JP3162209B2 - Energy system and operation control method thereof - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an energy system for supplying heat or cold to a user by using a heat source device having a plurality of energy sources as inputs, and an operation control method thereof.

[0002]

2. Description of the Related Art Many reports or applications have been made on an energy system for supplying a user with hot or cold heat from a heat source device having a plurality of energy sources as input and an operation control method thereof. For example, Ito et al., “Optimal Design for Component Size of Ship Heat and Power Supply Plant” (Transactions of the Japan Society of Mechanical Engineers (C), Vol. 51, No. 467 (
60-7), p1663-1670), report on the method of optimizing the scale of heat source equipment and electric power equipment using mathematical programming, and to formulate an optimal operation plan according to demand for scale optimization. Is used, and a mixed integer programming method using a branch and bound method is used as a technique for that.

Japanese Patent Application Laid-Open No. 60-11046 discloses a method of operating a heat source device in which operation modes such as a forced stop, a peak cut of power consumption, and a heat storage operation are divided into a plurality of time periods. In addition, there is described an operation control method of a heat source device that improves the heat storage efficiency and reduces the operation cost by allocating each mode for each time zone. Each mode is set in advance, and an algorithm for controlling on / off of each mode is proposed. However, there is no particular reference to changing the set value of each mode.

Japanese Patent Application Laid-Open No. 3-291439 discloses a daily predicted load curve input from predicted load data input means in a heat source plant for generating cold water, hot water and the like for district cooling and heating. Discretized by the load band producing means, and quantized for each time, and classified into any of the preset load bands, and the operation mode candidates of the classified load band are operated by the operation mode selecting means. An operation control device of a heat source plant is described in which a plurality of operation costs are selected from a list table in ascending order of operation cost, an operation pattern is created through the selected operation pattern creation means, and an operation schedule is formulated. I have.

[0005]

In the prior art as described above, the method of optimizing the scale of the heat source equipment and the power equipment by using a mathematical programming method is based on the fact that a mathematical programming technique is used. It is difficult to apply this method to an object whose objective function and the like cannot be formulated by mathematical expressions.

The means described in Japanese Patent Application Laid-Open No. 60-11046, Japanese Patent Application Laid-Open No. 3-291439, and the like are basically intended to basically select an inexpensive energy source. In other words, it can be said that the costs are compared for each operation mode, and each operation mode is selected and assigned in ascending order of the operation cost. In other words, the conventional operation method of the heat source equipment is, as it were, to pursue economical efficiency, and does not describe the concept of controlling by changing a plurality of types of energy supply amounts and charge ratios.

By the way, recent global environmental problems, for example,
In response to measures such as acid rain prevention and global warming prevention, the amounts and types of various types of emissions from these energy plants have been regarded as problems, and clean and small amounts of exhaust have been demanded. And, based on that request,
It is becoming necessary to reduce the amount of energy generated and to switch the fuel used. Energy plants, such as district heating and cooling plants, are facilities with a strong public element, and there is a tendency for the use of third sector schemes, usually funded by local governments and energy-related companies such as electric power companies and gas companies.

When pursuing a cost minimum in such a situation, it is necessary to simply operate the vehicle with emphasis on economy as in the past.
In addition to control, other constraints, such as constraints to reduce environmental impact, or equalization of the profits and usage of the invested energy companies, etc.
It is necessary to pursue a cost minimum under constraints that have not been considered before.

To this end, as an operation control method, not only the conventional approach of maximizing the equipment efficiency and the operation efficiency, but also the use ratio or the use charge ratio of various types of energy is specified according to the situation. The need to pursue economics, a challenge, is emerging. The present invention has been made in view of such circumstances, and provides flexibility in the operation method of the heat source equipment plant, so that even if the amount of primary energy used is changed, it is possible to formulate an optimal operation plan according to the change. It is an object to obtain an energy system and an operation control method thereof.

[0010]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and basically, a usage ratio or a usage fee ratio of a plurality of different types of energy is prioritized by designation of an operator. This can be achieved by setting a mode setting means that can be made variable. More specifically,
In order to achieve the above object, the present invention has a heat source equipment plant having at least two types of primary energy sources as inputs, a control unit of the heat source equipment plant, and a database of the heat source equipment plant. In the operation method of the energy system, an operation mode is provided in which at least the usage rate of the primary energy is not changed for a certain period, and the control means of the heat source equipment plant is controlled under the operation mode to change the supply heat energy. An energy system and an operation control method for the energy system are disclosed.

[0011] In setting the usage rate of the primary energy, setting an operation mode that is constant for a certain period based on the consumption rate of the primary energy is a method of controlling the operation of the energy system by the third sector method. This is a particularly preferred embodiment.

[0012]

According to the present invention, there is provided an operation control method which preferentially designates a usage ratio or a usage charge ratio of various types of energy in accordance with the situation by having the above-described configuration, and pursues the conventional economy among them. It is possible to perform operations that maximize the conventional equipment efficiency and operation efficiency, and not only can effective responses to environmental destruction be possible,
It is also possible to smoothly operate the energy system of the third sector system.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in more detail with reference to embodiments. FIG. 1 shows the basic configuration of the energy system according to the present invention. This system uses the database 1000
A mode setting function 2000, a control function 3000,
The heat source equipment plant 4000 having at least two types of primary energy sources as inputs has a basic function.

The database 1000 stores the operation performance and operation history of equipment used in the heat source equipment plant 4000, the demand status of the heat source, and the relation between the operation amount at that time, the usage amount of the primary energy and the fee, and the like. ing. In the mode setting function 2000, the manipulated variable set value 20 corresponding to the mode value set by the operator is output to the control function 3000.

The control function 3000 has an operation amount set value 20.
In response to this, control command 30 which is an operation amount of various heat source devices in heat source equipment plant 4000, which is assumed from operation amount set value 20, is output to heat source equipment plant 4000.
In the heat source equipment plant 4000, various heat source equipments are controlled based on the control command 30, and required electric power 40,
Cold water 41, hot water 42, and steam 43 are supplied to the customer.

The mode setting function 2000 will be described in detail with reference to FIG. The mode setting function 2000 includes a mode setting menu 2100, a mode input function 2200, and a mode calculation function 2300. The mode setting menu 2100 is stored in a memory area in the mode calculation function 2300, and is automatically or manually output from the mode calculation function 2300 as necessary and monitored by an operator. It is displayed on the screen of the apparatus or provided on the operation panel in which the mode calculation function 2300 is stored.

The mode setting menu 2100 is a state in which the operator waits for the operator to input menu settings when preparing an operation plan for the next operation cycle or when a higher-level manager requests a change in the operation mode setting. become. When the operator inputs a menu setting key, the manipulated variable set value 2
Outputs 0. For example, when the primary energy used is two types of power and gas, the displayed menu includes high efficiency operation, power / gas operating cost ratio, power / gas usage ratio, maximum power usage, and the like. is there. The mode setting menu 2100 displayed on the screen by the operator
, And when a desired operation mode is selected in the time zone, the screen display is switched to the screen of the mode input function 2200.

More specifically, a power / gas operating cost ratio or a power / gas usage ratio is displayed from a display menu.
When the user selects to keep the power / gas operating cost ratio or the power / gas usage ratio on the screen display of the mode input function 2200 when the user selects to keep it constant within a predetermined period (usually a constant cycle) in the future. You. When the operator instructs to set the ratio on the screen, the mode calculation function 23
00 is a comparison of the integrated value of the operating cost or the usage amount up to that based on the information from the database 1000,
The amount of electric power and gas used in the future is calculated so that the ratio becomes the set value, and the calculation result is sent to the control function 3000 as the manipulated variable set value 20.

The control function 3000 receives the manipulated variable set value 20 and uses the manipulated variable set value 20 as a constraint condition.
The operation load factor of the heat source device in the 000 is calculated, and the control command 30 is sent as the control command of the heat source device 4000, so that necessary energy is generated and supplied to a required customer. The operation in the mode input function 2200 can be performed by key input of a set value on the screen using a keyboard attached to the mode calculation function 2300, or a dial, button, or the like indicating a set value on the screen can be indicated by a finger, pen, or mouse. The movement can be performed by various methods such as a method by voice of an operator. It is needless to say that the expression used for the mode input function 2200 is not only clearly defined by numerical values, but also a fuzzy expression such as a little large or quite small.

Next, the control function 3000 will be described with reference to FIG. The control function 3000 includes a constraint condition creation function 3100, an operation status grasping function 3200, an optimization calculation function 3300, and a rationality check function 3400. Sent to The constraint creation function 3
In step 100, upon receiving the manipulated variable set value 20 output from the mode setting function 2000, a constraint condition signal 31 which is a necessary condition for achieving the set value 20 is created. On the other hand, the operation status grasping function 3200 periodically refers to the database 1000 in which the history of the operation status is stored, so that the operation status, the margin ratio, and the A list of operable devices is made, and an operation state signal 32 of each heat source device at that time is calculated by an optimization calculation function 33.
Send to 00. The optimization function 3300 receives the constraint condition signal 31 and the operating state signal 32 and receives the constraint condition signal 3
The operation load rate signal 33 of the heat source equipment which minimizes the objective function within the margin rate of each heat source equipment while satisfying 1 is sent to the rationality check function 3400.

The rationality check function 3400 receives the operation load ratio signal 33 and receives
The device characteristics of each heat source device are searched from the device characteristic database in the inside, and it is examined whether or not the operation at the load factor given by the operation load factor signal 33 can be achieved within the corresponding time.
If the operation at the load factor given by the operation load factor signal 33 is not possible, the upper limit or the lower limit of the achievable load factor is used as the rationality check signal 34 as the constraint condition creation function. Send to 3100.

In response to the rationality check signal 34, the constraint creation function 3100 creates a constraint corresponding to the rationality check signal 34 while referring to the database 1000, and optimizes the constraint as the new constraint signal 31. To the conversion calculation function 3300. Hereinafter, the optimization calculation function 330
The operation from 0 is as described above. If the operation at the load factor can be achieved, the operation load factor signal 33 is used as the rationality check signal 34 as the heat source equipment plant 4000.
Send to It goes without saying that the optimization method used in the optimization computer 3300 can be not only a mathematical programming method such as linear programming or dynamic programming but also an AI method.

An example of the heat source equipment plant 4000 will be described based on the example of the plant configuration shown in FIG. The heat source equipment plant 4000 includes a power generation device (here, a gas turbine) 4100 which is an energy generation device, a cold heat generation device (here, a gas absorption refrigerator) 4200, and a hot heat generation device (here, a waste heat recovery boiler) 4300. , A hot water generator (here, an absorption type chiller / heater) 4400, an energy distribution function 4500, a steam header 4600, a cold water storage tank 4
800 and a hot water storage tank 4700. The power generation device 4100, the cold heat generation device 4200, the hot heat generation device 4300, and the hot water generation device 4400 receive the operation load factor of the heat source device included in the rationality check signal 34, and set each heat source to the load factor. The operating state of the equipment is determined, and the power 40 and cold 4 required by the customer
1. Output the hot heat 42 and the hot water 43.

[0024]

As described above, according to the present invention, in an energy system having a heat source equipment plant to which at least two types of primary energy sources are input, an operation in which at least the usage rate of the primary energy is invariable for a certain period. The operation mode is set so that the operator can achieve high-efficiency utilization operation of the energy under the operation mode set by the operator preferentially. It is also possible to operate the energy system smoothly.

[Brief description of the drawings]

FIG. 1 is a basic configuration diagram of the present invention.

FIG. 2 is a detailed configuration diagram of a mode setting function of the present invention.

FIG. 3 is a detailed configuration diagram of a control function.

FIG. 4 is a detailed view of a heat source equipment plant.

[Explanation of symbols]

 1000 Database 2000 Mode setting function 3000 Control function 4000 Heat source equipment plant 2100 Mode setting menu 2200 Mode input function 2300 Mode calculation function 3100 Constraint condition creation function 3200 Operation status grasping function 3300 Optimization calculation function 3400 Rationality check function 4100 Energy generation device 20 Manipulated variable set value 30 Control command 31 Constraint condition signal 32 Operating status signal 33 Operating load ratio signal 34 Rationality check signal

──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Masahiro Yoshioka 5-2-1, Omika-cho, Hitachi City, Ibaraki Prefecture, Ltd. Inside the Omika Plant, Hitachi, Ltd. (58) Field surveyed (Int. Cl. ⁷ , DB name) F24F 11/02

Claims (4)

(57) [Claims] 1. A method of operating an energy system having a heat source equipment plant having at least two types of primary energy sources as inputs, a control means of the heat source equipment plant, and a database of the heat source equipment plant. At least an operation mode in which the usage ratio of the primary energy is invariable for a certain period is set, and the control means of the heat source equipment plant is controlled under the operation mode to change the supply heat energy. , Energy system operation control method. 2. An energy system comprising a heat source equipment plant having at least two types of primary energy sources as inputs, control means for the heat source equipment plant, and a database of the heat source equipment plant, wherein at least the primary Operating mode setting means for setting an operation mode in which the energy usage ratio is not changed for a certain period; and controlling the control means of the heat source equipment plant under the operation mode to supply heat energy. Energy system that can change the energy. 3. An operation mode in which the usage rate of the primary energy is not changed for a predetermined period based on the consumption rate of the primary energy is set.
An operation control method for the energy system according to the above. 4. The energy according to claim 2, further comprising means for setting an operation mode in which the usage rate of the primary energy is unchanged for a predetermined period based on the consumption rate of the primary energy. system.