CN101587143A - CT charge on-line detection device and detection method - Google Patents
CT charge on-line detection device and detection method Download PDFInfo
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- CN101587143A CN101587143A CNA2009103036644A CN200910303664A CN101587143A CN 101587143 A CN101587143 A CN 101587143A CN A2009103036644 A CNA2009103036644 A CN A2009103036644A CN 200910303664 A CN200910303664 A CN 200910303664A CN 101587143 A CN101587143 A CN 101587143A
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- 238000001514 detection method Methods 0.000 title claims abstract description 22
- 238000005070 sampling Methods 0.000 claims abstract description 25
- 230000000875 corresponding Effects 0.000 claims abstract description 10
- 238000004891 communication Methods 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 238000004458 analytical method Methods 0.000 claims description 4
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- 238000010998 test method Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 4
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- 238000005516 engineering process Methods 0.000 description 1
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Abstract
This invention relates to the technical field of electric signal test, especially a CT charge on-line detection device and detection method. The detection device includes a micro-voltage sampling circuit and a current sampling circuit for collecting voltage and current signals at CT secondary side, a single chip computer system and a handle movable terminal. The micro-voltage sampling circuit, the current sampling circuit are connected with the single chip computer, respectively. The single chip computer system is connected with the handle movable terminal via a wireless communication mode. The detection method includes following steps: collecting a voltage signal and a current signal at CT secondary side, processing and converting corresponding signal; the micro-voltage sampling circuit and current sampling circuit transporting the collected and processed voltage, current signals to the single chip computer system; the signal chip computer system obtaining a secondary charge and whole electric parameters after analyzing and calculating, and transporting to the handle movable terminal to display. The detection device and method is in favor of quickly and accurately measuring the CT secondary charge in online.
Description
Technical field
The present invention relates to the electric signal technical field of measurement and test, particularly a kind of CT charge on-line detection device and detection method.
Background technology
Along with China Power moves towards market, the accuracy of electric energy metrical comes into one's own day by day, and the error of current transformer (CT) is to influence an accurately key factor of metering of electric energy.Theoretical analysis shows: the error of CT is directly proportional with its secondary load.Traditional transformer error method of testing generally is under nominal load CT to be detected, and can not truly be reflected in the actual error value under the actual load ruuning situation.In order to guarantee the accurate operation of CT, the load of CT is within the specified upper lower limit value scope of regulation.Because the CT secondary voltage is very little, for the actual load test has brought certain difficulty, in addition, must be in test to system blackout, and need just to finish by means of current source, voltage source, mutual-inductor tester etc. the secondary actual load test of CT, experimentation complexity, test duration are long.
Summary of the invention
The object of the present invention is to provide a kind of CT charge on-line detection device and detection method, this pick-up unit and method help quickly and accurately the CT secondary load being carried out on-line measurement.
The object of the present invention is achieved like this: this CT charge on-line detection device, it is characterized in that: comprise the micro voltage sample circuit, current sampling circuit, Single Chip Microcomputer (SCM) system and hand-held mobile terminal, described micro voltage sample circuit comprises the micro voltage sample circuit, signal amplification circuit and AD analog to digital conversion circuit, described micro voltage sample circuit is connected with the CT secondary side, to gather secondary side micro voltage signal and to carry out corresponding signal process, described current sampling circuit comprises forcipated mutual-inductor, signal processing circuit and AD analog to digital conversion circuit, described forcipated mutual-inductor is connected with the CT secondary side, to gather the secondary side current signal and to carry out corresponding signal process; Described micro voltage sample circuit, current sampling circuit are connected with Single Chip Microcomputer (SCM) system respectively, are transferred to Single Chip Microcomputer (SCM) system with voltage, the current signal that will gather and handle, and described Single Chip Microcomputer (SCM) system is connected with hand-held mobile terminal by wireless communication mode.
The detection method of this CT charge on-line detection device correspondence is characterized in that: carry out the online detection of CT load by the cooperating of micro voltage sample circuit, current sampling circuit, Single Chip Microcomputer (SCM) system and hand-held mobile terminal, comprise following steps:
(1) gathers the voltage and current signal of CT secondary side by micro voltage sample circuit and current sampling circuit respectively, and carry out corresponding signal process, conversion;
(2) micro voltage sample circuit and current sampling circuit voltage, the current signal that will gather and handle is transferred to Single Chip Microcomputer (SCM) system;
(3) Single Chip Microcomputer (SCM) system is according to the voltage that receives, voltage, electric current, phase place and the frequency that the current signal analysis obtains the CT secondary side, and active power, reactive power, applied power and power factor (PF) by calculating secondary side.
(4) Single Chip Microcomputer (SCM) system is transferred to hand-held mobile terminal with CT secondary load and whole electric parameter, and shows on hand-held mobile terminal.
Distinguishing feature of the present invention is to finish the on-line measurement of CT secondary load, and test speed is fast, accuracy is high, for on-the-spot test has brought very big convenience.Simultaneously, adopt bluetooth communication mode and PDA to carry out data interaction, safety easy to use and test data can be preserved.The present invention is except can testing the CT secondary load, can also test whole electric parameters (voltage, electric current, phase place, frequency, meritorious, idle, applied power, power factor (PF) etc.), therefore can replace pincerlike phase meter of high precision and single-phase electric parameter measurement instrument to use again.
The present invention is described in further detail below in conjunction with drawings and the specific embodiments.
Description of drawings
Fig. 1 is the theory diagram of the embodiment of the invention.
Fig. 2 is the hardware principle block diagram of the micro voltage sample circuit of the embodiment of the invention.
Fig. 3 is the hardware principle block diagram of the current sampling circuit of the embodiment of the invention.
Fig. 4 is that the Single Chip Microcomputer (SCM) system of the embodiment of the invention is carried out the software control flow chart that CT voltage, CT current channel phase alignment and electric parameter are gathered computing.
Embodiment
CT charge on-line detection device of the present invention comprises micro voltage sample circuit, current sampling circuit, Single Chip Microcomputer (SCM) system and hand-held mobile terminal as shown in Figure 1.Shown in Fig. 2,3, described micro voltage sample circuit comprises micro voltage sample circuit, signal amplification circuit and AD analog to digital conversion circuit, described micro voltage sample circuit is connected with the CT secondary side, to gather secondary side micro voltage signal and to carry out corresponding signal process, described current sampling circuit comprises forcipated mutual-inductor, signal processing circuit and AD analog to digital conversion circuit, described forcipated mutual-inductor is connected with the CT secondary side, to gather the secondary side current signal and to carry out corresponding signal process; Described micro voltage sample circuit, current sampling circuit are connected with Single Chip Microcomputer (SCM) system respectively, be transferred to Single Chip Microcomputer (SCM) system with voltage, the current signal that will gather and handle, and the control command of accepting to pass under the Single Chip Microcomputer (SCM) system, wherein the switching of voltage range is all finished under Single-chip Controlling automatically.Described Single Chip Microcomputer (SCM) system is mutual by be connected with the hand-held mobile terminal line data of going forward side by side of bluetooth communication mode.
The CT load online test method of this pick-up unit correspondence is carried out the online detection of CT load by the cooperating of micro voltage sample circuit, current sampling circuit, Single Chip Microcomputer (SCM) system and hand-held mobile terminal, and this method comprises following steps:
(1) gathers the voltage and current signal of CT secondary side by micro voltage sample circuit and current sampling circuit respectively, and carry out corresponding signal process, conversion;
(2) micro voltage sample circuit and current sampling circuit voltage, the current signal that will gather and handle is transferred to Single Chip Microcomputer (SCM) system;
(3) Single Chip Microcomputer (SCM) system is according to the voltage that receives, voltage, electric current, phase place and the frequency that the current signal analysis obtains the CT secondary side, and active power, reactive power, applied power and power factor (PF) by calculating secondary side.
(4) Single Chip Microcomputer (SCM) system is transferred to hand-held mobile terminal with CT secondary load and whole electric parameter, and shows on hand-held mobile terminal.
In order accurately to detect CT load active power, adopt scm software control CT voltage, CT current channel phase alignment, electric parameter to gather computing, the software control procedure block diagram is shown in 4.
More than be preferred embodiment of the present invention, all changes of doing according to technical solution of the present invention when the function that is produced does not exceed the scope of technical solution of the present invention, all belong to protection scope of the present invention.
Claims (3)
1. CT charge on-line detection device, it is characterized in that: comprise the micro voltage sample circuit, current sampling circuit, Single Chip Microcomputer (SCM) system and hand-held mobile terminal, described micro voltage sample circuit comprises the micro voltage sample circuit, signal amplification circuit and AD analog to digital conversion circuit, described micro voltage sample circuit is connected with the CT secondary side, to gather secondary side micro voltage signal and to carry out corresponding signal process, described current sampling circuit comprises forcipated mutual-inductor, signal processing circuit and AD analog to digital conversion circuit, described forcipated mutual-inductor is connected with the CT secondary side, to gather the secondary side current signal and to carry out corresponding signal process; Described micro voltage sample circuit, current sampling circuit are connected with Single Chip Microcomputer (SCM) system respectively, are transferred to Single Chip Microcomputer (SCM) system with voltage, the current signal that will gather and handle, and described Single Chip Microcomputer (SCM) system is connected with hand-held mobile terminal by wireless communication mode.
2. CT charge on-line detection device according to claim 1 is characterized in that: described Single Chip Microcomputer (SCM) system is mutual by be connected with the hand-held mobile terminal line data of going forward side by side of bluetooth communication mode.
3. CT load online test method is characterized in that: carry out the online detection of CT load by the cooperating of micro voltage sample circuit, current sampling circuit, Single Chip Microcomputer (SCM) system and hand-held mobile terminal, comprise following steps:
(1) gathers the voltage and current signal of CT secondary side by micro voltage sample circuit and current sampling circuit respectively, and carry out corresponding signal process, conversion;
(2) micro voltage sample circuit and current sampling circuit voltage, the current signal that will gather and handle is transferred to Single Chip Microcomputer (SCM) system;
(3) Single Chip Microcomputer (SCM) system is according to the voltage that receives, voltage, electric current, phase place and the frequency that the current signal analysis obtains the CT secondary side, and active power, reactive power, applied power and power factor (PF) by calculating secondary side.
(4) Single Chip Microcomputer (SCM) system is transferred to hand-held mobile terminal with CT secondary load and whole electric parameter, and shows on hand-held mobile terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009103036644A CN101587143A (en) | 2009-06-25 | 2009-06-25 | CT charge on-line detection device and detection method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009103036644A CN101587143A (en) | 2009-06-25 | 2009-06-25 | CT charge on-line detection device and detection method |
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| Publication Number | Publication Date |
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| CN101587143A true CN101587143A (en) | 2009-11-25 |
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| CNA2009103036644A Pending CN101587143A (en) | 2009-06-25 | 2009-06-25 | CT charge on-line detection device and detection method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103267888A (en) * | 2013-04-21 | 2013-08-28 | 国家电网公司 | Multifunctional secondary voltage and current comprehensive measurement and analysis device |
| CN104880598A (en) * | 2015-06-17 | 2015-09-02 | 江苏省电力公司苏州供电公司 | Induced current monitor for cable sheath |
| CN110763880A (en) * | 2019-12-05 | 2020-02-07 | 国网天津市电力公司 | Variable-caliber multifunctional high-voltage test clamp |
-
2009
- 2009-06-25 CN CNA2009103036644A patent/CN101587143A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103267888A (en) * | 2013-04-21 | 2013-08-28 | 国家电网公司 | Multifunctional secondary voltage and current comprehensive measurement and analysis device |
| CN103267888B (en) * | 2013-04-21 | 2017-02-08 | 国家电网公司 | Multifunctional secondary voltage and current comprehensive measurement and analysis device |
| CN104880598A (en) * | 2015-06-17 | 2015-09-02 | 江苏省电力公司苏州供电公司 | Induced current monitor for cable sheath |
| CN110763880A (en) * | 2019-12-05 | 2020-02-07 | 国网天津市电力公司 | Variable-caliber multifunctional high-voltage test clamp |
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Open date: 20091125 |