation unit 143 generates priority order data 153 indicating the priority order for each control target device 202 that has been determined. Note that the priority order calculation unit 143 may include, in the priority order data 153, the control target device 202 that cannot operate and the operation device information indicating the presence or absence of the operation at that time. Then, the inoperable control target device 202 may be excluded from targets for which priority is determined. Here, the priority calculation unit 143 may extract failure information from the operation information of the control target device 202 indicated by the process data 111, and determine the control target device 202 that cannot operate based on the failure information. The presence or absence of the operation of the control target device 202 may be determined from the operation information. The priority calculation unit 143 stores the generated priority data 153 in the calculation result storage unit 15.

  Based on the energy demand record of the customer 3 indicated by the process data 111, the demand prediction unit 144 calculates a predicted value of the amount of energy demand by the customer 3 at predetermined time intervals (demand prediction). The demand prediction unit 144 generates demand prediction data 154 indicating the predicted value of the calculated demand amount. For example, as a demand forecast for each month, the demand prediction unit 144 may calculate an average value of energy demand for each month in the past year up to that point (current) for each time within a day. Thereby, the time change of the average daily energy demand for one month is calculated. The demand prediction unit 144 may calculate the predicted value of demand using an autoregressive model instead of calculating the average value of energy demand over the past year as a predicted value (using a moving average model). . The demand prediction unit 144 stores the generated demand prediction data 154 in the calculation result storage unit 15 and outputs it to the operation planning unit 145.

  The operation planning unit 145 calculates the operation plan value of the energy supply plant apparatus installed in the energy supply plant 2 based on the plant model data 132, the model parameter data 133, and the demand prediction data 154 input from the demand prediction unit 144. To do. The operation plan unit 145 calculates an operation plan value that satisfies the following condition and that lowers the energy cost of the entire energy supply device 2. The condition is that the predicted value of the demand amount indicated by the demand prediction data 154 is satisfied and the operation constraint condition represented by the model parameter data 133 for each control target device 202 indicated by the plant model data 132 is satisfied. The operation plan value is an output value targeted for the energy supplied by the operation of the control target device 202. The operation plan value is, for example, a work rate of production energy. The operation planning unit 145 can use a so-called optimization algorithm such as mathematical programming or heuristics as a method for calculating the operation plan value. The operation plan unit 145 generates operation plan data 155 indicating the calculated operation plan value, and stores the generated operation plan data 155 in the calculation result storage unit 15.

  The device control setting output unit 146 reads the operation plan data 155 from the calculation result storage unit 15. The device control setting output unit 146 determines a setting value (control setting) for controlling the operation of the energy supply plant 2 of the energy supply plant 2 based on the operation plan value indicated by the operation plan data 155. The control setting includes, for example, a setting related to an output at start, stop, or operation or a set value thereof. The device control setting output unit 146 determines a control setting according to the demand prediction indicated by the demand prediction data 154 according to the priority indicated by the priority order data 153. In addition, the device control setting output unit 146 further determines a control setting that satisfies the operation constraint condition indicated by the model parameter data 133. The device control setting output unit 146 generates device control setting output data 156 indicating the determined control setting. The device control setting output unit 146 stores the generated device control setting output data 156 in the calculation result storage unit 15 and outputs it to the communication unit 10 to be transmitted to the energy supply plant 2. In the energy supply plant 2, the control target device 202 controls the operation using the control setting indicated by the received control setting output data.

The calculation result storage unit 15 further stores priority order data 153, demand prediction data 154, operation plan data 155, and device control setting output data 156.
The priority order data 153 is data indicating a priority order for each control target device 202 installed in the energy supply plant 2. The priority order data 153 indicates, for example, a setting value for the device priority order for each hour.
The demand prediction data 154 is data indicating a demand prediction value for each load of the consumer 3. The demand prediction data 154 indicates, for example, predicted values of power load, cold load, heat load and steam load every hour.

The operation plan data 155 is data indicating an operation plan value for each control target device 202 installed in the energy supply plant 2. The operation plan data 155 is data indicating operation plan values such as production energy for each hour in each control target device 202, start, stop, and output level during operation, for example.
The device control setting output data 156 is data indicating a control setting for each control target device 202 installed in the energy supply plant 2. The device control setting output data 156 is data indicating an operation plan value such as an output level at the start, stop, and operation of each control target device 202 every predetermined time (for example, 1 hour), for example.

  The display control unit 16 sequentially reads the priority order data 153 from the calculation result storage unit 15 and generates display data that represents the priority order indicated by the read priority order data 153 in a predetermined display form. The display control unit 16 displays the priority order by outputting the generated display data to the display unit 17. For example, various display forms such as a table form and a graph form can be used. The display control unit 16 displays the demand forecast value indicated by the demand forecast data 154, the operation plan value indicated by the operation plan data 155, the control set value indicated by the device control setting output data 156, and other calculation results on the display unit 17. You may let them.

  The operation plan value indicated by the operation plan data 155 includes the work rate of consumed energy and the work rate of production energy. Therefore, the COP computing unit 141 uses the power consumption work rate and the production energy work rate indicated by the operation plan data 155 instead of the power consumption work rate and the production energy work rate indicated by the process data 111 to predict the COP. A value (predicted COP) is calculated. The COP calculation unit 141 adds data indicating the calculated predicted COP to the COP data 151 and stores the added COP data 151 in the calculation result storage unit 15. In addition, the marginal cost calculation unit 142 calculates a predicted value of the marginal cost (predicted marginal cost) using the predicted COP instead of the actual COP. The COP calculation unit 141 adds data indicating the calculated predicted limit cost to the limit cost data 152, and stores the added limit cost data 152 in the calculation result storage unit 15.

Next, the marginal cost calculation process according to the present embodiment will be described.
FIG. 9 is a flowchart showing the marginal cost calculation process according to the present embodiment. The marginal cost calculation process according to the present embodiment includes steps S302 to S309. Since the process of step S303 and S304 is the same as the process of step S103 and S203, respectively, the description is used.

(Step S301) The input unit 12 acquires the evaluation period data 131, and the input control unit 121 stores the evaluation period data 131 acquired by the input unit 12 in the setting input data storage unit 13. The arithmetic processing unit 14 reads plant model data 132 and model parameter data 133 from the setting input data storage unit 13, and COP data 151 and marginal cost data 152 from the calculation result storage unit 15. In the set evaluation period, the energy management device 1 repeats the processes of steps S301 to S309 at the set time interval, and ends the process shown in FIG. 9 after the evaluation period ends.

(Step S302) Based on the energy demand record of the customer 3 indicated by the process data 111, the demand forecasting unit 144 performs demand forecast data 154 indicating the demand forecast calculated by the demand forecast of energy by the customer 3 at predetermined time intervals. Is generated. The demand prediction unit 144 outputs the generated demand prediction data 154 to the operation planning unit 145. Thereafter, the process proceeds to step S303. The energy management apparatus 1 proceeds to step S305 after completing the processes of steps S303 and S304.

(Step S <b> 305) The priority calculation unit 143 calculates a priority for each control target device 202 indicated by the plant model data 132 based on the limit cost data 152. The priority order calculation unit 143 generates priority order data 153 indicating the priority order for each control target device 202 that has been determined. Thereafter, the process proceeds to step S306.

(Step S306) The operation planning unit 145 operates the energy supply plant apparatus installed in the energy supply plant 2 based on the plant model data 132, the model parameter data 133, and the demand prediction data 154 input from the demand prediction unit 144. Calculate the planned value. The operation plan unit 145 generates operation plan data 155 indicating the calculated operation plan value. Thereafter, the process proceeds to step S307.

(Step S307) The COP calculation unit 141 calculates a predicted COP based on the operation plan value indicated by the operation plan data 155. The COP calculation unit 141 adds data indicating the calculated predicted COP to the COP data 151. The marginal cost calculation unit 142 calculates a predicted value of the marginal cost using the calculated prediction COP. In addition, the marginal cost calculation unit 142 calculates a predicted value of the marginal cost (predicted marginal cost) using the predicted COP instead of the actual COP. The marginal cost calculation unit 142 adds data indicating the calculated predicted marginal cost to the marginal cost data 152. Thereafter, the process proceeds to step S308.

(Step S308) The arithmetic processing unit 14 stores the COP data 151, the marginal cost data 152, the priority order data 153, the demand forecast data 154, the operation plan data 155, and the equipment control setting output data 156 indicating the above calculation results. Store in unit 15. The display control unit 16 reads the data stored in the calculation result storage unit 15 and outputs the read data to the display unit 17 to display the calculation result indicated by the data (display update). Thereafter, the process proceeds to step S309.

(Step S309) The equipment control setting output unit 146 determines the control setting of the energy supply plant 2 of the energy supply plant 2 based on the operation plan value indicated by the operation plan data 155. The device control setting output unit 146 generates device control setting output data 156 indicating the determined control setting. The device control setting output unit 146 stores the generated device control setting output data 156 in the calculation result storage unit 15 and outputs it to the communication unit 10 to be transmitted to the energy supply plant 2. Thereafter, the process returns to step S302.

Next, a display example of COP according to the present embodiment will be described.
FIG. 10 is a diagram showing a display example 178 of the COP time transition according to the present embodiment. In the display example 178, the predicted COP calculated by the COP calculation unit 141 is added to the display example 171 (FIG. 4). In FIG. 10, the actual COP is represented by a solid line, whereas the predicted COP is represented by a broken line, and the current time is represented by a broken line extending in the vertical direction. Therefore, the time change of the actual COP and the time change of the predicted COP are clearly distinguished. FIG. 10 shows that the predicted COP increases at a later time than the current time and becomes higher than the set COP.

Next, a display example of the marginal cost according to the present embodiment will be described.
FIG. 11 is a diagram showing a display example 179 of the time transition of the marginal cost according to the present embodiment. In the display example 179, the predicted marginal cost calculated by the marginal cost calculation unit 142 is added to the display example 173 (FIG. 7). In FIG. 11, the actual marginal cost is represented by a solid line, whereas the predicted marginal cost is represented by a broken line, and the current time is represented by a broken line extending in the vertical direction. Therefore, the time change of the performance marginal cost and the time change of the prediction marginal cost are clearly distinguished. FIG. 11 shows that the prediction limit cost increases at a time later than the present time and is lower than the set limit cost.

As described above, in the energy management device 1 according to the present embodiment, the process data 111 includes information regarding energy demand as operation information of the control target device 202. Further, the energy management device 1 includes a demand prediction unit 144 that calculates a demand prediction value of energy of the control target device 202 based on the process data 111, and a control target device arranged in the energy supply plant 2 based on the demand prediction value. An operation plan unit 145 that calculates an operation plan value of 202 is provided.
With this configuration, the administrator who is in contact with the calculated operation plan value can determine whether or not the operation correction is required for the control target device 202 and its content based on the operation plan value.

Further, the marginal cost calculation unit 142 calculates a predicted value of the marginal cost of the control target device 202 based on the calculated operation plan value.
With this configuration, the administrator who is in contact with the calculated predicted value of the marginal cost can determine whether or not to modify the operation of the control target device 202 in consideration of the future trend of the marginal cost change.

(Third embodiment)
Next, a third embodiment will be described. About the same structure as embodiment mentioned above, the same code | symbol is attached | subjected and the description is used.
FIG. 12 is a schematic block diagram showing the configuration of the energy management system S1 according to the present embodiment. The energy management system S <b> 1 includes an energy management device 1, an energy supply plant 2, and a customer 3. The energy management device 1 according to the present embodiment has a configuration similar to the configuration shown in FIG.

  The energy supply plant 2 includes a power receiving facility 211, a PV (Photo Voltaics; photovoltaic power generation facility) 212, a storage battery 213, a water-cooled chiller 221, an air-cooled HP (Heat Pump) chiller 222, and a heat as a control target device 202. A recovery HP chiller 223, an ABR (Absorption Refrigeration) 224, a cooling / heating tank 225, a CGS (Co-Generation Refrigeration; cogeneration system) 231, a boiler 232, and a heating tank 233 are provided.

  The power receiving facility 211 receives power from the business facility of the power provider and converts the voltage of the received power into a predetermined voltage. The power receiving facility 211 transmits the electric power obtained by converting the voltage to the storage battery 213, the water-cooled chiller 221, the air-cooled HP chiller 222, and the heat recovery HP chiller 223.

  PV212 is a power generation facility provided with a solar panel. A solar panel is a member that converts light energy of received light into electrical energy. The PV 212 transmits the generated power to the storage battery 213, the water-cooled chiller 221, the air-cooled HP chiller 222, and the heat recovery HP chiller 223.

  The storage battery 213 is a power storage facility including a secondary battery. The secondary battery can perform both charging and discharging. The storage battery 213 charges the power received from at least one of the power receiving equipment 211, the PV 212, and the CGS 231, and transmits the charged power to the customer 3.

  The water-cooled chiller 221 is a device that supplies cold water by changing the phase of a refrigerant using water as a heat source. The water-cooled chiller 221 consumes the electric power received from at least one of the power receiving equipment 211, the PV 212 and the CGS 231 as an energy source, and supplies the produced cold water to the cold heat tank 225.

  The air-cooled HP chiller 222 is a device that supplies cold water or hot water by using a phase change of a refrigerant using air as a heat source. The air-cooled HP chiller 222 consumes electric power received from at least one of the power receiving equipment 211, PV 212, and CGS 231 as an energy source, supplies the generated cold water to the cold water tank 225, and supplies the generated hot water to the hot water tank 233.

  The heat recovery HP chiller 223 is a device that supplies cold water and hot water by a phase change of the refrigerant using air, water, or other medium as a heat source. The heat recovery HP chiller 223 includes a plurality of heat exchangers that perform heat exchange using a heat source and a separate heat exchanger that performs heat exchange between the plurality of heat exchangers. The heat recovery HP chiller 223 consumes power received from at least one of the power receiving equipment 211, PV 212, and CGS 231 as an energy source, supplies the generated cold water to the cold water tank 225, and supplies the generated hot water to the hot water tank 233. .

  The ABR 224 is a device that supplies cold water using water vapor as a refrigerant. The ABR 224 includes a condenser and an evaporator, and performs a regeneration process in which the refrigerant evaporated by the evaporator is absorbed by the absorption liquid, the absorption liquid is heated to evaporate the refrigerant, and returned to the condenser. In the regeneration process, the pressure decreases due to the absorption of the refrigerant and the refrigerant is vaporized, so that a low temperature can be obtained. The ABR 224 consumes fuel as an energy source and supplies cold water to the cold heat tank 225. The fuel is gas, biomass fuel or the like.

  The cold heat tank 225 performs heat storage by accumulating cold water supplied from the water-cooled chiller 221, the air-cooled HP chiller 222, the heat recovery HP chiller 223, and the ABR 224 as a heat medium. The cold heat tank 225 supplies cold heat to the customer 3 by sending out the accumulated cold water.

  The CGS 231 is a facility that generates power using fuel as an energy source and generates a heat medium using heat generated by the power generation. The CGS 231 includes an internal combustion engine or an external combustion engine. The CGS 231 transmits the generated power to the storage battery 213, the water-cooled chiller 221, the air-cooled HP chiller 222, and the heat recovery HP chiller 223, and supplies hot water as the generated heat medium to the hot water tank 233.

The boiler 232 generates hot water or steam using fuel as an energy source and a heat medium. The boiler 232 supplies the generated hot water to the hot water tank 233 and supplies steam to the customer 3.
The hot water tank 233 performs heat storage by accumulating hot water supplied from the air-cooled HP chiller 222, the heat recovery HP chiller 223, the CGS 231 and the boiler 232 as a heat medium. The hot water tank 233 supplies hot heat to the consumer 3 by sending out the accumulated hot water.

  The customer 3 includes an electric power load 31, a cooling load 32, a heating load 33, and a steam load 34. The electric power load 31, the cold load 32, the hot load 33, and the steam load 34 consume electric power, cold heat, hot heat, and steam supplied from the energy supply plant 2, respectively.

Next, the marginal cost calculation process according to the present embodiment will be described.
FIG. 13 is a flowchart showing the marginal cost calculation process according to the present embodiment.
The marginal cost calculation process according to the present embodiment includes steps S201 to S206. The above description is used for the processing of steps S201 to S204 (FIG. 6). In the process illustrated in FIG. 13, the processes in steps S202 to S206 are repeated every predetermined time (for example, one hour). In addition, after the processing of steps S202 and S203 is completed, the process proceeds to step S205.

(Step S205) The priority order calculation unit 143 is based on the actual limit cost of each control target device 202 currently operating, and the set limit cost, the maximum limit cost, and the minimum limit cost of each of the other control target devices 202. Then, it is determined whether or not there is a priority update merit. The update merit means that further reduction in energy cost and device efficiency is expected by controlling the operation based on the priority order exchanged between the control target devices 202. When there is a set of control target devices 202 determined to have an update merit (YES in step S205), the process proceeds to step S206. When it is determined that there is no update merit between any of the control target devices 202 (NO in step S205), the process proceeds to step S204.
(Step S206) The display control unit 16 causes the display unit 17 to issue an alarm. The display control unit 16 displays an alarm screen by outputting image data of a predetermined alarm screen to the display unit 17 as an alarm notification, for example. Thereafter, the process proceeds to step S204.

Next, an example of determining whether there is an update merit will be described. Here, between the two energy supply devices A and B as the control target devices 202 that supply the same type of energy, the operating energy supply device A is more set than the stopped energy supply device B. Assume that the cost is low. In that case, as shown in Expressions (5) and (6), the priority order calculation unit 143 determines that the actual marginal cost CC ^now _A (T _i ) of the energy supply device A at the current time T _i is CC ^min _B (T _i). ) Or CC ^max _B (T _i ), it is determined that there is an update merit.
CC ^now _A (T _i )> CC ^min _B (T _i ) (5)
CC ^now _A (T _i )> CC ^max _B (T _i ) (6)

In the formulas (5) and (6), CC ^min _B (T _i ) and CC ^max _B (T _i ) are the minimum limit cost of the energy supply device B and the maximum limit cost of the energy supply device B at the current time T _i , respectively. Indicates.
Note that, in determining whether there is an update merit, the energy supply device B to be compared may also be in operation. Moreover, the priority calculation part 143 may determine the presence or absence of an update merit among the three or more control target apparatuses 202 at a time.

Further, the display control unit 16 may display an alarm having a higher expressive power as the degree of expected update merit is higher. For example, when it is determined that the relationship of Expression (5) is satisfied, the display control unit 16 outputs image data of a predetermined alarm notice screen to the display unit 17. Since an alarm notice screen is displayed on the display unit 17, a situation in which there is a possibility that there is an update merit of the device priority order is notified. When it is determined that the relationship of Expression (6) is satisfied, the display control unit 16 outputs predetermined image data of the alarm screen to the display unit 17. Since this alarm screen is displayed on the display unit 17, a situation in which there is a certainty of updating the priority of the device priority is notified.
The display control unit 16 may reproduce the alarm sound by outputting a sound signal of a predetermined alarm sound to a loudspeaker (not shown).

Next, a display example of the marginal cost according to the present embodiment will be described.
FIG. 14 is a diagram showing a display example 174 of the time transition of the marginal cost according to the present embodiment. The display example 174 shows the maximum limit cost, the minimum limit cost, and the set limit cost of the water-cooled chiller 221 and ABR 224, respectively. For the water-cooled chiller 221 in operation, the actual limit cost calculated by the limit cost calculation unit 142 is further shown. However, in this example, since the operation of the ABR 224 is stopped, the actual limit cost of the ABR 224 is not shown.

  In the example illustrated in FIG. 14, the set limit cost related to the ABR 224 is constant regardless of the time, and is higher than the set limit cost related to the water-cooled chiller 221 that has time dependency. The priority calculation unit 143 determines that the priority of the water-cooled chiller 221 determined based on the set limit cost is higher than the priority of the ABR 224. For the water-cooled chiller 221, the set limit cost in the time zone from 8 o'clock to 20 o'clock is higher than the set limit cost in the time zone from 0 o'clock to 8 o'clock and from 20 o'clock to 24 o'clock It approximates by the setting limit cost concerning ABR224. This is because the ABR 224 uses gas having a constant energy unit price as an energy source, whereas the water-cooled chiller 221 uses electric power whose energy unit price varies with time. For each time zone in which the set limit cost is constant, the limit cost calculation unit 142 calculates the maximum limit cost and the minimum limit cost. As a premise thereof, the COP calculation unit 141 calculates the highest COP and the lowest COP for each time period in which the set limit cost is constant.

  The actual marginal cost of the water-cooled chiller 221 fluctuates slowly while approximating the set marginal cost from 0 to 8 o'clock, but suddenly rises at 8 o'clock and continues to rise thereafter. At present, the ABR 224 Higher than the maximum marginal cost. When the water-cooled chiller 221 and ABR 224 are energy supply devices A and B, respectively, the conditions shown in the equations (5) and (6) are satisfied. Therefore, the priority calculation unit 143 determines that there is a merit of changing the priority of the ABR 224 to be higher than the priority of the water-cooled chiller 221. Based on this determination, the display control unit 16 causes the display unit 17 to issue an alarm.

Next, priority order calculation processing according to the present embodiment will be described.
FIG. 15 is a flowchart showing priority order calculation processing according to the present embodiment.
(Step S401) The input unit 12 acquires the evaluation period data 131, and the input control unit 121 stores the evaluation period data 131 acquired by the input unit 12 in the setting input data storage unit 13. The arithmetic processing unit 14 reads the plant model data 132 from the setting input data storage unit 13. In the set evaluation period, the energy management apparatus 1 repeats the processes of steps S402 to S406 at the set time interval, and after the evaluation period ends, the process shown in FIG. 15 ends.

(Step S <b> 402) The priority order calculation unit 143 reads the limit cost data 152 from the calculation result storage unit 15. Thereafter, the process proceeds to step S403.
(Step S403) The priority calculation unit 143 calculates the priority for each control target device 202 among the control target devices 202 having the same type of supply energy, based on the read limit cost data 152. The priority order calculation unit 143 calculates when there is a priority order update merit. In addition, when an input signal is input from the input control unit 121, the priority order calculation unit 143 may set the priority order of each control target device 202 to the priority order indicated by the input signal. The input signal is generated by an operation of a user who observes the limit cost and priority displayed on the display unit 17 in the input unit 12. Thereafter, the process proceeds to step S404.

(Step S404) The priority calculation unit 143 determines whether or not to update to the priority set in step S403. Here, the display control unit 16 outputs change inquiry screen data indicating whether or not to change the priority order to the display unit 17 to display the change inquiry screen. As a result, the user determines whether or not to update the priority order, and prompts an operation input related to the determination. When the input signal indicating the update of the priority order is input, the priority order calculation unit 143 determines to update (YES in Step S404), and proceeds to Step S405. When an input signal indicating that priority order is not updated is input, the priority order calculation unit 143 determines not to update (NO in step S404), skips steps S405 and S406, and returns to step S402.

(Step S405) The priority calculation unit 143 generates update priority data 153 indicating the priority changed in step S403. Thereafter, the process proceeds to step S406.
(Step S406) The priority order calculation unit 143 updates the priority order data 153 stored in the calculation result storage unit 15 to the generated priority order data 153. The display control unit 16 reads the updated priority order data 153 from the calculation result storage unit 15, and outputs the read priority order data to the display unit 17, thereby displaying the updated priority order for each control target device 202. Then, it returns to step S402.

Next, the time transition of the priority order according to the present embodiment will be described.
FIG. 16 is a diagram showing a display example 175 of the time transition of the priority order according to the present embodiment.
The display example 175 indicates the priority for each device for each time zone. This time zone is a time zone having a predetermined time width (one hour) whose end point is the time at which the priority order calculation unit 143 determines the priority order. According to the set limit cost shown in FIG. 14, the priorities of the ABR 224 and the water-cooled chiller 221 are 2 and 1 in each time zone. FIG. 16 shows that the priority order of the ABR 224 and the water-cooled chiller 221 has been changed to 1 and 2 in the time zone from 13:00 to 14:00 by user operation input due to the alarm notification. The user in contact with the alarm can determine which control target device 202 is to be preferentially operated based on the marginal cost and the priority order determined based on the marginal cost.

  FIG. 16 illustrates an example in which the common control target devices 202 are the ABR 224 and the water-cooled chiller 221 in that the type of supplied energy is cold, but the present invention is not limited to this. The display control unit 16 may further cause the display unit 17 to display the priority of either the air-cooled HP chiller 222 or the heat recovery HP chiller 223 or both. Further, the display control unit 16 may display the priority of the control target device 202 whose current or average priority is higher than a predetermined priority in preference to the priority of other control target devices 202. In the above description, the priority order data 153 is assumed to be processed assuming that electric power, cold energy, thermal energy, and steam are different types of energy, but is not limited thereto. Priority data 153 may treat the energy in the set of cold and hot, the energy in the set of heat and steam, the energy in the set of cold, hot and steam, and the energy in the set of steam, each as a common energy type. Good. In the priority order data 153, the user can set whether to process power, cold, heat, and steam separately as energy types, or to process energy in any set as a common energy type. Also good.

As described above, the energy management apparatus 1 according to the present embodiment controls the control target device 202 having a small actual value of the marginal cost as the operation priority among the plurality of control target devices 202 having the same type of supply energy. A priority calculation unit 143 that sets a higher priority is provided.
With this configuration, the control target device 202 having a smaller actual value of the marginal cost operates with higher priority, so that the energy cost of the entire energy management system S1 can be reduced.

Moreover, the priority calculation part 143 determines the presence or absence of the update merit of a priority based on each limit cost and operation state of several control object apparatus 202. FIG.
When it is determined that there is an update merit, by notifying that effect, the administrator can be aware of the timing for performing the operation correction regarding the priority order.

The energy management device 1 further includes a display control unit 16 that displays the priority order determined by the priority order computation unit 143.
With this configuration, the administrator can determine whether or not the operation correction of the priority order is necessary by confirming the displayed priority order.

Moreover, the priority order calculating unit 143 changes the priority order determined among the plurality of control target devices 202 designated by the operation input.
With this configuration, it is possible to correct the operation of the priority order among the control target devices 202 in the human system according to the operation of the administrator.

When the priority calculation unit 143 determines that there is a priority update merit, the display control unit 16 causes the display unit 17 to display a priority change request screen.
With this configuration, the administrator notices the timing when the priority order update merit occurs, and the priority order is changed by the operation of the administrator, so that it is possible to avoid an operation modification contrary to the intention of the administrator.

(Fourth embodiment)
Next, a fourth embodiment will be described. About the same structure as embodiment mentioned above, the same code | symbol is attached | subjected and the description is used.
FIG. 17 is a schematic block diagram showing the configuration of the energy supply system S1C according to the present embodiment. The energy supply system S1C includes an energy management system S1, a monitoring control server 5, an external communication server 6, and a DR (Demand Response) server 8. The external communication server 6 and the DR server 8 are connected by an external network 7. The external network 7 is a network that can transmit and receive various types of data independently of the internal network 4. The external network 7 is, for example, a wide area network (WAN) such as the Internet.

The monitoring control server 5 is connected to the internal network 4, monitors the operating state of the energy management system S1, and controls the operation of the energy management system S1 according to the operating state.
The external communication server 6 is a server device that is connected to the internal network 4 and the external network 7 and relays data between both networks. The external communication server 6 receives the DR data 112 from the DR server 8 via the external network 7 and transmits the received DR data 112 to the energy management apparatus 1. The DR data 112 will be described later.

The DR server 8 is a server device that transmits the DR data 112 to the energy management device 1 via the external network 7, the external communication server 6, and the internal network 4.
The DR data 112 is data indicating information on the cost of energy supplied when a consumer responds to DR provided by an electric power provider that is an energy supplier. DR changes the power consumption pattern so that the consumer can suppress the use of power according to the setting of power charges or payment of incentives when the wholesale market price of energy rises or the reliability of the system decreases. Means that.

  DR includes incentive based DR (Incentive based DR programs) and power rate based DR (Time based DR programs). Incentive-based DR means that an electric power provider provides a reward (incentive) for a load reduction (including interruption) by a consumer in a time zone in which power supply and demand is tight. Incentives include forms such as payment of compensation money from electric power providers to consumers and discounts on electric power charges. The amount of the incentive may be a predetermined fixed amount (fixed amount system), or may be a time zone, a reduction amount, or a different amount (a pay-as-you-go system) according to the reduction amount. Therefore, the DR data 112 related to DR based on incentives is data indicating a calculation standard (menu) of the amount of incentive applied when the customer 3 responds to DR. In the following description, an example in which the incentive is a cost that can be reduced by reducing power consumption when the DR is supported, compared to when the DR is not compliant.

  In addition, DR based on the electricity rate sets the electricity rate when the power provider is tight in power supply and demand, by setting it lower than the electricity rate in the time zone when there is a margin for electricity supply and demand. It means to promote the reduction of the load at the time of tightness. Therefore, the DR data related to the power rate based DR is data indicating the calculation standard of the power rate for each time zone applied to the consumer 3. That is, the DR data 112 related to the power rate based DR is data indicating the energy unit price for each time zone. In the DR data 112 related to the power rate based DR, the incentive is expressed as a cost that can be reduced by reducing energy consumption in a time zone when the power supply and demand is more tight than when the power supply and demand is moderate.

Next, the configuration of the energy management device 1 according to the present embodiment will be described.
FIG. 18 is a schematic block diagram showing the configuration of the energy management device 1 according to this embodiment. The communication unit 10 receives the DR data 112 from the DR server 8 via the external network 7, the external communication server 6, and the internal network 4. The communication unit 10 outputs the received DR data to the process data acquisition unit 101.
The process data acquisition unit 101 stores the DR data 112 input from the communication unit 10 in the process data storage unit 11.

The calculation processing unit 14 includes a COP calculation unit 141, a marginal cost calculation unit 142, a priority calculation unit 143, a demand prediction unit 144, an operation planning unit 145, a device control setting output unit 146, and a DR calculation unit 147. Is provided.
The DR operation unit 147 reads the DR data 112 from the process data storage unit 11, and calculates the energy unit price at each time when responding to the DR as a virtual hourly energy unit price based on the read DR data 112. The marginal cost calculation unit 142 calculates an actual limit cost when responding to the DR based on the virtual hourly energy unit price calculated by the DR calculation unit 147 (hereinafter, DR-corresponding actual limit cost).

Next, the marginal cost calculation process according to the present embodiment will be described.
FIG. 19 is a flowchart showing a marginal cost calculation process according to the present embodiment. The marginal cost calculation process according to the present embodiment includes steps S301 to S303, S305 to S309, S311 and S312. The description of FIG. 9 is used for the processes of steps S301 to S303 and S305 to S309.
In the process illustrated in FIG. 19, after the processes of steps S301 to S303 are completed, the process proceeds to step S311.

(Step S311) The process data acquisition unit 101 acquires the DR data 112 received by the communication unit 10 from the DR server 8, and stores the acquired DR data 112 in the process data storage unit 11. Thereafter, the process proceeds to step S312.
(Step S312) The DR operation unit 147 reads the DR data 112 from the process data storage unit 11, and calculates a virtual hourly energy unit price based on the read DR data 112. An example of calculating the virtual hourly energy unit price will be described later. The marginal cost calculation unit 142 calculates a DR-corresponding marginal cost by substituting a virtual hourly energy unit price into the energy unit price p _A (T _i ) of Expression (4). The marginal cost calculation unit 142 determines the DR-corresponding maximum marginal cost and the DR-corresponding minimum marginal cost using the same method as in steps S104 to S107. The marginal cost calculation unit 142 adds the obtained DR-corresponding actual marginal cost, maximum marginal cost, and DR-corresponding minimum marginal cost to the marginal cost data 152, and stores the added marginal cost data 152 in the computation result storage unit 15. The display control unit 16 outputs the limit cost data 152 read from the calculation result storage unit 15 to the display unit 17 to display the DR-corresponding maximum limit cost, the DR-corresponding actual limit cost, and the DR-corresponding minimum limit cost. Thereafter, the process proceeds to step S305.

  In step S309, the device control setting output unit 146 may determine the control setting of the control target device 202 based on the operation plan value indicated by the input signal from the input control unit 121. The device control setting output unit 146 stores device control setting output data 156 indicating the determined control setting in the calculation result storage unit 15 and transmits it to the energy supply plant 2 via the communication unit 10. Thereby, the user who has visually recognized the DR corresponding limit cost can instruct a lower driving plan value by the operation input. Therefore, it is possible to prompt the user to make adjustments such as reducing the energy consumption of the control target device 202, increasing the energy consumption in another time zone, and increasing the energy consumption of another type of control target device 202.

In step S <b> 307, the COP calculating unit 141 calculates a DR-corresponding prediction COP based on the DR-corresponding operation plan value calculated by the operation planning unit 145, and adds the DR-corresponding prediction COP to the COP data 151. The marginal cost calculation unit 142 calculates a prediction value of the DR correspondence limit cost (DR correspondence prediction limit cost) using the DR correspondence prediction COP. The marginal cost calculation unit 142 adds the calculated predicted marginal cost to the marginal cost data 152.
In step S 308, the arithmetic processing unit 14 stores the COP data 151, the marginal cost data 152, the priority order data 153, the demand forecast data 154, and the operation plan data 155 indicating the DR-compliant arithmetic results in the arithmetic result storage unit 15. To do. The display control unit 16 outputs the data read from the calculation result storage unit 15 to the display unit 17 to update the display with various DR-compliant calculation results.

Next, an example of calculating a virtual hourly energy unit price will be described. The DR calculation unit 147 does not support the incentive expected value p ^DR (T _i ) and DR in the DR time zone as the virtual hourly energy unit price p _A ^DR (T _i ) corresponding to DR as shown in Expression (7). Energy consumption unit price p _A (T _i ).
p _A ^DR (T _i ) = p ^DR (T _i ) + p _A (T _i ) (7)
The unit of p _A ^DR (T _i ) and p ^DR (T _i ) is Yen / kWh. p ^DR (T _i ) is specified by an input signal input from the input control unit 121 in accordance with a user operation input. In addition, the DR calculation unit 147 uses the incentive charge calculation standard indicated by the DR data 112, the energy demand prediction value indicated by the demand prediction data 154, and the operation plan value indicated by the operation plan data 155 to estimate the incentive value in each DR time zone. p ^DR (T _i ) may be calculated.

Next, a display example of the DR corresponding limit cost according to the present embodiment will be described.
FIG. 20 is a view showing a display example 176 of the time transition of the DR support limit cost according to the present embodiment. The marginal cost shown in FIG. 20 is an example when the control target device 202 is a water-cooled chiller 221. The water-cooled chiller 221 uses electric power whose energy unit price changes with time as an energy source. In the example shown in FIG. 20, the set limit cost of the water-cooled chiller 221 is a value obtained by dividing the DR-compliant energy unit price by the set COP at each time. In the example shown in FIG. 20, the minimum limit cost, the set limit cost, and the maximum limit cost change according to the time dependency of the energy unit price. The marginal cost in the time zone from 8:00 to 10:00 is higher than the marginal cost in the time zone from 0:00 to 8:00 and the time zone from 20:00 to 24:00. Further, the marginal cost in the time zone from 10:00 to 14:00 is higher than the marginal cost in the time zone from 8:00 to 10:00. The marginal cost in the time zone from 14:00 to 18:00 is higher than the marginal cost in the time zone from 10:00 to 14:00. The actual limit cost is a value that approximates the set limit cost in the time zone from 0:00 to 8, but increases sharply at 8 o'clock and 10 o'clock when the set limit cost increases, and continues to increase until the present. . The user can easily grasp the increase in the marginal cost that can be reduced according to the operation status of the control target device 202 when the DR is supported.

Next, the incentive dependency of the marginal cost according to the present embodiment will be described.
FIG. 21 shows a display example 177 of the incentive dependency of the marginal cost according to the present embodiment. In FIG. 21, the vertical axis and the horizontal axis indicate the amount of marginal cost and incentive, respectively. In the example illustrated in FIG. 21, an example is given in which the DR data 112 indicates the energy unit price for each section of the energy consumption work rate and the upper limit of the incentive amount. The DR data 112 indicates a higher energy unit price in a section where the work rate of consumed energy is higher. The marginal cost calculation unit 142 divides the energy unit price indicated by the DR data 112 by the energy consumption that is the product of the work rate of the production energy of the control target device 202 (in this example, the water-cooled chiller 221) and the actual COP. The marginal cost shown in the figure can be calculated. The marginal cost calculation unit 142 calculates the amount (total amount) of incentives according to the calculated energy consumption and the energy consumption calculated based on the energy unit price indicated by the DR data 112. By visually recognizing the display example 177, the user can easily grasp that the marginal cost increases stepwise as the incentive amount increases, and the upper limit.

In the above description, the DR data 112 shows an example in which the unit price of energy is higher as the energy consumption work rate is higher in the DR time zone, and thus shows a higher unit price of energy than other time zones. Is not limited. The DR data 112 may be data indicating incentive payment or energy unit price discount made when complying with DR. In that case, when calculating the DR-compliant virtual hourly energy unit price p _A ^DR (T _i ) using Equation (7), the DR operation unit 147 is a negative incentive smaller than 0 based on the DR data 112. The expected value p ^DR (T _i ) is calculated.

As described above, in the energy management apparatus 1 according to the present embodiment, the process data acquisition unit 101 acquires DR data 112 indicating information on the cost of supplied energy when responding to DR. Further, the marginal cost calculation unit 142 calculates the actual value of the DR corresponding marginal cost based on the DR data 112.
With this configuration, the administrator who is in contact with the actual value of the calculated DR-compliant limit cost considers the DR incentive according to the operation status at that time, and among the control target devices 202, the target device or timing of the operation correction Can be easily determined. In addition, the administrator can determine whether to reduce or stop energy consumption according to DR.

The energy management apparatus 1 calculates a demand prediction value 144 of the energy of the control target device 202 based on the process data 111, and an operation plan that calculates a DR-compliant operation plan value based on the calculated demand prediction value. Part 145.
With this configuration, the administrator who is in contact with the DR-compliant operation plan value based on the energy demand prediction value can perform operation correction in consideration of a change trend of the future DR-compliant operation plan value.

The marginal cost calculation unit 142 calculates a predicted value of the marginal cost based on the operation plan value calculated by the operation plan unit 145 and the energy unit price indicated by the DR data 112.
With this configuration, the administrator who is in contact with the predicted value of the marginal cost can perform operation correction in consideration of the future trend of the marginal cost.

In the above-described embodiment, each data storage area stored in the process data storage unit 11, the setting input data storage unit 13, and the calculation result storage unit 15 functions as a storage unit for each data. These storage units are typically configured to include various storage media built in or externally connected to the energy management apparatus 1. Any of these storage media can be used now or in the future. Registers and the like used for various operations in the energy management apparatus 1 also constitute a part of the storage unit. The storage mode is not limited to a mode in which data stored for a longer time than a predetermined time is retained, and includes a mode in which data is temporarily stored for various processes and then deleted or updated.
Further, the specific contents and numerical values of the information exemplified in the above-described embodiment are arbitrary, and are not limited to specific contents and numerical values. In addition, in the determination of the magnitude of the threshold and the determination of coincidence / disagreement, the determination including the threshold is performed as described above, or larger, smaller, exceeding, not exceeding, exceeding, falling, less, etc. It is free to make a determination including a threshold value. For example, depending on the threshold setting, “greater than” can be read as “greater than”, “greater than” or “greater than”, and “less than” can be read as “less than”, “less than” or “less than”. It is.

About each said embodiment, the storage area of each data memorize | stored in a process data memory | storage part and an optimization data memory | storage part can each be comprised as a memory | storage part of each data. Typically, these storage units can be configured by various built-in or externally connected memories, hard disks, and the like. However, any storage medium that can be used now or in the future can be used as the storage unit. A register or the like used for calculation can also be regarded as a storage unit. The storage mode includes not only a mode in which memory is stored for a long time but also a mode in which data is temporarily stored for processing and deleted or updated in a short time.
In addition, the specific contents and values of the information used in each of the above embodiments are arbitrary, and are not limited to specific contents and numerical values. In the embodiment, in the determination of the magnitude with respect to the threshold value, the determination of coincidence / mismatch, etc., it is determined that the value is included as the above, below, or the value is greater than, less than, over, not over, over, under, less than It is also free to decide not to include. Thus, for example, depending on the value setting, “greater than” becomes “greater than”, “greater than”, “greater than”, and “less than” becomes “less than”, “not over”, “less than”, “less than” Even if it reads, it is substantially the same.

In each of the above embodiments, the input control unit 121, the arithmetic processing unit 14, and the display control unit 16 are software function units, but may be a hardware function unit such as an LSI.
Moreover, although the energy management apparatus 1 shall be provided with the input part 12 and the display part 17, either one or both of the input part 12 and the display part 17 may be abbreviate | omitted.

  According to at least one embodiment described above, the process data acquisition unit 101 that sequentially acquires the process data 111 having information related to the energy supply of the control target device 202, and the energy at a predetermined time interval based on the process data. By having the marginal cost calculation unit 142 that calculates the marginal cost of the supply device, it is possible to easily confirm the device or timing at which the manager corrects the operation.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the equivalents thereof.

  DESCRIPTION OF SYMBOLS 1 ... Energy management apparatus, 10 ... Communication part, 101 ... Process data acquisition part, 11 ... Process data storage part, 12 ... Input part, 121 ... Input control part, 13 ... Setting input data storage part, 14 ... Arithmetic processing part, DESCRIPTION OF SYMBOLS 141 ... COP calculating part, 142 ... Limit cost calculating part, 143 ... Priority order calculating part, 144 ... Demand prediction part, 145 ... Operation planning part, 146 ... Equipment control setting output part, 15 ... Calculation result memory | storage part, 16 ... Display Control unit, 17 ... display unit, 2 ... energy supply plant, 201 ... local control device, 202 ... controlled device, 211 ... power receiving equipment, 212 ... PV, 213 ... storage battery, 221 ... water-cooled chiller, 222 ... air-cooled HP chiller, 223 ... Heat recovery HP chiller, 224 ... ABR, 231 ... CGS, 232 ... Boiler, 233 ... Hot water tank, 3 ... Consumer, 31 ... Electric power load, 32 ... Cold heat Load, 33 ... heat load, 34 ... steam load, 4 ... internal network, 5 ... monitor control server, 6 ... external communication server, 7 ... external network, 8 ... DR server

Claims (14)

A data acquisition unit that sequentially acquires process data having operation information that is information related to the operation of at least one energy supply device to be controlled;
A marginal cost calculation unit that calculates a marginal cost indicating an energy unit price of energy consumption with respect to energy conversion efficiency of the energy supply device based on the process data;
An energy management device comprising: The data acquisition unit acquires demand response data indicating information on the cost of supply energy when responding to a demand response,
The energy management device according to claim 1, wherein the marginal cost calculation unit calculates an actual value of marginal cost when responding to a demand response based on the demand response data. The process data has information on energy demand as the operation information,
A demand prediction unit that calculates a demand prediction value of energy of the energy supply device based on the process data;
The energy management device according to claim 2, wherein an operation plan value that is a target value related to energy supplied by the energy supply device when responding to a demand response is calculated based on the demand predicted value.   The energy management device according to claim 3, wherein the marginal cost calculation unit calculates a predicted value of marginal cost based on the operation plan value and an energy unit price indicated by the demand response data. The process data has information on energy demand as the operation information,
A demand prediction unit that calculates a demand prediction value of energy of the energy supply device based on the process data;
The energy management device according to claim 1, further comprising: an operation plan unit that calculates an operation plan value that is a target value related to energy supplied by the energy supply device based on the demand prediction value.   The energy management device according to claim 5, wherein the marginal cost calculation unit calculates a predicted value of the marginal cost of the energy supply device based on the operation plan value. The apparatus further comprises a priority calculation unit that determines a higher priority as an energy supply apparatus having a smaller actual value of the marginal cost as an operation priority among a plurality of energy supply apparatuses having a common supply energy type. 6. The energy management apparatus according to any one of 6.   The energy management device according to claim 7, wherein the priority calculation unit determines whether or not there is an update merit of the priority based on a limit cost and an operation state of each of the plurality of energy supply devices.   The energy management apparatus according to claim 7 or 8, wherein the priority order calculation unit changes the priority order among a plurality of energy supply apparatuses specified by operation input. The energy management device according to any one of claims 1 to 9, further comprising: a display control unit that displays an actual value of the marginal cost. The energy management apparatus according to any one of claims 7 to 9, further comprising a display control unit configured to display the priority order.   The energy management device according to claim 11, wherein when the priority calculation unit determines that there is an update merit of the priority, the display control unit displays the priority change request screen. In a method in an energy management device,
A data acquisition process for sequentially acquiring process data having operation information that is information related to operation of at least one energy supply device to be controlled;
A marginal cost calculation step of calculating a marginal cost indicating an energy unit price of energy consumption with respect to energy conversion efficiency of the energy supply device based on the process data;
Energy management method. In the computer of the energy management device,
A data acquisition unit that sequentially acquires process data having operation information that is information related to the operation of at least one energy supply device to be controlled;
A marginal cost calculation unit that calculates a marginal cost indicating an energy unit price of energy consumption with respect to energy conversion efficiency of the energy supply device based on the process data;
A program for running

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