JP2018081336A - Resource management system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To manage resources such as energy without exchanging factory production plans.SOLUTION: Based on an upper limit value of supply resources preset as a supply material frame for a plurality of demand units concerning resources and on an expected demand amount of resources in a predetermined period acquired from the plurality of demand units, availability of supplies for the expected demand amount of resources is judged, and supply-information on resources on supply of the resources is notified to each demand unit.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a material management system.

  Patent Document 1 below discloses an energy management system that realizes more efficient energy management in the entire factory. This energy management system includes a factory energy management system for managing the energy of the factory, a production management system for creating a production plan for the factory, a storage battery system that can supply power to the factory, and a solar power generation system. The factory energy management system predicts the energy load of the factory in cooperation with the production plan of the production management system and also predicts the power that can be supplied from the storage battery system. The factory energy management system then includes a peak cut or a level to make more efficient energy management by leveling the predicted factory load, including the supply from the power that can be supplied by the prediction, with respect to the production plan information. Make adjustments including peak shift. The factory energy management system outputs the adjusted production plan information to the production management system.

JP 2014-059881 A

  By the way, in the energy management system described above, the factory production plan prepared by the production management system is provided to the factory energy management system, and the factory energy management system performs production so as to equalize the factory load based on the factory production plan. Adjust (correct) the plan and provide it to the production management system. That is, the energy management system is a system based on the premise that a factory production plan is provided to the factory energy management system.

  However, the factory production plan is extremely important information for the business operators (enterprises, etc.) that manage and operate the factory. If the factory energy management system is managed and operated by other business operators, it is provided to the factory energy management system. Difficult to do. For example, when performing energy management by peak cut or peak shift for multiple factories with different operators such as industrial parks, the production plan for each factory is provided to a factory energy management system managed and operated by an operator different from each factory. That is not realistic.

  The present invention has been made in view of the above-described circumstances, and an object thereof is to manage materials such as energy without exchanging a production plan of a factory.

  In order to achieve the above object, in the present invention, as a first solving means related to a material supply management system, an upper limit value of a supply material preset as a supply material frame for a plurality of demand units related to the material and a plurality of Based on the forecasted demand for goods in a predetermined period acquired from the demand unit, a means for determining whether or not the goods supply for the forecasted goods demand is possible and notifying the demand unit of the goods supply information related to the goods supply adopt.

  In the present invention, as the second solution means related to the material supply management system, in the first solution means described above, an individual material supply facility linked to the supply system of the material supply company is provided, and the material supply information is A means is adopted that includes whether or not the supply of the goods with respect to the predicted supply demand is possible and the supplyable quantity of goods that can be supplied by using the individual supply equipment.

  In the present invention, as a third solution means related to the material supply management system, in the second solution means, whether or not the supply of the goods with respect to the predicted material demand amount is determined, the time average of the predicted material demand amount and the supply material frame. The method of judging based on the comparison with is adopted.

  In the present invention, as a fourth solution means related to the material supply management system, in the second solution means, whether or not the supply of the goods with respect to the predicted goods demand amount is determined by comparing the time average of the predicted goods demand amount and the standard deviation. A means of determining based on a comparison between the added value and the supply material frame is adopted.

  In the present invention, as a fifth solution means related to the material supply management system, in any one of the second to fourth solution means, the material supply information further includes penalty information related to the suppliable material amount. Adopt means.

  In the present invention, as a sixth solving means related to the material supply management system, in any one of the first to fifth solving means, the supply material frame has a demand unit between the supply supplier and the supply unit. A means is adopted in which the upper limit value of demand goods determined in advance as the amount of contract goods is adopted.

  In the present invention, as a seventh solving means relating to the material supply management system, in the first to sixth solving means, a means that the material is electric power is adopted.

  In the present invention, as the solution means related to the material management system, the material supply management system according to any one of the above first to seventh solution means, and the demand amount of the material in a predetermined period are provided for each of the demand units. A means is provided that includes a plurality of demand amount prediction devices that predict material demand amounts.

  According to the present invention, material management can be performed without exchanging a production plan of a factory.

It is a block diagram showing the whole power supply management center E and power management system A composition concerning one embodiment of the present invention. It is a flowchart which shows operation | movement of the power supply management center E and the power management system A which concern on one Embodiment of this invention. It is a 1st characteristic view which shows the performance of the power supply management center E and the power management system A which concern on one Embodiment of this invention. It is a 2nd characteristic view which shows the performance of the power supply management center E and the power management system A which concern on one Embodiment of this invention. It is a block diagram which shows the whole structure of the gas supply management center Ea and gas management system Aa which concern on the modification of one Embodiment of this invention.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
The power supply management center E according to the present embodiment corresponds to the material supply management system according to the present invention, and the power management system A according to the present embodiment corresponds to the material management system according to the present invention. The “material” in the present invention is a concept in which a predetermined demand unit is supplied from the outside and includes various kinds of energy, water, air, and the like.

  As shown in FIG. 1, the power supply management center E according to the present embodiment manages an industrial estate composed of a plurality of factories F1 to Fn (n: natural number) as the demand unit, and is a form of the above supplies. The supply of a certain electric power to each factory F1-Fn is managed. Below, each factory F1-Fn of the industrial estate which is the management object of such an electric power supply management center E is demonstrated previously.

  Each factory F1-Fn exists in one industrial park, for example, and a different company (company) manages and operates each. In such factories F1 to Fn, products are manufactured based on a production plan created in advance by a company. That is, the products manufactured by the factories F1 to Fn have various manufacturing conditions such as the delivery time and the number of deliveries promised by the company to the delivery destination, and the production plan satisfies such manufacturing conditions. Created as

  Such factories F1 to Fn correspond to demand units in the present invention, and are power demand units for external power supply companies (material supply companies). Further, such factories F1 to Fn include operation plan creation devices b1 to bn in addition to the manufacturing facilities a1 to an. That is, the manufacturing facility a1 and the operation plan creation device b1 are provided in the factory F1, the manufacturing facility a2 and the operation plan creation device b2 are provided in the factory F2, (omitted), and the manufacturing equipment an And the operation plan preparation apparatus bn is provided.

  Each of the manufacturing facilities a1 to an is a facility for manufacturing a desired number of desired products by operating based on a daily operation plan set in advance by the operation plan creation devices b1 to bn. Each of the manufacturing facilities a1 to an includes a plurality of devices that operate using electric power as a power source, such as various machine tools and electric motors, and manufactures products by receiving supply of electric power from the outside. The amount of power demand in such manufacturing facilities a1 to an is determined according to the operation plan, and since the operating states of a plurality of devices change with time, they vary with time even during the day.

  Each of the operation plan creation devices b1 to bn is a device for setting a daily operation plan for each of the manufacturing facilities a1 to an so as to satisfy the production plan described above, and is provided for each factory F1 to Fn (for each demand unit). ing. That is, these operation plan creation devices b1 to bn plan an operation plan for each manufacturing facility a1 to an over a predetermined period (planning period) prior to the actual operation of each manufacturing facility a1 to an. In addition, these operation plan creation devices b1 to bn use the predicted power demand (predicted material demand) for the power demand (material demand) during the planning period assumed when each of the manufacturing facilities a1 to an operates according to the above operation plan. It is also a demand amount forecasting device that calculates as (quantity).

  For example, each of the operation plan creation devices b1 to bn uses the most important production condition among various production conditions that constrain the production plan as a premise of the operation plan as an objective function, and uses other production conditions as a constraint function. By solving the optimization problem (operation plan optimization problem) on a computer, an operation plan in each of the manufacturing facilities a1 to an is set. Each of the operation plan creation devices b1 to bn transmits (provides) the predicted power demand amount during the planning period based on the operation plan set in this way to the power supply management device 1 of the power supply management center E.

  In addition, each such operation plan preparation apparatus b1-bn is implement | achieved by the computer provided with the communication function. That is, each operation plan creation apparatus b1-bn is comprised combining the hardware component and the software component. The software component is an operation plan creation program.

  The hardware components include a ROM (Read Only Memory) that stores a program for creating an operation plan, a CPU (Central Processing Unit) that performs information processing based on the program for creating an operation plan, and a processing result of the CPU temporarily. RAM (Random Access Memory) to be stored, interface circuit for CPU to communicate with the outside, display device for displaying processing result of CPU, operation device for inputting operation instructions of factory manager to CPU, ROM, A CPU, a RAM, an interface circuit, a display device, and a bus line for electrically connecting the operation devices.

  On the other hand, the power supply management center E pre-determines the upper limit of supplied power (supplied supplies) as a contracted power amount (contracted supplies amount) through a contract with a power supply company. Receives power supply from a power supplier. In addition, the power supply management center E sets a supply power frame that is a distribution of the contracted power amount to the factories F1 to Fn. That is, the power supply management center E functions as a power supply intermediary facility that distributes the power supplied from the power supplier within the contracted power amount to the factories F1 to Fn according to the supply power frame. The supply power frame corresponds to the supply material frame in the present invention.

  Such a power supply management center E includes a power supply management device 1, a private power generation device 2, a solar power generation device 3, and a power storage device 4. The power supply management device 1 uses the predicted power based on the supply power frame (supply material frame) stored in advance and the predicted power demand (predicted material demand) received (acquired) from each factory F1 to Fn. The power supply information (material supply information) regarding the power supply is determined to determine whether or not the power supply (material supply) can be made with respect to the demand amount, and the operation plan creation devices b1 to bn of the factories F1 to Fn that are power demand units are notified. . In addition, the said power supply frame is memorize | stored in the power supply management apparatus 1 for every factory F1-Fn, and is the upper limit of the power supply with respect to each factory F1-Fn.

  For example, the power supply management device 1 has an optimization problem (power supply optimization) consisting of several constraint conditions (constraint function) and an objective function that maximizes the amount of power (power supply amount) supplied to each factory F1 to Fn. The power supply amount that can be supplied to each factory F1 to Fn is determined by solving the computerization problem) on the computer. In addition, as said constraint conditions, Condition 1: Each factory F1-Fn can use the said power supply frame freely at arbitrary time, Condition 2: The peak electric power of the sum total of the demand power regarding all factories F1-Fn. It may be less than a predetermined value.

As an objective function in the power supply optimization problem, for example, a function fa shown in the following equation (1) is conceivable. In this function fa, “k” is a discrete time at an appropriate time interval, “k ₀ ” is a schedule start time, “K” is a length of a planning period, and “p _demand (k)” is a power demand at time k. The amount (kW), “p _supply (k)” is the power supply amount (kW) at time k. Further, instead of such a function fa, a function fb shown in Expression (2) or a function fc shown in Expression (3) may be adopted.

  The power supply information is generated based on the power supply amount determined in this way. For example, whether power supply is possible with respect to the predicted power demand amount of each factory F1 to Fn, supply to each factory F1 to Fn. It includes the amount of power that can be supplied (amount of supplies that can be supplied) and penalty information related to the amount of supplies that can be supplied. This penalty information is information indicating whether or not a penalty such as an additional fee is incurred when the supplyable power capacity is supplied.

  Moreover, although mentioned later for details, the electric power supply management apparatus 1 operates the separate electric power supply equipment (individual material supply equipment) which consists of the private electric power generation apparatus 2, the solar power generation device 3, and the electrical storage apparatus 4 as needed. Thus, the supply amount of electric power that can be supplied to each factory F1 to Fn (demand unit) is increased. That is, power is mainly supplied to each factory F1 to Fn (demand unit) via the power system D (supply system), but the power supply management device 1 controls the power supply by controlling individual power supply facilities. It manages the supply of the individual power amount (individual material amount) added to the power amount of the system D (system power amount).

  In addition, such a power supply management apparatus 1 is implement | achieved by the computer provided with the communication function similarly to the operation plan preparation apparatuses b1-bn mentioned above. That is, the power supply management device 1 is configured by combining hardware components and software components. The software components are an information generation program for generating power supply information based on the predicted power demand and a facility control program for controlling individual power supply facilities.

  The hardware components include a ROM that stores the information generation program and the equipment control program, a CPU that performs information processing based on the information generation program and the equipment control program, a RAM that stores the processing results of the CPU, and a CPU Interface circuit for communicating with the outside, a display device for displaying the processing result of the CPU, an operation device for inputting operation instructions of the center manager to the CPU, the ROM, CPU, RAM, interface circuit, display device, and operation Such as a bus line that electrically interconnects the devices.

  The private power generator 2 is linked to the power system D, and generates electric power (self-generated power) by driving a generator with an engine (internal combustion engine). The solar power generation device 3 is also linked to the power system D, and generates electric power (photoelectric power) by converting sunlight (solar energy) into electric power (electric energy) with a semiconductor element (photoelectric element). . The power storage device 4 is also linked to the power system D, and exchanges power (charge / discharge) with the power system D.

  That is, the private power is output from the private power generator 2 to the power grid D, the optical power is output from the solar power generator 3 to the power grid D, and / or the grid power pre-charged by the power storage device 4 is the power grid D. Output to the factories F1 to Fn, it is possible to supply power exceeding the contracted power amount preset for the factories F1 to Fn to the factories F1 to Fn.

  Here, the power supply management center E and the operation plan creation devices b1 to bn of the factories F1 to Fn constitute the power management system A in the present embodiment. This power management system A corresponds to the material management system according to the present invention.

  Next, operations of the power supply management center E and the power management system A according to the present embodiment will be described in detail along the flowchart of FIG.

  First, in each factory F1-Fn, each operation plan preparation apparatus b1-bn produces the operation plan of the manufacturing equipment a1-an in a plan period (step S1), and also the prediction electric power demand of a plan period based on the said operation plan The amount is calculated and transmitted to the power supply management device 1 of the power supply management center E (step S1). In the power supply management center E, the power supply management device 1 receives the predicted power demand from the factories F1 to Fn (step Sa1), and further determines whether the time average of the predicted power demand is equal to or less than the power supply frame. Judgment is made (step Sa2).

  Here, the determination in step Sa2 is performed for each factory F1 to Fn in which the supply power frame is individually set. Since the power supply management device 1 cannot supply power that satisfies the predicted power demand to the operation plan creation device of the factory whose determination in step Sa2 is “No”, the power supply management device 1 notifies the power supply management device 1 Transmit as part of the supply information (step Sa3). The transmission of the supply failure notification based on the comparison between the time average of the predicted power demand and the supply power frame is a measure for preventing a specific factory from monopolizing the available power frame.

  On the other hand, the power supply management device 1 uses the individual power supply facilities (the private power generation device 2, the solar power generation device 3, and the power storage device 4) provided in the power supply management center E for the factory whose determination in step Sa2 is “Yes”. ) To predict the output of the individual power to the power system D (step Sa4). As an example, a case will be described in which the determination at step Sa2 is “Yes” for factories F1 and F2 and the determination at step Sa2 is “No” for other factories F3 to Fn.

  That is, among the private power generation device 2, the solar power generation device 3, and the power storage device 4 constituting the individual power supply facility, the power generation amount of the solar power generation device 3 varies depending on the weather, and the discharge amount of the power storage device 4 is in a charged state. Therefore, the amount of individual power that can be output from the individual power supply facility to the power system D can vary. The power supply management device 1 predicts the amount of individual power during the planning period based on weather forecasts, state of charge, and the like.

  When the process of step Sa4 is completed, the power supply management device 1 creates an operation plan for the individual power supply facility corresponding to the amount of the individual power (step Sa5). When the process of step Sa5 is completed, whether or not the power supply for the predicted power demand is possible and can be supplied to the operation plan creation devices b1 and b2 of the factories F1 and F2 whose determination at step Sa2 is “Yes”. Penalty information is transmitted as part of the power supply information for requesting the amount of power and the demand for power that exceeds the above-described supply power frame (step Sa6).

  On the other hand, the operation plan creation devices b3 to bn of the factories F3 to Fn for which the determination in step Sa2 is “No” receive the supply failure notification as a result of the processing of step Sa3 in the power supply management device 1 (step S3). . In this case, the operation plan creation devices b3 to bn perform the determination process of step S5 following the process of step Sa3. In this case, since the determination in step S5 is “No”, the operation plan creation devices b3 to bn in the factories F3 to Fn redo the creation of the operation plan in step S1.

  In addition, the operation plan creation devices b1 and b2 of the factories F1 and F2 for which the determination in step Sa2 is “Yes” receive the availability of power supply, the suppliable power amount, and penalty information from the power supply management device 1 (steps). S4), it is determined whether or not power supply is a supply enable notification (step S5). When the determination in step S5 is “Yes”, the operation plan creation devices b1 and b2 determine the operation plan created in step S1 (step S6), and the determination in step S5 is “No”. Re-creates the operation plan in step S1.

  According to such this embodiment, since power management is performed by transmitting the predicted power demand in the planning period from each factory F1 to Fn to the power supply management center E, the production created at each factory F1 to Fn. It is possible to realize power management in the power supply management center E without providing the plan to the power supply management center E.

  Moreover, according to this embodiment, the peak shift of the power consumption (demand power) in each factory F1-Fn is realizable. As an example, the simulation results for five factories F1 to F5 will be described below with reference to FIGS. FIG. 3A shows a change in the predicted power demand (kW) in one day, and FIG. 3B shows a change in the suppliable power amount (kW) in one day that has received the optimization result. . FIG. 4 (a) shows the difference (difference power) between the predicted power demand (kW) and the suppliable power amount (kW) received as a result of optimization, and FIG. 4 (b) shows the factory estate. This shows the overall trend in power supply and demand.

  In this simulation, it is assumed that the power supply frame of each factory F1 to F5 is 2000 (kW), and the predicted power demand shown in FIG. 3 (a) exceeds that, but FIG. As shown in Fig. 4 (b), as a result of optimization, supply is achieved after the received power in the entire factory complex is kept below the contracted power by utilizing the solar power generation device 3 and power storage device 4 which are individual power generation. It can be seen that the supply amount can be secured even for the predicted power demand exceeding the power limit.

  As shown in FIG. 4 (a), a part of the suppliable amount does not satisfy the predicted power demand at around 3:00 to 6:30 am, but the shortage is compared with the supply power frame 2000 (kW). Then it is slight. According to this embodiment as described above, it is possible to realize a peak shift in the entire factory complex to be managed by optimally setting the operation plan of the individual power generation facility.

In addition, this invention is not limited to the said embodiment, For example, the following modifications can be considered.
(1) In the above embodiment, the case of managing the supply of electric power, which is one form of goods, to each factory F1 to Fn (demand unit) has been described, but the present invention is not limited to this. As energy (materials) that each factory F1 to Fn receives from the outside, for example, there is gas (city gas) in addition to electric power.

  FIG. 5 shows the gas supply management center Ea and the gas management system Aa when the gas is supplied to the factories F1 to Fn. The gas supply management center Ea includes a gas supply management device 5 and a gas tank 6. In this gas management system Aa, the operation plan creation devices b1 to bn of the factories F1 to Fn transmit the predicted gas demand calculated based on the operation plans of the manufacturing facilities a1 to an to the gas supply management device 5. .

  The gas supply management device 5 basically has the same functional configuration as that of the power supply management device 1, and generates gas supply information based on the predicted gas demand and controls the gas tank 6. The gas tank 6 stores a certain amount of gas received from the gas supply company through the external gas system, and supplies a gas having a gas amount larger than the gas amount received from the external gas system according to the storage capacity to the gas supply line. It has the gas supply capability to supply to each factory F1-Fn via L.

  In this gas management system Aa, the gas supply management device 5 transmits a supply failure notification to the operation plan creation devices b1 to bn as part of the gas supply information when the time average of the predicted gas demand exceeds the supply gas frame. When the time average of the predicted gas demand is less than or equal to the supply gas limit, the amount of gas that can be supplied from the gas tank 6 to each of the factories F1 to Fn is estimated, and supply availability, supplyable gas, and penalty information are operated. It transmits to the plan creation apparatuses b1-bn.

(2) In the above embodiment, when the time average of the predicted power demand (predicted goods demand) is less than or equal to the supply power frame (supply material frame), the availability of supply, the amount of power that can be supplied, and penalty information are operated. Although it transmitted to the plan creation apparatuses b1-bn, this invention is not limited to this. Of the supply availability, supplyable power amount, and penalty information, for example, only the supply availability and supplyable power amount may be transmitted to the shift plan creation devices b1 to bn2.

(3) In the above embodiment, the power supply management center E that manages the industrial park (management target) demand power that is negotiated in advance as the contract power amount (contract material amount) with the power supply business (material supplier) Although it was set as the upper limit of (demand goods), this invention is not limited to this. The power supply information (material supply information) may be generated by setting a management standard (material management standard) other than the contracted power amount (contracted material amount).

(4) In the said embodiment, although the power supply frame was set for every factory F1-Fn, this invention is not limited to this. For example, when each factory F1-Fn is provided with a plurality of production lines, a supply power frame is set for each production line of each factory F1-Fn, and a single operation plan provided in each factory F1-Fn. The production devices b1 to bn may predict the predicted power demand amount of each production line and transmit it to the power supply management device 1. In this case, the power supply management device 1 generates power supply information for each production line of each factory F1 to Fn and transmits it to each operation plan creation device b1 to bn. That is, the demand unit in the present invention is not limited to a factory, and a plurality of production lines provided in the factory may be used.

(5) In the said embodiment, although the time average of the predicted electric power demand amount and the supply power frame were compared in step Sa2, this invention is not limited to this. In this determination method, even if the time average of the predicted power demand is below the supply power frame, optimization through steps Sa4 and Sa5 is performed for a factory where a large power consumption peak occurs at a specific time. As a result, there is a possibility that power cannot be supplied according to the predicted power demand even if the power storage device 4 or the like is used. As a determination method for reducing or eliminating this possibility, it is conceivable to compare the added value of the time average of the predicted power demand and the standard deviation with the supply power frame. The above standard deviation is calculated as a value relating to the time _{k 0 ~k} 0 _{+ K} for example electricity demand p _demand (k).

A Power management system (material management system)
D Power system (supply system)
E Electricity supply management center (material supply management system)
F1-Fn factory (demand unit)
a1-an manufacturing equipment b1-bn2 operation plan creation device (demand amount prediction device)
1 Power supply management device 2 Private power generation device 3 Solar power generation device (individual supplies supply facility)
4 Power storage device (individual supply equipment)
Aa Gas management system (materials management system)
Ea gas supply management center (material supply management system)
L Gas supply line 5 Gas supply management device 6 Gas tank

Claims (8)

  Based on the upper limit of supply supplies preset as supply supply frames for a plurality of demand units related to the supplies and the predicted supply demands for a predetermined period acquired from the plurality of demand units, the supplies for the predicted supply demands A material supply management system that determines whether supply is possible and notifies the demand unit of material supply information related to the material supply. Equipped with individual supply equipment linked to the supply system of the supply company,
2. The material supply management system according to claim 1, wherein the material supply information includes whether or not a material can be supplied with respect to the predicted material demand and a supplyable material amount that can be supplied by using the individual material supply facility.   The material supply management system according to claim 2, wherein the material supply management system determines whether or not the supply of the material for the predicted material demand is based on a comparison between a time average of the predicted material demand and the supply material frame.   The material supply management system according to claim 2, wherein the material supply management system determines whether or not the supply of the material with respect to the predicted material demand is based on a comparison between an added value of a time average of the predicted material demand and a standard deviation and the supply material frame. .   The said material supply information is a material supply management system as described in any one of Claims 2-4 further including the penalty information regarding the said amount of material which can be supplied.   The supply supply management system according to any one of claims 1 to 5, wherein the supply supply frame is an upper limit value of a demand supply, the demand unit of which is determined in advance as a contracted supply amount with a supply supplier.   The material supply management system according to claim 1, wherein the material is electric power. The material supply management system according to any one of claims 1 to 7,
A material management system comprising: a plurality of demand amount prediction devices that are provided for each demand unit and predict the material demand amount in a predetermined period as the predicted material demand amount.

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