JPS5886825A - Accident zone detecting system for power distribution line - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] The present invention relates to an accident section detection method in an automatic section opening/closing system for power distribution lines, which detects accidents at the transmission end of each section of the distribution line and automatically separates the section where the accident occurs. It is.

In recent years, accidents on high-voltage power distribution lines have been significantly reduced by insulating wires and improving the performance of power distribution equipment. Therefore, of all the accidents that occur on this type of distribution line,
The majority of accidents are failures in reclosing.

A reclosing accident generally occurs when the insulation at the accident location recovers.
Because the tracks were charged, they appeared to be in good condition, making it extremely difficult to locate the accident site.
If this condition is left untreated, insulation deterioration progresses, often resulting in a failure to reclose the circuit.

In view of these circumstances, the fault current and voltage values that flow at each point on the distribution line when an accident occurs.

Detects the direction of accidents, the number of occurrences of minor ground faults, etc.

Accident detectors that store and display these information have come into practical use. Therefore, by comparing and studying the displayed values of such accident detectors, it becomes possible to locate the accident section.

However, conventional accident detectors.

Because they are installed at the transmission end of each section of the distribution line, maintenance personnel must go to the site where the fault detector is installed in each section of the distribution line and check the memorized and displayed values, making the work complicated. It is not easy to use, and has drawbacks such as the inability to quickly determine the accident zone.

Therefore, the inventors of the present invention have conducted various studies to overcome the problems of the above-mentioned fault section detection method for distribution lines installed with conventional fault detectors, and as a result, they have installed fault detectors at the transmission end of each section of the distribution line. At the same time, a terminal device is installed to store the detected accident data of the accident detector, and a central monitoring and control device is installed at the transmission end of the distribution line on the substation side, and this central monitoring and control device and each terminal device are connected to each other on the distribution line. It has been found that the above-mentioned problems can be solved by linking the transmission lines so that they can be transmitted and received, and by centrally managing the fault section of the power distribution line and the details of the fault.

Therefore, an object of the present invention is to provide a system KTh for detecting fault sections of power distribution lines using fault detectors, centrally managing fault data detected by the fault detectors, and rapidly detecting fault sections and accident details.

An object of the present invention is to provide a fault section detection method for power distribution lines that can improve the efficiency of maintenance and inspection work.

In order to achieve the above object, in the present invention, fault detectors are provided at the transmission end of each section of the distribution line, and a terminal device is provided to store fault data detected by these fault detectors. A central supervisory control device is installed at the power transmission end of the substation, and the central supervisory control device and each terminal device are connected to each other so that they can transmit and receive data using a distribution line transport method, and each terminal device is monitored and controlled by the central supervisory control device. It is characterized by being configured to perform centralized management of accident data.

In the accident zone detection method described above, the terminal device can have a multi-circuit configuration that stores accident data detected by a plurality of adjacent accident detectors. It was. It is preferable that the terminal device obtains a predetermined power from a pole transformer, is coupled to a power distribution line via a high-voltage coupler, and is configured to transmit and receive accident data using a distribution line transmission method. In this case, a non-volatile memory is preferably used as a storage anchor for accident data in the terminal.

On the other hand, it is preferable that the central monitoring and control device is configured to be able to call and respond only to terminal devices that store specific signal accident data. E9. After the accident data is transferred from the terminal, a command to erase the memory of the accident data is sent to the terminal to erase the data stored in the terminal. Prepare for memory and meet.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a method for detecting a fault section of a power distribution line according to the present invention will be described in detail with reference to the accompanying drawings.

The first WA is a system diagram of a power distribution line showing an example of the one-line system. In FIG. 1, a power distribution line 12 led out from a substation 10 is branched and divided as appropriate to form a required power distribution line.

A fault detector 14. The terminal device 16, the high voltage coupler 18, and the pole transformer 20 are connected and arranged in a predetermined relationship. ! In addition, a central monitoring and control device 22 is connected to the power transmission end side of the power distribution line of the substation 10 via a high voltage coupler 18f.

The fault detector 14 is installed on an outdoor pole such as a branch point of a power distribution line, and detects fault current and voltage when a slight ground fault, wire breakage, or failed reclosing fault that does not result in a power outage occurs. The value, accident direction, number of occurrences, etc. are detected, stored and displayed.The detection level is determined by the system constants etc. at the installation point of each accident detector.

It is also provided for the terminal device 16IIi and the accident detector 14, and is installed on an outdoor pole, and has a function of receiving and storing each accident data signal detected by the accident detector 14. . .

Therefore, a non-volatile memory is used as the storage medium of the terminal 16 so that it can be retained even if the system is cut off due to an accident.

This terminal device 16 has one address for the accident detector 14 connected to it, and has the function of responding to a supervisory control signal from the central supervisory control device 22 and replying with the address and stored data. Equipped with a function to erase datab
The high-voltage coupler 18 is a stone that is installed on an outdoor pole and has the function of connecting the high-voltage distribution line to the power distribution line to use it as a signal transmission path and passing the signal frequency.

The pole transformer 20 is installed on an outdoor pole, and the terminal device 16
It is used to connect to power distribution lines to obtain the desired power source.

Furthermore, the central monitoring and control device 22 is installed indoors and monitors and controls each terminal device 16 that is connected to the accident detector 14 and stores accident data. Signals are transmitted and received between each section via high-voltage coupler 18. Figure 2 shows a modification of the distribution line system diagram shown in Figure 1g1. An accident detector 14 is provided at each of the accident detectors 14, and a terminal device 16 and a high voltage coupler 18 are provided for each of these accident detectors 14.
A set of pole-mounted transformers 20 are provided, and the terminal device 16 is configured to have a multi-circuit configuration so as to collectively control a plurality of fault detectors 14.

FIG. 3 is a block circuit diagram showing the basic configuration of the terminal device 16. As shown in FIG. That is, the terminal device 16 is.

The nonvolatile memory 24 includes a nonvolatile memory 24, an address selection circuit 26, and a memory erasing circuit 28, and the nonvolatile memory 24 is configured to be connected to the accident detector 14 via a detector state detection circuit 30. In addition, the nonvolatile memory 24 is configured to be connected to the high voltage coupler 1B via a transmitting circuit 32 and a coupling circuit 34, and is also connected to a signal circuit 36 via the coupling circuit 34.
is connected, and this receiving circuit 36 is connected to the address selection circuit 26.
connected to. Furthermore, each circuit K configured in this way
A power supply circuit 3B for supplying l# is provided, and this power supply circuit 38 is configured to be connected to the pole transformer 20 via a protector 40.

Next, a description will be given of the function of detecting a fault section in a power distribution line having these configurations.

Now, when a fault occurs on a part of the distribution line, one or more fault detectors 14 detect the fault, and store and display the fault data.
outputs accident data to the terminal device 16 and stores this accident data in the nonvolatile memory 24 via the detector state detection circuit 30.

On the other hand, the central monitoring and control device 22 sends a signal to call the terminal devices 16 individually or all at once when an accident occurs or at regular intervals, by transmitting a signal to call the terminal devices 16 individually or all at once using the power distribution line. The signal is received by the receiving circuit 56 of the corresponding terminal device 16, and the accident data stored in the non-volatile memory 24 is sent via the address selection circuit 26 to the central supervisory control unit 22 via the transmitting circuit 32 together with the unique address. send it back to As usual, central monitoring and control device 2
In No. 2, the accident data of each terminal device 16 is collectively and centrally managed, thereby making it possible to quickly and reliably detect the accident section and the details of the accident. In addition, in this case.

In particular, when an accident occurs, the central monitoring and control unit may send a few specific signals (
If the circuit configuration is such that only the terminal device storing the accident data responds by transmitting a command signal), the detection of the accident section becomes even easier.

After confirming the accident area and the details of the accident, the central monitoring and control device 22 sends a command to the terminal 16 of the vehicle to erase the current memory in preparation for the next accident occurrence. Therefore, this memory erasing command is received by the receiving circuit 36 of the terminal device 16,
The contents of the nonvolatile memory 24 are erased via the address selection circuit 26 and the memory erasing circuit 28, and the state after the erase is sent to the central supervisory control unit 2 via the transmitting circuit 32.
2Kiujh. The central monitoring and control device 22
receives the reply from the terminal Is based on the storage/erase command, and completes a series of accident monitoring controls.

As is clear from the above-mentioned embodiments, according to the fault section detection method of the present invention, the detection contents of the fault detectors installed at the transmission end of each section of the distribution line can be detected by the central monitoring and control device installed at the substation, etc. Since the system can be centrally managed, the accident area and accident details can be quickly and reliably determined without the need for maintenance personnel to visit and check each accident detector. Therefore, when maintenance personnel patrol power distribution lines, they can grasp the fault points and their details in advance, contributing to time and cost savings in maintenance and inspection work.

Although the preferred embodiment of the present invention has been described above, the Kiichi Akira system is not limited to the central monitoring and control of fault detectors installed at the transmission end of each section of the power distribution line, but is also applicable to pole-mounted switches. It goes without saying that the present invention can be applied as a comprehensive power distribution automation system including monitoring and control, and various other design changes can be made without departing from the spirit of the present invention.

[Brief explanation of the drawing]

FIG. 1 is a system diagram showing an embodiment of the fault section detection method for power distribution lines according to the present invention, FIG. 2 is a system diagram showing a modification of the embodiment shown in FIG. 1, and FIG. FIG. 2 is a block circuit diagram showing details of a toilet terminal in the system. 10... Substation 12... Distribution line 14... Fault detector 16... Terminal 18... High voltage coupler 20... Pole transformer 22...
...Central supervisory control device 24...Nonvolatile memory 26...Address selection circuit 28...Memory erasing circuit 30...Detector state detection circuit 32...Transmission circuit 34...Coupling circuit 56... ...Reception circuit 38...Power supply circuit 40...Safety device patent issuer Fuji Electric Manufacturing Co., Ltd.

Claims (1)

[Scope of Claims] (1) Fault detectors are provided at the transmission end of each section of the power distribution line, and a terminal device is provided to store the detected rock accident data in these fault detectors, and the terminal device is provided at the substation side of the power distribution line. A central monitoring and control device is installed at the power transmission end, and this central monitoring and control device and each terminal device are connected to each other so that they can transmit and receive data using a distribution line transportation method.The central monitoring and control device monitors and controls each terminal device to prevent accidents. An accident section detection method for a stone power distribution line, characterized in that it is configured to perform centralized data management〇 ■ In the accident section detection method according to claim 1, the terminal device is connected to a plurality of adjacent accident detectors. This is a method for detecting fault sections of power distribution lines, which consists of a multi-circuit configuration that stores frequently detected fault data. (5) #Claims [In the accident section detection method described in paragraph 1, the terminal device obtains a predetermined power from a pole transformer and is coupled to the distribution line via a high voltage coupler, and transmits the accident data to the distribution line. A fault section detection method for power distribution lines configured to transmit and receive data depending on the transport method. In the accident section detection method described in any one of paragraphs 1 to 3 of JIg, the method for detecting distribution lines using non-volatile memory as a means of storing accident data in the terminal equipment. Accident section detection method. ■ In the accident section detection method described in claim 1, the central monitoring and control device is configured to call and respond only to terminals that store accident data based on 1% of the time. Railway accident section detection method. In the accident section detection method described in claim 1, the central monitoring and control device transmits the accident data memory deletion command to the terminal device after transferring the accident data from the terminal device, and deletes the memory data of the terminal device. - A fault section detection method for a power distribution line that is configured to eliminate.