CN105372611A - Reliability verification method for SV data acquired based on wave recording device - Google Patents
Reliability verification method for SV data acquired based on wave recording device Download PDFInfo
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- CN105372611A CN105372611A CN201510843256.3A CN201510843256A CN105372611A CN 105372611 A CN105372611 A CN 105372611A CN 201510843256 A CN201510843256 A CN 201510843256A CN 105372611 A CN105372611 A CN 105372611A
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Abstract
The invention relates to a reliability verification method for SV data acquired based on a wave recording device. S groups of SV messages are set, and rated time delay, voltage channel fundamental wave, current channel fundamental wave and harmonic wave content of SV link channels are set; harmonic wave, voltage and current are applied to each group of SV link channels at certain intervals; waveforms generated by each group of SV data are recorded by utilizing the wave recording device, and each order of harmonic wave content, voltage and current amplitude precision of each waveform and phase difference of in-phase channels are obtained through a tester; and whether the error requirement of reliability of the SV data acquired by the wave recording device is met is judged, and if the judgment result is yes, the SV data acquired by the wave recording device have certain reliability through verification. The method for verifying reliability of the SV data acquired by the wave recording device is simple in process and high in test efficiency and accuracy.
Description
Technical field
The present invention relates to the reliability verification method gathering SV data based on wave recording device, belong to the technical field of intelligent substation data acquisition.
Background technology
In recent years, electric power be China's rapid economic development provide powerful support and powerful guarantee, digital intelligent transformer station to be applied in China more and more universal.Whole electric system arbitrary portion breaks down, and all can cause direct or indirect impact to the development of national economy.Intelligent trouble wave recording device (dynamic recording device) is as " black box " in electric system, the operation information of electric system can be recorded truly, and the reason of accurately positioning analysis fault generation, therefore, intelligent trouble wave recording device is the key component ensureing intelligent substation safe operation.The reliability of the SV of detection failure wave recording device collection at any time message is necessary.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, propose the reliability verification method gathering SV data based on wave recording device, utilizing wave recording device to gather the order of accuarcy of SV data in intelligent substation for proving.
The present invention is achieved by following scheme:
Gather the reliability verification method of SV data based on wave recording device, step is as follows:
Step 1, setting N group SV message, and the specified time delay of SV link channel, voltage channel first-harmonic, current channel first-harmonic and harmonic content are set; Every at regular intervals all to SV link apply different number of times harmonic wave, the voltage channel of each group of SV link is applied different multiples rated voltage Un, to each group of SV link protection current channel with measure the rated current In that current channel applies different multiples;
Step 2, utilizes the waveform that wave recording device recording step 1 produces, and tester is connected to described wave recording device, and obtains the harmonic content of in each waveform each time, the phase differential of voltage and current amplitude precision and homophase passage;
Step 3, calculate the phase differential of the error of the content of harmonic wave, voltage and current amplitude precision and homophase passage, and the error of reliability is possessed according to the SV data that the standard of setting judges whether to meet wave recording device collection, if meet, can verify that the SV data utilizing this wave recording device to gather have certain reliability.
Further, the rated voltage Un described in step 1 is 57.74V, and described rated current In is 1A.
Further, the specified time delay arranged described in step 1 is respectively 757us, 1399us, 800us and 1629us; Voltage channel first-harmonic is 57.74V; Current channel first-harmonic is 1A; Harmonic content is 20%.
Further; meeting the error that wave recording device collection SV data can be utilized to possess reliability requirement described in step 3 is: the amplitude precision of described voltage is maximum is no more than 0.1%; the amplitude precision of described protective current is maximum is no more than 2%; the amplitude precision of described measurement electric current is maximum is no more than 2%; described harmonic content error is not more than 5%, and the phase differential of described homophase passage is not more than 2%.
The present invention's beneficial effect is compared to the prior art:
The present invention proposes a kind of reliability verification method gathering SV data based on wave recording device, by applying the harmonic wave of different number of times to SV link channel, and the passage of each group SV link applies the rated voltage of different multiples and the rated current of different multiples, utilize the various waveforms that wave recording device record SV message file produces, tester is connected with wave recording device, thus obtains the phase differential of harmonic content, amplitude precision and the homophase passage in SV wave file.According to the error met the demands, can judge that wave recording device gathers the reliability of SV data.The present invention verifies that wave recording device gathers in the method for SV data reliability, process is simple, testing efficiency and accuracy high, be a kind of approach of highly effective checking wave recording device reliability, can be widely used in the detection of each intelligent substation.
Accompanying drawing explanation
Fig. 1 the present invention is based on the process flow diagram that wave recording device gathers the reliability verification method of SV data.
Embodiment
Below in conjunction with drawings and Examples, the present invention will be further described in detail.
The reliability verification method of SV data is gathered based on wave recording device, because synchronous sampling algorithm serves crucial effect in the program of whole wave recording device, and synchronized algorithm the most frequently used is at present interpolation algorithm, therefore, to verify that wave recording device utilizes interpolation algorithm to gather the reliability of SV data in the present embodiment, be described in detail, step is as follows:
(1) setting of SV link: design the message file that comprises 4 groups of SV links in the present embodiment.In order to verify impact interpolation algorithm being gathered to SV data reliability under different sampling stages, under the prerequisite of every cycle 4000 point sampling, typical specified time delay is set respectively to often organizing link is: 757us, 1399us, 800us and 1629us (as shown in table 1).Arrange voltage channel first-harmonic 57.74V in SV link, current channel first-harmonic 1A, harmonic content is 20%.
As shown in table 1, often at regular intervals respectively to the harmonic wave often organizing SV link and apply different number of times.In the present embodiment respectively the 1st apply in 0.5 second 12 subharmonic, the 2nd apply in 0.5 second 13 subharmonic, the 3rd apply in 0.5 second 15 subharmonic, the 4th apply in 0.5 second 20 subharmonic, the 5th apply 25 subharmonic in 0.5 second; The data started for 2.6th second are in order to accuracy in computation.
Then, for the voltage channel of each group of SV link, execute the rated voltage Un=57.74V of certain multiple at regular intervals respectively.Apply magnitude of voltage to the voltage channel of each group of SV link respectively every 0.5s in the present embodiment, concrete magnitude of voltage is: 0.1Un, 0.5Un, Un, 2Un.For protective current passage and the measurement current channel of each group of SV link, execute the rated current In=1A of certain multiple at regular intervals respectively; In the present embodiment; respectively current value is applied to the protective current passage of each group of SV link every 0.5s; concrete current value is: 0.1In, 0.5In, In, 2In, 20In, and apply current value to measurement current channel, concrete current value is: 0.1In, 0.2In, 0.5In, In, 2In.
Table 1SV link design
(2) waveform generated after each harmonic utilizing wave recording device employing interpolation algorithm record to apply SV link, voltage and current.Then, adopt point-to-point pattern, each light mouth of tester is connected respectively to each collection light mouth of wave recording device.Utilize tester playback message, check the phase differential obtaining each harmonic content, electric current and voltage amplitude precision and homophase passage.If the voltage and current amplitude precision error calculated is no more than the scope (scope of concrete setting is as shown in table 5) of setting, harmonic content error is not more than 5%, the phase differential of homophase passage is not more than 2%, proves that wave recording device utilizes the SV data of difference arithmetic collection to have certain reliability.
The model of the wave recording device selected in the present embodiment is WGL-801B intelligent substation wave recording device, and the tester model selected is the RTS-100DG light digital relay protection tester of journey science and technology forever.
Experimental analysis and conclusion:
Arrange four groups of SV links numbering respectively APPID be 4074,4075,4076 and 4077.Above-mentioned method is utilized to verify the reliability that wave recording device utilizes interpolation algorithm to gather SV data.Carrying out (as shown in table 2) in stress_responsive genes experiment; voltage 1 and protection 1 electric current A phase 1 is protected respectively for the bus 1A phase in SV link; arranging the bus 1A phase be numbered in the SV link of 4075 protects the specified time delay of voltage 1 to be 1399; the specified time delay arranging the protection 1 electric current A phase 1 be numbered in the SV link of 4074 is 757; arranging the bus 1A phase be numbered in the SV link of 4077 protects the specified time delay of voltage 1 to be 1629, and the specified time delay arranging the protection 1 electric current A phase 1 in the SV link be numbered in 4076 is 800.The result of each harmonic waveform utilizing above-mentioned verification method to draw is as shown in table 2, each passage is when different sampling stages is with the different subharmonic of applying, error is all less than 5% of requirement, proves that utilizing interpolation algorithm to gather SV data at wave recording device has good reliability.
In the experiment carrying out SV link each channel voltage current amplitude precision and phase differential (as shown in Table 3 and Table 4), for the voltage channel of SV link, applying bus 1A phase respectively protects voltage to be 2Un, bus 1B phase protects voltage to be Un, bus 1C phase protects voltage to be 0.5Un, and bus 2A phase protects voltage to be 0.1Un; For the protective current passage of SV link, applying protection 2 electric current A phase is respectively 50In, protects 2 electric current B phases for 20In, protects 1 electric current A phase for In, protects 1 electric current B phase for 0.5In, protects 1 electric current C phase for 0.1In; For the measurement current channel of SV link, applying measurement 1 electric current A phase is respectively 2In and In, measures 1 electric current B phase for 0.5In and 0.2In, measures 1 electric current C phase for 0.1In.As shown in table 3 by testing the current/voltage precision result obtained; the result of each phase differential of voltage is as shown in table 4; draw from table 3 and table 4 analysis; the amplitude precision error of the voltage of each passage, protective current and measurement electric current is all not more than each parameter error value required by table 5; the protection voltage phase difference of each homophase passage is also all less than 2 °, demonstrates wave recording device equally and utilizes interpolation algorithm collection SV data to possess certain reliability.
In sum, whether the SV data of the wave recording device collection utilizing method of the present invention can effectively verify in intelligent substation possess reliability.
The error log of table 2 each harmonic
Data precision record under the different amplitude of table 3
Table 4 phase differential record
| Contrast passage (citing) | Phase differential between 4 groups of link homophase passages |
| Bus 1A phase protects voltage | ＜2° |
| Bus 1B phase protects voltage | ＜2° |
| Bus 1C phase protects voltage | ＜2° |
Table 5SV changes amplitude accuracy requirement
Demonstrating wave recording device in the present embodiment utilizes interpolation algorithm to gather the reliability of SV data, only with interpolation algorithm citing in the present embodiment, is not limitation of the present invention.As other embodiments, wave recording device adopts other synchronized algorithms to gather the reliability of SV data to utilize method of the present invention can verify equally.
Under the thinking that the present invention provides; the mode easily expected to those skilled in the art is adopted to convert the technological means in above-described embodiment, replace, revise; and the effect played goal of the invention that is substantially identical with the relevant art means in the present invention, that realize is also substantially identical; the technical scheme of such formation is carried out fine setting to above-described embodiment and is formed, and this technical scheme still falls within the scope of protection of the present invention.
Claims (4)
1. gather the reliability verification method of SV data based on wave recording device, it is characterized in that, step is as follows:
Step 1, setting N group SV message, and the specified time delay of SV link channel, voltage channel first-harmonic, current channel first-harmonic and harmonic content are set; Every at regular intervals all to SV link apply different number of times harmonic wave, the voltage channel of each group of SV link is applied different multiples rated voltage Un, to each group of SV link protection current channel with measure the rated current In that current channel applies different multiples;
Step 2, utilizes the waveform that wave recording device recording step 1 produces, and tester is connected to described wave recording device, and obtains the harmonic content of in each waveform each time, the phase differential of voltage and current amplitude precision and homophase passage;
Step 3, calculate the phase differential of the error of the content of harmonic wave, voltage and current amplitude precision and homophase passage, and the error of reliability is possessed according to the SV data that the standard of setting judges whether to meet wave recording device collection, if meet, can verify that the SV data utilizing this wave recording device to gather have certain reliability.
2. the reliability verification method gathering SV data based on wave recording device according to claim 1, it is characterized in that, the rated voltage Un described in step 1 is 57.74V, and described rated current In is 1A.
3. the reliability verification method gathering SV data based on wave recording device according to claim 1, is characterized in that, the specified time delay arranged described in step 1 is respectively 757us, 1399us, 800us and 1629us; Voltage channel first-harmonic is 57.74V; Current channel first-harmonic is 1A; Harmonic content is 20%.
4. the reliability verification method gathering SV data based on wave recording device according to claim 1; it is characterized in that; meeting the error that wave recording device collection SV data can be utilized to possess reliability requirement described in step 3 is: the amplitude precision of described voltage is maximum is no more than 0.1%; the amplitude precision of described protective current is maximum is no more than 2%; the amplitude precision of described measurement electric current is maximum is no more than 2%; described harmonic content error is not more than 5%, and the phase differential of described homophase passage is not more than 2%.
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Cited By (2)
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| CN113283068A (en) * | 2021-05-18 | 2021-08-20 | 天津凯发电气股份有限公司 | Method for improving alternating current sampling precision and reliability of relay protection device |
| CN116626576A (en) * | 2023-07-25 | 2023-08-22 | 深圳基本半导体有限公司 | Probe phase error determining device and method |
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| CN116626576B (en) * | 2023-07-25 | 2023-11-07 | 深圳基本半导体有限公司 | Probe phase error determining device and method |
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