CN113030607A - Automatic test system of distribution automation terminal - Google Patents
Automatic test system of distribution automation terminal Download PDFInfo
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- CN113030607A CN113030607A CN202110203310.3A CN202110203310A CN113030607A CN 113030607 A CN113030607 A CN 113030607A CN 202110203310 A CN202110203310 A CN 202110203310A CN 113030607 A CN113030607 A CN 113030607A
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Abstract
The invention relates to an automatic testing system for a distribution automation terminal, which can realize comprehensive and systematic inspection of distribution automation terminals of different manufacturers based on issued standards and specifications. The invention can flexibly organize the test scheme aiming at different conditions, carry out efficient closed-loop protocol test and function test on various terminals in the market according to different standards, and automatically generate test reports. The implementation of the invention shortens the time of a single test from the past several days to dozens of minutes, avoids the problems of low accuracy, incomplete test and complex test result calculation of manual test, greatly improves the test accuracy and test efficiency, effectively reduces the time and energy of detection personnel, and is a powerful intelligent detection system for the distribution automation equipment.
Description
Technical Field
The invention relates to the technical field of power distribution terminal detection, in particular to an automatic test system for a power distribution automation terminal.
Background
With the rapid development of national economy, the demand for electric power is continuously rising, and the automation of electric power systems in China is rapidly developed since the 90 s of the 20 th century. Meanwhile, in order to ensure safe and stable operation of a power grid and a power plant, secondary equipment of a transformer substation is increasingly paid attention to by a power system.
Due to the intense market competition, it is impossible to ensure that all the equipment at the dispatching end and the station end are provided by a single manufacturer. The functions and the quality of distribution automation terminal equipment products of various manufacturers are different, and once problems occur, the troubleshooting is difficult; the problem of a little complexity or accidental problem can be solved only by spending a great deal of time and energy on evidence obtaining and analysis by a dispatching end manufacturer, a plant station end manufacturer, a communication manufacturer and a user, and the problem is very easy to be solved because the reason is difficult to determine and can generate withering pushing and tearing, thereby bringing great burden to engineering construction debugging, commissioning and daily operation maintenance of the user.
Due to the complexity and diversity of equipment, protocols and user requirements, no special product can solve the problem of the user until now, and the maintenance efficiency of the user on an automatic system is improved. The time and effort thus spent each year, and the losses due to the failure to check the abnormality of the operation of the equipment, are extremely large in terms of the national power system.
In order to ensure that products selected in automatic construction of the power distribution network are complete in function, excellent in performance, durable and reliable, network access detection work is carried out according to actual conditions of the power distribution network and related technical requirements, whether performance quality of distribution automation terminal equipment conforms to a nominal value and equipment specifications of the distribution automation terminal equipment is checked and compared, whether various index requirements of the distribution automation terminal of a state network company are met or not is judged, and reference basis of main functions and technical indexes under the same test platform is provided for bidding of the distribution automation equipment.
In the prior art, the power distribution automation terminal inspection is a complex and tedious work, the current detection tool almost completely focuses on the simulation test of a communication protocol and the manual simulation test of a three-remote signal in an open-loop mode, the detection can be only carried out in a manual or semi-automatic mode, a large amount of time and energy are needed, some functional detection items need a large amount of repeated operation verification of detection personnel, and misoperation is easy to generate; moreover, the distribution automation terminal has a plurality of functional detection items, each functional detection item is relatively independent, and the defects of the prior art are as follows:
1) regarding fault current detection, the detecting party usually determines whether the detection is qualified by applying fault current and time to the distribution automation terminal according to data parameters (current threshold value, fault time) provided by the detected party and observing whether the detected distribution automation terminal generates a fault current signal. Strictly speaking, the method is not strict, the fault time is usually in millisecond level as a time unit, the sampling and calculation of the current also needs a period, the fault current value and time are applied for multiple times, and the tested distribution automation terminal may miss a certain fault signal;
2) with regard to telecommand SOE resolution detection, the detection of this item is in milliseconds as a unit of time, and such precise time requirements are almost impossible to achieve with manual detection; the detection equipment in the prior art usually performs single-level detection only according to the SOE resolution index given by the detected distribution automation terminal to judge whether the SOE resolution index is qualified or not; if the SOE resolution index of the tested distribution automation terminal is unknown, the SOE resolution index is difficult to detect;
3) regarding the remote measurement precision detection, in the prior art, a detection device outputs remote measurement values such as current, voltage and the like to a distribution automation terminal, and then reads and compares the remote measurement values given by the distribution automation terminal to calculate the remote measurement precision; the telemetering precision at a certain moment can be reflected, and the precision detection result is not strict enough;
4) with respect to state quantity consistency testing, manual control of the DI/DO device (DI: the switching value input reflects whether the state of the switching value is on or off; DO: the switching value output can be a relay or a high-power tube and the like; ) The output quantity is output to the tested distribution automation terminal, and whether the remote signaling quantity display of the tested distribution automation terminal is correct or not is observed; the whole testing process needs repeated operation, so that a large amount of time is consumed, and misoperation is easy to generate.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide an automatic testing system for distribution automation terminals, so that comprehensive and systematic inspection of the distribution automation terminals of different manufacturers is realized.
The technical scheme of the invention is as follows:
an automatic testing system of a distribution automation terminal comprises a standard simulation source, a standard simulation meter, an open-in generator, an open-out generator, a clock system and a main control unit, wherein the standard simulation source and the standard simulation meter are respectively connected with the distribution automation terminal to be tested; the tested distribution automation terminal is connected with the main control unit through a protocol communication port; the main control unit controls a standard simulation source, a standard simulation meter, an input generator, an output generator and a clock system, and performs one or more of fault current threshold/time boundary value detection, remote signaling SOE resolution test, continuity remote sensing precision detection, state quantity consistency detection, avalanche test, remote signaling jitter test and remote control test on the tested distribution automation terminal.
Preferably, the step of fault current threshold/time boundary detection is as follows:
1) initializing, setting the threshold range (I) for detecting fault currentmin，Imax) Time of failure T, fault current I applied to distribution automation terminal under testStep length fStepTotal number of tests N, number of alarms generated N 10, actual number of applications N 20; wherein the initial value of the fault current I is Imin；
2) Applying fault current I, fault time T and application times N to the tested distribution automation terminal2Adding 1; judging whether the tested distribution automation terminal generates an alarm signal, if so, generating alarm times N1Adding 1 and executing step 4); if not, executing step 3);
3) increase of fault current I by one step fStepGenerating the number of times of alarm N1Set to 0, number of applications N2Setting 0; judging whether the fault current I is larger than ImaxIf so, judging that the fault current threshold of the tested distribution automation terminal overflows, and finishing the detection; if not, returning to the step 2) until the fault current I is larger than Imax；
4) Judging the number of applications N2Whether the current fault current I is equal to the total test frequency N or not is judged, if yes, the detection is stopped, and the current fault current I is judged to be the fault current threshold value of the tested distribution automation terminal; if not, returning to the step 2) until the application times N2Equal to the total number of tests N.
Preferably, the fault current detection is performed automatically a plurality of times on the basis of the fault current threshold/time limit detection, and the steps are as follows:
1) initializing, setting the fault current I, the fault time T, the total test times N and the alarm generation times N of the distribution automation terminal to be tested10, actual number of applications N2＝0；
2) Applying fault current I, fault time T and application times N to the tested distribution automation terminal2Adding 1; judging whether the tested distribution automation terminal generates an alarm signal, if so, generating alarm times N1Adding 1, if not, executing step 3);
3) judging the number of applications N2Whether the number of times of the test is equal to the total test number N or not is judged, if yes, the detection is stopped, and the accuracy is counted; if not, returning to the step 2) until the application times N2Is equal to the total measurementNumber of trials N.
Preferably, the steps of the telesignaling SOE resolution test are as follows:
1) initialization, setting of remote signalling SOE resolution (T)min，Tmax) DO channel DO of test1、DO2Test resolution T, Final resolution T of SOE s0; wherein the initial value of the test resolution T is Tmax；
2) For channel DO1Performing displacement, after interval T, to channel DO2Performing displacement, judging whether two SOE items uploaded by the tested distribution automation terminal are received or not, and if so, executing the step 3); if not, executing step 5);
3) judging whether the two SOE matters have a difference T, if so, judging the final resolution TsAssigning the current test resolution T, subtracting 1 from the test resolution T, and executing the step 4); if not, executing step 5);
4) judging whether the testing resolution T is less than TminAnd if yes, judging the final resolution T of the tested distribution automation terminalsIs T; if not, returning to the step 2) until the testing resolution T is not less than Tmin；
5) Judging the final resolution TsWhether the resolution is equal to 0 or not, if yes, the test is judged to fail, and if not, the final resolution T of the tested distribution automation terminal is judgedsIs T.
Preferably, the step of persistent telemetry accuracy detection is as follows:
1) initializing, setting a continuous telemetering precision detection time period T and a gear N for each telemetering measurement; the telemetric quantity comprises the current I of each gearNVoltage UNCOS, power factorNFrequency FNWherein N is 1, 2, 3, …, N; the first applied gear N is 1;
2) applying current I of Nth gear to tested distribution automation terminalNVoltage UNCOS, power factorNFrequency FNThe time for applying each remote measurement to the distribution automation terminal to be measured is Ts(ii) a Receiving tested distribution automation terminalEach remote measurement transmitted by the terminal is recorded, the maximum value and the minimum value of each remote measurement are recorded, and the moment of receiving each remote measurement transmitted by the tested distribution automation terminal is T1；
3) Judgment of TsAnd T1If the time difference is greater than T, if yes, executing step 4); if not, returning to the step 2) until TsAnd T1The time difference is greater than T;
4) calculating the actual telemetering precision of each telemetering measurement of the measured distribution automation terminal at the current gear, and adding 1 to the gear N;
5) judging whether each telemetering quantity completes the detection of all gears, if so, comparing the actual telemetering precision of all gears of each telemetering quantity with the performance index of the tested distribution automation terminal, and automatically generating a detection report; if not, returning to the step 2) until the detection of all gears of each telemetering measurement is completed.
Preferably, in step 4), the method for calculating the actual telemetry accuracy of each telemetry measurement is as follows:
A) maximum deviation value K of remote measurementoff，KoffThe absolute value of the difference between the current gear and the minimum value of the remote measurement and the absolute value of the difference between the current gear and the maximum value of the remote measurement are larger values;
B) actual telemetry accuracy P ═ Koff/KForehead (forehead)100% of, wherein KForehead (forehead)Is a remotely measured nominal value.
Preferably, the step of detecting the state quantity consistency is as follows:
1) initializing, setting each DO channel displacement time interval T, reading N columns in total of the state quantity consistency detection scheme list and DO channel DO corresponding to each columnnDetecting a row nRow; wherein, the initial value of the detection row nRow is 1, N is 1, 2, 3, …, N;
2) DO corresponding to the n Row linenCarrying out deflection, and waiting for remote signaling deflection information to be transmitted on the tested distribution automation terminal; judging whether a channel DO is received within a time interval TnCorresponding telecommand displacement information, if yes, executing step 3), and if no, executing step 5);
3) determining the channel DOnWhether the corresponding remote signaling displacement information is associated with the channel DOnThe output is consistent, if yes, step 4) is executed, and if no, step 5) is executed;
4) adding 1 to the detection line nRow, judging whether the detection line nRow is larger than N, if so, judging that the state quantities of all DO channels are consistent, and automatically generating a report; if not, returning to the step 2) until the detection line nRow is more than N;
5) and judging that the state quantities of the DO channels are inconsistent, detecting the consistency of the state quantities to be unqualified, and automatically generating a report.
Preferably, the steps of the avalanche test are as follows:
1) initializing, reading the DO channel DO to be avalanche1～DOn；
2) Controlling a DO module board of the main control unit, and simultaneously displacing a DO channel to be subjected to avalanche testing;
3) receiving telecommand SOE items sent by a tested distribution automation terminal, judging whether the telecommand SOE items corresponding to all DO channels are complete and the SOE time scales are the same or not, if so, ending avalanche detection, judging that the avalanche detection is qualified, and generating a detection report; if not, the avalanche detection is finished, the detection is judged to be unqualified, and a detection report is generated.
Preferably, the steps of the remote signaling jitter test are as follows:
1) initializing, reading the DO channel DO to be tested for remote signaling jitter1～DOnSetting anti-shake time T;
2) controlling the DO output of a DO module board of the main control unit, and closing the DO output after the anti-shake time T lasts;
3) waiting for receiving whether a tested distribution automation terminal sends a remote signaling SOE item corresponding to a DO channel or not, if not, finishing remote signaling jitter detection, judging to be qualified, and generating a detection report; if so, the remote signaling jitter detection is finished, the remote signaling jitter detection is judged to be unqualified, and a detection report is generated.
Preferably, the remote control test comprises a remote control batch test, a remote control fault tolerance test, a remote control response time test and a remote control output pulse width test, and the execution rate of normal remote control commands of the tested distribution automation terminal, the possibility of whether wrong remote control commands trigger wrong control, the response speed of the remote control commands and the remote control output pulse width are respectively detected.
The invention has the following beneficial effects:
the automatic detection system for the distribution automation terminal can realize comprehensive and systematic detection on the distribution automation terminals of different manufacturers based on the issued standards and specifications. The invention can flexibly organize the test scheme aiming at different conditions, carry out efficient closed-loop protocol test and function test on various terminals in the market according to different standards, and automatically generate test reports.
The implementation of the invention shortens the time of a single test from the past several days to dozens of minutes, avoids the problems of low accuracy, incomplete test and complex test result calculation of manual test, greatly improves the test accuracy and test efficiency, effectively reduces the time and energy of detection personnel, and is a powerful intelligent detection system for the distribution automation equipment.
The invention can realize the detection of the fault current threshold value/time boundary value, realize the automatic multiple fault current detection on the basis of realizing the fault current detection, and calculate the accuracy by counting the result; the fault current threshold/time boundary value of the tested distribution automation terminal can be detected, the current threshold and the time of 100% fault signals generated by the terminal are detected, and the performance index of the fault current detection function of the tested distribution automation terminal is calculated, so that the fault current detection method has great reference value.
The invention can realize the SOE resolution test of remote signaling, and can realize the test of the maximum remote signaling resolution of 1 millisecond level; an automatic multi-level polling test method is adopted in the test process, an SOE resolution range can be defined by user, automatic all-dimensional polling detection from low precision to high precision is achieved, the operation is simple and rapid, and the detection efficiency is greatly improved.
The invention can realize continuous telemetering precision detection, can count the upper limit and the lower limit of telemetering precision in a time period, and takes the maximum precision deviation value in the time period as a detection result, and the result is more rigorous and reliable compared with the prior art.
The system can realize the consistency detection of the state quantity, integrates the DO module, can automatically control the output quantity of the DO module, reads the remote signaling state of the tested distribution automation terminal, compares the remote signaling state, can define the times, is fully automatic in the whole process, and reduces the workload and the error rate of testers.
The invention can realize avalanche test, and by controlling the DO module to output the output quantity in a concurrent manner, outputting the multiple DO to the tested distribution automation terminal at the same time, reading the SOE record of the tested distribution automation terminal, the processing capacity of the tested distribution automation terminal on the multiple concurrent input quantities can be tested, and the result can be used as an important performance reference index of the distribution automation terminal.
The invention can realize the remote signaling jitter test, the tested distribution automation terminal should not generate the remote signaling deflection signal when the output time of the DO module is controlled to be less than the jitter time index of the tested distribution automation terminal, and the tested distribution automation terminal should generate the correct remote signaling deflection signal when the output time of the DO module is controlled to be more than or equal to the jitter time index of the tested distribution automation terminal, so as to judge whether the remote signaling jitter function of the tested terminal is qualified.
The invention can realize remote control test, covers remote control batch test, remote control fault tolerance test, remote control response time test, remote control output pulse width test and the like, and can detect the performance indexes such as the execution rate of normal remote control commands of the tested distribution automation terminal, the possibility of whether wrong remote control commands can trigger wrong control, the response speed of the remote control commands, the remote control output pulse width and the like.
Drawings
FIG. 1 is a schematic diagram of the framework of the present invention;
FIG. 2 is an overall block diagram of the present invention;
FIG. 3 is a functional block diagram of the present invention;
FIG. 4 is a flow chart illustrating fault current threshold/time boundary detection;
FIG. 5 is a schematic flow diagram of automatic multiple fault current detection;
FIG. 6 is a schematic flow chart of a telesignaling SOE resolution test;
FIG. 7 is a schematic flow chart of persistent telemetry accuracy detection;
FIG. 8 is a flow chart illustrating state quantity consistency detection;
FIG. 9 is a schematic flow chart of an avalanche test;
fig. 10 is a flow chart of a remote signaling jitter test.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
The automatic testing system of the distribution automation terminal comprises a standard simulation source, a standard simulation meter, an input generator, an output generator, a clock system and a main control unit, wherein the standard simulation source and the standard simulation meter are respectively connected with the distribution automation terminal to be tested; the tested distribution automation terminal is connected with the main control unit through a protocol communication port; the main control unit controls a standard simulation source, a standard simulation meter, an input generator, an output generator and a clock system, and performs one or more of fault current threshold/time boundary value detection, remote signaling SOE resolution test, continuity remote sensing precision detection, state quantity consistency detection, avalanche test, remote signaling jitter test and remote control test on the tested distribution automation terminal.
In this embodiment, as shown in fig. 2 and 3, the automatic testing system of the distribution automation terminal runs on a server, and in specific implementation, a blade server may be used to configure a window server operating system. The main control unit can be implemented as an embedded main control machine, a high-precision GPS clock (instant needle system) is arranged in the main control unit, a DI/DO module board is arranged in the main control unit, the capacity of the extensible remote signaling DI/DO module board is 32 paths at most, the main control unit can be used as a service end of a power distribution automatic test system, and the detection operation can also be independently carried out. And the server, the main control computer and the standard simulation source are in data communication through the industrial-grade switch. The high-precision program-controlled standard analog source provides an API (application program interface) interface, and can realize remote output, closing and the like of telemetering values such as current, voltage and the like of the analog source.
The fault current threshold/time boundary detection, as shown in fig. 4, comprises the following steps:
1) initializing, setting the threshold range (I) for detecting fault currentmin，Imax) Fault time T, fault current I applied to the distribution automation terminal to be tested, step length fStepTotal number of tests N, number of alarms generated N 10, actual number of applications N 20; wherein the initial value of the fault current I is Imin；
2) Applying fault current I, fault time T and application times N to the tested distribution automation terminal2Adding 1; judging whether the tested distribution automation terminal generates an alarm signal, if so, generating alarm times N1Adding 1 and executing step 4); if not, executing step 3);
3) increase of fault current I by one step fStepGenerating the number of times of alarm N1Set to 0, number of applications N2Setting 0; judging whether the fault current I is larger than ImaxIf so, judging that the fault current threshold of the tested distribution automation terminal overflows, and finishing the detection; if not, returning to the step 2) until the fault current I is larger than Imax；
4) Judging the number of applications N2Whether the current fault current I is equal to the total test frequency N or not is judged, if yes, the detection is stopped, and the current fault current I is judged to be the fault current threshold value of the tested distribution automation terminal; if not, returning to the step 2) until the application times N2Equal to the total number of tests N.
On the basis of realizing the fault current threshold/time boundary value detection, automatic multiple fault current detection is carried out, as shown in fig. 5, the steps are as follows:
1) initializing, setting the fault current I, the fault time T, the total test times N and the alarm generation times N of the distribution automation terminal to be tested10, actual number of applications N2＝0；
2) Applying fault current I, fault time T and application times N to the tested distribution automation terminal2Adding 1; judging the distribution to be testedWhether the automatic terminal generates an alarm signal or not, if so, generating alarm times N1Adding 1, if not, executing step 3);
3) judging the number of applications N2Whether the number of times of the test is equal to the total test number N or not is judged, if yes, the detection is stopped, and the accuracy is counted; if not, returning to the step 2) until the application times N2Equal to the total number of tests N.
The remote signaling SOE resolution test is shown in FIG. 6, and comprises the following steps:
1) initialization, setting of remote signalling SOE resolution (T)min，Tmax) DO channel DO of test1、DO2Test resolution T, Final resolution T of SOE s0; wherein the initial value of the test resolution T is Tmax；
2) For channel DO1Performing displacement, after interval T, to channel DO2Performing displacement, judging whether two SOE items uploaded by the tested distribution automation terminal are received or not, and if so, executing the step 3); if not, executing step 5);
3) judging whether the two SOE matters have a difference T, if so, judging the final resolution TsAssigning the current test resolution T, subtracting 1 from the test resolution T, and executing the step 4); if not, executing step 5);
4) judging whether the testing resolution T is less than TminAnd if yes, judging the final resolution T of the tested distribution automation terminalsIs T; if not, returning to the step 2) until the testing resolution T is not less than Tmin；
5) Judging the final resolution TsWhether the resolution is equal to 0 or not, if yes, the test is judged to fail, and if not, the final resolution T of the tested distribution automation terminal is judgedsIs T.
The continuous telemetry precision detection is as shown in fig. 7, and the steps are as follows:
1) initializing, setting a continuous telemetering precision detection time period T and a gear N for each telemetering measurement; the telemetric quantity comprises the current I of each gearNVoltage UNCOS, power factorNFrequency, frequencyRate FNWherein N is 1, 2, 3, …, N; the first applied gear N is 1;
2) applying current I of Nth gear to tested distribution automation terminalNVoltage UNCOS, power factorNFrequency FNThe time for applying each remote measurement to the distribution automation terminal to be measured is Ts(ii) a Receiving each telemetering value sent by the tested distribution automation terminal, recording the maximum value and the minimum value of each telemetering value, and the moment of receiving each telemetering value sent by the tested distribution automation terminal is T1；
3) Judgment of TsAnd T1If the time difference is greater than T, if yes, executing step 4); if not, returning to the step 2) until TsAnd T1The time difference is greater than T;
4) calculating the actual telemetering precision of each telemetering measurement of the measured distribution automation terminal at the current gear, and adding 1 to the gear N;
5) judging whether each telemetering quantity completes the detection of all gears, if so, comparing the actual telemetering precision of all gears of each telemetering quantity with the performance index of the tested distribution automation terminal, and automatically generating a detection report; if not, returning to the step 2) until the detection of all gears of each telemetering measurement is completed.
In step 4), the method for calculating the actual telemetry precision of each telemetry measurement is as follows:
A) maximum deviation value K of remote measurementoff，KoffThe absolute value of the difference between the current gear and the minimum value of the remote measurement and the absolute value of the difference between the current gear and the maximum value of the remote measurement are larger values;
B) actual telemetry accuracy P ═ Koff/KForehead (forehead)100% of, wherein KForehead (forehead)Is a remotely measured nominal value.
Taking the current I as an example, take the maximum deviation value, i.e. Ioff1＝|Imin–In|，Ioff2＝|Imax–InIf I is takenoff1And Ioff2The maximum value of the two is deviation value Ioff(ii) a Current accuracy ═ Ioff/IForehead (forehead)100% of the total weight; wherein，IForehead (forehead)Is the rated value of the current.
Voltage, power factor and frequency are calculated in the same way.
As shown in fig. 8, the state quantity consistency detection includes the following steps:
1) initializing, setting each DO channel displacement time interval T, reading N columns in total of the state quantity consistency detection scheme list and DO channel DO corresponding to each columnnDetecting a row nRow; wherein, the initial value of the detection row nRow is 1, N is 1, 2, 3, …, N;
2) DO corresponding to the n Row linenCarrying out deflection, and waiting for remote signaling deflection information to be transmitted on the tested distribution automation terminal; judging whether a channel DO is received within a time interval TnCorresponding telecommand displacement information, if yes, executing step 3), and if no, executing step 5);
3) determining the channel DOnWhether the corresponding remote signaling displacement information is associated with the channel DOnThe output is consistent, if yes, step 4) is executed, and if no, step 5) is executed;
4) adding 1 to the detection line nRow, judging whether the detection line nRow is larger than N, if so, judging that the state quantities of all DO channels are consistent, and automatically generating a report; if not, returning to the step 2) until the detection line nRow is more than N;
5) and judging that the state quantities of the DO channels are inconsistent, detecting the consistency of the state quantities to be unqualified, and automatically generating a report.
The avalanche test, as shown in fig. 9, comprises the following steps:
1) initializing, reading the DO channel DO to be avalanche1～DOn；
2) Controlling a DO module board of the main control unit, and simultaneously displacing a DO channel to be subjected to avalanche testing;
3) receiving telecommand SOE items sent by a tested distribution automation terminal, judging whether the telecommand SOE items corresponding to all DO channels are complete and the SOE time scales are the same or not, if so, ending avalanche detection, judging that the avalanche detection is qualified, and generating a detection report; if not, the avalanche detection is finished, the detection is judged to be unqualified, and a detection report is generated.
The remote signaling jitter test, as shown in fig. 10, includes the following steps:
1) initializing, reading the DO channel DO to be tested for remote signaling jitter1～DOnSetting anti-shake time T;
2) controlling the DO output of a DO module board of the main control unit, and closing the DO output after the anti-shake time T lasts;
3) waiting for receiving whether a tested distribution automation terminal sends a remote signaling SOE item corresponding to a DO channel or not, if not, finishing remote signaling jitter detection, judging to be qualified, and generating a detection report; if so, the remote signaling jitter detection is finished, the remote signaling jitter detection is judged to be unqualified, and a detection report is generated.
The remote control test comprises a remote control batch test, a remote control fault tolerance test, a remote control response time test and a remote control output pulse width test, and respectively detects the execution rate of normal remote control commands of the tested distribution automation terminal, the possibility of whether error remote control commands trigger error control, the response speed of the remote control commands and the remote control output pulse width.
The above examples are provided only for illustrating the present invention and are not intended to limit the present invention. Changes, modifications, etc. to the above-described embodiments are intended to fall within the scope of the claims of the present invention as long as they are in accordance with the technical spirit of the present invention.
Claims (10)
1. An automatic testing system of a distribution automation terminal is characterized by comprising a standard simulation source, a standard simulation meter, an input generator, an output generator, a clock system and a main control unit, wherein the standard simulation source and the standard simulation meter are respectively connected with the distribution automation terminal to be tested; the tested distribution automation terminal is connected with the main control unit through a protocol communication port; the main control unit controls a standard simulation source, a standard simulation meter, an input generator, an output generator and a clock system, and performs one or more of fault current threshold/time boundary value detection, remote signaling SOE resolution test, continuity remote sensing precision detection, state quantity consistency detection, avalanche test, remote signaling jitter test and remote control test on the tested distribution automation terminal.
2. The distribution automation terminal automatic test system of claim 1 wherein the fault current threshold/time boundary detection steps are as follows:
1) initializing, setting the threshold range (I) for detecting fault currentmin，Imax) Fault time T, fault current I applied to the distribution automation terminal to be tested, step length fStepTotal number of tests N, number of alarms generated N10, actual number of applications N20; wherein the initial value of the fault current I is Imin；
2) Applying fault current I, fault time T and application times N to the tested distribution automation terminal2Adding 1; judging whether the tested distribution automation terminal generates an alarm signal, if so, generating alarm times N1Adding 1 and executing step 4); if not, executing step 3);
3) increase of fault current I by one step fStepGenerating the number of times of alarm N1Set to 0, number of applications N2Setting 0; judging whether the fault current I is larger than ImaxIf so, judging that the fault current threshold of the tested distribution automation terminal overflows, and finishing the detection; if not, returning to the step 2) until the fault current I is larger than Imax；
4) Judging the number of applications N2Whether the current fault current I is equal to the total test frequency N or not is judged, if yes, the detection is stopped, and the current fault current I is judged to be the fault current threshold value of the tested distribution automation terminal; if not, returning to the step 2) until the application times N2Equal to the total number of tests N.
3. The distribution automation terminal automatic test system of claim 2, wherein upon detection of a fault current threshold/time boundary value, automatic multiple fault current detection is performed by:
1) initializing, setting the fault current I, the fault time T, the total test times N and the alarm generation times N of the distribution automation terminal to be tested10, actual number of applications N2＝0；
2) Applying fault current I, fault time T and application times N to the tested distribution automation terminal2Adding 1; judging whether the tested distribution automation terminal generates an alarm signal, if so, generating alarm times N1Adding 1, if not, executing step 3);
3) judging the number of applications N2Whether the number of times of the test is equal to the total test number N or not is judged, if yes, the detection is stopped, and the accuracy is counted; if not, returning to the step 2) until the application times N2Equal to the total number of tests N.
4. The distribution automation terminal automatic test system of claim 1 wherein the steps of remotely signaled SOE resolution test are as follows:
1) initialization, setting of remote signalling SOE resolution (T)min，Tmax) DO channel DO of test1、DO2Test resolution T, Final resolution T of SOEs0; wherein the initial value of the test resolution T is Tmax；
2) For channel DO1Performing displacement, after interval T, to channel DO2Performing displacement, judging whether two SOE items uploaded by the tested distribution automation terminal are received or not, and if so, executing the step 3); if not, executing step 5);
3) judging whether the two SOE matters have a difference T, if so, judging the final resolution TsAssigning the current test resolution T, subtracting 1 from the test resolution T, and executing the step 4); if not, executing step 5);
4) judging whether the testing resolution T is less than TminAnd if yes, judging the final resolution T of the tested distribution automation terminalsIs T; if not, returning to the step 2) until the testing resolution T is not less than Tmin；
5) Judging the final resolution TsWhether it is equal to 0, ifIf yes, judging that the test fails, and if not, judging the final resolution T of the tested distribution automation terminalsIs T.
5. The distribution automation terminal automatic test system of claim 1 wherein the step of persistent telemetry accuracy detection is as follows:
1) initializing, setting a continuous telemetering precision detection time period T and a gear N for each telemetering measurement; the telemetric quantity comprises the current I of each gearNVoltage UNCOS, power factorNFrequency FNWherein N is 1, 2, 3, …, N; the first applied gear N is 1;
2) applying current I of Nth gear to tested distribution automation terminalNVoltage UNCOS, power factorNFrequency FNThe time for applying each remote measurement to the distribution automation terminal to be measured is Ts(ii) a Receiving each telemetering value sent by the tested distribution automation terminal, recording the maximum value and the minimum value of each telemetering value, and the moment of receiving each telemetering value sent by the tested distribution automation terminal is T1；
3) Judgment of TsAnd T1If the time difference is greater than T, if yes, executing step 4); if not, returning to the step 2) until TsAnd T1The time difference is greater than T;
4) calculating the actual telemetering precision of each telemetering measurement of the measured distribution automation terminal at the current gear, and adding 1 to the gear N;
5) judging whether each telemetering quantity completes the detection of all gears, if so, comparing the actual telemetering precision of all gears of each telemetering quantity with the performance index of the tested distribution automation terminal, and automatically generating a detection report; if not, returning to the step 2) until the detection of all gears of each telemetering measurement is completed.
6. The distribution automation terminal automatic test system according to claim 5, characterized in that in step 4), the actual telemetry accuracy of each telemetry measurement is calculated as follows:
A) maximum deviation value K of remote measurementoff，KoffThe absolute value of the difference between the current gear and the minimum value of the remote measurement and the absolute value of the difference between the current gear and the maximum value of the remote measurement are larger values;
B) actual telemetry accuracy P ═ Koff/KForehead (forehead)100% of, wherein KForehead (forehead)Is a remotely measured nominal value.
7. The distribution automation terminal automatic test system according to claim 1, characterized in that the step of state quantity consistency detection is as follows:
1) initializing, setting each DO channel displacement time interval T, reading N columns in total of the state quantity consistency detection scheme list and DO channel DO corresponding to each columnnDetecting a row nRow; wherein, the initial value of the detection row nRow is 1, N is 1, 2, 3, …, N;
2) DO corresponding to the n Row linenCarrying out deflection, and waiting for remote signaling deflection information to be transmitted on the tested distribution automation terminal; judging whether a channel DO is received within a time interval TnCorresponding telecommand displacement information, if yes, executing step 3), and if no, executing step 5);
3) determining the channel DOnWhether the corresponding remote signaling displacement information is associated with the channel DOnThe output is consistent, if yes, step 4) is executed, and if no, step 5) is executed;
4) adding 1 to the detection line nRow, judging whether the detection line nRow is larger than N, if so, judging that the state quantities of all DO channels are consistent, and automatically generating a report; if not, returning to the step 2) until the detection line nRow is more than N;
5) and judging that the state quantities of the DO channels are inconsistent, detecting the consistency of the state quantities to be unqualified, and automatically generating a report.
8. The distribution automation terminal automatic test system of claim 1 wherein the steps of avalanche testing are as follows:
1) initializing, reading the DO channel DO to be avalanche1～DOn；
2) Controlling a DO module board of the main control unit, and simultaneously displacing a DO channel to be subjected to avalanche testing;
3) receiving telecommand SOE items sent by a tested distribution automation terminal, judging whether the telecommand SOE items corresponding to all DO channels are complete and the SOE time scales are the same or not, if so, ending avalanche detection, judging that the avalanche detection is qualified, and generating a detection report; if not, the avalanche detection is finished, the detection is judged to be unqualified, and a detection report is generated.
9. The distribution automation terminal automatic test system of claim 1 wherein the steps of remote signaling jitter testing are as follows:
1) initializing, reading the DO channel DO to be tested for remote signaling jitter1～DOnSetting anti-shake time T;
2) controlling the DO output of a DO module board of the main control unit, and closing the DO output after the anti-shake time T lasts;
3) waiting for receiving whether a tested distribution automation terminal sends a remote signaling SOE item corresponding to a DO channel or not, if not, finishing remote signaling jitter detection, judging to be qualified, and generating a detection report; if so, the remote signaling jitter detection is finished, the remote signaling jitter detection is judged to be unqualified, and a detection report is generated.
10. The automatic test system of the distribution automation terminal of claim 1, wherein the remote control test comprises a remote control batch test, a remote control fault tolerance test, a remote control response time test, and a remote control output pulse width test, and respectively detects an execution rate of a normal remote control command of the distribution automation terminal to be tested, a possibility of whether an erroneous remote control command triggers an erroneous control, a response speed of the remote control command, and a remote control output pulse width.
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