JP2008178172A - Supervisory control system for two or more electric stations - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a supervisory control system for two or more electric stations which can rationally perform a series of operation accompanied with operation of each apparatus in two or more electric stations in a short time. <P>SOLUTION: It has a serial operation controller 11A which serially operates apparatuses (for example, breakers CB) to be operated in predetermined operation order, in each electric station A, B and C at power failure operation or charge operation, and a blanket operation controller 11B which simultaneously operates apparatuses (for example, disconnectors LS) whose simultaneous operation is allowed after completion of the above serial operation or prior to the above serial operation, in each electric station A, B and C at power failure operation or charge operation. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a monitoring control system for a plurality of electric stations, and is particularly useful for monitoring a plurality of electric devices in a plurality of electric stations connected to each other by transmission lines and performing a power failure operation or a charging operation. Is.

  FIG. 3 is an explanatory diagram conceptually showing an image of a display panel in a control station of a supervisory control system having jurisdiction over a plurality of electric stations. The figure shows a case where a plurality of power stations (substations) A and load-side power stations B and C are linked by transmission lines L1 and L2, and each power station A, B and C Is provided with a circuit breaker CB, a disconnect switch LS, a ground switch LE, an automatic recovery device ARE, and the like.

  At the time of a power failure operation of the transmission lines L1, L2 straddling between a plurality of electric stations A, B, C monitored and controlled by such a monitoring control system, the circuit breakers CB of the electric stations A, B, C are previously set by the operation at the control station. The operation is performed for each device, such as turning off in a predetermined order, and then not using the automatic restoration device ARE, turning off the disconnecting switch LS, turning on the grounding switch LE, etc. in each of the electric stations A, B, and C. Here, the automatic restoration device ARE is for automatically restoring the interrupted circuit breaker by a turning-on operation after a certain period of time has elapsed since the circuit breaker CB has been interrupted. It means stopping the function. The charging operation of the power transmission lines L1 and L2 is performed in the reverse order.

  Further, the power failure operation of the transmission lines L1 and L2 will be described in detail. As shown in FIG. 4, the control station 1 of the monitoring control system is a remote monitoring device (TC) 2 or 3 for each of the electric stations A, B and C. , 4 are used to operate each electrical device such as the circuit breaker CB, disconnector LS, grounding switch LE, and automatic recovery device ARE of each of the electrical stations A, B, and C. Since the electric stations B and C are on the load side, the circuit breaker CB of the electric station C is turned off → the circuit breaker CB of the electric station B is turned off → the circuit breaker CB of the electric station A is turned off → the electric station C Non-use of automatic restoration device ARE → No use of automatic restoration device ARE at electric station B → No use of automatic restoration device ARE at electric station A → Disconnection of disconnector LS at electric station C → Disconnector LS at electric station B Switch off → Switch off the disconnect switch LS at electric station A → Switch on the ground switch LE at power station C → Switch on the ground switch LE at power station B → Power Input of earthing switch LE of Tokoro A, and so on, after confirming the completion of one operation sequentially performs the following operations. At this time, there is no restriction on the operation order in each device after the CB is cut off at the electric station A.

  More specifically, after the operator of the control station 1 confirms the reception of the signal notifying the completion of the previous operation, the symbol mark corresponding to each electrical device on the display panel shown in FIG. The device to be operated is selected by clicking a mark, a triangle mark, a square mark, etc., and an operation button (not shown) for performing the selected predetermined operation is operated. This operation is repeated one by one every time one operation is completed for each electric device at each of the electric stations A, B, and C.

  In the operation of this type of electrical equipment, the information is accumulated while selecting the electrical equipment in the order of control, and the information is transmitted to each substation slave station at the same time, and automatic operation is performed for each slave station. The literature which discloses the technique to perform is publicly known (refer patent document 1).

JP 08-346996 A

  However, in the prior art, all operations associated with operations such as power outages are sequentially performed while confirming the completion of each operation for each device for each operation. It takes time. Moreover, although each apparatus is selected in the control order, the probability of an erroneous operation increases as the screen of the display panel becomes complicated in a multi-terminal system.

  By the way, the device to be operated has a predetermined operation order such as a circuit breaker CB, for example, and must comply with the operation order, automatic recovery device ARE, disconnect switch LS, ground switch There are two types, such as LE, which have no special restrictions on the operation order as long as certain conditions are satisfied.

  Furthermore, the technique disclosed in Patent Document 1 cannot be applied to operations that require links with other electric stations A, B, and C, such as power failure operations of the transmission lines L1 and L2.

  In view of the above prior art, the present invention rationalizes a series of operations involving the operation of each electric device at each electric station in a short time, such as a power failure operation of a power transmission line across a plurality of electric stations interconnected by a power transmission line. It is an object of the present invention to provide a monitoring and control system for a plurality of electric stations that can be performed automatically.

In order to achieve the above object, the first aspect of the present invention provides:
A monitoring control system for a plurality of electric stations that respectively monitors a plurality of electric devices of a plurality of electric stations that are interconnected by a power transmission line and collectively controls a power failure operation or a charging operation at one control station,
Sequential operation control means for sequentially operating the electrical devices to be operated in a predetermined operation order at each electric station during a power failure operation or a charging operation, in a predetermined order;
The control station has a collective operation control means for collectively operating electric devices that are allowed to perform the collective operation after the sequential operation is completed at each electric station during a power failure operation or a charging operation or before the sequential operation. It is in the supervisory control system of a plurality of electric stations characterized by the above.

The second aspect of the present invention is:
In the supervisory control system for a plurality of electric stations described in the first aspect,
The electric equipment to be operated in the predetermined operation sequence includes a circuit breaker, and is in a plurality of electric station monitoring and control systems.

The third aspect of the present invention is:
In the supervisory control system for a plurality of electrical stations described in the first or second aspect,
The electrical equipment that is allowed to perform the collective operation includes at least one of a disconnect switch, a ground switch, and an automatic recovery device.

The fourth aspect of the present invention is:
In the monitoring control system for a plurality of electric stations according to any one of the first to third aspects,
The electrical equipment that is allowed to perform the collective operation includes a relay, and the operation of the relay includes a setting and changing operation of the operation time of the relay.

According to a fifth aspect of the present invention,
In the supervisory control system for a plurality of electric stations according to any one of the first to fourth aspects,
The control station comprises a display panel,
By selecting a power transmission line related to a power outage or charging operation on the display panel, an electric device that performs sequential operation in the power outage or charging operation and an electric device that can be collectively operated are displayed in a dialog on the display panel. Display
The sequential operation is performed on the electric devices in each electric station in a predetermined order by operating a predetermined operation button after selecting the electric devices to be operated in the dialog, and the collective operation is performed in the batch operation. A plurality of electrical stations are characterized in that the electrical equipment to be operated is selected in the dialog and then a predetermined operation button is operated to collectively perform the electrical equipment at each electrical station. In the control system.

  According to the present invention, the electric devices that should be operated in a predetermined operation order and the electric devices that can be operated in a batch are grouped, and the electric devices that can be operated in a batch are collected together. The operation time can be shortened accordingly. Further, since the number of operations is reduced by the collective operation, the probability of erroneous operation is also reduced.

  Furthermore, for example, the operation of changing the operation time of the relay accompanying the operation of the circuit breaker can be automatically performed as an operation that continues after the circuit breaker is turned off, for example. Can be continued at an ideal timing.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing a monitoring control system for a plurality of electric stations according to the present embodiment. The supervisory control system is an improvement of the supervisory control system according to the prior art shown in FIG. Therefore, in FIG. 1, the same parts as those in FIG.

  As shown in FIG. 1, the control station 11 according to the present embodiment is different from the prior art in that it includes a sequential operation control unit 11A and a collective operation control unit 11B. However, the display board is the same as that shown in FIG. Therefore, FIG. 3 is used for the description of the display panel in this embodiment. Also in this embodiment, the electric station A is the power source side, and the electric stations B and C are the load side.

  The sequential operation control unit 11A sequentially operates electrical devices to be operated in a predetermined operation order at each of the electric stations A, B, and C during a power failure operation or a charging operation in a predetermined order. Further, the collective operation control unit 11B allows the collective operation at each of the electric stations A, B, and C at the time of the power failure operation or the charge operation after the sequential operation is completed at the time of the power failure operation and prior to the sequential operation at the time of the charge operation. Operate all electrical devices at once. Here, the electric device to be operated in a predetermined operation order is, for example, the circuit breaker CB. In addition, the electrical devices that are allowed to be collectively operated are, for example, the automatic restoration device ARE, the disconnect switch LS, the ground switch LE, and the like.

  At the time of a power failure operation of the transmission lines L1 and L2 across a plurality of electric stations A, B, and C monitored and controlled by the monitoring control system, the electric stations A, B, and C are operated by the sequential operation control unit 11A of the control station 11. The circuit breaker CB is cut in a predetermined order, and then the automatic recovery device ARE is not used in each of the electric stations A, B, C by the operation in the collective operation control unit 11B of the control station 11, the disconnector LS is turned off, Each operation such as turning on the ground switch LE is performed for each device at once. The charging operation is performed in the reverse order.

  That is, as shown in FIG. 1, the supervisory control system is connected to each of the automatic restoration devices ARE, disconnectors LS, grounding switches LE, etc. of the electric stations A, B, C via the remote monitoring devices 2, 3, 4. In this embodiment, since the electric station A is on the power source side and the electric stations B and C are on the load side, in the case of a power failure, the circuit breaker CB of the electric station C is first turned off via the sequential operation control unit 11A. → The circuit breaker CB at the electric station B is turned off → The circuit breaker CB at the electric station A is turned off in this order. This is because the order of operations is a predetermined operation. After such a series of sequential operations is completed, operations such as non-use of the automatic restoration device ARE of the electric stations A, B, and C, disconnection of the disconnector LS, and entry of the ground switch LE are performed via the collective operation control unit 11B. For each device at the same time. Here, “collective operation” means collective operation for the same kind of equipment (for example, disconnector LS) at each of the electric stations A, B, C, and two or more kinds of equipment (for example, disconnector LS). It does not mean collective operation for the earth switch. Incidentally, the automatic restoration device ARE, disconnector LS, and earthing switch LE of each electric station A, B, and C can be collectively operated for each of the same type of devices, but at the time of power failure, the disconnector LS, earthing switch It is necessary to operate in the order of LE. Moreover, it is necessary to link the operation for each electric station A, B, C for each batch operation.

Such a series of operation procedures will be described in more detail based on the flowchart shown in FIG.
1) First, a power transmission line (power transmission line L1 in this example) for performing a power failure operation is clicked and selected on the display panel shown in FIG. 3 (see step S1).

2) At this time, the dialog D is displayed on the display panel (see step S2).

3) In the dialog D, click the operation button 12 for performing the operation in which the order is determined in advance, for example, the operation of the circuit breaker CB, and select the order operation (see step S3).

4) The terminal information is confirmed at the control station 11 (see step S4). Here, the “terminal” refers to a connection point between the transmission lines L1 and L2 and the electric stations A, B, and C. “Confirmation of terminal information” means a tidal current, a simulation result of a power failure operation, and the like. If OK, creation or display of operation procedure data is performed based on these. That is, since the screen image E is displayed on the display board, the content of the screen image E is confirmed.

5) It is confirmed whether or not the procedure is OK (see step S5). In the case of “OK”, the “OK” button of the screen image E is clicked, and in the case of “NG”, the “NG” button of the screen image E is clicked. Incidentally, in the case of “NG”, the procedure is interrupted.

6) When it is confirmed in step S5 that the procedure is “OK”, a control signal for turning off each circuit breaker CB at each of the electric stations C, B, A via the sequential operation control unit 11A Can be transmitted.

  Specifically, first, after clicking the operation button 12 of the dialog D, an “OFF” operation button (not shown; the same applies hereinafter) is clicked. As a result, a predetermined sequential operation is started, and the circuit breaker CB of the electric station C is first automatically selected, and a control signal for turning off the circuit breaker CB is transmitted. As a result, the circuit breaker CB of the electric station C is “turned off”.

  After the response “OFF” of the circuit breaker CB at the electric station C is confirmed at the control station 11, the circuit breaker CB at the electric station B is automatically selected and the same operation is performed. Similarly, after the response “OFF” of the circuit breaker CB at the electric station B is confirmed at the control station 11, the same operation is performed on the circuit breaker CB at the electric station A to obtain a similar response. Thus, a series of operations in which the order is determined in advance is automatically executed sequentially in a predetermined order by the operation of the operation button 12 and the operation button of “OFF”.

  Here, when a predetermined response does not return, the procedure is interrupted and an error message is output.

7) During a power failure operation, a predetermined operation of the circuit breaker CB is completed. After confirming this, the operation button 13 of the automatic recovery device ARE, the operation button 14 of the disconnector LS, Any one of the operation buttons 15 of the ground switch LE is clicked in the dialog D to operate a predetermined operation button. As a result, it is possible to perform a predetermined collective operation of the corresponding devices at the electric stations A, B, and C. By the way, in the case of this embodiment, it is one of the collective cut-off operation of the disconnect switch LS, the collective turn-on operation of the ground switch LE, and the collective non-use operation of the automatic recovery device ARE.

  Here, as described above, the automatic restoration device ARE, the disconnect switch LS, and the ground switch LE of each of the electric stations A, B, and C can be collectively operated for each of the same type of devices, but the operation at the time of power failure Then, it is necessary to operate in the order of the disconnector LS and the ground switch LE. Moreover, it is necessary to link the operation for each electric station A, B, C for each batch operation. However, the specific contents of each operation are the same when any device such as the automatic restoration device ARE, the disconnect switch LS, and the ground switch LE is targeted.

  Therefore, the following procedure will be described by taking as an example the case where the target of the collective control is the disconnector LS, as ensuring the proper securing of the mutual order of the collective operations.

  That is, the operation button 14 in the dialog D for selecting the collective operation of the disconnector LS is clicked to select the collective operation (see step S7).

8) The terminal information is confirmed at the control station 11 (see step S8). “Confirmation of terminal information” in this case means an operation of the disconnector LS, and therefore means confirmation of interlock conditions, etc., assuming that the circuit breaker CB is “off”. Based on these, procedure data is created or displayed. That is, since the screen image F is displayed on the display board, the content of the screen image F is confirmed.

9) It is confirmed whether or not the procedure is OK (see step S9). In the case of “OK”, the “OK” button of the screen image F is clicked, and in the case of “NG”, the “NG” button of the screen image F is clicked. Incidentally, in the case of “NG”, the procedure is interrupted.

10) When it is confirmed in step S9 that the procedure is “OK”, collective control for turning off the respective disconnectors LS at the electric stations A, B, C via the collective operation control unit 11B The signal is transmitted and the response is confirmed (see step S10). Here, when a predetermined response does not return, the procedure is interrupted and an error message is output.

  Similarly, for the ground switch LE and the automatic recovery device ARE, a predetermined batch operation can be performed in the same manner by performing the processing from step S7 to step S10. Here, in the case of collective operation of the automatic recovery device ARE, the operation button 13 is clicked, and in the case of collective operation of the ground switch LE, the operation button 15 is clicked to perform collective selection, and then a predetermined operation button is selected. Just operate.

11) Thus, the sequential operation and the collective operation are completed (see step S11).

<Other embodiments>
Another electrical device that can be used in batch operation is a relay. In particular, a transmission system having a pair of transmission lines L1 and L2 as shown in FIG. 3 is provided with auxiliary protection (distance relay or ground fault direction relay, etc.) as well as main protection (line selection relay, etc.). Here, the main protection is intended to detect an accident of the own line transmission line L1 or L2 and to isolate the accident point at an early time limit.

  On the other hand, retrofit protection is intended to operate when the main protection malfunctions or when the relay of the next section transmission line malfunctions. Therefore, in general, the operation time is set such that the accident point is separated in a time period longer than the main protection.

  In the case of having such a protection system, when the main protection relay is not used due to work or equipment failure, it is necessary to protect the transmission lines L1 and L2 with a backup protection relay. Therefore, when this mode is entered, it may be necessary to change the operating time of the backup protection relay.

  As an embodiment of the present invention in such a case, when the non-use of the main protection relay is confirmed at the control station 11, the operating time of the corresponding protection protection relay is changed at each electric station A, B, C. A configuration in which the timer setting is changed in a batch operation is conceivable. In other words, it is possible to link the main protection relay and perform necessary settling of the operation time of the backup protection relay in a lump.

  By the way, the setting change of the timer in the prior art has sequentially changed the setting of the timer of each protection protection relay. Therefore, the time cooperation temporarily collapsed during this period, and this setting work also took a lot of time.

  The present invention can be used in the industrial field where maintenance and inspection of electric power equipment is performed.

It is a block diagram which shows the monitoring control system of the some electric station which concerns on embodiment of this invention. It is a flowchart which shows the operation procedure of the monitoring control system shown in FIG. It is explanatory drawing which shows notionally the image of the display panel in the control station of the monitoring control system of several electric power stations. It is a block diagram which shows the monitoring control system of the some electric station which concerns on a prior art.

Explanation of symbols

11 Control Station 11A Sequential Operation Control Unit 11B Collective Operation Control Unit LS Disconnector A, B, C Electrical Station D Dialog L1, L2 Transmission Line ARE Automatic Recovery Device CB Breaker LE Grounding Switch

Claims (5)

A monitoring control system for a plurality of electric stations that respectively monitors a plurality of electric devices of a plurality of electric stations that are interconnected by a power transmission line and collectively controls a power failure operation or a charging operation at one control station,
Sequential operation control means for sequentially operating the electrical devices to be operated in a predetermined operation order at each electric station during a power failure operation or a charging operation, in a predetermined order;
The control station has a collective operation control means for collectively operating electric devices that are allowed to perform the collective operation after the sequential operation is completed at each electric station during a power failure operation or a charging operation or before the sequential operation. A monitoring and control system for a plurality of electrical stations. The supervisory control system for a plurality of electric stations according to claim 1,
A monitoring control system for a plurality of electrical stations, wherein the electrical equipment to be operated in the predetermined operation sequence includes a circuit breaker. In the supervisory control system for a plurality of electric stations according to claim 1 or claim 2,
A plurality of electrical station monitoring and control systems characterized in that the electrical equipment that can be collectively operated includes at least one of a disconnect switch, a ground switch, and an automatic recovery device. In the supervisory control system for a plurality of electric stations according to any one of claims 1 to 3,
The electrical equipment that is permitted to perform the collective operation includes a relay, and the operation of the relay includes an operation of changing the operating time of the relay. The supervisory control system for a plurality of electric stations according to any one of claims 1 to 4,
The control station comprises a display panel,
By selecting a power transmission line related to a power outage or charging operation on the display panel, an electric device that performs sequential operation in the power outage or charging operation and an electric device that can be collectively operated are displayed in a dialog on the display panel. Display
The sequential operation is performed on the electric devices in each electric station in a predetermined order by operating a predetermined operation button after selecting the electric devices to be operated in the dialog, and the collective operation is performed in the batch operation. A plurality of electrical stations are characterized in that the electrical equipment to be operated is selected in the dialog and then a predetermined operation button is operated to collectively perform the electrical equipment at each electrical station. Control system.

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