JP2014138471A - Voltage regulation system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a voltage regulation system capable of preventing influence on other control stations when voltage of an electric power system is regulated in a control station.SOLUTION: A voltage regulation system includes: a voltage prediction function 2 which predicts, when a voltage regulation facility to be operated in any control station of a plurality of control stations for operating voltage regulation facilities for regulating voltage of an electric power system is selected, a voltage value of the electric power system after the voltage regulation facility is operated; and a voltage regulation function 4 which operates the voltage regulation facility so that a predicted voltage value and a target voltage value correspond to each other if the prediction voltage value which is the voltage value predicted by the voltage prediction function 2 does not correspond to the target voltage value which is the voltage value set in advance.

Description

  The present invention relates to a voltage adjustment system for maintaining a voltage value of a power system at an appropriate value.

  Conventionally, power from a power plant has been supplied to consumers through a power system. The electric power system includes a voltage adjustment facility for adjusting a voltage and a plurality of control stations for operating the voltage adjustment facility.

  In the power system, a voltage value (hereinafter referred to as a target voltage value) for supplying stable power to the consumer is set in advance, and the voltage value of the power system is operated by operating the voltage adjustment equipment from the control center. Is adjusted so that the voltage value of the power system corresponds to the target voltage value.

  In such a power system, a voltage adjustment system is used to more reliably maintain the voltage value of the power system at an appropriate value. Such a voltage regulation system includes, for example, a system that controls the voltage of the power system when the voltage of the power system fluctuates as it rises or falls (see, for example, Patent Document 1).

JP 2012-239244 A

  By the way, in the electric power system as described above, each control station independently adjusts the voltage value of the electric power system. For this reason, the influence of the adjustment of the voltage value of the power system performed at any one of the plurality of control stations may affect other control stations (especially adjacent control stations).

  Therefore, even if the voltage adjustment system as described above is used, for example, the voltage value of the power system is increased at any one of the plurality of control stations, while the voltage of the power system is increased at another control station. When the value is lowered, the adjustment of the voltage value of the power system at each control station affects each other, and as a result, the voltage value of the power system at each control station cannot be made to correspond to the target voltage value. is there.

  Therefore, in view of such circumstances, the present invention provides a voltage adjustment system that can prevent other control stations from being affected when the voltage of the power system is adjusted at the control station. Let it be an issue.

  In the voltage regulation system according to the present invention, when a voltage regulation facility to be operated in any one of a plurality of control stations that operate the voltage regulation facility that regulates the voltage of the power system is selected, A voltage prediction function that predicts the voltage value of the electric power system after operating the voltage regulation equipment at each control station, and a target that is a voltage value in which a predicted voltage value that is a voltage value predicted by the voltage prediction function is set in advance If it does not correspond to the voltage value, it has a voltage adjustment function for operating the voltage adjustment equipment so that the predicted voltage value and the target voltage value correspond.

  According to the voltage regulation system having the above configuration, when a voltage regulation facility is selected at any one of a plurality of control stations, the voltage value of the power system at each control station after operating the voltage regulation facility. Is predicted. In a control station where the predicted voltage value does not correspond to the target voltage value, the voltage adjustment facility is operated so that the predicted voltage value corresponds to the target voltage value by the voltage adjustment function. Therefore, it is possible to actually operate the equipment selected at the control station after the voltage value of the power system at each control station corresponds to the target voltage value.

  Moreover, as one aspect of the present invention, the voltage prediction function predicts again the voltage value of the power system at each control station after the voltage adjustment function is executed.

  In this way, after the voltage adjustment facility is operated by the voltage adjustment function, the voltage value of the power system at each control station can be predicted again, so that the selected voltage adjustment facility is actually operated. Thus, the voltage value of the power system at each control station can be more reliably associated with the target voltage value.

  Further, as another aspect of the present invention, when a voltage adjustment facility to be operated at any one of a plurality of control stations is selected, to the voltage adjustment facility of another control station at each control station And a lock function for releasing the restriction on the operation of the voltage control equipment of other control stations in each control station after the selected voltage control equipment is operated.

  If it does in this way, when operating voltage regulation equipment so that a predicted voltage value and target voltage value may correspond by a voltage regulation function, it can prevent that control centers mutually operate voltage regulation equipment mutually. Therefore, when the selected voltage regulation equipment is actually operated, the voltage value of the power system at each control station can be more reliably associated with the target voltage value.

  As described above, according to the voltage adjustment system of the present invention, when the voltage of the power system is adjusted at the control station, it is possible to prevent the other control station from being affected. Can play.

FIG. 1 is a schematic diagram of a power system according to an embodiment of the present invention. FIG. 2 is a schematic diagram of the voltage regulation system according to the embodiment. FIG. 3 is a flowchart of the voltage adjustment system according to the embodiment. FIG. 4 is a flowchart of the voltage adjustment system according to the embodiment, and is an operation flowchart of the advance adjustment function. FIG. 5 is a flowchart of the voltage adjustment system according to the embodiment, and is a flowchart of the operation of the voltage adjustment function.

  Hereinafter, a voltage adjustment system according to an embodiment of the present invention will be described with reference to the accompanying drawings. First, prior to the description of the voltage regulation system, the power system will be described.

  As shown in FIG. 1, the power system 7 is connected to a plurality of voltage adjustment facilities and a plurality of control stations that control the voltage adjustment facilities. In addition, the power system 7 is set with sections (in this embodiment, a first section A1, a second section A2, and a third section A3) partitioned for each predetermined range. A predetermined voltage value (hereinafter referred to as a target voltage value) is set in the power system 7. In addition, although not shown in figure, each control center is mutually connected by the network. Moreover, in FIG. 1, the structure required for description of the voltage regulation system among the structures of an electric power system is extracted and shown in figure.

  The voltage adjustment equipment is composed of phase adjustment equipment (static capacitor C and shunt reactor R), a transformer T, and a generator G.

  Each of the control stations is connected to a section of the power system 7 different from each other. That is, the plurality of control stations include a first control station 71a connected to the first section A1, a second control station 71b connected to the second section A2, and a third control station connected to the third section A3. 71c.

  Therefore, each control station can operate the voltage adjustment equipment, the transformer T, and the generator G in the section to which it is connected. That is, the first control station 71a can operate the voltage adjusting equipment and the transformer T in the first section A1. The second control station 71b can operate the voltage adjusting equipment and the transformer T in the second section A2. The third control station 71c can operate the voltage adjusting equipment and the transformer T in the third section A3.

  In the electric power system 7, a system target voltage value and a distribution target voltage value that is a target voltage value different from the system target voltage value are set as target voltage values. In addition, what is necessary is just to set the system target voltage value and the change target voltage value in consideration of the effect of the voltage by the impedance of a power transmission line, a transformer, and a distribution line, and a voltage rise, for example.

  As shown in FIG. 2, the voltage regulation system 1 according to the present embodiment is a target to be operated at any one of a plurality of control stations that operate voltage regulation equipment that regulates the voltage of the power system 7. When a voltage adjustment facility is selected, a voltage prediction function 2 that predicts the voltage value of the power system 7 at each control station after operating the voltage adjustment facility is provided. In addition, the voltage adjustment system 1 includes a preceding adjustment function 3 that selects and executes a voltage adjustment method that can perform voltage adjustment more efficiently than the voltage adjustment in the voltage adjustment facility selected at the control station. Yes.

  In the present embodiment, selection is a state in which a voltage adjustment facility to be operated is selected, and is a state before the voltage adjustment facility is actually operated.

  If the predicted voltage value that is the voltage value predicted by the voltage prediction function 2 does not correspond to the target voltage value that is a preset voltage value, the voltage adjustment system 1 Is provided with a voltage adjustment function 4 for operating the voltage adjustment equipment. Furthermore, the voltage adjustment system 1 has a main adjustment function 5 that is executed after the voltage adjustment function 4 is executed.

  In addition, when the voltage adjustment equipment to be operated at any one of the plurality of control stations is selected, the voltage adjustment system 1 is connected to the voltage adjustment equipment of other control stations in each control station. A lock function 6 is provided for restricting the operation and releasing the restriction on the operation of the voltage control equipment of another control station at each control station after the selected voltage control equipment is operated.

  The voltage prediction function 2 predicts the voltage value of the power system 7 at each control station again after the voltage adjustment function 4 is executed. Further, the voltage prediction function 2 predicts the voltage value of the power system 7 at each control station again after the voltage adjustment function 4 is executed.

  The advance adjustment function 3 is executed at each of a plurality of control stations. Specifically, the advance adjustment function 3 includes a first determination function 30 for determining whether or not the reactive power of the generator G is in phase, and the voltage adjustment facility selected at the control station The second judgment function 31 for judging whether or not it is located in the vicinity of the place of occurrence and consumption, and the power loss (active power / reactive power) when actually operating the voltage regulation equipment selected at the control station A third determination function 32 for determining whether or not a loss occurs.

  In addition, the advance adjustment function 3 is based on the determination results of the cancellation function 33 for canceling the selection of the voltage adjustment equipment of the control center, the first determination function 30, the second determination function 31, and the third determination function 32. It has a display function 34 for displaying voltage regulation equipment that can perform voltage regulation more efficiently than voltage regulation by the voltage regulation equipment selected at the control station. Further, the advance adjustment function 3 has a selection function 35 for selecting the voltage adjustment facility displayed by the display function 34.

  The first determination function 30 executes the second determination function 31 when it is determined that the reactive power of the generator G is in phase. The first determination function 30 executes the cancel function 33 when it is determined that the reactive power of the generator G is not in phase (that is, when the reactive power of the generator G is determined to be in phase). It is supposed to be.

  The second determination function 31 executes the third determination function 32 when it is determined that the voltage regulating equipment selected at the control station is located in the vicinity of the reactive power generation point and the consumption point. ing. In addition, the second determination function 31 executes the cancel function 33 when it is determined that the voltage adjustment facility selected at the control station is not located in the vicinity of the reactive power generation point and the consumption point. Yes.

  The third determination function 32 executes the voltage adjustment function 4 when it is determined that no power loss (loss of active power and reactive power) occurs when the voltage adjustment facility selected at the control station is actually operated. It is supposed to be. The third determination function 32 is configured to execute a cancel function 33 when it is determined that a power loss will occur when the voltage regulation facility selected at the control station is actually operated.

  The cancel function 33 is configured to execute the display function 34 after canceling the selection of the voltage adjustment equipment from the control station.

  The display function 34 displays voltage adjustment facilities that can perform voltage adjustment more efficiently than each voltage adjustment facility selected at the control station at each control station.

  The selection function 35 selects an approval function 350 for approving the voltage adjustment equipment displayed by the display function 34 and the voltage adjustment equipment selected by the display function 34 when the voltage adjustment equipment is approved at each control station. And a determination function 351 for determining the above.

  The selection function 35 in the present embodiment displays a button at each control station as the approval function 350, and the voltage adjustment displayed by the determination function 351 with the display function 34 when the button is pressed at each control station. It can be configured to decide to actually select the equipment. In addition, the selection function 35 can be configured to select the voltage adjustment facility from a control station that has jurisdiction over the voltage adjustment facility displayed by the display function 34.

  The voltage adjustment function 4 includes a departure determination function 40 for determining whether or not the predicted voltage value of each control station corresponds to each of the system target voltage value and the distribution target voltage value, and the departure determination function 40 includes The first voltage correction function 41 executed when it is determined that the voltage value of the electric power system 7 and the target voltage value of the change are not corresponding, and the deviation determination function 40 determines the voltage value of the electric power system 7 of the control station. A second voltage correction function that is executed when it is determined that the distribution target voltage value does not correspond.

  The first voltage correction function 41 includes a re-prediction function 410 that re-predicts the voltage value of the power system 7 at each control station, a re-predicted voltage value that is a voltage value predicted by the re-prediction function 410, and a system target voltage value. So that the predicted voltage value and the system target voltage value do not correspond to each other, the first voltage transformation function 411 that operates the phase-adjusting equipment (in this embodiment, the transformer T) of the power system 7 of the control station. And have.

  Further, the first voltage correction function 41 has a determination function 412 for determining whether or not the re-predicted voltage value and the distribution target voltage value correspond to each other prior to executing the first voltage transformation function 411. When the function determines that the re-predicted voltage value and the distribution target voltage value do not correspond to each other, the voltage control facility of the power system 7 is operated so that the re-predicted voltage value and the system target voltage value correspond. A second transformer function 413;

  The second voltage correction function 42 is an identification function 420 for identifying whether the transformer T in the section where the predicted voltage value does not correspond to the target voltage value for distribution is for automatic control or manual control. A third transformation function 421 that is executed when the identification function 420 determines that the transformer T is for automatic control, and a determination function 420 determines that the transformer T is for manual control. And a notification function 422 to be executed.

  The third voltage transformation function 421 operates the transformer T of the control station that does not correspond to the predicted voltage value and the change target voltage value so that the predicted voltage value and the change target voltage value correspond to each other. It has become.

  The notification function 422 notifies the control station where the predicted voltage value and the target change voltage value do not correspond to each other that the predicted voltage value and the target target voltage value do not correspond. . That is, when the notification function 422 actually operates the voltage adjustment facility selected by the control station or the voltage adjustment facility selected by the selection function 35, the voltage value of the power system of the control station to which the operated voltage adjustment facility is connected. Is notified of the deviation from the target voltage value.

  When it is determined by the deviation determination function 40 that the re-predicted voltage value of each control station corresponds to the system target voltage value or the system target voltage value and the distribution target voltage value, the main adjustment function 5 The operation facility display function 50 that displays the operation of the selected voltage adjustment facility or the voltage adjustment facility selected by the selection function 35 at each control station, and the voltage adjustment facility or selection function 35 selected by the control station. When the voltage regulation facility is actually operated, the voltage regulation facility has a return function 51 that cancels the selection of the voltage regulation facility.

  The lock function 6 is a restriction on the operation of the voltage control equipment of other control stations at each control station before the selection function 35 of the advance adjustment function 3 is executed (in this embodiment, before the display function 34 is executed). Is to be canceled. Further, the lock function 6 is configured to regulate the operation of the voltage control equipment of other control stations at each control station even when the voltage control equipment is selected by the determination function 351. That is, in the voltage regulation system 1, the lock function 6 is executed every time the voltage prediction function 2 is executed.

  The voltage adjustment system 1 according to the present embodiment is as described above. Next, the operation of the voltage regulation system 1 according to the present embodiment will be described with reference to the attached drawings.

  As shown in FIG. 3, when a voltage adjustment facility (in this embodiment, a shunt reactor R from the first control center 71a) is selected from the control station (S1), the voltage adjustment facility in which the voltage prediction function 2 is selected. (In this embodiment, the predicted voltage value of the electric power system 7 at each control station after operating the shunt reactor R in the first section A1 is predicted (S2), and the lock function 6 is executed (S3). Then, the advance adjustment function 3 (first determination function 30) is executed.

  When the first determination function 30 determines that the reactive power of the generator G is in phase (YES in S4), the second determination function 31 is executed (S5). When the second determination function 31 determines that the voltage adjustment facility selected at the control station is located in the vicinity of the reactive power generation location and the consumption location (YES in S5), the third determination function 32 It is executed (S6). Further, when the third determination function 32 determines that no power loss occurs when the voltage adjustment facility selected at the control station is actually operated (YES in S6), the voltage adjustment function 4 is executed.

  On the other hand, when the first determination function 30 determines that the reactive power of the generator G is not in phase (NO in S4), or the second determination function 31 is disabled in the voltage adjustment facility selected at the control station. Power loss when it is determined that it is not located in the vicinity of the place where power is generated or consumed (NO in S5), or when the third determination function 32 actually operates the voltage regulation equipment selected at the control station 4 is determined (NO in S6), as shown in FIG. 4, the cancel function 33 cancels the selection of the voltage adjustment equipment from the control center (S8).

  And the restriction | limiting with respect to the control center of the lock function 6 is cancelled | released (S9), and the voltage adjustment equipment which can perform voltage adjustment more efficiently than the voltage adjustment by the voltage adjustment equipment which the display function 34 was selected in the control station. It is displayed on the control station (S10). Further, when the voltage adjustment facility displayed by the display function 34 is approved by the approval function 350 at each control station, the determination function 351 determines to actually select the voltage adjustment facility displayed by the display function 34 (S11).

  Then, the voltage prediction function 2 is executed again in a state where the voltage adjustment facility is selected by the selection function 35 (S2).

  Returning to FIG. 3, when the voltage adjustment function 4 is executed, the departure determination function 40 determines whether the predicted voltage value of each control station corresponds to each of the system target voltage value and the distribution target voltage value. (S12). When the departure determination function 40 determines that the predicted voltage value of each control station corresponds to each of the system target voltage value and the distribution target voltage value (YES in S12), the main adjustment function 6 is executed (S13).

  When the deviation determination function 40 determines that the re-predicted voltage value of each control station does not correspond to at least one of the system target voltage value and the distribution target voltage value (NO in S12), the first voltage The correction function 41 is executed. At this time, if the re-predicted voltage value of each control station does not correspond to at least the system target voltage value (YES in S14), the re-predicting function 410 predicts the voltage value in each section of the power system 7 (S15).

  When the determination function 412 determines that the re-predicted voltage value corresponds to the change target voltage value (YES in S16), the re-predicted voltage value and the system target voltage value correspond to each other. The first transformer function 411 operates the transformer T in a section where the predicted voltage value and the system target voltage value do not correspond (S17).

  On the other hand, if it is determined by the determination function 412 that the re-predicted voltage value of each control station does not correspond to the distribution target voltage value (NO in S16), prior to executing the first transformation function 411. Then, the second transformation function 413 is executed (S18). Then, the transformer T in the section where the predicted voltage value does not correspond to the change target voltage value is operated so that the re-predicted voltage value corresponds to the change target voltage value.

  When the deviation determination function 40 determines that the re-predicted voltage value at each control station does not correspond to only the distribution target voltage value (NO in S14), the second voltage correction function 42 is executed.

  When the identification function 420 identifies that the transformer T in the section in which the predicted voltage value and the distribution target voltage value do not correspond to the second voltage transformation function 413 is for automatic control (YES in S19), The third voltage transformation function 421 operates the transformer T in a section where the predicted voltage value and the distribution target voltage value do not correspond so that the predicted voltage value and the distribution target voltage value correspond (S20).

  When the identification function 420 identifies that the transformer T in the section in which the predicted voltage value and the distribution target voltage value do not correspond to the second voltage transformation function 413 is for manual control (NO in S19), The notification function 422 does not correspond to the predicted voltage value and the distribution target voltage value for the control station connected to the section in which the third voltage transformation function 421 does not correspond to the predicted voltage value and the distribution target voltage value. (I.e., when the voltage adjustment facility selected by the control station or the voltage adjustment facility selected by the selection function 35 is actually operated, the voltage value of the power system to which the operated voltage adjustment facility is connected becomes the distribution target voltage value. (S21).

  And by operating the transformer T in the control center which received the notification, it is possible to make the predicted voltage value correspond to the distribution target voltage value.

  Thus, after adjusting the voltage of the electric power grid | system 7 by the voltage adjustment function 4, the voltage prediction function 2 is performed again (S2).

  Returning to FIG. 3, when the main adjustment function 6 is executed (S13), the operation facility display function 50 controls each operation of the voltage adjustment facility selected by the control station or the voltage adjustment facility selected by the selection function 35. To display.

  When the voltage adjustment facility selected at the control station (or the voltage adjustment facility selected by the selection function 35) is actually operated, the return function 51 cancels the selection for the voltage adjustment facility. Further, the lock function 6 cancels the restriction on the operation of the voltage control equipment of other control stations at each control station.

  As described above, according to the voltage regulation system 1 according to the present embodiment, when a voltage regulation facility is selected at any one of a plurality of control stations, each voltage regulation facility after operating the voltage regulation facility is selected. The voltage value of the power system 7 is predicted at the control station. Then, in a control station where the predicted voltage value and the target voltage value do not correspond, the voltage adjustment facility 4 is operated by the voltage adjustment function 4 so that the predicted voltage value and the target voltage value correspond.

  Therefore, after the voltage value of the electric power system 7 corresponds to the target voltage value, the device selected at the control station can be actually operated. Therefore, when the voltage of the electric power system 7 is adjusted at the control station, it is possible to achieve an excellent effect that it is possible to prevent other control stations from being affected.

  Further, in the voltage adjustment system 1, the voltage prediction function 2 predicts the voltage value of the power system 7 at each control station again after the voltage adjustment function 4 is executed. After the adjustment facility is operated, the voltage value of the power system 7 at each control station can be predicted again. Therefore, by actually operating the selected voltage adjusting equipment, the voltage value of the power system 7 at each control station can be more reliably associated with the target voltage value.

  Furthermore, since the voltage adjustment system 1 includes the lock function 6, when operating the voltage adjustment facility so that the predicted voltage value and the target voltage value correspond to each other by the voltage adjustment function 4, the control stations are connected to each other. It is possible to prevent the operation of the transformer T of the adjustment facility. Therefore, when the selected voltage regulation equipment is actually operated, the voltage value of the power system 7 at each control station can be more reliably associated with the target voltage value.

  In addition, the voltage adjustment system 1 includes a preceding adjustment function 3 that selects and executes a voltage adjustment method that can perform voltage adjustment more efficiently than the voltage adjustment in the voltage adjustment facility selected at the control station. Therefore, the voltage can be adjusted efficiently while the voltage value of the power system 7 at each control station is more reliably associated with the target voltage value.

  Note that the voltage adjustment system of the present invention is not limited to the above-described embodiment, and various modifications are of course made without departing from the scope of the present invention.

  Although not specifically mentioned in the above embodiment, a method of clicking a symbol displayed on the screen can be adopted as a method of selecting the voltage adjustment facility from the control station.

  In the above embodiment, the voltage adjustment function 4 operates the voltage adjustment facility so that the predicted voltage value and the target voltage value correspond to each other. More specifically, the voltage adjustment function 4 If the predicted voltage value exceeds the target voltage value, the voltage value of the power system is decreased, and if the predicted voltage value is lower than the target voltage value, the voltage value of the power system is increased. .

  Moreover, in the said embodiment, each of the 1st voltage transformation function 411, the 2nd voltage transformation function 413, and the 3rd voltage transformation function 421 comes to adjust the voltage value of an electric power grid | system by operating the transformer T. However, the present invention is not limited to this. For example, the voltage value of the power system may be adjusted by operating the phase adjusting equipment (static capacitor C and shunt reactor R) or the generator G. it can.

  Moreover, when doing in this way, you may enable it to select what it wants to operate from the phase adjusting equipment (the static capacitor C and the shunt reactor R), the transformer T, and the generator G.

  DESCRIPTION OF SYMBOLS 1 ... Voltage adjustment system, 2 ... Voltage prediction function, 3 ... Advance adjustment function, 4 ... Voltage adjustment function, 5 ... Main adjustment function, 6 ... Lock function, 7 ... Electric power system, 30 ... Judgment function, 31 ... Judgment function, 32 ... Judgment function, 33 ... Cancel function, 34 ... Display function, 35 ... Selection function, 40 ... Deviation judgment function, 41 ... First voltage correction function, 42 ... Second voltage correction function, 50 ... Operating equipment display function 51 ... Return function, 71a ... first control station, 71b ... second control station, 71c ... third control station, 350 ... approval function, 351 ... decision function, 410 ... re-prediction function, 411 ... first Transformation function, 412 ... determination function, 413 ... second transformation function, 420 ... identification function, 421 ... third transformation function, 422 ... notification function, A1 ... section, A2 ... section, A3 ... section, A3 ... section C: Static capacitor, G ... Generator R ... shunt reactor, T ... transformer

Claims (3)

  After operating the voltage regulation equipment when the voltage regulation equipment to be operated at any of the control stations that operate the voltage regulation equipment that regulates the voltage of the power system is selected. If the voltage prediction function that predicts the voltage value of the power system at each control station and the predicted voltage value that is the voltage value predicted by the voltage prediction function does not correspond to the target voltage value that is a preset voltage value, A voltage regulation system comprising a voltage regulation function for operating voltage regulation equipment so that the predicted voltage value and the target voltage value correspond to each other.   The voltage adjustment system according to claim 1, wherein the voltage prediction function predicts again the voltage value of the power system at each control station after the voltage adjustment function is executed.   When the voltage regulation equipment to be operated at any one of the control stations is selected, the operation to the voltage regulation equipment of other control stations at each control station is regulated and selected. 3. The voltage regulation system according to claim 1, further comprising: a lock function for releasing a restriction on an operation to the voltage regulation equipment of another control station in each control station after the voltage regulation equipment is operated.

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