JP6781027B2 - Load distribution device and method for thermal power generation system - Google Patents

Description

The present invention relates to a load distribution device and method of a thermal power generation system composed of a plurality of thermal power generation units, and in particular, a load of a thermal power generation system having an operational time constraint when the output is changed depending on the power generation power band of the generator. It relates to a distribution device and a method.

The power supply that was conventionally carried out by the electric power company will be carried by the power generation company and the power transmission and distribution company due to the separation of power transmission and distribution. Power generation companies that have thermal power generation facilities aim to maximize profits by avoiding imbalance, which is the difference between the power generation plan submitted in advance and the actual power generation, and minimizing fuel costs.

Each thermal power generation unit of a thermal power generation system composed of a plurality of thermal power generation units has a time constraint of output change due to securing of auxiliary machine start-up time and suppression of thermal stress of the turbine. Therefore, the power generation company must make a plan for each thermal power generation unit in compliance with the time constraint.

Specifically, the time constraint is a constraint to continue operation for a predetermined time at a constant output near the minimum output or the maximum output of the thermal power generation unit called an exclusion band, and a continuous output change called an interlocking band is possible. It is a minimum operation continuation constraint when performing a band transition of an output range or an exclusion band. Such a time constraint on the transition condition of the output band is called a band constraint.

As an example of a load distribution device in consideration of band constraints, there is one disclosed in Patent Document 1. The device of Patent Document 1 calculates a power generation plan for each unit that minimizes the power generation cost without considering the band constraint of the thermal power generation unit, allocates an output band from the power generation plan for each thermal power generation unit, and violates the band constraint. Develops a power generation plan for each thermal power generation unit that complies with band constraints by correcting the output band to avoid violations.

Japanese Unexamined Patent Publication No. 2009-22137

In the method of Patent Document 1, while the band constraint can be observed, the fuel cost minimization is not guaranteed because the output is corrected from the optimum output allocation for fuel cost minimization. In addition, this method does not provide a means for drafting a power generation plan amendment plan for the entire thermal power generation system that can minimize fuel costs while avoiding band restrictions, or for providing information to assist the amendment plan.

From the above, in the present invention, in view of the above circumstances, based on the given power generation plan for the entire thermal power generation system, the power generation plan for each thermal power generation unit that complies with the above band constraints is calculated, and the band constraint violation is violated. It provides a load distribution device and method for a thermal power generation system provided with a power generation plan amendment that can be avoided or a means for providing information for assisting the amendment.

In order to solve the above problems, in the present invention, "a load distribution device for a thermal power generation plant in which a plurality of thermal power generation units including a generator are configured, and for each thermal power generation unit from a given total power generation plan. Stored in the power generation plan processing unit that obtains the individual power generation plan, the band constraint database that stores the output band boundary information of each thermal power generation unit and the time constraint at the time of band transition, the individual power generation plan of each thermal power generation unit, and the band constraint database. The output band of the thermal power generation unit is calculated using the above information, and the output band calculation means for calculating the upper and lower limit values of power generation in the output band and the power generation of the total thermal power generation unit with the output of the output band calculation means as a constraint condition. A power generation planning means for calculating the output distribution of the thermal power generation unit for realizing the plan is provided, and the output band calculation means is a band for allocating the output band based on the individual power generation plan for each thermal power generation unit and the output band boundary information. The allocation means, the band constraint determination means for determining the presence or absence of a band constraint violation whose output of the band allocation means is a time constraint at the time of band transition, and the output for avoiding the violation when the violation is detected by the band constraint determination means. A load distribution device for a thermal power generation plant, characterized in that a band is selected and an output means for outputting the upper and lower limits of the output in the output band to the power generation planning means is provided. "

Further, the present invention is "a load distribution method for a thermal power plant in which a plurality of thermal power generation units including a generator are configured.
Obtain the individual power generation plan for each thermal power generation unit from the given total power generation plan, store the output band boundary information of each thermal power generation unit and the time constraint at the time of band transition, and store the individual power generation plan of each thermal power generation unit and the output. The output band of the thermal power generation unit is calculated using the band boundary information and the time constraint information at the time of band transition, the upper and lower limits of power generation in the output band are calculated, and the power generation plan for the total thermal power generation unit is realized. While calculating the output distribution of the thermal power generation unit to do
In order to calculate the upper and lower limit values of power generation, the output band is allocated based on the individual power generation plan for each thermal power generation unit and the output band boundary information, and the band that is the time constraint at the time of band transition of the allocated output band. A thermal power plant characterized in that the presence or absence of a constraint violation is determined, and if a band constraint violation is detected, an output band that avoids the band constraint violation is selected and the output upper and lower limit values in the output band are set. Load distribution method. ".

According to the present invention, it is possible to obtain a power generation plan that can avoid the band constraint of each thermal power generation unit when the original power generation plan of the entire thermal power generation system is realized with the minimum fuel cost.

The figure which shows the configuration example of the load distribution device 1 of the thermal power generation system which concerns on Example 1. FIG. The figure which shows the example of the time plan value of the day of the total power generation plan given to a thermal power generation system. It is a figure which shows the value (MW) of each individual plan at the time of allocating to two thermal power generation units UA, UB in the power generation plan processing calculator 10 which does not consider a band constraint. The figure which showed the relationship of the assigned output band set in the thermal power generation unit UA and the thermal power generation unit UB in a tabular form. The figure which shows the relationship between the output plan value and the allocation output band. The figure which shows the output example of the output redistribution processing arithmetic unit 40. The figure which shows the power generation plan difference in each thermal power generation unit UA, UB and the total difference in time series. The figure which shows the corrected total power generation plan which reflected the total difference in chronological order. The figure which shows the configuration example of the load distribution device 1 of the thermal power generation system which concerns on Example 2. FIG. The figure which shows the configuration example of the load distribution device 1 of the thermal power generation system which concerns on Example 3. FIG. The figure which shows the configuration example of the load distribution device 1 of the thermal power generation system which concerns on Example 4. FIG.

Hereinafter, examples of the present invention will be described with reference to the drawings.

FIG. 1 shows a configuration example of the load distribution device 1 of the thermal power generation system according to the first embodiment of the present invention. The load distribution device 1 takes the total power generation plan for the thermal power generation system composed of N thermal power generation units as an input, and within the range of observing the power generation upper and lower limit information and output band restrictions for the generators in each thermal power generation unit. It outputs the power generation plan of each generator and the power generation plan correction result of total thermal power generation that can be expected to avoid the output band constraint. Hereinafter, the configuration of the load distribution device 1 of the present invention will be described according to the data processing procedure. In the following, one thermal power generator will be shown as a thermal power generation unit, and the difference from the generator group will be clarified.

The load distribution device 1 inputs the total power generation plan of N thermal power generation units for one day from an upper system such as a central power supply command center via the input interface I / F1. This interface corresponds to a keyboard or an electronic file input means for recording total power generation plan information. In the embodiment of the present invention, the plan for one day is described, but the time of this plan may be a plan for one week or one year.

The power generation plan processing calculator 10 that does not consider the band constraint inputs the power generation upper and lower limit information of each thermal power generation unit stored in the thermal power generation unit database DB1, the fuel cost characteristic curve for power generation, and the above total power generation plan, and equals λ. Make a power generation plan using the law. In the embodiment of the present invention, the power generation plan of each thermal power generation unit is obtained by adopting the equal λ method, but the power generation plan may be made by another method such as the quadratic programming method. As a result, the total power generation plan from the central power supply command center will be distributed to N thermal power generation units. The total of the individual power generation plans of the N thermal power generation units allocated is the value of the total power generation plan from the central power supply command center.

The power generation plan processing calculator 10 that does not consider the band constraint calculates individual power generation plans for each thermal power generation unit for N units, and outputs the output to the output band calculators 20A, 20B to 20N for each thermal power generation unit. Since the output band calculators 20A and 20B to 20N have the same configuration, the output band calculator 20A will be described below as a representative example.

In the output band calculators 20A and 20B to 20N, in addition to the individual power generation plan for the thermal power generation unit output by the power generation plan processing calculator 10 that does not consider the band constraint, the band constraint data of the thermal power generation unit input from the band constraint database DB2 Is being entered.

In the output band arithmetic units 20A and 20B to 20N, the output band allocation operation unit 21A first allocates the output band based on these data. Here, the output band shall be classified into one of an exclusion band, an interlocking band, and an output band boundary corresponding to the upper and lower limits of the interlocking band.

Next, the band constraint violation determination calculator 22A determines whether or not the output band transition violates the band constraint of the thermal power generation unit. When the output band transition violates the band constraint of the thermal power generation unit, this is stored as a violation log in the thermal power generation unit band constraint violation log database DB3A. This band constraint includes the shortest operation duration of each output band and the shortest operation duration at the output band boundary at the time of band transition. More specifically, the violation log is, for example, the total power generation plan value of the day when a violation is detected in the output band transition, and the power generation plan processing calculator 10 input from the band constraint-free power generation plan processing calculator 10 for the day. The power generation plan allocated to the thermal power generation unit and the output of the output band allocation calculator.

When a violation is detected by the above violation determination, the band constraint violation elimination calculator 23A corrects the output band so as to eliminate the violation, and corrects the output with the output reallocation processing calculator 40 and the total thermal power generation plan correction. Output to the arithmetic unit 50.

The above series of processes in the output band calculator 20A are also executed in the output band calculators 20B to 20N in the same manner, and these outputs are also transferred to the output redistribution processing calculator 40 and the total thermal power generation plan correction calculator 50. Given.

In the output redistribution processing calculator 40, the total power generation plan is redistributed to each thermal power generation unit with the output band in each time step input from the output band calculators 20A and 20B to 20N as a constraint condition. The output of the output redistribution processing calculator 40 outputs the calculation result to each thermal power generation unit outside the apparatus via the interface I / F3. By generating power according to this power generation plan, each thermal power generation unit can realize power generation as a whole thermal power generation system close to the total power generation plan while observing the constraint conditions of each thermal power generation unit.

In addition to the output band obtained by the band constraint violation solving calculator 23A, the violation log stored in the thermal power generation unit band constraint violation log databases DB3A and DB3B to DB3N is input to the total thermal power generation plan correction calculator 50. There is. In the total thermal power generation plan correction calculator 50, the power generation plans added or subtracted in each time step are totaled for each hour in order to avoid the violation, and the sum is added to the original total power generation plan to obtain the corrected total power generation plan. calculate. The calculated corrected total power generation plan is output to the outside of the device via the interface I / F2. As the form of output, it is assumed that the corrected total plan is displayed in a tabular format on the display. The display method of the total power generation plan before and after this correction may be output to a file as a graph display or text data that can be extracted externally.

Hereinafter, the data processing of the present invention will be described with N = 2 (thermal power generation units UA, UB) and specific numerical values.

First, FIG. 2 shows the daily time plan value of the total power generation plan by the two thermal power generation units given to the thermal power generation system by the central power supply command center. The horizontal axis shows the time t, and the vertical axis shows the value (MW) of the total power generation plan given to the thermal power generation system. As shown in FIG. 2, as the value (MW) of the total power generation plan given to the thermal power generation system, the power generation having the minimum output of 4 MW and the maximum output of 23 MW is input as the total power generation plan.

FIG. 3 shows the values (MW) of each individual plan when the two thermal power generation units UA and UB are allocated in the power generation plan processing calculator 10 that does not consider the band constraint. The thermal power generation unit UA shown on FIG. 3 is operated all day with an output that fluctuates depending on the time zone. The thermal power generation unit UB shown at the bottom of FIG. 3 is subjected to daytime operation and nighttime stop operation (daily start, daily stop) with an output that fluctuates depending on the time zone.

In the example of FIG. 3, the value (MW) of the individual power generation plan given to the thermal power generation unit UA is assumed to be power generation with a minimum output of 4 MW and a maximum output of 15 MW. Further, the value (MW) of the individual power generation plan given to the thermal power generation unit UB is said to be power generation with a minimum output of 0 MW and a maximum output of 8 MW.

As described above, the thermal power generation unit UA and the thermal power generation unit UB have different operation modes and different rated power generation capacities. In these operations, exclusion bands and interlocking bands are set as constraints on different sizes or widths. Here, it is assumed that the thermal power generation unit UA and the thermal power generation unit UB have one exclusion band on the output upper limit side and one exclusion band on the output lower limit side, and one interlocking band between them. The conditions for the output band are as follows.

<Thermal power generation unit UA>
Output lower limit side exclusion band B1a: 2MW
Output upper limit side exclusion band B2a: 15MW
Interlocking band Ba: 4 to 13 MW
Band constraint B11 (minimum boundary operation time when band transitions between bands): 2 time steps (excluding startup)
Band constraint B12 (minimum continuous operation period in the band): 3 time steps <thermal power generation unit UB>
Output lower limit side exclusion band B1b: 1MW
Output upper limit side exclusion band B2b: 9MW
Interlocking band Bb: 2-8 MW
Band constraint B21 (minimum boundary operation time at band transition): 1 time step (excluding startup) Band constraint B22 (minimum continuous operation period within band): 2 time steps
Here, one time step is, for example, 10 minutes. Therefore, the two time steps of the band constraint B11 stipulate that the minimum boundary operation time for band transition between bands is required to be 20 minutes or more except at the time of activation, and the three time steps of the band constraint B12. Stipulates that the minimum continuous operation period in the band is required to be 30 minutes or more.
FIG. 4 shows the relationship between the allocated output band set in the thermal power generation unit UA and the thermal power generation unit UB, and the output upper limit and the output lower limit in a tabular form. Only the interlocking band is set with different output upper limit and output lower limit values, and the output upper limit and output lower limit values are the same in the non-interlocking bands.

FIG. 5 is a diagram showing the relationship between the output planned value and the allocated output band, and shows the relationship of FIG. 4 by adopting the output planned value on the horizontal axis and the allocated output band on the vertical axis. The band names are also written on the vertical and horizontal axes. According to this figure, when the output planned value increases from 0 to the rating, the output band is in the order of stop → output lower limit side exclusion band B1 → interlocking lower limit → interlocking upper limit → output upper limit side exclusion band B2 → rated output. It will be a transition. Further, when the output planned value fluctuates arbitrarily, the state transitions between the output bands adjacent to each other.

Further, FIG. 5 shows an example of an output band determination method in the output band allocation calculator 21. Although an example of the thermal power generation unit UA is shown here, the thermal power generation unit UB can be determined with the same idea. In the output band allocation calculator 21A, as shown in FIG. 5, the output band is allocated with the middle of the boundary of each output band as a boundary, and various ideas can be adopted for this allocation method.

As a result, the output band allocations of the output band allocation calculators 21A and 21B are shown in the lower part of each power generation plan graph of FIG. According to this, for the thermal power generation unit UA, since there is no period of 2 MW or less, the application period of the output lower limit side exclusion band B1a is not applied, and the periods t0, t11, t12 of the minimum output 4 MW are set as the interlocking lower limit, 4 ~ 13MW period t1, t2, t5, t, 8, t9, t10 are set as interlocking band Ba, 13MW period t3, t6 are set as interlocking upper limit, and 15MW period t4, t7 are output upper limit side exclusion band. It is referred to as B2a. Similarly, for the thermal power generation unit UB, the period of 1 MW or less is the stop period, the period t2 of 2 MW is the lower limit of interlocking, and the periods t3 and t5 to t10 of MW of 2 to 8 or less are the interlocking bands Bb. The period t4 of 8 MW is set as the interlocking upper limit.

The band constraint violation determination calculators 22A and 22B determine whether the output bands allocated to the thermal power generation units UA and UB satisfy the band constraints B11, B12, B21 and B22, respectively. In the example of FIG. 3, the band constraint violation determination calculator 22A of the thermal power generation unit UA has the output band transitioned from the interlocking band to the output upper limit side exclusion band B2a in the periods t4 and t7, but the thermal power generation unit UA Since the band constraint conditions B11 and B12 are violated, the violation is detected. In this example, 20 minutes is required for the minimum boundary operation time specified by the band constraint B11 for the band transition from the period t3 to the period t4 (transition from the interlocking band Ba to the exclusion band B2a). Since it required the minimum boundary operation time within the range, it was regarded as a violation of the band constraint condition B11. Further, in this example, since the operation time of 30 minutes or less is required for the duration of the excluded operation of the period t7 of 30 minutes or more specified by the band constraint B12, it is a violation of the band constraint condition B12. Was done. By this violation detection, the violation log is saved in the thermal power generation unit band constraint violation log database DB3A, and the band allocation correction command is output to the band constraint violation elimination calculator 23A.

Looking at the band constraint violation determination calculator 22B, it has transitioned directly from the interlocking band to the stop without passing through the exclusion band B1b in the periods t10 and t11, and since it violates the band constraint B21, the violation is detected. To do. In this case, the passage of the excluded band is detected in a time shorter than the minimum boundary operation time of 10 minutes or more defined by the band constraint B21. By this violation detection, the violation log is saved in the thermal power generation unit band constraint violation log DB3B, and the band allocation correction command is output to the band constraint violation elimination calculator 23B.

The band constraint violation elimination calculator 23A resolves the violation by correcting the output bands of the periods t4 and t7 from the exclusion band B2a to the upper limit of the interlocking band. Further, the band constraint violation elimination calculator 23B changes the period t11 from the interlocking band Bb to the interlocking lower limit, and in the period t12, the violation is resolved by correcting the output band from the stop to the exclusion band B1b. The band constraint violation solving calculators 23A and 23B associate the output band shown in FIG. 4 with the upper and lower limits of power generation in the corresponding output band, and output the power to the output redistribution processing calculator 40. The upper part of FIG. 4 shows the correspondence in the thermal power generation unit UA in a table format, and the lower part of FIG. 4 shows the correspondence in the thermal power generation unit UB in a table format. This relates to the output band described above. The conditions are arranged in a table format for each thermal power generation unit.

In response to the output band change, the output redistribution processing calculator 40 reallocates the overall power generation plan so as to satisfy the corrected total power generation plan which is the output of the combined thermal power generation plan correction calculator 50 described later.

The output of the output redistribution processing calculator 40 is shown in FIG. According to this modified example, as is clear from the comparison between the upper part of FIG. 3 and the upper part of FIG. 6, in the thermal power generation unit UA in the upper part of FIG. 6, this period is redefined from the exclusion band to the interlocking upper limit for the periods t4 and t7. This limits the output to 13 MW. Further, according to this modified example, as is clear by comparing the lower part of FIG. 3 and the lower part of FIG. 6, in the thermal power generation unit UB in the lower part of FIG. 6, this period is redefined from the interlocking to the interlocking upper limit for the period t7. The output is raised to 8 MW. In the thermal power generation unit UB, the output is increased to 2 MW by redefining this period from stop to the lower limit of interlocking for the period t11, and this period is redefined from the stop to the exclusion band B1b for the period t12, and the output is set to 1 MW. I'm raising it. With this modification, the band constraint violation will be resolved by setting the upper and lower limits of the thermal power generation unit by changing the output band.

The processing of the total thermal power generation plan correction calculator 50 will be described with reference to FIGS. 7 and 8. FIG. 7 is a diagram showing a time series of power generation plan differences and their total differences in each of the thermal power generation units UA and UB, and FIG. 8 is a diagram showing a corrected total power generation plan reflecting the total differences in time series.

According to FIG. 7, the difference is that the thermal power generation unit UA decreases by 2 MW in the period t4 and t7, the thermal power generation unit UB increases by 2 MW in the period t7, and increases by 2 MW in the period t11 and increases by 1 MW in the period t12. It is occurring. The total power generation plan difference is 2 MW decreased in the period t4, increased by 2 MW in the period t11, and increased by 1 MW in the period t12.

As shown in FIG. 7, the load distribution device 1 of the present invention adds up the power generation plan differences adjusted for eliminating the band constraint violation by the total thermal power generation plan correction calculator 50, and further adds the sum to the original total power generation plan. The corrected total power generation plan shown in FIG. 6 is calculated by adding to. In the examples shown in FIGS. 6 and 7, a decrease in the total output in the period t4 is unavoidable, but in the period t7, the decrease in the total output can be prevented and the initial plan can be maintained. By extending the output period of the thermal power generation unit UB at times t11 and t12, the amount of power generated when the thermal condition relaxation operation is executed when the thermal power generation unit UB is stopped is also taken into consideration.

The operator of the load distribution device can confirm the correspondence before and after the modification by comparing the original overall thermal power generation plan shown in FIG. 2 with the modified overall thermal power generation plan shown in FIG. In FIG. 8, these are displayed in comparison with one leaf, but by reviewing the difference to the corrected total power generation plan shown by the broken line, a correction plan for avoiding the occurrence of band constraint violation at the stage of the total power generation plan should be presented. Can be done. By applying this amendment to power generation bidding, power generation companies can achieve both avoidance of band restrictions on thermal power generation units and avoidance of imbalance with power generation plans.

FIG. 9 shows a configuration example of the load distribution device 1 of the thermal power generation system according to the second embodiment of the present invention. In the first embodiment, the correction plan of the total power generation plan is implemented inside the load distribution device 1, but in the second embodiment, the file storage processing calculator 60 and the file for storing the log data as a file are shown in FIG. It is configured to include an interface I / F4 for taking out a log data file which is an output of the storage processing arithmetic unit 60.

With this configuration, it is possible to calculate a correction plan for the analysis of the log data file by an external device or the like, and it is possible to achieve the same effect while reducing the calculation load inside the load distribution device 1.

FIG. 10 shows a configuration example of the load distribution device 1 of the thermal power generation system according to the third embodiment of the present invention. In the third embodiment, as shown in FIG. 10, the configuration includes a file transmission processor 70 that transmits log data stored in a file via a network, and an interface I / F 5 with an external network.

With this configuration, it is possible to analyze log data by an analyst or an analyzer at a remote location, and it is possible to achieve the same effect while reducing the computational load inside the load distribution device 1. It becomes.

FIG. 11 shows a configuration example of the load distribution device 1 of the thermal power generation system according to the fourth embodiment of the present invention. In the fourth embodiment, when a band constraint violation occurs, a mechanism for leaving a log at that time is used. However, when the above band constraint violation occurs, as shown in FIG. 11, the occurrence of the band constraint violation of each thermal power generation unit is totaled. The violation totaling machine 80 is provided, and a mechanism for outputting an alarm to the operator of the load distribution device 1 via the interface I / F6 is provided.

The interface I / F6 is a display of the load distribution device, and it is possible to prompt the review of the overall power generation plan by visually displaying the occurrence of the band constraint violation.

1: Load allocation device 10: Power generation plan processing calculator 20A, 20B to 20N without band constraint consideration: Output band calculator 40: Output redistribution processing calculator 50: Total thermal power generation plan correction calculator 21A: Output band allocation calculator 22A: Band constraint violation determination calculator 23A: Band constraint violation resolution calculator 60: Band constraint violation log storage calculator 70: Band constraint violation log transmission processing calculator I / F1, I / F2, I / F3, I / F4 , I / F5, I / F6: Input / output interface DB1: Thermal power generation unit database DB2: Band constraint database DB3A, DB3B to DB3N: Thermal power generation unit band constraint violation log database

Claims (5)

It is a load distribution device for a thermal power plant consisting of multiple sets of thermal power generation units including a generator.
A power generation plan processing unit that obtains an individual power generation plan for each thermal power generation unit from a given total power generation plan, a band constraint database that stores output band boundary information of each thermal power generation unit and time constraints at the time of band transition, and each thermal power generation unit. Output that calculates the output band of the thermal power generation unit using the individual power generation plan of each thermal power generation unit and the information stored in the band constraint database, and calculates the upper and lower limit values of power generation in the output band. Output redistribution processing that calculates the output distribution of the thermal power generation unit to realize the power generation plan for the total thermal power generation unit with the output of the band processing unit and the output band processing unit provided for each thermal power generation unit as a constraint condition. Equipped with a unit and a total thermal power generation plan correction processing unit
The output band processing unit has a band allocation means for allocating an output band based on the individual power generation plan and the output band boundary information for each thermal power generation unit, and the time constraint when the output of the band allocation means is band transition. By a band constraint determining means for determining the presence or absence of a certain band constraint violation, a violation log recording means for recording the power generation plan when a band constraint violation occurs and the output of the band allocation means as log data, and the band constraint determining means. When a violation is detected, an output band for avoiding the violation is selected, and an output means for outputting the upper and lower limit values of the output in the output band to the output redistribution processing unit is provided.
The total thermal power generation plan correction processing unit receives the output of the violation log recording means of each thermal power generation unit as an input, and corrects the power generation plan of the entire thermal power plant so as to avoid a band constraint violation. Plant load distribution device. The load distribution device for a thermal power plant according to claim 1.
A plurality of thermal power generation units including a generator are operated according to the output distribution of the thermal power generation unit obtained by the output redistribution processing unit, and the power generation plan of the entire corrected thermal power generation plant obtained by the total thermal power generation plan correction processing unit is A load distribution device for a thermal power plant, characterized by being externally output and provided. The load distribution device for the thermal power plant according to claim 1 or 2.
A load distribution device for a thermal power plant, comprising means for transmitting the output of the violation log recording means to the outside via a communication network. The load distribution device for the thermal power plant according to any one of claims 1 to 3.
A load distribution device for a thermal power plant, which is provided with an interface that aggregates detection information of band constraint violations and displays to the operator that the violation has occurred when a band constraint violation occurs. It is a load distribution method for a thermal power plant consisting of multiple sets of thermal power generation units including a generator.
Obtain the individual power generation plan for each thermal power generation unit from the given total power generation plan, store the output band boundary information of each thermal power generation unit and the time constraint at the time of band transition, and store the individual power generation plan of each thermal power generation unit and the output. The output band of the thermal power generation unit is calculated using the band boundary information and the time constraint information at the time of band transition, the upper and lower limit values of power generation in the output band are calculated, and each thermal power generation unit is in the output band. With the upper and lower limits of power generation as a constraint condition, the output distribution of the thermal power generation unit for realizing the power generation plan for the total thermal power generation unit is calculated, and at the same time.
In order to calculate the upper and lower limit values of power generation, the output band is allocated based on the individual power generation plan for each thermal power generation unit and the output band boundary information, and the band constraint which is the time constraint at the time of band transition of the allocated output band. The presence or absence of a violation is determined, the power generation plan when a band constraint violation occurs and the allocated output band are recorded as log data, and when a band constraint violation is detected, an output band that avoids the band constraint violation is recorded. Select and use it as the upper and lower limit of power generation in the output band .
A load distribution method for a thermal power plant, which comprises correcting the power generation plan of the entire thermal power plant so as to avoid the band constraint violation by using the power generation plan when a band constraint violation occurs and the allocated output band. ..

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