CN104535952A - Electricity use detection tester and allopatric wireless synchronous waveform sampling method thereof - Google Patents

Electricity use detection tester and allopatric wireless synchronous waveform sampling method thereof Download PDF

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Publication number
CN104535952A
CN104535952A CN201510013801.6A CN201510013801A CN104535952A CN 104535952 A CN104535952 A CN 104535952A CN 201510013801 A CN201510013801 A CN 201510013801A CN 104535952 A CN104535952 A CN 104535952A
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CN
China
Prior art keywords
wireless
described
mcu
main frame
phase
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CN201510013801.6A
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Chinese (zh)
Inventor
张宝军
董生怀
闫章勇
成安远
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郑州万特电气股份有限公司
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Priority to CN201510013801.6A priority Critical patent/CN104535952A/en
Publication of CN104535952A publication Critical patent/CN104535952A/en

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Abstract

The invention provides an electricity use detection tester and an allopatric wireless synchronous waveform sampling method of the tester. The electricity use detection tester comprises a host and a wireless sampling device, the host is used for meter tail voltage, current, phase and waveform collection, and the wireless sampling device is used for secondary side voltage, current, phase and waveform collection of a PT mutual inductor or a CT mutual inductor. The host comprises a host MCU, a primary wireless synchronous module and a first secondary wireless synchronous module, and the wireless sampling device comprises a wireless sampling device MCU and a second secondary wireless synchronous module. The allopatric wireless synchronous waveform sampling method includes the first step that a synchronous signal is generated, the second step that the host MCU and the wireless sampling device MCU receive the synchronous signal, the third step that the host MCU and the wireless sampling device MCU receive sample the waveform of the synchronous signal, the fourth step that the host MCU and the wireless sampling device MCU obtain the initial phase of voltage and the initial phase of current, and the fifth step that the host MCU analyzes an obtained in-phase signal.

Description

A kind of power utility check tester and strange land wireless synchronization waveform sampling method thereof

Technical field

The present invention relates to high for directional error field tests, specifically, relate to a kind of power utility check tester and strange land wireless synchronization waveform sampling method thereof.

Background technology

Carrying out in the process of site error test to massive quantity power supply and measurement and height for low meter measuring apparatus, due to measurement meter distance CT mutual inductor and PT mutual inductor far away, the reference often cannot carrying out the table tail wiring verifying measurement meter is separate, and this makes the judgement of his-and-hers watches tail wiring create a lot of uncertainties.To obtain signal from PT mutual inductor or CT mutual inductor, conventional method uses wired methods.Wired methods due to reasons such as line losses, make to wire rod to choose requirement higher, and winding displacement can bring very large trouble to site operation.

How to address this problem, all there is no good solution in the industry all the time.

Summary of the invention

The object of the invention is for the deficiencies in the prior art, the power utility check tester that a kind of structure is simple, easy to use is provided; The present invention also provides the strange land wireless synchronization waveform sampling method of this power utility check tester.

To achieve these goals, the technical solution adopted in the present invention is: a kind of power utility check tester, it comprises main frame for showing tail voltage current phase waveform acquisition and the wireless sampling thief for PT mutual inductor or CT mutual inductor secondary side voltage current phase waveform acquisition, described main frame comprises main frame MCU, main wireless synchronization module and first from wireless synchronization module, and described wireless sampling thief comprises wireless sampling thief MCU and second from wireless synchronization module;

Described main wireless synchronization module, connects described main frame MCU, in order to produce synchronizing signal;

Described first from wireless synchronization module, receives described synchronizing signal, and is sent to described main frame MCU;

Described second from wireless synchronization module, receives described synchronizing signal, and is sent to described wireless sampling thief MCU;

Described wireless sampling thief MCU, analyzes the first phase that described synchronizing signal obtains the second voltage and current, and analysis result is sent to described main frame MCU by described second from wireless synchronization module;

Described main frame MCU, analyzes the first phase that described synchronizing signal obtains the first voltage and current, the first phase of comparison first voltage and current and the first phase of the second voltage and current, obtains in-phase signal when the two amplitude-phase is identical.

Based on above-mentioned, described main frame MCU and described wireless sampling thief all adopt ADE7878 to measure chip.

A strange land wireless synchronization waveform sampling method for tester is looked in electric-examination, and the method comprises the following steps:

Step 1: described main frame MCU controls described main wireless synchronization module and produces synchronizing signal;

Step 2: described main wireless synchronization module is sent to first from wireless synchronization module and second from wireless synchronization module by after described synchronizing signal modulation, the synchronizing signal received is outputted to main frame MCU from wireless synchronization module by described first, and the synchronizing signal received is outputted to described wireless sampling thief MCU from wireless synchronization module by described second;

Step 3: described main frame MCU and described wireless sampling thief MCU carries out the waveform sampling in N number of tested cycle respectively to the synchronizing signal received;

Step 4: described main frame MCU and described wireless sampling thief MCU carries out waveform frequency district characteristic analysis to waveform respectively, obtains the first phase of voltage and current;

Step 5: its analysis result is sent to described main frame MCU by second from wireless synchronization module by described wireless sampling thief MCU, described main frame MCU, to the amplitude-phase combined analysis of two analysis results, obtains in-phase signal when amplitude-phase is identical.

Hinge structure of the present invention has outstanding substantive distinguishing features and marked improvement, specifically, the present invention is by arranging main wireless synchronization module and two from wireless synchronization module, and adopt the method for wireless waveform sampling, solve and to table tail, the problem of sync waveform sampling is carried out to PT mutual inductor or CT mutual inductor.In the present invention, tester structure is simple, easy to use, and waveform sampling method error is little.

Accompanying drawing explanation

Fig. 1 is structure block diagram of the present invention.

Fig. 2 is the sync waveform sampling time sequence figure of the inventive method.

Embodiment

Below by embodiment, technical scheme of the present invention is described in further detail.

As shown in Figure 1, a kind of power utility check tester, it comprises main frame for showing tail voltage current phase waveform acquisition and the wireless sampling thief for PT mutual inductor or CT mutual inductor secondary side voltage current phase waveform acquisition, described main frame comprises main frame MCU, main wireless synchronization module and first from wireless synchronization module, and described wireless sampling thief comprises wireless sampling thief MCU and second from wireless synchronization module.

Described main wireless synchronization module, connects described main frame MCU, in order to produce synchronizing signal; Described first from wireless synchronization module, receives described synchronizing signal, and is sent to described main frame MCU; Described second from wireless synchronization module, receives described synchronizing signal, and is sent to described wireless sampling thief MCU; Described wireless sampling thief MCU, analyzes the first phase that described synchronizing signal obtains the second voltage and current, and analysis result is sent to described main frame MCU by described second from wireless synchronization module; Described main frame MCU, analyzes the first phase that described synchronizing signal obtains the first voltage and current, the first phase of comparison first voltage and current and the first phase of the second voltage and current, obtains in-phase signal when the two amplitude-phase is identical.

Based on above-mentioned, described main frame MCU and described wireless sampling thief MCU all adopts ADE7878 to measure chip.

The concrete steps flow process of the strange land wireless synchronization waveform sampling method of this power utility check tester is as follows:

Step 1: described main frame MCU produces synchronizing signal by wireless synchronization module main described in IO port controlling;

Step 2: described main wireless synchronization module utilizes the mode of broadcast to be sent to first from wireless synchronization module and second from wireless synchronization module by after described synchronizing signal modulation, the synchronizing signal received is outputted to main frame MCU from wireless synchronization module by described first, and the synchronizing signal received is outputted to described wireless sampling thief MCU from wireless synchronization module by described second.

Step 3: described main frame MCU and described wireless sampling thief MCU adopts timer capture pattern to carry out the waveform sampling in N number of tested cycle to the synchronizing signal received respectively.

Step 4: described main frame MCU and described wireless sampling thief MCU carries out Lagrange's interpolation to waveform, Fast Fourier Transform (FFT) respectively, obtains waveform frequency domain characteristic, then obtains the first phase of voltage and current.

Step 5: its analysis result is sent to described main frame MCU by second from wireless synchronization module by described wireless sampling thief MCU, described main frame MCU is to the amplitude-phase combined analysis of two analysis results, obtain the circuit relation of table tail and PT mutual inductor or CT mutual inductor secondary side, obtain in-phase signal when amplitude-phase is identical.

To massive quantity power supply and measurement and high carry out adopting in the process of site error test the inventive method to carry out the table tail wiring verifying measurement meter separate for low meter measuring apparatus time, accessible index: accessible 200 meters of wireless communication distance sighting distance, error criterion: locking phase is measured gap and is less than 0.2 °.

As the sync waveform sampling time sequence figure that Fig. 2 is the inventive method, wherein, as shown in FIG.: T1, main wireless synchronization module is to first from the time delay of wireless synchronization module; T2, main wireless synchronization module is to second from the time delay of wireless synchronization module; T3, the time of synchronizing signal first waveform sampling point in main frame MCU; T4, from machine synchronizing signal to the time of ADE first waveform sampling point; S1, the synchronizing signal that main wireless synchronization module receives; S2, the synchronizing signal that main frame MCU receives; First waveform sampling point of S3, main frame MCU; S4, the second synchronizing signal received from wireless synchronization module; First waveform sampling point of S5, wireless sampling thief MCU; A waveform sampling point of Sn, main frame MCU; A waveform sampling point of Sm, wireless sampling thief MCU; The sequential of 125us, ADE chip high speed sampling.

As seen from the figure, the time absolute growth of T1, T2 is little on the inventive method impact, but its time difference is larger to accessible Index Influence.In reality test, in accessible 200 meters of radio communication, the mistiming controls within 0.8us.

The time absolute value of T3, T4 and difference do not affect the inventive method, but its flutter catch and accurately calculate its value on error criterion impact larger.This power utility check tester flutters by timer the method for catching can calculate the time accurately.Control within error criterion scope by making final wireless synchronization waveform sampling method to the accurate Calculation of T1, T2, T3, T4.

Finally should be noted that: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit; Although with reference to preferred embodiment to invention has been detailed description, those of ordinary skill in the field are to be understood that: still can modify to the specific embodiment of the present invention or carry out equivalent replacement to portion of techniques feature; And not departing from the spirit of technical solution of the present invention, it all should be encompassed in the middle of the technical scheme scope of request of the present invention protection.

Claims (3)

1. a power utility check tester, it is characterized in that: it comprises main frame for showing tail voltage current phase waveform acquisition and the wireless sampling thief for PT mutual inductor or CT mutual inductor secondary side voltage current phase waveform acquisition, described main frame comprises main frame MCU, main wireless synchronization module and first from wireless synchronization module, and described wireless sampling thief comprises wireless sampling thief MCU and second from wireless synchronization module;
Described main wireless synchronization module, connects described main frame MCU, in order to produce synchronizing signal;
Described first from wireless synchronization module, receives described synchronizing signal, and is sent to described main frame MCU;
Described second from wireless synchronization module, receives described synchronizing signal, and is sent to described wireless sampling thief MCU;
Described wireless sampling thief MCU, analyzes the first phase that described synchronizing signal obtains the second voltage and current, and analysis result is sent to described main frame MCU by described second from wireless synchronization module;
Described main frame MCU, analyzes the first phase that described synchronizing signal obtains the first voltage and current, the first phase of comparison first voltage and current and the first phase of the second voltage and current, obtains in-phase signal when the two amplitude-phase is identical.
2. power utility check tester according to claim 1, is characterized in that: described main frame MCU and described wireless sampling thief all adopt ADE7878 to measure chip.
3. a strange land wireless synchronization waveform sampling method for power utility check tester described in claim 1 or 2, is characterized in that: the method comprises the following steps:
Step 1: described main frame MCU controls described main wireless synchronization module and produces synchronizing signal;
Step 2: described main wireless synchronization module is sent to first from wireless synchronization module and second from wireless synchronization module by after described synchronizing signal modulation, the synchronizing signal received is outputted to main frame MCU from wireless synchronization module by described first, and the synchronizing signal received is outputted to described wireless sampling thief MCU from wireless synchronization module by described second;
Step 3: described main frame MCU and described wireless sampling thief MCU carries out the waveform sampling in N number of tested cycle respectively to the synchronizing signal received;
Step 4: described main frame MCU and described wireless sampling thief MCU carries out waveform frequency district characteristic analysis to waveform respectively, obtains the first phase of voltage and current;
Step 5: its analysis result is sent to described main frame MCU by second from wireless synchronization module by described wireless sampling thief MCU, described main frame MCU, to the amplitude-phase combined analysis of two analysis results, obtains in-phase signal when amplitude-phase is identical.
CN201510013801.6A 2015-01-12 2015-01-12 Electricity use detection tester and allopatric wireless synchronous waveform sampling method thereof CN104535952A (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080097706A1 (en) * 2004-06-04 2008-04-24 Mccormack Michael Anthony Method of Monitoring Line Faults in a Medium Voltage Network
CN201402287Y (en) * 2009-04-03 2010-02-10 江苏省电力公司苏州供电公司 Voltage drop detecting device of secondary circuit of voltage transformer
CN201438201U (en) * 2009-04-03 2010-04-14 江苏省电力公司苏州供电公司 Secondary loop circuit voltage drop synchronous detection device for voltage mutual inductor
CN102608392A (en) * 2012-03-22 2012-07-25 上海市电力公司 MOA (metal oxide arrester) resistive current detection system
CN204065388U (en) * 2014-03-28 2014-12-31 云南电力试验研究院(集团)有限公司电力研究院 A kind of Secondary Circuit of Potential Transformer pressure drop wireless detection device
CN204575835U (en) * 2015-01-12 2015-08-19 郑州万特电气股份有限公司 A kind of power utility check tester

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080097706A1 (en) * 2004-06-04 2008-04-24 Mccormack Michael Anthony Method of Monitoring Line Faults in a Medium Voltage Network
CN201402287Y (en) * 2009-04-03 2010-02-10 江苏省电力公司苏州供电公司 Voltage drop detecting device of secondary circuit of voltage transformer
CN201438201U (en) * 2009-04-03 2010-04-14 江苏省电力公司苏州供电公司 Secondary loop circuit voltage drop synchronous detection device for voltage mutual inductor
CN102608392A (en) * 2012-03-22 2012-07-25 上海市电力公司 MOA (metal oxide arrester) resistive current detection system
CN204065388U (en) * 2014-03-28 2014-12-31 云南电力试验研究院(集团)有限公司电力研究院 A kind of Secondary Circuit of Potential Transformer pressure drop wireless detection device
CN204575835U (en) * 2015-01-12 2015-08-19 郑州万特电气股份有限公司 A kind of power utility check tester

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