JP6142959B1 - Plant operation support device, display device, plant operation system, and plant operation support method - Google Patents

Abstract

In a process of changing a plant operation from a current operation to a target operation, the plant operator can grasp how much waste is present in the total energy consumption of the entire plant. A process of changing the operation of a plant 2 from a current point specified by a total energy consumption current value with respect to a total load current value to a target point specified by a total energy consumption target value with respect to a total load predicted value is represented. The total consumption energy range for calculating the total consumption energy range formula representing the range that the total consumption energy for the total load of the entire plant 2 can be calculated using the recommended trace calculation unit 323 that calculates the recommended trace and the system model formula and the equipment model formula The plant operation support apparatus 3 includes a calculation unit 324 and an output unit 34 that generates and outputs total energy consumption range display data in which a recommended trajectory is displayed on the screen together with an executable region represented by a total energy consumption range formula. Constitute. [Selection] Figure 1

Description

  The present invention relates to a plant operation support device, a display device, a plant operation system, and a plant operation support method.

  A plant that supplies energy to a consumer includes a plurality of facilities that generate energy according to a load required by the consumer and supply the generated energy to the consumer. A plurality of such facilities receive a supply of resources such as electric power or gas, and generate energy such as electric power or heat. Further, when the operation of such a plant is controlled, the load distribution for each facility is determined so that the operation cost such as the power consumption of the entire plant is reduced. For example, in Patent Document 1, a start / stop plan for operation / stop of an energy generation facility and an output distribution plan for an energy generation facility in operation are created as an operation plan. In addition, an operable range that can be realized by the start / stop plan, that is, an upper limit value and a lower limit value of an energy supply range that can be realized without additional facility activation and facility shutdown are calculated.

  On the other hand, a technique for optimizing a system by expressing a problem such as system control by a first-order predicate logical expression and solving it is known (for example, see Non-Patent Document 1). Specifically, for a logical expression in which polynomial equations and inequalities are combined with a combination symbol such as logical product (∧) or logical sum (∨), a generic symbol (∀) or presence that is collectively called a quantifier A first-order predicate logical expression is generated by adding symbols (∃) to some variables. Then, the variable (bound variable) with the quantifier in the first-order predicate logical expression is deleted, and the logical expression to be satisfied by other variables (free variables) is derived to optimize the system.

Patent Document 2, the control system is converted into first-order logic formulas, the control system analysis and design apparatus for analyzing the control system from erasing the equation variables with a limited symbols in the first-order logic formulas is disclosed ing.

  Non-Patent Document 2 discloses a technique for visualizing a range of energy costs with respect to the total demand by formulating a system with a first-order predicate logical expression and applying a limit symbol elimination algorithm. Yes.

JP 2006-72536 A JP 11-328239 A

Hirokazu Anai and Kazuhiro Yokoyama, “QE Calculation Algorithms and Their Applications Optimization by Formula Processing”, The University of Tokyo Press, August 2011, p.214-221 Yoshio Tange, Satoshi Kiryu, Tetsuro Matsui, Yoshikazu Fukuyama, “Visualization of energy optimization problem considering supply and demand balance for energy conservation prior study”, IEEJ Transactions C, Vol.134, No.1, pp.78- 84 (2014)

  However, for example, even if the technique of Patent Document 1 is used, how much waste exists in the total energy consumption of the entire plant in the process of changing the operation of the plant from the current operation to the optimal operation. Cannot grasp. In addition, for example, even if the total energy consumption for the total load of the entire system is visualized using Non-Patent Document 2, in the process of changing the operation of the plant from the current value to the target optimum value, The system operator cannot grasp whether there is any waste.

  An object according to one aspect of the present invention is that a plant operator can grasp how much waste is present in the total energy consumption of the entire plant in the process of changing the operation of the plant from the current operation to the target operation. Is to do so.

A plant operation support apparatus according to an embodiment includes a recommended trajectory calculation unit, a total energy consumption range calculation unit, and an output unit.
The recommended trajectory calculation unit is in the process of changing the operation of the plant from the current point specified by the total energy consumption current value for the total load current value to the target point specified by the total energy consumption target value for the total load predicted value. Calculate the recommended trajectory to be routed.

  The total consumption energy range calculation unit calculates a total consumption energy range formula that represents a range that the total consumption energy can take with respect to the total load in the entire plant, using the system model formula and the equipment model formula.

  The output unit creates and outputs total energy consumption range display data in which a recommended trajectory is displayed on the screen together with the executable region represented by the total energy consumption range formula.

  According to the plant operation support apparatus according to one embodiment, in the process of changing the operation of the plant from the current operation to the target operation, the plant operation determines how much waste is present in the total energy consumption of the entire plant. Can grasp.

It is a figure which shows the structural example of the plant operation system containing the plant operation assistance apparatus according to embodiment. It is a figure which shows an example of the processing flow which the plant analysis part according to embodiment performs. It is a figure explaining an example of a process of the total load prediction part according to embodiment. It is a figure explaining an example of the process of the optimal distribution calculation part according to embodiment. It is a figure explaining an example of a process of the recommendation locus calculation part according to an embodiment. It is a figure explaining an example of a process of the total consumption energy range calculation part according to embodiment. It is an example of the total energy consumption range display screen according to the embodiment. It is a figure which shows an example of system model information. It is a figure which shows an example of equipment model information. It is a figure which shows an example of total energy consumption present value information. It is a figure which shows an example of total load present value information and a total load prediction value. It is a figure which shows an example of recommended locus | trajectory data. It is a figure which shows the 1st example of a total consumption energy range display screen. It is a figure which shows the 2nd example of a total consumption energy range display screen. It is a figure which shows the 3rd example of a total consumption energy range display screen. It is a figure which shows the 4th example of a total consumption energy range display screen. It is a figure which shows an example of a surplus consumption energy display screen. It is a figure which shows an example of a load distribution display screen. It is a figure which shows the structural example of the information processing apparatus contained in the plant operation system according to embodiment.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the invention will be described in detail with reference to the drawings.
FIG. 1 is a diagram illustrating a configuration example of a plant operation system including a plant operation support apparatus according to the embodiment. In the configuration example shown in FIG. 1, the plant operation system 1 includes a plant 2, a plant operation support device 3, and a terminal device 4. The plant 2, the plant operation support device 3, and the terminal device 4 are connected to each other via wired communication or wireless communication.

  The plant 2 includes a resource 21, a plurality of facilities 22-1 to 22-4, and a customer 23. The resource 21 is, for example, electric power or gas, and is supplied to the plurality of facilities 22-1 to 22-4. The plurality of facilities 22 are, for example, a generator, a boiler, a refrigerator, and the like, generate energy from the resource 21 according to the load required by the consumer 23, and supply the generated energy to the consumer 23. In FIG. 1, four facilities 22-1 to 22-4 are shown, but the number of facilities included in the plant 2 may be an arbitrary number of 2 or more. Moreover, in the following description, when there is no particular distinction between the plurality of facilities 22-1 to 22-4, the facility 22 may be described. The consumer 23 is, for example, a power consuming facility or an air conditioning target space.

  The plant operation support apparatus 3 is an example of a plant operation support apparatus according to the embodiment, and is an apparatus that supports load distribution of each facility 22 in the plant 2 including a plurality of facilities 22. The plant operation support apparatus 3 includes an input data holding unit 31, a plant analysis unit 32, a generated data holding unit 33, and an output unit 34.

  The input data holding unit 31 is, for example, a RAM (Random Access Memory) or a ROM (Read Only Memory). The data held by the input data holding unit 31 includes prediction condition data for the plant 2, the current total load value and the current total energy consumption value, and a system model formula and an equipment model formula as model information related to the plant 2. .

  The prediction condition data is data used when predicting the future total load of the entire plant 2, for example, data such as a plan value and time when the plant 2 is operated. The total load current value is the total load of the entire plant 2 at the current time. The total current consumption current value is the total energy consumption of the entire plant 2 at the current time. The system model formula represents the relationship between each facility 22 in the plant 2 and the total load of the entire plant 2, and the relationship between the energy consumption of each facility 22 in the plant 2 and the total energy consumption of the entire plant 2. It is a mathematical formula. The equipment model formula is a formula expressing the relationship between the load of each equipment 22 in the plant 2 and the energy consumption.

  As illustrated in FIG. 1, each piece of information serving as a basis for the prediction condition data, the total load current value, and the total energy current value may be acquired from the plant 2. Further, the system model information that is the basis of the system model formula and the equipment model information that is the basis of the equipment model formula may be acquired from the terminal device 4. The operation of the plant operation support apparatus 3 may be started from acquisition of various data held by the input data holding unit 31 or may be started using various data already held in the input data holding unit 31. May be.

  The plant analysis unit 32 is, for example, a CPU (Central Processing Unit), a multi-core CPU, or a programmable device (FPGA (Field Programmable Gate Array), PLD (Programmable Logic Device, etc.)). The plant analysis unit 32 analyzes the operation state of the plant 2 at the current time and the predicted time. The plant analysis unit 32 includes a total load prediction unit 321, an optimum distribution calculation unit 322, a recommended locus calculation unit 323, and a total consumption energy range calculation unit 324.

  The total load prediction unit 321 predicts the total load of the entire plant 2 at a predetermined prediction time. The optimum distribution calculation unit 322 calculates the optimum distribution load of each facility 22 and the total energy consumption minimum value of the entire plant 2. The optimum distribution load of each facility 22 refers to the load of each facility 22 that is optimally distributed so that the total energy consumption is minimized with respect to the total load of the entire plant 2. Moreover, the total total energy consumption minimum value of the whole plant 2 refers to the total energy consumption when the load of each equipment 22 is optimally distributed. The recommended trajectory calculation unit 323 calculates a recommended trajectory through which the operation of the plant 2 related to the total energy consumption with respect to the total load in the entire plant 2 is changed from the current point to the target point. The total consumed energy range calculation unit 324 calculates a range that the total consumed energy can take with respect to the total load in the entire plant 2.

  The total load prediction unit 321, the optimum distribution calculation unit 322, the recommended trajectory calculation unit 323, and the total consumption energy range calculation unit 324 operate according to the processing flow illustrated in FIG. 2, for example. FIG. 2 is a diagram illustrating an example of a processing flow executed by the plant analysis unit according to the embodiment.

  In step S <b> 1, the plant analysis unit 32 acquires various data used for processing from the plant 2 and the terminal device 4. Alternatively, the plant analysis unit 32 acquires various data used for processing from the input data holding unit 31. Specifically, for example, the total load predicting unit 321 acquires prediction condition data. The recommended trajectory calculation unit 323 acquires the current total load value and the current total energy consumption value. The total energy consumption range calculation unit 324 acquires the system model formula and the equipment model formula.

FIG. 3 is a diagram illustrating an example of processing of the total load prediction unit according to the embodiment. In step S2, the total load prediction unit 321 predicts the total load of the entire plant 2 at a predetermined prediction time using the acquired prediction condition data, as shown in FIG. For the prediction by the total load prediction unit 321, a predetermined plan value may be used, or a prediction model such as a regression equation may be used. FIG. 3B shows the total load prediction at 13:00, one hour after the current time, when the plant 2 is in operation at the current time 12:00 with the current total load value ₁₀ being 300 [kW]. An example is shown in which the value l ₁ is predicted to decrease to 200 [kW]. The total load prediction unit 321 outputs the predicted total load prediction value to the optimum distribution calculation unit 322, the recommended trajectory calculation unit 323, and the generated data holding unit 33.

  FIG. 4 is a diagram illustrating an example of processing of the optimum distribution calculation unit according to the embodiment. In step S3, the optimum distribution calculation unit 322 acquires the total load prediction value predicted by the total load prediction unit 321 as illustrated in FIG. And the optimal distribution calculation part 322 calculates the optimal distribution load of each installation 22, and the total total energy consumption minimum value of the whole plant 2 with respect to the acquired total load estimated value. The optimal distribution calculation unit 322 outputs the calculated optimal distribution load of each facility 22 to the generation data holding unit 33. Further, the optimum distribution calculation unit 322 outputs the calculated total energy consumption minimum value to the recommended trajectory calculation unit 323 and the generated data holding unit 33.

  FIG. 5 is a diagram illustrating an example of processing of the recommended trajectory calculation unit according to the embodiment. In step S4, the recommended trajectory calculation unit 323 obtains the total load current value and the total energy consumption current value as shown in FIG. In addition, the recommended trajectory calculation unit 323 acquires the total load predicted value predicted by the total load prediction unit 321 and the total total energy consumption minimum value calculated by the optimum distribution calculation unit 322. Then, the recommended trajectory calculation unit 323 calculates a recommended trajectory that is routed in the process of changing the operation of the plant 2 from the current point to the target point. The current point indicates a point specified by the total current consumption value with respect to the total load current value when the total consumption energy with respect to the total load is graphed. Moreover, a target point refers to the point specified by the total energy consumption target value with respect to a total load prediction value. The total energy consumption target value is the minimum total energy consumption value in the present embodiment, but may be arbitrarily set by an operator (user) of the plant 2. Further, the target point may be determined by the recommended trajectory calculation unit 323 or may be determined (set) by the operator. The recommended trajectory calculation unit 323 calculates the recommended trajectory in time series from the current time corresponding to the current point to a predetermined predicted time corresponding to the target point.

  The recommended trajectory is that the load of each facility 22 included in the plant 2 is temporally changed in the process in which the total load in the entire plant 2 is changed from the total load current value corresponding to the current point to the total load predicted value corresponding to the target point. It may be a trajectory when it is changed at a constant rate. Since it is relatively easy for the operator of the plant 2 to control the plant 2 so that the load of each facility 22 is changed at a constant rate, the operator operates each facility 22 according to the recommended trajectory, The operation of the plant 2 can be easily changed to the target point.

  The recommended trajectory is that the total energy consumption of the entire plant 2 is minimized in the process in which the total load of the entire plant 2 is changed from the total load current value corresponding to the current point to the predicted total load value corresponding to the target point. Thus, the trajectory when the load of each facility 22 is optimally distributed may be used. If the operation of the plant 2 is changed according to such a recommended trajectory, it is possible to reduce wasteful energy consumption that occurs when the operation of the plant 2 is changed from the current point to the target point.

  The specific conditions of the recommended trajectory including the specific examples of the recommended trajectory as described above may be arbitrarily set according to the purpose of the operator of the plant 2 (for example, ease of operation change or reduction of power consumption). The recommended trajectory calculation unit 323 calculates a recommended trajectory according to preset conditions. It can be said that the recommended trajectory is a set of intermediate points that pass through from the current point to the target point in operating the plant. The user can obtain a guide how to operate the plant through the operating point.

The recommended trajectory calculation unit 323 outputs the calculated recommended trajectory data to the generation data holding unit 33 and the output unit 34.
FIG. 6 is a diagram illustrating an example of processing of the total energy consumption range calculation unit according to the embodiment. In step S5, the total consumption energy range calculation unit 324 creates a first-order predicate logical expression from the acquired system model formula F1 and equipment model formula F2, as shown in FIG.

  In the example shown in FIG. 6, the system model formula F1 is a formula represented by the following formula (1). In equation (1), the sum of the energy consumption P1, P2,... Of each facility 22 corresponds to the total energy consumption P of the entire plant 2, and the sum of the loads L1, L2,. Corresponding to the total load L of the entire plant 2 is shown.

In the example shown in FIG. 6, the equipment model formula F2 is a formula represented by the following formula (2). In formula (2), the energy consumption P1, P2,... Of each facility 22 corresponds to the product of the efficiency a1, a2,... Of the facility and the loads L1, L2,. Has been shown to do.

The total consumption energy range calculation unit 324 creates a mathematical formula in which the system model mathematical formula F1 and the equipment model mathematical formula F2 are combined by a logical product. Then, the total energy consumption range calculation unit 324 adds the existence code に to the variables except for the variable L that represents the total load of the entire plant 2 and the variable P that represents the total energy consumption of the entire plant 2 for the created mathematical formula. To generate the first order predicate logical expression Ψ. In the example shown in FIG. 6, the first order predicate logical expression Ψ is expressed as the following expression (3).

The total consumption energy range calculation unit 324 generates a total consumption energy range formula φ by applying an arbitrary limited erasure algorithm to the generated first-order predicate logical expression Ψ. The total energy consumption range formula φ is a formula representing the range that the total energy consumption can take with respect to the total load by changing the load distribution of each facility 22. In the example shown in FIG. 6, the total energy consumption range expression φ is expressed as the following expression (4).

Equation (4) shows that the total energy consumption P of the entire plant is larger than the product of the total load L and the lower limit variable b1, and lower than the product of the total load L and the upper limit variable b2. Yes. The total consumption energy range calculation unit 324 outputs the generated total consumption energy range formula φ to the generation data holding unit 33 and the output unit 34.

The generated data holding unit 33 is, for example, a RAM or a ROM. The generation data holding unit 33 holds the analysis result obtained by the plant analysis unit 32 . For example, the generated data holding unit 33 holds a total load predicted value, optimum distribution data (optimum distribution load and total energy consumption minimum value), recommended trajectory data, and total energy consumption range formula.

  The output unit 34 is, for example, a CPU, a multi-core CPU, a programmable device (FPGA, PLD, or the like), and may further include a communication interface. The output unit 34 creates data for displaying the analysis result of the plant 2 on the screen, and outputs the created data to the terminal device 4.

  Specifically, for example, the output unit 34 creates data for displaying the executable area on the screen using the total energy consumption range formula. The feasible area is an area expressed when the total energy consumption with respect to the total load is graphed, and the total energy consumption with respect to the total load in the entire plant 2 is changed by changing the load distribution of each facility 22. It refers to the possible area. In addition, the output unit 34 creates total energy consumption range display data in which a recommended trajectory is displayed on the screen together with the executable region. The output unit 34 outputs the created total energy consumption range display data to the terminal device 4.

  The terminal device 4 is an example of a display device according to the embodiment. The terminal device 4 is, for example, a computer, a tablet, a smartphone, or the like. The terminal device 4 includes an input unit 41, a processing unit 42, a display unit 43, and a communication unit 44. The input unit 41 is, for example, a keyboard, a mouse, and / or a touch panel. The processing unit 42 is, for example, a processor such as a CPU (Central Processing Unit). The display unit 43 is, for example, a liquid crystal display. The communication unit 44 is, for example, a wired and / or wireless communication interface device.

  For example, the operator inputs conditions regarding operation support of the plant 2 through the input unit 41. The condition regarding the operation support of the plant 2 is, for example, the recommended locus condition as described above. Further, depending on the embodiment, the conditions related to the operation support of the plant 2 may include a target point set by the operator. The communication unit 44 transmits conditions related to operation support of the plant 2 to the plant operation support apparatus 3. Further, the communication unit 44 receives from the plant operation support apparatus 3 total energy consumption range display data in which a recommended trajectory calculated according to the transmitted condition is displayed on the screen together with the executable region represented by the total energy consumption range formula. To do. The processing unit 42 processes the total energy consumption range display data, and the display unit 43 displays a total energy consumption range display screen including an executable region display and a recommended locus according to the processing result of the total energy consumption range display data.

  FIG. 7 is a diagram illustrating an example of a total energy consumption range display screen according to the embodiment. As shown in FIG. 7, the executable region is displayed on a graph in which the horizontal axis is the total load L and the vertical axis is the total energy consumption P. In the feasible area, the current point specified by the total energy consumption with respect to the current total load and the target point specified by the minimum total energy consumption with respect to the total load predicted value at a predetermined prediction time are displayed. The Further, a recommended trajectory that is routed in the process of changing the operation of the plant 2 from the current point to the target point is displayed.

  The operator of the plant 2 can change the operation of the plant 2 from the current point to the target point according to the recommended trajectory by referring to the total energy consumption range display screen displayed on the display unit 43. Further, the difference between the recommended trajectory regarding the total energy consumption and the lower limit point of the feasible region corresponds to the surplus total energy consumed when the operation of the plant 2 is changed according to the recommended trajectory. Therefore, the operator can grasp how much waste is generated in the total energy consumption of the entire plant 2 in the process of changing the operation of the plant 2 according to the recommended trajectory by referring to the total energy consumption range display screen. it can.

  Thus, according to the plant operation support apparatus according to the embodiment, how much waste exists in the total energy consumption of the entire plant in the process of changing the operation of the plant from the current operation to the target operation. The plant operator can grasp this.

  Hereinafter, how the plant operation support apparatus 3 according to the embodiment calculates various mathematical formulas using the input information such as various models and obtains display data of the calculation results will be further described using specific examples. explain.

  FIG. 8 is a diagram illustrating an example of system model information. In the example illustrated in FIG. 8, the air conditioning system information is shown as the system model information of the plant 2. In the air conditioning system 2 shown in the figure, the resource 21 is electric power, the plurality of facilities 22 are refrigerators, and the customer 23 is an air conditioning target space. And electric power is handled as energy consumption, and thermal load is handled as load.

  More specifically, the air conditioning system 2 includes four refrigerators 22-1 to 22-4. The refrigerator 22-1 consumes electric power P1 [kW] for the load L1 [kW], and the refrigerator 22-2 consumes electric power P2 [kW] for the load L2 [kW]. The refrigerator 22-3 consumes electric power P3 [kW] with respect to the load L3 [kW], and the refrigerator 22-4 consumes electric power P4 [kW] with respect to the load L4 [kW]. The sum of the power consumption P1, P2, P3, and P4 consumed by each of the refrigerators 22-1 to 22-4 is the total power consumption P [kW] consumed by the entire air conditioning system 2. The total load L [kW] required by the air-conditioning target space 23 is distributed to the loads L1, L2, L3, and L4 of the refrigerators 22-1 to 22-4. Therefore, the system model formula F1 for the air conditioning system 2 shown in FIG. 8 is a formula shown in the following formula (5).

As shown in the equation (5), the system model equation F1 includes the total sum of the electric power P1, P2, P3, and P4 consumed by each refrigerator 22-1 to 22-4 in the entire air conditioning system 2. It is expressed that the power consumption becomes P [kW]. The system model formula F1 expresses that the total load L [kW] required by the air-conditioning target space 23 is distributed to the loads L1, L2, L3, and L4 of the refrigerators 22-1 to 22-4. Is done. The system model formula F1 is a logical product of these expressions.

  The system model formula F1 may be input through the input unit 41 and acquired and held by the input data holding unit 31, for example. Alternatively, the system model information that is the basis of the system model formula F <b> 1 may be input through the input unit 41 and acquired and held by the input data holding unit 31.

  FIG. 9 is a diagram illustrating an example of the equipment model information. FIG. 9 shows power consumption characteristics for the loads of the refrigerators 22-1 to 22-4 as an example of the equipment model information. As shown in FIG. 9, each refrigerator 22-1 to 22-4 has different power consumption characteristics and upper and lower limit constraints. Therefore, the equipment model formula F2 created from the equipment model information shown in FIG. 9 is a formula shown in the following formula (6).

As shown in the equation (6), the power consumption characteristics of the refrigerators 22-1 to 22-4 are expressed by mathematical formulas in the equipment model mathematical formula F2. The equipment model formula F2 is a logical product of these power consumption characteristics.

  The equipment model formula F2 may be input through the input unit 41 and acquired and held by the input data holding unit 31, for example. Alternatively, the equipment model information that is the basis of the equipment model formula F2 may be input through the input unit 41 and acquired and held by the input data holding unit 31.

FIG. 10 is a diagram illustrating an example of the total energy consumption current value information. FIG. 10 shows a change in the total power consumption with time as an example of the total energy consumption current value information. In the example shown in FIG. 10, 200 kW of power is consumed by the entire air conditioning system 2 at 17:00, which is the current time. The current value of the total energy consumption (total power consumption) of the entire air conditioning system 2 is measured in the air conditioning system 2 at predetermined time intervals (one hour interval in the example shown in FIG. 10) and acquired by the input data holding unit 31. And may be retained.

FIG. 11 is a diagram illustrating an example of the total load current value information and the total load predicted value. FIG. 11 shows a temporal change in the total heat load of the entire air conditioning system 2 as an example of the total load current value information. In the example shown in FIG. 11, the total heat load required by the air-conditioning target space 23 at 17:00, which is the current time, is 500 [kW]. The current value of the total load (total heat load) may be measured in the air conditioning system 2 at a predetermined time interval (one hour interval in the example illustrated in FIG. 11), and may be acquired and held by the input data holding unit 31. .

  In addition to the mathematical expressions and data described above, the input data holding unit 31 acquires and holds prediction condition data from the air conditioning system 2. The prediction condition data is, for example, data such as a planned value when the air conditioning system 2 is operated and a predetermined predicted time of operation.

The plant analysis unit 32 executes, for example, the following processing using various data as described above with reference to FIGS.
The total load prediction unit 321 acquires prediction condition data from the input data holding unit 31. The total load prediction unit 321 predicts the total heat load required by the air-conditioning target space 23 at a predetermined prediction time, using the acquired prediction condition data. In the example illustrated in FIG. 11, the total load prediction unit 321 predicts that the total heat load required by the air-conditioning target space 23 is 400 [kW] at 18:00, which is a predetermined prediction time. The total heat load predicted value predicted by the total load prediction unit 321 is held by the generation data holding unit 33.

The optimum distribution calculation unit 322 acquires the system model formula F1 and the equipment model formula F2 from the input data holding unit 31. The optimum distribution calculation unit 322 obtains the total thermal load prediction value total load prediction unit 321 predicts. The optimum distribution calculation unit 322 minimizes the total power consumption of the entire air conditioning system 2 under the constraint that the total heat load of the entire air conditioning system 2 is the predicted total heat load predicted by the total load prediction unit 321. Solve the optimization problem. For example, when the total heat load prediction value L is 400 [kW], the optimal distribution calculation unit 322 performs the objective function expressed by the following equation (7) under the constraint condition expressed by the following equation (8). Solve.

For example, when the total heat load prediction value L is 400 [kW], the load distribution that minimizes the total power consumption P is calculated by the optimum distribution calculation unit 322 as follows. That is, the load L1 of the refrigerator 22-1 is 108 [kW], the load L2 of the refrigerator 22-2 is 95 [kW], and the load L3 of the refrigerator 22-3 is 122 [kW]. The load L4 of the refrigerator 22-4 is calculated to be 75 [kW]. Further, when the thermal load is distributed so that the total power consumption P is minimized when the total heat load prediction value L is 400 [kW], the total power consumption minimum value is 172.39 [kW]. Calculated.

  Note that the optimal distribution calculation unit 322 may solve the objective function expressed by the equation (7) under the time constraint expressed by the following equation (9) in addition to the constraint expressed by the equation (8). Good.

In the equation (9), the load Li ^* (in this embodiment, an integer of i = 1 to 4) is a load before a predetermined step time (for example, 10 minutes) before the load Li at a certain time, and ΔLi is The load change allowable value that allows the facility 22-i to change the load within a predetermined time interval. The load change allowable value ΔLi of each facility 22 may be acquired and held by the input data holding unit 31 as one piece of facility model information. The optimal distribution calculation unit 322 has a restriction that each refrigerator 22 has a temporal load change allowable value when the total heat load of the entire air conditioning system 2 is changed from the total heat load current value to the total heat load predicted value. Under the conditions, the optimization problem of minimizing the total power consumption of the entire air conditioning system 2 is solved. By adding a time constraint condition as shown in the equation (9), it is possible to calculate an optimum load distribution in consideration of the time output constraint of each facility 22.

  The optimum distribution heat load of each of the refrigerators 22-1 to 2-4 calculated by the optimum distribution calculation unit 322 and the total power consumption minimum value of the entire air conditioning system 2 are held by the generation data holding unit 33 in association with the predicted time. .

  The total consumption energy range calculation unit 324 acquires the system model formula F1 and the equipment model formula F2 from the input data holding unit 31. Then, the total energy consumption range calculation unit 324 assigns an existence symbol 除 く to the variable excluding the total power consumption P and the total heat load L with respect to a formula obtained by combining the system model formula F1 and the equipment model formula F2 with a logical product. Then, the first order predicate logical expression Ψ as shown in the following expression (10) is generated.

The total consumption energy range calculation unit 324 applies the quantifier elimination algorithm QE to the generated first-order predicate logical expression Ψ, and generates a total consumption energy range expression φ as represented by the following expression (11). .

The total energy consumption range represented by equation (11) is a range of values that can be taken by the total power consumption, which can be realized by changing the thermal load distribution of each refrigerator 22 with respect to an arbitrary total heat load value. Represents. The total consumption energy range mathematical formula φ calculated by the total consumption energy range calculation unit 324 is held by the generated data holding unit 33.

  The recommended trajectory calculation unit 323 acquires the current value of the total heat load and the current value of the total power consumption from the input data holding unit 31 at the current time, and determines the current point specified by the current value of the total power consumption with respect to the current value of the total heat load. decide. Further, the recommended trajectory calculation unit 323 acquires the total heat load predicted value and the total power consumption minimum value at a predetermined prediction time from the input data holding unit 31, and is specified by the total power consumption minimum value with respect to the total heat load prediction value. Determine the target point. The recommended trajectory calculation unit 323 calculates a recommended trajectory that is routed in the process of changing the operation of the air conditioning system 2 from the current point to the target point.

  For example, in the process in which the total heat load of the entire air conditioning system 2 is changed from the current value of the total heat load to the predicted value of the total heat load, the recommended trajectory calculation unit 323 has the heat load of each refrigerator 22 at a constant rate in time. You may calculate the recommended locus | trajectory in the case of changing.

  Specifically, the recommended trajectory calculation unit 323 acquires the heat load of each refrigerator 22 at the current time (for example, 17:00). The heat load of each refrigerator 22 at the current time may be acquired and held in advance by the input data holding unit 31 from the air conditioning system 2. Further, the recommended trajectory calculation unit 323 acquires the optimum distributed heat load of each refrigerator 22 at the predicted time (for example, 18:00). The recommended trajectory calculation unit 323 calculates the heat load for each predetermined step time (for example, 10 minutes) when the heat load of the refrigerator 22 is linearly changed from the heat load at the current time to the optimum distributed heat load. Calculation is performed for the refrigerator 22. The recommended trajectory calculation unit 323 calculates the total heat load for each predetermined time interval by summing the calculated heat loads of each refrigerator 22 for each predetermined time interval. Further, the recommended trajectory calculation unit 323 acquires, for each refrigerator 22, the power consumption for each predetermined interval corresponding to the calculated heat load, using the equipment model information of each refrigerator 22. The recommended trajectory calculation unit 323 calculates the total power consumption for each predetermined time interval by summing the acquired power consumption of each refrigerator 22 for each predetermined time interval. Then, the recommended trajectory calculation unit 323 obtains a recommended trajectory having the total power consumption with respect to the total heat load at predetermined intervals as a trajectory point.

  In addition, the recommended trajectory calculation unit 323 minimizes the total power consumption of the entire air conditioning system 2 in the process of changing the total heat load of the entire air conditioning system 2 from the current total heat load to the predicted total heat load. You may calculate the recommendation locus | trajectory in case the heat load of each refrigerator 22 is optimally distributed.

  Specifically, the recommended trajectory calculation unit 323 acquires the total heat load of the entire air conditioning system 2 at the current time. In addition, the recommended trajectory calculation unit 323 acquires the total heat load prediction value of the entire air conditioning system 2 at the prediction time. The recommended trajectory calculation unit 323 divides the total thermal load value from the total thermal load at the current time to the predicted total thermal load at the predicted time at a predetermined interval, thereby calculating the total thermal load for each predetermined interval. . The recommended trajectory calculation unit 323 outputs the total heat load for each predetermined step time to the optimum distribution calculation unit 322. The optimum distribution calculation unit 322 calculates the optimum distribution heat load and the total total power consumption minimum value of each refrigerator 22 with respect to the total heat load for each predetermined time interval. The recommended trajectory calculation unit 323 acquires the minimum total power consumption value for each predetermined step time from the optimum distribution calculation unit 322. And the recommended locus | trajectory calculation part 323 calculates | requires the recommended locus | trajectory which makes the locus point the total power consumption minimum value with respect to the total heat load for every predetermined step time.

  In addition, when the optimal distribution load of each refrigerator 22 in the total heat load prediction value is calculated using the time constraint condition as shown in the equation (9), the optimal distribution calculation unit 322 is in the process of the calculation. The optimum distribution load and the total heat load minimum value are calculated at predetermined intervals. Therefore, the recommended trajectory calculation unit 323 may acquire the optimal distribution load and the total total power consumption minimum value for each predetermined interval from the optimal distribution calculation unit 322. The recommended trajectory calculation unit 323 calculates the total heat load for each predetermined time interval by summing the acquired optimum distribution load for each predetermined time interval. And the recommended locus | trajectory calculation part 323 calculates | requires the recommended locus | trajectory which makes the locus point the total power consumption minimum value with respect to the total heat load for every predetermined step time.

  The data of the recommended trajectory calculated by the recommended trajectory calculating unit 323 is held by the generated data holding unit 33. FIG. 12 is a diagram illustrating an example of recommended trajectory data. Specifically, FIG. 12A shows that the heat load of each refrigerator 22 is temporally changed in the process in which the total heat load of the entire air conditioning system 2 is changed from the current total heat load to the predicted total heat load. It is an example of data of a recommended locus when it is changed at a fixed rate. FIG. 12B shows that each refrigeration is performed so that the total power consumption of the entire air conditioning system 2 is minimized in the process of changing the total heat load of the entire air conditioning system 2 from the current total heat load to the predicted total heat load. It is a data example of the recommended locus | trajectory in case the heat load of the machine 22 is optimally distributed. As shown in FIG. 12, the recommended trajectory data may include the total power consumption [kW] with respect to the total heat load [kW] for each predetermined interval in the process from the current time to the predicted time.

  The output unit 34 creates data for displaying an executable area on the screen using the total energy consumption range formula φ. And the output part 34 produces the total energy consumption range display data by which a recommendation locus | trajectory is displayed on a screen with an executable area | region. The output unit 34 outputs the created total energy consumption range display data to the terminal device 4. The terminal device 4 displays a total energy consumption range display screen on the display unit 43 based on the input total energy consumption range display data.

  FIG. 13 is a diagram illustrating a first example of a total energy consumption range display screen. As shown in FIG. 13, the total energy consumption range display screen displays the current point, the target point, and the recommended trajectory that is routed in the process of changing the operation from the current point to the target point, together with the executable region. The FIG. 13 shows a recommended locus based on the recommended locus data shown in FIG.

  The operator of the air conditioning system 2 can change the operation of the air conditioning system 2 from the current point to the target point according to the recommended trajectory by referring to the total energy consumption range display screen displayed on the display unit 43. In addition, the operator compares the recommended trajectory with the lower limit of the executable area to determine how much waste is generated in the total power consumption of the entire air conditioning system in the process of changing the operation of the air conditioning system 2 according to the recommended trajectory. I can grasp it.

  FIG. 14 is a diagram illustrating a second example of the total energy consumption range display screen. Also in FIG. 14, the current point, the target point, and the recommended locus are displayed together with the executable area on the total energy consumption range display screen. FIG. 14A shows a recommended locus based on the recommended locus data shown in FIG. FIG. 14B shows a recommended trajectory in the case where the above-described time constraint condition is added while calculating Expression (9) when calculating the optimum distribution load of each refrigerator 22.

  The operator of the air conditioning system 2 can change the operation of the air conditioning system 2 while suppressing wasteful power consumption as much as possible by changing the operation of the air conditioning system 2 from the current point to the target point according to the recommended trajectory. it can. Specifically, the operation is changed according to an ideal recommended locus as shown in FIG. 14A in which wasteful power consumption is reduced, so that air conditioning is performed in the process of changing the operation from the current point to the target point. Wasteful power consumption generated in the entire system 2 can be suppressed as much as possible. In addition, since the recommended trajectory as shown in FIG. 14B reflects a load that can be changed by each refrigerator 22 in terms of time, the operation is changed according to the recommended trajectory, so that Unnecessary power consumption generated in the entire air conditioning system 2 under the actual time constraint condition of the machine 22 can be suppressed.

  The conditions for obtaining the recommended trajectory represented in the total energy consumption range display screen including the examples shown in FIGS. 13 and 14 are the purpose of the operator of the plant 2 (for example, ease of operation change or consumption It may be arbitrarily set in accordance with power reduction or the like. For example, the user sets conditions for what kind of recommended locus is desired through the input unit 41, and the communication unit 44 transmits the preset conditions to the plant operation support device 3. Output data for displaying a recommended locus desired by the user can be created. When the user desires ease of operation change, the user selects a recommended locus when the load of each facility included in the plant is changed at a constant rate as shown in FIG. When the user wants to reduce power consumption, as shown in FIG. 14A, the user selects a recommended locus when the load of each facility is optimally distributed so that the total energy consumption of the entire plant is minimized. . When the user wants to reduce power consumption in consideration of device restrictions, as shown in FIG. 14 (B), the time output constraint of each facility is added to the constraint condition and the optimal distribution of each facility is performed. The user selects a recommended locus. In this way, calculating the recommended trajectory desired by the user by changing the load at a certain rate, optimally distributing, and letting the user set in advance on the condition that the device is optimally distributed based on the constraints of the device Can do. If a plurality of conditions are selected, a plurality of recommended trajectories can be calculated and displayed, and the plant can be operated while comparing each recommended trajectory.

  As shown in FIG. 15, the plant operation support apparatus 3 may be configured such that the actual locus when the operation of the plant 2 is actually changed from the current point is further displayed on the total energy consumption range display screen. Good. FIG. 15 is a diagram illustrating a third example of the total energy consumption range display screen.

  For example, in the process of actually changing the operation of the air conditioning system 2 from the current point to the target point, the actual value of total load and the corresponding actual value of total energy consumption are measured in the plant 2 and input as actual trajectory data It is held by the data holding unit 31. FIG. 15A is an example of actual trajectory data. As shown in FIG. 15 (A), the actual trajectory data includes the actual value [kW] of the total heat load and the corresponding actual value [kW] of the total power consumption for each predetermined interval (for example, 10 minutes). May be included. The output unit 34 uses the actual trajectory data to create total energy consumption range display data in which the actual trajectory is displayed on the screen together with the recommended trajectory within the executable region. Then, the output unit 34 outputs the created total energy consumption range display data to the terminal device 4. The terminal device 4 displays a total energy consumption range display screen as shown in FIG. 15B on the display unit 43 according to the input total energy consumption range display data.

  The operator of the plant 2 compares the recommended locus on the total energy consumption range display screen with the actual locus so that the operation of the plant 2 is changed toward the target point as planned (that is, according to the recommended locus). It can be determined whether or not.

  Further, as shown in FIG. 16, the plant operation support apparatus 3 may be configured such that a region between the recommended trajectory and the lower limit of the executable region is highlighted on the total energy consumption range display. FIG. 16 is a diagram showing a fourth example of the total energy consumption range display screen.

  For example, the output unit 34 specifies the surplus total energy consumption region between the recommended locus and the lower limit of the executable region based on the recommended locus data and the executable region data. The output unit 34 creates data in which the specified surplus total energy consumption region is visually highlighted and outputs the data to the terminal device 4. The terminal device 4 displays a total energy consumption range display screen as shown in FIG. 16 on the display unit 43 according to the input data. In the example shown in FIG. 16, the surplus total consumed energy region is highlighted by being darkly painted.

  As described above, the difference between the recommended trajectory and the lower limit point of the feasible area with respect to the total energy consumption corresponds to the surplus total energy consumed when the operation of the plant 2 is changed according to the recommended trajectory. Therefore, the operator can immediately grasp how much waste is generated in the total energy consumption of the entire plant 2 in the process of changing the operation of the plant 2 according to the recommended trajectory by highlighting on the total energy consumption range display screen. Can do.

  Furthermore, as shown in FIG. 17, the plant operation support apparatus 3 is displayed so that surplus total energy consumption that occurs when the operation of the plant 2 is changed according to the recommended trajectory is displayed separately from the total energy consumption range display screen. It may be configured. FIG. 17 is a diagram illustrating an example of a surplus total consumption energy display screen.

  For example, the output unit 34 calculates the difference between the total energy consumption corresponding to the total load on the recommended locus and the lower limit value of the total energy consumption corresponding to the total load in the executable region in time series. The output unit 34 generates surplus energy display data in which the calculated difference is displayed on the screen in time series, and outputs the surplus energy display data to the terminal device 4. The terminal device 4 displays a surplus energy display screen as shown in FIG. 17 on the display unit 43 according to the input surplus energy display data. In the example shown in FIG. 17, the time change of surplus energy consumption that occurs between the current time 17:00 and the predicted time 18:00 is displayed.

  The operator can immediately grasp how much waste is generated in the total energy consumption of the entire plant 2 in the process of changing the operation of the plant 2 according to the recommended trajectory by referring to the surplus energy display screen.

  Moreover, you may comprise the plant operation assistance apparatus 3 so that the load distribution display screen as shown in FIG. 18 may be displayed further. FIG. 18 is a diagram illustrating an example of a load distribution display screen. As shown in FIG. 18, on the load distribution display screen, the load of each facility 22 in the process of changing the total load in the entire plant 2 from the total load corresponding to the current point to the total load corresponding to the target point according to the recommended locus. Are displayed in chronological order.

  For example, in the process in which the total load of the entire plant 2 is changed from the current total load to the total load prediction value, the recommended trajectory when the load of each facility 22 is changed at a constant rate in time is the recommended trajectory calculation unit 323. Is calculated by As described above, the load on each facility 22 corresponding to the total load on the recommended locus is calculated by the recommended locus calculator 323. Therefore, the output unit 34 creates load distribution display data using the load of each facility 22 calculated by the recommended trajectory calculation unit 323 and outputs the load distribution display data to the terminal device 4.

  Further, for example, in the process of changing the total load of the entire plant 2 from the current total load to the total load predicted value, the load of each facility 22 is optimally distributed so that the total power consumption of the entire plant 2 is minimized. In this case, the recommended locus calculation unit 323 calculates the recommended locus. As described above, the optimum distribution load of each facility 22 corresponding to the total load on the recommended locus is calculated by the optimum distribution calculation unit 322. Therefore, the output unit 34 creates load distribution display data using the optimal distribution load of each facility 22 calculated by the optimal distribution calculation unit 322 and outputs the load distribution display data to the terminal device 4.

  The terminal device 4 displays a load distribution display screen as shown in FIG. 18 on the display unit 43 according to the input load distribution display data. In the example shown in FIG. 18, in the process in which the total load of the entire plant 2 is changed from the current total load to the total load prediction value, the load of each facility 22 is changed at a constant rate in time. The load is displayed in chronological order. In addition, as shown in FIG. 18, the time change of the total load of the whole plant 2 and the time change of the total energy consumption of the whole plant 2 may be further displayed.

  The operator of the plant 2 operates each facility 22 so that the operation of the plant 2 is changed from the current point to the target point according to the recommended trajectory. Therefore, if the load of each facility 22 in the process of changing the total load from the total load corresponding to the current point to the total load corresponding to the target point according to the recommended trajectory is displayed in time series, the operator is displayed. Each facility 22 can be easily operated along the trajectory.

The present invention is not limited to the above embodiments, and various improvements and modifications can be made without departing from the scope of the present invention.
For example, each component included in the plant operation support apparatus 3 may be distributed and arranged in a plurality of arbitrary information processing apparatuses included in the plant operation system 1. In such an embodiment, the plurality of information processing apparatuses are connected to each other via wired and / or wireless communication, and the components arranged in a distributed manner cooperate with each other.

  FIG. 19 is a diagram illustrating a configuration example of an information processing device included in the plant operation system according to the embodiment. In the configuration example illustrated in FIG. 19, the information processing device 5 includes a CPU 51 that is an example of a processor, a main storage device 52 such as a RAM, and an auxiliary storage device 53 such as a hard disk drive. The information processing apparatus 5 further includes an input device 54 such as a keyboard and a mouse, and an output device 55 such as a liquid crystal display or a CRT display. The information processing device 5 includes a portable storage medium read / write device 56 that writes data to and reads data from the portable storage medium, and a communication interface device 57 that is connected to a communication network such as the Internet or an intranet. In addition. These components 51 to 57 included in the information processing apparatus 5 are connected to each other via a bus 58.

  Among the constituent elements included in the plant operation support device 3, the input data holding unit 31 and the generated data holding unit 33 can be mounted on the main storage device 52 and the auxiliary storage device 53, for example. The total load prediction unit 321, the optimum distribution calculation unit 322, the recommended trajectory calculation unit 323, and the total consumption energy range calculation unit 324 can be mounted on the CPU 51, for example. The output unit 34 can be mounted on the CPU 51 and the communication interface device 57, for example.

  Even when each component included in the plant operation support apparatus 3 is distributed to the plurality of information processing apparatuses 5, the above-described effects can be obtained.

DESCRIPTION OF SYMBOLS 1 Plant operation system 2 Plant 3 Plant operation support apparatus 4 Terminal apparatus 5 Information processing apparatus 21 Resource (electric power)
22 (22-1 to 22-4) Equipment (refrigerator)
23 Consumers (Air-conditioning target space)
31 Input Data Holding Unit 32 Plant Analysis Unit 33 Generated Data Holding Unit 34 Output Unit 41 Input Unit 42 Processing Unit 43 Display Unit 44 Communication Unit 51 CPU
52 Main storage device 53 Auxiliary storage device 54 Input device 55 Output device 56 Portable storage medium read / write device 57 Communication interface device 321 Total load prediction unit 322 Optimal distribution calculation unit 323 Recommended trajectory calculation unit 324 Total energy consumption range calculation unit

Claims (11)

Pre-set a recommended trajectory representing the process of changing the plant operation from the current point specified by the total energy consumption current value to the total load current value to the target point specified by the total energy consumption target value for the total load forecast value A recommended trajectory calculation unit that calculates based on the determined conditions;
A system model formula representing the relationship between the load of each facility included in the plant and the total load of the entire plant, the relationship between the energy consumption of each facility and the total energy consumption of the entire plant; By generating a first-order predicate logical expression from the equipment model formula expressing the relationship between the load of the equipment and the energy consumption, and applying a quantifier elimination algorithm to the first-order predicate logical expression, and total consumption energy range calculation unit for calculating a total consumed energy range equations representing the range where the total energy consumption can be taken with respect to the total load,
A plant operation support apparatus comprising: an output unit that generates and outputs total energy consumption range display data in which the recommended trajectory is displayed on the screen together with the executable region represented by the total energy consumption range formula. The plant operation support device according to claim 1,
The output unit creates and outputs the total energy consumption range display data in which the actual locus when the operation of the plant is actually changed from the current point is further displayed on the screen.
Plant operation support device. A plant operation support device according to any one of claims 1 to 2,
The recommended trajectory calculation unit, in the process of being changed from said total load current value to the total load prediction value corresponding to the target point, the recommendation if the previous SL load of each equipment is changed temporally constant rate Calculate the trajectory,
Plant operation support device. A plant operation support device according to any one of claims 1 to 2,
The recommended trajectory calculation unit optimizes the load of each facility so that the total energy consumption of the entire plant is minimized in the process of changing from the current total load value to the predicted total load value corresponding to the target point. Calculating the recommended trajectory when distributed,
Plant operation support device. The plant operation support device according to claim 4,
The recommended trajectory calculation unit calculates the recommended trajectory when the load of each facility is optimally distributed by adding the temporal output constraint of each facility to the constraint condition.
Plant operation support device. It is a plant operation support device according to any one of claims 1 to 5,
The output unit creates and outputs the total energy consumption range display data in which a region between the recommended locus and the lower limit of the executable region is further highlighted.
Plant operation support device. A plant operation support device according to any one of claims 1 to 6,
The output unit calculates, in time series, the difference between the total energy consumption corresponding to the total load on the recommended locus and the lower limit value of the total energy consumption corresponding to the total load on the recommended locus in the executable region. Calculate and output surplus consumption energy display data in which the difference is displayed on the screen in time series, and output it.
Plant operation support device. It is a plant operation support device according to any one of claims 1 to 7,
The output unit determines whether the load of each facility in the process of changing the total load in the entire plant from the total load current value corresponding to the current point to the predicted total load value corresponding to the target point according to the recommended locus. Create and output load distribution display data displayed on the screen in series,
Plant operation support device.   A condition related to the plant operation support is transmitted to the plant operation support apparatus, and the total energy consumption range display data in which the recommended locus calculated by the condition is displayed on the screen together with the executable area represented by the total energy consumption range formula is displayed on the plant. A display device that receives from an operation support device, processes the total energy consumption range display data, and displays a total energy consumption range display screen including the executable region and a recommended locus according to the processing result of the total energy consumption range display data When,
  The recommended trajectory representing the process of changing the operation of the plant from the current point specified by the total energy consumption current value with respect to the total load current value to the target point specified by the total energy consumption target value with respect to the total load predicted value Calculated based on the conditions, the relationship between the load of each facility included in the plant and the total load of the entire plant, and the relationship between the energy consumption of each facility and the total energy consumption of the entire plant were expressed. A first-order predicate logical expression is generated from a system model mathematical expression and a facility model mathematical expression expressing the relationship between the load and the energy consumption of each facility, and a quantifier elimination algorithm is applied to the first-order predicate logical expression By calculating a total energy consumption range formula representing a range that the total energy consumption can take for the total load of the entire plant, And plant operation support apparatus for outputting said recommended path with executable area represented by the consumed energy range equation
Including plant operation support system. Pre-set a recommended trajectory representing the process of changing the plant operation from the current point specified by the total energy consumption current value to the total load current value to the target point specified by the total energy consumption target value for the total load forecast value A recommended trajectory calculation unit that calculates based on the determined conditions;
A system model formula representing the relationship between the load of each facility included in the plant and the total load of the entire plant, the relationship between the energy consumption of each facility and the total energy consumption of the entire plant; By generating a first-order predicate logical expression from the equipment model formula expressing the relationship between the load of the equipment and the energy consumption, and applying a quantifier elimination algorithm to the first-order predicate logical expression, and total consumption energy range calculation unit for calculating a total consumed energy range equations representing the range where the total energy consumption can be taken with respect to the total load,
A plurality of information processing devices in which output units for creating and outputting total energy consumption range display data in which the recommended trajectory is displayed on the screen together with the executable region represented by the total energy consumption range formula are distributed and arranged Including,
Plant operation system. A recommended trajectory representing the process of changing the operation of the plant from the current point specified by the current total energy consumption value relative to the current total load value to the target point specified by the previous total energy consumption target value relative to the total load predicted value in advance Calculate based on the set conditions,
A system model formula representing the relationship between the load of each facility included in the plant and the total load of the entire plant, the relationship between the energy consumption of each facility and the total energy consumption of the entire plant; By generating a first-order predicate logical expression from the equipment model formula expressing the relationship between the load of the equipment and the energy consumption, and applying a quantifier elimination algorithm to the first-order predicate logical expression, the entire plant the total consumed energy range equations representing the range where the total energy consumption can be taken with respect to the total load is calculated,
A plant operation support method executed by the plant operation support apparatus , comprising: generating and outputting total energy consumption range display data in which the recommended trajectory is displayed on the screen together with the executable region represented by the total energy consumption range formula.