KR930010687B1 - Monitoring system for distribution line - Google Patents

Abstract

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Description

Distribution monitoring system

1 is an explanatory diagram showing a distribution line of the present invention and a monitoring system thereof.

2 is a block circuit diagram showing the configuration of the United States.

3 is a block circuit diagram showing a configuration of a host.

4 is an electrical circuit diagram showing a communication device installed in a domestic station.

* Explanation of symbols for main parts of the drawings

1: United States 2: Distribution Line

3: optical signal line (right turn) 4: optical signal line (left turn)

5: communication device

LED1, 2: light emitting diodes as optical signal generating means

PD1, 2: photodiode as signal converting means

13: reception level judge as detection means

18: relay circuit for switching input circuit as switching inversion means

19: relay circuit for output switching

The present invention monitors the mark of the distribution lines to control by using a light signal in the United States (하면), and if an accident occurs on the distribution line by sending a control command signal from the United States to manipulate the marks and accident section The present invention relates to a distribution line monitoring system for disconnection of power supply and retransmission to a health section.

In the prior art, a loop phase distribution line for supplying electric power sent from a substation to a customer is divided by a plurality of switches. Marks corresponding to each switch are provided so that the United States is connected in series by loops of optical signal lines, avoiding electrical signals that have stable communication with these marks. Thus, the United States sequentially communicated with its own country to grasp the track status of each section, and in response to the accident of the distribution system, the accident section was cut off to the health section by switching the switching section of the corresponding section from time to time. However, when the optical signal line is damaged or blocked by external force, or the signal input is stopped due to a poor connection or a failure due to a level deterioration, there is a problem in that the US of all connected countries cannot monitor and control.

SUMMARY OF THE INVENTION An object of the present invention is to provide a distribution line monitoring system capable of communicating with all other stations except for the ones in which a failure occurs in the conventional distribution system.

The present invention distinguishes and controls power distribution in order to correct the above-mentioned problems, and also comprises a pair of optical signal lines forming a plurality of marks provided with a communication device and loops for transmitting the marks always in opposite directions through the communication device. And optical signal generating means connected to both optical signal lines in the US and each communication device connected in series with the local station by the optical signal line and outputting an optical signal to a communication device of an adjacent local station based on an electrical signal. In the apparatus, the optical signal generating means connected to both optical signal lines respectively corresponding to the optical signal generating means, converts the optical signal from the optical signal generating means of the local station in the communication device of the adjacent local station, and outputs the optical signal to the corresponding optical signal generating means in the same communication device. Transmission of the optical signal line by the signal conversion means and the signal level converted by the signal conversion means, respectively. A detection means for detecting a defect and outputting a detection signal and another optical signal generating means corresponding to the signal conversion means for the communication path of the electrical signal output from the signal conversion means according to the detection signal outputted by the detection means, respectively. The gist of the present invention consists of switching means for switching the optical signal generating means of the signal and inverting the transmission path of the optical signal.

The function of the present invention is that the optical signal generating means outputs an optical signal to a communication device of a neighboring station based on an electric signal in each communication device. The signal converting means converts the optical signal into an electrical signal in the adjacent signal by the optical signal generating means in the communication apparatus and outputs it to the corresponding optical signal generating means in the same communication apparatus. The detection means detects a transmission failure of the optical signal in accordance with the signal level converted by the two signal conversion means, respectively, and outputs the detection signal. The switching inverting means switches the passage of the electric signal output from the signal converting means according to the detection signal output from the signal converting means, from the optical signal generating means corresponding to the signal converting means to the optical signal generating means of another optical signal line. Reverse the transmission path of the signal.

EXAMPLE

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of a monitoring system for a distribution line of the present invention will be described in detail with reference to the accompanying drawings.

1 is an exemplary diagram of a distribution system on a loop where the United States 1 is monitored.

The power distribution line 2 is fed from the substation H. The switchgear 2 is provided with the line switch SS1-(SSn) and these marks K1-(Kn). The switchgear (SS1)-(SSn) and the distribution line (2) is opened and closed separately, and the tracks (K1)-(Kn) to drive the switch (SSn1)-(SSn) respectively to collect the line information. Each station K1-Kn is connected in series with the fishing vessel 1 via a communication device by a pair of optical signal lines 3 and 4.

In FIG. 1, one optical signal line 3 constitutes a communication line which is easier to transmit in the left side of the U.S. 1, and the other optical signal line 4 constitutes a communication line which transmits in the right turn in the U.S. In either case, the wires are wired in the shape of a loop returning to the US 1.

As shown in FIG. 2, the U.S. 1 includes a communication unit 5, a central processing unit (CPU) 6 read and write memory (RAM) 7 and a read-only memory (ROM) 8 It consists of. In the ROM 8, programs for control and calculation are stored in advance. The CPU 6 arithmically processes various input signals by a program, and temporarily stores the accumulated data or the updated data thereof as a result of the calculation in the RAM 7. The CPU 6 is configured to communicate with the local station K1-Kn through each communication device 5 and identify each local station signal using a data frame that divides these data by function.

As shown in FIG. 3, the tracks K1-Kn comprise a drive device 9, a sensing device 10, a control device 11, and a communication device 12. As shown in FIG. The drive device 9 opens and closes the line breakers SS1-SSn. The detection device 10 is provided with an optical sensor for detecting a phase current, a phase voltage, or an image component of the distribution line 2. The control device 11 calculates and processes a command signal or a sensor signal relating to the drive device 9 and the detection device 10. The communication device 12 communicates with the U.S. 1 by the optical signal lines 3 and 4 so as to transmit a command signal of the U.S. 1 and a response signal to the U.S. 1 between the controller 11 and the U.S. Relay.

The communication device 12 of the station K1-Kn is shown in FIG. 4 shows only the marks K9- (K11) among the marks K1- (Kn), and the others are omitted. Each communication device 12 is provided with a photodiode PD1 (PC2) for converting an optical signal into an electrical signal and a light emitting diode (LED1) (LED2) for converting an electrical signal into an optical signal. The dual photodiode PD1 and the light emitting diode LED1 are connected to the left turn signal line 3, and the photodiode PD2 and the light emitting diode LED2 are connected to the right turn signal line 4.

The input circuit in the photodiode PD1 closes the reception level determiner 13 and the input contact 14, which serve as comparators for electrically measuring the input from the optical signal line 3. It is connected to the control apparatus 11 via the contact 14b. In this way, the output circuit to the light emitting diode LED1 is connected to the control device 11 through the normally closed contact 15b of the output contact 15.

The input circuit in the photodiode PD2 is connected to the light-emitting diode LED2 through a reception level determiner 16 and an upper / close contact 17 which are comparators or the like for electrically measuring the input from the optical signal line 4. Is connected to. In this way, the output terminal of the top-closed contact 15a placed on the output contact 15 is connected between the light emitting diode LED2 and the top-closed contact 17. The output terminal of the upper contact 14a placed on the input contact 14 is connected between the reception level determiner 16 and the upper closed contact 17.

The output of the reception level determiner 13 is connected to an input circuit converter 18 which is a relay circuit. If the reception level determiner 13 cannot detect a signal input from the optical signal line 3 or the intensity of the input signal does not reach a predetermined level, the reception level determiner 13 receives a reception level. Output the deterioration signal. In response to this signal, the input circuit converter 18 operates to selectively open and close the top contact 14a and the top closed contact 14b of the input contact 14 and to switch the top closed contact 17.

In this way, the output of the reception level determiner 16 is connected to an output circuit converter 19 which is a relay circuit. When the reception level determiner 16 cannot detect a signal input from the optical signal line 4 or the intensity of the input signal does not reach a predetermined level, the reception level decreases to the output circuit converter 19. Output the signal. In response to this signal, the output circuit converter 19 operates to selectively open and close the top contact 15a and the top closed contact 15b of the input contact 15, and to open the top closed contact 17. It is configured to be switchable.

In addition, the input circuit converter 18 and the output circuit converter 19 are connected to the control device 11, respectively, and an operation signal of each converter 18, 19 is input to the control device 11.

Referring to the operation of the power distribution monitoring system of the present invention configured as described above are as follows. First, the case where the optical signal lines 3 and 4 operate normally will be described.

In the marks K9 to K11 shown in FIG. 4, the optical signal from the optical signal line 3 on the left turn is input to the photodiode PD1 to be converted into an electrical signal, and the normal closing contact 14b of the input contact 14 is shown. Is inputted to the control device 11 through. At this time, the reception level determiner 13 does not output an operation signal to the input circuit converter 18.

The control device 11 outputs a command signal to the drive device 9 of the line breakers SS9 to SS11 or calculates input data from the detection device 10 in accordance with the control signal from the fishing unit 1. The process outputs a response signal to the fishing unit 1. These signals pass through the upper and lower contact points 15b of the output contact point 15 and are input to the light emitting diode LED1, are converted into optical signals, and proceed leftwardly by the optical signal line 3.

On the other hand, the optical signal from the optical signal line 4 of the right turn is input to the photodiode PD2, converted into an electrical signal, passed through the upper and lower contact points 17, and input to the light emitting diode LED2, and is converted into an optical signal to convert the optical signal line ( 4) Go right by right.

In this embodiment, the signal by the right turn optical signal line 4 passes through the communication device 12 and is not input to the control device 11.

Next, a case where the two optical signal lines 3 and 4 have a failure in the same position between the mark K9 and the mark K10 will be described.

In the marks K1-K9, the signal input from the optical signal line 4 of the right turn to the photodiode PD2 is stopped or the level decreases. For this reason, the reception level drop signal is input. Then, the output circuit converter 19 operates to open the simultaneous close / close contact 17 in which the close / close contact 15a is closed instead of the close / close contact 15b, and the signal input to the light emitting diode LED2 is stopped.

On the other hand, in the marks K1-K9, the signal from the optical signal line 3 in the left turn is input to the control device 11 through the photodiode 11 and the top-close contact 11b as in the normal state. As a result, the signal from the control device 11 passes through the open top contact 15a of the output contact 15 to the light emitting diode LED2, and the output signals of the marks K1-K9 are output. The optical signal line 4 is inverted to the right and proceeds.

In addition, in the station K10-Kn, the input signal from the photodiode PD1 is stopped or leveled down in the optical signal line 3 of the right turn, so that the reception level determiner 13 is operated so that the reception level reduction signal is opened. Input to transducer 18. Then, the converter 18 operates with the input opening, so that the upper and lower contact 17 is opened instead of the upper and closing contact 14b, and the signal input to the light emitting diode LED2 is stopped.

On the other hand, the signal from the optical signal line 4 of the right turn is input to the control device 11 through the upper contact 14a opened at the photodiode PD2 as in the normal state. Therefore, the signal from the control device 11 is input to the light emitting diode LED1 via the normally closed contact point 15b, and the output signal of the station K10-Kn is transmitted by the optical signal line 3 on which the input is stopped. It is reversed by turning right.

As can be seen from above, in the event of a failure, the communication device 12 of each of the stations K1-K9 stops the input to the photodiode PD2 from the optical signal line 4 of the right turn, respectively. Thus, the optical signal is sent through the optical signal line 3 to the left in the mark. At this time, the output signal passes through the optical signal line 4 by switching and is inverted to the right turn and sent out.

In addition, in the communication device 12 of each station K10-Kn, the signal input to the photodiode PD1 is stopped from the optical signal line 3 of the left turn, respectively, and the signal is sent to the right by the optical signal line 4 and output. The circuit is switched so that the signal is inverted to the left by the optical signal line 3 and sent out.

As a result, in the United States (1), communication with other countries except for the adjacent country (K1) (Kn) is temporarily suspended in the United States (1), but sequentially in (K1) and (Kn) where communication continues. The communication with all the stations is restored by operating the input contact 14 or the output contact 15 by the control command and returning the contact point in the communication device 12 of each station K1-Kn.

In this case, the signals are inputted from the right turn optical signal line 3 at the marks K1-K9, inverted at the mark K9, and the signals are transmitted by the right turn optical signal line 4.

In addition, a signal is inputted from the optical signal line 4 of the right turn to Kn in the local station K10, inverted by the local signal K10, and proceeds by the optical signal line 3 of the right turn.

Next, the operation in the case where only one of the optical signal lines 3 and 4 is broken between the marks K9 and K10 will be described.

First, when only the optical signal line 3 has failed, the reception level determiner 13 of the local station K10 and the input circuit converter operate to open the simultaneous signal-closing contact 17 to which the connection of the input contact 14 is switched. Input to (4) stops. On the other hand, at the local station K9, the reception level determiner 16 and the output circuit converter 19 are operated to simultaneously open and close the simultaneous contact 17 which switches the connection of the output contact 15, and inputs it to the optical signal line 4. Is stopped. In this case as well, this case is similar to the case where the two optical signal lines 3 and 4 fail.

In addition, when only the optical signal line 4 has failed, the self-closing contact 17 at which the slave station operates the reception level determiner 16 and the output circuit converter 19 to switch the connection of the output contact 15. With this opening, the output to the optical signal line 3 stops, and at the slave station K10, the reception level determiner 13 and the input circuit converter 18 operate to switch the connection of the input contact 14, and at the same time, the normal closing contact 17 ), The input to the optical signal line 3 is stopped. In this case as well, both optical signal lines 3 and 4 are broken.

The failure section of both optical signal lines 3 and 4 can be detected by returning the contact point of the communication device 12 by controlling each station in sequence in the US 1 as described above.

As described above, the distribution line monitoring system of the present invention is provided with means for determining the input level of two optical signal lines transmitted in opposite directions and switching the input circuit and the output circuit so that the optical signal lines are disconnected in the transmission path. Alternatively, even if a failure occurs due to poor contact, signals can be reversed and communicated on both sides of the failure section.

Claims (4)

A pair of optical signal lines forming a loop shape for controlling the distribution line and transmitting a plurality of local stations and communication stations in opposite directions through the communication apparatus, and a word connected in series with the local station by the optical signal lines. Optical signal generating means connected to each of the United States and respective optical signal lines in each communication device and outputting an optical signal to an adjacent local communication device based on an electrical signal, and corresponding to the optical signal generating means in the same communication device; Signal conversion means connected to each of the two optical signal lines, for converting the optical signal from the optical signal generating means in the communication apparatus of the adjacent station into an electrical signal and outputting to the corresponding optical signal generating means in the same communication apparatus; Detection means for detecting a transmission failure of the optical signal line and outputting a detection signal by the level of each converted signal, Inverting the transmission path of the optical signal by switching the communication path of the electrical signal output from the signal conversion means from the optical signal generation means corresponding to the signal conversion means to the optical signal generation means of another optical signal line according to the detected detection signal; Distribution system monitoring system, characterized in that the switch switching means. 2. A simultaneous apparatus as claimed in claim 1, further comprising: a sensor means connected to the track and a distribution line, and a driving means connected to a switch that separates the distribution line, and a control means for driving the driving means in accordance with a detection result of the sensor means. And a distribution line monitoring system connected to the communication device. The system of claim 1, wherein the detecting means operates when the signal level is lower than a signal level converted by the signal converting means from a predetermined minimum level. 4. A switching circuit for switching between an input switching relay circuit and an output circuit for switching between one of an input contact point and an output contact point respectively provided on the secondary shafts of both comparators, while the switching inverting means opens the upper and lower contact points of the comparator's secondary shafts. Monitoring system for distribution lines made of relay circuits.

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