CN111313965A - Intelligent substation optical fiber link testing method and device - Google Patents
Intelligent substation optical fiber link testing method and device Download PDFInfo
- Publication number
- CN111313965A CN111313965A CN202010108345.4A CN202010108345A CN111313965A CN 111313965 A CN111313965 A CN 111313965A CN 202010108345 A CN202010108345 A CN 202010108345A CN 111313965 A CN111313965 A CN 111313965A
- Authority
- CN
- China
- Prior art keywords
- optical
- tested
- optical fiber
- port
- testing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 181
- 239000013307 optical fiber Substances 0.000 title claims abstract description 125
- 230000003287 optical effect Effects 0.000 claims abstract description 293
- 230000035945 sensitivity Effects 0.000 claims abstract description 31
- 241000272814 Anser sp. Species 0.000 claims description 34
- 238000000034 method Methods 0.000 claims description 24
- 238000004458 analytical method Methods 0.000 claims description 21
- 238000012545 processing Methods 0.000 claims description 19
- 238000006243 chemical reaction Methods 0.000 claims description 15
- 238000001914 filtration Methods 0.000 claims description 10
- 238000013507 mapping Methods 0.000 claims description 10
- 230000003321 amplification Effects 0.000 claims description 7
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 7
- 238000010998 test method Methods 0.000 claims description 7
- 238000005070 sampling Methods 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 239000000835 fiber Substances 0.000 claims description 3
- 206010034972 Photosensitivity reaction Diseases 0.000 claims 1
- 230000036211 photosensitivity Effects 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000005259 measurement Methods 0.000 description 8
- 230000008901 benefit Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 230000003993 interaction Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 206010034960 Photophobia Diseases 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 208000013469 light sensitivity Diseases 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
- H04B10/0795—Performance monitoring; Measurement of transmission parameters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02B90/20—Smart grids as enabling technology in buildings sector
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/124—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wired telecommunication networks or data transmission busses
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Optical Communication System (AREA)
Abstract
The application relates to an intelligent substation optical fiber link testing method and device, wherein a device to be tested is connected with a testing device through an optical fiber and a network cable, after an SCD file is obtained, the SCD file is rapidly analyzed, a virtual loop is automatically matched, and the state of an optical fiber link is associated. And then, the automatic test of the transmitting power and the receiving sensitivity of the optical port can be carried out. The optical power test adopts an optical power test module comprising a logarithmic ratio amplifier, and the test of the optical receiving sensitivity utilizes a sensitivity test module for controlling the optical attenuation by using an MEMS technology, so that higher test precision can be ensured, and errors can be reduced. The device can test 8 paths of optical ports simultaneously, greatly improves the test efficiency, improves the test precision, shortens the test period in the debugging stage, and saves the cost of manpower and material resources.
Description
Technical Field
The application belongs to the technical field of optical fiber communication, and particularly relates to a method and a device for testing an optical fiber link of an intelligent substation
Background
With the rapid development of the intelligent substation, optical fiber communication has become the most important transmission channel of the protection system in the intelligent substation. Countries and enterprises set a considerable number of standards, and specific test requirements are provided for performance indexes (light receiving and transmitting power, receiving sensitivity and the like) of optical fiber interfaces and channels of intelligent substations. However, the number of optical fibers in an intelligent substation is large, for example, about 600 optical fibers in a typical 220kV station, and it becomes a heavy task to perform testing on such a large number of optical fiber ports in a debugging and acceptance stage.
The conventional testing method in the existing transformer substation still adopts a plurality of devices such as a light source, an optical power meter and an optical attenuator to carry out manual combination, and has complex wiring and low testing efficiency. If the manual testing mode is adopted, calculation is carried out according to one working surface, and the testing period of the 220kV whole station optical fiber needs more than 10 days. The complexity of the testing process and the low efficiency of manual testing seriously affect the debugging progress and the debugging quality of the intelligent substation.
Therefore, at present, a small amount of optical fibers are generally selected to carry out simple tests, not only are test items incomplete, but also all optical fibers cannot be covered far away, and the defect-free operation of an optical fiber link of an intelligent substation cannot be guaranteed.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the problems of low testing efficiency and low precision of testing the performance indexes of the optical fiber interface and the channel of the intelligent substation in the prior art are solved.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the invention provides a method for testing an optical fiber link of an intelligent substation, which comprises the following steps:
step 1, analyzing an SCD file of an intelligent substation to obtain a virtual-real link mapping relation of an optical fiber link of a device to be tested;
step 2, receiving an optical signal containing a GOOSE message or an SV message sent by a tested light port of the device to be tested through an optical fiber, and carrying out analytic test on the optical signal to obtain the sending light power of the tested light port of the device to be tested;
and 3, sending an optical signal containing a GOOSE message or an SV message to a tested light port of the device to be tested through an optical fiber, gradually adjusting an optical power attenuation value of the tested light port through a dichotomy, and measuring the light power received by the tested light port of the device to be tested when the optical fiber disconnection warning information is detected, wherein the measured light power is the light receiving sensitivity of the device to be tested.
Further, according to the method for testing the optical fiber link of the intelligent substation in the first aspect of the present invention, step 1 includes:
automatically analyzing the SCD file of the intelligent substation to acquire configuration information of the intelligent substation;
and automatically matching a virtual loop according to the virtual terminal connection relation in the SCD file and an IEC61850 protocol, associating the states of the optical fiber links, and realizing the quick mapping of the virtual and real optical links of the optical fiber links of the intelligent substation.
Further, according to the method for testing an optical fiber link of an intelligent substation in the first aspect of the present invention, the step of automatically parsing the SCD file of the intelligent substation includes:
establishing an IED equipment list of the intelligent substation;
acquiring identifier coding information of each IED device in a source file of an SCD file;
and analyzing the changed IED equipment in the IED equipment list according to the obtained identifier coding information.
Further, according to the method for testing an optical fiber link of an intelligent substation in the first aspect of the present invention, in step 2, the step of performing an analysis test on the optical signal includes:
and carrying out photoelectric conversion on the optical signal, carrying out exponential amplification, filtering and analog-to-digital conversion on the converted electric signal, and carrying out operation processing to obtain the transmitting optical power of the optical port of the device to be tested.
Further, according to the method for testing the optical fiber link of the intelligent substation in the first aspect of the present invention, step 3 includes:
adjusting the optical power attenuation value of the detected optical port, simultaneously acquiring an MMS (multimedia messaging service) message of a station control layer, and when the optical power attenuation value is adjusted to the set maximum value of the optical power attenuation value and optical fiber broken link warning information in the MMS message is detected, indicating that the optical fiber link is connected perfectly;
adjusting the optical power attenuation value of the optical channel corresponding to the detected optical port to 0;
and gradually increasing the optical power attenuation value of the tested light port by bisection, and recording the optical power received by the tested light port of the device to be tested at the moment when the optical fiber broken link alarm information in the MMS message is detected, namely the optical receiving sensitivity of the device to be tested.
Further, according to the method for testing an optical fiber link of an intelligent substation in the first aspect of the present invention, optical signals including GOOSE messages or SV messages sent by a plurality of tested optical ports of a device to be tested are received simultaneously through optical fibers, and the method in step 2 is adopted to measure the sending optical powers of the plurality of tested optical ports simultaneously; and (3) simultaneously sending optical signals containing GOOSE messages or SV messages to a plurality of tested ports of the device to be tested through optical fibers, and simultaneously measuring the light receiving sensitivity of the plurality of tested ports by adopting the method in the step 3.
The second aspect of the invention provides an optical fiber link testing device for an intelligent substation, wherein the testing device is connected with a tested optical port of a device to be tested through an optical fiber and is used for transmitting optical signals; the testing device is connected with a network port of the device to be tested through a network cable and is used for transmitting MMS messages of a station control layer; the test device includes:
the SCD file analysis module is used for analyzing the SCD file of the intelligent substation to obtain a virtual-real link mapping relation of an optical fiber link of the device to be tested;
the optical power testing module is used for receiving an optical signal which contains a GOOSE message or an SV message and is sent by a tested optical port of the device to be tested through an optical fiber, and analyzing and testing the optical signal to obtain the sending optical power of the tested optical port of the device to be tested;
the optical receiving sensitivity testing module is used for sending an optical signal containing a GOOSE message or an SV message to a tested optical port of the device to be tested through an optical fiber, gradually adjusting an optical power attenuation value of the tested optical port through a dichotomy, and measuring the obtained optical power received by the tested optical port of the device to be tested when the optical fiber broken link alarm information is detected, namely the optical receiving sensitivity of the device to be tested;
the control processing module is used for analyzing and processing the electric signal obtained after the analysis and the test of the optical power test module to obtain the transmitting optical power of the tested optical port of the device to be tested; and the optical power attenuation module is used for acquiring the MMS message of the station control layer and sending the optical power attenuation value to be regulated to the MEMS variable optical attenuation module according to the detected MMS message optical fiber broken link alarm information.
Further, according to the intelligent substation optical fiber link testing device of the second aspect of the present invention, the optical power testing module includes:
the photoelectric conversion unit is used for converting an optical signal containing a GOOSE message or an SV message sent by an optical port of the device to be tested into an electric signal;
the signal amplification unit is used for carrying out exponential amplification on the electric signal;
the filtering unit is used for filtering the amplified electric signal;
and the ADC sampling unit is used for performing analog-to-digital conversion on the filtered electric signal and sending the digital electric signal subjected to analog-to-digital conversion to the control processing module for analysis processing to obtain the sending light power of the detected light port.
Further, according to the intelligent substation optical fiber link testing device of the second aspect of the present invention, the optical sensitivity testing module includes:
the MEMS variable optical attenuation module is used for receiving an optical signal containing a GOOSE message/SV message and automatically adjusting an optical power attenuation value of the optical signal by utilizing a dichotomy according to optical fiber broken link alarm information in the MMS message;
the input end of the 1-in-2 optical splitter is connected with the output end of the MEMS variable optical attenuation module, one output end of the 1-in-2 optical splitter is connected to the optical power testing module, and the other output end of the 1-in-2 optical splitter is connected to the RX end of a tested optical port of a tested device;
and the optical power testing module is used for detecting the optical power value after the optical power attenuation.
Further, according to the intelligent substation optical fiber link testing device in the second aspect of the present invention, the testing device includes a plurality of testing optical channels, and a TX end of each testing optical channel is connected to an RX end of a corresponding tested optical port of the device under test through an optical fiber; the RX end of each test optical channel is connected with the TX end of the corresponding tested optical port of the device to be tested through an optical fiber; and the plurality of testing optical channels simultaneously send or receive optical signals containing GOOSE messages or SV messages, so that a plurality of tested optical ports can be simultaneously tested.
The invention has the beneficial effects that: the MEMS module adopted by the light receiving sensitivity test keeps the comprehensive optical performance of the VOA in the traditional technology, and has the advantages of large attenuation range, low driving voltage, small volume, easy multi-channel integration, high response speed, high cost performance and the like. The MEMS module is adopted to carry out the light sensitivity test, so that the test error caused by the traditional manual test method is greatly reduced, and the defect of complicated operation is overcome.
Compared with the method for setting the optical power attenuation with the equal step length change, the method for controlling the optical power attenuation by the dichotomy greatly reduces the change times of the step length, saves the test time and greatly improves the working efficiency.
The invention can test the multi-path optical ports simultaneously, greatly improves the test efficiency, improves the test precision, shortens the test period in the debugging stage, saves the cost of manpower and material resources, and reduces the loss caused by repeated plugging of the optical fiber in the manual test.
The method has the advantages of improving the speed of SCD file analysis, effectively reducing the analysis time of the SCD file, reducing the occupation rate of CPU and memory resources, and effectively releasing hardware resources.
Drawings
The technical solution of the present application is further explained below with reference to the drawings and the embodiments.
FIG. 1 is a schematic diagram of a testing apparatus according to an embodiment of the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The technical solutions of the present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Example 1
The embodiment provides an intelligent substation optical fiber link testing method, which comprises the following steps:
step 1, analyzing an SCD file of an intelligent substation to obtain a virtual-real link mapping relation of an optical fiber link of a device to be tested;
step 2, receiving an optical signal containing a GOOSE message or an SV message sent by a tested light port of the device to be tested through an optical fiber, and carrying out analytic test on the optical signal to obtain the sending light power of the tested light port of the device to be tested;
and 3, sending an optical signal containing a GOOSE message or an SV message to a tested light port of the device to be tested through an optical fiber, gradually adjusting an optical power attenuation value of the tested light port through a dichotomy, and measuring the light power received by the tested light port of the device to be tested when the optical fiber disconnection warning information is detected, wherein the measured light power is the light receiving sensitivity of the device to be tested.
The test method of this embodiment is implemented by the test apparatus shown in fig. 1, and when the test apparatus of this embodiment is used for testing, the TX end of the tested optical port of the device to be tested is connected to the RX end of the test apparatus through an optical fiber, and the RX end of the tested optical port of the device to be tested is connected to the TX end of the test apparatus through an optical fiber, so as to perform the test of the optical fiber link signal for the transmission and reception of the optical signal including the GOOSE packet/SV packet.
During testing, firstly, an SCD file configured by a whole intelligent substation station is led into a testing device, the SCD file of the intelligent substation is automatically analyzed, configuration information of the intelligent substation is obtained, a virtual circuit is automatically matched according to an IEC61850 protocol through a virtual terminal connection relation in the SCD file, the state of an optical fiber link is associated, and quick mapping of a virtual link and a real link of the optical fiber link of the intelligent substation is achieved.
Further, in this embodiment, the method for automatically analyzing the SCD file of the intelligent substation includes: and establishing an IED equipment list through traversal search, calculating the offset of each IED equipment in a source file of the SCD file, and quickly analyzing the selected IED equipment. Compared with the method that when the SCD file is opened, all IED devices are comprehensively analyzed, and then the IED device list is established, the analysis speed of the SCD file is increased, and the analysis time of the SCD file is effectively reduced.
The device to be tested sends an optical signal containing a GOOSE message/SV message signal from the TX port to the testing device shown in fig. 1 through an optical fiber, performs photoelectric conversion on the received optical signal inside the testing device, performs exponential amplification on the converted electrical signal, and performs operation processing on the obtained digital electrical signal after filtering and analog-to-digital conversion, thereby obtaining the sending optical power of the tested port.
The embodiment adopts the optical power testing module with the logarithmic ratio amplifier to automatically test the transmitting optical power of the tested optical port with high precision. The logarithmic amplifier is used for exponentially amplifying the electric signals, the dynamic range of the acceptable input signals is large, the wide dynamic range signals are compressed, the signal measurement can be realized by using the measuring circuit with lower resolution, the range does not need to be switched, the gear shifting error is avoided, and the measurement precision is greatly improved.
In this embodiment, a variable optical power attenuation module based on an MEMS (Micro-Electro-Mechanical System, Micro Electro-Mechanical System) is used to adjust an optical power attenuation value, and according to whether an MMS message fed back by the variable optical power attenuation module has optical fiber link breakage warning information, a dichotomy is used to automatically adjust the optical power attenuation value, so as to test the optical receiving sensitivity of a tested optical port, which is specifically as follows:
first, the connection of the fiber optic test link is tested: adjusting the optical power attenuation value of the detected optical port, simultaneously acquiring an MMS (multimedia messaging service) message of a station control layer, and when the optical power attenuation value is adjusted to the set maximum value of the optical power attenuation value and optical fiber broken link warning information in the MMS message is detected, indicating that the optical fiber link is connected perfectly;
after the connection of the test link is determined to be complete, starting to test the light receiving sensitivity, adjusting the optical power attenuation value of the optical channel corresponding to the tested optical port to 0, and gradually increasing the optical power attenuation value of the tested optical port by a bisection method (wherein the optical power attenuation value increased for the first time is half of the maximum value of the set optical power attenuation value);
when the optical fiber broken link warning information in the MMS message is detected, the light power received by the light port of the device to be tested at the moment is recorded, namely the light receiving sensitivity of the device to be tested is obtained.
In this embodiment, the network port of the device under test is connected to the RJ45 network port of the RJ45 electrical module of the testing device through a network cable, and is mainly used to obtain the optical fiber link failure warning information in the MMS message of the station control layer.
In a more optimized implementation, in order to further improve the testing efficiency, in combination with practical application experience, a plurality of testing optical channels are set in this embodiment, 8 testing optical channels are set in this embodiment in fig. 1, and optical signals containing GOOSE packets or SV packets sent by 8 tested ports of a device to be tested can be sent and received simultaneously through optical fibers, so that the tested port sending power and the optical receiving sensitivity of 8 optical fibers can be tested at one time. Compared with the manual traditional plug-in test method of the single-path optical port, the test method of the embodiment has the advantage that the test efficiency is improved by more than ten times.
In this embodiment, the device to be tested is connected to the testing device through the optical fiber and the network cable, so that the high-precision and high-efficiency test of the transmission power of the tested optical port and the receiving sensitivity of the tested optical port of the optical fiber can be realized.
Example 2
The embodiment provides an optical fiber link testing device for an intelligent substation, which is connected with a tested optical port of a device to be tested through an optical fiber and used for transmitting optical signals; the testing device is connected with a network port of the device to be tested through a network cable and is used for transmitting MMS messages of a station control layer; the test device includes:
the SCD file analysis module is used for analyzing the SCD file of the intelligent substation to obtain a virtual-real link mapping relation of an optical fiber link of the device to be tested;
the optical power testing module is used for receiving an optical signal which contains a GOOSE message or an SV message and is sent by a tested optical port of the device to be tested through an optical fiber, and analyzing and testing the optical signal to obtain the sending optical power of the tested optical port of the device to be tested;
the optical receiving sensitivity testing module is used for sending an optical signal containing a GOOSE message or an SV message to a tested optical port of the device to be tested through an optical fiber, gradually adjusting an optical power attenuation value of the tested optical port through a dichotomy, and measuring the obtained optical power received by the tested optical port of the device to be tested when the optical fiber broken link alarm information is detected, namely the optical receiving sensitivity of the device to be tested;
the control processing module is used for analyzing and processing the electric signal obtained after the analysis and the test of the optical power test module to obtain the transmitting optical power of the tested optical port of the device to be tested; and the optical power attenuation module is used for acquiring the MMS message of the station control layer and sending the optical power attenuation value to be regulated to the MEMS variable optical attenuation module according to the detected MMS message optical fiber broken link alarm information.
In this embodiment, the SCD file configured in the total station is imported into the testing apparatus, and the SCD file is rapidly analyzed by the SCD file analysis module, and the virtual circuit is automatically matched according to the IEC61850 protocol through the connection relationship of the virtual terminals in the SCD file, so as to rapidly associate the states of the optical fiber links, thereby implementing rapid mapping of the virtual and real links of the total station optical fiber links.
The optical power test module of the embodiment includes:
the photoelectric conversion unit is a photoelectric converter and is used for converting an optical signal containing a GOOSE message or an SV message sent by an optical port of the device to be tested into an electric signal;
the signal amplifying unit adopts a logarithmic ratio amplifier, and the signal amplifying unit is mainly used for exponentially amplifying the electric signal transmitted by the photoelectric converter. The dynamic range of the input signal which can be accepted by the logarithmic ratio amplifier is wider, the signal measurement can be realized by using the measuring circuit with lower resolution after the wide dynamic range signal is compressed, the range does not need to be switched, and the gear shifting error is avoided. In addition, the log ratio amplifier adopts a transconductance linear technology, optimizes the low-frequency signal power measurement in the optical fiber, has the maximum log linearity error of 0.1dB, is provided with an internal temperature compensation circuit, and greatly improves the measurement precision.
And the filtering unit is mainly used for filtering the noise and harmonic waves of the input amplified electric signal, ensuring that the frequency of the input signal after filtering is lower than 1/2 of Nyquist bandwidth, and avoiding aliasing phenomenon when the ADC sampling unit at the rear end samples the input signal.
And the ADC sampling unit is an analog-to-digital converter and is used for performing analog-to-digital conversion on the filtered electric signal and sending the electric signal to the control processing module for analysis processing to obtain the sending light power of the detected light port. To ensure high-precision sampling, a 24-bit ADC is preferred.
In general, after the interior of the optical power test module is subjected to multiple times of circuit noise optimization, the high-precision test of the power of the tested optical port can be realized within the test range of +10dBm to-60 dBm.
The light receiving sensitivity test module of the present embodiment includes:
and the MEMS variable optical attenuation module is used for receiving the optical signal containing the GOOSE message/SV message and automatically adjusting the optical power attenuation value of the optical signal bearing the GOOSE message/SV message by utilizing a dichotomy.
The input end of the 1-to-2 optical splitter is connected with the output end of the MEMS variable optical attenuation module, an optical signal attenuated by the MEMS variable optical attenuation module enters the 1-to-2 optical splitter, one output of the 1-to-2 optical splitter is connected to the optical power testing module, and the other output of the 1-to-2 optical splitter is connected to the RX end, corresponding to a tested port, of the tested device.
And the optical power testing module is used for detecting the optical power value after the optical power attenuation. In this embodiment, the optical power testing module is the same as the optical power testing module described above.
The dichotomy control optical power attenuation mode adopted by the optical receiving sensitivity test module greatly reduces the change times of optical power attenuation step length, saves test time and greatly improves working efficiency.
The control processing module of this embodiment adopts a CPU control processor. The CPU control processor is used for carrying out operation processing on the electric signal subjected to analog-to-digital conversion by the optical power testing module to obtain the transmitting optical power of a tested optical port of the device to be tested; the system comprises an optical power attenuation module, an MEMS variable optical attenuation module, a monitoring module and a monitoring module, wherein the optical power attenuation module is used for acquiring an MMS message of a station control layer and sending an optical power attenuation value to be regulated to the MEMS variable optical attenuation module according to the detected MMS message optical fiber broken link alarm information; and is used for controlling the work of the optical power detection module and obtaining the optical power value measured by the optical power detection module.
As shown in fig. 1, when the test apparatus of this embodiment is used to perform a test, the TX end of the tested port of the device under test is connected to the RX end of the test apparatus through an optical fiber, and the RX end of the tested port of the device under test is connected to the TX end of the test apparatus through an optical fiber, so as to perform a test on an optical fiber link signal for transmitting and receiving an optical signal including a GOOSE message/SV message. Meanwhile, the device to be tested is connected with the RJ45 electric module of the testing device through a network cable, and the device to be tested is used for acquiring the MMS message of the station control layer so as to detect whether the optical fiber broken link warning information exists or not.
And (3) SCD file analysis: during testing, firstly, an SCD file configured by the whole intelligent substation is led into a testing device, the SCD file of the intelligent substation is automatically analyzed through an SCD file analysis module, a virtual circuit is automatically matched according to an IEC61850 protocol, and the state of an optical fiber circuit is associated.
In this embodiment, the CPU controls the processor to obtain the SCD file analysis result, and according to the SCD file analysis result, the state of the optical fiber link may be automatically obtained, and when the optical fiber link disconnection warning information of the station control layer MMS message is detected, the optical fiber link information in which the link disconnection warning specifically occurs may be automatically associated.
The method for automatically analyzing the SCD file of the intelligent substation comprises the following steps: through traversal and search, an IED device list is established, identifier coding information of each IED device in a source file of an SCD file is obtained, and changed IED devices in the IED device list are rapidly analyzed according to the identifier coding information. In the analysis method of this embodiment, only changed IED devices are re-analyzed each time the SCD file is analyzed. Compared with the mode that when the SCD file is opened, all IED equipment is comprehensively analyzed, and then the IED equipment list is established, the SCD file analyzing speed is improved, and the SCD file analyzing time is effectively shortened.
Transmitting light power test: the device to be tested transmits the optical signal containing GOOSE message/SV message from the TX port to the test device shown in fig. 1 through the optical fiber. The testing device analyzes, configures and checks the received GOOSE message/SV message information according to the imported SCD file, and enters the optical power testing module after confirming that no errors exist. The optical power testing module enables optical signals containing GOOSE messages/SV messages to pass through a photoelectric converter, a log ratio amplifier, a filter circuit and a high-precision ADC, and then the optical signals enter a CPU control processor for operation processing, so that the transmitting power of a specific tested optical port can be obtained.
And (3) testing the light receiving sensitivity: the testing device sends an optical signal carrying a GOOSE message/SV message to a tested port of the device to be tested through an optical fiber, adjusts an optical power attenuation value through the MEMS variable optical attenuation module, adjusts the optical power attenuation value in the direction of the maximum value of the optical power attenuation value, and detects whether the MMS message transmitted through the RJ45 electric module has optical fiber broken link warning information or not. If the optical fiber link breakage warning information is not detected, the optical power attenuation value is not adjusted to the maximum value, and the optical power attenuation value is continuously adjusted and increased;
if the optical fiber broken link alarm information is detected, recording the optical power attenuation value at the moment as the maximum optical power attenuation value;
the optical power attenuation value is adjusted to 0, and the optical power attenuation value is gradually increased by using a dichotomy (the optical power attenuation value increased for the first time is half between 0 and the maximum optical attenuation). Meanwhile, whether optical fiber link breaking warning information exists in an MMS message transmitted by the RJ45 electric module is detected, and if no warning information exists, the optical power attenuation value is continuously increased by utilizing the bisection method;
if the optical fiber link breakage warning information is detected, the optical power obtained by the measurement at this time is recorded (the measurement of the optical power is recorded as the measurement of the inside of the testing device is automatically performed by using an optical power testing module), namely the optical receiving sensitivity of the tested optical port.
Furthermore, the present embodiment is provided with a human-computer interaction module, and the testing device displays the measured transmitted optical power and the measured optical receiving sensitivity of the optical port to be tested through the human-computer interaction module. In addition, the information of the current device to be tested can be displayed through the interpersonal interaction module, and the information comprises an IP address, test optical channel information, optical power attenuation step length and the like.
In a further embodiment, the test device can simultaneously test a plurality of optical ports of the device under test. In this embodiment, the test apparatus shown in fig. 1 includes 8 test optical channels, and a TX end of each test optical channel is connected to an RX end of a corresponding tested optical port of the device under test through an optical fiber; the RX end of each test optical channel is connected with the TX end of the corresponding tested optical port of the device to be tested through an optical fiber; and the plurality of test optical channels simultaneously transmit or receive optical signals containing GOOSE messages or SV messages.
This embodiment can once only be once only tested 8 of the device under test by the sending optical power and the light receiving sensitivity of light mouth, can reduce test time greatly, has improved intelligent substation's debugging efficiency, shortens the test period in the debugging stage, practices thrift manpower and materials cost. Compared with the manual traditional plug-in test method of the single-path optical port, the test efficiency is improved by more than ten times, and meanwhile, the loss caused by repeated plug-in of the optical fiber in the manual test is reduced.
The optical power measuring device integrates a power testing process, a power attenuation process and the like into the testing device, can complete the whole test by one key, does not need to be provided with redundant auxiliary equipment, and saves manpower and material resources.
The light receiving sensitivity test of this embodiment is through selecting many curve fitting results, avoids adopting the error of single least square method fitting among the prior art, in addition, has still carried out the processing of factors such as noise and ambient temperature, calibrates the testing result, and the precision obtains further promotion, and testing arrangement's measuring accuracy is superior to 0.1 dbm.
In light of the foregoing description of the preferred embodiments according to the present application, it is to be understood that various changes and modifications may be made without departing from the spirit and scope of the invention. The technical scope of the present application is not limited to the contents of the specification, and must be determined according to the scope of the claims.
Claims (10)
1. The method for testing the optical fiber link of the intelligent substation is characterized by comprising the following steps:
step 1, analyzing an SCD file of an intelligent substation to obtain a virtual-real link mapping relation of an optical fiber link of a device to be tested;
step 2, receiving an optical signal containing a GOOSE message or an SV message sent by a tested light port of the device to be tested through an optical fiber, and carrying out analytic test on the optical signal to obtain the sending light power of the tested light port of the device to be tested;
and 3, sending an optical signal containing a GOOSE message or an SV message to a tested light port of the device to be tested through an optical fiber, gradually adjusting an optical power attenuation value of the tested light port through a dichotomy, and measuring the optical power received by the tested light port of the device to be tested when the optical fiber disconnection warning information is detected, wherein the optical power is the optical receiving sensitivity of the device to be tested.
2. The intelligent substation optical fiber link testing method according to claim 1, wherein step 1 comprises:
automatically analyzing the SCD file of the intelligent substation to acquire configuration information of the intelligent substation;
and automatically matching a virtual loop according to the virtual terminal connection relation in the SCD file and an IEC61850 protocol, associating the states of the optical fiber links, and realizing the quick mapping of the virtual and real optical links of the optical fiber links of the intelligent substation.
3. The intelligent substation optical fiber link testing method according to claim 2, wherein the step of automatically parsing the SCD file of the intelligent substation comprises:
establishing an IED equipment list of the intelligent substation;
acquiring identifier coding information of each IED device in a source file of an SCD file;
and analyzing the changed IED equipment in the IED equipment list according to the obtained identifier coding information.
4. The intelligent substation optical fiber link test method according to claim 1, wherein in step 2, the step of performing analytical test on the optical signal comprises:
and carrying out photoelectric conversion on the optical signal, carrying out exponential amplification, filtering and analog-to-digital conversion on the converted electric signal, and carrying out operation processing to obtain the transmitting optical power of the optical port of the device to be tested.
5. The intelligent substation optical fiber link testing method according to claim 1, wherein step 3 comprises:
adjusting the optical power attenuation value of the detected optical port, simultaneously acquiring an MMS (multimedia messaging service) message of a station control layer, and when the optical power attenuation value is adjusted to the set maximum value of the optical power attenuation value and optical fiber broken link warning information in the MMS message is detected, indicating that the optical fiber link is connected perfectly;
adjusting the optical power attenuation value of the optical channel corresponding to the detected optical port to 0;
and gradually increasing the optical power attenuation value of the tested light port by bisection, and recording the optical power received by the tested light port of the device to be tested at the moment when the optical fiber broken link alarm information in the MMS message is detected, namely the optical receiving sensitivity of the device to be tested.
6. The intelligent substation optical fiber link test method according to claim 1, wherein optical signals containing GOOSE messages or SV messages sent by a plurality of tested optical ports of a device to be tested are received simultaneously through optical fibers, and the method of step 2 is adopted to measure the sending optical power of the plurality of tested optical ports simultaneously; and (3) simultaneously sending optical signals containing GOOSE messages or SV messages to a plurality of tested ports of the device to be tested through optical fibers, and simultaneously measuring the light receiving sensitivity of the plurality of tested ports by adopting the method in the step 3.
7. The intelligent substation optical fiber link testing device is characterized in that the testing device is connected with a tested optical port of a device to be tested through an optical fiber and used for transmitting optical signals; the testing device is connected with a network port of the device to be tested through a network cable and is used for transmitting MMS messages of a station control layer; the test device includes:
the SCD file analysis module is used for analyzing the SCD file of the intelligent substation to obtain a virtual-real link mapping relation of an optical fiber link of the device to be tested;
the optical power testing module is used for receiving an optical signal which contains a GOOSE message or an SV message and is sent by a tested optical port of the device to be tested through an optical fiber, and analyzing and testing the optical signal to obtain the sending optical power of the tested optical port of the device to be tested;
the optical receiving sensitivity testing module is used for sending an optical signal containing a GOOSE message or an SV message to a tested optical port of the device to be tested through an optical fiber, gradually adjusting an optical power attenuation value of the tested optical port through a dichotomy, and measuring the obtained optical power received by the tested optical port of the device to be tested when the optical fiber broken link alarm information is detected, namely the optical receiving sensitivity of the device to be tested;
the control processing module is used for analyzing and processing the electric signal obtained after the analysis and the test of the optical power test module to obtain the transmitting optical power of the tested optical port of the device to be tested; and the optical power attenuation module is used for acquiring the MMS message of the station control layer and sending the optical power attenuation value to be regulated to the MEMS variable optical attenuation module according to the detected MMS message optical fiber broken link alarm information.
8. The intelligent substation fiber optic link testing device of claim 7, wherein the optical power testing module comprises:
the photoelectric conversion unit is used for converting an optical signal containing a GOOSE message or an SV message sent by an optical port of the device to be tested into an electric signal;
the signal amplification unit is used for carrying out exponential amplification on the electric signal;
the filtering unit is used for filtering the amplified electric signal;
and the ADC sampling unit is used for performing analog-to-digital conversion on the filtered electric signal and sending the digital electric signal subjected to analog-to-digital conversion to the control processing module for analysis processing to obtain the sending light power of the detected light port.
9. The intelligent substation fiber optic link testing device of claim 7, wherein the photosensitivity testing module comprises:
the MEMS variable optical attenuation module is used for receiving an optical signal containing a GOOSE message/SV message and automatically adjusting an optical power attenuation value of the optical signal by utilizing a dichotomy according to optical fiber broken link alarm information in the MMS message;
the input end of the 1-in-2 optical splitter is connected with the output end of the MEMS variable optical attenuation module, one output end of the 1-in-2 optical splitter is connected to the optical power testing module, and the other output end of the 1-in-2 optical splitter is connected to the RX end of a tested optical port of a tested device;
and the optical power testing module is used for detecting the optical power value after the optical power attenuation.
10. The intelligent substation optical fiber link testing device according to claim 7, wherein the testing device comprises a plurality of testing optical channels, and a TX end of each testing optical channel is connected with an RX end of a corresponding tested optical port of the device to be tested through an optical fiber; the RX end of each test optical channel is connected with the TX end of the corresponding tested optical port of the device to be tested through an optical fiber; and the plurality of testing optical channels simultaneously send or receive optical signals containing GOOSE messages or SV messages, so that a plurality of tested optical ports can be simultaneously tested.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010108345.4A CN111313965A (en) | 2020-02-21 | 2020-02-21 | Intelligent substation optical fiber link testing method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010108345.4A CN111313965A (en) | 2020-02-21 | 2020-02-21 | Intelligent substation optical fiber link testing method and device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111313965A true CN111313965A (en) | 2020-06-19 |
Family
ID=71160090
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010108345.4A Pending CN111313965A (en) | 2020-02-21 | 2020-02-21 | Intelligent substation optical fiber link testing method and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111313965A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112433082A (en) * | 2020-10-30 | 2021-03-02 | 国网山东省电力公司青岛供电公司 | Optical fiber voltage measuring system and method |
| CN113078944A (en) * | 2021-03-23 | 2021-07-06 | 国网北京市电力公司 | Device and method for testing single fiber supported by double-fiber optical network port of transformer substation testing equipment |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW499570B (en) * | 1999-09-27 | 2002-08-21 | Jds Uniphase Corp | MEMS variable optical attenuator |
| CN102299739A (en) * | 2011-07-29 | 2011-12-28 | 深圳市国扬通信股份有限公司 | Test method for SFP (small form-factor pluggable) module and test terminal thereof |
| CN104346474A (en) * | 2014-11-19 | 2015-02-11 | 国家电网公司 | Quick analysis method for intelligent substation SCD (System Configuration Description) file |
| CN105242164A (en) * | 2015-08-21 | 2016-01-13 | 国电南瑞科技股份有限公司 | Automatic detection system and method of secondary virtual loop of intelligent transformer station |
| CN105737977A (en) * | 2016-04-15 | 2016-07-06 | 博创科技股份有限公司 | Wide-range optical power meter |
| CN106230501A (en) * | 2016-08-03 | 2016-12-14 | 深圳市共进电子股份有限公司 | Laser diode launches optical power adjusting method, Apparatus and system |
| CN107425604A (en) * | 2017-06-25 | 2017-12-01 | 武汉凯默电气有限公司 | A kind of optical fiber connection visualization real-time monitoring method of intelligent substation |
| CN206960714U (en) * | 2017-07-10 | 2018-02-02 | 深圳市隆信祥科技有限公司 | A kind of digital program controlled optical attenuator of adjustable type with luminous power detection |
| CN108494479A (en) * | 2018-03-28 | 2018-09-04 | 国网福建省电力有限公司电力科学研究院 | Intelligent substation intelligent terminal optical receiver sensitivity self-operated measuring unit and its method |
| CN207939514U (en) * | 2018-03-28 | 2018-10-02 | 国网福建省电力有限公司电力科学研究院 | A kind of intelligent substation intelligent terminal optical receiver sensitivity self-operated measuring unit |
| CN108847884A (en) * | 2018-04-03 | 2018-11-20 | 国网福建省电力有限公司电力科学研究院 | Intelligent substation protective device optical power and optical receiver sensitivity method for automatic measurement |
| CN109459614A (en) * | 2018-12-07 | 2019-03-12 | 深圳市鼎阳科技有限公司 | A kind of spectrum analyzer and its method for searching for signal |
-
2020
- 2020-02-21 CN CN202010108345.4A patent/CN111313965A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW499570B (en) * | 1999-09-27 | 2002-08-21 | Jds Uniphase Corp | MEMS variable optical attenuator |
| CN102299739A (en) * | 2011-07-29 | 2011-12-28 | 深圳市国扬通信股份有限公司 | Test method for SFP (small form-factor pluggable) module and test terminal thereof |
| CN104346474A (en) * | 2014-11-19 | 2015-02-11 | 国家电网公司 | Quick analysis method for intelligent substation SCD (System Configuration Description) file |
| CN105242164A (en) * | 2015-08-21 | 2016-01-13 | 国电南瑞科技股份有限公司 | Automatic detection system and method of secondary virtual loop of intelligent transformer station |
| CN105737977A (en) * | 2016-04-15 | 2016-07-06 | 博创科技股份有限公司 | Wide-range optical power meter |
| CN106230501A (en) * | 2016-08-03 | 2016-12-14 | 深圳市共进电子股份有限公司 | Laser diode launches optical power adjusting method, Apparatus and system |
| CN107425604A (en) * | 2017-06-25 | 2017-12-01 | 武汉凯默电气有限公司 | A kind of optical fiber connection visualization real-time monitoring method of intelligent substation |
| CN206960714U (en) * | 2017-07-10 | 2018-02-02 | 深圳市隆信祥科技有限公司 | A kind of digital program controlled optical attenuator of adjustable type with luminous power detection |
| CN108494479A (en) * | 2018-03-28 | 2018-09-04 | 国网福建省电力有限公司电力科学研究院 | Intelligent substation intelligent terminal optical receiver sensitivity self-operated measuring unit and its method |
| CN207939514U (en) * | 2018-03-28 | 2018-10-02 | 国网福建省电力有限公司电力科学研究院 | A kind of intelligent substation intelligent terminal optical receiver sensitivity self-operated measuring unit |
| CN108847884A (en) * | 2018-04-03 | 2018-11-20 | 国网福建省电力有限公司电力科学研究院 | Intelligent substation protective device optical power and optical receiver sensitivity method for automatic measurement |
| CN109459614A (en) * | 2018-12-07 | 2019-03-12 | 深圳市鼎阳科技有限公司 | A kind of spectrum analyzer and its method for searching for signal |
Non-Patent Citations (2)
| Title |
|---|
| 王伟斌等: "基于二分法的雷达高度表灵敏度测试方法优化研究", 电子测量与仪器学报, no. 04, pages 28 - 32 * |
| 邓维川等: "光收发模块灵敏度测试方法探讨", 电子测量技术, no. 04, pages 7 - 11 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112433082A (en) * | 2020-10-30 | 2021-03-02 | 国网山东省电力公司青岛供电公司 | Optical fiber voltage measuring system and method |
| CN112433082B (en) * | 2020-10-30 | 2022-09-20 | 国网山东省电力公司青岛供电公司 | Optical fiber voltage measuring system and method |
| CN113078944A (en) * | 2021-03-23 | 2021-07-06 | 国网北京市电力公司 | Device and method for testing single fiber supported by double-fiber optical network port of transformer substation testing equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105049113B (en) | A kind of active light module multichannel automatization test system and method | |
| CN201583609U (en) | Portable type passive intermodulation tester | |
| US7263286B2 (en) | Fast testing system for optical transceiver and testing method thereof | |
| CN101430242B (en) | Apparatus and method used for automatic test of erbium-doped fiber amplifier performance | |
| CN109274422A (en) | A kind of optical module test macro and method | |
| CN111313965A (en) | Intelligent substation optical fiber link testing method and device | |
| CN101183138A (en) | Batch detector methods and apparatus of power amplifier | |
| CN101726664A (en) | Method, device and system for measuring signal phase difference | |
| CN104243025A (en) | High-precision extinction ratio test method and system | |
| CN202713307U (en) | Extinction ratio measurement system for optical communication | |
| CN210867698U (en) | Four-channel optical module parallel test system | |
| CN112491466B (en) | Light intensity modulation radio frequency signal phase consistency measuring device and measuring method | |
| CN210953326U (en) | Relay protection multi-channel optical fiber intelligent tester | |
| CN108390733A (en) | A kind of multi-channel radio frequency power amplifier test system and method | |
| CN112688731A (en) | Multichannel TEC quick temperature change system | |
| CN110058099B (en) | Device and method for automatically and rapidly measuring frequency response of electro-optic modulator | |
| KR100917163B1 (en) | Hand-held multi-wavelength optical analysis system based on wireless for optical network | |
| CN217424710U (en) | Optical cable remote monitoring device at tail end of power optical transmission network | |
| CN208939965U (en) | A kind of optical module test macro | |
| CN202721677U (en) | Multi-channel test device applied to optical transceiver module | |
| CN212572555U (en) | Light intensity modulation radio frequency signal amplitude measuring circuit | |
| CN112152733B (en) | System and method for accurately measuring output power of AM broadcast transmitter | |
| CN111010244B (en) | Wireless sensor testing system and method | |
| CN207603642U (en) | A kind of photoreceiver with forward signal quality inspection device | |
| CN100395525C (en) | Automatic testing apparatus and method for comb type filter spectrum optical module |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |