TW201532359A - Automatic detection system and method for distributed branch failure - Google Patents

Abstract

An automatic detection system for distributed branch failure comprises K power termination/resumption control modules having L branch circuits and M cascaded first control circuits, each first control circuit comprising a first four-way switch unit and a first detection unit which are cascaded, the first four-way switch unit comprising: a first breaker for transmitting a first drive power to a corresponding branch circuit electrically connected therewith; and a protective relay electrically connected with a corresponding first breaker to detect whether the current value of the first driving power is greater than a first threshold current value to generate a first control signal, the first detection unit being used to detect whether the protective relay generates the first control signal to determine whether the branch circuit corresponding to the first breaker is failed or not.

Description

Decentralized branch line fault automatic detection system and method

The invention relates to a detection system and method, in particular to a decentralized bifurcation fault automatic detection system and method.

The conventional branch line automatic detection system comprises a feeder automation main device, a plurality of four-way switch units and a plurality of branch line circuits. Each of the four-way switch units is electrically connected between the feeder automation main device and the plurality of branch line circuits, and each of the branch line circuits is electrically connected to the plurality of loads. The feeder automation master can supply power to the electrically connected load via each of the four switch units and their corresponding branch line circuits. The feeder automation main device continuously detects the operation in each four-way switch unit, and when there is a fault in the branch line circuit, the feeder automation main device can know the four-way switch unit corresponding to the faulty branch line circuit, and The Fault Detection Isolation and Restoration (FDIR) function is performed on the bifurcation circuit electrically connected to the four-way switch unit.

Therefore, the conventional method of controlling the fault detection, isolation and re-powering of each bifurcation circuit has the following disadvantages:

1. The bifurcation line auto-detection system cannot quickly know if a fault has occurred and FDIR is performed on the faulty branch line circuit. Since each four-way switch unit is electrically connected to the feeder automation main device, causing disagreement When the line circuit fails, the feeder automation main device needs to detect the operation of each four-way switch unit to know the four-way switch unit corresponding to the faulty branch line circuit, and electrically connect the four-way switch unit. The branch line circuit of the switch unit performs FDIR manually, so that the branch line automatic detection system needs to complete the FDIR time extension.

2. The program software design is complicated. Since each of the four-way switch unit and the branch line circuit is detected and controlled by the feeder automation main device, the design of the program software of the feeder automation main device is complicated.

Accordingly, a first object of the present invention is to provide a decentralized bifurcation automatic detection system that can quickly know that a failure has occurred.

Therefore, the distributed divergent line automatic detection system of the present invention comprises K stop-and-over-power control modules, K is a positive integer, K≧1, and each stop-and-over-voltage control module includes L branch line circuits and M series connections. The first control circuit connected, L, M are positive integers, L, M≧1.

Each of the first control circuits includes a first four-way switch unit and a first detection unit.

The first four-way switch unit electrically connects the two corresponding branch line circuits, and the first four-way switch unit includes a first circuit breaker and a protection circuit.

The first circuit breaker electrically connects the corresponding branch line circuit to transmit a first driving power to the corresponding branch line circuit, and is controlled to switch between conduction and non-conduction.

The protection circuit is electrically connected to the first circuit breaker, Detecting whether the current value of the first driving power from the first circuit breaker is greater than a first critical current value, and when the detection result is YES, the protection power generating a first control signal and outputting to the same Corresponding to the first circuit breaker, so that the corresponding first circuit breaker is not turned on.

The first detecting unit is electrically connected to the first four-way switch unit for detecting whether the protection switch generates the first control signal to determine whether the branch line circuit corresponding to the first circuit breaker is faulty. .

A second object of the present invention is to provide a method for automatically detecting a distributed bifurcation line that can quickly know that a failure has occurred.

The decentralized bifurcation line automatic detection method is applicable to a decentralized bifurcation line fault automatic detection system, and the decentralized bifurcation line fault automatic detection system comprises a plurality of first detecting units, a first four-way switching unit and a branch line a circuit, each of the first four-way switch unit is electrically connected between the corresponding first detection unit and two bifurcated line circuits in the bifurcation circuit, each first four-way switch unit includes a first a circuit breaker and a protection circuit electrically connected to the first circuit breaker, the first circuit breaker electrically connecting one of the branch line circuits corresponding to the first circuit breaker, and the method for automatically detecting the distributed branch line comprises the following steps (A) detecting, by each protection power, whether a current value of a first driving power transmitted from the corresponding first circuit breaker is greater than a first critical current value; (B) when step (A) When the detection result is YES, a corresponding first control signal is generated by using the corresponding detection result that is YES, and is output to the corresponding first circuit breaker, so that the corresponding first The circuit breaker is non-conducting; and (C) detecting, by each of the first detecting units, whether the corresponding protection power is generated by the first detecting unit to determine the corresponding branch line of each of the first circuit breakers Is the circuit faulty?

1‧‧‧Stop power control module

11‧‧‧First control circuit

111‧‧‧First four-way switch unit

112‧‧‧First detection unit

113‧‧‧ switch

114‧‧‧Switch

115‧‧‧First circuit breaker

116‧‧‧second circuit breaker

117‧‧‧Electrical protection

R‧‧‧Common joint

C1‧‧‧ first control signal

C2‧‧‧second control signal

12‧‧‧Second control circuit

121‧‧‧Second four-way switch unit

122‧‧‧Second detection unit

123‧‧‧Switch

124‧‧‧ switch

125‧‧‧First circuit breaker

126‧‧‧second circuit breaker

127‧‧‧Electrical protection

Q‧‧‧Common joints

C3‧‧‧ third control signal

C4‧‧‧ fourth control signal

13‧‧‧Difference line circuit

131‧‧‧First substation

132‧‧‧Second sub-station

133‧‧‧load

134‧‧‧Toggle switch

P1‧‧‧First conduction path

P2‧‧‧second conduction path

P3‧‧‧ third conduction path

2‧‧‧Measurement module

3‧‧‧ feeder automation main unit

4‧‧‧First feeder end module

5‧‧‧Second feeder end module

60~69‧‧‧Difference line automatic detection steps

F1, f2‧‧‧ fault point

Other features and effects of the present invention will be apparent from the following description of the drawings. FIG. 1 is a circuit diagram illustrating a first preferred embodiment of the distributed bifurcation line automatic detection system of the present invention; 2a and 2b are flowcharts illustrating a stop-and-restore control module of the first preferred embodiment for performing a method for automatically detecting distributed bifurcation lines; and FIGS. 3a to 3d are circuit diagrams illustrating the first comparison FIG. 4 is a circuit diagram illustrating a first variation of the first preferred embodiment; FIG. 5 is a first embodiment of a preferred embodiment of the present invention; FIG. The circuit diagram illustrates a second variation of the first preferred embodiment; and FIG. 6 is a circuit diagram illustrating a second preferred embodiment of the distributed divergent line automatic detection system of the present invention.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same reference numerals.

<First Preferred Embodiment>

Referring to FIG. 1 , a first preferred embodiment of the distributed divergence line automatic detection system of the present invention comprises K stop and power control modules 1 , a measurement module 2 , a feeder automation main device 3 , and a first And the second feeder end module 4, 5, K is a positive integer, and K ≧ 1. In this embodiment, for convenience of explanation, K=1 is taken as an example, but is not limited thereto.

Each of the power-down control modules 1 includes M first control circuits 11 connected in series and each having a first and second output terminals, N second control circuits connected in series and each having a first and second output terminals 12, and L branch line circuits 13 each having a first and second end and a first and second conduction paths P1, P2, wherein M, N, L are positive integers, M, N, L ≧ 1. In this embodiment, M < N, L = 2M, M = 1, N = 2, L = 2, but is not limited thereto.

Each of the first control circuits 11 transmits a first and second driving power to the respective first and second output terminals according to the driving power associated with the first total driving power. In this embodiment, each of the first control circuits 11 includes a first four-way switch unit 111 and a first detection unit 112.

In each of the first control circuits 11, the first four-way switch unit 111 includes two switches 113, 114 connected in series, a first and second circuit breakers 115, 116, and a protection switch 117. Each switch 113, 114 is controlled to switch between conducting and non-conducting. The first and second circuit breakers 115, 116 respectively have a first end electrically connected to a common contact R of the switches 113, 114, and a second end, the first and second circuit breakers 115, 116 The second end of the first control circuit 11 is corresponding to the first The second output end transmits the first and second driving powers respectively, and is respectively controlled to switch between conduction and non-conduction. The protection device 117 is electrically connected between the second ends of the first and second circuit breakers 115, 116 to detect the first and second driving powers from the first and second circuit breakers 115, 116. Whether the current value is greater than a first and second critical current value (ie, a short circuit fault), when the detection result is YES, the protection power 117 generates a first and second control signals C1, C2, and respectively The first and second circuit breakers 115 and 116 are outputted to the corresponding first and second circuit breakers 115 and 116 so that the corresponding first and second circuit breakers 115 and 116 are not turned on.

The first detecting unit 112 is electrically connected to the first four-way switch unit 111 for detecting whether the protection switch 117 generates one of the first and second control signals C1 and C2 to determine whether there is any malfunction.

When M<N, the first output end of the first second control circuit 12 and the second output end of the Nth second control circuit 12 are respectively electrically connected to one of the corresponding bifurcation line units (not shown), and Each of the first to Nth second control circuits 12 respectively generates a first and a second output ends of the branch line unit that are not electrically connected according to the driving power associated with a second total driving power The third and fourth driving power. In this embodiment, each of the second control circuits 12 includes a second four-way switch unit 121 and a second detection unit 122, and the second four-way of the first and second second control circuits 12 The switch unit 121 is connected in series, but is not limited thereto.

In each of the second control circuits 12, the second four-way switch unit 121 includes two switches 123, 124 connected in series, a first and second circuit breakers 125, 126, and a protection switch 127. Each switch 123, 124 Controlled between switching between conduction and non-conduction. The first and second circuit breakers 125 and 126 respectively have a first end, and a second end electrically connected to a common contact Q of the switches 123 and 124. The first and second circuit breakers 125 and 126 The first ends are respectively corresponding to the first and second output ends of the second control circuit 12 to respectively transmit the third and fourth driving powers, and are respectively controlled to switch between conduction and non-conduction. The protection switch 127 is electrically connected between the first ends of the first and second circuit breakers 125, 126 to detect the third and fourth driving powers from the first and second circuit breakers 125, 126 Whether the current value is greater than a third and fourth critical current value respectively, when the detection result is YES, the protection power 127 generates a third and fourth control signals C3, C4, and respectively output to the corresponding The first and second circuit breakers 125, 126 are such that the corresponding first and second circuit breakers 125, 126 are not conducting.

The second detecting unit 122 is electrically connected to the second four-way switch unit 121 for detecting whether the protection switch 127 generates one of the third and fourth control signals C3 and C4 to determine whether there is any malfunction.

In the L branch line circuits 13, when M < N, the first and second ends of the 2i-1 branch line circuit 13 are electrically connected to the first output end of the ith first control circuit 11 and the ith The second output end of the second control circuit 12 receives the first and fourth driving powers respectively, and the first and second ends of the 2i diverging line circuit 13 are electrically connected to the ith first control circuit 11 respectively. a second output end and a first output end of the i+1th second control circuit 12 to respectively receive the second and third driving powers, 1≦i≦M, and each bifurcation circuit 13 includes a plurality of conduction lines First sub-station 131, a non-conducting Binary station 132, and Y loads 133. In this embodiment, for convenience of explanation, the number of the first substations 131 is 5, Y is a positive integer, Y≧1, Y=7, but is not limited thereto.

In each of the branch line circuits 13, each of the substations 131, 132 continuously generates a fault detection signal, and includes a switch 134 controlled by switching between conduction and non-conduction, in each of the branch line circuits 13. The first conductive path P1 is formed between the first end and the second sub-station 132 of the corresponding one, and the second conductive path is formed between the second end of each of the bifurcation circuit 13 and the second sub-station 132 of the corresponding one. P2. In this embodiment, the fourth substation of the first branch line circuit 13 is taken as an example of the second substation 132 (ie, a normally open point), but is not limited thereto.

In each of the branch line circuits 13, the first and the Yth loads in each of the branch line circuits 13 are electrically connected to the first and second ends of the corresponding respectively, and the second to the Y-1th loads are sequentially followed. The electrical connections are respectively between the adjacent two substations. Each of the branch line circuits 13 supplies one of the first and second driving powers received by the first end to the corresponding load 133 by its first conduction path P1, and each of the branch line circuits 13 One of the third and fourth driving powers received by the second end thereof is supplied to the corresponding load 133 by its second conduction path P2.

The measurement module 2 is electrically connected to each of the power failure control modules 1 for measuring the power failure control module 1 to generate a measurement result, and outputting the measurement result to the feeder automation main Device 3.

The feeder automation main device 3 is configured to generate the first and second total driving powers, and electrically connect the measuring module 2 to receive the measurement result. And controlling the first and second detecting units 112, 122 according to the measurement result.

The first and second feeder end modules 4, 5 are electrically connected to the feeder automation main device 3, respectively, to receive and transmit the first and second total driving powers, respectively.

In FIG. 1, the parameter f1 indicates a fault point of the first conduction path P1 of the first branch line circuit 13.

Referring to FIG. 2a, FIG. 2b and FIG. 3a to FIG. 3d, each of the first and second control circuits 11 and 12 in the distributed bifurcation automatic detection system can respectively respectively perform the first and second conduction paths P1. P2 performs a decentralized split line automatic detection method. In this embodiment, for convenience of description, a switch is used as the protection switch 115 in FIGS. 3a to 3d, and the first first control circuit 11 executes the first conductive path P1 corresponding thereto. The method for automatically detecting the distributed bifurcation line is as an example, but is not limited thereto. The first first control circuit 11 can learn whether the first bifurcation circuit 13 is faulty according to the distributed bifurcation line automatic detection method, so as to detect and isolate the first bifurcation circuit 13 And Fault Detection Isolation and Restoration (FDIR), the method for automatically detecting the distributed bifurcation line includes the following steps:

Step 60: The protection switch 117 is used to detect whether the current value of the first driving power transmitted from the corresponding first circuit breaker 115 is greater than the first critical current value. If yes, step 61 is performed. Then, step 60 is re-executed.

Step 61: Generate the first control by using the protection switch 117 The signal C1 is output to the corresponding first circuit breaker 115 to make the first circuit breaker 115 non-conductive (see Fig. 3a).

Step 62: The first detecting unit 112 detects whether the protection switch 117 generates the first control signal C1 to determine whether the branch line circuit 13 corresponding to the first circuit breaker 115 is faulty, and if so, Go to step 63. If no, go back to step 62.

Step 63: The first detecting unit 112 determines the branch line circuit according to the fault detection signal generated by each of the substations 131 and 132 in the branch line circuit 13 before the first circuit breaker 115 is not turned on. The position of the fault point f1 in 13.

For example, the first and second first sub-station 131, and the second sub-station 132 to the fifth first sub-station 131 respectively generate the fault before the first circuit breaker 115 is not turned on. When the detection signals are the same, and the fault detection signals generated by the second and third first substations 131 are different, the first detecting unit 112 may generate the fault according to each of the substations 131, 132. The fault detection signal determines that the location of the fault point f1 is between the second and third first substations 131.

Step 64: If the fault point f1 is separated by at least one first substation 131 of the second substation 132, the first detecting unit 112 is used to make the two first substations of the adjacent fault point f1 The switch 134 in the 131 is not turned on (see Fig. 3b), and the power detector can immediately perform maintenance control on the fault point f1.

Step 65: Using the first detecting unit 112, the first circuit breaker 115 is turned on (see FIG. 3c).

Step 66: Using the first detecting unit 112, the switching switch 134 of the second substation 132 is turned on (see FIG. 3d).

Step 67: The measurement module 2 is used to measure whether the fault point f1 returns to normal. If yes, step 68 is performed, and if not, step 67 is re-executed.

For example, the measurement module 2 measures whether a third conduction path P3 between the two first substations 131 adjacent to the fault point f1 is conductive, to confirm whether the fault point f1 returns to normal.

Step 68: The measurement result is generated by the measurement module 2 and output to the feeder automation main device 3.

Step 69: The first automatic detection unit 112 is controlled by the feeder automation device 3 according to the measurement result, so that the switch 134 of the two first substations 131 adjacent to the fault point f1 is turned on, and the The switch 134 of the second substation 132 is not conducting.

At this time, the first branch line circuit 13 is restored to the original conduction state (see FIG. 1).

Therefore, the first detection unit 112 detects each of the first four-way switch units 111 corresponding to each of the first four-way switch units 111 by using the distributed split-line automatic detection system and the distributed split-line automatic detection method. It is possible to quickly know whether or not a failure has occurred and perform FDIR on the branch line circuit 13 in which the failure has occurred.

Referring to FIG. 4, a first variation of the first preferred embodiment is similar to the first preferred embodiment. The difference is that in the first variant, M>N, L =2N, where M, N, and L are respectively The number of first and second control circuits 11, 12 and the branch line circuit 13 is equal. In this embodiment, M = 2, N = 1, L = 2, but is not limited thereto.

When M>N, the first output terminal of the first first control circuit 11 and the second output end of the Mth first control circuit 11 are respectively electrically connected to one of the M first control circuits 11. a branch line unit (not shown), and each of the first to Mth first control circuits 11 is electrically connected to the branch line unit according to the driving power associated with the first total driving power The first and second output terminals respectively generate the first and second driving powers. Each of the N second control circuits 12 generates the third and fourth drivers respectively at the first and second output ends according to the driving power associated with the second total driving power. electric power. In the L branch line circuits 13, the first and second ends of the 2i-1th branch line circuit 13 are electrically connected to the second output end of the ith first control circuit 11 and the ith second control circuit 12, respectively. The first output end receives the second and third driving power respectively, and the first and second ends of the 2i diverging line circuit 13 are electrically connected to the first output end of the i+1th first control circuit 11, respectively And a second output end of the i-th second control circuit 12 to receive the first and fourth driving powers, respectively, 1≦i≦N.

In this embodiment, the first variant of the distributed bifurcation line automatic detection method is similar to the first preferred embodiment, and details are not described herein.

Referring to FIG. 5, a second variation of the first preferred embodiment is similar to the first preferred embodiment. The difference is that in the second variant, M=N, L. =2M-1. In this embodiment, M=N>1, M=2, N=2, and L=3, but are not limited thereto.

When M=N>1, each of the first to M-1th first control circuits 11 of the M first control circuits 11 is based on the driving power related to the first total driving power. The first and second output ends of the corresponding ones respectively generate the first and second driving powers, and the Mth first control circuit 11 is at the first output end thereof according to the driving power related to the first total driving power The first driving power is generated, and the second output thereof is electrically connected to a branch line unit (not shown). The first output end of the first second control circuit 12 is electrically connected to a branch line unit (not shown), and according to the driving power related to the second total driving power, Generating the fourth driving power at the second output thereof, and each of the second through Nth second control circuits 12 is in the first of the corresponding ones according to the driving power associated with the second total driving power And the second output terminal generates the third and fourth driving powers respectively. In the L branch line circuits 13, the first and second ends of the 2i-1th branch line circuit 13 are electrically connected to the first output end of the ith first control circuit 11 and the ith second control circuit 12, respectively. The second output end receives the first and fourth driving powers respectively, and the first and second ends of the 2i diverging line circuit 13 are electrically connected to the second output end of the i-th first control circuit 11 and The first output terminals of the i+1 second control circuits 12 respectively receive the second and third driving powers, 1≦i≦N.

In addition, when M=N=1, L=1, the first control circuit 11 generates the first driving power at the first output end thereof according to the driving power related to the first total driving power, and the second thereof The output terminal is electrically connected to a branch line unit (not shown). The first output end of the second control circuit 12 is electrically connected to a branch line unit (not shown), and according to the second total driving power The driving power is generated at the second output of the fourth driving power. The first and second ends of the branch line circuit 13 are electrically connected to the first output end of the first control circuit 11 and the second output end of the second control circuit 12 respectively to receive the first and fourth driving powers respectively. .

In this embodiment, the second variant of the distributed bifurcation line automatic detection method is similar to the first preferred embodiment, and details are not described herein.

<Second preferred embodiment>

Referring to FIG. 6, a second preferred embodiment of the distributed bifurcation automatic detection system of the present invention is similar to the first preferred embodiment, except that the embodiment is located in the first bifurcation circuit. The fault point f2 of the second conduction path P2 of 13 replaces the fault point f1 in the first preferred embodiment.

The first second control circuit 12 can perform FDIR on the first branch line circuit 13, and the method for automatically detecting the distributed bifurcation line executed by the first second control circuit 12 is similar to the first preferred embodiment. I will not go into details here.

In summary, the above embodiment has the following advantages:

1. The distributed bifurcation line automatic detection system can quickly know whether a fault has occurred and perform FDIR on the faulty branch line circuit 13. Since each of the first and second four-way switching units 111, 121 and the branch line circuit 13 are controlled by the corresponding first or second detecting units 112, 122, when the branch line circuit 13 fails Each of the first or second detecting units 112 and 122 can detect whether a fault occurs by detecting the corresponding first or second four-way switch units 111 and 121, and electrically connect the four paths. open The branch line circuit 13 of the off unit performs FDIR, so that the time required for the distributed branch line automatic detection system to complete the FDIR is reduced.

2. The program software is simple in design. Since each of the first and second four-way switch units 111, 121 and the branch line circuit 13 are controlled by the first or second control circuit 12 of the corresponding one, not all of the four-way switch unit and the branch line circuit are conventionally known. 13 is controlled by the feeder automation main device 3, which results in a simple design of the program software of the feeder automation main device 3.

The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, that is, the simple equivalent changes and modifications made by the patent application scope and patent specification content of the present invention, All remain within the scope of the invention patent.

1‧‧‧Stop power control module

11‧‧‧First control circuit

111‧‧‧First four-way switch unit

112‧‧‧First detection unit

113‧‧‧ switch

114‧‧‧Switch

115‧‧‧First circuit breaker

116‧‧‧second circuit breaker

117‧‧‧Electrical protection

R‧‧‧Common joint

C1‧‧‧ first control signal

C2‧‧‧second control signal

12‧‧‧Second control circuit

121‧‧‧Second four-way switch unit

122‧‧‧Second detection unit

123‧‧‧Switch

124‧‧‧ switch

125‧‧‧First circuit breaker

126‧‧‧second circuit breaker

127‧‧‧Electrical protection

Q‧‧‧Common joints

C3‧‧‧ third control signal

C4‧‧‧ fourth control signal

13‧‧‧Difference line circuit

131‧‧‧First substation

132‧‧‧Second sub-station

133‧‧‧load

134‧‧‧Toggle switch

P1‧‧‧First conduction path

P2‧‧‧second conduction path

2‧‧‧Measurement module

3‧‧‧ feeder automation main unit

4‧‧‧First feeder end module

5‧‧‧Second feeder end module

F1‧‧‧ fault point

Claims (9)

A decentralized bifurcation fault automatic detection system comprises: K stop-and-over-voltage control modules, K is a positive integer, K≧1, and each stop-and-restart control module comprises: L bifurcation lines, L is A positive integer, L≧1, and M first control circuits connected in series, M is a positive integer, M≧1, and each first control circuit includes: a first four-way switch unit, electrically connecting two corresponding ones a dividing line circuit, and the first four-way switching unit comprises: a first circuit breaker electrically connected to the branch line circuit to transmit a first driving power to the corresponding branch line circuit, and is controlled by Switching between conduction and non-conduction, and a protection circuit, electrically connecting the first circuit breaker to detect whether the current value of the first driving power from the first circuit breaker is greater than a first critical current value When the detection result is YES, the protection power generating a first control signal is output to the corresponding first circuit breaker, so that the corresponding first circuit breaker is non-conductive, and a first a detecting unit electrically connecting the first four-way switch unit Detecting whether the protection relay to generate the first control signal, to determine whether the differences between the first antenna circuit breaker corresponding faulty. The distributed bifurcation fault automatic detection system described in claim 1 Each of the bifurcation circuits includes a plurality of first sub-stations that are turned on and a second sub-station that is non-conducting; if the first detection unit detects that the protection power has generated the first control signal, the first a detecting unit determines a position of a fault point in the branch line circuit according to a fault detection signal generated by each of the branch line circuits corresponding to the first circuit breaker not being turned on, and if The fault point is separated from the at least one first substation of the second substation, so that the two first substations adjacent to the fault point are not turned on, the first circuit breaker is turned on, and the second substation is turned on. The distributed bifurcation fault automatic detection system according to claim 2, further comprising: a measurement module, electrically connecting each of the shutdown power control modules, to measure whether the fault point returns to normal, to generate a measurement result; and a feeder automation main device, electrically connecting the measurement module to receive the measurement result, and controlling the first detection unit to make the corresponding two adjacent fault points according to the measurement result The first substation is turned on and the corresponding second substation is not turned on. The decentralized bifurcation fault automatic detection system of claim 1, the first four-way switch unit further comprising: a second circuit breaker, the bifurcation circuit corresponding to the electrical connection, to transmit a second driving power To the corresponding branch line circuit, and controlled to switch between conduction and non-conduction. The distributed bifurcation fault automatic detection system described in claim 4, wherein: The protection circuit further electrically connects the corresponding second circuit breaker to detect whether the current value of the second driving power from the second circuit breaker is greater than a second critical current value, when the detection result is yes The protection device generates a second control signal and outputs it to the corresponding second circuit breaker so that the corresponding second circuit breaker does not conduct. The decentralized line fault automatic detection system of claim 1, wherein each of the power failure control modules further comprises N second control circuits connected in series, each second control circuit comprising: a second The four-way switch unit electrically connects the two corresponding branch line circuits, and the second four-way switch unit comprises: a first circuit breaker electrically connected to the branch line circuit to transmit a third driving power to Corresponding to the branch line circuit, and controlled to switch between conduction and non-conduction, and a protection circuit, electrically connecting the first circuit breaker to detect the third drive from the first circuit breaker Whether the current value of the power is greater than a third critical current value, and when the detection result is YES, the protection power generating a third control signal is output to the corresponding first circuit breaker, so that the corresponding The first circuit breaker is not turned on, and a second detecting unit is electrically connected to the second four-way switch unit for detecting whether the protection power generating the third control signal to determine the first open circuit The difference corresponding to the device Whether or circuit failure. A method for automatically detecting distributed bifurcation lines, which is suitable for a decentralized bifurcation fault automatic detection system, and the decentralized bifurcation fault automatic detection The measurement system includes a plurality of first detection units, a first four-way switch unit, and a bifurcation circuit, each of the first four-way switch units being electrically connected to the corresponding first detection unit and the bifurcation circuit Between the two branch line circuits, each of the first four-way switch unit includes a first circuit breaker and a protection switch electrically connected to the first circuit breaker, and the first circuit breaker electrical connection corresponds to the differences One of the line circuits, and the method for automatically detecting the distributed bifurcation line includes the following steps: (A) detecting, by each protection power, a first driving power transmitted from the corresponding first circuit breaker Whether the current value is greater than a first critical current value; (B) when the detection result of the step (A) is YES, generating a corresponding first control signal by using the corresponding protection signal that is YES, and Outputting to the corresponding first circuit breaker, so that the corresponding first circuit breaker is not conducting; and (C) detecting, by each first detecting unit, whether the corresponding protection power is generated by the first detecting unit a first control signal to determine each of the first circuit breakers If the branch line corresponding to the faulty circuit. The method for automatically detecting a distributed bifurcation line according to claim 7, wherein each bifurcation circuit includes a plurality of first sub-stations that are turned on and a second sub-station that is non-conducting, and each sub-station is controlled to be turned on and off. Switching between conductions, wherein the method for automatically detecting the distributed bifurcation line further comprises the following steps after the step (C): (D) when the detection result of the step (C) is YES, using the corresponding detection result Is the first detection unit, according to the corresponding a fault detection signal generated by each of the branch lines corresponding to the circuit breaker before the circuit breaker is not turned on, determining a position of a fault point in the corresponding branch line circuit; (E) if the fault Locating at least one first substation of the second substation, and using the first detection unit that is corresponding to the detection result, so that the two first substations of the adjacent fault point are not turned on; F) using the first detection unit corresponding to the detection result to make the corresponding first circuit breaker conductive; and (G) using the first detection unit corresponding to the detection result to be The corresponding second substation is turned on. The method for automatically detecting a distributed bifurcation line according to claim 8, wherein the decentralized bifurcation fault automatic detection system further comprises a measurement module electrically connected to each of the shutdown power control modules and an electrical connection quantity The feeder automatic control main device of the test module, wherein the distributed bifurcation line automatic detection method further comprises the following steps after the (G) step: (H) using the measurement module to measure whether the fault point returns to normal; (I) when the measurement result of the step (H) is YES, the measurement module is used to generate a measurement result and output to the feeder automation main device; and (J) using the feeder automation main device according to the quantity The measurement result controls the first detecting unit to turn on the two first substations adjacent to the fault point corresponding to the step (E), and the second substation corresponding to the step (G) is not turned on.