JP2020018145A - Power supply method and power supply system - Google Patents

Abstract

To provide a power supply method suitable for dealing with a case where the electricity generated by using renewable energy may be excessively supplied.SOLUTION: An adjustment electric supply section 9 adjusts the output prior to electricity generation using renewable energy, in priority electric supply rule. An operation part 21 calculates a reduction adjustment force indicating a spare that a control section 27 can be adjusted by the adjustment electric supply section 9. The control section 27 can minimize execution of output control for electricity generation using renewable energy, by evaluating the electric energy that can be subjected to output adjustment prior to electricity generation using renewable energy, with reference to the reduction adjustment force.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a power supply method and the like in a power supply system.

  Patent Literature 1 describes that a central power supply command center distributes loads evenly to each power plant. Patent Document 2 discloses that a storage battery is incorporated in an uncertain distributed power supply.

JP 2012-5237 A JP 2011-97664 A

  The central power supply command center issues a command to each power plant (see Patent Document 1). Currently, businesses that use renewable energy (such as solar power and wind power, which can be used permanently as an energy source) have their output set manually by the operator by the day. Something you are doing. For this reason, the Central Power Distribution Center will present the renewable energy generation plan to the business operator in advance (eg, the day before), and the business will generate power in accordance with the renewable power generation plan. However, the power generation using renewable energy is different from the renewable power generation plan due to the fact that the amount of solar radiation on the day differs from the predicted value. At present, there is no mechanism in place for the Central Power Dispatch Center to utilize a system to adjust the output on the day of power generation using renewable energy.

  Patent Literature 2 describes that a problem associated with large-scale introduction of power generation using renewable energy is to be solved by introducing a storage battery. However, power generation using renewable energies is increasing rapidly and cannot cope.

  Therefore, an object of the present invention is to provide a power supply method or the like that contributes to determination of adjusting output on the day of power generation using renewable energy.

  A first aspect of the present invention is a power supply method in a power supply system, wherein the power supply system includes a control unit, a calculation unit, a prediction unit, a display unit, a renewable power generation unit, and an adjustment power supply unit. The renewable power generation means supplies power generated using renewable energy, and the adjustment power supply means supplies power unlike the renewable power generation means and regulates the power supplied by the control means. A power generation step in which the renewable power generation means generates power using renewable energy; and a prediction in which the prediction means obtains a predicted value of a power generation amount generated by the renewable power generation means and a predicted value of demand power. A calculating step for calculating, using the predicted value of the power generation amount and the predicted value of the demanded power, the control means calculates a downward adjustment force indicating an adjustable range using the adjustment power supply means. When, the display means comprises a display step of displaying a reduced adjustment force calculated in said calculation step.

  A second invention according to the present invention is the power supply method according to the first aspect, wherein in the power generation step, the renewable power generation unit performs power generation using renewable energy according to a renewable power generation plan, and the display step includes: The display means displays the reduction force calculated in the calculation step, and at one or more times at present and in the future, the planned value of the power generation amount in the renewable power generation plan and the prediction means And / or a difference between a predicted value of the power demand in the renewable power generation plan and a predicted value of the power demand predicted by the prediction unit.

  A third aspect of the present invention is the power supply method according to the first or second aspect, wherein the renewable power generating means includes first renewable power generating means capable of giving an instruction from the control means, The energy generating means includes a direct first renewable power generating means and an indirect first renewable power generating means, and the indirect power generating time at which the indirect first renewable power generating means starts generating power in accordance with the command is the direct first power generating time. After the direct power generation time at which the renewable power generation means starts power generation in accordance with the command, in the calculation step, the calculation means performs the direct first renewable power generation after the direct power generation time has elapsed from the command assumed time. In accordance with the lowering adjustment force referring to the power generation amount according to the command by the means and the command by the direct first renewable power generation means and the indirect first renewable power generation means after the indirect power generation time has elapsed from the command assumed time. The amount of power generated Calculating the lowered adjustment force, and in the display step, the display means is configured to refer to a power generation amount in accordance with a command from the direct first renewable power generation means after a lapse of the direct power generation time from the command assumed time. And a decrease adjusting force with reference to a power generation amount according to a command from the direct first renewable power generation unit and the indirect first renewable power generation unit after the indirect power generation time has elapsed from the command assumed time.

  A fourth aspect of the present invention is the power supply method according to any one of the first to third aspects, wherein the renewable power generation means is capable of issuing a command after starting power generation according to a renewable power generation plan. Including power generation means, the control means, when the lowering adjustment force is lower than a first reference value, notifies the first renewable power generation means of an output restriction command, When the output is limited and / or when the lowering adjustment force is higher than a second reference value, the control unit notifies the first renewable power generation unit of an output restart command to output the renewable power. Including a command step to increase the output more than planned.

  According to a fifth aspect of the present invention, in the power supply method according to the fourth aspect, in the commanding step, the calculating means converts the first reference value and / or the second reference value into a power demand prediction value. And / or using the actual value.

  A sixth aspect of the present invention is the power supply method according to the fourth or fifth aspect, wherein the central power supply command station includes the control means, the general control station includes a general control station server, , The control means notifies the general control center server of a command to adjust output, and the general control center server notifies the first renewable power generation means of a schedule according to the command. I do.

  A seventh aspect of the present invention is the power supply method according to any one of the fourth to sixth aspects, wherein the monitoring means included in the power supply system outputs the power in accordance with the command from the first renewable power generation means. And a monitoring step of monitoring whether the operation is performed.

  An eighth aspect of the present invention is the power supply method according to any one of the fourth to seventh aspects, wherein the first renewable power generation unit includes a plurality of renewable power plants, and the output is performed in the instruction step. When the restriction command is notified, a part of the plurality of renewable power plants is limited in output, and a part of the renewable power plants in which the output is restricted has a record in which the output has been restricted so far. And / or using the power generation situation.

  A ninth aspect of the present invention is the power supply method according to any one of the first to eighth aspects, wherein, in the calculating step, the calculating means includes: an amount of power supplied by the adjustment power supply means; The lowering adjustment force is calculated using the minimum power supply amount that is the minimum power supply amount of the power supply unit.

  A tenth aspect of the present invention is the power supply method according to the ninth aspect, wherein the adjustment power supply unit includes a plurality of unit power supply units, and in the calculation step, the calculation unit includes a power supply unit for each of the unit power supply units. The minimum power supply amount is obtained using a unit minimum power supply amount that is the minimum power supply amount.

  An eleventh aspect of the present invention is a power supply system, comprising a control unit, a calculation unit, a prediction unit, a renewable power generation unit, and an adjustment power supply unit, wherein the renewable power generation unit supplies renewable energy. The electric power generated by using the power supply, the adjustment power supply means, unlike the renewable power generation means, supplies power, can adjust the power supplied by the control means, the renewable power generation means, the renewable energy The power generation is performed using the renewable energy, and after the power generation using the renewable energy is started, the predicted value of the power generation amount generated by the renewable power generation device and the predicted value of the demand power are obtained. However, using the predicted value of the power generation amount and the predicted value of the demanded power, the control unit calculates a downward adjustment force indicating an adjustable range using the adjustment power supply unit.

  Note that, in the eighth aspect, the renewable power plants whose output is restricted are, for example, counting the number of outputs whose power is restricted for each renewable power plant, and selecting from those having a smaller count. Is also good. Here, if the monitoring means detects a renewable power plant that does not comply with the command, the renewable power plant does not count up, and may be in a state where it is likely to be selected as a renewable power plant whose output is limited due to a small count. Good. By making such a selection, fair adjustment can be realized. In addition, it is possible to realize effective output adjustment by grasping information, for example, the transmission line is stopped, and not performing output adjustment for such renewable power plants. it can.

  In contrast to power generation using renewable energy, some renewable power plants (power plants using renewable energy) can adjust output on the day. However, at other renewable power plants, the output could not be adjusted on the day, and the output was adjusted in advance. For this reason, at present, the output adjustment for all renewable power plants is performed only by the renewable power generation plan without using the mechanism for adjusting the output on the day.

  According to each aspect of the present invention, power generation using renewable energy is evaluated by evaluating the amount of power that can be adjusted by the central power supply dispatcher and the like prior to power generation using renewable energy as “lower adjustment power”. It is no longer necessary to excessively limit the output adjustment to the renewable power generation plan even at the pre-renewable power generation planning stage, and it is possible to increase the output if necessary. Can be minimized.

  It should be noted that the problem of excessive supply of renewable energy can occur at each level such as the country, region, and home. For example, at the home level, a lowering adjustment force can be used to adjust the output of solar power generation. At the national level, for example, when managing a plurality of central power supply dispatching stations, the power that can be adjusted at each central power dispatching station and the power that can be adjusted among the central power dispatching stations are calculated and adjusted to reduce the power. be able to.

It is a block diagram showing an example of composition of a feed system concerning an example of the present invention. FIG. 2 is a flowchart illustrating an example of an operation of the power supply system 1 in FIG. 1. FIG. 2A is a diagram illustrating an example of an excessive supply power, and FIG. 2B is a diagram illustrating an example of a prediction process performed by a prediction unit 23 in FIG. It is a figure for demonstrating the example of a display of the display part 25 of FIG. 1, (a) The example of a display according to a renewable energy generation plan, (b) The example of a display when it becomes lower than a 1st reference value, (c) 7A is a display example when the value is higher than the second reference value, and FIG. 6D is an actual display example.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The embodiments of the present invention are not limited to the following examples.

  FIG. 1 is a block diagram illustrating an example of a configuration of a power supply system 1 according to an embodiment of the present invention. The power supply system 1 includes a command device 3, a general control center server 5 (an example of a “general control center server” in the present application), a schedule distribution server 7 (an example of a “schedule distribution server” in the present application), The adjustment power supply unit 9 (an example of the “adjustment power supply unit” in the present application), the direct first renewable power generation unit 11 (an example of the “direct first renewable power generation unit” in the present application), and the indirect first renewable power generation unit It includes an energy generating unit 13 (an example of an “indirect first renewable power generating unit” in the present application) and a second renewable power generating unit 15 (an example of a “second renewable power generating unit” in the present application).

  Hereinafter, the “first renewable power generation unit” refers to the direct first renewable power generation unit 11 and the indirect first renewable power generation unit 13. The “renewable power generation unit” refers to the first renewable power generation unit and the second renewable power generation unit 15. The “power generation unit” refers to the adjustment power supply unit 9, the first renewable power generation unit, and the second renewable power generation unit 15.

  The central power supply command center includes a command device 3. The command device 3 controls the power generation unit. According to the priority power supply rules set by the government, first, measures such as suppressing the output of thermal power and utilizing pumping power are used, and if the supply capacity is still excessive, power generation using renewable energy Output control is to be performed.

  The adjustment power supply unit 9 is configured to make adjustment before the power generation using the renewable energy by the command device 3 in the priority power supply rule. For example, it is a generator or a pumped generator that is previously secured as an adjusting force by the command device 3.

  The renewable power generation unit supplies power generated by using renewable energy (for example, sunlight or wind power) in response to power demand. The command device 3 presents the renewable power generation unit to the renewable power generation unit by the day before, as before. The renewable power generation unit generates power in accordance with the renewable power generation plan in principle. In the present embodiment, a photovoltaic power generation will be described as an example.

  There are various types of power generation companies that use renewable energy. Previously, for example, only manually adjusting the output in the morning of the day according to the renewable energy generation plan presented by the previous day, the central power supply dispatcher could not adjust the output according to the situation on the day (Refer to the second renewable power generation unit 15). On the other hand, as a device, a device capable of instructing output adjustment by a central power supply command station after presenting a renewable power generation plan has been introduced (see the first renewable power generation unit). However, at present, the impact of power generation using renewable energy is only increasing, and the impact is small at this time. The output is adjusted only by the energy generation plan, and the possibility of output adjustment on the day is being recognized.

  The first renewable power generation unit can issue an instruction to correct the renewable power generation plan after the command device 3 presents the renewable power generation plan (for example, on the day), and can operate in accordance with the instruction.

  The first renewable power generation unit 11 can give a schedule (power generation schedule) in which the command device 3 follows the instruction via the integrated control center server 5. On the other hand, the indirect first renewable power generation unit 13 distributes the schedule to the schedule distribution server via the integrated control center server 5 by the command device 3, and the indirect first renewable power generation unit 13 accesses the schedule distribution server. Can tell the schedule according to the instruction. Therefore, when the command device 3 notifies the command, after the direct power generation time has elapsed, the direct first renewable power generation unit starts power generation in accordance with the command, and the indirect first renewable power generation unit 13 (for example, a periodic power source). Indirectly, the indirect first renewable power generation means starts power generation after the access indirect power generation time has elapsed. The indirect power generation time is later than the direct power generation time.

  After starting power generation in accordance with the renewable energy power generation plan, the second renewable power generation unit 15 cannot notify the command from the command device 3 and correct the power generation status.

  The command device 3 includes an operation unit 21 (an example of an “operation unit” in the claims of the present application), a prediction unit 23 (an example of an “estimation unit” in the claims of the application), and a display unit 25 (an example of the “display unit” in the claims of the application). ), A monitoring unit 26 (an example of a “monitoring unit” in the present application), and a control unit 27 (an example of a “control unit” in the present application).

  The general control center includes a general control center server 5. The general control center server 5 and the schedule distribution server 7 may be provided for each region, for example, such as prefectures and municipalities. The second renewable power generation unit 15 will be described with respect to an example in which the command device 3 gives an instruction via the general control center server 5, but the command may be directly given from the command device 3; 5 and the schedule distribution server 7.

  FIG. 2 is a flowchart showing an example of the operation of the power supply system 1 of FIG. FIG. 3 shows (a) an example of excessive supply power and (b) an example of a prediction process by the prediction unit 23 in FIG. FIG. 4 is a diagram for explaining a display example of the display unit 25 of FIG.

  By the day before, the prediction unit 23 predicts the amount of power generated by the renewable power generation unit to generate solar power using the weather forecast and the like for the next day, and the calculation unit 21 uses the predicted value of the power generation amount to calculate the time. Along with the sequence, room for adjustment (down adjustment force) by the adjustment power supply unit 9 at each time of the next day is calculated (step ST1), and a renewable power generation plan for the renewable power generation unit is created (step ST2). The control unit 27 presents a renewable power generation plan to the renewable power generation unit (step ST3).

An example of the lowering adjustment force will be described. For simplicity, power generation means such as nuclear power is omitted, power storage and the like are omitted, and power generation by the adjustment power supply unit 9 and the first renewable power generation unit is assumed. At time t, the lowering adjustment force is set to La (t), and the power demand is set to Pd (t). The amount of power supplied by the adjustment power supply unit 9 is Pa ₁ (t), and the minimum power is Pa ₂ (t). The amount of power generated by the first renewable power generation unit is assumed to be Pr (t). The amount of power that can be supplied is Pa ₁ (t) + Pr (t). This is consistent with power demand. That is,
Pd (t) = Pa ₁ (t) + Pr (t)
It is. On the other hand, the amount of power by the adjusting power supply unit 9 can be adjusted only up to the minimum power Pa ₂ (t). Therefore, the lowering adjustment force La (t) at time t is
_{La (t) = Pa 1 (} t) -Pa 2 (t)
= Pd (t) -Pr (t ) -Pa 2 (t)
Can be calculated as

  According to this formula, when the power demand Pd (t) decreases or the power generation amount Pr (t) of the first renewable power generation unit increases as compared with the renewable power generation plan, the adjusting power is lower than the renewable power generation plan. As a result, there is less room for adjustment using the adjustment power supply unit 9. By restricting the output of the first renewable power generation unit on the day, the lowering adjustment force can be increased.

  On the other hand, if the power demand Pd (t) increases or the power generation amount Pr (t) of the first renewable power generation unit decreases as compared with the renewable power generation plan, the adjustment power becomes lower than the renewable power generation plan. Thus, room for adjustment using the adjustment power supply unit 9 is increased. Therefore, on the day, the output of the first renewable power generation unit may be restarted, and the lowering adjustment force may be reduced.

In practice, the adjustment power supply unit 9 includes, for example, a plurality of thermal power plants, and the minimum power generation amount differs for each thermal power plant. Therefore, processing such as obtaining Pa ₂ (t) in accordance with each power plant included in the adjustment power supply unit 9 is performed. Further, as shown in FIG. 3A, the lowering adjustment force can be calculated by referring to the power generation by the second renewable power generation unit 15, other power generation such as nuclear power, pumped-storage power generation, and the like.

  According to the present invention, the renewable energy power generation plan up to the previous day can be corrected on the same day by using the lowering adjustment force. Therefore, it is not necessary to create a renewable energy power generation plan conservatively (that is, in a state where an unnecessary limit is added). There is no longer any need to limit renewable energy generation more than necessary as a plan according to the forecast.

  Until now, the share of renewable energy in electricity demand has been small. For this reason, the amount of power generated by renewable energy was predicted in the next day's weather forecast, and even if there were some fluctuations, the power supply by the entire system could be continued by adjusting the command device 3.

FIG. 3A is an example showing a recent power generation situation. Generator A ₁ nuclear etc., in addition to the power generation A ₂ of thermal, etc., there is a power generation A _3, A ₄ and A ₅ using renewable energy. To the power demand A _6, etc. it is used pumped storage A ₇ and A _8, which maintains the balance of supply and demand. However, in order to power generation using the renewable energy increases, the balance of supply and demand be utilized pumping power and battery charging A ₄ is Torezu, A ₅ is in the oversupply.

  Thus, in recent years, the ratio of power generation using renewable energy to power demand has increased rapidly. Therefore, it is expected that output control will be required for power generation using renewable energy.

  The present invention realizes control that makes use of the characteristics of power generation using renewable energy in accordance with the priority power supply rule by considering the lowering adjustment power.

  Subsequently, the control of the day will be described with reference to step ST4 and subsequent steps in FIG. The renewable power generation unit generates power using renewable energy in accordance with the renewable power generation plan (step ST4).

  The prediction unit 23 periodically obtains a predicted value of the amount of power generated by the renewable power generation unit using, for example, a weather forecast and the power generation results of the renewable power generation unit. Further, a predicted value of the power demand is obtained using, for example, a weather forecast or past power demand (step ST5). FIG. 3B shows the predicted value (broken line) of the power generation amount predicted on the previous day, the actual value up to the present (left side of the current time), and the power generation predicted by the prediction unit 23 periodically, which is displayed on the display unit 25. It is a figure which shows the predicted value of a quantity (right side of the present time).

  The calculation unit 21 calculates the first reference value, the second reference value, and the lowering adjustment force at each time (step ST6).

  The first reference value is used as a criterion for determining whether to reduce the output of the renewable power generation unit. The second reference value is a criterion for determining whether to increase the output of the renewable power generation unit. The first reference value is lower than the second reference value. The calculation unit 21 calculates the first reference value and the second reference value according to the predicted value of the power demand, such as 1% of the predicted value of the power demand at each time.

  As the first reference value and the second reference value, 1% of the actual value of the current power demand may be used. Alternatively, a constant value may be used. In this case, a lowering adjustment force is calculated in step ST6.

  The control unit 27 compares the lowering adjustment force with the first reference value at each time (step ST7). If the lowering adjustment force is not lower than the first reference value at each time, the process proceeds to step ST9. If there is a time when the lowering adjustment force is lower than the first reference value, the time at which the first renewable power generation unit should give a command to limit the power generation at that time is determined. Then, after giving the instruction, the power generation amount when the first renewable power generation unit directly restricts the power generation at the direct power generation time and the power generation when the indirect first renewable power generation unit restricts the power generation at the indirect power generation time Calculate the amount. Then, at each time point, the lowering adjustment force with reference to these power generation amounts is calculated (step ST8), and the process proceeds to step ST11.

  In step ST9, the control unit 27 compares the lowering adjustment force with the second reference value at each time in a time period in which the amount of power generated by the renewable power generation unit increases. If the lowering adjustment force is not higher than the second reference value, the process proceeds to step ST11. If there is a time when the lowering adjustment force is higher than the second reference value, a time at which the first renewable power generation unit should instruct a command to restart power generation is determined at that time. Then, after giving the instruction, the power generation amount when the first renewable power generation unit restarts power generation at the direct power generation time and the power generation when the indirect first renewable power generation unit restarts power generation at the indirect power generation time Calculate the amount. Then, at each time point, the restart reduction adjusting force with reference to these power generation amounts is calculated (step ST10). Then, the process proceeds to step ST11.

  In step ST11, the display unit 25 displays the lowering adjustment force. The display unit 25 predicts the difference between the planned value of the power generation amount in the renewable power generation plan and the predicted value of the power generation amount predicted by the prediction unit 23, and the predicted value of the power demand in the renewable power generation plan and the prediction unit 23. Displays the difference from the predicted value of power demand.

  FIG. 4 shows an example of a display on the display unit 25. (A) shows an example in which the planned value matches the predicted value.

Display area C ₁ shows the difference between the predicted value of the power generation quantity generation amount of planned value and the prediction unit 23 predicts the renewable energy power generation planning. The predicted value is larger than the planned value when the mark is above, and the predicted value is smaller than the planned value when the mark is below.

Display region C ₂ indicates the difference between the predicted value of the power demand planning value prediction unit 23 of the power demand is predicted in renewable energy power generation planning. The predicted value is larger than the planned value when the mark is above, and the predicted value is smaller than the planned value when the mark is below.

In the display areas C ₁ and C ₂ , the actual value of the power generation amount and the power demand may be compared with the plan value, respectively.

C ₃ shows the lowering adjustment force over time, the first reference value C ₄₂ and the second reference value C _41. The lowering adjustment force with time is shown at 11:00, 11:30, 12:00, 12:30, 13:00, 13:30 and 14:00. In FIG. 4A, the lowering adjustment force is above the first reference value, and there is room for sufficient adjustment. Further, in a time zone in which power generation using renewable energy is performed, the power is lower than the second reference value and the output is not unnecessarily limited.

As described above, at least the power generation amount and the power demand of the renewable power generation unit fluctuate the lowering adjustment power. The display area C ₃ can grasp the variation of the lowering adjustment force can be further by the display area C ₁ and C _2, to grasp the amount of power generation and power demand is a factor of the variation of the lower adjustment force.

4 (b) is a display example when the lowering adjustment force becomes prediction below the first reference value C _42. In this example, the 13:30 or later, lowered adjustment force is expected to fall below the first reference value C _42. In FIG. 4 (b), by displaying the △ mark under the earliest time at which 13:30 lowering adjusting force, after this time, in the prediction of lowering adjusting force is below the first reference value C ₄₂ It indicates that there is. Here, referring to the display areas C ₁ and C ₂ , the power demand has the planned value and the predicted value coincide with each other, whereas the power generation amount has the predicted value higher than the planned value. Therefore, it can be inferred that the power generation amount of the renewable energy power generation unit is a factor that reduces the adjustment power. Then, an arrow is displayed on the display of the lowering adjustment force at 12:00 to indicate that a command should be notified at 12:00 at the latest at 13:30 in order to increase the lowering adjustment force. Then, by displaying the difference when the adjustment is made on the bar graph of the reduction adjustment force when no adjustment is made, the limit reduction adjustment force (increases by limiting the power generation of the first renewable power generation unit). Lowering adjustment force) is displayed. In other words, at 12:30 and 13:00, the first renewable power generation unit directly limits the power generation and increases the downward adjustment power. Further, at 13:30 and 14:00, the indirect first renewable energy power generation unit limits the power generation, and the lowering adjustment power further increases.

Figure 4 (c) is a display example when the lowering adjustment force becomes predicted to exceed the second reference value C _41. In this example, the 13:30 after a prediction lowering adjustment force exceeds a second reference value C _41. Figure 4 (c), the by displaying the △ mark under the earliest time at which 13:30 lowering adjusting force, after this time, in the prediction of lowering adjustment force exceeds a second reference value C ₄₁ It indicates that there is. Here, referring to the display areas C ₁ and C ₂ , the generated value matches the planned value and the predicted value, whereas the predicted value of the power demand is higher than the planned value. Therefore, it can be guessed that the power demand is a factor that increases the adjustment power. Then, an arrow is displayed on the display of the lowering adjustment force at 12:00 to indicate that a command should be sent at 12:00 at the latest at 13:30 to reduce the lowering adjustment force. Then, the difference in the case where the adjustment is made is displayed above the bar graph of the lowering adjustment force in the case where the adjustment is not made, so that the restarting lowering adjustment force (to be reduced by restarting the power generation of the first renewable power generation unit). Lowering adjustment force) is displayed. That is, at 12:30 and 13:00, the first renewable power generation unit directly restarts power generation, and the lowering adjustment power decreases. Furthermore, at 13:30 and 14:00, the indirect first renewable energy power generation unit resumed power generation, and the lowering adjustment power was further reduced.

  Note that the lowering adjustment force generally increases in a time zone such as nighttime, early morning, or evening when the influence of solar power generation is small. Therefore, the comparison between the lowering adjustment force and the second reference value may be performed during a time period in which the influence of the photovoltaic power generation increases, for example, from 9:00 to 15:00.

  FIG. 4D shows an actual display example using the first reference value.

  Referring to FIG. 2, control unit 27 issues a command in response to an operation such as pressing of a command button by an operator (step ST12). When giving a command, the process proceeds to step ST13. If no command is issued, the process proceeds to step ST14.

  In step ST12, for example, the control unit 27 may compare the lowering adjustment force with the first reference value and / or the second reference value at each time to determine whether to issue a command.

  In step ST13, first, a case will be described where the control unit 27 notifies the general control center server 5 of an output restriction command by designating the amount of power to be restricted. The general control center server 5 that has received the output restriction command restricts a part or all of the power generation permitted in the renewable power generation plan by using the generated power amount to be restricted, and schedules the first renewable power generation unit. create. The created schedule is transmitted directly to the first renewable power generation unit 11. On the other hand, a direct schedule cannot be transmitted to the indirect first renewable power generation unit 13. Therefore, the schedule of the indirect first renewable power generation unit 13 is transmitted to the schedule distribution server 7, and the indirect first renewable power generation unit 13 periodically checks the schedule distribution server 7 and receives the schedule. The first renewable power generation unit generates power according to a schedule.

  The case where the control unit 27 notifies the integrated control center server 5 of the output restart instruction by designating the increasing amount of power will be described. The general control center server 5 that has received the output restart command restarts a part or all of the power generation restricted in the renewable power generation plan by using the increased power generation amount, and sets the schedule of the first renewable power generation unit. create. The created schedule is transmitted directly to the first renewable power generation unit 11. On the other hand, the schedule of the indirect first renewable power generation unit 13 is transmitted to the schedule distribution server 7, and the indirect first renewable energy generation unit 13 periodically checks the schedule distribution server 7 and receives the schedule. The first renewable power generation unit generates power according to a schedule.

  In step ST14, it is determined whether or not that day has elapsed. If not, the process returns to step ST5. If the day has passed, the process ends.

  The monitoring unit 26 monitors whether the first renewable power generation unit is generating power according to the schedule. If there is a first renewable power generation unit that does not perform power generation according to the schedule, for example, in addition to giving a penalty, this should be reflected in the prediction by the prediction unit 23, the calculation of the lowering adjustment force by the calculation unit 21, and the like. Can be.

  In step ST13, the processing by the integrated control center server 5 will be supplemented by an explanation. For example, the required control amount is apportioned according to the equipment amount of each section, and further, the distribution center is redistributed according to the equipment amount of each power distribution establishment. Then, a business operator (renewable energy power plant) in the power distribution business area is selected. The first renewable power generation unit includes a plurality of renewable power plants. When the renewable power plant whose output is limited or restarted by the integrated control station server 5 is a part of them, the fairness of the selection is ensured, and further, the responsibility for explaining the state to the outside is ensured. It is important to fulfill.

  For example, the number of times that the output is limited for each renewable power station is counted. Thus, for example, the fairness can be explained by comparing the minimum number of times and the maximum number of times, for example, to a state not exceeding twice. Furthermore, when restricting the output, the renewable power plants for which the output is restricted are preferentially selected from those with smaller counts. Thereby, it is possible to prevent the number of times the output is restricted from being biased. When the monitoring unit 26 detects a renewable power station that does not generate power according to the schedule for limiting the output, the count of the renewable power station is maintained without increasing. Then, the renewable power station is usually selected as a target to be continuously output-limited next time. Therefore, a penalty for the renewable energy power plant that does not adhere to the output restriction is obtained, and fairness can be secured.

  When the output is restarted, for example, in consideration of fairness, the output is restarted uniformly (for example, 20%) for all the businesses of the first renewable power generation unit. In other words, if only a part is selected and restarted because it is determined by the balance between power demand and solar power generation, for example, when the amount of solar power generation is large, the operator permitted to restart The reason is that fairness cannot be ensured by businesses that have been allowed to restart.

  In addition, the integrated control station server 5 keeps track of information such as, for example, transmission lines being stopped for each renewable power station, and does not perform output adjustment for such renewable power stations. By doing so, effective output adjustment can be realized. Here, a photovoltaic power generator or a company that cannot receive a schedule due to a line failure or the like can perform power generation itself. Therefore, for example, by setting and controlling a schedule without output control by itself, power generation can be prevented from being stopped even when a communication failure occurs.

  DESCRIPTION OF SYMBOLS 1 Power supply system, 3 command devices, 5 general control center server, 7 schedule distribution server, 9 adjustment power supply unit, 11 direct 1st renewable power generation unit, 13 indirect 1st renewable power generation unit, 15 2nd renewable power generation unit, 21 arithmetic unit, 23 prediction unit, 25 display unit, 26 monitoring unit, 27 control unit

Claims (11)

A power supply method in a power supply system,
The power supply system includes a control unit, a calculation unit, a prediction unit, a display unit, a renewable power generation unit, and an adjustment power supply unit,
The renewable power generation means supplies power generated using renewable energy,
The adjustment power supply means, unlike the renewable power generation means, supplies power, and can adjust the power supplied by the control means,
The power generation step, wherein the renewable power generation means generates power using renewable energy,
A prediction step of obtaining a predicted value of the amount of power generated by the renewable power generation unit, and a predicted value of demand power,
A calculating means for calculating, using the predicted value of the power generation amount and the predicted value of the demand power, the control means calculates a downward adjustment force indicating an adjustable range using the adjustment power supply means;
A power supply method including a display step in which the display means displays the lowering adjustment force calculated in the calculation step. In the power generation step, the renewable power generation means performs power generation using renewable energy according to a renewable power generation plan,
In the display step, the display means includes:
Displaying the lowering adjustment force calculated in the calculation step,
At one or more times, now and in the future,
A difference between the planned value of the power generation amount in the renewable power generation plan and the predicted value of the power generation amount predicted by the prediction means, and / or
The power supply method according to claim 1, wherein a difference between a planned value of the power demand in the renewable energy generation plan and a predicted value of the power demand predicted by the prediction unit is displayed. The renewable power generating means includes a first renewable power generating means capable of giving a command from the control means,
The first renewable power generating means includes a direct first renewable power generating means and an indirect first renewable power generating means,
The indirect power generation time at which the indirect first renewable power generation unit starts power generation according to the command is later than the direct power generation time at which the direct first renewable power generation unit starts power generation according to the command,
In the calculating step, the calculating means includes:
After the direct power generation time has elapsed from the command assumed time, the downward adjustment force with reference to the power generation amount according to the command by the direct first renewable power generation means,
After the elapse of the indirect power generation time from the command assumed time, the direct first renewable power generation means and the indirect first renewable power generation means calculate the downward adjustment force with reference to the power generation amount according to the command,
In the display step, the display means includes:
After the direct power generation time elapses from the command assumed time, the lowering adjustment force with reference to the power generation amount according to the command by the direct first renewable power generation means,
3. The control device according to claim 1, wherein after the indirect power generation time elapses from the command assumed time, a downward adjustment force with reference to a power generation amount according to a command from the direct first renewable power generation unit and the indirect first renewable power generation unit is displayed. The power supply method described in 1. The renewable power generation unit includes a first renewable power generation unit that can issue a command after starting power generation according to a renewable power generation plan,
The control means,
When the lowering adjustment force is lower than a first reference value, an output restriction command is notified to the first renewable power generation unit to limit the output from the renewable power generation plan, and / or
A command step for the control means notifying the first renewable power generation means of an output resumption command to increase the output more than the renewable power generation plan when the lowering adjustment force is higher than a second reference value; The power supply method according to claim 1, further comprising:   5. The power supply method according to claim 4, wherein in the commanding step, the calculation unit determines the first reference value and / or the second reference value using a predicted value and / or an actual value of power demand. The central power supply command center includes the control means,
The general control center has a general control center server,
In the command step,
The control unit notifies the integrated control center server of a command to adjust output,
The power supply method according to claim 4, wherein the integrated control station server notifies the first renewable power generation unit of a schedule according to the command.   The power supply method according to any one of claims 4 to 6, wherein a monitoring unit included in the power supply system includes a monitoring step of monitoring whether the first renewable power generation unit outputs power according to a command. The first renewable power generation means includes a plurality of renewable power plants,
When the output restriction command is notified in the command step, a part of the plurality of renewable power plants is limited in output,
The power supply according to any one of claims 4 to 7, wherein some of the renewable power plants whose output is limited are selected using a record whose output has been limited and / or a power generation situation. Method.   The calculation step, wherein the calculating unit calculates the lowering adjustment force using an amount of power supplied by the adjustment power supply unit and a minimum power supply amount that is a minimum power supply amount of the adjustment power supply unit. 9. The power supply method according to any one of 1 to 8. The adjustment power supply unit includes a plurality of unit power supply units,
The power supply method according to claim 9, wherein in the calculation step, the calculation unit obtains the minimum power supply amount using a unit minimum power supply amount that is a minimum power supply amount of each of the unit power supply units. A power supply system,
Control means, calculating means, predicting means, renewable power generation means, and adjustment power supply means,
The renewable power generation means supplies power generated using renewable energy,
The adjustment power supply means, unlike the renewable power generation means, supplies power, and can adjust the power supplied by the control means,
The renewable power generation means generates power using renewable energy,
The prediction means, after starting the power generation using the renewable energy, to obtain a predicted value of the amount of power generated by the renewable power generation means, and a predicted value of the power demand,
A power supply system, wherein a calculation means calculates a downward adjustment force indicating a range adjustable using the adjustment power supply means, using the predicted value of the power generation amount and the predicted value of the demand power.