CN203250019U - 750 kV substation instrument transformer on-site wireless calibrator - Google Patents
750 kV substation instrument transformer on-site wireless calibrator Download PDFInfo
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- CN203250019U CN203250019U CN 201320317611 CN201320317611U CN203250019U CN 203250019 U CN203250019 U CN 203250019U CN 201320317611 CN201320317611 CN 201320317611 CN 201320317611 U CN201320317611 U CN 201320317611U CN 203250019 U CN203250019 U CN 203250019U
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Abstract
The utility model discloses a 750 kV substation instrument transformer on-site wireless calibrator. The wireless calibrator comprises a master device and an auxiliary device in wireless connection, and the master device and the auxiliary device have synchronization signals. The master device regulates and collects secondary signals of a standard instrument transformer, carries out A/D conversion of the secondary signals of the standard instrument transformer, and then sends synchronization signals to the secondary device. The master device calculates and processes digital signals of the standard instrument transformer and wireless digital signals of an instrument transformer to be tested of the secondary device, wherein all the digital signals are obtained through the A/D conversion. Compared values and the phase difference are obtained and displayed after the two kind signals are compared by the master device. The secondary device regulates and collects secondary signals of the instrument transformer to be tested, and carries out A/D conversion of the secondary signals of the instrument transformer to be tested. When the secondary device obtains the synchronization signals sent by the master device, the secondary device sends the digital signals converted by the A/D conversion manner of the instrument transformer to be tested to the master device. The 750 kV substation instrument transformer on-site wireless calibrator can overcome defects that the conventional technology is affected by the environment greatly, is of high failure rate and has serious errors, and the 750 kV substation instrument transformer on-site wireless calibrator is advantaged by high reliability, small errors and little influence by the environment.
Description
Technical field
The utility model relates to transformer station transformer error detection technique field, particularly, relates to the wireless tester of a kind of 750kV transformer station's mutual inductor on site.
Background technology
The calibrating of 750KV transformer station transformer error generally is by mutual-inductor tester and standard mutual inductor at present, Burden box, the common composition one cover mutual-inductor calibration device employing of large capacity power source relatively error of measurement method principle is examined and determine, need to be with the normalized current (/ voltage) mutual inductor of no-load voltage ratio during calibrating, up-flow (/ press) device, electric current (/ voltage) Burden box and once connect wire and be connected wire with secondary, by the given standard mutual inductor primary side of power supply and the identical amount of tested mutual inductor primary side, standard mutual inductor secondary side and tested mutual inductor secondary side compare, obtain secondary current (/ press) poor of the two, measure tested transformer error by mutual-inductor tester.Standard mutual inductor is than general high two accuracy classes of tested mutual inductor.
But when the 750KV substation field is examined and determine, because site environment is more abominable, can occur that wiring is improper, wiring is complicated, need the situation of rechecking, and on-the-spot surface condition can cause wire damaged, causes the signal transmission distortion, affects error information, if standard mutual inductor and tested mutual inductor space length are far away, need longer secondary wiring, introduce the secondary voltage drop additive error, thereby cause the data of transformer error distortion.
In realizing process of the present utility model, the inventor finds to exist at least in the prior art large, the defective such as failure rate is high and error is large affected by environment.
The utility model content
The purpose of this utility model is, for the problems referred to above, proposes the wireless tester of a kind of 750kV transformer station's mutual inductor on site, to realize little, reliability is high and error is little advantage affected by environment.
For achieving the above object, the technical solution adopted in the utility model is: the wireless tester of a kind of 750kV transformer station's mutual inductor on site comprises wireless connections and has main frame and the slave of synchronizing signal; Wherein:
Described main frame for the secondary singal of conditioning, collection and A/D transfer standard mutual inductor, sends synchronizing signal to slave; And, based on the digital signal of the tested mutual inductor of the digital signal of A/D conversion gained standard mutual inductor and slave wireless transmission, carry out data operation and process, obtain the two fiducial value and phase differential after relatively, and show;
Described slave is used for the secondary singal that conditioning, collection and A/D change tested mutual inductor, and after receiving the synchronizing signal that main frame sends, with the radio transmission of digital signals of the tested mutual inductor after the A/D conversion to main frame.
Further, described main frame, comprise the host signal conditioning unit, host data collecting unit, host data operation processing unit and the main frame wireless communication unit that are connected with standard mutual inductor successively, be connected to the synchronous clock unit between described host data collecting unit and the slave, and the display unit that is connected with described host data operation processing unit and/or main frame wireless communication unit.
Further, described host data collecting unit comprises the host data collector and the first standard A/D unit that are connected in turn between described host signal conditioning unit and the host data operation processing unit; Described the first standard A/D unit is connected with the synchronous clock unit.
Further, described synchronous clock unit comprises the GPS receiving trap that can produce the pulse per second (PPS) clock signal.
Further, described host data operation processing unit comprises Fourier transform module, windowed interpolation computing module, comparison module and the ratio difference and the phase difference calculating module that are connected in turn between described host data collecting unit and main frame wireless communication unit and/or the display unit.
Further, described display unit comprises LCDs.
Further, comprise the slave signal condition unit, slave data acquisition unit, slave data operation processing unit and the slave wireless communication unit that are connected in turn between tested mutual inductor and the main frame, described slave data acquisition unit is connected with main frame.
Further, described slave data acquisition unit comprises the slave data acquisition unit and the second standard A/D unit that are connected in turn between described slave signal condition unit and the slave data operation processing unit; Described the second standard A/D unit is connected with main frame.
Further, described host data operation processing unit comprises the Fourier transform module, windowed interpolation computing module and the data transmission blocks that are connected in turn between described slave data acquisition unit and the slave wireless communication unit.
The wireless tester of 750kV transformer station mutual inductor on site of each embodiment of the utility model is owing to comprise wireless connections and have main frame and the slave of synchronizing signal; Main frame for the secondary singal of conditioning, collection and A/D transfer standard mutual inductor, sends synchronizing signal to slave; And, based on the digital signal of the tested mutual inductor of the digital signal of A/D conversion gained standard mutual inductor and slave wireless transmission, carry out data operation and process, obtain the two fiducial value and phase differential after relatively, and show; Slave is used for the secondary singal that conditioning, collection and A/D change tested mutual inductor, and after receiving the synchronizing signal that main frame sends, with the radio transmission of digital signals of the tested mutual inductor after the A/D conversion to main frame; In the time of can carrying out the transformer error calibrating in 750KV transformer station, need not too many secondary wiring, make things convenient for wiring; Thereby can overcome large, failure rate is high and error is large defective affected by environment in the prior art, to realize little, reliability is high and error is little advantage affected by environment.
Other features and advantages of the utility model will be set forth in the following description, and, partly from instructions, become apparent, perhaps understand by implementing the utility model.
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
Description of drawings
Accompanying drawing is used to provide further understanding of the present utility model, and consists of the part of instructions, is used from explanation the utility model with embodiment one of the present utility model, does not consist of restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the principle of work synoptic diagram of the wireless tester of the utility model 750kV transformer station's mutual inductor on site;
Fig. 2 is the principle of work synoptic diagram of the tested current transformer systems of verification among the utility model embodiment one;
Fig. 3 is the principle of work synoptic diagram of the tested voltage transformer (VT) of verification system among the utility model embodiment two.
By reference to the accompanying drawings, Reference numeral is as follows among the utility model embodiment:
The 1-main frame; 101-host signal conditioning unit; 102-the first standard A/D unit; 103-host data operation processing unit; 104-main frame wireless communication unit; The 105-display unit; The 2-slave; 201-slave signal condition unit; 202-the second standard A/D unit; 203-slave data operation processing unit; 204-slave wireless communication unit; 301-main frame synchronous clock unit.
Embodiment
Below in conjunction with accompanying drawing preferred embodiment of the present utility model is described, should be appreciated that preferred embodiment described herein only is used for description and interpretation the utility model, and be not used in restriction the utility model.
According to the utility model embodiment, as shown in Figure 1-Figure 3, provide a kind of 750kV transformer station's mutual inductor on site wireless tester, so that carry out transformer error when calibrating in 750KV transformer station, need not too many secondary wiring, make things convenient for wiring; Can also distinguish the signal of testing standard mutual inductor and tested mutual inductor, reduce the error rate of wiring, solution is because of standard mutual inductor and tested mutual inductor space length when far away, oversize and the test error that brings of mutual connection wire, alleviate staff's labour intensity, increase work efficiency, guarantee experimental facilities and personnel's safety.
Referring to Fig. 1, the wireless tester of 750kV transformer station mutual inductor on site of the utility model embodiment, be comprised of main frame (such as main frame 1) and slave (such as slave 2) two parts, inside is integrated with signal condition unit, data acquisition unit, wireless communication unit, synchronous clock unit, data operation processing unit and display unit.The secondary singal of main frame conditioning, collection and transfer standard mutual inductor, the secondary singal of tested mutual inductor is nursed one's health, gathered and change to slave, after the synchronous clock unit sends synchronizing signal, the signal of slave is passed to main frame by radio communication, process through the data operation of main frame, obtain ratio difference and the phase differential of two signals after relatively.
Wherein, main frame comprises: signal condition unit (such as host signal conditioning unit 101), the standard mutual inductor secondary singal is nursed one's health, obtain reflecting the standard small voltage signal of standard mutual inductor secondary value, be input as the standard mutual inductor secondary singal, be output as the standard small voltage signal of reflection standard mutual inductor secondary value; Data acquisition unit (comprising the first standard A/D unit 102), convert the analog quantity of standard mutual inductor secondary singal to digital quantity through A/D, be input as the standard small voltage signal of signal condition unit, be output as the digital signal of reflection standard mutual inductor secondary value; Wireless communication unit (such as main frame wireless communication unit 104) carries out duplex communication to the signal of main frame and slave, and the clock signal that is about to main frame to slave, and transfers to main frame with the tested transducer signal of slave by wireless way for transmitting; Synchronous clock unit (such as synchronous clock unit 301) produces the pulse per second (PPS) clock signal by the GPS receiving trap, in order to the A/D conversion of master synchronization and slave; Data operation processing unit (such as host data operation processing unit 103), data to the transmission of data collecting unit are processed according to Fourier transform and window function and interpolation algorithm, compare with tested mutual inductor secondary singal, calculate tested mutual inductor with respect to ratio difference and the phase differential of standard mutual inductor; Display unit (such as display unit 105), the fundamental waveform figure of the oscillogram of demonstration synchronizing clock signals and standard mutual inductor secondary, tested mutual inductor secondary, show in real time that simultaneously tested mutual inductor is at (%) of a certain rated current point, δ ('), In(%) (or Un(%)) value.
Slave comprises: signal condition unit (such as slave signal condition unit 201), tested mutual inductor secondary singal is nursed one's health, obtain reflecting the standard small voltage signal of tested mutual inductor secondary value, be input as tested mutual inductor secondary singal, be output as the standard small voltage signal of the tested mutual inductor secondary value of reflection; Data acquisition unit (comprising the second standard A/D unit 202), convert the analog signals of tested mutual inductor secondary to digital quantity through A/D, be input as the standard small voltage signal of signal condition unit, be output as the digital signal of the tested mutual inductor secondary value of reflection; Wireless communication unit (such as slave wireless communication unit 204), the synchronizing clock signals that Receiving Host sends sends tested mutual inductor secondary singal to main frame; Data operation processing unit (such as slave data operation processing unit 203) is processed according to Fourier transform and window function and interpolation algorithm the data of data collecting unit transmission, the data after processing is sent to main frame compares.
Referring to Fig. 2 and Fig. 3, embodiment is specifically described the below to the utility model respectively.
Embodiment one
Referring to Fig. 2, the wireless tester of 750kV transformer station mutual inductor on site of present embodiment is tested the operation of tested current transformer error, may further comprise the steps:
⑴ alternating current 220V power supply connects the input end of pressure regulator T1, the input end of the output termination current lifting device SL of pressure regulator T1, the primary side of current lifting device SL output termination standard current transformer CT0 and tested Current Transmit X, form closed loop, standard current transformer CT0 and tested Current Transmit X polar end are linked in sequence.
⑵ access the secondary terminals of tested Current Transmit X the CT terminal of the utility model slave 2 with the CT terminal of the secondary terminals access host 1 of standard current transformer CT0.
⑶ open the power switch of main frame 1 and slave 2, the special software HZD1-W of the wireless tester of operation the utility model embodiment 750kV transformer station's mutual inductor on site, input the parameter of tested Current Transmit X: primary current, secondary current, rated load, lower limited load, power factor, accuracy class, factory number, the parameter typing is complete, hit testing, regulate that pressure regulator T1 makes that test point covers that rules require have a few, error information is inserted form.
The workflow of above-mentioned main frame 1 and slave 2 further comprises:
⑴ regulate pressure regulator T1, current lifting device SL and offer standard current transformer CT0 and tested Current Transmit X, makes its primary current reach ratings.
⑵ standard current transformer CT0 secondary obtains secondary induction current input host signal conditioning unit 101, host signal conditioning unit 101 conditioning secondary singals convert standard small voltage simulating signal to, the small voltage signal converts digital quantity input host data operation processing unit 103 to through the first standard A/D unit 102, the signal condition unit 201 of simultaneously tested Current Transmit X secondary induction current input slave, slave signal condition unit 201 conditioning secondary singals, convert standard small voltage simulating signal to, the small voltage signal converts digital quantity input slave data operation processing unit 203 to through the second standard A/D unit 202.
⑶ main frame synchronous clock unit 301 is when primary current reaches ratings, send synchronous pulse per second (PPS) to the first standard A of main frame 1 and slave 2/D unit 102 and the second standard A/D unit 202, constantly grasp the data of standard current transformer CT0 and tested Current Transmit X secondary singal at this, slave 2 is by slave wireless communication unit 204, with data transmission to main frame 1, after main frame 1 obtains slave 2 data, with two data by Fourier transform and window function and interpolation algorithm, calculate the error information of this ratings, simultaneously squiggle figure and the error information of main frame display unit display standard Current Transmit 0 and tested Current Transmit X.
Embodiment two
The utility model is tested tested voltage transformer error and be may further comprise the steps, and synoptic diagram is seen Fig. 3:
⑴ alternating current 220V power supply connects the input end of pressure regulator T1, the input end of the output termination stepup transformer SY of pressure regulator T1, stepup transformer SY output high pressure termination standard potential transformer PT0 and tested voltage transformer pt X primary side high-pressure side, stepup transformer SY output low pressure termination standard potential transformer PT0 and tested voltage transformer pt X primary side low pressure end, and ground connection.
⑵ access the secondary terminals of tested voltage transformer pt X the PT terminal of slave 2 with the PT terminal of the secondary terminals access host 1 of standard potential transformer PT0.
⑶ open the power switch of main frame 1 and slave 2, move special software HZD1-W of the present utility model, input the parameter of tested voltage transformer pt X: primary voltage, secondary voltage, rated load, lower limited load, power factor, accuracy class, factory number, the parameter typing is complete, hit testing, regulate that pressure regulator T1 makes that test point covers that the regulation rules require have a few, error information is inserted form.
The workflow of above-mentioned main frame 1 and slave 2 further comprises:
⑴ regulate pressure regulator T1, stepup transformer PL and offer standard potential transformer PT0 and tested voltage transformer pt X, makes its primary voltage reach ratings.
⑵ standard potential transformer PT0 secondary obtains secondary induction voltage input host signal conditioning unit 101, host signal conditioning unit 101 conditioning secondary singals convert standard small voltage simulating signal to, the small voltage signal converts digital quantity input host data operation processing unit 103 to through the first standard A/D unit 102, simultaneously tested voltage transformer pt X secondary induction voltage input slave signal condition unit 201, slave signal condition unit 201 conditioning secondary singals, convert standard small voltage simulating signal to, the small voltage signal converts digital quantity input slave data operation processing unit 203 to through the second standard A/D unit 202.
⑶ main frame synchronous clock unit 301 is when primary voltage reaches ratings, send synchronous pulse per second (PPS) to the first standard A of main frame 1 and slave 2/D unit 102 and the second standard A/D unit 202 and constantly grasp the data of standard potential transformer PT0 and tested voltage transformer pt X secondary singal at this, slave 2 by slave wireless communication unit 204 with data transmission to main frame 1, after main frame 1 obtains slave 2 data by main frame wireless communication unit 104, with two data by Fourier transform and window function and interpolation algorithm, calculate the error information of this ratings, simultaneously squiggle figure and the error information of main frame display unit display standard voltage transformer pt 0 and tested voltage transformer pt X.
In sum, the wireless tester of 750kV transformer station mutual inductor on site of the utility model the various embodiments described above, the main synchronous clock unit that adopts is (to the accuracy requirement of clock signal 1 ± 10ns), signal condition unit (requiring the error precision of conditioned signal greater than 0.02 grade), and data acquisition unit (requiring the A/D conversion accuracy greater than 0.01 grade), intuitively display standard mutual inductor and tested mutual inductor real-time waveform figure, can intuitively find out the goodness of fit of the two, can also whether " polarity is anti-" be arranged intuitive judgment in test process, " no-load voltage ratio is wrong ", situations such as " second open circuits " reflects that directly pair of connecting wires is wrong; Can accurately measure tested mutual inductor with respect to the error of standard mutual inductor; The main frame slave is separately used, and makes things convenient for the respectively wiring of standard mutual inductor and tested mutual inductor, increases work efficiency.
It should be noted that at last: the above only is preferred embodiment of the present utility model, be not limited to the utility model, although with reference to previous embodiment the utility model is had been described in detail, for a person skilled in the art, it still can be made amendment to the technical scheme that aforementioned each embodiment puts down in writing, and perhaps part technical characterictic wherein is equal to replacement.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (7)
1. the wireless tester of 750kV transformer station mutual inductor on site is characterized in that, comprises wireless connections and has main frame and the slave of synchronizing signal; Wherein:
Described main frame for the secondary singal of conditioning, collection and A/D transfer standard mutual inductor, sends synchronizing signal to slave; And, based on the digital signal of the tested mutual inductor of the digital signal of A/D conversion gained standard mutual inductor and slave wireless transmission, carry out data operation and process, obtain the two fiducial value and phase differential after relatively, and show;
Described slave is used for the secondary singal that conditioning, collection and A/D change tested mutual inductor, and after receiving the synchronizing signal that main frame sends, with the radio transmission of digital signals of the tested mutual inductor after the A/D conversion to main frame;
Described main frame, comprise the host signal conditioning unit, host data collecting unit, host data operation processing unit and the main frame wireless communication unit that are connected with standard mutual inductor successively, be connected to the synchronous clock unit between described host data collecting unit and the slave, and the display unit that is connected with described host data operation processing unit and/or main frame wireless communication unit;
Described host data operation processing unit comprises Fourier transform module, windowed interpolation computing module, comparison module and the ratio difference and the phase difference calculating module that are connected in turn between described host data collecting unit and main frame wireless communication unit and/or the display unit.
2. the wireless tester of 750kV transformer station's mutual inductor on site according to claim 1, it is characterized in that, described host data collecting unit comprises the host data collector and the first standard A/D unit that are connected in turn between described host signal conditioning unit and the host data operation processing unit; Described the first standard A/D unit is connected with the synchronous clock unit.
3. the wireless tester of 750kV transformer station's mutual inductor on site according to claim 1 is characterized in that described synchronous clock unit comprises the GPS receiving trap that can produce the pulse per second (PPS) clock signal.
4. the wireless tester of 750kV transformer station's mutual inductor on site according to claim 1 is characterized in that described display unit comprises LCDs.
5. the wireless tester of each described 750kV transformer station's mutual inductor on site according to claim 1-4, it is characterized in that, comprise the slave signal condition unit, slave data acquisition unit, slave data operation processing unit and the slave wireless communication unit that are connected in turn between tested mutual inductor and the main frame, described slave data acquisition unit is connected with main frame.
6. the wireless tester of 750kV transformer station's mutual inductor on site according to claim 5, it is characterized in that, described slave data acquisition unit comprises the slave data acquisition unit and the second standard A/D unit that are connected in turn between described slave signal condition unit and the slave data operation processing unit; Described the second standard A/D unit is connected with main frame.
7. the wireless tester of 750kV transformer station's mutual inductor on site according to claim 6, it is characterized in that, described host data operation processing unit comprises the Fourier transform module, windowed interpolation computing module and the data transmission blocks that are connected in turn between described slave data acquisition unit and the slave wireless communication unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320317611 CN203250019U (en) | 2013-06-04 | 2013-06-04 | 750 kV substation instrument transformer on-site wireless calibrator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201320317611 CN203250019U (en) | 2013-06-04 | 2013-06-04 | 750 kV substation instrument transformer on-site wireless calibrator |
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| CN203250019U true CN203250019U (en) | 2013-10-23 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103308879A (en) * | 2013-06-04 | 2013-09-18 | 国家电网公司 | Mutual inductor field wireless calibration instrument for 750kV substation |
| CN106842097A (en) * | 2017-02-21 | 2017-06-13 | 国网江西省电力公司电力科学研究院 | A kind of anti-DC performance detection means of current transformer and method |
-
2013
- 2013-06-04 CN CN 201320317611 patent/CN203250019U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103308879A (en) * | 2013-06-04 | 2013-09-18 | 国家电网公司 | Mutual inductor field wireless calibration instrument for 750kV substation |
| CN106842097A (en) * | 2017-02-21 | 2017-06-13 | 国网江西省电力公司电力科学研究院 | A kind of anti-DC performance detection means of current transformer and method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131023 |