JP2005257097A - Start/stop plan formulation system for heat source device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an utility device start/stop plan creating system capable of surely obtaining the optimum schedule without going through a problem on a non-linear mixed integer plan which is hardly solved in a practical use scale. <P>SOLUTION: In operating a plant having a plurality of heat source devices or generators by using a graphical user interface, a stop data input means 2 inputs each time data of operation and stop in a specific period from the external and displays an operation stop state in accordance with a heat demand prediction trend of the specific period, an operation plan creating means 3 creates the operation plan of the device on the basis of the predicted amount demanded, and the time data of start and stop of the device input from the external, and a primary energy evaluating means 4 calculates and displays amounts of consumption of fuel and electricity or the operation cost of the plant of the specific period on the basis of the operation plan. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention is a utility device that formulates start / stop of a heat source device using a graphical user interface (GUI) when operating a plurality of heat source devices such as generators and refrigerators in buildings, hospitals, heat supply plants, etc. The present invention relates to a start / stop planning system.

  In conventional heat source equipment monitoring and control systems, the start and stop of heat source equipment and generators are basically based on short-term demand forecasts of several hours, and the method of determining the type and number of operating equipment that satisfies the demand is adopted. (For example, refer to Patent Document 1). In these systems, in some cases, the combination that achieves the most energy saving or the lowest cost has been selected. For this purpose, the calculations executed vary greatly depending on the target plant. For example, in a heat source device having a storage battery or a heat storage layer, it is necessary to optimize daily operation. That is, in these heat source devices, since it is necessary to optimize operations such as storing electricity at night and discharging in the daytime, it is necessary to collectively handle one cycle as the operation.

On the other hand, when there is no storage battery or heat storage layer, instantaneous optimization can be performed, so the operation to be executed is greatly simplified, but even in that case, the time constant is as in an absorption refrigerator. If it is large, a large optimization calculation is required. These optimization operations generally employ nonlinear mixed integer programming. The reason why the nonlinearity is entered is because the equipment characteristics, for example, the relationship between the fuel consumption and the power generation output is not linear, and the mixed integer design is because the equipment is started and stopped. Although it is a nonlinear mixed integer programming method that must be solved in this way, it has not been easy to solve in a practical time for an actual large-scale plant.
JP-A-8-145435

  A simple explanation of the size of the nonlinear mixed integer plan that appears in the creation of the optimal operation plan of the utility is, for example, a heat storage including an on / off operation every 30 minutes as an optimal operation plan for 10 devices. When trying to solve the optimal operation problem of a plant having a tank, there are 48 × 10 = 480 variables of on and off. Solving such a large problem by nonlinear mixed integer programming is very strict, and often falls into a local optimal solution and an appropriate solution cannot be obtained.

  As a result, the utility's optimal operation planning system has been put to practical use in systems without thermal storage tanks or storage batteries, but it can be fully utilized for systems with thermal storage tanks or storage batteries that have truly high needs for optimal planning. Did not come.

  The present invention has been made to solve the above problems, and its purpose is to start utility equipment that can reliably obtain an optimal schedule without falling into a nonlinear mixed integer programming problem that has been difficult to solve on a practical scale. It is to provide a stop planning system.

  The invention according to claim 1 is a utility device activation / deactivation plan formulation system for devising activation / deactivation of a heat source device using a graphical user interface when operating a heat supply plant having a plurality of heat source devices, and for a predetermined period of time Heat demand forecasting means to display the heat demand forecast trend of the heat source, and start the heat source equipment to display the operation stop status by inputting the time data of the heat source equipment operation and stop for a predetermined period from the outside according to the heat demand forecast trend Stop data input means, operation plan creation means for creating an operation plan of the heat source equipment based on the predicted heat demand and the start and stop time data of the heat source equipment input from the outside, and the created operation plan Primary energy that calculates and displays fuel and electricity consumption or operating costs for a heat supply plant for a given period based on It is obtained by a valence means.

  The invention according to claim 2 is the utility device start / stop plan formulation system according to claim 1, wherein the predetermined period is one day.

  The invention according to claim 3 is the utility device start / stop plan formulation system according to claim 1, wherein the operation plan creation means is a heat demand prediction value for the heat source device in the activated state at every predetermined time in a predetermined period. And the load allocation optimization calculation is executed for the energy consumption or cost, or various evaluation functions.

  The invention according to claim 4 is the utility device start / stop plan formulation system according to claim 3, wherein the load distribution optimization calculation uses a nonlinear optimization planning method.

  According to a fifth aspect of the present invention, in the utility device start / stop plan formulation system according to the third aspect, the start / stop data input means of the heat source device displays a trend of the sum of the heat capacities of the started heat source devices for a predetermined period.

  The invention according to claim 6 is the utility equipment start / stop plan formulation system according to any one of claims 1 to 5, wherein the heat supply plant has a heat storage tank, and the start / stop data input means of the heat source equipment is: Calculate and display heat storage tank utilization.

  The invention according to claim 7 is the utility device start / stop plan formulation system according to claim 6, and a function for calculating the heat storage amount of the heat storage tank based on the predicted heat demand value and the operation plan of the heat source device, and the calculated heat storage amount It has the function to output the time trend of.

  The invention according to claim 8 is the utility device start / stop plan formulation system according to claim 6, wherein the primary energy evaluation means calculates the heat storage amount of the heat storage tank based on the predicted heat load and the heat source operation plan and the heat storage It has a function to display an alarm when the amount falls below the lower limit value or deviates from the operating range.

The invention according to claim 9 is a utility device activation / deactivation plan formulation system that formulates activation / deactivation of a utility using a graphical user interface when operating a utility having a storage battery and a plurality of generators. A power demand forecasting means for displaying a demand forecast trend;
In accordance with the power demand forecast trend, the generator start / stop data input means for inputting the time data of the generator operation and stop in the predetermined period from the outside and displaying the start / stop state, the predicted power demand amount and the external An operation plan creation means for creating an operation plan of the generator based on the start / stop time data of the generator input from, and the fuel consumption or operation cost of the utility for a predetermined period based on the created operation plan Primary energy evaluation means for calculating and displaying.

  According to a tenth aspect of the present invention, in the utility device activation / deactivation plan formulation system according to the ninth aspect, the operation plan creation means relates to a predicted power demand value for the activated generator at predetermined time intervals in a predetermined period. And the load allocation optimization calculation is executed for the energy consumption or cost, or various evaluation functions.

  The invention according to claim 11 is the utility device start / stop plan formulation system according to claim 10, wherein the load distribution optimization calculation uses a non-linear optimization planning method.

  According to a twelfth aspect of the present invention, in the utility device start / stop plan formulation system according to the ninth aspect, the start / stop data input means displays a trend of the sum of the power generation capacities of the started generators for a predetermined period.

  According to a thirteenth aspect of the present invention, in the utility device start / stop plan planning system according to any one of the ninth to twelfth aspects, the start / stop data input means calculates and displays the storage battery utilization rate.

  According to a fourteenth aspect of the present invention, in the utility device start / stop plan formulation system according to the ninth aspect, a function for calculating the storage amount of the storage battery based on the predicted power demand value and the operation plan of the generator and the calculated storage amount It has a function to output a time trend.

  According to a fifteenth aspect of the present invention, in the utility device start / stop plan formulation system according to the ninth aspect, the primary energy evaluation means has a function of calculating the storage amount of the storage battery based on the important power prediction value and the generator operation plan, and the storage It has a function to display an alarm when the amount falls below the lower limit value or deviates from the operating range.

  The present invention can avoid starting and stopping problems that are difficult to solve automatically by first inputting the starting and stopping of equipment while watching the demand for heat or electricity. The operation of each device may be performed by solving the capacity optimal allocation problem at each time using a given operable device. The capacity optimal allocation problem becomes a nonlinear continuous optimization problem, and since there are no integer variables, a significant reduction in calculation time is achieved. In general, the calculation result is more stable than the mixed integer design.

  Hereinafter, the present invention will be described in detail based on preferred embodiments shown in the drawings. FIG. 1 is a block diagram showing a configuration of an embodiment in which a utility device start / stop plan creation system according to the present invention is applied to an optimum operation system of a heat supply plant having a heat storage tank. This embodiment is realized by a graphical user interface (GUI), which predicts heat demand for a predetermined period and displays the trend, and an operation planner according to the heat demand forecast trend and heat source equipment. The heat source equipment activation / stop data input means 2 for inputting the start / stop time data of the boiler and displaying the state thereof, and the boiler heat based on the predicted heat demand and the start / stop time data of the heat source equipment input from the outside Boiler operation plan creation means 3 for creating an operation plan and primary energy evaluation means 4 for evaluating primary energy based on the created operation plan are provided.

  The operation of the present embodiment configured as described above will be described below with reference to FIGS. FIG. 2 is an example of a screen for explaining the operation of the heat demand prediction display means 1, and the predicted values of humidity and temperature every three hours are input into the input fields shown in FIG. Note that for simplicity of the drawing, only three input fields of morning, noon, and night are shown in FIG. 5C, but generally, this is a value obtained from a weather forecast, and every three hours. Data can be input easily. According to this input data, the heat demand predicting means 1 displays the temperature and humidity as shown in FIG. Subsequently, the heat demand of the day is predicted and calculated using the temperature and humidity displayed as a graph as variables, and displayed as a graph that changes over time as shown in FIG. Since various methods for predicting and calculating the heat demand have been proposed and known, an appropriate method is selected and used.

  FIG. 3 is an example of a screen for explaining the operation of the heat source device start / stop data input means 2 for inputting the start / stop state of the heat source device. In this case, as shown in FIG. 5B, five refrigerators are displayed in the center of the screen, and the operation planner inputs data for specifying the start and stop times for each. Here, the horizontal axis represents time, and “1” or “0.5” indicating whether the operation state is rated or half is input together. Note that the blank portion represents a stopped state. At this time, the heat source device activation / stop data input means 2 draws the total capacity of the refrigerator for each time, as shown in FIG. The predicted value of the cold water demand corresponding to the above-mentioned heat demand is also plotted in FIG. From these two diagrams, it can be seen that there is an excess or deficiency of production cold water by the refrigerator at each time, and the deficiency is supplied from the heat storage tank. Since the heat storage tank has a maximum supply capacity per hour and a limit on the supply amount per day, the time when the heat storage tank cannot be supplied is changed to a red display, for example. If it is within the limit, the utilization rate of the heat storage tank is calculated according to the following formula from the amount of heat supplied and the capacity of the heat storage tank, and displayed in a predetermined column as shown in FIG.

Heat storage utilization rate = heat storage tank heat consumption / heat storage tank capacity
In addition, the heat source device activation / deactivation data input means 2 simultaneously outputs an output that matches the predicted heat demand value for the activated heat source device on the premise of the operation status of the input heat source device at each time and is consumed. Load distribution optimization is performed by using nonlinear optimization programming for energy or cost, or various evaluation functions, thereby calculating the daily steam consumption and electricity consumption. The required amount of steam is the value calculated from the load and efficiency characteristics of each refrigerator and added to all refrigerators. The amount of electricity is the sum of the electric power consumed by the chilled water and the cooling water pump as the refrigerator is operated. If you have an electric refrigerator, add its power.

  FIG. 4 is an example of a screen for explaining the operation of the boiler operation plan creation means 3 and the primary energy evaluation means 4. In planning the operation schedule of the boiler that produces the steam necessary for the refrigerator, FIG. As shown in FIG. 3, the operation planner inputs start and stop status data at each time to each boiler. In the figure, the portion indicated by “1” is the operating state, and the blank portion indicates that the vehicle is not operating. Accordingly, the steam production capacity and the steam demand of the boiler at each time are displayed as shown in the graph of FIG. Boiler operation is set to exceed demand. Then, as shown in FIG. 5C, the daily gas consumption and the electricity consumption required by the primary energy evaluation means 4 are calculated based on the operation plan and the characteristics of the boiler. 5A and 5B are screen examples in which the calculation results are plotted for each time.

  The operation planner can determine the optimum operation schedule by looking at the daily power requirement and gas requirement and inputting the start and stop schedules of the refrigerator and the boiler on a trial and error basis. Generally, refrigerators and boilers are not frequently started and stopped, and since the same operation is repeated every day, setting of starting and stopping is not so difficult for the operation planner. Therefore, an optimal schedule can be easily obtained.

  The primary energy evaluation means has a function of calculating the heat storage amount of the heat storage tank based on the predicted heat load in the heat demand prediction means 1 and the heat source operation plan of the boiler operation plan creation means 3, and the heat storage amount is a lower limit value. It also has a function of displaying an alarm when it becomes below or when it deviates from the operating range.

  In the present embodiment, the heat supply plant having the heat storage tank is the target of the start / stop plan, but the power generation system including the storage battery can be constructed in exactly the same manner as described above. In that case, instead of the heat storage utilization rate, the power storage utilization rate becomes an index indicating the effective use of the system.

The block diagram which shows the structure of one Embodiment which applied the utility apparatus starting stop plan preparation system which concerns on this invention to the optimal operation system of the heat supply plant provided with the heat storage tank. The example of a display screen for demonstrating operation | movement of the heat demand prediction display means which comprises embodiment shown in FIG. The example of a display screen for demonstrating operation | movement of the heat-source apparatus starting and stop data input means which comprises embodiment shown in FIG. The example of a display screen for demonstrating operation | movement of the boiler operation plan preparation means and primary energy evaluation means which comprise embodiment shown in FIG. The display screen example which plotted the calculation result of the primary energy evaluation means shown in FIG. 1 about each time.

Explanation of symbols

1 heat demand prediction means 2 heat source equipment start / stop data input means 3 boiler operation plan creation means 4 primary energy evaluation means

Claims (15)

In operating a heat supply plant having a plurality of heat source devices, a utility device start / stop plan formulation system that determines start / stop of the heat source device using a graphical user interface,
A heat demand prediction means for displaying a heat demand prediction trend for a predetermined period;
According to the heat demand prediction trend, start and stop data input means of the heat source device that displays the operation stop state by inputting each time data of operation and stop of the heat source device in a predetermined period,
An operation plan creation means for creating an operation plan of the heat source device based on the predicted heat demand and the time data of start and stop of the heat source device input from the outside;
Primary energy evaluation means for calculating and displaying the fuel and electricity consumption or operation cost of the heat supply plant for a predetermined period based on the created operation plan;
Utility equipment start / stop plan formulation system with   The utility device start / stop plan formulation system according to claim 1, wherein the predetermined period is one day.   The operation plan creation means is configured to distribute the load for energy consumption or cost, or various evaluation functions with respect to the heat demand prediction value for the heat source device in the activated state at predetermined time intervals in a predetermined period. The utility device start / stop plan formulation system according to claim 1, which executes an optimization operation.   4. The utility device start / stop plan formulation system according to claim 3, wherein the load distribution optimization calculation uses a nonlinear optimization planning method.   4. The utility device start / stop plan formulation system according to claim 3, wherein the start / stop data input means of the heat source device displays a trend of the total heat capacity of the started heat source devices over a predetermined period.   The utility device start / stop plan formulation according to any one of claims 1 to 5, wherein the heat supply plant has a heat storage tank, and the start / stop data input means of the heat source device calculates and displays the heat storage tank utilization rate. system.   The utility according to claim 6, further comprising a function of calculating a heat storage amount of a heat storage tank based on the predicted heat demand value and an operation plan of the heat source device and a function of outputting a time trend of the calculated heat storage amount. Equipment start / stop planning system.   The primary energy evaluation means generates an alarm when the heat storage capacity of the heat storage tank is calculated based on the predicted heat load and the heat source operation plan, and when the heat storage amount falls below the lower limit value or deviates from the operation range. The utility device start / stop plan formulation system according to claim 6 having a function of displaying. When operating a utility having a storage battery and a plurality of generators, a utility device start / stop plan formulation system that formulates start / stop of the utility using a graphical user interface,
A power demand forecasting means for displaying a power demand forecast trend for a predetermined period;
In accordance with the power demand forecast trend, the generator start / stop data input means for displaying the start / stop state by inputting each time data of the operation and stop of the generator in a predetermined period from the outside,
An operation plan creation means for creating an operation plan of the generator based on the predicted power demand and the time data of start and stop of the generator input from the outside;
Primary energy evaluation means for calculating and displaying the fuel consumption or operation cost of the utility for a predetermined period based on the created operation plan;
Utility equipment start / stop plan formulation system with   The operation plan creation means outputs the power demand predicted value for the activated generator at predetermined time intervals in a predetermined period, and distributes the load for energy consumption or cost, or various evaluation functions. The utility device start / stop plan formulation system according to claim 9, which executes an optimization operation.   11. The utility device start / stop plan formulation system according to claim 10, wherein the load distribution optimization calculation uses a nonlinear optimization planning method.   10. The utility device activation / deactivation plan formulation system according to claim 9, wherein the activation / deactivation data input means displays a trend of the total power generation capacity of activated generators for a predetermined period.   The utility device start / stop plan formulation system according to any one of claims 9 to 12, wherein the start / stop data input means calculates and displays a storage battery utilization rate.   The utility device start / stop plan formulation system according to claim 9, which has a function of calculating a storage amount of the storage battery based on the predicted power demand value and a generator operation plan and a function of outputting a time trend of the calculated storage amount. .   The primary energy evaluation means displays an alarm when a function for calculating the storage amount of the storage battery based on the important power prediction value and the generator operation plan and when the storage amount falls below the lower limit value or deviates from the operation range. The utility device start / stop plan formulation system according to claim 9, which has a function of:

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