JP2016046884A - Wide-area system control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wide-area system control device capable of securing an adjustment force over an entire power system.SOLUTION: The wide-area system control device includes a first generator that utilizes renewable energy and a second generator capable of adjusting supply power, and is configured to control a plurality of power systems which are connected via an interlock line. The wide-area system control device includes: an adjustment capacity information acquisition section 1 for acquiring adjustment capacity information indicating the capacity of adjustable supply power for each power system; an interlock line power transmission amount calculation section 2 for calculating a power transmission amount to transmit power from each power system to the interlock line on the basis of the adjustment capacity information; and a power transmission information transfer section 3 for transferring power transmission information indicating the calculated power transmission amount to each power system.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a wide area system control device that controls a power system in order to maintain the frequency and voltage of the wide area power system.

  When many renewable energies (hereinafter also referred to as “renewable energy”) such as wind power generators or solar power generators are connected to the power system, the power system becomes unstable due to fluctuations in the amount of renewable energy, and the frequency operation range Deviation is likely to occur. In a conventional system control device, by adjusting the power or power generation of adjustable thermal power / hydraulic power or power generation by transmitting power to another system area, an adjustment power for fluctuation is generated (for example, see Patent Document 1).

  By transmitting a certain amount of power to the connected power system through the interconnection line, the operation or generation of adjustable thermal and hydro power is increased, and the adjustment power to the fluctuation is generated. It is possible to increase the introduction of renewable energy while ensuring stable operation of the system frequency.

JP 2012-5302 A

  However, the technique described in Patent Document 1 does not take into consideration the adjustment power of other power system regions and the case where a plurality of interconnection lines are connected to a plurality of power system regions. From the point of view, the entire power system is not coordinated. Moreover, the transmission capacity determined for each interconnection line is not taken into consideration.

  From the above, it is unclear whether or not the interconnected line can actually be transmitted, and if transmission is possible, the adjustment power of the target power system is always increased by a certain amount. There is a possibility that surplus or shortage of adjustment power may occur in each grid area depending on the amount of power transmission.

  Then, an object of this invention is to provide the wide area system control apparatus which can ensure adjustment power in the whole electric power grid | system.

  A wide area system control device according to the present invention includes a first generator using renewable energy and a second generator capable of adjusting supply power, and a plurality of electric powers connected via an interconnection line. A wide-area system control device that controls a system, for each of the power systems, based on the adjustment reserve power information, an adjustment reserve power information acquisition unit that acquires adjustment reserve power information indicating a reserve capacity of the supply power that can be adjusted, A power transmission amount calculation unit that calculates a power transmission amount that each power system transmits to the connection line, and a power transmission information notification unit that transmits power transmission information indicating the calculated power transmission amount to each power system. Is.

  Another wide area system control apparatus according to the present invention includes a first generator that uses renewable energy and a second generator that can adjust supply power, and are connected via interconnecting lines. Wide area control apparatus for controlling the power system of each of the power system, for each power system, a system information acquisition unit that acquires system information including the predicted demand of power, and the predicted demand of the power for each power system An adjustment margin evaluation value that calculates an adjustment margin evaluation value indicating a relationship between the remaining power of the supplied power of the second generator with respect to the grid information, and each electric power system based on the adjustment margin evaluation value A power transmission amount calculation unit that calculates a power transmission amount to be transmitted to the interconnection line, and a power transmission information notification unit that transmits power transmission information indicating the calculated power transmission amount to each power system.

  According to the present invention, the wide area system control device calculates the power transmission amount that each power system transmits to the interconnection line based on the adjustment surplus information or system information of each power system, and the power transmission information indicating the calculated power transmission amount Is transmitted to each power system, the adjustment power secured between the power systems can be accommodated to ensure the adjustment power in the entire power system.

2 is a functional configuration diagram of a wide area system control device according to Embodiment 1. FIG. 1 is a configuration diagram of a wide area system control device according to Embodiment 1. FIG. 3 is a flowchart showing the operation of the wide area system control device according to the first embodiment. It is an image figure for demonstrating the supply-and-demand balance and adjustment margin in Embodiment 1. FIG. It is an image figure for demonstrating the imbalance of supply and demand in Embodiment 1, and the shortage of adjustment margin. FIG. 3 is an image diagram for explaining securing of an adjustment margin by power transmission in the first embodiment. 3 is a flowchart showing interconnected line power transmission amount calculation processing in the first embodiment. FIG. 3 is an image diagram for explaining securing of adjustment margin in three or more power system regions in the first embodiment. 3 is an image diagram for explaining a transmission capacity of a connection line in the first embodiment. FIG. It is an image figure for demonstrating the setting of the adjustment margin of each electric power grid area in Embodiment 1. FIG. It is an image figure for demonstrating the result of having secured the adjustment margin of each electric power grid area in Embodiment 1. FIG. FIG. 6 is a functional configuration diagram of a wide area system control device according to a second embodiment. 6 is a flowchart showing the operation of the wide area system control device according to the second embodiment. FIG. 10 is an image diagram showing a change in the operating state of a generator in a third embodiment. FIG. 10 is an image diagram showing an enlargement of an adjustment margin in Embodiment 3. 10 is a flowchart showing interconnection power transmission amount calculation processing in the third embodiment. FIG. 10 is an image diagram showing an adjustment margin in consideration of an output change speed in the fifth embodiment.

<Embodiment 1>
Embodiment 1 of the present invention will be described below with reference to the drawings. FIG. 1 is a functional configuration diagram of the wide area system control device according to the first embodiment. As shown in FIG. 1, the wide area system control device includes an adjustment reserve power information acquisition unit 1, a connection line power transmission amount calculation unit 2, and a power transmission information notification unit 3.

  FIG. 2 is a configuration diagram of the wide area system control device, and shows a configuration of a general hardware device. As shown in FIG. 2, the wide area system control device includes a computer 22, an input device 21, an output device 28, and an external storage device 27. The computer 22 includes a CPU 23, a main storage device 24, and an auxiliary storage device 25. The input device 21 includes, for example, a keyboard and a mouse, and an operator can input various information to the computer 22 via the input device 21. The output device 28 is constituted by a display, for example, and displays an output result from the computer 22. The computer 22 and the external storage device 27 are connected via a network 26 such as the Internet.

  In the first embodiment, the adjustment margin information acquisition unit 1 can be realized by acquiring the adjustment margin information of each power system region via the network 26, for example. In addition, the operator of the wide area system control device obtains the adjustment capacity information by using means such as telephone or e-mail, and any of the input device 21, the main storage device 24, the auxiliary storage device 25, the network 26, and the external storage device 27. Alternatively, it can be realized by acquiring a combination of a plurality of these.

  Here, the adjustment surplus information is information indicating a range of power that can be increased or decreased in the output of the generator in order to make the power demand and the supplied power coincide with each other in each power system region. In other words, the adjustment surplus power information is the magnitude of the surplus power that can be adjusted to balance demand and supply (for example, the output of a thermal power generator or a hydroelectric power generator that can adjust output).

  The interconnection power transmission amount calculation unit 2 can be realized by using the CPU 23 as an internal calculation process of the computer 22. The interconnected line power transmission amount calculation unit 2 can be realized by executing on the CPU 23 what is developed on the main storage device 24 as a program, for example. The CPU 23 reads data stored in the main storage device 24, performs processing as the interconnection power transmission amount calculation unit 2, and transmits power transmission information indicating the power transmission amount for the interconnection line obtained as a result to the main storage device 24. Store. Further, the power transmission amount for the interconnection line may be stored in the auxiliary storage device 25 or may be stored in the external storage device 27 via the network 26. Furthermore, the amount of power transmitted to the interconnection line may be displayed on the output device 28 and shown to the operator.

  The power transmission information notification unit 3 communicates power transmission information to the related business operators (power generation business operators or power transmission business operators) in each power system region through the network 26. It can also be realized by the operator notifying the power transmission information using means such as telephone or e-mail.

  Next, the operation of the wide area system control device will be described with reference to FIGS. FIG. 3 is a flowchart showing the operation of the wide area system control device, FIG. 4 is an image diagram for explaining the supply and demand balance and the adjustment margin, and FIG. 5 explains the supply and demand imbalance and the lack of adjustment margin. FIG. 6 is a conceptual diagram for explaining the securing of adjustment margin by power transmission.

  First, the power system area will be briefly described. As shown in FIG. 6B, for example, the power grid area A and the power grid area B are connected by a connection line. In the power system area A, one solar power generator 30 is provided, and in the power system area B, three solar power generators 30 and one wind power generator 31 are provided. A generator using renewable energy such as the solar power generator 30 and the wind power generator 31 corresponds to the first power generator. Although not shown in FIG. 6B, in the power grid area A and the power grid area B, a thermal power generator or a hydraulic power generator is also provided as a second generator capable of adjusting the supplied power. Here, in the power grid area, one or more first generators may be provided, and one or more second generators may be provided. Furthermore, there may be a power system area where the first generator is not provided.

  Returning to the description of the operation of the wide area system control device. As shown in FIG. 3, first, in step S <b> 1, the adjustment margin information acquisition unit 1 acquires the adjustment margin information for acquiring the adjustment margin information of each power system region (hereinafter also referred to as “region”) from the related business operator. Perform the process.

  The output (supply power) of the adjustable generator can be balanced (supply / demand balance) by adjusting the output between the minimum output and the maximum output as shown in FIG. 4 (balance point in FIG. 4). . For example, if the output of renewable energy deviates from the predicted output (for example, increases) during a certain 30-minute period of the day, the supply and demand is adjusted (for example, decreased) within the adjustable power reserve range. Take a balance. At this time, if the renewable energy output deviates (for example, increases) beyond the adjustable range of the adjustable generator, the surplus adjustment capacity becomes negative due to excess supply capacity as shown in FIG. 5, and the balance between demand and supply can be maintained. Sometimes it disappears. Here, the adjustable generator (second generator) is something other than a generator using renewable energy, for example, a thermal generator or a hydroelectric generator.

  In step S2 of FIG. 3, the interconnected line power transmission amount calculation unit 2 calculates a transmission power transmission amount calculation process for calculating the transmitted power amount to the interconnected line connecting the regions based on the acquired adjustment capacity information of each region. To implement. For example, as shown in the upper part of FIG. 6A, power is transmitted from the region B where the adjustment margin is negative to the region A where the adjustment margin is sufficient, and the adjustment margin of each region is averaged as shown in Equation (1). k represents a region, and N represents the number of regions. t indicates a time zone, for example, an adjustment margin for 0 to 30:30 (single time zone).

  The power transmission amount is obtained from the difference between the adjustment margin and the adjustment margin average value as shown in Equation 2, and the transmission amount between the regions is obtained from the change in the adjustment margin of each adjacent region j connected by the interconnection line.

  FIG. 7 shows the above concept in a processing flow. FIG. 7 is a flowchart showing interconnection power transmission amount calculation processing.

  First, the CPU 23 checks whether or not there is a connection line between the shortage / margin areas, that is, between the area where the adjustment capacity is insufficient and the area where the adjustment capacity is sufficient (step S11). More specifically, the CPU 23 checks whether or not there is a connection line that is a calculation target regarding the amount of power transmission between an area where the adjustment capacity is insufficient and an area where the adjustment capacity is sufficient. Here, the interconnection line that is the calculation target for the transmission amount is an interconnection line that has a sufficient transmission capacity because the transmission amount is less than the capacity limit. When there is a connection line (Yes in step S11), the adjustment margins in each region are averaged (step S12). The CPU 23 calculates the power transmission amount (step S13).

  When the calculated power transmission amount exceeds the transmission capacity of the interconnection line (Yes in step S14), the excess part is corrected to be equal to or less than the transmission capacity (step S15), and the adjustment capacity of each region is calculated again as necessary. (Step S16). As a result, if there is an area where the adjustment capacity is insufficient (Yes in step S17), the transmission line limit interconnection line is excluded (step S18), and the process returns to step S11. However, this process is complete | finished when it is No in step S11, step S14, and step S17.

  In addition, there is also a method of transmitting to the region A the amount necessary to make the adjustment margin zero, in order to ensure the minimum adjustment margin in the region B where the adjustment margin is insufficient. Depending on the transmission capacity of the interconnection line, there is a case where the power necessary for securing the adjustment margin cannot be transmitted, but even in that case, the adjustment margin can be secured as much as possible.

  When there are three or more regions, for example, as in FIG. 6, a method of obtaining the amount of power transmission between regions so that the adjustment capacity of all regions becomes 0 or more, or the amount of power transmission to average the adjustment power of all regions There is a way to ask. Each region is connected to other regions by one or more interconnection lines, and may be connected to two or more regions. As an implementation method, there may be a plurality of power transmission destinations or a plurality of power transmission sources. Alternatively, power may be transmitted to a previous region via a plurality of regions through a connection line.

  Next, a specific example when there are three or more areas will be described. FIG. 8 is an image diagram for explaining the securing of adjustment capacity in three or more regions, FIG. 9 is an image diagram for explaining the transmission capacity of the interconnection line, and FIG. FIG. 11 is an image diagram for explaining the setting of adjustment margin, and FIG. 11 is an image diagram for explaining the result of securing the adjustment margin in each region.

  As shown in FIG. 8, when there are three power systems of area A, area B, and area C, and the transmission capacity of each interconnection line is set as shown in FIG. 9, for example, case 1 in FIG. Then, the adjustment capacity of region A is -20, which is insufficient. At this time, the adjustment capacity in each region is averaged to be 10 (= (− 20 + 40 + 10) / 3), and 30 power transmissions from the area A to the area B are performed, so that the adjustment capacity is increased in each area as shown in Case 1 of FIG. Can be secured.

  Similarly, in case 2 of FIG. 10, the adjustment capacity of region A is −10, which is insufficient, but the adjustment capacity of region B is 0, and adjustment between region A and region B cannot be performed. Therefore, the adjustment capacity of area A is secured by transmitting power from area A to area C via area B using the adjustment capacity of area C. In addition, as a result of power transmission from the region B for averaging, as shown in Case 2 in FIG.

  In case 3 of FIG. 10, the adjustment surplus is averaged to be 10, but the amount of power transmission is limited by the transmission capacity of the interconnection line. In order to average, 70 power transmissions from the region B to the region A are necessary, but the power transmission capacity 50 becomes the upper limit and becomes the power transmission amount 50. As the transmission capacity is 40 from region B to region C, 40 power transmission from region B to region C results in securing sufficient adjustment capacity in each region as shown in Case 3 in FIG. It becomes.

  In this way, power may be divided into a plurality of regions, and when there are regions where adjustment capacity is insufficient, power may be transmitted from a plurality of regions to one region.

  As a method of calculating the amount of power transmission, there is a method of minimizing the total amount of power transmission for securing adjustment capacity in each region, as shown in Equation 3, for example, in addition to averaging the amount of power transmission. Since the interconnection line is also used for purposes other than ensuring the adjustment margin, it is possible to suppress the influence of securing the adjustment margin. For example, in case 1 of FIG. 10, the amount of power transmission is the smallest when the amount of power transmission from region A to region B is 20, and the adjustment margin of region A is 0, the adjustment margin of region B is 20, and the region C The adjustment margin is 10. In this case, although different from the result of case 1 in FIG. 11 (power transmission amount 30), it was possible to secure the adjustment capacity in each region and to minimize the total power transmission amount (power transmission amount 20).

  As a method of minimizing the amount of power transmission, such as when the power system has become more complex, for example, the adjustment capacity secured in each region or the condition of transmission capacity of each interconnection line is set, and the amount of power transmission using linear programming etc. The power transmission amount of each interconnection line can be calculated by aiming to minimize the total.

  In addition, there is a method of calculating the amount of power transmission so as to minimize the cost required for power transmission (power transmission cost) as shown in Equation 4 using linear programming or the like. The interconnection line usage fee may be different for each interconnection line or its power transmission direction.

  In step S3 in FIG. 3, the power transmission information notification unit 3 performs a power transmission information notification process for notifying the calculated power transmission amount to related businesses in each region, and the wide area system control device ends the operation.

  As described above, in the wide area system control device according to Embodiment 1, the power transmission amount that each power system transmits to the interconnection line is calculated based on the adjustment margin information of each power system, and the calculated power transmission amount is indicated. Since the transmission information is transmitted to each power system, the adjustment power (adjustment power) can be secured in the entire power system by accommodating the adjustment power (adjustment power) secured between the power systems.

  Therefore, the adjustment capacity is distributed to both the power transmission source area and the power transmission destination area, and it is possible to prevent the adjustment capacity from being biased to one area. Thereby, it is possible to maximize the amount of renewable energy introduced in the entire power system. Here, the amount of renewable energy introduced is the installed capacity of the first generator that uses the operating renewable energy, that is, the maximum output of the first generator.

  Since the interconnected line power transmission amount calculation unit 2 determines the power transmission amount so that the total amount of power transmission is minimized, it is possible to secure an adjustment capacity in each region and minimize the total amount of power transmission.

  In order to determine the amount of power transmission so that the power transmission cost is minimized, the interconnected line power transmission amount calculation unit 2 secures an adjustment capacity in each region and minimizes the power transmission cost paid by the user of the interconnected line. be able to.

<Embodiment 2>
Next, a wide area system control apparatus according to Embodiment 2 will be described. FIG. 12 is a functional configuration diagram of the wide area system control device according to the second embodiment. In the second embodiment, the same components as those described in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  As shown in FIG. 12, the wide area system control apparatus according to the second embodiment includes a system information acquisition unit 61 and an adjustment capacity evaluation unit 62 instead of the adjustment capacity information acquisition unit 1 of the first embodiment.

  The grid information acquisition unit 61 can be realized by acquiring grid information of each power grid area via the network 26 (see FIG. 2). In addition, the operator of the wide area system control device obtains system information using a means such as telephone or e-mail, and any one of the input device 21, the main storage device 24, the auxiliary storage device 25, the network 26, and the external storage device 27. Or by combining and obtaining a plurality of these.

  The adjustment margin evaluation unit 62 can be realized by using the CPU 23 as an internal calculation process of the computer 22. The adjustment margin evaluation unit 62 can be realized, for example, by executing on the CPU 23 what is developed on the main storage device 24 as a program. The CPU 23 reads data stored in the main storage device 24, performs processing as the adjustment margin evaluation unit 62, and uses the adjustment margin evaluation value (hereinafter also referred to as “evaluation value”) obtained as a result thereof as the main storage device 24. To store. The evaluation value may be stored in the auxiliary storage device 25 or may be stored in the external storage device 27 via the network 26. Furthermore, the evaluation value may be displayed on the output device 28 and shown to the operator.

  Here, the adjustment margin evaluation value is a value indicating, for example, the relationship of the remaining power supply power of the second generator to the predicted power demand, and more specifically, the supply of the second generator to the predicted power demand. This is a value indicating the ratio of the remaining power.

  Next, the operation of the wide area system control device will be described with reference to FIG. FIG. 13 is a flowchart showing the operation of the wide area system control device.

  First, in step S <b> 21, the system information acquisition unit 61 performs system information acquisition processing for acquiring system information of each region from the related business operator. Here, the system information is information including predicted power demand in each region. More specifically, the grid information is information including, for example, the amount of renewable energy introduced, the amount of predicted renewable energy output, or the amount of power generation other than renewable energy, in addition to the predicted power demand in each region.

  In step S22, the adjustment margin evaluation unit 62 calculates the adjustment margin evaluation value based on the system information.

  The evaluation value is calculated using the system information acquired by the system information acquisition unit 61 as shown in Equation 1, for example. k indicates a region, and t indicates a time zone. For example, an evaluation value is calculated for 30 minutes from 0 o'clock to 0:30 in region k. The evaluation value of Equation 5 uses the ratio of the power generation surplus power (supply power surplus power) of the second generator capable of adjusting the power supply other than renewable energy to the predicted demand in each region.

  This evaluation value is an example and is not limited thereto. Another example is shown as an evaluation value. Since Equation 6 shows how much renewable energy generates electricity, for example, the operator inputs and specifies a coefficient α (0.0 to 1.0) for the amount of introduced renewable energy.

  Or as shown in Formula 7, you may input the electric power generation amount of the 2nd generator which can adjust supply electric power other than renewable energy.

  Next, in step S <b> 2, the interconnected line power transmission amount calculation unit 2 performs a interconnected line power transmission amount calculation process for calculating the transmitted power amount to the interconnected line connecting each region based on the evaluation value. For example, Expression 8 shows an evaluation value obtained by averaging the adjustment margin evaluation values shown in Expression 5, 6, or 7 in each region. N indicates the number of areas.

  The amount of power transmitted from a certain area can be calculated by, for example, Equation 9. In other words, the amount of power transmitted from a certain area is calculated from the difference between the evaluation value calculated from Equation 5, 6, or 7, and the evaluation value calculated from Equation 8, and the estimated demand. Can do.

  In addition to averaging the power surplus evaluation value, the power transmission amount may be calculated for the purpose of minimizing the power transmission amount or minimizing the power transmission cost as in the case of the first embodiment.

  Next, in step S <b> 3, the power transmission information notification unit 3 performs power transmission information notification processing for notifying the calculated power transmission amount to related businesses in each region.

  As described above, in the wide area system control device according to the second embodiment, the power transmission amount that each power system transmits to the interconnection line is calculated based on the system information, and the power transmission information that indicates the calculated power transmission amount is calculated for each power. Since it is transmitted to the grid, the adjustment margin (adjustment force) can be ensured in the entire power system by accommodating the adjustment margin (adjustment force) secured between the power grids.

  Therefore, the adjustment capacity is distributed to both the power transmission source area and the power transmission destination area, and it is possible to prevent the adjustment capacity from being biased to one area. Thereby, it is possible to maximize the amount of renewable energy introduced in the entire power system.

<Embodiment 3>
Next, a wide area system control apparatus according to Embodiment 3 will be described. FIG. 14 is an image diagram showing a change in the operating state of the generator in the third embodiment, and FIG. 15 is an image diagram showing an increase in adjustment margin. In the third embodiment, the same components as those described in the first and second embodiments are denoted by the same reference numerals, and the description thereof is omitted.

  The wide area system control apparatus according to the third embodiment has the same functional configuration as that of the first embodiment.

  In the third embodiment, the adjustment margin information acquired by the adjustment margin information acquisition unit 1 matches, for example, power demand and supply power for each time zone obtained by dividing the day into a plurality of time zones in each power system region. Therefore, it is information indicating the range of power that can increase or decrease the output of the second generator.

  The power transmission information obtained by the interconnection power transmission amount calculation process is information indicating the power transmission amount for each time zone. The power transmission information notification unit 3 notifies the power transmission information for each time zone.

  The wide area system control apparatus according to Embodiment 3 operates according to the flowchart of FIG. First, in step S1, the adjustment margin information acquisition unit 1 performs adjustment margin information acquisition processing for acquiring the adjustment margin information for each time zone from the related company for each region. As a supply power that can be adjusted by targeting a plurality of time zones, it is possible to consider stopping or additional activation of the second generator, as shown in FIG. 14, in addition to performing output adjustment. For example, in addition to reducing and adjusting the output of the second generator, by stopping the second generator, adjustment beyond the output reduction is possible as shown in FIG. 15, and the adjustment margin can be increased. Normally, a predetermined working time is required to start or stop the second generator, and there is a minimum value for continuous operation time or continuous stop time, so it can be handled by handling multiple time zones simultaneously. it can. In addition, information on the remuneration (cost) required by the business owner that owns the generator is added to the change of the start or stop of the second generator.

  In the first and second embodiments, a single time zone (for example, 30 minutes) of the day is assumed, but the second generator can perform “stop or operate for 30 minutes”. For example, it is necessary to “stop continuously for 5 hours or more when stopping” or “operate continuously for 5 hours or more when starting”. For this reason, in Embodiments 1 and 2, the adjustment capacity in the future is not known, so the start or stop of the second generator cannot be changed without permission, and only output adjustment is performed. However, in the third embodiment, the adjustment capacity for each time period obtained by dividing the day into a plurality of time periods can be considered, and the future adjustment capacity can also be considered. Therefore, the adjustment is performed in consideration of the start or stop of the second generator. The amount can be accommodated.

  In step S <b> 2, the interconnected line power transmission amount calculation unit 2 calculates the power transmission amount in a plurality of time zones to the interconnected line connecting each region based on the acquired adjustment capacity information of each region. Carry out power transmission amount calculation processing. The interconnected line power transmission amount calculation unit 2 calculates the power transmission amount for each time zone so that the adjustment capacity in each region is 0 or more.

  The interconnection power transmission amount calculation process operates according to the flowchart of FIG. FIG. 16 is a flowchart showing interconnection line power transmission amount calculation processing. Since the process from step S11 to step S18 is the same as that in the first embodiment, the description thereof is omitted. The interconnected line power transmission amount calculation unit 2 calculates the transmitted power as in the case of the first embodiment, and there is a interconnected line between the area where the adjustment capacity is insufficient and the area where the adjustment capacity is sufficient. Check whether or not.

  When there are no more interconnected lines to be calculated (No in step S11), the interconnected line power transmission amount calculation unit 2 checks whether there is a second generator that can be activated or deactivated (step S31). . When there is a second generator that can be started or stopped (Yes in step S31), the interconnected line power transmission amount calculation unit 2 performs step S32 and step S33. Here, the case where there is no interconnected line to be calculated means that all interconnected lines are full of capacity.

  In step S32, the interconnected line power transmission amount calculation unit 2 changes the start or stop of the second generator with a low cost required for the start or stop change, for example, based on the adjustment margin information acquired from all the operators. In step S33, the adjustment surplus obtained by starting or stopping is added (added) to the adjustment surplus in the region where the second generator exists. Thereafter, the interconnected line power transmission amount calculation unit 2 shifts the process to step S11 and repeats the subsequent processes. Specifically, the interconnected line power transmission amount calculation unit 2 calculates the power transmission amount again to ensure the necessary adjustment margin, or until there is no second generator that can be started or stopped (No in step S31). ), Interconnected line power transmission amount calculation processing is performed.

  Next, in step S <b> 3, the power transmission information notification unit 3 performs a power transmission information notification process in which the power transmission information calculated for each time zone is communicated to related companies in each region.

  As described above, in the wide area system control device according to the third embodiment, the adjustment surplus power information acquisition unit 1 acquires the adjustment surplus information for each time period obtained by dividing the day into a plurality of time periods, and the interconnection line The power transmission amount calculation unit 2 calculates the power transmission amount on the basis of the adjustment surplus information for each time zone.

  Therefore, in addition to the effects obtained in the first embodiment, an adjustment margin (adjustment force) that takes into account an adjustment margin (adjustment force) that increases or decreases by starting or stopping the second generator by targeting a plurality of time zones. ) Is possible.

<Embodiment 4>
Next, a wide area system control apparatus according to Embodiment 4 will be described. Note that in the fourth embodiment, the same components as those described in the first to third embodiments are denoted by the same reference numerals and description thereof is omitted.

  The wide area system control apparatus according to the fourth embodiment has the same functional configuration as that of the second embodiment.

  In the fourth embodiment, the system information acquisition unit 61 acquires system information for each time period obtained by dividing one day into a plurality of time periods. The adjustment margin evaluation unit 62 calculates an adjustment margin evaluation value for each time zone based on the system information. The power transmission information obtained by the interconnection power transmission amount calculation process is information indicating the power transmission amount for each time zone. The power transmission information notification unit 3 notifies the power transmission information for each time zone.

  The wide area system control apparatus according to the fourth embodiment operates in accordance with the flowchart of the second embodiment shown in FIG.

  First, in step S <b> 21, the system information acquisition unit 61 performs system information acquisition processing for acquiring system information for a plurality of time zones in each region from related businesses. The system information covers a plurality of time zones, and is handled including, for example, the start / stop plan of the second generator in addition to the information shown in the second embodiment.

  In step S22, the adjustment margin evaluation unit 62 calculates adjustment margin evaluation values for a plurality of time zones based on the system information.

  In step S <b> 2, the interconnected line power transmission amount calculation unit 2 performs an interconnected line power transmission amount calculation process for calculating the power transmission amounts in a plurality of time zones to the interconnected lines connecting the respective regions based on the evaluation value.

  In step S <b> 3, the power transmission information notification unit 3 performs a power transmission information notification process for notifying the related businesses in each region of the calculated power transmission amounts in a plurality of time zones.

  As described above, in the wide area system control device according to the fourth embodiment, the system information acquisition unit 61 acquires system information for each time period obtained by dividing one day into a plurality of time periods, and adjusts the remaining capacity evaluation unit 62. Calculates a reserve capacity evaluation value based on the grid information for each time zone, and the interconnected line power transmission amount calculation unit 2 calculates a power transmission amount for each time zone.

  Therefore, in addition to the effects obtained in the second embodiment, an adjustment margin (adjustment force) that takes into account an adjustment margin (adjustment force) that increases or decreases by starting or stopping the second generator by targeting a plurality of time zones. ) Is possible.

<Embodiment 5>
Next, a wide area system control apparatus according to Embodiment 5 will be described. FIG. 17 is an image diagram showing an adjustment margin in consideration of the output change speed in the fifth embodiment. Note that in the fifth embodiment, the same components as those described in the first to fourth embodiments are denoted by the same reference numerals, and description thereof is omitted.

  The wide area system control apparatus according to the fifth embodiment has the same functional configuration as that of the third embodiment.

  In the fifth embodiment, the adjustment margin information acquisition unit 1 acquires the adjustment margin information in a plurality of time units for each time zone.

  Adjustment margin information includes adjustment margins for a plurality of time units. For example, assuming that the predicted output of renewable energy is data in units of 30 minutes, the adjustment capacity for data in units of 30 minutes and the cycle of renewable energy that is shorter than the unit of 30 minutes, for example, units of minutes or tens of seconds Adjustment margin for output fluctuations. The plurality of time units may be not only two time units but also three or more time units.

  The power transmission information obtained by the interconnected line power transmission amount calculation process is information indicating the power transmission amount in a plurality of time units in each time zone. The interconnected line power transmission amount calculation unit 2 calculates a power transmission amount for securing an adjustment margin in a plurality of time units such as a unit of 30 minutes and a unit of several minutes. The power transmission information notification unit 3 notifies the power transmission information for each time zone.

  The wide area system control apparatus according to the fifth embodiment operates according to the flowchart of the first embodiment shown in FIG.

  First, in step S1, the adjustment surplus information acquisition unit 1 performs adjustment surplus information acquisition processing for acquiring adjustment surplus information from a related company in a plurality of time units for each time zone in each region. The short-cycle adjustment margin is limited by the magnitude of the output (output change speed) that the second generator can change in a certain time. For this reason, the output cannot always be varied from the minimum output to the maximum output of the second generator.

  As shown in FIG. 17, the adjustment margin at time t takes into account the output performance at time t−1 and the output change speed, and the adjustable output width is limited by the possible output reduction as shown in Equation 10, The adjustment margin is as shown in the figure. Similarly, regarding the time t + 1, the adjustment margin is calculated in consideration of the lower limit of the output in consideration of the output reduction possible amount at the time t and the output change speed.

  Thus, there is an influence of the output change speed, and for example, the magnitude is different between the adjustment margin in units of 30 minutes and the adjustment margin in units of several minutes. Also, since the fluctuations in demand or output fluctuations in renewable energy are different at different time units, the necessary adjustment capacity is also different. As described above, the adjustment capacity information is different in different time units, and each needs to be handled separately.

  In step S <b> 2, the interconnected line power transmission amount calculation unit 2 calculates interconnected power transmission in a plurality of time zones to the interconnected lines connecting the regions based on the acquired adjustment capacity information of the respective regions. A quantity calculation process is performed. The interconnected line power transmission amount calculation unit 2 calculates the power transmission amount for each time zone based on the adjustment surplus information so that the adjustment power for each time unit in each region is 0 or more.

  Next, in step S <b> 3, the power transmission information notification unit 3 performs a power transmission information notification process in which the power transmission information calculated for each time zone is communicated to related companies in each region.

  As described above, in the wide area system control device according to the fifth embodiment, the adjustment surplus information acquisition unit 1 acquires the adjustment surplus information in a plurality of time units for each time zone.

  Therefore, in addition to the effects obtained in the third embodiment, the adjustment margin (adjustment force) for a plurality of time units can be taken into consideration, and the output change speed, which is the device restriction of the second generator in actual operation, is taken into consideration. The adjustment capacity (adjustment power) can be accommodated.

<Embodiment 6>
Next, a wide area system control apparatus according to Embodiment 6 will be described. Note that in the sixth embodiment, the same components as those described in the first to fifth embodiments are denoted by the same reference numerals and description thereof is omitted.

  The wide area system control apparatus according to the sixth embodiment has the same functional configuration as that of the fourth embodiment.

  In the sixth embodiment, the system information acquisition unit 61 acquires system information in a plurality of time units for each time zone.

  The system information includes system information for a plurality of time units. For example, it includes a predicted output of renewable energy in units of 30 minutes and information on output fluctuation in units of minutes or tens of seconds, which is shorter than the unit of 30 minutes. The plurality of time units may be not only two time units but also three or more time units.

  The adjustment capacity evaluation unit 62 calculates an adjustment capacity evaluation value based on the system information in a plurality of time units for each time zone. The power transmission information obtained by the interconnection power transmission amount calculation process is information indicating the power transmission amount for each time zone. The power transmission information notification unit 3 notifies the power transmission information for each time zone.

  The wide area system control apparatus according to the sixth embodiment operates in accordance with the flowchart of the second embodiment shown in FIG.

  First, in step S <b> 21, the system information acquisition unit 61 performs system information acquisition processing for acquiring system information for a plurality of time zones in each region from related businesses. The system information includes a plurality of system information in units of time, for example, system information in units of 30 minutes and system information in units of minutes.

  In step S22, the adjustment margin evaluation unit 62 calculates adjustment margin evaluation values for a plurality of time zones based on the system information. An adjustment margin evaluation value is calculated for each of a plurality of time units for which system information is obtained.

  In step S <b> 2, the interconnection power transmission amount calculation unit 2 calculates the transmission amounts in a plurality of time zones to the interconnection line connecting the regions based on the acquired adjustment margin evaluation value of each region. Carry out power transmission amount calculation processing. The interconnected line power transmission amount calculation unit 2 calculates the power transmission amount for each time zone so that the adjustment margin evaluation value becomes 0 or more for a plurality of time units.

  In step S <b> 3, the power transmission information notification unit 3 performs a power transmission information notification process in which the calculated power transmission information for a plurality of time zones is notified to related businesses in each region.

  As described above, in the wide area system control device according to Embodiment 6, the system information acquisition unit 61 acquires system information in a plurality of time units for each time zone, and the adjustment capacity evaluation unit 62 uses each time zone. For each time, an adjustment margin evaluation value is calculated based on the system information in a plurality of time units.

  Therefore, in addition to the effects obtained in the fourth embodiment, the adjustment margin (adjustment force) for a plurality of time units can be taken into consideration, and the output change speed, which is the device restriction of the second generator in actual operation, is taken into consideration. The adjustment capacity (adjustment power) can be accommodated.

  It should be noted that the present invention can be freely combined with each other within the scope of the invention, and each embodiment can be appropriately modified or omitted.

  DESCRIPTION OF SYMBOLS 1 Adjustment reserve capacity information acquisition part, 2 Interconnection line power transmission amount calculation part, 3 Transmission information notification part, 30 Solar power generator, 31 Wind power generator, 61 System information acquisition part, 62 Adjustment reserve capacity evaluation part.

Claims (8)

A wide-area system control device that has a first generator that uses renewable energy and a second generator that can adjust supply power, and that controls a plurality of power systems that are connected via interconnection lines. And
For each of the power systems, an adjustment margin information acquisition unit that acquires adjustment margin information that indicates the margin of the adjustable supply power;
Based on the adjustment surplus information, an interconnected line power transmission amount calculation unit that calculates an amount of power transmitted by each of the power systems to the interconnected line;
A power transmission information notification unit for transmitting power transmission information indicating the calculated power transmission amount to each of the power systems;
A wide area system control device. A wide-area system control device that has a first generator that uses renewable energy and a second generator that can adjust supply power, and that controls a plurality of power systems that are connected via interconnection lines. And
For each of the power systems, a system information acquisition unit that acquires system information including predicted demand for power,
For each of the power systems, an adjustment capacity evaluation unit that calculates an adjustment capacity evaluation value indicating a relation of the remaining capacity of the supplied power of the second generator to the predicted demand of the power based on the system information;
Based on the adjustment margin evaluation value, an interconnected line power transmission amount calculation unit that calculates the amount of power transmitted by each of the power systems to the interconnected line;
A power transmission information notification unit for transmitting power transmission information indicating the calculated power transmission amount to each of the power systems;
A wide area system control device. The adjustment margin information acquisition unit acquires the adjustment margin information for each time period obtained by dividing a day into a plurality of time periods,
The wide area system control device according to claim 1, wherein the interconnected line power transmission amount calculation unit calculates the power transmission amount based on the adjustment margin information for each time period. The system information acquisition unit acquires the system information for each time period that divides a day into a plurality of time periods,
The adjustment margin evaluation unit calculates the adjustment margin evaluation value based on the system information for each time period,
The wide area system control device according to claim 2, wherein the interconnected line power transmission amount calculation unit calculates the power transmission amount for each time period.   The wide area system control device according to claim 3, wherein the adjustment reserve power information acquisition unit acquires the adjustment reserve power information in a plurality of time units for each of the time zones. The system information acquisition unit acquires the system information in a plurality of time units for each time zone,
The wide area system control device according to claim 4, wherein the adjustment capacity evaluation unit calculates the adjustment capacity evaluation value based on the system information in a plurality of time units for each time period.   The wide area system control device according to claim 1, wherein the interconnected line power transmission amount calculation unit determines the power transmission amount so that a total of the power transmission amounts is minimized.   The wide area system control device according to claim 1, wherein the interconnected line power transmission amount calculation unit determines the power transmission amount so that a power transmission cost is minimized.

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