JP4804410B2 - Power generation plan formulation device and power generation plan formulation method - Google Patents

Description

  The present invention relates to a power generation plan formulation device and a power generation plan formulation method implemented in a power supply operation / control system such as a central power supply command center.

  Conventionally, when determining the output of a generator series consisting of a group of generators, such as a generator series consisting of a plurality of multi-shaft combined cycle generators, the generator series is actually a plurality of steam turbine generators and gas turbines. Despite being composed of generators, etc., data unique to power generation equipment such as fuel unit price and change speed is managed in units of generator series, and one unit is used when determining the output of one generator series. It is treated as a generator.

  Moreover, in patent document 1, in the power generation operation management system, a general operation management device that monitors the operation of a plurality of generators at one location is provided, and a power generation planning unit is provided in the general operation management device. The power generation planning unit determines, for each generator in the pipe, an output value that minimizes the power generation cost, a plan for allowing a stop when an abnormality occurs, and the like.

Japanese Patent Laid-Open No. 11-299099

  However, the conventional technique has the following problems. When determining the output of the generator series, data unique to the power generation equipment is managed in units of generator series, and one generator series is handled as one generator. For this reason, it was possible to determine the number of operating generators belonging to the generator series according to a predetermined work stoppage plan by reflecting the output upper and lower limit constraints of one generator series. However, the number of operating units was not determined based on economic indicators such as fuel unit price.

  In addition, a thermal power plant that has received a power generation command in units of generator series from a central power supply command station, etc. determines the number of operating generator groups to belong to based on the output in units of generator series. It was necessary to determine the output of each affiliated generator by dividing the output by the number of starter generators. However, the number of units in operation was not determined based on economic indicators.

  In Patent Literature 1, the number of pipe generators to be operated is not determined based on the economic index.

  The present invention has been made in view of the above, and can determine the number of operating generators belonging to a generator series based on an economic index for a generator series composed of generator groups. An object is to obtain a power generation plan formulation device and a power generation plan formulation method.

  The power generation plan formulation device according to the present invention includes the generator series and the generator series when one or a plurality of generator series composed of a plurality of generators and one or a plurality of other generators other than the generator series are mixed. A power generation plan formulation device for determining a power generation plan by determining an output of the other power generator and determining the number of operating power generators belonging to the power generator series, wherein the power generator belongs to the power generator series And a set of output upper and lower limit values corresponding to the generator series corresponding thereto, a database in which a plurality of operating generators of the affiliated generator are described, data serving as an economic index, and the generator series And the output upper / lower limit value constraint data that gives constraints on the output upper / lower limit values of the other generators, and the power generation facility specific data that stores the power generation facility specific data determined depending on the power generation facility Based on the storage unit and the power generation equipment specific data, the output is determined in time series for each of the generator series in units of generator series and for the other generators in units of generators. The generator series unit output is described in the database based on the generator output formulation unit, the generator series unit output for the generator series determined by the generator output formulation unit, and the contents of the database. Generator series unit for calculating the number of generators to which the generator series belongs and the output upper and lower limit values in a time series by determining which of the ranges specified by a set of output upper and lower limit values When the output analysis unit and the number of operating generators calculated by the generator series unit output analysis unit repeat increase and decrease more than a predetermined number of times for a predetermined time interval, the increase and decrease are repeated. By correcting in a direction to increase the number of operating units in the returned period, the belonging generator operating number smoothing unit that smoothes the belonging generator operating number, and the generator series unit output analysis unit, If the number of operating units is smoothed based on the number of operating generators output from the belonging generator operating unit smoothing unit and the contents of the database, the generator series unit output analysis unit calculates The output upper / lower limit value is corrected, and the output upper / lower limit value is stored as output upper / lower limit constraint data in the power generation facility specific data storage unit, and the generator output formulation unit again generates the power generation facility specific data. Based on the above, the output is determined in time series for the generator series and the other generators.

  According to this invention, it is possible to determine the output of the generator series based on the economic index such as the unit price of fuel, and to determine the number of operating generators belonging to the generator series. For this reason, when formulating a supply and demand operation plan for a multiple generator system in which a generator series and other generators that are single generators are mixed, first, the generator series and other generators On the other hand, after the start / stop and output distribution plan is formulated, the number of operating generators belonging to the generator series can be determined.

  Hereinafter, embodiments of a power generation plan formulation device and a power generation plan formulation method according to the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

Embodiment 1 FIG.
FIG. 1 is a diagram illustrating a configuration of a power generation plan formulation apparatus according to the present embodiment. As shown in FIG. 1, the present embodiment includes three storage devices 1 to 3, a generator output formulation unit 4, an assigned generator operation number smoothing unit 5, and an input / output device 6 having a display screen. A generator series unit output analyzing unit 7.

  In the present embodiment, for example, one or a plurality of generator series including a generator group (that is, a plurality of generators) exist, and another generator including a single generator other than the generator series ( Hereinafter, this is applied to power generation plan formulation such as demand operation plan formulation for a multi-generator system having one or more generators. The generator series includes, for example, a plurality of multi-shaft combined generators.

  The storage device 1 is a database, and the number of operating generators belonging to the generator series (hereinafter referred to as the number of operating generators) and the corresponding output upper and lower limit values of the generator series correspond to the number of operating generators belonging. Each data table is stored as a plurality of described data tables. That is, the output range defined by the output upper and lower limit values is associated with the number of generators operating when the output of the generator series is within the output range. The contents of this data table are input and updated via the input / output device 6.

  The storage device 2 holds power generation equipment specific data specific to the power generation equipment determined depending on the power generation equipment such as fuel unit price, fuel consumption constraint, change speed constraint, and output upper and lower limit constraints. , Give economic indicators in power generation planning. The power generation equipment specific data is stored for each generator series for the generator series consisting of the generator group, and for other generators that are a single generator other than the generator series. Data is held in units of generators. As will be described later, the output upper / lower limit restriction gives a restriction on the upper / lower limit values for the output of the generator series and other generators.

  Next, the operation of the present embodiment, that is, the power generation plan formulation method according to the present embodiment will be described with reference to FIGS. FIG. 2 is a diagram showing an example of the output of the generator series unit and other generator units determined by the generator output formulation unit 4, and FIG. 3 refers to the data table of the storage device 1 for each unit time. FIG. 4 is a diagram showing an example of determining the number of operating generators and the output upper and lower limit values, and FIG. 4 is a diagram showing an example of smoothing the number of operating generators when the number of operating generators repeatedly increases and decreases in a short time. is there.

  As shown in FIG. 1, the generator output formulation unit 4 receives the power generation facility specific data stored in the storage device 2 (S1), and inputs one or more power generation series and one or more other generators. On the other hand, for example, as shown in FIG. 2, the output for each unit time is determined in time series, and the output result is stored in the storage device 2 (S2). The output result by the generator output formulation unit 4 is given in units of generator series and other generators according to the generator series and other generators, respectively. In the storage device 2, “generator series unit output” and “ "Other generator output". Further, FIG. 2 shows a state in which, for example, an output for each unit time is given in time series to one generator series and three other generators. As described above, the power generation equipment specific data includes data such as the fuel unit price, which is an economic index, and the generator output formulation unit 4 uses an optimization method such as the equal lambda method, for example. The output distribution that minimizes the cost is determined by constraint conditions such as limit constraints, and output as “generator series unit output” and “other generator output”. Note that the output upper and lower limit constraints included in the power generation equipment specific data are initially set values given in advance at this stage.

  Next, the generator series unit output analyzing unit 7 stores the data table (the number of generators operating, the output upper and lower limit values) held in the storage device 1 with respect to the generator series unit output output to the storage device 2. (S3), for example, as shown in FIG. 3, the number of operating generators per unit time and the output upper and lower limit values are determined, and these analysis results are stored in the storage device 1. In FIG. 3, by comparing the three output ranges A, B, and C determined from the output upper and lower limit value data held in the data table with the output of the generator series given in time series, Has determined the number of generators to which it belongs. For example, at time “4”, since the output value of the generator series is approximately 200, it belongs to the output range C, and the number of operating generators corresponding to the output range C is defined as one in the data table. Therefore, the number of operating generators is determined as one. Further, the output upper and lower limit values at time “4” are determined by the upper limit value and lower limit value of the output range C. It is similarly determined at other times. Subsequently, the generator series unit output analysis unit 7 stores the number of generator generators per unit time determined for each generator series in the storage device 3 (S4).

  The affiliated generator operation number smoothing unit 5 takes the affiliated generator operation number stored in the storage device 3 as an input (S5), and considers the operation number smoothing. If the generator output unit 4 determined by the generator output formulation unit 4 and output to the storage device 2 (see FIG. 2) repeats the increase / decrease in the number of operating units in a short time, the generator operating unit smoothing unit 5 to correct the number of operating generators. At this time, when the increase / decrease in the number of operating units is repeated in a short time, the affiliated generator operating number smoothing unit 5 refers to the number of operating units before and after and corrects the number of operating units to increase. For example, in FIG. 4, the number of operating units is repeatedly increased and decreased in a short time, with 3 units at time “19”, 2 units at time “20”, and 3 units at time “21”. Therefore, the assigned generator operating number smoothing unit 5 smoothes the operating number at times “19” to “21” by setting the operating number at time “20” to three. This eliminates the need to repeat the operation / stop of the generator in a short time. In addition, the direction of correction of the number of operating units is preferably set in the direction of increasing the number of operating units from the viewpoint of reducing the distribution load to each belonging operating generator. The determination as to whether or not to smooth the number of operating units is performed, for example, by examining whether or not the number of operating units has been increased or decreased repeatedly for a predetermined number of times set in a predetermined time interval. . As shown in FIG. 1, the assigned generator operating number smoothing unit 5 outputs the corrected assigned generator operating number to the storage device 3 (S6). When the number of operating generators is not required to be smoothed, the assigned generator operating number smoothing unit 5 outputs the number of assigned generators operated from the storage device 3 to the storage device 3 without processing it ( S6).

  Next, the generator series unit output analysis unit 7 refers to the result of smoothing the number of assigned generators output to the storage device 3 and the data table of the storage device 1 (S7), and stores the storage device according to the smoothing. Correct the output upper and lower limit values stored in 1. That is, referring to the data table, correction is made to the output upper and lower limit values corresponding to the number of operating units at the time when the correction was made. Subsequently, the generator series unit output analysis unit 7 outputs the corrected output upper and lower limit values per unit time to the storage device 2 as the output upper and lower limit constraints of the generator series (S8). As described above, the output upper and lower limit constraints initially set in the storage device 2 are updated to reflect the output from the generator output formulation unit 4.

  Next, the generator output formulation unit 4 receives the power generation facility specific data including the output upper and lower limit constraints of the generator series stored in the storage device 2, and again with respect to the generator series and other generators, An output for each unit time is determined in time series and output to the storage device 2 (S2). At this time, the output is determined using, for example, an equal lambda method. Since the output upper and lower limit constraints are updated as described above, optimization can be achieved in a more limited parameter space.

  Subsequently, the generator series unit output stored in the storage device 2 and the assigned generator operating unit smoothing result stored in the storage device 3 are output to the generator series composed of a plurality of generator groups (S9, S10) The other generator output stored in the storage device 2 is output to the other generator which is a single generator (S10).

  According to the present embodiment, the output of each generator series and the output of each other generator are determined based on an economic index such as the unit price of fuel, and the number of operating generators belonging to each generator series is determined. Can do. For this reason, when formulating a supply and demand operation plan for a multi-generator system in which a generator series and other generators coexist, based on economic indicators, first, start and stop and output to the generator series and other generators. After formulating the allocation plan, the number of generators that belong to the generator series can be determined.

  In this embodiment, for example, three storage devices are used. However, the present invention is not limited to this. For example, if a similar function is realized, a single storage device may be used. In the present embodiment, the case where the generator series and other generators coexist has been described, but the present invention can be similarly applied to the case where only a plurality of generator series exist.

Embodiment 2. FIG.
FIG. 5 is a diagram showing the configuration of the power generation plan formulation apparatus according to the present embodiment. The present embodiment has a function of acquiring the power generation facility specific data from the power plant in the configuration of the first embodiment.

  As shown in FIG. 5, in the present embodiment, the power generation equipment specific data including the unit price of fuel, the changing speed, etc., from the “generator series consisting of a plurality of generator groups” and “other generators” provided in the power plant. Is stored in the storage device 2. The generator series holds data in units of generator series, and the other generators hold data in units of generators. Further, the power generation facility specific data may be acquired and updated from the power plant when the power generation plan formulation device is started, or may be updated by periodically acquiring the data. .

  In the present embodiment, by the same method as in the first embodiment, the output of the generator series and the number of operating generators and the output of other generators are determined, and the number of operating generators and each output are determined at the power plant. Output for. Other configurations, operations, and effects of the present embodiment are the same as those of the first embodiment. Therefore, in FIG. 5, the same components as those in FIG. 1 are denoted by the same reference numerals, and detailed description thereof is omitted.

  As described above, the power generation plan formulation apparatus according to the present invention is suitable for comprehensively managing the operation of a plurality of power plants and formulating a power generation plan.

It is a figure which shows the structure of the power generation plan formulation apparatus concerning Embodiment 1. FIG. In Embodiment 1, it is a figure which shows the example of the output of the generator series unit determined by the generator output formulation part, and another generator unit. In Embodiment 1, it is a figure which shows the example which referred the data table of the memory | storage device, and determined the number of the generator generators and the output upper / lower limit value for every unit time. In Embodiment 1, it is a figure which shows the example of smoothing of the number of affiliated generator operation when the number of affiliated generator operation repeats increase / decrease in a short time. It is a figure which shows the structure of the power generation plan formulation apparatus concerning Embodiment 2. FIG.

Explanation of symbols

1 Storage device (database)
2, 3 Storage device 4 Generator output formulating unit 5 Affiliated generator operation number smoothing unit 6 Input / output device 7 Generator series unit output analysis unit

Claims (3)

When one or a plurality of generator series composed of a plurality of generators and one or a plurality of other generators other than the generator series are mixed, the output of the generator series and the other generators is determined. A power generation plan formulation device that performs a power generation plan by determining the number of operating generators belonging to the generator series,
A database in which the number of operating generators belonging to the generator series and a set of output upper and lower limit values corresponding to the generator series corresponding thereto are described for each operating number of the belonging generators,
Power generation equipment specific data determined depending on the power generation equipment, including at least data serving as an economic index and output upper and lower limit value constraint data that gives constraints on the output upper and lower limit values of the generator series and the other generators A power generation facility specific data storage unit storing
Based on the power generation equipment specific data, the generator output formulation that determines the output in chronological order for each of the generator series and in units of the generator for the other generators, respectively. And
Based on the generator series unit output for the generator series determined by the generator output formulation unit and the contents of the database, a plurality of output upper and lower limit values in which the generator series unit output is described in the database A generator series unit output analysis unit that calculates the number of generators belonging to the generator series and the output upper and lower limit values in time series by determining which of the ranges defined by the set of
When the number of operating generators calculated by the generator series unit output analysis unit repeats increasing / decreasing more than a predetermined number of times for a predetermined time interval, increase the operating number in the period when the increase / decrease is repeated. By correcting in the direction, the assigned generator operation number smoothing unit for smoothing the assigned generator operation number,
With
The generator series unit output analysis unit, when the number of operating units is smoothed based on the number of operating generators output from the belonging generator operating unit smoothing unit and the contents of the database The output upper / lower limit value calculated by the generator series unit output analysis unit is corrected, and further, the output upper / lower limit value is stored as output upper / lower limit constraint data in the power generation facility specific data storage unit, and the generator output is formulated. The unit again determines the output in time series for the generator series and the other generators based on the power generation facility specific data.   The power generation facility specific data is updated by acquiring the power generation facility specific data from a power plant provided with the generator series and the other generators, respectively. Power generation plan development device. When one or a plurality of generator series composed of a plurality of generators and one or a plurality of other generators other than the generator series are mixed, the output of the generator series and the other generators is determined. And a power generation plan formulation method for performing a power generation plan by determining the number of operating generators belonging to the generator series,
Based on power generation equipment specific data determined depending on the power generation equipment including at least data that is an economic index and output upper and lower limit value constraint data that gives constraints on the output upper and lower limit values of the generator series and the other generators A step of determining output in time series by the generator output formulation unit in units of generator series for the generator series and in units of generators for the other generators;
A database in which the number of operating generators belonging to the generator series and a set of output upper and lower limit values corresponding to the generator series corresponding thereto are described for each operating number of the assigned generators, and the generator output formulation unit Based on the generator series unit output for the generator series determined by the generator series unit output analysis unit, the generator series unit output is defined by a set of output upper and lower limit values described in the database. Determining which of the ranges to be assigned, calculating the number of generators belonging to the generator series and the output upper and lower limit values in time series, and
When the number of assigned generators operated by the assigned generator operating unit smoothing unit repeatedly increases or decreases more than a predetermined number of times for a predetermined time interval, Smoothing the number of operating generators by correcting the direction of increasing the number of operating units in a period in which the increase and decrease are repeated; and
When the number of operating units is smoothed by the generator series unit output analysis unit based on the number of operating generator operating units output from the belonging generator operating unit smoothing unit and the contents of the database Correcting the output upper and lower limit values calculated by the generator series unit output analysis unit, and further storing the output upper and lower limit values as output upper and lower limit constraint data in the power generation equipment specific data storage unit;
The generator output formulation unit again determines the output in time series for the generator series and the other generators based on the power generation equipment specific data;
A power generation plan formulation method characterized by including:

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