JP2012235599A - Generator control system and generator control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately control an output of a generator so as to reach a predetermined output value.SOLUTION: A generator control system includes: an output database 3 for storing a past output locus T of a generator 12; a calculation section 4 for calculating an actual changed locus from the output locus T in the output data base 3 upon input of a variation parameter indicating how to change an output of the generator 12; and a control section 5 for controlling the output of the generator 12 on the basis of the actual changed locus calculated by the calculation section 4. The actual changed locus is equal to an amount of increase or decrease in the variation parameter, and an output state before the actual changed locus is equal to an output state immediately before a current point.

Description

  The present invention relates to a generator control system and a generator control method for controlling the output and power generation amount of a generator.

  For example, in an automatic power supply system, in order to output an appropriate amount of power generated according to changes in power demand, an appropriate and optimum output (power generation amount) corresponding to constantly changing power demand is commanded to the generator. Yes. And in order to perform such an appropriate output command, the generator output change speed measured in advance experimentally in the field is set in the automatic power feeding system.

  For example, when the output of the generator is increased from 100 MW to 150 MW, it is assumed that an output change indicating line L1 as shown in FIG. 5 is obtained in the experimental measurement. In this case, from 100 MW to 150 M changes linearly in 5 minutes, the generator output change rate becomes 10 MW / min, and this change rate is set and stored in the automatic power supply system. When the output of the generator is increased from 100 MW to 150 MW during actual operation, an output increase command of 10 MW / min is sent to the generator for control.

  Moreover, the technique which tries to make the demand amount total and power generation total in a fixed time correspond is known (for example, refer patent document 1). This technology displays the predicted load value, planned power generation value, actual load value, actual power generation value, etc. on the screen, so that the supply and demand situation can be grasped and corrections by the operator can be made in a timely manner. .

JP 2002-345154 A

  By the way, when the output of the generator is controlled at a generator output change rate set in advance in the automatic power feeding system, an error or difference may occur in the actual generator output. For example, when the generator output is increased from 100 MW to 150 MW as described above, a generator output change rate of 10 MW / min is commanded to the generator, and this 10 MW / min was obtained by experimental measurement. Is. That is, as shown in FIG. 5, the change speed obtained when the output before changing the output is stable at 100 MW.

  Therefore, for example, as shown in the output locus L2 of FIG. 6, when the output state before the increase from 100 MW to 150 MW has decreased from an output higher than 150 MW to 100 MW, a change rate of 10 MW / min is generated. Even if the machine is commanded, the output does not increase at 10 MW / min indicated by the broken line in the figure, but the output changes as indicated by an output locus L2 indicated by the solid line in the figure. That is, it takes 6 minutes to increase the output from 100 MW to 150 M, and the generator output change rate is about 8.3 MW / min, resulting in a control delay. For this reason, in order to prevent such a control delay, the driver must manually set the command value to the generator, which not only requires a lot of labor, but also includes variations in control accuracy, instability, etc. Could occur.

  Therefore, an object of the present invention is to provide a generator control system and a generator control method that can appropriately control the output of the generator to a predetermined output value.

  In order to solve the above-mentioned problem, the invention according to claim 1 is in a state in which the output of the generator fluctuates in the storage means for storing the past output locus of the generator and the output locus. When an output locus is an actual variation locus and a change parameter indicating how the output of the generator is to be changed is input, the actual variation locus is the same as or approximate to the change parameter, and the actual variation Indexing means for determining from the output trajectory of the storage means an actual fluctuation trajectory that is the same as or approximated to the output state of the generator before the output change due to the change parameter is the output state of the generator before the trajectory; A generator control system comprising: control means for controlling the output of the generator based on the actual fluctuation trajectory determined by the index means.

  According to the present invention, when a change parameter, for example, a change parameter for changing the output from the output A to the output B, is input in order to change the output of the generator, the following actual fluctuation locus is obtained by the indexing means. Is determined. That is, the actual fluctuation locus in which the output fluctuates from the output A to the output B, and the output state before the actual fluctuation locus is the output state before the output change by the change parameter, for example, the latest and immediately preceding output at the present time An actual fluctuation locus that is the same as or close to the state is determined from the past output locus. And the output of a generator is controlled by the control means based on the calculated actual fluctuation locus.

  According to a second aspect of the present invention, in the generator control system according to the first aspect, the control means controls the output of the generator so as to follow the actual fluctuation locus determined by the indexing means. It is characterized by.

  According to a third aspect of the present invention, a past output trajectory of a generator is stored, an output trajectory in a state in which the output of the generator fluctuates is set as an actual fluctuation trajectory in the output trajectory, and the generator Is an actual variation locus that is the same as or approximates to a variation parameter that indicates how to change the output of the generator, and the output state of the generator before the actual variation locus before the output change by the variation parameter is performed A generator control characterized in that an actual fluctuation trajectory that is the same as or approximate to the output state of the generator is determined from the stored output trajectory, and the output of the generator is controlled based on the calculated actual fluctuation trajectory. Is the method.

  According to the first and third aspects of the present invention, not only the actual variation trajectory is the same or approximate to the change parameter, but the output state before the actual variation trajectory is the same as the output state before the output change (latest / immediately before) or Since the output of the generator is controlled based on the approximate actual fluctuation locus, the output of the generator can be appropriately controlled to a predetermined output value. That is, when controlling the output of the generator based on the actual fluctuation locus that is the same as or close to the change parameter indicating the output change, the output state before the actual fluctuation locus is different from the output state before the output change. The output does not change according to the actual fluctuation locus, and a control delay or the like occurs.

  On the other hand, in the present invention, the actual fluctuation trajectory is the same or approximate to the change parameter, and the output state before the actual fluctuation trajectory is based on the actual fluctuation trajectory that is the same or approximate to the output state before the output change. Since the output is controlled, the output changes according to the actual variation locus (or approximates the actual variation locus), and control delay or the like can be prevented or suppressed. In addition, according to the first aspect of the present invention, since the system appropriately controls the output of the generator to a predetermined output value, the driver does not need to manually set and adjust the command value to the generator. Not only can the labor be remarkably reduced, but also variations in control accuracy and instability by the driver can be reduced.

  According to the second aspect of the present invention, not only the linear / linear change but also the output of the generator is controlled along the calculated actual fluctuation locus, that is, the past results / results. Since the curve is flexibly and flexibly controlled along the actual fluctuation locus, it is possible to more appropriately control the output of the generator.

It is a schematic block diagram which shows the automatic electric power feeding system containing the generator control system which concerns on embodiment of this invention. It is a figure which shows an example of the output locus memorize | stored in the output database of the generator control system of FIG. It is a figure which shows an example of an actual fluctuation locus | trajectory like a quadratic curve in the output locus | trajectory which concerns on embodiment of this invention. It is a flowchart which shows the effect | action of the generator control system of FIG. It is a figure which shows an example of the output change display line obtained by embodiment of this invention and the experimental measurement in the past. It is a figure which shows an example of the actual fluctuation locus | trajectory in embodiment of this invention, and the output change display line in the past.

  The present invention will be described below based on the illustrated embodiments.

  FIG. 1 is a schematic configuration diagram showing an automatic power feeding system 10 including a generator control system 1 according to an embodiment of the present invention. The automatic power supply system 10 is a system that controls the generator 12 so as to have an appropriate output / power generation amount corresponding to the electric power demand that changes from moment to moment. In this system, the generator 12 is controlled so that the output of the generator 12 becomes a predetermined output value. Here, the generator 12 includes all generators such as a thermal power generator, a hydroelectric generator, or a nuclear power generator, and the control by the automatic power feeding system 10 is performed for each generator 12.

  The automatic power supply system 10 includes a function for calculating and calculating a power demand amount in real time, a power supply management unit 11 that calculates and manages an appropriate power supply amount, and the power supply management unit 11 includes a power generation amount by a generator 12. Is sent in real time. And in the electric power feeding management part 11, when the calculated electric power demand amount and the electric power generation amount from the generator 12 are always compared, and it is not the appropriate electric power generation amount (equivalent to an electric power demand amount) according to an electric power demand amount, Calculate how the power generation should be changed. For example, a change parameter for increasing the power generation amount from the current value of 100 MW to 150 MW is calculated, and this change parameter is transmitted to the central processing unit 2 described later of the generator control system 1.

  Here, as a function for calculating the power demand in real time, the power demand is obtained by subtracting the total power to be transmitted to and received from other adjacent power companies from the total output of all the generators 12 operated by the power company. Or the amount of power used by each consumer may be measured and summed to calculate the amount of power demand.

  The generator control system 1 mainly includes a central processing unit 2, an output database (storage unit) 3, an indexing unit (indexing unit) 4, and a control unit (control unit) 5.

  The central processing unit 2 is a calculation unit that mainly controls the output database 3, the indexing unit 4, and the control unit 5, and the power generation amount from the generator 12 is sent in real time. When the power generation amount from the generator 12 is received, output trajectories as described later are sequentially stored and accumulated in the output database 3 based on the power generation amount, and when the change parameter is received from the power supply management unit 11, as will be described later. Thus, the indexing unit 4 and the control unit 5 are activated.

  The output database 3 is a database that stores past actual output trajectories of the generator 12 and output change lines obtained by experimental measurement. That is, as shown in FIG. 2, an output trajectory T indicating the past actual output state of the generator 12 in time series is stored, and the latest output is always stored in real time in this output trajectory. Further, the output change indicating line obtained by the experimental measurement is, for example, an output change indicating line L1 as shown in FIG. 5. In this case, from a state where the output is stable at 100 MW, from 100 MW to 150 M It changes linearly in 5 minutes, and the generator output change rate is 10 MW / min, and a plurality of such output change indicating lines are stored.

  Here, in the output trajectory T as shown in FIG. 2, the trajectory portions in the state where the output of the generator 12 fluctuates are assumed to be actual fluctuation trajectories TC1 to TC4. In this embodiment, although not shown in FIG. 2, it is assumed that an actual fluctuation locus TC5 as shown in FIG. This actual fluctuation locus TC5 shows a case where the output state before being raised from 100 MW to 150 MW is lowered from an output higher than 150 MW to 100 MW.

  When the change parameter is transmitted and input to the central processing unit 2, the indexing unit 4 receives an activation command from the central processing unit 2 and outputs a predetermined actual variation trajectory as a trace target trajectory. This is a task to be determined (searched) from the trajectory T. Here, the trace target trajectory is an actual fluctuation trajectory of an ascending or descending amount that is the same as or close to the increasing or decreasing amount of the change parameter, and the output state before this actual changing trajectory is output by the change parameter. This is an actual fluctuation locus that is the same as or close to the output state before the change is made.

  Specifically, the change parameter is to increase the power generation amount from 100 MW to 150 MW, and the time point when the output change is made by the change parameter, that is, the current time point is time t1 in FIG. In this case, first, an actual fluctuation locus in which the power generation amount increases from 100 MW to 150 MW is determined. As a result, the actual fluctuation trajectories TC1 and TC5 are determined. Next, an actual fluctuation trajectory in which the output state before the actual fluctuation trajectories TC1 and TC5 is equivalent to the output state before the current time t1 is determined from the actual fluctuation trajectories TC1 and TC5. That is, the direction in which the output drops from an output higher than 150 MW to 100 MW before the actual fluctuation locus TC1 or TC5 is determined. As a result, the actual fluctuation trajectory TC5 is determined as the trace target trajectory.

  In this way, an actual fluctuation locus in which the output state before and after the change to be performed and the output state before and after the past fluctuation are both the same or approximate is determined. Here, in this embodiment, the time point at which the output change by the change parameter is performed is the current time point, and the time point to be calculated is the time point at which the output change is performed. You may make it perform.

  Further, when the actual variation trajectory as described above cannot be determined, for example, when the output state before the actual variation trajectory is not equal to the output state before the current variation trajectory, it is stored in the output database 3. From the output change lines obtained from the experimental measurement, the output change lines with the same change parameter and output change (such as increase or decrease) are determined.

  The control unit 5 controls the output of the generator 12 based on the actual fluctuation trajectory calculated by the indexing unit 4, and the generator 12 is controlled so as to follow the calculated actual fluctuation trajectory. The output is controlled. That is, for example, when the above-mentioned actual fluctuation locus TC5 is calculated by the indexing unit 4, the output does not change for the first minute and the output rises from 100 MW to 150 M in 5 minutes. The machine 12 is controlled by sending an output increase command (control command) of 10 MW / min. Alternatively, since the output increases from 100 MW to 150 M in 6 minutes, an output increase command of 8.3 MW / min is sent to the generator 12 for control.

  As shown in FIG. 3, when the actual fluctuation locus TC6 calculated by the indexing unit 4 changes in a quadratic curve, a quadratic output increase command is given to the generator 12. To control. In this way, the output of the generator 12 is controlled so as to follow the calculated actual fluctuation locus. Similarly, when the output change indicator obtained by the test measurement is determined by the indexing unit 4, an output change command (control command) is transmitted to the generator 12 based on the output change indicator. To do. For example, when an output change indicating line L1 as shown in FIG. 5 is determined, an output increase command of 10 MW / min is transmitted to the generator 12.

  Next, the generator control method by the generator control system 1 having such a configuration will be described.

  First, as shown in FIG. 4, when the power generation amount by the generator 12 is received (step S1), a new power generation amount is added to the output locus by the central processing unit 2 and stored in the output database 3 (step S1). S2). As long as the output of the generator 12 is not changed (as long as it is “N” in step S3), such power generation amount is repeatedly received and stored in real time, and output loci are sequentially accumulated.

  In such a state, it becomes necessary to change the output of the generator 12 in order to obtain an appropriate power generation amount according to the power demand, and when a change parameter is received from the power supply management unit 11 ("Y" in step S3) In the case of (1), the indexing unit 4 is activated, and the trace target locus is determined (step S4). As a result, as described above, when a trace target trajectory that is equivalent to the amount of increase or decrease of the change parameter and whose output state before the actual fluctuation trajectory is equivalent to the output state immediately before the current time is determined (step In the case of “Y” in S5, an output change command along the trace target locus is transmitted from the control unit 5 to the generator 12 (step S6). For example, when the actual fluctuation trajectory TC5 as described above is determined as the trace target trajectory, an output increase command of 8.3 MW / min or the like is transmitted to the generator 12.

  On the other hand, if the trace target trajectory is not determined (in the case of “N” in step S5), the change parameter and the output change (such as an increase amount and a decrease amount) are equivalent by the indexing unit 4 as described above. An output change indicating line is determined from the output database 3, and an output change command based on the output change indicating line is transmitted from the control unit 5 to the generator 12 (step S7). For example, when the output change indicating line L1 as described above is determined, an output increase command of 10 MW / min is transmitted to the generator 12.

  Upon receiving such an output change command, the output of the generator 12 changes, and at the same time, the reception and storage of the amount of power generation is repeatedly performed in the same manner as described above (steps S1 and S2). The output trajectory after the change is sequentially accumulated. As a result, a new actual fluctuation locus / measured value is accumulated, and becomes an indexing target of the indexing unit 4 when the output is next changed. In this way, by repeating the output change and the accumulation of the actual fluctuation trajectory thereby, a more appropriate actual fluctuation trajectory (trace target trajectory) is determined in the indexing unit 4, and the control accuracy for the generator 12 is increased ( Control delays are eliminated). For example, even if a change parameter is received in a certain output state, and output control is performed based on the output change line obtained by experimental measurement, the equivalent change parameter in the next equivalent output state. In the case of receiving, the trace target trajectory is determined, so that the generator 12 is controlled more appropriately and with high accuracy.

  As described above, according to the generator control system 1 and the control method, the actual fluctuation locus is equivalent to the amount of increase or decrease of the change parameter, and the output state before this actual variation locus is the output state immediately before the current time. Is calculated, and the output of the generator 12 is controlled based on the trace target locus. That is, since the output is controlled based on the trace target trajectory that has the same state before and after the change / change and has a track record in the past, the output changes according to the trajectory (or approximates the trajectory). As a result, a control delay or the like is prevented / suppressed, and the output of the generator 12 can be appropriately controlled to a predetermined output value.

  Moreover, since the output of the generator 12 is flexibly controlled not only in a linear change but also in a curved change so as to follow the determined trace object trace, the output of the generator 12 is more appropriate. It becomes possible to control to. Further, since the system 1 appropriately controls the output of the generator 12 to a predetermined output value, the driver does not need to manually set and adjust the command value to the generator 12. As a result, the labor is remarkably reduced, the control is performed quickly and not only the work efficiency is improved, but also the control accuracy variation and instability by the driver can be reduced. It becomes possible to reduce wear and deterioration of the speed machine and the like.

  Although the embodiment of the present invention has been described above, the specific configuration is not limited to the above embodiment, and even if there is a design change or the like without departing from the gist of the present invention, Included in the invention. For example, in the above-described embodiment, the generator 12 is automatically controlled by the generator control system 1, but may be performed manually. That is, when the output of the generator 12 is changed, the trace target trajectory as described above is determined from the output trajectory stored in the output database 3 or the like, and the command value is manually transmitted to the generator 12 based on the trace target trajectory. You may make it set with.

  Further, the actual variation trajectory to be indexed as the trace target trajectory is not only one actual variation trajectory (each TC1 to TC6, etc.) but also a continuous actual variation trajectory (trajectory including a plurality of TC1 to TC6, etc.). May be. That is, the present invention can also be applied to change parameters such as changing the output from output A to output B and then changing the output from output B to output C after a certain time. Furthermore, in the above embodiment, the generator control system 1 is incorporated in the automatic power feeding system 10, but the generator control system 1 may be incorporated in other systems, or may be configured independently. That is, not only when controlling to an appropriate power generation amount corresponding to the power demand, the output of the generator 12 can be appropriately controlled to a predetermined value by the generator control system 1.

DESCRIPTION OF SYMBOLS 1 Generator control system 2 Central processing part 3 Output database (storage means)
4 indexing section (indexing means)
5 Control unit (control means)
DESCRIPTION OF SYMBOLS 10 Automatic power supply system 11 Power supply management part 12 Generator T, L2 Output locus TC1-TC6 Actual fluctuation locus L1 Output change line

Claims (3)

Storage means for storing a past output trajectory of the generator;
Among the output trajectories, the output trajectory in a state where the output of the generator is fluctuating is an actual fluctuation trajectory,
When a change parameter indicating how to change the output of the generator is input, the output of the generator is an actual fluctuation locus that is the same as or approximates to the change parameter and before the actual fluctuation locus. Indexing means for determining from the output trajectory of the storage means an actual fluctuation trajectory that is the same as or approximated to the output state of the generator before the state undergoes output change by the change parameter;
Control means for controlling the output of the generator based on the actual fluctuation trajectory determined by the indexing means;
A generator control system comprising: The control means controls the output of the generator so as to follow the actual fluctuation locus determined by the indexing means.
The generator control system according to claim 1. Memorize the past output trajectory of the generator,
Among the output trajectories, the output trajectory in a state where the output of the generator is fluctuating is an actual fluctuation trajectory,
An actual variation locus that is the same as or close to a variation parameter that indicates how to change the output of the generator, and the output state of the generator before the actual variation locus changes the output according to the variation parameter. An actual fluctuation locus that is the same as or close to the output state of the previous generator is determined from the stored output locus,
Control the output of the generator based on the calculated actual fluctuation locus,
The generator control method characterized by the above-mentioned.

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