JP2017028983A - Operation scheduling device for distributed energy system, and operation scheduling method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To calculate an output performance of a virtual creation energy facility including operation efficiency at a partial load time and to reflect integral operation scheduling with the output performance.SOLUTION: An operation scheduling device comprises: demand site EMSs 101 and 102 individually installed on demand sites 1 and 2 including a plurality of distributed energy facilities; and an integral EMS 200 which integrates the demand site EMSs in a high order of hierarchies. The plurality of distributed energy facilities within the demand site EMS are regarded as one virtual creation energy facility. Based on specification information managed by a specification management part and an output performance of the virtual creation energy facility calculated by an output performance calculation part and including operation efficiency at a partial load time or an output performance of the virtual creation energy facility including a change of efficiency caused by a difference of an output ratio of power and heat, an integral operation schedule including an entire operation schedule and an energy transfer schedule of the distributed energy facilities to be an operation combination of the distributed energy facilities satisfying a synthetic demand prediction value created by a demand prediction management part is created.SELECTED DRAWING: Figure 1

Description

  The present invention relates to equipment specifications (equipment for generating power / heat generation, electricity / thermal energy such as power generation / heat generation, etc.) to be created in the operation plan creation of the distributed power supply according to the energy demand. Performance).

  Facilities that make up a distributed energy system include generators (generators, boilers, etc.), accumulators (storage batteries, heat storage tanks, etc.), converters (refrigerators, etc.), natural power sources (sunlight, wind power, etc.) Can be mentioned. Hereinafter, facilities constituting the distributed energy system are referred to as distributed energy facilities. A system for creating an operation plan (including an optimum operation plan) for performing an appropriate output with respect to the energy demand using these distributed energy facilities, that is, an operation plan creation system has conventionally been disclosed in Non-Patent Document 1 and The thing of patent document 1 was proposed.

  An outline of operation plan creation by a conventional operation plan creation system is shown in FIG. In FIG. 10, reference numeral 11 denotes a past equipment operation pattern management unit that manages past operation plans and operation results as equipment operation patterns.

  Reference numeral 12 denotes an equipment specification information management unit that manages specification information such as the output amount and efficiency of each equipment.

  A load amount prediction unit 13 predicts and manages the load amount of each facility.

  14 creates an operation plan for one day so as to satisfy the load amount predicted by the load amount prediction unit 13 based on information such as the past facility operation pattern management unit 11 and the facility specification information management unit 12. An operation plan creation unit that outputs the operation pattern 15.

  At this time, the operation plan for each facility is created in consideration of the consistency with the facility currently in operation.

  The operation plan creation system described here may generally operate as part of an energy management system (hereinafter also referred to as EMS) that performs energy supply and demand control in the demand area. In this specification, the operation plan creation system and the EMS are treated as the same system.

  When the above-mentioned EMS is installed in each of a plurality of demand areas, when a shortage of energy such as electric power in a certain demand area, a system that manages the shortage from other demand areas is disclosed in Patent Document 2, for example. The described ones are proposed.

  In the system shown in Patent Document 2, a plurality of power generation facilities managed by the EMS in each demand area are regarded as one large power generation facility (virtual power source), and an overall operation plan is created by combining these.

“Microgrid power supply optimal operation plan”, Meiden Hourly Bulletin No.314 No. 2007 3, pp. 6-10

JP 2005-130550 A Japanese Patent No. 3824215

  The virtual power supply system as shown in Patent Document 2 has the following problems.

  (1) Only electric power is assumed as energy to be supplied. However, in the energy supply to the demand area, it is necessary to consider heat demand, and it is necessary to consider the balance between power demand and heat demand. In particular, in a demand area having a cogeneration system (generally called a cogeneration system) as a supply facility, the operation of the facility is important in considering the optimum energy supply operation.

  (2) For the virtual power supply equipment specifications, the minimum output / maximum output at time t and the change in output in the up direction / change in output in the down direction are defined as constraints, and the output value of the virtual power supply at time t is the demand It is equal to or less than the total sum of the power supply facilities in the ground, is equal to or greater than the minimum value of the power supply facilities in the demand area, and the output difference between the virtual power supplies at time t-1 and time t is within the change in the increase direction output or change in the decrease direction output. This is a limitation when creating an operation plan.

  However, the facilities that make up the virtual power supply have different rated output values and different partial characteristics (the power generation efficiency may vary greatly depending on the load factor). For example, there are two generators (500 kW) with the same rated output, one with good efficiency during rated operation, but only one with partial load factor (generator (1)), and the other with efficiency during rated operation. Suppose that the efficiency of the partial load factor is good (generator (2)). When an output of 750 kW is obtained, the operation with the generator (1) rated and the generator (2) 250 kW is efficient when efficiency is taken into account, but if only the output value is considered, other combinations are possible There will be no problem.

  The present invention solves the above-mentioned problems, and the purpose thereof is even in the case where facilities having different output forms such as power output facilities, electric heat supply facilities, and heat output facilities coexist in the demand area EMS. Provided is a distributed energy system operation plan creation apparatus and creation method that can obtain the output performance of virtual energy creation facilities including operation efficiency at partial load and reflect this in the creation of the overall operation plan. There is.

The distributed energy system operation plan creation device according to claim 1 for solving the above-mentioned problems is individually installed in each demand area having a plurality of distributed energy facilities which are facilities constituting the distributed energy system. And a general energy management system that supervises each of the demand area energy management systems at a higher rank,
The integrated energy management system
Specification information of distributed energy facilities in each of the demand area energy management systems and a plurality of distributed energy facilities in the demand area energy management system are considered as one virtual energy creation facility. A specification management unit for managing output performance information;
A cost management unit that manages information on energy costs including costs related to energy interchange between the demand areas, public energy purchase costs, and energy creation costs for distributed energy facilities;
A demand forecast management unit that aggregates demand forecast information of all demand areas obtained from each of the demand area energy management systems to create and manage a composite demand forecast value;
In view of energy costs managed by the cost management unit, distributed energy equipment that satisfies the composite demand forecast value created by the demand forecast management unit based on the specification information managed by the specification management unit and the output performance information of the virtual energy creation equipment An overall operation plan creation section that creates an overall operation plan including an overall operation plan and an energy interchange plan for distributed energy facilities,
An operation plan creation device for a distributed energy system comprising:
The specification management unit defines an output range of the facility based on data from a minimum output value to a maximum output value of each distributed energy facility in one virtual energy generation facility, and each of the defined distributed energy facilities It has an output performance calculation part which calculates the output performance of the virtual energy creation equipment including the operation efficiency at the time of partial load based on the output range.

In addition, the operation plan creation device for the distributed energy system according to claim 2 is characterized in that in claim 1,
The output performance calculator is
Dividing between the minimum output value and the maximum output value of each distributed energy facility in one virtual energy creation facility by an arbitrary number of divisions to obtain the output value of each division point, using the output value of the division point, Calculate an output value when operating any one of a plurality of distributed energy facilities alone and each output value when operating a plurality of distributed energy facilities simultaneously, and calculate the output value from each of the calculated output values. Extract the output value for the number of divisions, and output the extracted output value as output performance information of the virtual energy equipment that takes into account partial load.
The specification management unit captures and manages the output performance information of the virtual energy generation facility output from the output performance calculation unit.

According to a fifth aspect of the present invention, there is provided a method for preparing an operation plan for a distributed energy system, wherein the energy of a demand area individually installed in each demand area having a plurality of distributed energy facilities that are facilities constituting the distributed energy system. A distributed energy system operation plan creation method comprising a management system and a general energy management system that supervises each demand area energy management system at a higher level,
The output performance calculation unit of the integrated energy management system regards multiple distributed energy facilities in the demand area energy management system as one virtual energy creation facility, and determines each distributed energy facility in one virtual energy creation facility. The virtual energy creation equipment including the output efficiency of the equipment defined by the data from the minimum output value to the maximum output value, and including the operation efficiency at the time of partial load based on the output range of each of the defined distributed energy equipment An output performance calculation step for calculating the output performance of
The specification management unit of the overall energy management system sets and manages the specification information of the distributed energy facilities in each demand area energy management system, and outputs the output performance information of the virtual energy creation facility calculated in the output performance calculation step. Specification management steps to manage,
Cost management in which the cost management section of the overall energy management system sets and manages information on energy costs including costs related to energy interchange between the above demand areas, public energy purchase costs, and energy creation costs for distributed energy facilities Steps,
A demand forecast management step in which a demand forecast management unit of the overall energy management system collects demand forecast information indicating the forecast load of all demand places from each demand place energy management system, creates a composite demand forecast value, and manages it; ,
Prepared by the Demand Forecast Management Department based on the specification information managed by the Specification Management Department and the output performance information of the virtual energy generation equipment, in consideration of the energy costs managed by the Cost Management Department And a step of creating a comprehensive operation plan including an overall operation plan of the distributed energy facility and an energy interchange plan, which is an operation combination of the distributed energy facility that satisfies the composite composite demand forecast value. .

The operation plan creation method for a distributed energy system according to claim 6 is the method of claim 5,
The output performance calculating step divides between a minimum output value and a maximum output value of each distributed energy facility in one virtual energy creation facility by an arbitrary number of divisions to obtain an output value of each division point, Are used to calculate the output value when one of a plurality of distributed energy facilities is operated independently, and the output value when a plurality of distributed energy facilities are operated simultaneously. Extracting the output value for the number of divisions from each calculated output value, and outputting the extracted output value as output performance information of the virtual energy equipment that takes into account the partial load time,
In the specification management step, the output performance information of the virtual energy generation facility output in the output performance calculation step is taken in and managed.

  According to the above configuration, even when equipment with different output forms such as power output equipment, combined heat and power supply equipment, and heat output equipment are mixed in the demand area energy management system, the operation efficiency at partial load is improved. The output performance of the included virtual energy generation equipment can be obtained and reflected in the creation of the overall operation plan.

  As a result, an operation plan capable of realizing an economical operation taking into account the operation efficiency at the time of partial load is obtained, and the total energy cost can be reduced.

Moreover, the operation plan preparation apparatus of the distributed energy system of Claim 3 has the optimal operation plan preparation function in each said demand area energy management system in Claim 1,
The output performance calculator is
Among the distributed energy facilities in one virtual energy creation facility, the smallest value among the minimum output values of each heat output facility that supplies energy to the heat-related load is set as the minimum output value for the load. The value obtained by adding all the maximum output values of the heat output equipment is set as the maximum output value for the load, and the value obtained by connecting the set minimum output value and the maximum output value with a straight line is the heat output range of the heat output equipment by load. The process to be defined is repeatedly executed for the number of heat loads,
Among the distributed energy facilities in one virtual energy generation facility, the smallest value among the minimum output values of each power supply facility that supplies energy to the load related to electric power is set as the minimum output value. A value obtained by adding all output values is set as the maximum output value, and a value obtained by connecting the set minimum output value and maximum output value with a straight line is defined as the power output range of the power output facility,
For the demand area energy management system, using the optimum operation plan creation function, set the power output amount for the predicted load amount for each arbitrary time zone segment to the defined power output range, and When the heat output amount is set to a constant value, the load factor of each heat load in the demand area energy management system is divided by an arbitrary number of divisions, and the divided load factors are combined with all the heat load items Calculate the cost of the load related to each heat for each power load factor of the power by optimal calculation, create the heat output cost table of the heat output facility for all combinations, and execute the cost table creation process to output,
Obtain the load value of the load for each heat in a specific time zone from the load information to be optimally calculated, obtain the load factor for the output value of each heat output facility, respectively, and calculate the heat output cost table closest to those load factors Is selected from the thermal output cost table created by the cost table creation process, and is repeatedly executed by the number of time zone segments, and the performance represented by the thermal output cost table selected for each time zone segment is Output as performance information of virtual energy creation equipment including changes in efficiency resulting from differences in output ratio of heat and heat,
The specification management unit captures and manages the output performance information of the virtual energy generation facility output from the output performance calculation unit.

Moreover, the operation plan preparation method of the distributed energy system of Claim 7 WHEREIN: Each said demand area energy management system in Claim 5 has an optimal operation plan preparation function,
The output performance calculating step includes:
Among the distributed energy facilities in one virtual energy creation facility, the smallest value among the minimum output values of each heat output facility that supplies energy to the heat-related load is set as the minimum output value for the load. The value obtained by adding all the maximum output values of the heat output equipment is set as the maximum output value for the load, and the value obtained by connecting the set minimum output value and the maximum output value with a straight line is the heat output range of the heat output equipment by load. Repeatedly executing the process to be defined by the number of heat loads;
Among the distributed energy facilities in one virtual energy generation facility, the smallest value among the minimum output values of each power supply facility that supplies energy to the load related to electric power is set as the minimum output value. A value obtained by adding all output values is set as a maximum output value, and a value obtained by connecting the set minimum output value and maximum output value with a straight line is defined as a power output range of the power output facility,
For the demand area energy management system, using the optimum operation plan creation function, set the power output amount for the predicted load amount for each arbitrary time zone segment to the defined power output range, and When the heat output amount is set to a constant value, the load factor of each heat load in the demand area energy management system is divided by an arbitrary number of divisions, and the divided load factors are combined with all the heat load items Calculating the cost of the load related to each heat for each power load factor by optimal calculation, creating a heat output cost table of the heat output facility for all combinations, and executing a cost table creation process for outputting,
Obtain the load value of the load for each heat in a specific time zone from the load information to be optimally calculated, obtain the load factor for the output value of each heat output facility, respectively, and calculate the heat output cost table closest to those load factors Is selected from the thermal output cost table created by the cost table creation process, and is repeatedly executed by the number of time zone segments, and the performance represented by the thermal output cost table selected for each time zone segment is And outputting as output performance information of virtual energy creation equipment including a change in efficiency resulting from a difference in the output ratio of heat and
In the specification management step, the output performance information of the virtual energy generation facility output in the output performance calculation step is taken in and managed.

  According to the above configuration, even in the case where facilities with different output forms such as power output facilities, combined heat and power facilities, and heat output facilities are mixed in the demand area energy management system, the output ratio of power and heat The output performance of the virtual energy generation equipment including the change in efficiency resulting from the difference is obtained, and this can be reflected in the creation of the overall operation plan.

  As a result, an operation plan capable of realizing an economical operation in consideration of a change in efficiency resulting from a difference in output ratio between electric power and heat can be obtained, and a total energy cost can be reduced.

  According to a fourth aspect of the present invention, there is provided a distributed energy system operation plan creation device according to any one of the first to third aspects, wherein the output performance calculation unit calculates the auxiliary machine from the rated output of each distributed energy facility. The amount of power obtained by subtracting the power consumption and / or the power consumption of the distributed energy facility is handled as the output of the distributed energy facility.

  An operation plan creation method for a distributed energy system according to an eighth aspect of the present invention is the method according to any one of the fifth to seventh aspects, wherein the output performance calculating step is performed based on a rated output of each distributed energy facility. It has the step which calculates | requires the output of a distributed energy equipment by subtracting the power consumption and / or the power consumption of a distributed energy equipment.

  According to the above configuration, an overall operation plan that takes into account the power consumption of auxiliary equipment of distributed energy facilities is created, so the overall operation plan created by the overall operation plan creation unit and the overall operation plan are It is possible to reduce an error between individual operation plans developed in the management system.

(1) According to the invention described in claims 1 to 8, it is a case where facilities with different output forms such as power output facilities, combined heat and power facilities, and heat output facilities are mixed in the demand area energy management system. However, the output performance of the virtual energy generation equipment including the operation efficiency at the time of partial load can be obtained, and this can be reflected in the creation of the overall operation plan.

As a result, an operation plan capable of realizing an economical operation taking into account the operation efficiency at the time of partial load is obtained, and the total energy cost can be reduced.
(2) According to the invention described in claims 3 and 7, it is a case where facilities of different output forms such as power output facilities, electric heat supply facilities, and heat output facilities coexist in the demand area energy management system. However, the output performance of the virtual energy generation equipment including the change in efficiency resulting from the difference in the output ratio between power and heat can be obtained, and this can be reflected in the creation of the overall operation plan.

As a result, an operation plan capable of realizing an economical operation in consideration of a change in efficiency resulting from a difference in output ratio between electric power and heat can be obtained, and a total energy cost can be reduced.
(3) According to the inventions described in claims 4 and 8, since the overall operation plan taking into account the auxiliary machine power consumption of the distributed energy facility is created, the overall operation plan created by the overall operation plan creation unit and In addition, it is possible to reduce an error between the overall operation plan and the individual operation plan established by developing it in each demand area energy management system.

The whole block diagram which shows the embodiment of this invention. The block diagram which shows the principal part structure of the embodiment of this invention. The graph which shows an example of the output characteristic which can be covered with the virtual creation energy equipment in Example 1 of this invention. The graph which shows an example of the output range of the heat output equipment in the demand place in Example 2 of this invention. The graph which shows an example of the output range of the power output equipment in the demand place in Example 2 of this invention. The graph which shows the example of a setting to the optimal operation plan creation function of the demand place EMS in Example 2 of this invention. Explanatory drawing which shows an example of the cost table classified by heat output equipment load factor in Example 2 of this invention. The graph which shows an example of the energy demand information (load information) of the demand place used as the execution object of optimization calculation in Example 2 of this invention. Explanatory drawing showing the mode of the output assumption of a distributed power supply in Example 3 of this invention. The block diagram explaining the flow of the operation plan preparation in the conventional distributed energy system.

Hereinafter, embodiments of the present invention will be described with reference to the drawings, but the present invention is not limited to the following embodiments. In this embodiment, as shown in FIG. 1, an integrated energy management system (hereinafter referred to as overall management) that manages the demand area energy management system (hereinafter referred to as demand area EMS) individually installed in a plurality of demand areas. EMS)
To create multiple energy generation facilities (distributed energy facilities) in the demand area EMS as virtual energy facilities that are assumed to be one energy creation facility, and to efficiently create an energy supply and demand plan for the entire demand area The calculation method of the specifications of virtual energy creation equipment was defined.

  In FIG. 1, demand areas EMS 101 and 102 for performing energy supply and demand control in each demand area are individually installed in the demand areas 1 and 2. DER 1 to 3 indicate distributed energy resources among the distributed energy facilities existing in each of the demand areas 1 and 2.

  A plurality of distributed energies in the demand area EMS101 are regarded as one virtual energy creation facility (1), and a plurality of distributed energies in the demand area EMS102 are regarded as one virtual energy creation facility (2). Yes.

  Reference numeral 200 denotes a general EMS that supervises the demand areas EMS 101 and 102 at a higher level. The overall EMS 200 and the demand areas EMS 101 and 102 are connected by a network, and various information is exchanged. The number of the plurality of demand areas EMS is not limited to two. The demand areas EMS 101 and 102 each have a function of executing the following processing, for example.

  (1) A function for managing the specification information of the distributed energy facility in the demand area. This includes a case where the specification information of the distributed power sources DER1 to DER3 is individually managed and a case where one demand place is regarded as a virtual power plant (hereinafter referred to as VPP) and managed. Note that VPP is a system that controls and manages a plurality of distributed power sources collectively through a communication network regardless of whether they are used or not.

  (2) When the optimum operation plan creation function described in Non-Patent Document 1 and Patent Document 1 is provided and one demand area is regarded as a VPP, an operation plan in the demand area is created using the optimum operation plan creation function Then, VPP specification information is created and managed based on the created operation plan.

  (3) A function of managing energy costs such as energy creation costs of distributed energy facilities and public energy charges (electricity charges, gas charges, etc.).

  (4) A function of managing demand forecast information (predicted load information) indicating the forecast load of the demand area.

  (5) A function of executing the operation of the distributed energy facility based on the operation plan created and notified by the overall operation plan creation unit described later of the overall EMS 200.

  The functional blocks of the overall EMS 200 are shown in FIG.

  In FIG. 2, reference numeral 201 denotes a DER specification management unit (specification management unit) that manages the specification information of the distributed energy facilities managed by the demand areas EMS 101 and 102. The management of the specification information may be any of managing the distributed power sources (DER1 to DER3) in the demand areas individually or managing one demand area as VPP.

  In addition, the specification information is set in advance in a static setting set in the DER specification management unit 201 of the overall EMS 200, or is dynamically collected from the demand areas EMS 101 and 102 when the overall EMS 200 is operated, and the DER specification management unit 201 is collected. Any setting method of dynamic setting to be set may be used.

  In the DER specification management unit 201, a plurality of distributed energy facilities in the demand areas EMS 101 and 102 are regarded as one virtual energy creation facility (virtual energy creation facilities (1) and (2) in FIG. 1). An output performance calculation unit 211 that calculates output performance information of the virtual energy creation equipment at the time is provided, and the DER specification management unit 201 also manages this output performance information.

  The output performance calculation unit 211 defines the output range of the facility by data from the minimum output value to the maximum output value of each distributed energy facility in one virtual energy creation facility, and each of the defined distributed energy facilities On the basis of the output range, the processing described later is performed to calculate the output performance of the virtual energy generation facility including the operation efficiency at the partial load.

  202 is a cost related to energy creation (energy cost) such as costs related to energy interchange between each demand area, public energy charges (costs for purchasing public energy such as power charges and gas charges), and energy creation costs for distributed energy facilities. This is a cost management unit that manages the information).

  The cost setting related to the energy creation including the energy accommodation cost is either static setting set in advance in the cost management unit 202 of the overall EMS 200, or is dynamically collected from each demand area EMS 101, 102, and cost management is performed. Any setting method of dynamic setting set in the unit 202 may be used.

  203 summarizes demand forecast information (predicted load information) in all demand areas managed by each demand area EMS 101, 102, and comprehensive synthetic demand forecast value (synthetic forecast load information) across each demand area 1,2. It is a demand forecast management part which creates and manages.

  204 is a composite demand forecast created by the demand forecast management unit 203 based on the specification information managed by the DER specification management unit 201 and the output performance information of the virtual energy generation equipment in view of the energy cost managed by the cost management unit 202. Create a comprehensive operation plan that includes the overall operation plan and energy interchange plan for distributed energy facilities, which is an operational combination of distributed energy facilities that satisfy the values, and assign a responsible operation plan to each demand area EMS 101, 102 This is the creation department.

  In this allocation, an output plan for each demand area EMS is extracted from the created overall operation plan result, and notified to each demand area EMS 101, 102 together with an energy accommodation plan as an operation plan. Regarding the energy interchange between demand areas, for example, the predicted load indicated by the predicted load information of the site collected from the demand areas EMS 101 and 102 before the overall operation plan is created, and the demand in the overall operation plan after the creation described above. The difference with the output energy indicated by the output plan for the ground is defined as the energy accommodation amount, and the energy accommodation plan is created.

  205 monitors whether the operation based on the operation plan created by the overall operation plan creation unit 204 (according to the operation plan) has been performed. It is a state monitoring unit that instructs the overall operation plan creation unit 204 to recreate a plan.

  The overall EMS 200 is configured by a computer, for example, and includes hardware resources of a normal computer, such as a ROM, a RAM, a CPU, an input device, an output device, a communication interface, a hard disk, a recording medium, and a driving device thereof.

  As a result of the cooperation between the hardware resource and the software resource (OS, application, etc.), the overall EMS 200 includes the DER specification management unit 201, the output performance calculation unit 211, the cost management unit 202, the demand prediction management unit 203, and the overall management. The processing functions of the operation plan creation unit 204 and the state monitoring unit 205 are implemented.

  In the distributed energy system operation plan creation apparatus configured as described above, the overall EMS 200 controls the demand areas EMS 101 and 102 and realizes optimum energy distribution in the entire demand area.

  At that time, the output performance calculation unit 211 calculates the output performance of the virtual energy generation facility including the operation efficiency at the time of partial load as in Examples 1 and 2 below, and controls it in the overall operation plan creation unit 204. This is reflected in the operation plan creation.

  In the first embodiment, for the specifications of the virtual energy generation equipment, the output performance calculation unit 211 is the same as the equipment having the equipment specifications for each electric and heat as in the case of the cogeneration that is the electric heat combined supply equipment. The specifications are calculated as follows for each heat using the same method.

  (1) Acquire specification information (e.g., rated value, efficiency for each load factor, fuel consumption, etc.) related to multiple energy creation facilities in one demand area from catalogs or performance information (catalog specifications, facility operation results data, etc.) The calculation source data is not limited).

  (2) In order to calculate the output range that can be covered by the total output of each energy creation facility, the minimum output and the maximum output (rated output) of each facility are divided by an arbitrary number of points. For example, assume that there are two power supply facilities, each with a rated output of 785 kW (equipment (1)) and a rated output of 800 kW (equipment (2)), and the minimum output to the maximum output (rated output) divided into 12 Table 1 shows.

  The number of divisions is not limited to 12, and the number of partial load factor data points can be set arbitrarily.

  (3) All combinations of outputs for each energy of a plurality of facilities in one demand area are calculated. Since the output when the equipment (1) or (2) in Table 1 is independently operated and the output combination when the equipment (1) and the equipment (2) are simultaneously operated are calculated, the equipment (1 ) Or (2) in the individual operation, there are 12 ways each, so there are 24 ways, and in the combined operation of facilities (1) and (2), 12 ways × 12 ways = 144 ways, and a total of 168 kinds of output values can be calculated.

  (4) By arranging the output values (168) calculated in the above (3) in ascending order, facilities (1) and (1) that take into account partial load times (electricity / heat output, fuel consumption at that time, etc.) and ( The entire output characteristics (minimum output to maximum output characteristics) that can be covered in 2) are obtained as shown in the virtual energy generation equipment output graph of FIG.

  (5) In this case, since the minimum output to the maximum output (rated output) are divided into 12 divisions, an arbitrary law (for example, from the 168 output values, the minimum value and the maximum value are calculated from the output values arranged in ascending order). If it is divided into 10 equal parts ((168-2) / 10≈17), it will be about 17, so the output value is extracted every 17). Handled as the output characteristics (output performance information) of the energy supply equipment (virtual energy creation equipment) when creating the overall operation plan.

  As described above, according to this embodiment, the following effects can be expected.

  (1) It can be applied regardless of the energy type (electricity, heat) of the energy creation equipment existing in the demand area, and can support the creation of an overall operation plan for all energy types.

  (2) Not only the output range cover but also the specifications as a virtual energy creation facility that takes into account the efficiency of the partial load factor and the energy creation cost (which can be calculated from fuel consumption, etc.) It can be calculated by combination calculation.

  In the first embodiment, individual output value information of a plurality of facilities constituting the virtual energy creation facility is collected, the output value and output value combination calculation of each facility is performed, and the results are arranged in ascending order to create virtual energy creation. Although defined as the output value information of the equipment, the following issues are raised.

  (1) In order to calculate the output range that can be covered by the total output of facilities existing in the demand area, the value obtained by dividing the minimum output, maximum output (rated output) of each facility and the partial output between them by an arbitrary number of points By acquiring and creating a combination of them, the output range of the energy output (power / heat) of the virtual power source configured by the entire facility in the demand area is defined. However, in this method, for example, if there is a cogeneration system (CSG; cogeneration system) in the demand area, the efficiency of this equipment varies greatly depending on the relationship between the power output and the heat output. This makes it difficult to reflect this point on the performance of the virtual power supply.

  (2) If the same energy is output and the output range is the same, but there are two or more facilities with different operating efficiency at partial load and different costs per unit output, the cost per unit is averaged. It is necessary to add processing according to the occasion, such as the need for processing.

  In the second embodiment, in order to solve the above-mentioned problem, an energy output cost table that takes into consideration the cost per unit output is created according to the following procedure for the specifications of the virtual energy equipment, and this is used as the specifications of the virtual energy equipment. Defined.

  In addition, the operation plan creation apparatus of the distributed energy system of the second embodiment has the same configuration as that shown in FIGS. 1 and 2, and is the same as that shown in FIGS. 1 and 2 except for the function of the output performance calculation unit 211 described below. It is configured.

<Step S1>
(1) In a certain demand area, for each heat load (hot water / cold water, etc.), list the heat output equipment that supplies energy to that load (for example, heat load includes hot water, cold water, steam) It shall be).

  (2) The following information is acquired from the demand area EMS regarding the specifications of the equipment included in the equipment list for each load (if there is no demand area EMS, the setting value is set manually).

(2-1) Obtain the minimum output value and maximum output value of each heat source facility (heat output facility) related to the load. (2-2) Among the minimum output values of each heat source facility, select the smallest value for the load. Set to the minimum output value (2-3) Set the total output value of each heat source facility to the maximum output value for the load (3) Minimum output value and maximum output value for each load in (2) above The value obtained by connecting the two points with a straight line is the heat output range of the heat output facility according to the load in the base.

  (4) The processes (1) to (3) are repeated by the number of heat-related loads, and information on the output range of the heat output facility as shown in FIG. 4 is obtained, for example.

<Step S2>
(1) List facilities for supplying energy to loads related to electric power in demand areas.

  (2) The following information is acquired from the demand area EMS regarding the specifications of the equipment included in the equipment list (if the demand area EMS does not exist, the setting value is set by manual input).

(2-1) Obtain the minimum output value and maximum output value of each power supply facility related to the load (2-2) Set the smallest value among the minimum output values of each power supply facility as the minimum output value (2-3 ) Set the maximum output value by adding all the maximum output values of each power supply equipment. (3) The power output equipment at the base is the value obtained by connecting the minimum output value and the maximum output value with a straight line in (2) above. For example, information on the output range of the power output facility as shown in FIG. 5 is obtained.

<Step S3>
(1) Based on the information acquired in step S1 to step S2, the performance calculation is performed using the optimum operation plan creation function of the demand areas EMS101 and 102.

  (2) In the demand area EMS, when the optimum operation plan creation function is executed, each equipment for the predicted load amount for each time zone (divided into 24 points every 60 minutes, 48 points every 30 minutes, etc.) However, here, as an example, the time zone section is assumed to be 10.

  (3) The power output range obtained in step S2 is set for the power load of the demand area EMS.

  (4) For the load related to heat in the demand area EMS, a constant value is set as the heat load for each load and for each rated output rate. Specifically, for example, as shown in FIG. 6, the heat load is set to the demand area EMS as each heat load in which 10% output of hot water, 10% output of cold water, and 10% output of steam continues throughout the day, and the power load when the heat loads are combined. The cost for each rate is calculated by optimal calculation.

  (5) Combination for each load factor of the heat load (10% warm water output, 10% cold water output, 20% steam output, 10% warm water output, 10% cold water output, 30% steam output, 100% hot water output) The cost in 100% cold water output and 100% steam output) is calculated sequentially. There are three loads related to heat: hot water, cold water, and steam. If each load factor is divided into 10 divided 10% sections, the number of combinations is 10 × 10 × 10 = 1000.

  (6) As described in (5) above, the output cost tables to be prepared are 1000 in the case of this example, and the number of basic combinations is prepared. However, it is also possible to create an output cost table by the following method (7).

  (7) When it is difficult to implement the optimum operation plan creation function 1000 times in the demand area EMS, the load factor of each heat related to the optimum operation plan creation function is set to, for example, the minimum (rated 10%), Output cost table of 3 (3x3x3) = 27 combinations (minimum-intermediate and intermediate-maximum are linearly complemented) with 3 divisions (medium (rated 50%), max (rated 100%)) create. This division number can be arbitrarily set.

<Step S4>
(1) Regarding the output cost table exemplified in (6) and (7) of step S3, the output cost table with any of horizontal axis: electric power and vertical axis: heat (hot water / cold water / steam) is the load of the heat output equipment. Three sheets are created for each rate (minimum / intermediate / maximum), for a total of 27 sheets, as shown in FIG. The output performance calculation unit 211 of the overall EMS 200 takes in the data of the heat output cost table.

  (2) The process of applying the output cost table in the integrated EMS 200 is as follows.

    (2-1) Load information to be created when creating an operation plan representing how to operate a virtual energy generation facility having the characteristics represented by the output cost table, for example, to minimize the cost (The value of each heat (hot water, cold water, steam) in a certain time zone section is extracted from the energy demand information (electric power, each heat) of the demand area to be supplied with energy.

    (2-2) First, for example, a treatment for hot water is performed (the order is not particularly defined). Obtain the load factor indicating how much the extracted hot water load value is relative to the hot water output value when the virtual water generation facility's hot water load factor is 100%, and use the hot water output cost table closest to that load factor. Select from 27 output cost tables. Thereby, the target output cost table is narrowed down to 18 sheets.

    (2-3) The cold water output value and the steam output value are processed in the same manner as the warm water output value, and specified in one output cost table.

    (2-4) The performance represented by the specified output cost table is used as the performance of the virtual energy generation facility in the time zone segment at the time of optimal calculation.

    (2-5) The processes (2-1) to (2-4) are repeated by the number of time zone segments.

  Here, a specific example of an application process in the overall EMS 200 for the output cost table will be described with reference to the load information graph of FIG. FIG. 8 shows an example of energy demand information (load information) of a demand area where energy is supplied by a virtual energy creation facility (targeted for optimization calculation), the vertical axis is energy amount, and the horizontal axis is time zone classification For example, if every hour, 1 = 1: 00, 2 = 2: 0... Here, the time zone section 6 is taken as an example.

    (2-11) Load information related to hot water is acquired from each energy demand in time zone classification 6.

    (2-12) An output cost table closest to the value of the hot water load amount (for example, an output cost table indicating that when the hot water load amount is close to the minimum value (load factor 10%)) is selected. As a result, the output cost table can be reduced from 27 to 18 sheets.

    (2-13) The same applies to steam and cold water, and it is possible to specify 18 sheets → 9 sheets → one sheet.

    (2-14) The specified one output cost table is used as a performance table of virtual energy creation in the time (in this example, time zone section 6).

    (2-15) The processes (2-11) to (2-14) are repeated by the number of time zone segments.

  (3) The virtual energy generation equipment performance of each base set for each time zone obtained as described above is the virtual energy generation equipment including the change in efficiency resulting from the difference in the output ratio of power and heat. Based on this, the overall EMS 200 executes an efficient overall energy operation plan creation when viewed from the entire demand area.

  As described above, according to this embodiment, the following effects can be expected.

  (1) It can be applied regardless of the energy type (electricity, heat) of the energy creation equipment existing in the demand area, and can support the creation of an overall optimum operation plan for all energy types.

  (2) By using the optimum operation plan creation function adopted in the demand area EMS for calculation of the output specifications, it becomes possible to flexibly cope with the change in the equipment configuration in the demand area.

  (3) Even when facilities with different output forms such as power output facilities, combined heat and power facilities, and heat output facilities are mixed in the demand area, the optimum operation plan creation function of the demand area EMS performs calculations in consideration of these differences. It is possible to create output performance that takes into account changes in efficiency resulting from differences in the output ratio between power and heat.

  In the distributed energy equipment usually installed in the demand area, there are auxiliary machines for operating the equipment. This auxiliary machine also consumes energy (mainly electric power) for its operation. In some cases, the power consumption of the auxiliary equipment may be so large that it cannot be ignored, and this must be taken into account when creating a comprehensive facility operation plan in the demand area.

  Therefore, in the third embodiment, when calculating the specifications of the virtual energy generation equipment, the power consumption of each auxiliary machine or auxiliary machine of the distributed energy equipment in the demand area EMS is considered.

  The operation plan creation apparatus of the distributed energy system according to the third embodiment has the same configuration as that shown in FIGS. 1 and 2, and has the same configuration as that shown in FIGS. Has been.

The output performance calculation unit 211 performs the following functions.
(1) The minimum output value / maximum output value (rated power output) of each of the distributed power sources DER1 to DER3 is acquired from a catalog or performance information.
(2) Obtain the DER auxiliary power consumption value from a catalog or the like.
(3) As for the auxiliary machine power consumption, a certain amount is consumed regardless of the DER output quantity. For example, in the case of the distributed power source DER1, the auxiliary machine power consumption is determined from the minimum output value and the maximum output value as shown in FIG. Subtract minutes.

For example, when there is a distributed power source DER having a minimum output value of 390 kW, a maximum output value of 780 kW, and an auxiliary machine power consumption of 65 kW, the result is as follows.
Minimum output value: 390kW-65kW = 325kW
Maximum output value: 780 kW-65 kW = 715 kW.
(4) The processes (1) to (3) are performed for all the distributed power sources DER that constitute the virtual energy generation facility.
(5) The DER value with the smallest minimum output among all the distributed power sources DER is the minimum output value of the virtual energy generation facility, and the total output value of all the distributed power sources DER is the maximum output value of the virtual energy generation facility. And

In addition to the power consumption of the auxiliary machine, the energy consumed by the operation of the distributed power source DER is also handled as the power consumption of the auxiliary machine like the auxiliary machine power consumption.
(6) After that, it implements according to the specification calculation of the virtual energy equipment described in Example 1 and Example 2. That is, for example, in the case of the first embodiment, the above (1) to (5) are applied in the specification information acquisition of the first embodiment (1). In the second embodiment, the above-described (1) to (5) are applied in the information acquisition of (2) in <Step S2>.

According to the third embodiment, the following effects can be expected.
(1) When the overall operation plan drafted by the overall EMS 200 is expanded to the demand areas EMS 101 and 102 of each demand area, each base will implement a base operation plan for realizing a part of the overall operation plan given to the base. (Individual operation plan) is created. At that time, by taking into account the auxiliary machine power consumption of the distributed power supply DER at each site, it becomes possible to reduce errors in making the overall and individual operation plans.
(2) When energy is consumed in some form by operating the distributed power supply DER in addition to auxiliary power consumption, it can be handled in the same way as auxiliary power consumption. Planning errors can be reduced.

101, 102 ... Demand area EMS
200 ... General EMS
DESCRIPTION OF SYMBOLS 201 ... DER specification management part 202 ... Cost management part 203 ... Demand forecast management part 204 ... Overall operation plan preparation part 205 ... State monitoring part 211 ... Output performance calculation part DER ... Distributed power supply

Claims (8)

Demand area energy management system individually installed in each demand area having a plurality of distributed energy facilities that constitute a distributed energy system, and integrated energy that supervises each of the demand area energy management systems at a higher level With a management system,
The integrated energy management system
Specification information of distributed energy facilities in each of the demand area energy management systems and a plurality of distributed energy facilities in the demand area energy management system are considered as one virtual energy creation facility. A specification management unit for managing output performance information;
A cost management unit that manages information on energy costs including costs related to energy interchange between the demand areas, public energy purchase costs, and energy creation costs for distributed energy facilities;
A demand forecast management unit that aggregates demand forecast information of all demand areas obtained from each of the demand area energy management systems to create and manage a composite demand forecast value;
In view of energy costs managed by the cost management unit, distributed energy equipment that satisfies the composite demand forecast value created by the demand forecast management unit based on the specification information managed by the specification management unit and the output performance information of the virtual energy creation equipment An overall operation plan creation section that creates an overall operation plan including an overall operation plan and an energy interchange plan for distributed energy facilities,
An operation plan creation device for a distributed energy system comprising:
The specification management unit defines an output range of the facility based on data from a minimum output value to a maximum output value of each distributed energy facility in one virtual energy generation facility, and each of the defined distributed energy facilities An operation plan creation apparatus for a distributed energy system, comprising: an output performance calculation unit that calculates an output performance of the virtual energy creation facility including an operation efficiency at a partial load based on an output range. The output performance calculator is
Dividing between the minimum output value and the maximum output value of each distributed energy facility in one virtual energy creation facility by an arbitrary number of divisions to obtain the output value of each division point, using the output value of the division point, Calculate an output value when operating any one of a plurality of distributed energy facilities alone and each output value when operating a plurality of distributed energy facilities simultaneously, and calculate the output value from each of the calculated output values. Extract the output value for the number of divisions, and output the extracted output value as output performance information of the virtual energy equipment that takes into account partial load.
2. The operation plan creation apparatus for a distributed energy system according to claim 1, wherein the specification management unit takes in and manages the output performance information of the virtual energy generation facility output from the output performance calculation unit. Each demand area energy management system has an optimum operation plan creation function,
The output performance calculator is
Among the distributed energy facilities in one virtual energy creation facility, the smallest value among the minimum output values of each heat output facility that supplies energy to the heat-related load is set as the minimum output value for the load. The value obtained by adding all the maximum output values of the heat output equipment is set as the maximum output value for the load, and the value obtained by connecting the set minimum output value and the maximum output value with a straight line is the heat output range of the heat output equipment by load. The process to be defined is repeatedly executed for the number of heat loads,
Among the distributed energy facilities in one virtual energy generation facility, the smallest value among the minimum output values of each power supply facility that supplies energy to the load related to electric power is set as the minimum output value. A value obtained by adding all output values is set as the maximum output value, and a value obtained by connecting the set minimum output value and maximum output value with a straight line is defined as the power output range of the power output facility,
For the demand area energy management system, using the optimum operation plan creation function, set the power output amount for the predicted load amount for each arbitrary time zone segment to the defined power output range, and When the heat output amount is set to a constant value, the load factor of each heat load in the demand area energy management system is divided by an arbitrary number of divisions, and the divided load factors are combined with all the heat load items Calculate the cost of the load related to each heat for each power load factor of the power by optimal calculation, create the heat output cost table of the heat output facility for all combinations, and execute the cost table creation process to output,
Obtain the load value of the load for each heat in a specific time zone from the load information to be optimally calculated, obtain the load factor for the output value of each heat output facility, respectively, and calculate the heat output cost table closest to those load factors Is selected from the thermal output cost table created by the cost table creation process, and is repeatedly executed by the number of time zone segments, and the performance represented by the thermal output cost table selected for each time zone segment is Output as performance information of virtual energy creation equipment including changes in efficiency resulting from differences in output ratio of heat and heat,
2. The operation plan creation apparatus for a distributed energy system according to claim 1, wherein the specification management unit takes in and manages the output performance information of the virtual energy generation facility output from the output performance calculation unit.   The output performance calculation unit handles, as the output of the distributed energy facility, an amount of power obtained by subtracting the power consumption of auxiliary equipment and / or the power consumption of the distributed energy facility from the rated output of each distributed energy facility. The operation plan creation device for a distributed energy system according to any one of claims 1 to 3. Demand area energy management system individually installed in each demand area having a plurality of distributed energy facilities that constitute a distributed energy system, and integrated energy that supervises each of the demand area energy management systems at a higher level A method for creating an operation plan of a distributed energy system comprising a management system,
The output performance calculation unit of the integrated energy management system regards multiple distributed energy facilities in the demand area energy management system as one virtual energy creation facility, and determines each distributed energy facility in one virtual energy creation facility. The virtual energy creation equipment including the output efficiency of the equipment defined by the data from the minimum output value to the maximum output value, and including the operation efficiency at the time of partial load based on the output range of each of the defined distributed energy equipment An output performance calculation step for calculating the output performance of
The specification management unit of the overall energy management system sets and manages the specification information of the distributed energy facilities in each demand area energy management system, and outputs the output performance information of the virtual energy creation facility calculated in the output performance calculation step. Specification management steps to manage,
Cost management in which the cost management section of the overall energy management system sets and manages information on energy costs including costs related to energy interchange between the above demand areas, public energy purchase costs, and energy creation costs for distributed energy facilities Steps,
A demand forecast management step in which a demand forecast management unit of the overall energy management system collects demand forecast information indicating the forecast load of all demand places from each demand place energy management system, creates a composite demand forecast value, and manages it; ,
Prepared by the Demand Forecast Management Department based on the specification information managed by the Specification Management Department and the output performance information of the virtual energy generation equipment, in consideration of the energy costs managed by the Cost Management Department Creating an overall operation plan including an overall operation plan and an energy interchange plan of the distributed energy facility, which is an operation combination of the distributed energy facility satisfying the composite demand forecast value,
A method for preparing an operation plan for a distributed energy system, comprising: The output performance calculating step divides between a minimum output value and a maximum output value of each distributed energy facility in one virtual energy creation facility by an arbitrary number of divisions to obtain an output value of each division point, Are used to calculate the output value when one of a plurality of distributed energy facilities is operated independently, and the output value when a plurality of distributed energy facilities are operated simultaneously. Extracting the output value for the number of divisions from each calculated output value, and outputting the extracted output value as output performance information of the virtual energy equipment that takes into account the partial load time,
6. The operation plan creation method for a distributed energy system according to claim 5, wherein the specification management step takes in and manages output performance information of the virtual energy generation facility output in the output performance calculation step. Each demand area energy management system has an optimum operation plan creation function,
The output performance calculating step includes:
Among the distributed energy facilities in one virtual energy creation facility, the smallest value among the minimum output values of each heat output facility that supplies energy to the heat-related load is set as the minimum output value for the load. The value obtained by adding all the maximum output values of the heat output equipment is set as the maximum output value for the load, and the value obtained by connecting the set minimum output value and the maximum output value with a straight line is the heat output range of the heat output equipment by load. Repeatedly executing the process to be defined by the number of heat loads;
Among the distributed energy facilities in one virtual energy generation facility, the smallest value among the minimum output values of each power supply facility that supplies energy to the load related to electric power is set as the minimum output value. A value obtained by adding all output values is set as a maximum output value, and a value obtained by connecting the set minimum output value and maximum output value with a straight line is defined as a power output range of the power output facility,
For the demand area energy management system, using the optimum operation plan creation function, set the power output amount for the predicted load amount for each arbitrary time zone segment to the defined power output range, and When the heat output amount is set to a constant value, the load factor of each heat load in the demand area energy management system is divided by an arbitrary number of divisions, and the divided load factors are combined with all the heat load items Calculating the cost of the load related to each heat for each power load factor by optimal calculation, creating a heat output cost table of the heat output facility for all combinations, and executing a cost table creation process for outputting,
Obtain the load value of the load for each heat in a specific time zone from the load information to be optimally calculated, obtain the load factor for the output value of each heat output facility, respectively, and calculate the heat output cost table closest to those load factors Is selected from the thermal output cost table created by the cost table creation process, and is repeatedly executed by the number of time zone segments, and the performance represented by the thermal output cost table selected for each time zone segment is And outputting as output performance information of virtual energy creation equipment including a change in efficiency resulting from a difference in the output ratio of heat and
6. The operation plan creation method for a distributed energy system according to claim 5, wherein the specification management step takes in and manages output performance information of the virtual energy generation facility output in the output performance calculation step.   The output performance calculating step includes a step of subtracting auxiliary machine power consumption and / or power consumption of the distributed energy equipment from a rated output of each distributed energy equipment to obtain an output of the distributed energy equipment. The operation plan creation method for a distributed energy system according to any one of claims 5 to 7.

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