CN101825667B - Failure detecting equipment of power communication transmission channel, failure detecting system and method - Google Patents
Failure detecting equipment of power communication transmission channel, failure detecting system and method Download PDFInfo
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Abstract
The invention provides failure detecting equipment of a power communication transmission channel, a failure detecting system and a method. The equipment is characterized by comprising a transmitting end synchronous digital transmission device, an interference signal generating device and a receiving end synchronous digital transmission device, wherein the transmitting end synchronous digital transmission device is used for receiving state data transmitted by transmitting end protecting equipment and transmitting the state data into an optical fiber for transmission; the interference signal generating device is used for adding an interference signal into the state data; and the receiving end synchronous digital transmission device is used for receiving the state data transmitted from the optical fiber and transmitting the state data to receiving end protecting equipment for carrying out detecting processing. The embodiment of the invention adds simulating interference into the inward transmitted data of the transmission channel and can detect the performance of a relay protecting device in real time and execute alarm operation in time.
Description
Technical field
The present invention is about communication technical field, particularly about a kind of power communication transmission channel fault test set, fault detection system and method.
Background technology
Development along with the power communication system communication technology; use the route protection of digital channel to begin widespread use; protection mainly comprises longitudinal differential protection, longitudinal distance protection and pilot direction protection; being most widely used of longitudinal differential protection wherein, the advantage such as that longitudinal differential protection has is highly sensitive, principle simple, the protection reliable, be swift in motion.
But; along with a large amount of use of current comparison pilot protection; the digital channel abnormal conditions cause the phenomenon of the incorrect phenomenons such as protective device alarm more and more; existing equipment can not well be tested the performance of protection equipment; as TWM-1 communication error code generator; the shortcoming of this instrument is: can not replace whole communication synchronization transmission system, channel failure type less, passage can not be provided, must be by other passage.Datang Telecom's passage detection platform can not replace whole communication synchronization transmission system, equally must be by other passage.
Summary of the invention
Embodiment of the present invention purpose is to provide a kind of power communication transmission channel fault test set, fault detection system and method, in order to the fault by simulation, the transmission performance of passage is detected.
To achieve these goals, the embodiment of the present invention provides a kind of power communication transmission channel fault test set, described equipment comprises: transmitting terminal synchronous digital transmission device is used for the status data that receiving end/sending end protection equipment is sent, and imports described status data into optical fiber and transmit; Interference signal generation device is used for adding undesired signal at described status data; Receiving end synchronous digital transmission device is used for receiving the described status data from described Optical Fiber Transmission, described status data is transferred to receiving end protection equipment carries out Check processing.
To achieve these goals, the embodiment of the present invention provides a kind of power communication transmission channel fault detection method, and described method comprises: the status data that transmitting terminal protection equipment is sent and the described status data that adds undesired signal send to transmitting terminal synchronous digital transmission device; Receive described status data, and described status data is arrived described receiving end synchronous digital transmission device by Optical Fiber Transmission; Reception is transferred to receiving end protection equipment with described status data and carries out Check processing from the described status data of described Optical Fiber Transmission.
To achieve these goals, the embodiment of the present invention provides a kind of fault detection system, described fault detection system comprises transmitting terminal protection equipment, power communication transmission channel fault test set and receiving end protection equipment, described transmitting terminal protection equipment is used for to described power communication transmission channel fault test set status data; Described power communication transmission channel fault test set is used for receiving described status data, adds undesired signal in described status data, and transmits described status data; Described receiving end protection equipment is used for receiving the described status data that described power communication transmission channel fault test set sends, and calculates the bit error rate, the described bit error rate and definite value is compared, if the described bit error rate greater than described definite value, is carried out alarm operation.
To achieve these goals, the embodiment of the present invention provides a kind of fault detection method, and described method comprises: to described power communication transmission channel fault test set status data; Described power communication transmission channel fault test set adds undesired signal in described status data, transmit described status data; Receive the described status data that described power communication transmission channel fault test set sends, calculate the bit error rate, the described bit error rate and definite value are compared, if the described bit error rate greater than described definite value, is carried out alarm operation.
Useful technique effect of the present invention: by add the fault of simulation in the data of transmission in transmission channel, the performance of detection protection equipment that can be real-time is in time carried out alarm operation.
Description of drawings
Fig. 1 is embodiment of the present invention power communication transmission channel fault test set structural drawing one;
Fig. 2 is embodiment of the present invention power communication transmission channel fault test set structural drawing two;
Fig. 3 is embodiment of the present invention power communication transmission channel fault test set structural drawing three;
Fig. 4 is the process flow diagram of embodiment of the present invention power communication transmission channel fault detection method;
Fig. 5 is the structural drawing of the fault detection system 500 of the embodiment of the present invention;
Fig. 6 is the process flow diagram of embodiment of the present invention fault detection method;
Fig. 7 schematic diagram that to be embodiment of the present invention status data transmit between the transmitting procedure transmitting terminal SDH equipment of SDH and receiving end SDH equipment;
Fig. 8 is the annexation figure of a plurality of PCM equipment of SDH equipment access in embodiment of the present invention data transmission procedure;
Fig. 9 is that the embodiment of the present invention is every the digital signal of 5ms generation and the corresponding relation figure of check code;
Figure 10 is embodiment of the present invention data transmission procedure figure when not having PCM equipment;
Figure 11 is the mapping relations figure of digital signal and check code in embodiment of the present invention protective relaying device;
Figure 12 is the structural representation of embodiment of the present invention receiving end protective relaying device;
Figure 13 is embodiment of the present invention data transmission procedure figure when having PCM equipment;
Figure 14 is the transmitted in both directions schematic diagram of embodiment of the present invention data in transmission channel.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Based on the embodiment in the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
Fig. 1 is embodiment of the present invention power communication transmission channel fault test set structural drawing one.As shown in Figure 1, described power communication transmission channel fault test set 100 comprises: transmitting terminal synchronous digital transmission device 101 is used for the status data that receiving end/sending end protection equipment is sent, and imports described status data into optical fiber and transmit; Interference signal generation device 102 is used for adding undesired signal at described status data; Receiving end synchronous digital transmission device 103 is used for receiving the described status data from described Optical Fiber Transmission, described status data is transferred to receiving end protection equipment carries out Check processing.
As shown in Figure 2, power communication transmission channel fault test set 200 also comprises transmitting terminal pulse code modulation (PCM) device 201 and receiving end pulse code modulation (PCM) device 202.Transmitting terminal pulse code modulation (PCM) device 201, being used for providing bandwidth is the route of 64K, the described status data that receiving end/sending end protection equipment is sent sends to described transmitting terminal synchronous digital transmission device 101 with described status data; Receiving end pulse code modulation (PCM) device 202, being used for providing bandwidth is the route of 64K, receives the described status data that described receiving end synchronous digital transmission device is sent, and described status data is sent to receiving end protection equipment carry out Check processing.Interference signal generation device 102 is used for adding undesired signal before described transmitting terminal pulse code modulation (PCM) device 201 or being used for adding undesired signal after described transmitting terminal pulse code modulation (PCM) device 201.Be to add undesired signal after described transmitting terminal pulse code modulation (PCM) device 201 in Fig. 2, Fig. 3 is embodiment of the present invention power communication transmission channel fault test set 300 structural drawing three, adds undesired signal before described transmitting terminal pulse code modulation (PCM) device 201.
Fig. 4 is the process flow diagram of embodiment of the present invention power communication transmission channel fault detection method.As shown in Figure 4, the method comprises:
Step S401: the status data that transmitting terminal protection equipment is sent and the described status data that adds undesired signal send to transmitting terminal synchronous digital transmission device;
Step S402: receive described status data, and described status data is arrived described receiving end synchronous digital transmission device by Optical Fiber Transmission;
Step S403: receive the described status data from described Optical Fiber Transmission, described status data is transferred to receiving end protection equipment carries out Check processing.
Fig. 5 is the structural drawing of the fault detection system 500 of the embodiment of the present invention, this fault detection system comprises transmitting terminal protection equipment 501, power communication transmission channel fault test set 502 and receiving end protection equipment 503, wherein, transmitting terminal protection equipment 501 is used for to described power communication transmission channel fault test set status data; Power communication transmission channel fault test set 502 is used for receiving described status data, adds undesired signal in described status data, and transmits described status data; Receiving end protection equipment 503 is used for receiving the described status data that described power communication transmission channel fault test set sends, and calculates the bit error rate, the described bit error rate and definite value is compared, if the described bit error rate greater than described definite value, is carried out alarm operation.
The process flow diagram of Fig. 6 embodiment of the present invention fault detection method, this fault detection method comprises:
Step 601: to described power communication transmission channel fault test set status data;
Step 602: described power communication transmission channel fault test set adds undesired signal in described status data, transmit described status data;
Step 603: receive the described status data that described power communication transmission channel fault test set sends, calculate the bit error rate, the described bit error rate and definite value are compared, if the described bit error rate greater than described definite value, is carried out alarm operation.
In the embodiment of the present invention, transmitting terminal synchronous digital transmission device and receiving end synchronous digital transmission device are synchronous digital transmission equipment (SDH equipment), for example can be for being permitted the CGCS-1000 type SDH equipment that continues; Transmitting terminal pulse code modulation (PCM) device and receiving end pulse code modulation (PCM) device are pulse code modulation (PCM) (PCM) equipment, and PCM equipment for example can be the PCM of Nokia equipment, the PCM of Sagem equipment and the PCM equipment of being permitted to continue; Transmitting terminal protection equipment and receiving end protection equipment are protective relaying device; for example can be RCS931 longitudinal differential protection equipment and CSC103 longitudinal differential protection equipment, the status data that transmitting terminal protection equipment sends is running state data or the alarm data of transmitting terminal protection equipment.
Protective relaying device, channel switching device, PCM equipment and SDH equipment have consisted of laboratory both-end power communication synchronous transmission system; SDH equipment can provide the route of 2M in transmitting procedure; as shown in Figure 7, the schematic diagram that transmits between the transmitting procedure transmitting terminal SDH equipment of SDH equipment and receiving end SDH equipment for embodiment of the present invention status data.Laboratory both-end power communication synchronous transmission system can be divided into many SDH transmission channels, if in the both-end power communication synchronous transmission system of laboratory, the flow of signal transmission is 2nM, can access 2n to transmitting terminal SDH equipment and receiving end SDH equipment.Pass through optical signal transmission fiber between transmitting terminal SDH equipment and receiving end SDH equipment; transmitting terminal SDH equipment 702 receives the electric signal of sending from transmitting terminal protective relaying device 701; photoelectric conversion interface 704 through transmitting terminal SDH equipment 702 is converted to light signal with electric signal; then light signal is converted to electric signal; by Optical Fiber Transmission to receiving end SDH equipment; receiving end SDH equipment receiving optical signals; and by the photoelectric conversion device 704 of receiving end SDH equipment, light signal is converted to electric signal, then be transferred to receiving end protective relaying device 705.
PCM equipment can provide the route of 64K, so one the SDH transmission channel can be divided into (2 * 1024/64)=32 pair PCM equipment, as shown in Figure 8, article one, the SDH transmission channel can connect 32 transmitting terminal PCM equipment 801 before transmitting terminal SDH equipment, can connect 32 receiving end PCM equipment 802 after receiving end SDH equipment.
Signal generation apparatus for example can be error code generator or channel-detecting device, and the error code generator can be the TWM-1 error code generator of communicating by letter, and channel-detecting device can be Datang Telecom's passage detection platform.TWM-1 communication error code generator is mainly used to produce error code; Datang Telecom's passage detection platform can produce passage switching, communication channel delay variation, error code, interruption, LOF alarm, various undesired signals such as ring, clock frequency variation certainly.
When not having PCM equipment in power communication transmission channel fault test set, utilize the transmission channel that is formed by transmitting terminal SDH equipment, receiving end SDH equipment and signal generation apparatus to measure the performance of the protective relaying device at two ends.The below's performance how the error code generator tests the two ends protective relaying device as example explanation of communicating by letter take signal generation apparatus as TWM-1.
The performance of protective relaying device refers to that it adds the undesired signal ability to bear to the signal that transmits in passage.The transmitting terminal protective relaying device produces the status signal of its running status of reflection or alarm immediately; the status signal process is processed the generating digital signal; as 01101100; and the corresponding check code that generates this digital signal; the check code that each digital signal is corresponding unique, for example the check code of digital signaling zero 1101100 is set as ABCDEF.The transmitting terminal protective relaying device sends instant digital signal and corresponding check code thereof every a time interval to transmitting terminal SDH equipment, supposes that the time interval is 5ms, as shown in Figure 9, produces a digital signal every 5ms, and generates corresponding check code.
The transmitting terminal protective relaying device is converted to digital signal every the status signal that 5ms produces, and generates check code corresponding to this digital signal, and digital signal is processed into packet.For example the transmitting terminal protective relaying device is converted to digital signaling zero 0110101 with the alarm signal in status signal at a time; generate check code BADCFE; 00110101 and BADCFE be packaged into packet 1 (00110101; BADCFE) be alarm data; then with packet 1 (00110101, BADCFE) to transmitting terminal SDH equipment 802 transmission.
data transmission procedure as shown in figure 10, the packet 1 (00110101 that sends from transmitting terminal protective relaying device 1001, BADCFE) transmit with the light signal form, and optic electric interface (not shown) of existence between transmitting terminal protective relaying device 1001 and transmitting terminal SDH equipment 1002, be used for utilizing photoelectric conversion device at this optic electric interface, transmitting terminal protective relaying device 1001 to be converted to electric signal from the light signal of Optical Fiber Transmission, then send packet 1 (00110101 through concentric cable to transmitting terminal SDH equipment 1002, BADCFE), at packet 1 (00110101, BADCFE) in transmitting terminal SDH transmitting procedure, TWM-1 communication error code generator 1003 is at packet 1 (00110101, BADCFE) add undesired signal in, packet 1 (00110101, BADCFE) become packet 1 (00110100, BADCFE).Transmitting terminal SDH equipment 1002 will add undesired signal packet 1 (00110100, be BADCFE) form of light signal by photoelectric conversion interface from the formal transformation of electric signal, arrive receiving end SDH equipment 1004 by Optical Fiber Transmission.Receiving end SDH equipment receive packet 1 (00110100, BADCFE) after, after being the form of electric signal by photoelectric conversion interface from the formal transformation of light signal, send to receiving end protective relaying device 1005.Also there is an optic electric interface (not shown) between receiving end protective relaying device and receiving end SDH equipment 1004; be used for utilizing photoelectric conversion device at this optic electric interface, receiving end SDH equipment 1004 to be converted to light signal from the electric signal that concentric cable transmits; then pass through optical fiber with 1 (00110100, BADCFE) be transferred to receiving end protective relaying device 1005 and detect.
Receiving end protective relaying device 1005 and transmitting terminal protective relaying device 1001 have a mapping relations table, and as shown in figure 11, the check code that identical digital signal is corresponding unique only provides the corresponding relation of part check code and digital signal in figure.
As shown in figure 12; receiving end protective relaying device 1005 comprises computing module 1201 (calculation element) and Check processing module 1202 (Check processing device); the mapping relations that computing module 1201 is used for according to Figure 11 digital signal and check code; in mapping table, specific practice is for digital signal in the packet 1 that receives of comparison and check code:
Check packet 1 (00110100, BADCFE) the corresponding digital signal in Figure 11 of the check code BADCFE in is 11001101, and the digital signal in packet 1 is 00110100, can know in packet 1 to have been added undesired signal by TWM-1 communication error code generator, 1201 pairs of packets that transmit every 5ms of computing module carry out same detection.TWM-1 communication error code generator only adds undesired signal to partial data, TWM-1 communication error code generator can be set add at set intervals undesired signal one time, for example can set every 40ms and add undesired signal one time.whether disturbed signal is changed into error code to digital signal in computing module 1201 each packet of detection, calculate in continuous 100 packets and be added into the quantity that undesired signal is changed into the packet of error code, suppose to have calculated the coated undesired signal of 8 data and change into error code, 92 packets do not have disturbed signal to change into error code, the bit error rate is 8%, Check processing module 1202 compares with the permission bit error rate of protective relaying device 8%, if the bit error rate that relay protection device allows is 7% (bit error rate of different protective relaying devices is different), illustrate that this protective relaying device can not bear 8% the bit error rate, Check processing module 1202 will be carried out alarm operation.If the bit error rate of relay protection device is 10%, illustrate that this protective relaying device can bear 8% the bit error rate, Check processing module 1202 is not carried out alarm operation.
The above has introduced when not having PCM equipment; how to detect the transmission performance of relay protection device; when having PCM equipment; data transmission with do not have the PCM equipment class seemingly; different is when accessing transmitting terminal PCM equipment before transmitting terminal SDH equipment; can add undesired signal before transmitting terminal PCM equipment, also can add undesired signal after transmitting terminal PCM equipment.
Data transmission procedure as shown in figure 13, added transmitting terminal PCM equipment 1301 before transmitting terminal SDH equipment, add receiving end PCM to establish after receiving end SDH 1302 standby, describe as example to add TWM-1 communication error code generator to produce undesired signal before transmitting terminal SDH equipment.
as shown in figure 13, the packet 1 (00110101 that sends from transmitting terminal protective relaying device 1001, BADCFE) transmit with the light signal form, and optic electric interface (not shown) of existence between transmitting terminal protective relaying device and transmitting terminal PCM equipment, be used for utilizing photoelectric conversion device at this optic electric interface, transmitting terminal protective relaying device 1001 to be converted to electric signal from the light signal of Optical Fiber Transmission, then transmit to transmitting terminal PCM equipment 1301 through Shielded Twisted Pair, transmitting terminal PCM equipment 1301 receive data bags 1 (00110101, BADCFE), and transmit to transmitting terminal SDH.At packet 1 (00110101, BADCFE) in transmitting terminal SDH transmitting procedure, TWM-1 communication error code generator 1003 is at packet 1 (00110101, BADCFE) add undesired signal in, packet 1 (00110101, BADCFE) become packet 1 (00110100, BADCFE).Transmitting terminal SDH equipment 1002 will add undesired signal packet 1 (00110100, be BADCFE) form of light signal by photoelectric conversion interface from the formal transformation of electric signal, arrive receiving end SDH equipment 1004 by Optical Fiber Transmission.Receiving end SDH equipment 1004 receives packet 1 (00110100; BADCFE) after; after being the form of electric signal by photoelectric conversion interface from the formal transformation of light signal; to 1302 transmission of receiving end PCM equipment; 1302 transmission of receiving end PCM equipment receive packet 1 (00110100; BADCFE) after, send to receiving end protective relaying device 1005.Also there is an optic electric interface (not shown) between receiving end protective relaying device 1005 and receiving end PCM equipment 1302; be used for utilizing photoelectric conversion device at this optic electric interface, the electric signal that receiving end PCM equipment 1302 transmits from Shielded Twisted Pair to be converted to light signal; then pass through optical fiber with packet 1 (00110100, BADCFE) be transferred to receiving end protective relaying device 1005.
Receiving end protective relaying device 1005 and transmitting terminal protective relaying device 1001 have a mapping relations table, and as shown in figure 11, the check code that identical digital signal is corresponding unique only provides the corresponding relation of part check code and digital signal in figure.
As shown in figure 12; receiving end protective relaying device 1005 comprises computing module 1001 and Check processing module 1202; the mapping relations that computing module 1201 is used for according to Figure 11 digital signal and check code; in mapping table, specific practice is for digital signal in the packet 1 that receives of comparison and check code:
Check packet 1 (00110100, BADCFE) the corresponding digital signal in Figure 11 of the check code BADCFE in is 11001101, and the digital signal in packet 1 is 00110100, can know in packet 1 to have been added undesired signal by TWM-1 communication error code generator, 1201 pairs of packets that transmit every 5ms of computing module carry out same detection.TWM-1 communication error code generator only adds undesired signal to partial data, TWM-1 communication error code generator can be set add at set intervals undesired signal one time, for example can set every 40ms and add undesired signal one time.whether disturbed signal is changed into error code to digital signal in computing module 1201 each packet of detection, calculate the quantity that is added into the packet of undesired signal in continuous 100 packets, suppose to have calculated the coated undesired signal of 8 data and change into error code, 92 packets do not have disturbed signal to change into error code, the bit error rate is 8%, Check processing module 1202 compares with the permission bit error rate of protective relaying device 8%, if the bit error rate that relay protection device allows is 7%, illustrate that this protective relaying device can not bear 8% the bit error rate, Check processing module 1202 will be carried out alarm operation.If the bit error rate of relay protection device is 10%, illustrate that this protective relaying device can bear 8% the bit error rate, Check processing module 1202 is not carried out alarm operation.
Communication transmission passage between transmitting terminal protective relaying device and receiving end protective relaying device is duplex channel, and receiving end and transmitting terminal are mutual.When communication was initiated from the receiving end protective relaying device, the receiving end protective relaying device was carried out the function of transmitting terminal protective relaying device just as the transmitting terminal protective relaying device, and the transmitting terminal protective relaying device is carried out the function that receives protective relaying device.In like manner, receiving end SDH equipment also can be used as transmitting terminal SDH equipment, and receiving end PCM equipment also can be used as transmitting terminal PCM equipment, as shown in figure 14 (PCM equipment is not shown).
The embodiment of the present invention only produces error code with TWM-1 communication error code generator and changes the data of transmitting in passage, also but Datang Telecom's passage detection platform adds undesired signal in the data of transmission, change original data, such as producing passage switching, communication channel delay variation, error code, interruption, LOF alarm, various undesired signals such as ring, clock frequency variation certainly, the purpose of these undesired signals is all the data that change transmission, is not giving unnecessary details at this.
The protective relaying device of the embodiment of the present invention can be the protective device of different manufacturers production; be for example RCS931 longitudinal differential protection equipment and CSC103 longitudinal differential protection equipment; the bit error rate that different protective relaying devices bears is different; there is the definite value of a bit error rate in each protective relaying device; in case the bit error rate of transmitting in passage is higher than the definite value of this device bit error rate; protective relaying device will carry out alarm operation, can effectively detect the performance of protective relaying device.
Useful technique effect of the present invention: by add the signal of simulation in the data of transmission in transmission channel, the performance of detection protective relaying device that can be real-time is in time carried out alarm operation.
Claims (12)
1. a power communication transmission channel fault test set, is characterized in that, described equipment comprises:
Transmitting terminal synchronous digital transmission device is used for the status data that receiving end/sending end protection equipment is sent, and imports described status data into optical fiber and transmit;
Interference signal generation device is used for adding undesired signal at described status data;
Receiving end synchronous digital transmission device is used for receiving the described status data from described Optical Fiber Transmission, described status data is transferred to receiving end protection equipment carries out Check processing;
Wherein, Check processing comprises: will add the bit error rate that undesired signal produces to compare with allowing the bit error rate, if the described bit error rate higher than the described permission bit error rate, is carried out alarm operation; If the described bit error rate is not carried out alarm operation lower than the described permission bit error rate, described undesired signal comprises: passage switching, communication channel delay variation, error code, interruption, LOF alarm, ring, clock frequency variation certainly.
2. equipment as claimed in claim 1, is characterized in that, described equipment can also comprise:
Transmitting terminal pulse code modulation (PCM) device, being used for providing bandwidth is the route of 64K, the described status data that receiving end/sending end protection equipment is sent sends to described transmitting terminal synchronous digital transmission device with described status data;
Receiving end pulse code modulation (PCM) device, being used for providing bandwidth is the route of 64K, receives the described status data that described receiving end synchronous digital transmission device is sent, and described status data is sent to receiving end protection equipment carry out Check processing.
3. equipment as claimed in claim 2, is characterized in that, described interference signal generation device is used for adding undesired signal before described transmitting terminal pulse code modulation (PCM) device or being used for adding undesired signal after described transmitting terminal pulse code modulation (PCM) device.
4. equipment as claimed in claim 1, is characterized in that, described status data is running state data or the alarm data of transmitting terminal protection equipment.
5. equipment as claimed in claim 1, is characterized in that, described interference signal generation device is error code generator or channel-detecting device.
6. equipment as claimed in claim 1, is characterized in that, described transmitting terminal synchronous digital transmission device and described receiving end synchronous digital transmission device are used for providing the route of 2M.
7. a power communication transmission channel fault detection method, is characterized in that, described method comprises:
The status data that transmitting terminal protection equipment is sent and the described status data that adds undesired signal send to transmitting terminal synchronous digital transmission device;
Receive described status data, and described status data is arrived receiving end synchronous digital transmission device by Optical Fiber Transmission;
Reception is transferred to receiving end protection equipment with described status data and carries out Check processing from the described status data of described Optical Fiber Transmission;
Wherein, Check processing comprises: will add the bit error rate that undesired signal produces to compare with allowing the bit error rate, if the described bit error rate higher than the described permission bit error rate, is carried out alarm operation; If the described bit error rate is not carried out alarm operation lower than the described permission bit error rate, described undesired signal comprises: passage switching, communication channel delay variation, error code, interruption, LOF alarm, ring, clock frequency variation certainly.
8. method as claimed in claim 7, is characterized in that, described method also comprises:
Before the status data that receiving end/sending end protection equipment is sent, it is the route of 64K that transmitting terminal pulse code modulation (PCM) device provides bandwidth;
Reception is after the described status data that optical fiber is sent, and it is the route of 64K that receiving end pulse code modulation (PCM) device provides bandwidth, then described status data is sent to receiving end protection equipment and carries out Check processing.
9. fault detection system, described fault detection system comprise transmitting terminal protection equipment, power communication transmission channel fault test set and receiving end protection equipment, it is characterized in that,
Described transmitting terminal protection equipment is used for to described power communication transmission channel fault test set status data;
Described power communication transmission channel fault test set is used for receiving described status data, adds undesired signal in described status data, and transmits described status data;
Described receiving end protection equipment is used for receiving the described status data that described power communication transmission channel fault test set sends, and calculates the bit error rate, the described bit error rate and definite value is compared, if the described bit error rate greater than described definite value, is carried out alarm operation;
Wherein, described undesired signal comprises: passage switching, communication channel delay variation, error code, interruption, LOF alarm, ring, clock frequency variation certainly.
10. fault detection system as claimed in claim 9, is characterized in that, the described bit error rate refers to add the status data of undesired signal and the ratio of all status datas.
11. fault detection system as claimed in claim 10 is characterized in that, described receiving end protection equipment comprises:
Calculation element: be used for calculating the described bit error rate;
The Check processing device is if the described bit error rate greater than described definite value, is carried out alarm operation.
12. a fault detection method is characterized in that, described fault detection method comprises:
To power communication transmission channel fault test set status data;
Described power communication transmission channel fault test set adds undesired signal in described status data, transmit described status data;
Receive the described status data that described power communication transmission channel fault test set sends, calculate the bit error rate, the described bit error rate and definite value are compared, if the described bit error rate greater than described definite value, is carried out alarm operation;
Wherein, described undesired signal comprises: passage switching, communication channel delay variation, error code, interruption, LOF alarm, ring, clock frequency variation certainly.
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| CN102184656B (en) * | 2011-05-10 | 2012-12-26 | 安徽省电力科学研究院 | Power frequency parameter simulation system for power transmission line and control method of power frequency parameter simulation system |
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| CN103647677B (en) * | 2013-09-24 | 2017-02-08 | 广东电网公司佛山供电局 | Power communication network state detection method |
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