JP2009142107A - Power feeding system, and method of controlling the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To control for appropriate balance between supply and demand by accurately understanding response characteristics when performing supply and demand control with a power generation facility from a power feeding commanding station. <P>SOLUTION: A power feeding system includes a power feeding commanding device 20 and a power generator control device 30 which connects to the power feeding commanding device 20 through a communication means 4 for telecommunication. The power feeding commanding device 20 generates a command value and calculates a transmission delay time. The generated command value passes a low pass filter having such time constant as corresponds to the transmission delay time. The command value which has passed the low pass filter is transmitted to the power generator control device 30 by the communication means. The power generator control device 30 controls a generator 40 based on the received command value. The time constant of the low pass filter is so set that a difference between the time with which the command value transmitted by the power feeding commanding device 20 is applied and the time the command value is actually applied in the power generator control device 30 comes to be minimum. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a power feeding system and a method for controlling the power feeding system, and more particularly to a technique for appropriately controlling a supply and demand balance in consideration of a transmission delay between a power feeding command device and a power generation facility.

In order to maintain an appropriate balance between power supply and demand, a power supply command device is installed at a power supply command engine such as a central power supply command station, and demand is predicted at the power supply command engine. The supply and demand balance is ensured by transmitting to the power generation facility (see, for example, Patent Document 1).
Japanese Patent Application No. 2004-31426

  By the way, there is a transmission delay in the communication means connecting the power supply command device of the power supply command engine and the power generation equipment. For this reason, the command value transmitted from the power feeding command device is not necessarily applied to the power generation facility at the scheduled time.

  An example is shown in FIG. The horizontal axis of the graph shown in the figure is time (hour: minute: second), and the vertical axis is the command value (MW). The solid line is the waveform of the command value transmitted from the power supply command device, and the broken line is the waveform of the command value received by the power generation facility. As shown in the figure, the power generation facility receives the command value transmitted from the power supply command device with a delay of the transmission delay time, and the command value is applied to the power generation facility with a delay from the time when it should be applied. It becomes. In addition, a time zone in which the command value transmitted from the power supply command device and the command value received by the power generation facility change in opposite phases also occurs, and in such a case, appropriate control of the supply and demand balance is greatly hindered.

  In recent years, power generation technologies such as improving the efficiency of small-scale power generation facilities such as distributed power sources, grid connection technologies between power generation facilities and commercial systems using power electronics technologies, and monitoring, control and maintenance technologies using IT-related technologies As a result of these developments, power systems and power generation systems are diversifying. In particular, in a microgrid performed using a distributed power source or the like, a case where a communication means such as the Internet whose communication speed is not always stable is assumed. For this reason, a technique for appropriately controlling the power generation equipment in consideration of the transmission delay of the communication means is inevitable.

  The present invention has been made in view of such a background, and a power feeding system capable of appropriately controlling the supply-demand balance in consideration of a transmission delay between the power feeding command device and the power generation facility, and control of the power feeding system It aims to provide a method.

  The invention described in claim 1 for achieving the above object is a power supply command device that generates a command value for controlling a generator, and a power generation control that is communicably connected to the power supply command device via a communication means. The power supply command device includes a command value generation unit that generates the command value, and the generated command value according to a transmission delay time in the communication unit. A filter processing unit that passes through a low-pass filter having a constant, and a command value transmission unit that transmits a command value after passing through the low-pass filter to the power generation control device by the communication unit, the power generation control device, A command value receiving unit that receives the command value and a generator control unit that controls the generator based on the received command value are provided.

  Further, the invention according to claim 2 is the power supply system according to claim 1, wherein the power supply command device further includes a transmission delay time calculation unit for calculating a transmission delay time in the communication means.

  According to a third aspect of the present invention, in the power feeding system according to the first aspect, the time constant of the low-pass filter includes the command value generated by the power feeding command device, and the command value is the power generation control. The power generation control device is set to a value that minimizes the difference from the command value that is actually applied at the time to be applied in the device.

  According to a fourth aspect of the present invention, there is provided the power feeding system according to the second aspect, wherein the command value transmitting unit of the power feeding commanding device adds the command value to the time stamp T1 indicating a transmission time. The communication means further includes means for transmitting to the power generation control device, the power generation control device acquiring a power generator output from the power generator, a power generator output acquisition unit, and acquiring the acquired power generator output from the command. A generator output transmission unit that adds the time stamp T1 added to the value and transmits it to the power supply command device by the communication means, and the power supply command device receives the generator output. A power output value receiving unit; and a time stamp T2 generating unit that generates a time stamp T2 indicating a reception time when the generator output value receiving unit receives the generator output. The transmission delay time calculation unit of the commanding device includes means for calculating the transmission delay time based on the time stamp T1 added to the received generator output and the generated time stamp T2. .

  Further, the invention according to claim 5 is the power feeding system according to claim 4, wherein the transmission delay time calculation unit obtains the transmission delay time by calculating (T2-T1) / 2. To do.

  The invention according to claim 6 is the power supply system according to claim 2, wherein the command value transmission unit of the power supply command device adds the command value to the time stamp T1 indicating a transmission time. The power generation control device further includes means for transmitting to the power generation control device by the communication means, and the power generation control device generates a time stamp T3 indicating the reception time when the generator control unit receives the command value. A generator output acquisition unit that acquires a generator output from the generator, and the acquired generator output is added to the command value by adding the time stamp T1 and the time stamp T3. A generator output transmitter for transmitting to the power supply command device by communication means, and the power supply command device further includes a generator output value receiver for receiving the generator output. The transmission delay time calculation unit of the power supply command device calculates the transmission delay time in the communication unit based on the time stamp T1 and the time stamp T3 added to the received generator output. It has a means to do.

  The invention according to claim 7 is the power feeding system according to claim 6, wherein the transmission delay time calculation unit calculates the transmission delay time by calculating T3−T1.

  Further, the invention according to claim 8 is the power supply system according to claim 6, wherein the power supply command device is a time stamp indicating a reception time when the generator output value receiving unit receives the generator output. It further includes a time stamp T2 generation unit that generates T2, and the transmission delay time calculation unit obtains the transmission delay time by calculating T2-T3.

  The invention according to claim 9 includes a power supply command device that generates a command value for controlling the generator, and a power generation control device that is communicably connected to the power supply command device via communication means. A method for controlling the power feeding system, wherein the power feeding command device generates the command value, calculates a transmission delay time in the communication means, and generates the command value as the transmission delay time. Passing through the low-pass filter having a time constant according to the step, transmitting the command value after passing through the low-pass filter to the power generation control device by the communication means, and the power generation control device A step of receiving, and a step of controlling the generator based on the received command value.

  According to the present invention, it is possible to appropriately control the supply and demand balance in consideration of the transmission delay between the power supply command device and the power generation equipment.

  Hereinafter, one embodiment of the present invention will be described in detail.

[Example 1]
FIG. 1 shows a schematic configuration of a power feeding system 1 described as a first embodiment. As shown in the figure, the power feeding system 1 is installed in a power feeding command device 20 installed in a power feeding command engine 2 such as a central power feeding command station, and in a power generation facility 3 such as a power plant. The power generation control device 30 that is communicably connected to the power supply command device 20 via the power generator and the generator 40 that is communicably connected to the power generation control device 30 via the second communication means 5 are configured.

  The first communication means 4 is, for example, a dedicated line (power system control information transmission system (CDT: Cyclic Digital data Transmission equipment, metal line, optical fiber, etc.), the Internet, or the like. The second communication means 5 is, for example, a LAN or a dedicated line (metal line, optical fiber).

  FIG. 2 shows a hardware configuration of the power supply command device 20. The power supply command device 20 is an information processing device such as a mainframe, a workstation, or a personal computer. As shown in the figure, the power supply command device 20 includes a CPU 21, a memory 22 such as a RAM / ROM, a large-capacity storage device 23 such as a hard disk, and a keyboard and a mouse that are components of an operation console in the power supply command engine 2. Input device 24, display device 25 such as a liquid crystal display used as a monitoring control console, communication device 26 which is a communication interface for communicating with power generation control device 30 by first communication means 4, time information such as current time ( A timer 27 for generating a (time stamp) and a DSP (Digital Signal Processor) for performing digital signal processing.

  Note that the power supply command device 20 is not limited to the case where the power supply command device 20 is configured using only one information processing device having the hardware illustrated in FIG. 2, and is configured by a plurality of information processing devices connected to be communicable. It may be.

  FIG. 3 shows a hardware configuration of the power generation control device 30. As shown in the figure, the power generation control device 30 includes a CPU 31, a memory 32 such as a RAM / ROM, a first communication device 33, which is a communication interface for communicating with the power supply command device 20 through the first communication means 4, and a second communication device. The communication unit 5 includes a second communication device 34 that is a communication interface for communicating with the generator 40, and a timer 35 that generates time information (time stamp) such as the current time.

  FIG. 4 shows functions of the power supply command device 20. The function shown in the figure is realized by the function of the hardware of the power supply command device 20 or when the CPU 21 executes a program stored in the memory 22 or the storage device 23.

  In the figure, the generator output value receiving unit 211 receives the generator output value sent from the generator control device 30 by the first communication means 4 and stores it in the generator output value storage unit 212. Further, the generator output value reception unit 211 notifies the time stamp T2 generation unit 213 that a generator output value to which a time stamp T1 described later is added has been received. The generator output value receiving unit 211 inputs the time stamp T1 added to the received generator output value to the transmission delay time calculating unit 214.

  The time stamp T2 generating unit 213 generates a time stamp T2 indicating the time when the generator output value receiving unit 211 receives the generator output value.

  The transmission delay time calculation unit 214 is based on the time stamp T2 generated by the time stamp T2 generation unit 213 and the time stamp T1 added to the generator output value received by the generator output value reception unit 211. 1 The transmission delay time of the communication means 4 is obtained, and the obtained transmission delay time is input to the command value generation unit 217 and the time constant setting unit 223.

  The frequency acquisition unit 215 acquires a time-series measurement value of the frequency of the power system connected to the generator 40 supplied from the frequency measuring device 50 installed in the power supply command engine 2 or the like, and acquires the acquired measurement. The value is stored in the frequency measurement value storage unit 216 in association with the time when the measurement value is acquired.

  The command value generation unit 217 is based on the information stored in the generator output value storage unit 212, the information stored in the frequency measurement value storage unit 216, and the transmission delay time input from the transmission delay time calculation unit 214. Then, the command value schedule for the generator output control to be transmitted to the generator control device 30 is generated, and the generated schedule is stored in the command value schedule storage unit 218.

  Although not shown in FIG. 4, the command value generation unit 217 includes the command value history transmitted to the generator control device 30, the demand history, the economic load to be borne by the generator 40, etc. A schedule of command values is generated by appropriately using other information.

  The command value acquisition unit 219 acquires a command value schedule every predetermined period (for example, every 10 seconds) stored in the command value schedule storage unit 218.

The filter processing unit 222 performs a filtering process on the command value schedule acquired by the command value acquisition unit 219 and converts the command value schedule. Here, the filtering process refers to a command delay (command value C ₁ ) in a command value schedule (command value change with respect to time change) as a transmission delay time calculated by the transmission delay time calculation unit 214. This is a process of passing through a first-order lag low-pass filter (transfer function: 1 / (1 + TS)) having a time constant T that is determined in accordance with the time constant T. Note that the function of the low-pass filter is realized, for example, by the CPU 21 executing a program or by performing digital signal processing by the DSP 28.

The time constant setting unit 223 sets the time constant T according to the transmission delay time given from the transmission delay time calculation unit 214 and gives it to the filter processing unit 222. The time constant setting unit 223 uses the time constant T as the command value C ₁ generated by the power supply command device 20 and the command value (which the power generation control device 30 actually applies at the time when the command value C ₁ is to be applied ( hereinafter, the difference referred to as a command value C _2.) is set to be minimized. The contents of “applied” include, for example, that the generator control device 30 has received a command value, and that the generator control device 30 has started control of the generator 40 in accordance with the received command value (power generation The control command is transmitted from the machine control device 30 to the generator 40).

A process related to the setting of the time constant T by the time constant setting unit 223 will be specifically described. The time constant setting unit 223 stores the result of simulation by changing the transmission delay time and the time constant T of the low-pass filter. Examples thereof are shown in Tables 1 to 6. In these tables, σ ₁ is a standard deviation of a difference between the command value C ₁ and the command value C ₂ at each of a plurality of times (t _{1 to} t _n ) within a predetermined period Δt when the low-pass filter is not passed. is there. Further, σ ₂ is a standard deviation of the difference between the command value C ₁ and the command value C ₂ at a plurality of times (t _{1 to} t _n ) within a predetermined period Δt when passing through the low-pass filter (next) (See equation (1)).

また改善率σ及び改善率ＡＢＳは、それぞれ次式（３），（４）式から求まる値である。

ABS ₁ is an average of absolute values of differences between the command value C ₁ and the command value C ₂ at a plurality of times (t _{1 to} t _n ) within a predetermined period Δt when the low-pass filter is not passed. The ABS2 is in each of a plurality of times in a predetermined time period Δt when passed through a low-pass filter _(t 1 _{~t n),} is the average of the absolute value of the difference between the command value C ₁ and the command value C ₂ (following (See equation (2)).

The improvement rate σ and the improvement rate ABS are values obtained from the following equations (3) and (4), respectively.

  The time constant setting unit 223 shown in FIG. 4 sets the time constant T of the low-pass filter based on Tables 1 to 6, for example, from the improvement rate σ as follows. For example, when the transmission delay time calculated by the transmission delay time calculation unit 214 is 10 seconds, the time constant T of the low-pass filter is used in Table 1, and the absolute value of the improvement rate σ is the maximum (improvement) in the same table. The rate σ = −3.6%) is set to 10 seconds. When the transmission delay time is 20 seconds, the time constant T of the low-pass filter is set to 70 seconds using the time constant T of the low-pass filter when the absolute value of the improvement rate σ is maximum (improvement rate σ = 1−14.7%). Set to. Similarly, when the transmission delay time calculated by the transmission delay time calculation unit 214 is 30 seconds, the time constant T of the low-pass filter is set to 105 seconds, and when the transmission delay time is 40 seconds, the time constant of the low-pass filter is set. When T is 100 seconds, the transmission delay time is 50 seconds, the low-pass filter time constant T is 100 seconds, and when the transmission delay time is 60 seconds, the low-pass filter time constant T is 90 seconds. Set each.

  The time constant setting unit 223 sets the time constant T of the low-pass filter from the improvement rate ABS, for example, as follows based on Tables 1 to 6. For example, when the transmission delay time calculated by the transmission delay time calculation unit 214 is 10 seconds, the time constant T of the low-pass filter is used in Table 1, and the absolute value of the improvement rate ABS is maximized (improvement) in the same table. The rate ABS = −4.4%) is set to 10 seconds. If the transmission delay time is 20 seconds, the time constant T of the low-pass filter is set to 70 seconds with the absolute value of the improvement rate ABS being maximized (improvement rate ABS = 13.8%) using Table 2. Set to. Similarly, when the transmission delay time calculated by the transmission delay time calculation unit 214 is 30 seconds, the time constant T of the low-pass filter is set to 105 seconds, and when the transmission delay time is 40 seconds, the time constant of the low-pass filter is set. When T is 100 seconds, the transmission delay time is 50 seconds, the low-pass filter time constant T is 100 seconds, and when the transmission delay time is 60 seconds, the low-pass filter time constant T is 120 seconds. Set each.

In this way, the time constant setting unit 223 sets the time constant of the low-pass filter to a value that maximizes the improvement rate (the improvement rate σ or the improvement rate ABS), so that the command value C ₁ and the command value C _{2 are set.} It is possible to reliably reduce the difference.

  The time constant T of the low-pass filter may be determined using either the improvement rate σ or the improvement rate ABS. As in Table 6, the value of the time constant T may be different between the case of using the improvement rate σ and the case of using the improvement rate ABS. In short, the demand balance depends on the characteristics of the power supply system. What is necessary is just to select the method ensured reliably.

Rate of improvement, if based on the difference between the command value C ₁ and the command value C _2, may be other than the improvement σ or improvement ABS. For example, the root mean square (RMS) of the difference between the command value C ₁ and the command value C ₂ at each time within the predetermined period Δt may be used as the improvement rate.

As is apparent from Tables 1 to 6, the values of the improvement rate σ and the improvement rate ABS are negative values in both cases, and the command value C ₁ and the command value C ₂ are passed by passing through the low-pass filter. The difference is shrinking. That is, by transmitting the command value to the generator control device 30 after passing through the low-pass filter, the difference between the command value C ₁ and the command value C ₂ caused by the transmission delay in the first communication unit 4 is reduced, and power feeding is performed. a command value C ₁ generated in the command unit 20, the command value C ₁ is applied in the command value C ₂ is actually the power generation control device 30 close to the command value C ₁ in the time to be applied in the power generation control device 30 It becomes like this.

Note that, as described above, by passing the low-pass filter, the difference between the command value C ₁ and the command value C ₂ is reduced, the short-period fluctuation component of the command value C ₁ by passing, for example a low pass filter There is removed, it is considered the case is to reduce to be controlled by a command value of the reverse phase in the command value C _2.

  As a reference, the command value waveform (solid line) that does not pass through the low-pass filter of the filter processing unit 222 in FIG. 10, and the command value that the power generation control device 30 receives when the command value is transmitted without passing through the low-pass filter. An example of a waveform (dashed line) and a waveform of a command value (a dashed line) received by the power generation control device 30 when the command value of the solid line is transmitted through a low-pass filter is shown. In the figure, the horizontal axis represents time (hour: minute: second), and the vertical axis represents the command value (MW).

  The command value transmission unit 220 illustrated in FIG. 4 transmits the command value to the generator control device 30 by the first communication unit 4 at the timing specified in the schedule according to the schedule of the command value acquired by the command value acquisition unit 219. . At this time, the command value transmission unit 220 adds the current time generated by the time stamp T1 generation unit 221 (hereinafter referred to as time stamp T1) to the command value to be transmitted (for example, transmitted at each timing). A time stamp T1 is added to the packet (in which the command value is described)).

  FIG. 5 shows functions of the power generation control device 30. The function shown in the figure is realized by the function of the hardware itself of the power generation control device 30 or when the CPU 31 executes a program stored in the memory 22 or the storage device 23.

  In the figure, when receiving a command value transmitted from the power supply command device 20, the command value receiving unit 311 inputs the received command value to the generator control unit 312. The time stamp T1 added to the received command value is input to the time stamp T1 acquisition unit 313. The time stamp T1 acquisition unit 313 inputs the time stamp T1 acquired from the command value reception unit 311 to the generator output value transmission unit 315.

  The generator control unit 312 controls the output of the generator 40 according to the command value input from the command value receiving unit 311. The generator 40 has a function of measuring the output of the generator in real time in addition to the function of controlling the output in accordance with the control performed by the generator control unit 312. The generator output value acquisition unit 314 includes: The generator output output from the generator 40 is received and input to the generator output value transmission unit 315.

  The generator output value transmission unit 315 transmits the generator output value input from the generator output value acquisition unit 314 to the power supply command device 20 via the first communication unit 4. At the time of this transmission, the generator output value transmission unit 315 adds the time stamp T1 input from the time stamp T1 acquisition unit 313 to the generator output value to be transmitted.

  Next, processing performed by the power supply system 1 of this embodiment will be described with reference to the flowchart shown in FIG.

First, the command value acquisition unit 219 of the power supply command device 20 acquires a command value schedule from the command value schedule storage unit 218 (S610).
Next, the filter processing unit 222 passes the schedule of command values acquired by the command value acquisition unit 219 through the low-pass filter (S611). Note that the time constant setting unit 223 appropriately updates the time constant T of the low-pass filter employed by the filter processing unit 222 at this time according to the transmission delay time given from the transmission delay time calculation unit 214.

Next, the command value transmission unit 220 generates a command value added with the time stamp T1 of the current time, which is generated by the time stamp T1 generation unit 221 according to the schedule of the command value after passing through the low pass filter in the filter processing unit 222. Then, it is transmitted to the generator control device 20 by the first communication means 4 (S612, S613).
In the generator control device 30, the command value receiving unit 311 receives the command value sent from the power supply control device 20 (S614).
Next, the command value receiving unit 311 inputs the received command value to the generator control unit 312. Thereby, the generator control part 312 starts output control of the generator 40 according to the input command value (S615).

On the other hand, at the start of the control, the generator output value acquisition unit 314 acquires the generator output value sent from the generator 40 and inputs the acquired generator output value to the generator output value transmission unit 315. (S616). The generator output value transmission unit 315 adds the time stamp T1 input from the time stamp T1 acquisition unit 313 to the generator output value input from the generator output value acquisition unit 314 (S617), and first communication means. 4, the generator output value is transmitted to the power supply command device 20 (S618).
The generator output value reception unit 211 of the power supply command device 20 receives the generator output value to which the time stamp T1 is added, which is sent from the power generation control device 30 (S619).

When receiving the generator output value, the generator output value receiving unit 211 of the power supply command device 20 stores the generator output value in the generator output value storage unit 212 in association with the time stamp T1 added to the received generator output value. The generator output value reception unit 211 inputs the time stamp T1 added to the received generator output value to the transmission delay time calculation unit 214. Further, the generator output value receiving unit 211 notifies the time stamp T2 generation unit 213 that the generator output value to which the time stamp T1 has been added has been received (S620).
Upon receiving the notification, the time stamp T2 generation unit 213 generates a time stamp T2 indicating the reception time of the generator output value, and inputs the generated time stamp T2 to the transmission delay time calculation unit 214 (S621).

  When the time stamp T2 is input, the transmission delay time calculating unit 214 performs the first communication based on the time stamp T2 and the time stamp T1 attached to the generator output value received by the generator output value receiving unit 211. The transmission delay time of means 4 is obtained. Specifically, the transmission delay time calculation unit 214 calculates the transmission delay time by calculating (T2−T1) / 2. Then, the transmission delay time calculation unit 214 inputs the obtained transmission delay time to the command value generation unit 217 (S622).

  Next, the command value generation unit 217 includes information stored in the generator output value storage unit 212, information stored in the frequency measurement value storage unit 216, and transmission delay time input from the transmission delay time calculation unit 214. The command value schedule for the generator output control to be transmitted to the generator control device 30 is generated based on, and the generated schedule is stored in the command value schedule storage unit 218 (S623).

  As described above, in the power supply system 1 of the present embodiment, the time stamp T1 indicating the transmission time when the command value is transmitted from the power supply command device 20 to the generator control device 30 by the first communication unit 4. Is added. Further, the generator control device 30 transmits the generator output value with the time stamp T1 added to the received command value from the generator control device 30 to the power supply command device 20 by the first communication means 4. The power supply command device 20 generates a time stamp T2 corresponding to the reception time of the generator output value, and sets the transmission delay time based on the generated time stamp T2 and the time stamp T1 added to the generator output value. Ask.

  As described above, according to the power feeding system 1 of the present embodiment, transmission is performed by a simple mechanism in which a time stamp is added to the command value and the generator output value communicated between the power feeding command device 20 and the power generation control device 30. The delay time can be grasped.

  In addition, since the time stamp T1 is added to the generator output value received by the power supply command device 20 from the power generation control device 30, the power generator command value in the power supply command device 20 is a response to the command value transmitted to the time stamp T1. I know that there is. For this reason, the power supply command device 20 can accurately know the relationship between the command value and the generator output, that is, the response characteristic.

  Moreover, since the power supply system 1 of the present embodiment generates a command value schedule based on the accurate transmission delay time grasped by the above mechanism, it is possible to appropriately control the supply and demand balance.

[Example 2]
Next, the power feeding system 1 according to the second embodiment will be described. The schematic configuration of the power supply system 1 described as the second embodiment, the hardware configuration of the power supply command device 20, and the hardware configuration of the power generation control device 30 are the same as those of the power supply system 1 of the first embodiment described with reference to FIGS. Same as the case.

  FIG. 7 shows the function of the power supply command device 20 in the power supply system 1 of the present embodiment. Unlike the first embodiment, the generator output value receiving unit 211 of the power supply command device 20 of this embodiment is added to the generator output value together with the generator output value sent from the generator control device 30. The time stamp T1 and the time stamp T3 are received. The generator output value receiving unit 211 inputs the received time stamp T1 and time stamp T3 to the transmission delay time calculating unit 214.

  The transmission delay time calculation unit 214 obtains the transmission delay time of the first communication unit 4 based on the input time stamp T1 and time stamp T3 and the time stamp T2 input from the type stamp generation unit 213. The transmission delay time is input to the command value generation unit 217.

  FIG. 8 shows functions of the power generation control device 30 in the power supply system 1 of the present embodiment. In addition to the function of the power generation control device 30 of the first embodiment, the command value reception unit 311 of the power generation control device 30 of the second embodiment generates a time stamp T3 generation unit that generates a time stamp T3 that is information indicating the reception time of the command value. 316. In addition, when the command value receiving unit 311 receives the command value transmitted from the power supply commanding device 20, the command value receiving unit 311 inputs the received command value to the generator control unit 312, and the time stamp T1 added to the received command value is received. The time stamp T1 acquisition unit 313 is input, and the time stamp T3 generation unit 316 is notified that the command value has been received.

  When notified that the command value has been received, the time stamp T3 generation unit 316 generates a time stamp T3 indicating the reception time, and inputs the generated time stamp T3 to the generator output value transmission unit 315.

  The generator output value transmission unit 315 transmits the generator output value input from the generator output value acquisition unit 314 to the power supply command device 20 via the first communication unit 4. In this transmission, the generator output value transmission unit 315 adds the time stamp T1 input from the time stamp T1 acquisition unit 313 and T3 input from the time stamp T3 to the generator output value to be transmitted.

  Next, processing performed by the power supply system 1 of this embodiment will be described with reference to the flowchart shown in FIG.

First, the command value acquisition unit 219 of the power supply command device 20 acquires a command value schedule from the command value schedule storage unit 218 (S910).
Next, the filter processing unit 222 allows the command value schedule acquired by the command value acquisition unit 219 to pass through the low-pass filter (S911). Note that the time constant setting unit 223 appropriately updates the time constant T of the low-pass filter employed by the filter processing unit 222 at this time according to the transmission delay time given from the transmission delay time calculation unit 214.

Next, the command value transmission unit 220 generates a command value added with the time stamp T1 of the current time, which is generated by the time stamp T1 generation unit 221 according to the schedule of the command value after passing through the low pass filter in the filter processing unit 222. Then, the first communication means 4 transmits it to the generator control device 20 (S912, S913).
In the generator control device 30, the command value receiving unit 311 receives the command value sent from the power supply control device 20 (S914).
Next, the command value receiving unit 311 inputs the received command value to the generator control unit 312. Thus, the generator control unit 312 starts output control of the generator 40 according to the input command value (S915).

On the other hand, at the start of the control, the generator output value acquisition unit 314 acquires the generator output value sent from the generator 40 and inputs the acquired generator output value to the generator output value transmission unit 315. (S916). The generator output value transmission unit 315 adds the time stamp T1 input from the time stamp T1 acquisition unit 313 to the generator output value input from the generator output value acquisition unit 314 (S917), and the time stamp T3. The time stamp T3 generated by the generation unit 316 is added (S918). And the generator output value transmission part 315 transmits a generator output value to the electric power feeding instruction | command apparatus 20 by the 1st communication means 4 (S919).
The generator output value receiving unit 211 of the power supply command device 20 receives the generator output value to which the time stamp T1 and the time stamp T3 are added sent from the power generation control device 30 (S920).

  When the generator output value receiving unit 211 of the power supply command device 20 receives the generator output value to which the time stamp T1 is added, the generator output value is associated with the time stamp T1 added to the received generator output value. Store in the value storage unit 212. Further, the generator output value receiving unit 211 inputs the time stamp T1 and the time stamp T3 added to the received generator output value to the transmission delay time calculating unit 214 (S921).

  The transmission delay time calculation unit 214 obtains the transmission delay time of the first communication unit 4 based on the input time stamp T1 and time stamp T3 and the time stamp T2 input from the type stamp generation unit 213, and first The transmission delay time of the communication means 4 is obtained. Specifically, the transmission delay time calculation unit 214 obtains the transmission delay time for the forward path by calculating T3-T1, and calculates the transmission delay time for the return path by calculating T2-T3 (S922). The forward and backward transmission delay times are input to the command value generation unit 217 (S923).

  Next, the command value generation unit 217 includes information stored in the generator output value storage unit 212, information stored in the frequency measurement value storage unit 216, and forward and return routes input from the transmission delay time calculation unit 214. Based on this transmission delay time, a command value schedule for output control of the generator to be transmitted to the generator control device 30 is generated, and the generated schedule is stored in the command value schedule storage unit 218 (S923).

  As described above, in the power supply system 1 of the present embodiment, the time stamp T1 indicating the transmission time when the command value is transmitted from the power supply command device 20 to the generator control device 30 by the first communication unit 4. Is added. Further, the generator control device 30 generates a time stamp T3 indicating the time when the command value is received, and sets the time stamp T1 added to the received command value and the generator output value added with the time stamp T3 as the first value. The data is transmitted from the generator control device 30 to the power supply command device 20 by the communication means 4. Then, the power supply command device 20 calculates T3-T1 for the transmission delay time of the forward path based on the time stamp T1 and time stamp T3 added to the generator output value and the time stamp T2 generation unit 213. Further, the return transmission delay time is obtained by calculating T2-T3.

  Thus, according to the power supply system 1 of the present embodiment, by a simple mechanism of adding a time stamp to the command value and the generator output value communicated between the power supply command device 20 and the power generation control device 30, It is possible to accurately grasp the transmission delay time of the forward path and the backward path. As described above, since the accurate transmission delay times for the forward path and the backward path can be grasped individually, the configuration of the present embodiment is particularly suitable when the first communication means 4 has a large difference between the upstream and downstream communication times, such as ADSL. It is effective for.

  Moreover, since the power feeding system 1 of the present embodiment generates the time stamp T3 indicating the reception time when the command value is received on the power generation control device 30 side, it accurately grasps the time when the generator output is acquired. Can do. For this reason, it is possible to accurately know the relationship between the command value and the generator output, that is, the response characteristic.

  Moreover, since the power supply system 1 of the present embodiment generates a command value schedule based on the accurate transmission delay time grasped by the above mechanism, it is possible to appropriately control the supply and demand balance.

  In addition, the description of the above embodiment is for facilitating understanding of the present invention, and does not limit the present invention. It goes without saying that the present invention can be changed and improved without departing from the gist thereof, and that the present invention includes equivalents thereof.

1 is a diagram illustrating a schematic configuration of a power feeding system 1 described as a first embodiment. FIG. 2 is a diagram illustrating a hardware configuration of a power supply command device 20 described as a first embodiment. 1 is a diagram illustrating a hardware configuration of a power generation control device 30 described as a first embodiment. It is a figure which shows the function of the electric power feeding instruction | command apparatus 20 demonstrated as Example 1. FIG. It is a figure which shows the function of the electric power generation control apparatus 30 demonstrated as Example 1. FIG. 3 is a flowchart illustrating processing performed by the power supply system 1 described as the first embodiment. It is a figure which shows the function of the electric power feeding instruction | command apparatus 20 demonstrated as Example 2. FIG. It is a figure which shows the function of the electric power generation control apparatus 30 demonstrated as Example 2. FIG. 10 is a flowchart illustrating processing performed by the power supply system 1 described as a second embodiment. It is a figure which shows an example of the waveform of command value. It is a figure which shows an example of the waveform of command value.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Power supply system 2 Power supply instruction | command engine 3 Power generation facility 4 1st communication means 5 2nd communication means 211 Generator output value receiving part 212 Generator output value memory | storage part 213 Time stamp T2 production | generation part 214 Transmission delay time calculation part 215 Frequency acquisition part 216 Frequency measurement value storage unit 217 Command value generation unit 218 Command value schedule storage unit 219 Command value acquisition unit 220 Command value transmission unit 221 Time stamp T1 generation unit 222 Filter processing unit 223 Time constant setting unit 311 Command value reception unit 312 Generator Control unit 313 Time stamp T1 acquisition unit 314 Generator output value acquisition unit 315 Generator output value transmission unit 316 Time stamp T3 generation unit

Claims (9)

A power supply command device for generating a command value for controlling the generator;
A power supply system configured to include the power supply command device and a power generation control device that is communicably connected via a communication unit,
The power supply command device
A command value generator for generating the command value;
A filter processing unit that passes the generated command value through a low-pass filter having a time constant according to a transmission delay time in the communication unit;
A command value transmission unit that transmits the command value after passing through the low-pass filter to the power generation control device by the communication means;
The power generation control device
A command value receiving unit for receiving the command value;
And a generator control unit that controls the generator based on the received command value. The power supply system according to claim 1,
The power supply system further includes a transmission delay time calculation unit that calculates a transmission delay time in the communication unit. The power supply system according to claim 1,
The time constant of the low-pass filter is the command value generated in the power supply command device and the command value to which the power generation control device is actually applied at the time when the command value is to be applied in the power generation control device. A power supply system that is set to a value that minimizes the difference. The power supply system according to claim 2,
The command value transmission unit of the power supply command device is
The command value further includes means for adding a time stamp T1 indicating a transmission time and transmitting the command value to the power generation control device by the communication means,
The power generation control device
A generator output acquisition unit for acquiring a generator output from the generator;
A generator output transmission unit that transmits the acquired generator output to the power supply command device by adding the time stamp T1 added to the command value by the communication means; and
The power supply command device
A generator output value receiving unit for receiving the generator output;
When the generator output value receiving unit receives the generator output, the generator output value receiving unit further includes a time stamp T2 generating unit that generates a time stamp T2 indicating the reception time,
The transmission delay time calculation unit of the power supply command device is
A power supply system comprising: means for calculating the transmission delay time based on the time stamp T1 added to the received generator output and the generated time stamp T2. The power supply system according to claim 4,
The transmission delay time calculating unit obtains the transmission delay time by calculating (T2-T1) / 2. The power supply system according to claim 2,
The command value transmission unit of the power supply command device is
The command value further includes means for adding a time stamp T1 indicating a transmission time and transmitting the command value to the power generation control device by the communication means,
The power generation control device
A time stamp T3 generating unit that generates a time stamp T3 indicating a reception time when the generator control unit receives the command value;
A generator output acquisition unit for acquiring a generator output from the generator;
A generator output transmission unit for transmitting the acquired generator output to the power supply command device by the communication means by adding the time stamp T1 and the time stamp T3 added to the command value; ,
The power supply command device
A generator output value receiving unit for receiving the generator output;
The transmission delay time calculation unit of the power supply command device is
A power supply system comprising: means for calculating the transmission delay time in the communication means based on the time stamp T1 and the time stamp T3 added to the received generator output. The power supply system according to claim 6,
The transmission delay time calculating unit obtains the transmission delay time by calculating T3-T1. The power supply system according to claim 6,
The power supply command device
When the generator output value receiving unit receives the generator output, the generator output value receiving unit further includes a time stamp T2 generating unit that generates a time stamp T2 indicating the reception time,
The transmission delay time calculating unit obtains the transmission delay time by calculating T2-T3. A power supply command device for generating a command value for controlling the generator;
A power supply system control method comprising the power supply command device and a power generation control device that is communicably connected via a communication means,
The power supply command device is
Generating the command value;
Calculating a transmission delay time in the communication means;
Passing the generated command value through a low-pass filter having a time constant according to the transmission delay time;
Transmitting the command value after passing through the low-pass filter to the power generation control device by the communication means;
The power generation control device is
Receiving the command value;
And a step of controlling a generator based on the received command value.

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