Dual-function power optical cable network line detection system and method

Abstract

The dual-function power optical cable network line detection system and method, which relates to the field of optical fiber communication in power systems, solves the existing optical cable line exclusive core detection mode based on optical time domain reflectometer (OTDR), which wastes the optical fiber core resources of the line and increases the detection cost; the optical power-based optical cable line working core online detection mode can only provide optical cable line receiving optical path fault alarm, and requires manual fault detection, and cannot identify the fault occurring at the line optical cable position, and the long time of troubleshooting causes the long interruption of optical fiber communication. The system includes a master device and N slave devices, and the master device is used to perform online detection of N optical cable lines between the main substation and N substations; N detection units share a control processor, an optical switch and an OTDR; the control processor is connected to the optical switch and the OTDR through an electrical interface. The new type improves the operational reliability of the detection system, ensures the stable operation of the power optical cable network, and meets the detection needs.

Description

Technical Field

[0001] The present invention relates to the field of optical fiber communication in electric power systems, and in particular to a dual-function electric power optical cable network line detection system and method. Background Art

[0002] The complex network topology, complex laying environment, and large geographical area of ​​the power optical cable network make the operation and maintenance of the optical fiber communication network of the power system difficult. Once the power optical cable network line fails, the communication will be interrupted, affecting the safe operation of the power system and causing economic losses to the power company. The existing online monitoring mode of optical cable lines based on optical power can only provide line fault alarms, but cannot provide detection information, and there are false alarms; optical cable line detection based on optical time domain reflectometer (OTDR) requires exclusive use of the fiber core for online detection of the line, which wastes the precious optical fiber core resources of the optical cable line and cannot meet the construction requirements of the power optical cable network of the energy Internet. Therefore, the existing technology is difficult to meet the detection needs of the optical cable network lines of the power system.

[0003] Therefore, the line detection of the optical cable network of the power system needs to carry out online detection of the optical cable lines of the optical cable network to avoid affecting the normal communication of the key lines of the power optical cable network, while improving the reliability of the online detection of the optical cable network, shortening the fault detection time of the optical cable line, and improving the intelligence level of the online detection of the optical cable line. Summary of the invention

[0004] The present invention aims to solve the problems that the existing optical cable line exclusive core detection mode based on optical time domain reflectometer (OTDR) wastes the optical fiber core resources of the line and increases the detection cost. The optical cable line working core online detection mode based on optical power can only provide the optical cable line receiving light path fault alarm, and manual fault detection is required. It is impossible to identify the position of the line optical cable where the fault occurs. The long time to troubleshoot the fault leads to a long interruption of optical fiber communication. A dual-function power optical cable network line detection system and method are provided.

[0005] A dual-function power optical cable network line detection system, which realizes the communication of the receiving optical path and the emitting optical path in the optical cable line, and realizes the simultaneous online detection of the emitting optical path and the receiving optical path in the optical cable line under optical communication conditions;

[0006] The detection system includes a master device and N slave devices, wherein the master device is installed in a main substation, and the N slave devices are installed in N substations respectively;

[0007] The master device is composed of a control processor, an optical switch, an OTDR and N detection units, and is used to perform online detection of N optical cable lines between the master substation and N substations. One detection unit and one slave device jointly complete the online detection of a corresponding optical cable line;

[0008] The N detection units share a control processor, an optical switch and an OTDR; the control processor is connected to the optical switch and the OTDR respectively through an electrical interface;

[0009] Each detection unit includes a first wavelength division multiplexer, a second wavelength division multiplexer and an attenuator;

[0010] Each slave device includes a third wavelength division multiplexer and a fourth wavelength division multiplexer;

[0011] The control processor is connected to the power system data transmission network through the RJ45 network port, and is connected to the server to realize remote control of the main device.

[0012] A dual-function power optical cable network line detection method is implemented by the following process:

[0013] The control processor controls the OTDR optical interface to connect to the optical switch, controls the optical path 0 to the optical path 1 of the optical switch to connect to the multiplexing port of the first wavelength division multiplexer in the corresponding detection unit, injects the detection light of 1625nm wavelength, connects the second optical fiber distribution frame at the master device end to the main road of the first optical cable line through the optical output port of the first wavelength division multiplexer, connects to the optical input port of the third wavelength division multiplexer of the corresponding slave device through the first optical fiber distribution frame at the slave device end, and then connects to the multiplexing port of the fourth wavelength division multiplexer through the demultiplexing port of the third wavelength division multiplexer, the optical output port of the fourth wavelength division multiplexer is connected to the main road of the first optical cable line through the first optical fiber distribution frame of the slave device, is connected to the optical input port of the second wavelength division multiplexer of the corresponding detection unit through the second optical fiber distribution frame at the master device end, and is connected to the attenuator through the demultiplexing port of the second wavelength division multiplexer, so as to realize the online detection of the light emitting optical path and the light receiving optical path in the corresponding optical cable line under the communication conditions;

[0014] The control processor controls the optical switch and is cyclically connected to the first wavelength division multiplexer in each detection unit of the main device in sequence, so as to detect the light emitting path and the light receiving path of each optical cable line in sequence, and upload the detection results to the server through the control processor.

[0015] Beneficial effects of the present invention: The dual-function electric power optical cable network line detection system and method described in the present invention can simultaneously detect online multiple optical cable optical paths between the main site of the power system and multiple substations, and simultaneously detect online the luminous and receiving optical fiber cores of the optical cable line. The detection process does not need to cut off the optical cable communication optical path, and does not affect normal optical communication. The problem of existing detection methods monopolizing the optical cable line core and wasting optical fiber resources is solved. There are no active devices such as optical switches in the slave device, which improves the operating reliability of the detection system, ensures the stable operation of the electric power optical cable network, and meets the detection needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1It is a structural schematic diagram of the dual-function power optical cable network line detection system described in the present invention. DETAILED DESCRIPTION

[0017] Specific implementation method 1. Combination Figure 1 The present embodiment is described, a dual-function power optical cable network line detection system, the detection system realizes the communication of the receiving optical path and the communication of the emitting optical path in the optical cable line, and realizes the simultaneous online detection of the emitting optical path and the receiving optical path in the optical cable line under the optical communication condition;

[0018] The system includes a master device of a main substation and slave devices of N (N=16) substations, and performs online detection on N optical cable network lines of a power optical cable network. The master device is installed in the main substation, and the N slave devices correspond to N different substations respectively. The master device includes N detection units, a control processor, an optical switch and an OTDR. Detection units 1, 2...N share a control processor, an optical switch and an OTDR. Unit i (1≤i≤N) and slave device i realize online detection of the transmitting optical fiber core and the receiving optical fiber core of the optical cable optical path i between the main substation and the substation i.

[0019] Each detection unit has the same structure, including wavelength division multiplexer 1, wavelength division multiplexer 2 and attenuator; each unit shares a control processor, an optical switch and an OTDR;

[0020] Each substation slave device includes a wavelength division multiplexer 3 and a wavelength division multiplexer 4. Each substation slave device has the same structure and uses a corresponding optical cable network line to connect the optical fiber distribution frame (ODF) on the master device side and the optical fiber distribution frame (ODF) on the slave device side;

[0021] The control processor is connected to the OTDR and the optical switch through the electrical interface, connected to the power system data transmission network through the RJ45 network port, and connected to the server to realize remote control.

[0022] Specific implementation method 2: This implementation method is a detection method of a dual-function power optical cable network line detection system described in specific implementation method 1. The specific implementation process of the method is as follows:

[0023] The control processor controls the OTDR optical interface to connect the optical switch, controls the optical path 0 to the optical path 1 of the optical switch to be connected to the port 3 of the wavelength division multiplexer 1 in the detection unit 1, injects the detection light of 1625nm wavelength, connects the second ODF of the master device end to the main road of the optical cable line 1 through the optical output port 2 of the wavelength division multiplexer 1, and then connects to the optical input port 2 of the wavelength division multiplexer 3 of the slave device 1 through the first ODF of the slave device end, and then connects to the port 3 of the wavelength division multiplexer 4 through the port 3 of the wavelength division multiplexer 3, and the port 2 of the wavelength division multiplexer 4 is connected to the main road of the optical cable line 1 through the first ODF of the slave device 1, and is connected to the port 2 of the wavelength division multiplexer 2 of the detection unit 1 through the second ODF of the master device end, and then is connected to the attenuator through the port 3 of the wavelength division multiplexer 2, so as to realize the online detection of the optical cable line 1 under the normal communication conditions of the light emitting and receiving optical paths of the optical cable line 1;

[0024] The control processor is connected to the OTDR through an electrical interface to realize sequential cyclic collection of detection data of N optical cable lines corresponding to the main substation and N substations, and upload them to the server; the control processor is connected to the optical switch through an electrical interface, and switches to port 3 of the wavelength division multiplexer 1 of each detection unit in sequence, and controls the OTDR to inject detection light into the corresponding emitting optical fiber core, thereby realizing sequential online detection of the emitting and receiving optical paths of each corresponding optical cable line.

[0025] The dual-function electric power optical cable network line detection method described in this embodiment can realize automatic detection of 16 optical cable optical paths between the main substation and 16 substations of the electric power optical cable network, including simultaneous detection of the transmitting fiber core and the receiving fiber core of the optical cable optical path between the main station and each station.

[0026] The optical switch in this embodiment is a 1×16 optical switch, the OTDR is an OTDR module, the wavelength division multiplexer 1 and the wavelength division multiplexer 4 are wavelength division multiplexer modules, and the wavelength division multiplexer 2 and the wavelength division multiplexer 3 are demultiplexer modules.

[0027] In this implementation, the control processor uses a single chip microcomputer of the STM8S103 series.

[0028] In this embodiment, the normal communication principle of the light emitting path and the light receiving path of the optical cable line 1 is as follows: Figure 1 In the embodiment, the transmitting end of the 1-channel transmitting optical fiber core 1 from the optical cable line 1 is connected to the 1310 / 1550nm wavelength light input port 1 of the wavelength division multiplexer 1 of the detection unit 1 in the master device, connected to the main line of the optical cable line 1 through the output port 2 of the wavelength division multiplexer 1, connected to the input port 2 of the wavelength division multiplexer 3 in the slave device 1, and connected to the receiving end of the 1-channel transmitting optical fiber core 1 through the output port 1 of the 1310 / 1550nm wavelength light of the wavelength division multiplexer 3, so as to realize the normal optical communication of the 1-channel emitting optical path of the optical cable line 1;

[0029] The transmitting end of the receiving optical fiber core 1 of the optical cable line 1 is connected to the main line of the optical cable line 1 through the optical input port 1 of the 1310 / 1550nm wavelength light of the wavelength division multiplexer 4 through the optical output port 2 of the wavelength division multiplexer 4, accessed to the optical input port 2 of the wavelength division multiplexer 2 of the detection unit 1 in the main equipment, and connected to the receiving end of the receiving optical fiber core 1 through the optical output port 1 of the wavelength division multiplexer 2, thereby realizing normal optical communication of the receiving optical path of the optical cable line 1.

[0030] In this embodiment, the principle of online detection of the light emitting path and the light receiving path of the optical cable line 1 is as follows: Figure 1 In the embodiment, a transmitting optical fiber core 1 from an optical cable line 1 is connected to a 1310 / 1550 nm wavelength optical inlet port 1 of a wavelength division multiplexer 1 of a detection unit 1 in a master device, connected to a main trunk of the optical cable line 1 through an optical outlet port 2 of the wavelength division multiplexer 1, connected to an optical inlet port 2 of a wavelength division multiplexer 3 in a slave device 1, connected to a 1625 nm optical inlet port 3 of a wavelength division multiplexer 4 through a 1625 nm demultiplexing optical port 3 of the wavelength division multiplexer 3, connected to the main trunk of the optical cable line 1 through an optical outlet port 2 of the wavelength division multiplexer 4, connected to an optical inlet port 2 of a wavelength division multiplexer 2 in a master device unit 1, connected to an attenuator through a 1625 nm demultiplexing optical port 3 of the wavelength division multiplexer 2;

[0031] The server controls the optical switch through the control processor to select optical path 0 to connect to optical path 1, and controls the OTDR to inject detection light into the 1625nm optical multiplexing port 3 of the wavelength division multiplexer through the optical switch. The detection light is transmitted from the optical output port 2 of the wavelength division multiplexer through the optical cable line 1 to the optical input port 2 of the wavelength division multiplexer 3 of the slave device 1, and the detection light is demultiplexed by the demultiplexing port 3 of the wavelength division multiplexer 3 to the multiplexing port 3 of the wavelength division multiplexer 4. The detection light is transmitted from the optical output port 2 of the wavelength division multiplexer 4 through the optical cable line 1 to the optical input port 2 of the wavelength division multiplexer 2 in the unit 1, and the detection light is demultiplexed by the demultiplexing port 3 of the wavelength division multiplexer 2. At this time, the optical cable line 1 is in the online detection mode;

[0032] The server controls the optical switch through the control processor, switches to the wavelength division multiplexer multiplexing port optical path of each optical cable line in sequence, realizes online detection of each optical cable line through OTDR, and uploads the detection results to the server.

Claims

1. The detection method of the dual-function power optical cable network line detection system is characterized by: The detection system realizes the communication of the receiving light path and the emitting light path in the optical cable line, and realizes the simultaneous online detection of the emitting light path and the receiving light path in the optical cable line under the optical communication condition; The detection system includes a master device and N slave devices, wherein the master device is installed in a main substation, and the N slave devices are installed in N substations respectively; The master device is composed of a control processor, an optical switch, an OTDR and N detection units, and is used to perform online detection of N optical cable lines between the master substation and N substations. One detection unit and one slave device jointly complete the online detection of a corresponding optical cable line; The N detection units share a control processor, an optical switch and an OTDR; the control processor is connected to the optical switch and the OTDR respectively through an electrical interface; Each detection unit includes a first wavelength division multiplexer, a second wavelength division multiplexer and an attenuator; Each slave device includes a third wavelength division multiplexer and a fourth wavelength division multiplexer; The control processor is connected to the power system data transmission network through the RJ45 network port, connected to the server, and realizes remote control of the main device; The specific implementation process of this detection method is as follows: The control processor controls the OTDR optical interface to connect to the optical switch, controls the optical path 0 to the optical path 1 of the optical switch to connect to the multiplexing port of the first wavelength division multiplexer in the corresponding detection unit, injects the detection light of 1625nm wavelength, connects the second optical fiber distribution frame at the master device end to the main road of the first optical cable line through the optical output port of the first wavelength division multiplexer, connects to the optical input port of the third wavelength division multiplexer of the corresponding slave device through the first optical fiber distribution frame at the slave device end, and then connects to the multiplexing port of the fourth wavelength division multiplexer through the demultiplexing port of the third wavelength division multiplexer, the optical output port of the fourth wavelength division multiplexer is connected to the main road of the first optical cable line through the first optical fiber distribution frame of the slave device, is connected to the optical input port of the second wavelength division multiplexer of the corresponding detection unit through the second optical fiber distribution frame at the master device end, and is connected to the attenuator through the demultiplexing port of the second wavelength division multiplexer, so as to realize the online detection of the light emitting optical path and the light receiving optical path in the corresponding optical cable line under the communication conditions; The control processor controls the optical switch and is cyclically connected to the first wavelength division multiplexer in each detection unit of the main device in sequence, so as to detect the light emitting path and the light receiving path of each optical cable line in sequence, and upload the detection results to the server through the control processor.

2. The detection method of the dual-function power optical cable network line detection system according to claim 1 is characterized by: The method also includes communication of a light-emitting optical path and communication of a light-receiving optical path; the communication process of the light-emitting optical path is: The emitting optical fiber core of the optical cable line i is connected to the light input port of the first wavelength division multiplexer of the detection unit i in the master device, connected to the optical cable line i through the light output port of the first wavelength division multiplexer, connected to the light input port of the third wavelength division multiplexer in the slave device i through the optical cable line i, and connected to the receiving end of the emitting optical fiber core through the light output port of the third wavelength division multiplexer, so as to realize optical communication of the emitting optical path of the optical cable line i; The transmitting end of the receiving optical fiber core of the optical cable line i is connected to the light input port of the fourth wavelength division multiplexer in the slave device i, and is connected to the optical cable line i through the light output port of the fourth wavelength division multiplexer. The optical cable line i is connected to the light input port of the second wavelength division multiplexer of the detection unit i in the master device, and is connected to the receiving end of the receiving optical fiber core through the light output port of the second wavelength division multiplexer, thereby realizing optical communication of the receiving optical path of the optical cable line i.

3. The detection method of the dual-function power optical cable network line detection system according to claim 2 is characterized in that: The transmitting end of the transmitting optical fiber core and the receiving end of the receiving optical fiber core are both connected to the detection unit through the optical fiber distribution frame, and the two ends of the optical cable line are respectively connected to the detection unit and the slave device through the optical fiber distribution frame; the receiving end of the transmitting optical fiber core and the transmitting end of the receiving optical fiber core are both connected to the optical fiber distribution frame.

4. The detection method of the dual-function power optical cable network line detection system according to claim 1 is characterized in that: The optical switch is a 1×16 optical switch, the first wavelength division multiplexer and the fourth wavelength division multiplexer are wavelength division multiplexer modules, and the second wavelength division multiplexer and the third wavelength division multiplexer are demultiplexer modules.

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