JPH0993783A - Method and apparatus for setting set value of radio ct - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically set a radio CT to a new setting by detecting that the radio CT not operated is then operated depending on the connected and disconnected condition of the circuit breaker and disconnecting circuit to which the radio CT is connected. SOLUTION: An input section 25, to which the on-off conditions of a circuit breaker 2, a disconnection circuit 6 in one side and a disconnection circuit 7 in the other side are input, is provided. A detector 26 is also provided for detecting whether condition change to 'on' from 'off' of the circuit breaker 2, disconnecting circuit in one side 6 and disconnection circuit in the other side 7 is generated or not, and whether the circuit breaker 2, disconnecting circuit in one side 6 or disconnection circuit in the other side 7 are in the 'on' state or not when any one of such condition change is generated. Moreover, a setting operation means 22 is also provided for setting the radio CT 8 in one side to the preset value when both circuit breaker 2 and disconnection circuit in one side 6 are in the 'on' state, or the set value of the radio CT 9 in the other side when both circuit breaker 2 and disconnection circuit in the other side 7 are in the 'on' state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for setting a set value of a wireless CT in an accident point locating device for locating an accident point in a power system.

[0002]

2. Description of the Related Art FIG. 3 shows an example of a conventional accident point locating device, which is a branch busbar 5 connecting an A bus 3 and an Otsu bus 4.
Is connected to a power transmission line 1 provided with a circuit breaker 2, and between this connecting portion and the upper busbar 3 and between the connecting portion and the second busbar 4, the upper-side disconnector 6 and the second-side disconnector are connected. Each of the devices 7 is provided to form a double bus system. An A-side radio CT 8 and an A-side radio CT 9 are provided between the A-bus 3 and the A-side disconnector 6, and between the O-bus 4 and the A-side disconnector 7, respectively. Ground stations 10 and 11 are provided on the ground corresponding to the instep side wireless CT8 and the outside side wireless CT9, respectively. The ground stations 10 and 11 are connected to an orientation section 13 having a setting operation section 12.

In such an accident point locating device, when an accident occurs on the upper bus 3 or the second bus 4, the locating unit 13 detects this accident by the output from a protection relay (not shown), and the locating unit 13 is on the ground. A command is output to the wireless CTs 8 and 9 via the stations 10 and 11. Based on this command, the wireless CTs 8 and 9 output accident determination data to the orientation section 13 via the ground stations 10 and 11, and the orientation section 13 locates the accident point.

The wireless CTs 8 and 9 are used as their power sources.
The branch bus 5 is used. However, in the above-mentioned double bus system, one of the disconnectors 6 and 7 is normally in the "off" state, and the power transmission line 1 is electrically connected to either the instep bus 3 or the Otsu bus 4. Be driven. Therefore, when the power transmission line 1 is connected to the upper bus 3 with the second-side disconnector 7 in the "off" state, the second-side wireless CT8 operates and the second-side wireless CT9 does not operate. Similarly, when the instep side disconnector 6 is in the “OFF” state and the power transmission line 1 is connected to the Otsu bus line 4, the Otsu side wireless CT 9 operates and the A side wireless CT 8
Does not work.

On the other hand, in the wireless CTs 8 and 9, normally,
A preset value such as a current threshold value is set in advance, and an accident determination is performed by determining whether or not the current value flowing through the branch bus bar 5 exceeds the preset value.
In this case, the set value is determined by the system condition connected to the power transmission line 1. Therefore, when the system condition is changed, the set value also needs to be changed to a new set value. Therefore, by operating the setting operation unit 12 of the orientation unit 13, the set values of the wireless CTs 8 and 9 can be set to new set values via the ground stations 10 and 11.

[0006]

However, as described above, since either one of the wireless CTs 8 and 9 is not operating, the set value of the wireless CTs 8 and 9 not operating cannot be changed. Therefore, this wireless CT that is not operating
When the setting values of 8 and 9 were changed, the wireless bus C that was not operating after switching between the upper bus 3 and the second bus 4
Wait until T8,9 becomes operational, then
It is necessary to set the setting values of the wireless CTs 8 and 9 to new setting values via the ground stations 10 and 11 by operating the setting operation unit 12 of the orientation unit 13. Therefore, for the wireless CTs 8 and 9 that are not operating, it is necessary to always pay attention to the switching of the instep bus 3 or the Otsu bus 4 so as not to forget to change the setting values of the wireless CTs 8 and 9. In addition to the complicated work, there is a drawback that a malfunction occurs when the setting value is forgotten to be changed.

The wireless CTs 8 and 9 that were not operating
If the wireless CTs 8 and 9 can be automatically output to the locating unit 13 when the wireless CTs 8 and 9 operate, it is possible to automatically change the set values of the wireless CTs 8 and 9. However, as described above, the wireless CT8,
9 operates based on a command from the orientation unit 13, and it is not possible to automatically output to the orientation unit 13 that the wireless CTs 8 and 9 have become operable. As a result, the conventional accident point In the orientation device, it was difficult to automatically change the set values of the wireless CTs 8 and 9.

Therefore, the present invention detects that the wireless CT, which has not been operated due to the ON / OFF state of the circuit breaker and the disconnector to which the wireless CT is connected, is activated, and accordingly, the wireless CT is set. The purpose is to be able to automatically set the value to a new set value.

[0009]

According to a first aspect of the invention, a transmission line provided with a circuit breaker is connected to a branch bus line connecting an A bus line and an O-bus line. Between the above-mentioned disconnection device and the above-mentioned other side disconnector, and between the above-mentioned mother bus line and the above-mentioned other-side disconnector, and between the above-mentioned mother bus line and the above-mentioned other-side disconnector An instep side wireless CT and an outside side wireless CT are respectively provided between the equipment and the wireless side C by a command from the orientation section.
In an accident point locating device for locating an accident point by transmitting the output of T to the locating section via a ground station, the on / off state of the circuit breaker, the instep side disconnector and the other party side disconnector is located in the locating state. It is detected whether or not there is a state change from “OFF” to “ON” of the circuit breaker, the instep side disconnector and the second side disconnector, and any one of these state changes is detected. When it occurs, it is detected whether both the circuit breaker and the instep side disconnector or the second side disconnector are "ON", and both the circuit breaker and the instep side disconnector are "ON". In case of the above, the set value of the side A wireless CT is set, and when both of the circuit breaker and the other side disconnector are “ON”, the set value of the other side wireless CT is set to the set value preset in the orientation section. To do.

According to the second aspect of the present invention, a power transmission line provided with a circuit breaker is connected to a branch bus connecting the upper bus and the second bus, and the connecting portion is connected to the upper bus and the connecting portion. Between the and the Otomo Line, the instep side disconnector and the Oto side disconnector are respectively provided, and between the Kotobus and the Instep side disconnector and between the Otobus line and the Oto side disconnector, In the accident point locating device, which is provided with an instep side wireless CT and an instep side wireless CT, and transmits the outputs of these wireless CTs to the locating part via the ground station in response to a command from the locating part and locates the accident point An input unit for inputting the on / off state of the circuit breaker, the instep side disconnector and the second side disconnector, and the output from this input unit, the circuit breaker, the instep side disconnector and the second side disconnector Whether the state change of the container from "OFF" to "ON" has occurred When it detects, and if any one of this state change occurs, a detection unit that detects whether the circuit breaker and the instep disconnector or the other disconnector are both “ON”. , By the output from this detector,
When both the circuit breaker and the instep side disconnector are “ON”, the setting value of the instep side wireless CT is set, and when both the circuit breaker and the other side disconnector are “ON”, the other side wireless CT is set. A setting operation unit that sets a set value to a preset set value is provided.

In the present invention, it is detected that the wireless CT, which was not operating, is activated by the ON / OFF state of the circuit breaker and the disconnecting switch to which the wireless CT is connected. When the CT comes into operation, it can be automatically set to a new set value. Therefore, it is not always necessary to pay attention to the switching of the Kobusen or Otsubusen and to remember to change the setting value of the wireless CT that is not operating, and it is possible to prevent malfunction due to forgetting the change.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram showing an embodiment of a wireless CT set value setting device of the present invention, and FIG. 2 is a flow chart for explaining the operation thereof. In FIG. 1, reference numeral 24 is a contact input unit, and the ON / OFF state of each of the circuit breaker 2, the instep side disconnector 6 and the second side disconnector 7 is input, and the information is the contact input unit. Input from 24 to the input unit 25 of the orientation unit 23. The detection unit 26 detects from the output from the input unit 25 whether or not the state change of the circuit breaker 2, the instep side disconnector 6 and the second side disconnector 7 from “OFF” to “ON” has occurred, and When any one of the state changes occurs, it is detected whether or not both the circuit breaker 2 and the instep side disconnector 6 or the other side disconnector 7 are “ON”. Setting operation unit 22
Is formed so that the setting values of the wireless CTs 8 and 9 can be changed in the same manner as the conventional setting operation unit 12, and the detecting unit 26
When both the circuit breaker 2 and the instep side disconnector 6 are “ON”, the set value of the instep side wireless CT 8 is
When both and the other side disconnector 7 are “ON”, the other side wireless C
The set value of T9 is set to a preset set value via the ground stations 10 and 11.

Next, the operation of the above embodiment will be described. First, a method of setting the set values of the wireless CTs 8 and 9 when the power transmission line 1 is operated by the instep bus 3 will be described. When the power transmission line 1 is operated by the upper bus 3, the circuit breaker 2 is in the “ON” state, the instep side disconnector 6 is in the “ON” state, and the B side disconnector 7 is in the “OFF” state. The ON / OFF state of is input to the input unit 25 of the orientation unit 23 via the contact input unit 24. The in-vehicle radio CT 8 is operating and the in-vehicle radio CT 9 is not operating. At this time, when it is desired to change the setting values of the wireless CTs 8 and 9, the setting operation unit 22 of the orientation unit 23 sets a new setting value. Instep radio C
Since T8 is operating, the instep radio CT8 is set to a new set value via the ground station 10 by a command from the setting operation unit 22.

On the other hand, since the second party wireless CT9 is not operating, a new setting value cannot be set in this state, but since the second party wireless CT9 is not operating originally,
Even if it cannot be set at this point, there is no problem. As described below, the transmission line 1 is switched from the instep bus line 3 to the Otsu bus line 4, operated by the Otsu bus line 4, and the Otsu side wireless CT 9 operates. When this happens, the new set value is automatically set.

The switching of the power transmission line 1 from the instep bus 3 to the Otsu bus 4 may be switched between a power failure and an uninterrupted power. Therefore, each will be described with reference to FIG.
First, when the transmission line 1 is cut off and then the switching is made from the instep bus line 3 to the Otsu bus line 4, the circuit breaker 2 is operated from "ON" to "OFF", and the instep side disconnector 6 is switched from "ON". It is operated to “OFF”, and this ON / OFF state is input through the contact input unit 24 to the input unit 25.
(Step 101). In this case, the circuit breaker 2
Since the detection unit 26 detects that the state change of the instep side disconnector 6 is not the state change from "OFF" to "ON", the process returns to Step 101 (Step 102).

Next, when the B-side disconnector 7 is operated from "OFF" to "ON", this ON / OFF state is input to the input section 25 via the contact input section 24 (step 101). In this case, since the detection unit 26 detects that the state change of the second-side disconnector 7 is a state change from “OFF” to “ON”, the process proceeds to Step 103 (Step 102). At this time, the second side disconnector 7 is in the "ON" state, but the circuit breaker 2 is in the "OFF" state, and neither is the "ON" state.
Since the B-side wireless CT9 is not detected, and the instep-side wireless CT8 is not detected, the step 10 is performed.
Return to 1 (steps 103 and 104).

Next, when the circuit breaker 2 is operated from "OFF" to "ON", this ON / OFF state is input to the input section 25 via the contact input section 24 (step 101). At this point, since the switching from the upper bus 3 to the second bus 4 is completed, the second wireless CT 9 is ready to operate. In this case, since the detection unit 26 detects that the state change of the circuit breaker 2 is the state change from “OFF” to “ON”, the process proceeds to Step 103 (Step 102). At this time, the detection unit 26 detects that both the circuit breaker 2 and the second-side disconnector 7 are in the "ON" state, so the second-side wireless CT 9 is detected (steps 103 and 104). In addition, the side wireless CT
No. 8 is not detected because the instep-side disconnector 6 is in the "OFF" state.

Next, the detected second party wireless CT9 is set to a new set value through the ground station 10 by a command from the setting operation section 22 (step 105). ). As described above, in the case where the power line 1 is cut off and the Kou bus line 3 is switched to the Otsu bus line 4,
The second party wireless CT9 will be automatically set to the new setting value.

On the other hand, in the case of switching from the upper bus 3 to the second bus 4 without power failure of the power transmission line 1, the circuit breaker 2 remains in the "on" state and the second disconnector 7 turns from "off" to "on". Is operated. In this case, the step is exactly the same as when the Otsu side disconnector 7 is operated from "OFF" to "ON" in the case of switching from the A line 3 to the O line 4 after the power transmission line 1 is cut off. Going through 101 to step 105, the second party wireless CT 9 is set to a new setting value.

Next, the instep side disconnector 6 is operated from "ON" to "OFF", but since the instep side disconnector 6 is not in the state change from "OFF" to "ON", the process proceeds to step 102. Then, the process returns to step 101. Therefore, even when the power line 3 is switched to the second bus 4 without the power failure of the power transmission line 1, the second wireless CT 9 is automatically set to a new set value.

In the case where the power transmission line 1 is operated by the Otsu bus line 4 and the Otsu bus line 4 is switched to the A bus line 3, the above-mentioned power transmission line 1 is operated by the A bus line 3 and the A bus line 3 is operated. Since it is exactly the same as the case of switching from O to bus 4, it will not be described.

[0022]

As described in detail above, according to the present invention,
When it is desired to change the setting value of the wireless CT, the wireless CT which is operating can be immediately set to the new setting value, and the wireless CT which is not operating can be operated. When it becomes, it can be automatically set to a new setting value. Therefore, it is not always necessary to pay attention to the switching of the Kobusen or Otsubusen and to remember to change the setting value of the wireless CT that is not operating, and it is possible to prevent malfunction due to forgetting the change.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of a wireless CT set value setting device of the present invention.

FIG. 2 is a flowchart for explaining the operation.

FIG. 3 is a configuration diagram of a conventional accident point locating device using a wireless CT.

[Explanation of Codes] 1 Transmission line 2 Circuit breaker 3 Ko Bus 4 Otsu bus 5 Branch bus 6 Instep side disconnector 7 Otsu side disconnector 8, 9 Wireless CT 10, 11 Ground station 22 Setting operation unit 23 Orientation unit 24 Contact input Part 25 Input part 26 Detection part

Claims (2)

[Claims] 1. A branch bus connecting the Kobus and Otsubus,
A transmission line provided with a circuit breaker is connected, between this connection portion and the above-mentioned bus line and between the above-mentioned connection portion and the above-mentioned O-bus line, an A-side disconnector and an O-side disconnector are respectively provided,
An A-side radio CT and an O-side radio CT are provided between the A-bus and the A-side disconnector and between the O-bus and the A-side disconnector, respectively, and these radios are transmitted by a command from the orientation section. In an accident point locating device for locating an accident point by transmitting the output of CT to the locating section via a ground station, the on / off state of the circuit breaker, the instep side disconnector and the second side disconnector is located in the locating position. It is detected whether or not there is a state change from “OFF” to “ON” of the circuit breaker, the instep side disconnector and the second side disconnector, and any one of these state changes is detected. When it occurs, it is detected whether or not both the circuit breaker and the instep side disconnector or the second side disconnector are "ON", and both the circuit breaker and the instep side disconnector are "ON". In case of the above, the set value of the wireless CT on the instep side is set to the circuit breaker and the second side disconnector. When both are “ON”, the setting value of the wireless CT on the second side is set to the setting value preset by the orientation section. 2. A branch bus connecting the Kobus and Otsubus,
A transmission line provided with a circuit breaker is connected, between this connection portion and the above-mentioned bus line and between the above-mentioned connection portion and the above-mentioned O-bus line, an A-side disconnector and an O-side disconnector are respectively provided,
An A-side radio CT and an O-side radio CT are provided between the A-bus and the A-side disconnector and between the O-bus and the A-side disconnector, respectively, and these radios are transmitted by a command from the orientation section. In the accident point locating device that transmits the output of CT to the locating unit via a ground station and locates the accident point, the on / off states of the circuit breaker, the instep side disconnector and the second side disconnector are input. The input section and the output from this input section to detect whether or not the state change of the circuit breaker, the A-side disconnector and the B-side disconnector from “OFF” to “ON” has occurred, and When any one of these state changes occurs, a detection unit that detects whether or not both the circuit breaker and the instep-side disconnector or the second-side disconnector are "ON", and this detector From the output from both the circuit breaker and the instep disconnector The set value of the back side wireless CT when the "the circuit breaker and the Party B-side disconnector are both" On "
In the case of, a setting operation unit for setting the setting value of the second party wireless CT to a preset setting value, and a setting value setting apparatus of the wireless CT.