CN201369730Y - Relay protective channel fault detection equipment - Google Patents
Relay protective channel fault detection equipment Download PDFInfo
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- CN201369730Y CN201369730Y CNU2009201057548U CN200920105754U CN201369730Y CN 201369730 Y CN201369730 Y CN 201369730Y CN U2009201057548 U CNU2009201057548 U CN U2009201057548U CN 200920105754 U CN200920105754 U CN 200920105754U CN 201369730 Y CN201369730 Y CN 201369730Y
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Abstract
The utility model provides a relay protective channel fault detection equipment which comprises a digital simulator, a sending end protection device, a sending end synchronization digital transmission device, an interference signal generator, a receiving end synchronization digital transmission device and a receiving end protection device; the digital simulator is connected with the sending end protection device, the sending end protection device is connected with the sending end synchronization digital transmission device, the sending end synchronization digital transmission device is connected with the receiving end synchronization digital transmission device through optical fiber, the interference signal generator is coupled between the sending end protection device and the sending end synchronization digital transmission device, the receiving end synchronization digital transmission device is connected with the receiving end protection device; simulative fault and signal can be input to transmission channel for detecting transmission performance; when protection exception occurs in power grid, the relay protective channel fault detection equipment can be used for fault simulation and finding fault cause.
Description
Technical field
The utility model is about communication transmission technology, particularly about a kind of relay protection channel fault test set.
Background technology
Along with the power communication system development of Communication Technique; use the route protection of digital channel to begin extensive use; protection mainly comprises longitudinal differential protection, longitudinal distance protection and vertical connection direction protection; being most widely used of longitudinal differential protection wherein, 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 vertical connection current differential protection; the digital channel abnormal conditions cause the phenomenon of incorrect behaviors such as protective device alarm more and more; existing facilities fail is well tested signal; the TWM-1 communication error code generator of prosperous Nantong letter equipment Co., Ltd exploitation so continues; the shortcoming of this instrument is: can not replace whole communication synchronization transmission system; the channel failure type is less; passage can not be provided; must can not carry out of the combine analog test of all kinds of stock index of Circuits System by other passage in digital channel abnormal conditions and transient process.Datang Telecom's passage detection platform can not replace whole communication synchronization transmission system, must can not carry out the combine analog test of all kinds of stock index of Circuits System in digital channel abnormal conditions and transient process by other passage equally.
The utility model content
The utility model embodiment purpose is to provide a kind of power communication transmission channel fault test set, in order to detect by the transmission performance of simulated failure to passage.
To achieve these goals, the utility model provides a kind of relay protection digital channel fault test set, described equipment comprises: the Digital Simulation device, the transmitting terminal protective device, transmitting terminal synchronous digital transmitting device, interference signal generation device, receiving terminal synchronous digital transmitting device and receiving terminal protective device, described Digital Simulation device is connected with described transmitting terminal protective device, described transmitting terminal protective device is connected with described transmitting terminal synchronous digital transmitting device, described transmitting terminal synchronous digital transmitting device is connected by optical fiber with described receiving terminal synchronous digital transmitting device, described interference signal generation device is coupled between described transmitting terminal protective device and the described transmitting terminal synchronous digital transmitting device, and described receiving terminal synchronous digital transmitting device is connected with described receiving terminal protective device; Described Digital Simulation device produces voltage signal, current signal and the contact point signal of reflection operation of power networks state; Described transmitting terminal protective device produces status signal, and transmission comprises the transmission signals of described status signal, described voltage signal, current signal and contact point signal; Described transmitting terminal synchronous digital transmitting device receives described transmission signals, and imports described transmission signals into optical fiber and transmit; Described interference signal generation device adds interference signal in described transmission signals; Described receiving terminal synchronous digital transmitting device receives the described transmission signals from described Optical Fiber Transmission, and transmits described transmission signals; Described receiving terminal protective device receives the described transmission signals of described receiving terminal synchronous digital transmitting device transmission; and calculate the quantity of normal signal in the described transmission signals; the quantity and the definite value of described normal signal are compared; if the quantity of described normal signal less than described definite value, is carried out alarm, tripping operation or passage handover operation.
Useful technique effect of the present utility model: the utility model embodiment adds the fault of simulation in transmission channel disturbs; detected transmission performance that can be real-time; when generation in the actual electric network causes protection exception or incorrect operation owing to access issues; can be convenient to search accident cause utilizing this relay protection digital channel fault detection system to carry out fault simulation.
Description of drawings
Fig. 1 is the structural representation one of the utility model embodiment power transmitting device;
Fig. 2 is the utility model embodiment power transmitting device added interference signal in transmission signals before described transmitting terminal pulse code modulation device a structure chart;
Fig. 3 is the utility model embodiment power transmitting device adds interference signal in transmission signals after described transmitting terminal pulse code modulation device a structure chart;
Fig. 4 is the structure chart of the utility model embodiment receiving terminal protective device;
Fig. 5 is the flow chart of the utility model embodiment relay protection digital channel fault detection method;
The schematic diagram that Fig. 6 transmits between the transmission course transmitting terminal SDH equipment of SDH equipment and receiving terminal SDH equipment for the utility model embodiment transmission signals;
As Fig. 7 is the utility model embodiment SDH equipment and a plurality of PCM equipment connection diagram;
Fig. 8 is that the embodiment of the invention is every the digital signal of 3ms generation and the corresponding relation figure of check code;
Data transmission procedure figure when there is not PCM equipment in Fig. 9 for the embodiment of the invention;
Figure 10 is the mapping relations figure of digital signal and check code in the embodiment of the invention protective relaying device;
Figure 11 is the structural representation of embodiment of the invention receiving terminal protective relaying device;
Data transmission procedure figure when there is PCM equipment in Figure 12 for the embodiment of the invention;
Figure 13 is the transmitted in both directions schematic diagrames of embodiment of the invention data in transmission channel
Embodiment
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.
As shown in Figure 1; the relay protection digital channel fault test set comprises: described equipment comprises: Digital Simulation device 101; transmitting terminal protective device 102; transmitting terminal synchronous digital transmitting device 103; interference signal generation device 104; receiving terminal synchronous digital transmitting device 105 and receiving terminal protective device 106; described Digital Simulation device 101 is connected with described transmitting terminal protective device 102; described transmitting terminal protective device 102 is connected 103 with described transmitting terminal synchronous digital transmitting device; described transmitting terminal synchronous digital transmitting device 103 and described receiving terminal synchronous digital transmitting device 105 are connected by optical fiber, and described transmitting terminal synchronous digital transmitting device and described receiving terminal synchronous digital transmitting device are on the passage of 2M route.Described interference signal generation device 104 is coupled between described transmitting terminal protective device 102 and the described transmitting terminal synchronous digital transmitting device 103, and described receiving terminal synchronous digital transmitting device 105 is connected with described receiving terminal protective device 106; Described Digital Simulation device 101 produces voltage signal, current signal and the contact point signal of reflection operation of power networks state; Described transmitting terminal protective device 102 produces status signal, and transmission comprises the transmission signals of described status signal, described voltage signal, current signal and contact point signal; Described transmitting terminal synchronous digital transmitting device 103 receives described transmission signals, and imports described transmission signals into optical fiber and transmit; Described interference signal generation device 104 adds interference signal in described transmission signals; The described transmission signals that described receiving terminal synchronous digital transmitting device 105 receives from described Optical Fiber Transmission, and transmit described transmission signals; Described receiving terminal protective device 106 receives the described transmission signals of described receiving terminal synchronous digital transmitting device 105 transmission; and calculate that normal signal is the transmission signals that does not add interference signal in the described transmission signals) quantity (; the quantity and the definite value of described normal signal are compared; if the quantity of described normal signal less than described definite value, is carried out alarm, tripping operation or passage handover operation.Described receiving terminal protective device 106 comprises: computing unit and detection processing unit, and described computing unit is connected with described detection processing unit; Described computing unit calculates the quantity of normal signal in the described transmission signals; Described detection processing unit during less than described definite value, is carried out alarm, tripping operation and passage handover operation in the quantity of described normal signal.
As shown in Figure 2; the relay protection digital channel fault test set for example can also comprise: signal amplifying apparatus 201, waveform analysis device 202, transmitting terminal pulse code modulation device 203 and receiving terminal pulse code modulation device 204; described signal amplifying apparatus 201 is connected between described transmitting terminal protective device 102 and the described Digital Simulation device 101, amplifies described voltage signal and current signal.Described waveform analysis device 202 is connected between described signal amplifying apparatus 201 and the described transmitting terminal protective device 102, writes down and analyze described status signal, described voltage signal, current signal and contact point signal.Described transmitting terminal pulse code modulation device 203 is connected between described transmitting terminal protective device 102 and the described transmitting terminal synchronous digital transmitting device 103, and described receiving terminal pulse code modulation device 204 is connected between described receiving terminal protective device 106 and the described receiving terminal synchronous digital transmitting device 105; It is the route of 64K that described transmitting terminal pulse code modulation device 203 provides bandwidth, and the described transmission signals that receiving end/sending end protective device 102 is sent sends to described transmitting terminal synchronous digital transmitting device 103 with described transmission signals; It is the route of 64K that described receiving terminal pulse code modulation device 204 provides bandwidth, receives the described transmission signals that described receiving terminal synchronous digital transmitting device 105 is sent, and described transmission signals is sent to receiving terminal protective device 106 detect processing.
Described interference signal generation device is coupled between described transmitting terminal protective device and the described transmitting terminal pulse code modulation device or is coupled between described transmitting terminal synchronous digital transmitting device and the described transmitting terminal pulse code modulation device.As shown in Figure 2, interference signal generation device 104 is used for adding interference signal at transmission signals before described transmitting terminal pulse code modulation device 203, perhaps as shown in Figure 3, after described transmitting terminal pulse code modulation device 203, in transmission signals, add interference signal.
In another preferred embodiment, as shown in Figure 4, receiving terminal protective device 106 comprises: computing unit 401: the quantity of calculating normal signal in the described transmission signals; Detect processing unit 402, with the quantity and the definite value comparison of described normal signal, if the quantity of described normal signal less than described definite value, is carried out alarm, tripping operation or passage handover operation.
Transmitting terminal synchronous digital transmitting device and receiving terminal synchronous digital transmitting device are used to provide the route of 2M.Voltage signal, current signal are analog quantity, and contact point signal is a switching value, the disconnection and the on-state of expression contact.
Interference signal generation device 104 can for example be error code generator or passage checkout gear.The error code generator is mainly used to produce bit error signal; The passage checkout gear can produce passage switching, communication channel delay variation, error code, interruption, LOF alarm, various abnormal conditions such as ring, clock frequency variation certainly.
Fig. 5 is the flow chart of the utility model embodiment relay protection digital channel fault detection method, and described step comprises:
Step S501: voltage signal, current signal and the contact point signal of the reflection operation of power networks state that the Digital Simulation device is produced send to the transmitting terminal protective device;
Step S502: described transmitting terminal protective device receives described voltage signal, current signal and contact point signal, and transmission comprises the transmission signals of oneself state signal and described voltage signal, current signal and contact point signal;
Step S503: transmission signals that the transmitting terminal protective device is sent and the described transmission signals that adds interference signal send to transmitting terminal synchronous digital transmitting device;
Step S504: receive described transmission signals, and with described transmission signals from Optical Fiber Transmission to receiving terminal synchronous digital transmitting device;
Step S505: receive described transmission signals, and described transmission signals is transferred to the receiving terminal protective device from Optical Fiber Transmission;
Step S506: receive described transmission signals, and calculate the quantity of normal signal in the described status signal, with the quantity and the definite value comparison of described normal signal, if the quantity of described normal signal less than described definite value, is carried out alarm, tripping operation or passage handover operation.
Among the utility model embodiment, Digital Simulation device 101 for example can be RTDS real-timedigital simulation system, but the transient behavior of the electro-magnetic transient of RTDS real-timedigital simulation system real-time simulation Circuits System, electromechanical transient and long-term dynamics behavior cable system, be used for the Digital Simulation of various operating conditions of electrical network and fault, as analog quantity (voltage signal) and switching value (contact point signal).
The waveform analysis device is the DF1024 waveform analysis device, is made up of DF1024 wave tracer, software kit and microcomputer.The DF1024 wave tracer is mainly finished the collection to simulation, digital input signals, and metadata cache and various triggering mode are judged.Software kit runs on the Windows operating system of microcomputer, mainly finish operation control to the DF1024 wave tracer, the demonstration of real-time measuring data, analysis and storage, and the demonstration of waveform, editor and analysis, mainly comprise waveform recording analysis, real-time tracking and three major parts of characteristic curve analysis.The DF1024 wave tracer links to each other with microcomputer by spp, and a microcomputer can be controlled four DF1024 wave tracers simultaneously.In the relay protection digital channel fault detection system, the DF1024 wave tracer can be judged the action protection performance of detected two ends protective device.
Transmitting terminal synchronous digital transmitting device and receiving terminal synchronous digital transmitting 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 signal pulse code modulation device and receiving terminal pulse code modulation device are pulse code modulation (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 terminal protection equipment are protective relaying device, for example can be RCS931 longitudinal differential protection equipment and CSC103 longitudinal differential protection equipment.
Protective relaying device, channel switching device, PCM equipment and SDH equipment have constituted laboratory both-end power communication synchronous transmission system; SDH equipment can provide the route of 2M in transmission course; as shown in Figure 6, the schematic diagram that between the transmission course transmitting terminal SDH equipment of SDH equipment and receiving terminal SDH equipment, transmits for the utility model embodiment transmission signals.Laboratory both-end power communication synchronous transmission system can be divided into many SDH transmission channels, if the flow of signal transmission is 2nM in the both-end power communication synchronous transmission system of laboratory, then can insert 2n to transmitting terminal SDH equipment and receiving terminal SDH equipment.Pass through optical signal transmission fiber between transmitting terminal SDH equipment and the receiving terminal SDH equipment; transmitting terminal SDH equipment 602 receives the signal of telecommunication of sending from transmitting terminal protective relaying device 601; opto-electronic conversion interface 604 through transmitting terminal SDH equipment 602 is a light signal with electrical signal conversion; then light signal is converted to the signal of telecommunication; give receiving terminal SDH equipment 603 by Optical Fiber Transmission; receiving terminal SDH equipment 603 receiving optical signals; and the photoelectric conversion device by receiving terminal SDH equipment 603 604 is converted to the signal of telecommunication with light signal, is transferred to the receiving terminal protective relaying device then.
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 7, article one, the SDH transmission channel can connect 32 transmitting terminal PCM equipment 701 before transmitting terminal SDH equipment, can connect 32 receiving terminal PCM equipment 702 after receiving terminal SDH equipment.
Signal generation apparatus for example can be TWM-1 communicate by letter error code generator or 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 interference signals such as ring, clock frequency variation certainly.
Whether exist two kinds of situations of PCM equipment to illustrate respectively how power communication transmission channel fault test set measures the performance of protective relaying device below in the branch power communication transmission channel fault test set.
When not having PCM equipment in the power communication transmission channel fault test set, utilize the transmission channel of forming by transmitting terminal SDH equipment, receiving terminal SDH equipment and signal generation apparatus to measure the performance of the protective relaying device at two ends.Be that TWM-1 communication error code generator is the performance how the example explanation tests the two ends protective relaying device below with the signal generation apparatus.
Digital Simulation System can produce analog signals, as voltage signal and current signal, also can produce switching value, and as contact point signal, expression is the switching signal of contact.Be RTDS real-timedigital simulation system below with the Digital Simulation System, the signal that RTDS real-timedigital simulation system produces is that current signal is that example specifies embodiment of the present utility model.
RTDS real-timedigital simulation system produces the current signal of reflection operation of power networks state, and the signal strength signal intensity of this current signal I1 is very little, and need carry out signal by power amplifier and amplify, be that example describes with PA60 type power amplifier here.The every current effective value of output mutually of PA60 type power amplifier can reach 200A.
To be sent to the transmitting terminal protective relaying device through the current signal I1 after the amplification of PA60 type power amplifier, be used to detect the performance of protective relaying device.The performance of protective relaying device is meant that it adds the interference signal ability to bear to the signal that transmits in the passage.The transmitting terminal protective relaying device produces its ruuning situation of reflection or alarm status signal immediately, is example with alarm status signal S1 here.The transmitting terminal protective relaying device is converted to digital signal as 01101100 together with alarm status signal S1 and current signal I1; and to should digital signaling zero 1101100 check codes that generate these digital signals; the check code that each digital signal is corresponding unique, for example the check code of digital signaling zero 1101100 is set at ABCDEF.The transmitting terminal protective relaying device sends instant digital signal and corresponding check sign indicating number thereof every a time interval to transmitting terminal SDH equipment, supposes that the time interval is 3ms, as shown in Figure 8, produces a digital signal every 3ms, and generates the corresponding check sign indicating number.
The transmitting terminal protective relaying device is converted to digital signal together every alarm signal and the current signal that 3ms produces, and generates this digital signal corresponding check sign indicating number.For example the transmitting terminal protective relaying device is converted to digital signaling zero 0110101 with at a time alarm signal and current signal; generate check code BADCEF; 00110101 and BADCEF be packaged into packet 1 (00110101; BADCEF); then with packet 1 (00110101, BADCEF) to transmitting terminal SDH equipment 702 transmission.
Data transmission procedure as shown in Figure 9; the little current signal I1 that RTDS real-timedigital simulation system 907 produces is enlarged into big current signal I1 through PA60 type power amplifier 908; be transferred to transmitting terminal protective relaying device 901 then; received current signal I1; status signal (being assumed to alarm signal) that produces this moment and the current signal I1 that receives are generated digital signaling zero 0110101; and generation corresponding check sign indicating number BADCEF; digital signaling zero 0110101 and check code BADCEF are packaged into packet 1, send to transmitting terminal SDH equipment 902 then.
The packet 1 (00110101 that transmitting terminal protective relaying device 901 sends; BADCEF) transmit with the light signal form; and the transmission line between transmitting terminal protective relaying device and the transmitting terminal SDH equipment is a coaxial cable; so send packet 1 (00110101 to transmitting terminal SDH equipment 902 at transmitting terminal protective relaying device 901; BADCEF) before; to the light signal dress be changed to the signal of telecommunication by photoelectricity converter device 906; then to 902 transmission of transmitting terminal SDH equipment; at packet 1 (00110101; BADCEF) in transmitting terminal SDH equipment 902 transmission courses; communicate by letter error code generator 903 at packet 1 (00110101 with the TWM-1 of transmitting terminal SDH equipment 902 couplings; BADCEF) add interference signal in; packet 1 (00110101, BADCEF) become packet 1 (00110100, BADCEF).Transmitting terminal SDH equipment 902 will add interference signal packet 1 (00110100, be the form of light signal from the formal transformation of the signal of telecommunication BADCEF) by the opto-electronic conversion interface, by Optical Fiber Transmission to receiving terminal SDH equipment 904.Receiving terminal SDH equipment receive packet 1 (00110100, BADCEF) after, be the form of the signal of telecommunication by the opto-electronic conversion interface from the formal transformation of light signal after, send to receiving terminal protective relaying device 905.Transmission line between receiving terminal protective relaying device 905 and the receiving terminal SDH equipment is a coaxial cable; but 905 transmission of receiving terminal protective relaying device is light signal; so at packet 1 (00110100; BADCEF) be transferred to receiving terminal protective relaying device 905 from receiving terminal SDH equipment 904 before; also to pass through photoelectricity converter device 906 again with packet 1 (00110100; BADCEF) from the light signal formal transformation be the form of the signal of telecommunication, send to receiving terminal protective relaying device 905 then.
Receiving terminal protective relaying device 905 and transmitting terminal protective relaying device 901 have a mapping relations table, and as shown in figure 10, the check code that identical digital signal is corresponding unique only provides the corresponding relation of part check code and digital signal among the figure.
As shown in figure 11; receiving terminal protective relaying device 905 comprises computing module 1101 (calculation element) and detects processing module 1102 (detection processing unit); computing module 1201 is used for the mapping relations according to Figure 10 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, BADCEF) the corresponding digital signal in Figure 10 of the check code BADCFE in is 11001101, and the digital signal in the packet 1 is 00110100, can know in the packet 1 to have been added interference signal by TWM-1 communication error code generator, 1101 pairs of packets that transmit every 3ms of computing module carry out similar detection.TWM-1 communication error code generator only adds interference signal to partial data, TWM-1 communication error code generator can be set add interference signal at set intervals one time, for example can set every 24ms and add an interference signal.Whether disturbed signal change is an error code to digital signal in computing module 1101 each packet of detection; calculate the quantity of data packets that is added into interference signal in continuous 100 packets; supposing to have calculated 8 disturbed signal changes of packet is error code; it is error code that 92 packets do not have disturbed signal change; detect processing module 1102 with 92 with 100 packets of the regulation of protective relaying device in the quantity of normal data packet (packet that holds normal signal) compare; if the error rate that relay protection device allows is 93 (the quantity differences of normal data packet in 100 packets of different protective relaying device regulations); illustrate that then this protective relaying device can not bear the error rate of 8% ((100-92)/100); detect processing module 1102 and will carry out alarm; tripping operation or passage handover operation, the passage handover operation is realized by photoelectric conversion device.If the error rate of relay protection device is 10%, illustrate that then this protective relaying device can bear 8% the error rate, detect processing module 1102 and do not carry out alarm, tripping operation or passage handover operation.But for different protective relaying devices; owing to there is the current signal of reflection operation of power networks situation in the transmission signals; the threshold value that has different correct data quantity when carrying out the calculating of operation of power networks situation; when the quantity that only receives normal data packet arrives the threshold value of correct data quantity, just carry out the calculating of operation of power networks situation.Illustrate; if the threshold value of the correct data quantity when protective relaying device carries out the calculating of operation of power networks situation is 93; when the quantity of normal data packet in 100 data that this protective relaying device receives is 92; can't carry out the calculating of operation of power networks situation; must receive a normal data packet again; just can carry out the calculating of operation of power networks situation, if this moment calculated value when being higher than the action definite value of this protective relaying device, detect processing module 1102 and will carry out and alarm or trip operation.
Introduced above when not having PCM equipment; how to detect the transmission performance of relay protection device; when having PCM equipment; transfer of data with do not have the PCM equipment class seemingly; different is when inserting transmitting terminal PCM equipment before transmitting terminal SDH equipment; can before transmitting terminal PCM equipment, add interference signal, also can after transmitting terminal PCM equipment, add interference signal.
As shown in figure 12; the packet 1 (00110101 that sends from transmitting terminal protective relaying device 901; BADCEF) transmit with the light signal form; and the transmission line between transmitting terminal protective relaying device 901 and the transmitting terminal PCM equipment is a Shielded Twisted Pair; so send packet 1 (00110101 to transmitting terminal PCM equipment 1201 at transmitting terminal protective relaying device 901; BADCEF) before; to the light signal dress be changed to the signal of telecommunication by photoelectricity converter device 906; then to 1201 transmission of transmitting terminal PCM equipment; transmitting terminal PCM equipment 1201 receives packet 1 (00110101; BADCEF), and to transmitting terminal SDH equipment 902 transmit.At packet 1 (00110101; BADCFE) in transmitting terminal SDH equipment 902 transmission courses; the TWM-1 that is coupled between transmitting terminal PCM equipment 1201 and the transmitting terminal SDH equipment 902 communicates by letter error code generator 903 at packet 1 (00110101; BADCEF) add interference signal (TWM-1 communication error code generator 903 also can be coupled in transmitting terminal PCM equipment 1201 and transmitting terminal protective relaying device 901) in; packet 1 (00110101; BADCEF) become packet 1 (00110100, BADCEF).Transmitting terminal SDH equipment 902 will add interference signal packet 1 (00110100, be the form of light signal from the formal transformation of the signal of telecommunication BADCEF) by the opto-electronic conversion interface, by Optical Fiber Transmission to receiving terminal SDH equipment 904.Receiving terminal SDH equipment 904 receives packet 1 (00110100; BADCEF) after; after being the form of the signal of telecommunication by the opto-electronic conversion interface from the formal transformation of light signal; transmit to receiving terminal PCM equipment 1202 by coaxial cable; 1202 transmission of receiving terminal PCM equipment receive packet 1 (00110100; BADCEF) after, send to receiving terminal protective relaying device 905 by Shielded Twisted Pair.Receiving terminal protective relaying device 905 passes through optical signal transmission fiber; so at packet 1 (00110100; BADCEF) be transferred to receiving terminal protective relaying device 905 from receiving terminal PCM equipment 1202 before; also to pass through photoelectricity converter device 906 again with packet 1 (00110100; BADCEF) be converted to the form of light signal from electrical signal form, send to receiving terminal protective relaying device 905 then.
Receiving terminal protective relaying device 905 and transmitting terminal protective relaying device 901 have a mapping relations table, and as shown in figure 10, the check code that identical digital signal is corresponding unique only provides the corresponding relation of part check code and digital signal among the figure.
As shown in figure 11; receiving terminal protective relaying device 905 comprises computing module 1101 (calculation element) and detects processing module 1102 (detection processing unit); computing module 1201 is used for the mapping relations according to Figure 10 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, BADCEF) the corresponding digital signal in Figure 10 of the check code BADCFE in is 11001101, and the digital signal in the packet 1 is 00110100, can know in the packet 1 to have been added interference signal by TWM-1 communication error code generator, 1101 pairs of packets that transmit every 3ms of computing module carry out similar detection.TWM-1 communication error code generator only adds interference signal to partial data, TWM-1 communication error code generator can be set add interference signal at set intervals one time, for example can set every 24ms and add an interference signal.Whether disturbed signal change is an error code to digital signal in computing module 1101 each packet of detection; calculate the quantity of data packets that is added into interference signal in continuous 100 packets; supposing to have calculated 8 disturbed signal changes of packet is error code; it is error code that 92 packets do not have disturbed signal change; detect processing module 1102 with 92 with 100 packets of the regulation of protective relaying device in the quantity of normal data packet compare; if the error rate that relay protection device allows is 93 (the quantity differences of normal data packet in 100 packets of different protective relaying device regulations); illustrate that then this protective relaying device can not bear the error rate of 8% ((100-92)/100); detect processing module 1102 and will carry out alarm; tripping operation or passage handover operation, the passage handover operation is realized by photoelectric conversion device.If the error rate of relay protection device is 10%, illustrate that then this protective relaying device can bear 8% the error rate, detect processing module 1102 and do not carry out alarm, tripping operation or passage handover operation.But for different protective relaying devices; owing to there is the current signal of reflection operation of power networks situation in the transmission signals; the threshold value that has different correct data quantity when carrying out the calculating of operation of power networks situation; when the quantity that only receives normal data packet arrives the threshold value of correct data quantity, just carry out the calculating of operation of power networks situation.Illustrate; if the threshold value of the correct data quantity when protective relaying device carries out the calculating of operation of power networks situation is 93; when the quantity of normal data packet in 100 data that this protective relaying device receives is 92; can't carry out the calculating of operation of power networks situation; must receive a normal data packet again; just can carry out the calculating of operation of power networks situation, if this moment calculated value when being higher than the action definite value of this protective relaying device, detect processing module 1102 and will carry out and alarm or trip operation.
The actuating signal of current signal, voltage signal, contact point signal and the output of two ends protective relaying device of DF 1024 wave tracer collections input two ends protective relaying device, signal record is convenient to analyze relatively in same document.For example; when sudden change appears in electric current; RTDS real-timedigital simulation system sends to the transmitting terminal protective relaying device with 50 current break signals in 100 current break signals; other 50 current break signals send to the receiving terminal protective relaying device, and whether the receiving terminal protective relaying device needs to carry out alarm and trip operation by following function calculation:
y＝f(x1，x2，x3……xn)
N=(50+a), a are the number of receiving end protective relaying device from the normal data packet of transmitting terminal protective relaying device reception.
There is the threshold value b of an operation according to the correct data quantity of above-mentioned formula calculating in the receiving terminal protective relaying device, the protection performance of b value reflection receiving terminal protective relaying device.As n during more than or equal to b, carry out above-mentioned formula and calculate, could carry out and alarm or trip operation.As n during less than b, could calculate after also the signal that will wait the back not add error code transmits, at this moment postpone with regard to life period, can analyze the b value by the waveform instrument like this, judge the protection performance of the protective relaying device at two ends.
Communication transmission passage between transmitting terminal protective relaying device and the receiving terminal protective relaying device is a duplex channel, and receiving terminal and transmitting terminal are mutual.When communication when the receiving terminal protective relaying device is initiated, the receiving terminal protective relaying device is carried out the function of transmitting terminal protective relaying device just as the transmitting terminal protective relaying device, the function of transmitting terminal protective relaying device execution reception protective relaying device.In like manner, receiving terminal SDH equipment also can be used as transmitting terminal SDH equipment, and receiving terminal PCM equipment also can be used as transmitting terminal PCM equipment, as shown in figure 13 (PCM equipment is not shown).
The utility model embodiment only produces error code with TWM-1 communication error code generator and changes the data of transmitting in the passage, also but Datang Telecom's passage detection platform adds interference signal in the data of transmission, change original data, for example can produce passage switching, communication channel delay variation, error code, interruption, LOF alarm, various interference signals such as ring, clock frequency variation certainly, the purpose of these interference signals all is the data that change transmission, is not giving unnecessary details at this.
The protective relaying device of the utility model embodiment can be the protective device of different manufacturers production; for example be RCS931 longitudinal differential protection equipment and CSC103 longitudinal differential protection equipment; the error rate difference that different protective relaying devices bears; there is the definite value of an error rate in each protective relaying device; in case the error rate of transmitting in the passage is higher than the definite value of this device error rate; protective relaying device will carry out alarm operation, can effectively detect the performance of protective relaying device.
The utility model embodiment only with RTDS real-timedigital simulation system as Digital Simulation System, PA60 type power amplifier is as power amplifier, the DF1024 waveform analysis device describes as waveform analysis device, is not to be used to limit the utility model.
The utility model embodiment adds the fault and the interference of simulation in transmission channel; detected transmission performance that can be real-time; can be simultaneously to system carry out Static Detection (alarm signal of status signal and trip signal detect) and detection of dynamic (voltage signal, current signal and contact point signal detect) when taking place in the actual electric network because access issues when causing protection exception or incorrect operation; can be convenient to search accident cause utilizing this relay protection digital channel fault detection system to carry out fault simulation.
Claims (9)
1. relay protection digital channel fault test set, it is characterized in that, described equipment comprises: the Digital Simulation device, the transmitting terminal protective device, transmitting terminal synchronous digital transmitting device, interference signal generation device, receiving terminal synchronous digital transmitting device and receiving terminal protective device, described Digital Simulation device is connected with described transmitting terminal protective device, described transmitting terminal protective device is connected with described transmitting terminal synchronous digital transmitting device, described transmitting terminal synchronous digital transmitting device is connected by optical fiber with described receiving terminal synchronous digital transmitting device, described interference signal generation device is coupled between described transmitting terminal protective device and the described transmitting terminal synchronous digital transmitting device, and described receiving terminal synchronous digital transmitting device is connected with described receiving terminal protective device;
Described Digital Simulation device produces voltage signal, current signal and the contact point signal of reflection operation of power networks state;
Described transmitting terminal protective device produces status signal, and transmission comprises the transmission signals of described status signal, described voltage signal, current signal and contact point signal;
Described transmitting terminal synchronous digital transmitting device receives described transmission signals, and imports described transmission signals into optical fiber and transmit;
Described interference signal generation device adds interference signal in described transmission signals;
Described receiving terminal synchronous digital transmitting device receives the described transmission signals from described Optical Fiber Transmission, and transmits described transmission signals;
Described receiving terminal protective device receives the described transmission signals of described receiving terminal synchronous digital transmitting device transmission; and calculate the quantity of normal signal in the described transmission signals; the quantity and the definite value of described normal signal are compared; if the quantity of described normal signal less than described definite value, is carried out alarm, tripping operation or passage handover operation.
2. equipment as claimed in claim 1 is characterized in that, described equipment also comprises: signal amplifying apparatus, described signal amplifying apparatus are connected between described transmitting terminal protective device and the described Digital Simulation device, amplify described voltage signal and current signal.
3. equipment as claimed in claim 2; it is characterized in that; described equipment also comprises: the waveform analysis device; described waveform analysis device is connected between described signal amplifying apparatus and the described transmitting terminal protective device, writes down and analyze described status signal, described voltage signal, current signal and contact point signal.
4. equipment as claimed in claim 1, it is characterized in that, described equipment also comprises: transmitting terminal pulse code modulation device and receiving terminal pulse code modulation device, described transmitting terminal pulse code modulation device is connected between described transmitting terminal protective device and the described transmitting terminal synchronous digital transmitting device, and described receiving terminal pulse code modulation device is connected between described receiving terminal protective device and the described receiving terminal synchronous digital transmitting device;
It is the route of 64K that described transmitting terminal pulse code modulation device provides bandwidth, and the described transmission signals that the receiving end/sending end protective device is sent sends to described transmitting terminal synchronous digital transmitting device with described transmission signals;
It is the route of 64K that described receiving terminal pulse code modulation device provides bandwidth, receives the described transmission signals that described receiving terminal synchronous digital transmitting device is sent, and described transmission signals is sent to the receiving terminal protective device detect processing.
5. equipment as claimed in claim 4 is characterized in that, described interference signal generation device is coupled between described transmitting terminal protective device and the described transmitting terminal pulse code modulation device.
6. equipment as claimed in claim 4 is characterized in that, described interference signal generation device is coupled between described transmitting terminal synchronous digital transmitting device and the described transmitting terminal pulse code modulation device.
7. equipment as claimed in claim 1 is characterized in that, described transmitting terminal synchronous digital transmitting device and described receiving terminal synchronous digital transmitting device are on the passage of 2M route.
8. equipment as claimed in claim 1 is characterized in that, described receiving terminal protective device comprises: computing unit and detection processing unit, and described computing unit is connected with described detection processing unit;
Described computing unit calculates the quantity of normal signal in the described transmission signals;
Described detection processing unit during less than described definite value, is carried out alarm, tripping operation and passage handover operation in the quantity of described normal signal.
9. equipment as claimed in claim 1 is characterized in that, described interference signal generation device is error code generator or passage checkout gear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009201057548U CN201369730Y (en) | 2009-03-06 | 2009-03-06 | Relay protective channel fault detection equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009201057548U CN201369730Y (en) | 2009-03-06 | 2009-03-06 | Relay protective channel fault detection equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102208806A (en) * | 2010-03-30 | 2011-10-05 | 华北电网有限公司 | DC interference test control system |
| CN107084757A (en) * | 2017-03-29 | 2017-08-22 | 国家电网公司 | One kind protection passage special detector |
-
2009
- 2009-03-06 CN CNU2009201057548U patent/CN201369730Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102208806A (en) * | 2010-03-30 | 2011-10-05 | 华北电网有限公司 | DC interference test control system |
| CN102208806B (en) * | 2010-03-30 | 2013-06-19 | 华北电网有限公司 | DC interference test control system |
| CN107084757A (en) * | 2017-03-29 | 2017-08-22 | 国家电网公司 | One kind protection passage special detector |
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