JPS644418B2 - - Google Patents

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention provides operation control of a switching switch in a power system that enables appropriate switching operations and improves reliability thereof. Regarding equipment.

(Prior Art) In general, power transmission lines in power systems that meet the following conditions are often equipped with a changeover switch (hereinafter referred to as 43GS) at each terminal to switch between the power transmission and reception ends.

(1) A low-speed reclosing device is installed, and this is used to attempt automatic recovery in the event of a power outage.

(2) For power system operation, the direction of power flow in power transmission lines;
In other words, if the sending end and the receiving end are reversed from time to time.

And, in the transmission line where 43GS is installed,
The actual power flow direction must match the 43GS power transmission and reception directions. This is necessary for the low-speed reclosing device to operate correctly in the event of a transmission line accident, and is also necessary for operators to understand the system operation status and create manual recovery procedures in the event of an accident.

Figure 1 shows a typical configuration of a power system with such 43GS installed.
are each terminal of the power system. 1A and 1B are 43GS installed on the terminal A and B sides respectively, and the disconnectors 2A and
It is connected to the respective terminals A and B via 2B and sheath disconnectors 3A and 3B, respectively. 4 is each 43GS1A,
A switch installed between 1B and 1B in the middle of the line, which allows each terminal A and B to be interconnected, and
The disconnectors 2A, 2B and the sheath disconnectors 3A, 3B are respectively grounded. In addition, in the diagram, power transmission lines 5L and 6L are separated by disconnectors or disconnectors.
will be referred to as a node in the following description.

On the other hand, FIG. 2 is a block diagram showing the system configuration of the conventional 43GS operation control device, and in the figure, indicates the control center and the controlled center, respectively.
In the control center, 7 is an operator console equipped with a system monitoring panel, etc., which constantly displays status signals of equipment such as power system disconnectors, disconnectors, 43GS, etc. transmitted from the controlled station side. In response to an operation by an operator, a 43GS operation request command S1, which will be described later, is transmitted to the controlled station via the remote monitoring and control devices 8 and 9. On the other hand, on the controlled station side, reference numeral 10 is the above-mentioned power system, and the switching operation of 43GS is performed based on the operation request command S1 transmitted from the control station side via the remote monitoring and control device 9. Further, status signals S2 of power system equipment such as a disconnector, disconnector, 43GS, etc. are transmitted from the power system 10 to the operator console 7 via the remote monitoring and control devices 9 and 8.

In such a configuration, conventionally, an operator at the control center receives the status of each device transmitted from the power system 10 through the remote monitoring and control devices 9 and 8 to the system monitoring panel provided in the operator console 7, or as the case may be. In this case, it is confirmed by telephone contact or the like, and after determining whether or not it is possible to perform the switching operation of the 43GS in the electric power system 10, the operation is performed. In this case, this
Judgment as to whether the 43GS switching operation is possible or not is made based on the following conditions. In other words, first 43GS
The operation is considered valid (possible) when any one of the following conditions is satisfied.

(a) When switching the 43GS from the "power transmitting end" to the "power receiving end" side.

(b) If the terminal or disconnector on the side where the operation is to be performed is in the "open" state.

(c) When there are no other terminals. Or if there is no connection with other nodes.

(d) When the other terminals and disconnectors of all the connected nodes are "open", or when "closed", the other terminal 43GS is in the direction of the "power receiving end".

On the other hand, the operation of 43GS is considered to be illegal (impossible) when all of the above conditions (a) to (d) are not satisfied. In other words, when you try to switch the own terminal 43GS to the "power transmission end" side, if the node or disconnector of the connected node is "closed" and there is another terminal where 43GS is the power transmission end. It is.

(Problems to be Solved by the Invention) As described above, conventionally, it has been determined whether or not the 43GS can be operated based on the above conditions. By the way, the decision as to whether or not such a 43GS switching operation is legal is left entirely to the operator. Therefore, for example, if an operator mistakenly checks the system monitoring panel, it may be determined that the other terminal of the power system's power transmission line is not the "transmission end" even though it is. If the 43GS is switched from the "receiving end" to the "transmitting end" side, the low-speed reclosing device described above may not operate properly in the event of a system fault, or the operator may This will cause trouble in the operation of the power system, such as the inability to accurately monitor the system, and the 43GS will not be able to perform its functions, resulting in improper operation.

The purpose of the present invention is to prevent improper operations due to operator confirmation, to correctly switch between the sending end and the receiving end of power transmission lines in the power system, and to contribute to stable system operation. An object of the present invention is to provide an operation control device for a switching switch in an electric power system.

[Structure of the Invention] (Means for Solving the Problem) In order to achieve the above object, the present invention provides a switching switch installed at each terminal of a power transmission line in a power system to switch between a power transmission end and a power reception end. An operation control device that performs a switching operation to the "power transmitting end" side or "power receiving end" side based on an operation request command from the operator console, ”
an operation direction determining means for determining whether the operation is toward the side or the "power receiving end" side, and when the determination result by the operation direction determining means is that the operation is toward the "power receiving end" side, the operation is permitted. and outputs an operation command to that effect, and when the determination result is an operation to the "transmission end" side, performs an interlock check on the status of each device in the power system based on predetermined determination conditions, As a result, it was determined that other terminals of the power transmission line in the power system (terminals other than the terminal on the side where the switching operation is to be performed) were not designated as the "transmission end", so the operation was permitted and a notification to that effect was determined. The apparatus also includes an interlock check means for outputting operation commands.

(Function) Therefore, in the operation control device of the present invention, when an operation request command is given from the operator console, the content of the operation request command is an operation to the "power transmitting end" side, but it is not possible to perform the operation to the "power receiving end" side. The operation direction determining means determines whether the operation is . As a result of the judgment,
When the operation is to the "power receiving end" side, a command to operate to the "power receiving end" side is output to the switching switch. On the other hand, when operating on the "transmission end" side,
The status of each device in the power system is checked by the interlock check means based on predetermined judgment conditions, and as a result, the state of each device in the power system is checked by the interlock check means based on predetermined judgment conditions. If it is determined that the terminal is not set to the "power transmission end", a command to operate to the "power transmission end" side is output to the switching switch. This allows the switching operation of the switching switch to be performed correctly.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings. Figure 3 shows the system configuration of the 43GS operation control device in block form, and the same parts as in Figure 2 are given the same symbols and their explanations are omitted.
Only the different parts will be described here. In other words, the difference between FIG. 3 and FIG. 2 is that the operation request command S1 from the operator console 7 is added to the arithmetic judgment unit 11, the details of which will be described later, and the judgment signal S
1' is added to the remote monitoring and control device 8, and the status signal S2 of each device from the power system 10 is added to the calculation/judgment section 11. Further, this calculation/judgment section 11 operates when an operator performs a switching operation for 43GS from the operator console 7.

FIG. 4 is a block diagram showing the detailed configuration of the calculation/judgment section 11. In the figure, 1
1-1 is the connection from the “power transmitting end” to the “power receiving end” or “power receiving end” added from the operator console 7.
An operation direction determination unit that operates according to an operation request command S1 from to the “power transmission end” and determines the operation direction;
When the operation direction is switched from the "power transmitting end" to the "power receiving end", the operation is permitted and the operation request command S1' is issued.
is sent to the remote monitoring and control device 8, and conversely, when switching from the "power receiving end" to the "power transmitting end", a first interlock check command S3 is sent. 11-2 is operated by the interlock check command S3 applied from the operation direction determining section 11-1, and is connected to the remote monitoring and control device 9 from the electric power system 10.
and 8, based on the device status signal S2 transmitted through 8, the own line equipment status determination unit that determines the open/closed state of the disconnector of the own terminal (the terminal on the side where the switching operation is to be performed); When the state is "open", the operation based on the contents of the operation request command S1 is permitted and the operation command S1'' is sent to the remote monitoring and control device 8, and conversely, when the state is "closed", the 2 interlock check command S4 is sent.1
1-3 operates in response to an interlock check command S4 applied from the own line equipment status determination unit 11-2, and receives equipment status signals S2 transmitted from the power system 10 via the remote monitoring and control devices 9 and 8. Based on this, the equipment status determination section on the track examines the open/closed status of switches on the track and creates a node matrix.
Based on the created node matrix, it is determined whether there is a connection with another node, and if the connection is "no", the operation based on the above operation request content is permitted and the operation command S1 is sent to the remote monitoring and control device 8. Conversely, when the connection is "present", the third interlock check command S5 is sent. here,
In the above, the node matrix is information on the system configuration that is obtained by examining the system configuration showing the mutual connection relationship between devices in the power system 10 based on the information S2 of the power system devices. This represents the connection between i and node j, and is expressed as a binary value of "0" and "1", where "0" means "no connection" and "1" means "existence" of connection.
11-4 is a device status signal S2 which is operated in response to an interlock check command S5 applied from the mid-line equipment status determination section 11-3 and is transmitted from the power system 10 via the remote monitoring and control devices 9 and 8.
This is a power transmitting/receiving end determination unit that determines the power transmitting/receiving end based on the following. This power transmitting/receiving end determination unit 11-4 checks the open/closed states of the shields and disconnectors of all connected nodes, and when the state is "closed", determines the state of 43GS, and determines that it is "power transmitting". If it is "in the end direction", the operation based on the contents of the operation request command S1 is prohibited, and operation prohibition information (alarm command, etc.) S6 is sent from this to the operator console 7. Conversely, if the disconnector of the node to be connected is in the "open" state or the "closed" state but the state of the 43GS is "toward the power receiving end", the operation based on the above operation content is allowed. Then, the operation command S''''' is sent to the remote monitoring and control device 8.

Note that here, the own line equipment state determination unit 11-2
The interlock check means is composed of the line midway equipment status determination section 11-3 and the power transmission/reception end determination section 11-4, and the contents of the above-mentioned check are shown in the flow diagram of FIG. .

Next, the operation of the 43GS operation control device having such a configuration will be described when applied to a two-terminal system as shown in FIG. First, in the system shown in Figure 1, 43GS1B on the terminal B side is the "transmission end".
The case of switching from the power receiving end to the "power receiving end" side will be described below. In this case, the "power transmission end" is transmitted from the operator console 7 to the operation direction determination section 11-1 of the calculation determination section 11 by the operation of the operator at the control center.
An operation request command S1 toward the "power receiving end" direction is given from the "power receiving end" direction. Then, the operation direction determination unit 11-1 operates to determine the operation direction, and as a result, in this case, since the operation direction is from the "power transmitting end" to the "power receiving end" side, the operation request command is issued. The operation of S1 is permitted, and the operation command S1' is then transmitted to the controlled station through the remote monitoring and control device 8. on the other hand,
At the controlled station, the remote monitoring and control device 9
An operation command S1' from the control center is added to
Based on this, the operation command S1' of 43GS1B is added to the power system 10, and the "transmission end" of 43GS1B is
A switching operation is performed from the terminal to the "power receiving end" direction. Thereafter, the status of each device and the 43GS are transmitted from the power system 10 through the remote monitoring and control devices 9 and 8.
The switching state signal S2 of 43GS1B is applied to the calculation/judgment unit 11 of the control center and the operator console 7, and the operator confirms the contents on the system monitoring panel, thereby completing the switching operation of 43GS1B.

Next, move 43GS1B from the “receiving end” to the “transmission end”
The case of switching to the side will be described. In this case, after checking the system monitoring panel at the control center,
When the operator determines that the switching operation to the "power transmission end" side is possible, the operation direction determination unit 1 of the calculation determination unit 11 is transmitted from the operator console 7 by that operation.
1-1 is given an operation command S1 from the "power receiving end" to the "power transmitting end" direction. Then, the operation direction is determined in the same manner as described above, and as a result, in this case, since the operation direction is from the "power receiving end" to the "power transmitting end", the operation of the operation request command S1 is not permitted, that is, The operation command S1' is not sent, and the interlock check command S3 is applied to the own line equipment state determination section 11-2. As a result, the own line equipment status determination unit 11-2 operates, and the remote monitoring and control devices 9 and 8
Based on the status signal S2 of each device transmitted through the terminal, the open/closed status of the shield breaker 3B on the B terminal side is checked. As a result, if the shield breaker 3B is in the "open" state, the switching operation of 43GS1B is permitted, and the operation command S1'' based on the contents of the operation request command S1,
In other words, an operation command from the "power receiving end" to the "power transmitting end" is applied to the remote monitoring and control device 8 and processed through the same process as described above, and the "power receiving end" of terminal B 43GS1B in the power system 10 A switching operation is performed from the power source to the "power transmitting end" direction. Further, when the shield breaker 3B is in the "closed" state in the above, its operation is not permitted and an interlock check command S4 is applied to the line equipment state determination section 11-3. As a result, the mid-line equipment state determining section 11-3 operates to check the opening/closing state of the break switch 4 on the mid-track based on the information signal S2 transmitted from the controlled station side, and performs the above-described node matrices. Tsukusu is created. Next, the connection relationship between the nodes 6L and 5L is checked using this node matrix, and if the result is that they are not connected, the switching operation of 43GS1B is permitted, and the operation command S1 based on the contents of the operation request command S1, In other words, the operation command from the power receiving end to the power transmitting end is
From this point on, it is added to the remote monitoring and control device 8, and through the same process as described above, it becomes the "power receiving end" of terminal B, 43GS1B.
A switching operation is performed from the power source to the "power transmitting end" direction. Also, when connected in the above,
The power transmitting/receiving end determination unit 11-4 disallows the operation.
An interlock check command S5 is added to the interlock check command S5. Then, as a result, the power transmitting/receiving end determination unit 11-4
operates, and the open/closed state of the other terminal A of the connected node and the disconnector 3A is checked based on the information signal S2 transmitted from the controlled station side. As a result, when the breaker 3A is in the "closed" state, the state of 43GS1A of terminal A is further checked, and if it is in the "transmission end" direction, the operation is not permitted, and information indicating that the switching operation is not allowed is determined. A signal S6 is applied to the operator console 7, and this fact is displayed on the system monitoring panel through an alarm or the like. Further, in the above, when the shield breaker 3A is in the "open" state, or even if it is in the "closed" state, when 43GS1A is in the "power receiving end" direction, the above switching operation is permitted, and the above operation request command S1 is Operation command S1 based on content
''''', that is, an operation command from the "power receiving end" to the "power transmitting end" is applied to the remote monitoring and control device 8, and through the same process as described above, the power is transmitted from the "power receiving end" of terminal B 43GS1B. A switching operation toward the "end" direction is performed. Incidentally, in any of the above cases, the operation after the switching operation of 43GS1B is performed by operation permission is exactly the same as described above. In other words, the state of the equipment is transmitted from the power system 10 through the remote monitoring and control devices 9 and 8.
The switching state signal S2 of 43GS1B is applied to the calculation/judgment unit 11 and the operator console 7 in the control center, respectively, and the operator confirms the contents on the system monitoring panel, thereby completing the switching operation of 43GS1B.

In this way, when performing a switching operation to the "power transmitting end" or "power receiving end" of the 43GS, which switches the power transmitting and receiving end of a power transmission line in a two-terminal power system, the operation direction determination unit 11-1 determines the state of the own line equipment. Determination unit 11-2, equipment status determination unit 11-3 along the track
and a power transmitting/receiving end determining section 11-4, each electrically connected power transmitting/receiving end A, B
The state of the 43GS is checked based on the predetermined interlock conditions as described above, and when the conditions are met, the operation of the 43GS is determined to be valid.
A switching operation based on an operator's operation request is permitted, and when a condition is not met, the operation is determined to be illegal, and the switching operation based on the operation request is prohibited and a warning is displayed.

Therefore, when the terminal B where the 43GS is installed and the other terminal A that can be interconnected is in a state where the power transmission end is connected, the operator may mistakenly confirm that the "power receiving" Even if a switching operation request signal command is given from the "transmission end" side to the "transmission end" side, the switching operation of the 43GS due to the request can be determined to be illegal and locked, so it is possible to prevent the switching operation due to operator's mistaken confirmation. Unfair operations can be reliably dealt with. In addition, for the reason mentioned above, operation from the 43GS "receiving end" to the "transmission end" side is permitted only when the other terminal of the power transmission line is not the transmitting end, so the actual power flow direction and the 43GS By always matching the power transmission and reception directions of the 43GS, it is possible to solve shortcomings such as the low-speed reclosing device not operating correctly in the event of a grid failure, and to effectively fulfill the functions of the 43GS. Furthermore, for the above reasons, the system operation status can be accurately grasped, contributing to stable power system operation.

It should be noted that the present invention is not limited to the above-mentioned embodiments, but can be similarly implemented in the following manner.

(1) The device of the present invention can operate on any system between adjacent electrical stations that can be electrically connected,
For example, the system shown in FIG. 6 can be similarly implemented to obtain the same effect.
In the figure, A, B, C, D are each terminal, 7A~
7D is a disconnector for each terminal, 8A to 8D are also disconnectors, 9A to 9D are 43GS, 10, 11, 1
2, 13, 14 are switches in the middle of the track, 15L~
18L is a node.

(2) The calculation/judgment unit 11 in the above embodiment can be implemented extremely economically, for example, by using a computer that is generally provided in a centralized control center of a substation.

In addition, the present invention can be modified and implemented in various ways without changing the gist thereof.

[Effects of the Invention] As explained above, according to the present invention, improper operations due to operator confirmation are prevented, and switching between the power transmission end and the power reception end of the power transmission line in the power system is properly performed, and stable operation is achieved. It is possible to provide an operation control device for a switching switch in an electric power system that can contribute to the operation of the system.

[Brief explanation of drawings]

Figures 1 and 6 are diagrams showing the configuration of the power system;
Figure 2 is a block diagram showing a conventional operation control device.
3 and 4 are configuration diagrams showing one embodiment of the present invention, and FIG. 5 is a diagram for explaining the operation of FIGS. 3 and 4. 11... Calculation determination section, 11-1... Operation direction determination section, 11-2... Own line equipment state determination section, 11
-3... Track equipment status determination section, 11-4...
Power transmitting/receiving end determination section.

Claims (1)

[Scope of Claims] 1. An operator can operate a switching switch installed at each terminal of a power transmission line in a power system to switch between the power transmission end and the power reception end to the "power transmission end" side or the "power reception end" side. In an operation control device that performs operation based on an operation request command from a console, whether the content of the operation request command from the operator console is an operation to the "power transmitting end" or the "power receiving end" side. an operation direction determination means for determining the operation direction; and when the determination result by the operation direction determination means is that the operation is to the "power receiving end" side, the operation is permitted and an operation command to that effect is output; When the operation is for the "transmission end" side, an interlock check is performed on the status of each device in the power system based on predetermined judgment conditions, and as a result, other terminals of the power transmission line in the power system (switching operation By determining that the terminal (other than the terminal on the side where the
An operation control device for a switching switch in an electric power system, comprising: interlock check means for permitting the operation and outputting an operation command to that effect.