CN101587143A - CT charge on-line detection device and detection method - Google Patents

CT charge on-line detection device and detection method Download PDF

Info

Publication number
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
Authority
CN
China
Prior art keywords
single chip
scm
chip microcomputer
sampling circuit
current
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CNA2009103036644A
Other languages
Chinese (zh)
Inventor
王振铎
张名
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
FUJIAN STELCOM Co Ltd
Original Assignee
FUJIAN STELCOM Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by FUJIAN STELCOM Co Ltd filed Critical FUJIAN STELCOM Co Ltd
Priority to CNA2009103036644A priority Critical patent/CN101587143A/en
Publication of CN101587143A publication Critical patent/CN101587143A/en
Pending legal-status Critical Current

Links

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

CT charge on-line detection device and detection method
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.
CNA2009103036644A 2009-06-25 2009-06-25 CT charge on-line detection device and detection method Pending CN101587143A (en)

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

Applications Claiming Priority (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

Publications (1)

Publication Number Publication Date
CN101587143A true CN101587143A (en) 2009-11-25

Family

ID=41371473

Family Applications (1)

Application Number Title Priority Date Filing Date
CNA2009103036644A Pending CN101587143A (en) 2009-06-25 2009-06-25 CT charge on-line detection device and detection method

Country Status (1)

Country Link
CN (1) CN101587143A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
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

Cited By (4)

* Cited by examiner, † Cited by third party
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

Similar Documents

Publication Publication Date Title
CN103424732B (en) A kind of direct-current electric energy meter calibrating device
CN102508035B (en) Fuel cell AC impedance on-line testing system and measuring and controlling method
CN103149546B (en) The field integrated tester of a kind of portable electric energy measuring terminal
CN101625383A (en) On-line monitoring device for power quality
CN102385047A (en) Charging post direct-current electric energy meter calibrating device
CN103176066B (en) Digitalized electric energy quality monitoring device
CN201255662Y (en) Virtual acoustic noise tester for wind-driven generator group
CN202815125U (en) State monitoring device for power transformer
CN203658453U (en) Wireless secondary voltage-drop and load tester provided with wireless synchronous communication function
CN101587143A (en) CT charge on-line detection device and detection method
CN202256659U (en) Charging pile direct-current electric energy meter calibration device
CN105866576A (en) Simulation detection system of intelligent transformer station secondary-side electric energy metering error influence, and detection analysis method
CN203178477U (en) Automatic detection device for reliability of intelligent electric energy meter
CN103197276A (en) Reliability automatic detecting device of intelligent energy meter
CN204679622U (en) With the three-phase intelligent electric-energy meter communication interface load capacity proving installation of communication module
CN109856588A (en) It is a kind of to meet on-line testing process energy data lossless digital DC electric energy meter and field calibration system
CN203241371U (en) Portable multi-index impedance biosensor device
CN101452638B (en) Electrical energy meter or power load administrative terminal verifying device
CN101609135A (en) PT charge on-line detection device and detection method
CN203881861U (en) Multifunctional power grounding parameter tester
CN203275513U (en) Radio frequency power meter
CN203849331U (en) Handheld standing-wave ratio detector
CN203720323U (en) Portable three-phase asynchronous motor operational parameter tester
CN206058911U (en) Neutron flux monitoring instrument
CN202916335U (en) Three-phase current meter based on single-phase metering chip

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C12 Rejection of a patent application after its publication
RJ01 Rejection of invention patent application after publication

Open date: 20091125