CN204855583U - Transient state of accurate heavy current rises and flows generating device - Google Patents

Transient state of accurate heavy current rises and flows generating device Download PDF

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Publication number
CN204855583U
CN204855583U CN201520361526.2U CN201520361526U CN204855583U CN 204855583 U CN204855583 U CN 204855583U CN 201520361526 U CN201520361526 U CN 201520361526U CN 204855583 U CN204855583 U CN 204855583U
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China
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unit
current
transient state
transducer
power
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CN201520361526.2U
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Inventor
韩伟
石光
刘磊
孔圣立
吴春红
赵军
杨海晶
赵文沛
徐鹏煜
李雷
关延伟
马伟东
马建胜
罗海冰
孙亮
王懿
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BEIJING PONOVO POWER Co Ltd
State Grid Corp of China SGCC
Electric Power Research Institute of State Grid Henan Electric Power Co Ltd
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BEIJING PONOVO POWER Co Ltd
State Grid Corp of China SGCC
Electric Power Research Institute of State Grid Henan Electric Power Co Ltd
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Abstract

The utility model discloses a transient state of accurate heavy current rises and flows generating device, including IO input device unit, microcomputer control unit, digital signal control processing unit, DA converter, AD converter, output current acquisition unit, high -power linear current power amplifier unit and be used for for the three -phase direct current rectifying and wave -filtering power of high -power linear current power amplifier unit power supply, the utility model discloses an electric current acquisition unit gathers and measures transient state heavy current signal, is digital signal transmission by the AD converter with transient state heavy current signal conversion and gives digital signal control processing unit, handles through the operation of microcomputer control unit, obtains the amplitude and the wave form of transient state heavy current signal. Lead to the operation computing of accomplishing the transient state signal of multiple mode by the microcomputer control unit simultaneously, through the control of digital signal control processing unit to the DA converter, realize the output of transient state analog signal.

Description

A kind of transient state up-flow generating means of accurate big current
Technical field
The utility model relates to electrical power system transient technical field of measurement and test, particularly relates to a kind of transient state up-flow generating means of accurate big current.
Background technology
Along with the fast development that China's intelligent grid is built, various novel electronic current mutual inductor uses more and more in extra-high voltage electric transmission and transformation system.The electronic current mutual inductor of these principle of work method advanced persons is by the power supply current value sensing detection of electrical network supply electric system second protection and measuring apparatus.The current signal that electric system utilizes electronic current mutual inductor sensing detection once to survey comprises the steady state current signals of primary current, transient current signal and various fault-current signal, and the protection of electric system secondary side and metering outfit are through completing emergency protection and the electric energy metrical of electric system according to these current signals.
Electric mutual inductor has plurality of advantages compared with conventional electromagnetic mutual inductor, such as: electric mutual inductor has without magnetic saturation, frequency response range is wide, transient characterisitics good, insulation system simply, does not exist second open circuit or short circuit hidden danger etc.; Can export with digital signal; Instead of cable with optical cable in transmission, fundamentally solve the additive error that mutual inductor produces in electric current, voltage signal transmitting procedure; Be conducive to transformer station and realize data sharing; Higher degree automation of transformation substations demand can be met.
In order to ensure the accuracy of electric mutual inductor, guaranteeing security of system, stablizing, must test these electronic mutual inductors.But, compared with traditional mutual inductor. and electric mutual inductor there occurs basic change in the mode of measuring principle, structure and output signal, and traditional mutual inductor measuring method for testing is not suitable for electric mutual inductor.
At present to the performance test of the electronic current mutual inductor that electric system primary side uses, generally manually by the test current of the given tested current transformer of the mode of rising current transformer manual adjustments, then by the artificial secondary current being measured this current transformer by multimeter.Such test, can cause excessive personal error on the one hand, be difficult to ensure high-precision test result, be with serve potential safety hazard to experimental test personnel; The steady-state value of electronic current mutual inductor can only be tested on the other hand, the various transient characterisitics parameters of electronic current mutual inductor can not be tested.
And along with the domestic demand to electronic current mutual inductor field-checking get more and more, not only require the output current of this type of current feedback circuit can a few peace to thousands of peace on a large scale in continuously adjustabe, but also the Steady state and transient state big current of standing wave shape will be exported to according to national standard, ensure the high precision of output current, high stability simultaneously; And in order to meet the demand of on-the-spot test, ensure that this type of power volume is little, lightweight, reliability is high.But also do not meet the transient state up-flow generating means of the accurate big current of above-mentioned whole requirement at present.
Utility model content
The purpose of this utility model is to provide a kind of transient state up-flow generating means of accurate big current, can test accurately the transient characterisitics of electric system primary side electronic current mutual inductor.
The utility model adopts following technical proposals:
A transient state up-flow generating means for accurate big current, comprises IO input equipment unit, microcomputer control unit, Digital Signals processing unit, D/A transducer, A/D transducer, output current collecting unit, high-power linear current Power Amplifier Unit and the three-phase dc rectification filtering power for powering to described high-power linear current Power Amplifier Unit; Described IO input equipment unit is connected with microcomputer control unit, described microcomputer control unit is connected with Digital Signals processing unit, described Digital Signals processing unit is connected with the output terminal of described A/D transducer with the input end of described D/A transducer respectively, and the output terminal of D/A transducer is connected with the input end of described high-power linear current Power Amplifier Unit; The output terminal of high-power linear current Power Amplifier Unit is connected with the Gather and input end of output current collecting unit, and the output port of output current collecting unit connects the input end of A/D transducer.
Described three-phase dc rectification filtering power is connected with three-phase input power by three-phase isolation rectification transformer, exports to described three-phase dc rectification filtering power through isolated buck.
Described Digital Signals processing unit is made up of high-speed dsp and FPGA.
Described IO input equipment unit is made up of industrial computer, keyboard, display, USB interface and network interface, and described keyboard, display, USB interface are connected with industrial computer respectively with network interface.
Described microcomputer control unit is made up of industrial computer, Desktop PC, notebook computer and CPU.
The transient state simulating signal that described high-power linear current Power Amplifier Unit is used for being controlled by described Digital Signals processing unit to export through described D/A transducer conversion is amplified, there is transient heavy current and export to load, the transient heavy current signal exported is measured through described output current collecting unit collection and is transformed to digital quantity through described A/D transducer, calculate through described Digital Signals processing unit and described microcomputer control unit and control, output display transient current waveform and amplitude.
Described microcomputer control unit, for the treatment of the input and output of more than described keyboard, display, USB port, network interface each I/O device unit signal instruction and run relative application software instrument and produce transient current digital controlled signal needed for device, control described Digital Signals processing unit and export corresponding transient state simulating signal by described D/A transducer conversion.
The utility model measures transient heavy current signal by the collection of current acquisition unit, by A/D transducer, transient heavy current signal is transformed to digital data transmission to Digital Signals processing unit, run process through microcomputer control unit, obtain amplitude and the waveform of transient heavy current signal.Simultaneously by running parameter setting and the control operation of the I/O device unit finishing devices such as keyboard, display, USB port, network interface, the moving calculation process of the transient signal of various ways is completed by microcomputer control unit, through the control of Digital Signals processing unit to D/A transducer, realize transient state analog signal output.The accurate transient heavy current waveform distortion produced by device of the present utility model and method for generation is little, bandwidth, and response is fast.The state current amplitude exported and waveform can be presented at display screen by microcomputer control unit in real time, and are stored in external equipment by I/O port.Multiple transient signal method for generation is convenient to the integration test tested the transient characterisitics of electric system primary electron formula current transformer.
Accompanying drawing explanation
Fig. 1 is structural principle block diagram of the present utility model.
Embodiment
A transient state up-flow generating means for accurate big current as shown in Figure 1, comprises IO input equipment unit, microcomputer control unit, Digital Signals processing unit, D/A transducer, A/D transducer, output current collecting unit, high-power linear current Power Amplifier Unit and the three-phase dc rectification filtering power for powering to described high-power linear current Power Amplifier Unit; Described IO input equipment unit is connected with microcomputer control unit, described microcomputer control unit is connected with Digital Signals processing unit, described Digital Signals processing unit is connected with the output terminal of described A/D transducer with the input end of described D/A transducer respectively, and the output terminal of D/A transducer is connected with the input end of described high-power linear current Power Amplifier Unit; The output terminal of high-power linear current Power Amplifier Unit is connected with the Gather and input end of output current collecting unit, and the output port of output current collecting unit connects the input end of A/D transducer.
Described three-phase dc rectification filtering power is connected with three-phase input power by three-phase isolation rectification transformer, exports to described three-phase dc rectification filtering power through isolated buck.Described Digital Signals processing unit is made up of high-speed dsp and FPGA.
Described IO input equipment unit comprises and being made up of industrial computer, keyboard, display, USB interface and network interface, and described keyboard, display, USB interface are connected with industrial computer respectively with network interface.The peripheral I/O devices of unit, mainly completes the output to the input of the optimum configurations of the utility model device and test data, figure, report.Described microcomputer control unit is primarily of CPU compositions such as industrial computer, Desktop PC, notebook computers.
The transient state simulating signal that described high-power linear current Power Amplifier Unit is used for being controlled by described Digital Signals processing unit to export through the conversion of D/A transducer is amplified, there is transient heavy current and export to load, the transient heavy current signal exported is measured through described output current collecting unit collection and is transformed to digital quantity through described A/D transducer, calculates control output display transient current waveform and amplitude through described Digital Signals processing unit and described microcomputer control unit.
Described microcomputer control unit, for the treatment of the I/O device unit input and output such as described keyboard, display, USB port, network interface signal instruction and run relative application software instrument and produce transient current digital controlled signal needed for device, control described Digital Signals processing unit, the transient state simulating signal of the correspondence exported by described D/A transducer conversion.
Below the principle of work of accurate big current transient state up-flow device of the present utility model is summarized as follows:
The utility model is completed by three-phase isolation rectification transformer isolates the step-down of input power, direct supply is exported to high-power linear current Power Amplifier Unit through three-phase dc rectification filtering power rectifying and wave-filtering, the transient current signal that D/A transducer inputs is carried out power amplification by high-power linear current Power Amplifier Unit, exports transient heavy current power signal and tests to tested device.
In device, output current collecting unit is connected with the output of high-power linear current Power Amplifier Unit, gather and measure transient heavy current signal, output current collecting unit is connected with A/D transducer, by A/D transducer, transient heavy current signal is transformed to digital data transmission to Digital Signals processing unit, process is run through microcomputer control unit, obtain amplitude and the waveform of transient heavy current signal, the amplitude of described transient heavy current signal and waveform are through I/O device unit display translation such as keyboard, display, USB port, network interfaces.Simultaneously by running parameter setting and the control operation of the I/O device unit finishing devices such as keyboard, display, USB port, network interface, the moving calculation process of the transient signal of various ways is completed by microcomputer control unit, through the control of Digital Signals processing unit to D/A transducer, realize transient state analog signal output.Wherein the moving calculation of the transient signal of various ways is treated to known technology in field, and illustrating no longer one by one at this repeats.

Claims (7)

1. a transient state up-flow generating means for accurate big current, is characterized in that: comprise IO input equipment unit, microcomputer control unit, Digital Signals processing unit, D/A transducer, A/D transducer, output current collecting unit, high-power linear current Power Amplifier Unit and the three-phase dc rectification filtering power for powering to described high-power linear current Power Amplifier Unit; Described IO input equipment unit is connected with microcomputer control unit, described microcomputer control unit is connected with Digital Signals processing unit, described Digital Signals processing unit is connected with the output terminal of described A/D transducer with the input end of described D/A transducer respectively, and the output terminal of D/A transducer is connected with the input end of described high-power linear current Power Amplifier Unit; The output terminal of high-power linear current Power Amplifier Unit is connected with the Gather and input end of output current collecting unit, and the output port of output current collecting unit connects the input end of A/D transducer.
2. the transient state up-flow generating means of accurate big current according to claim 1, it is characterized in that: described three-phase dc rectification filtering power is connected with three-phase input power by three-phase isolation rectification transformer, exports to described three-phase dc rectification filtering power through isolated buck.
3. the transient state up-flow generating means of accurate big current according to claim 2, is characterized in that: described Digital Signals processing unit is made up of high-speed dsp and FPGA.
4. the transient state up-flow generating means of accurate big current according to claim 3, it is characterized in that: described IO input equipment unit is made up of industrial computer, keyboard, display, USB interface and network interface, and described keyboard, display, USB interface are connected with industrial computer respectively with network interface.
5. the transient state up-flow generating means of accurate big current according to claim 4, is characterized in that: described microcomputer control unit is made up of industrial computer, Desktop PC, notebook computer and CPU.
6. the transient state up-flow generating means of accurate big current according to claim 5, it is characterized in that: the transient state simulating signal that described high-power linear current Power Amplifier Unit is used for being controlled by described Digital Signals processing unit to export through described D/A transducer conversion is amplified, there is transient heavy current and export to load, the transient heavy current signal exported is measured through described output current collecting unit collection and is transformed to digital quantity through described A/D transducer, calculate through described Digital Signals processing unit and described microcomputer control unit and control, output display transient current waveform and amplitude.
7. the transient state up-flow generating means of accurate big current according to claim 6, it is characterized in that: described microcomputer control unit, for the treatment of the input and output of more than described keyboard, display, USB port, network interface each I/O device unit signal instruction and run relative application software instrument and produce transient current digital controlled signal needed for device, control described Digital Signals processing unit and export corresponding transient state simulating signal by described D/A transducer conversion.
CN201520361526.2U 2015-05-29 2015-05-29 Transient state of accurate heavy current rises and flows generating device Active CN204855583U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104865427A (en) * 2015-05-29 2015-08-26 国网河南省电力公司电力科学研究院 Precise high-current transient current rise generating device
CN109557495A (en) * 2018-12-21 2019-04-02 中国电力科学研究院有限公司 For the transient characterisitics method of calibration of DC current associated loop, system, device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104865427A (en) * 2015-05-29 2015-08-26 国网河南省电力公司电力科学研究院 Precise high-current transient current rise generating device
CN104865427B (en) * 2015-05-29 2018-02-16 国网河南省电力公司电力科学研究院 A kind of transient state up-flow generating means of accurate high current
CN109557495A (en) * 2018-12-21 2019-04-02 中国电力科学研究院有限公司 For the transient characterisitics method of calibration of DC current associated loop, system, device

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