CN105044640B - A kind of integrated form controllable local discharge instrument pulse signal generator - Google Patents
A kind of integrated form controllable local discharge instrument pulse signal generator Download PDFInfo
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- CN105044640B CN105044640B CN201510362808.9A CN201510362808A CN105044640B CN 105044640 B CN105044640 B CN 105044640B CN 201510362808 A CN201510362808 A CN 201510362808A CN 105044640 B CN105044640 B CN 105044640B
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Abstract
A kind of integrated form controllable local discharge instrument pulse signal generator, including programmable voltage waveform generator S, D/A signal adapter T, digital switch module D：Programmable voltage waveform generator S, standard capacitance module C；Programmable voltage waveform generator one terminates the industrial-frequency alternating current of 220V, another termination D/A signal adapters, then successively with digital switch module, standard capacitance module is connected, and realize becomes controllable local discharge instrument pulse signal by the programmable step voltage signal of generation；Programmable voltage waveform generator S generates programmable step voltage waveform；D/A signal adapter T, the digital signal for generating waveform generator are converted into analog signal；Digital switch module D is used to select the switch and break-make of capacitance；Standard capacitance module C, which is realized, converts the step voltage signal that voltage waveform generator generates to controllable local discharge instrument pulse signal.The present invention has the advantages that accuracy is high, and realization principle is simple, strong antijamming capability.
Description
Technical field
The present invention relates to high-tension apparatus technical field of measurement and test, the integrated form in specifically a kind of measurement of partial discharge circuit can
Control shelf depreciation instrument pulse signal generator.
Background technology
Power equipment shelf depreciation is the main reason for causing insulation degradation, at the same be also insulation degradation primary symptom and
The form of expression.Therefore detection partial discharge quantity, can more delicately reflect the initial failure of equipment, pre- effectively to take
Anti- measure provides foundation, has great importance for the safe and stable operation of power high voltage equipment.
Shelf depreciation instrument pulse signal generator can provide one for the check of shelf depreciation instrument and measurement of partial discharge
Convenient true partial discharge pulse signal so that measurement result accuracy, reliability are very high.
Currently used impulse generator can only generate the fixed impulse waveform of form, as long as that is, physical device is fixed, production
Raw pulse also just secures.In this way so that, different measuring circuits is needed in the different tests for carrying out shelf depreciation, are caused into
This is very high, and precision is not high.In addition to this, they are typically only capable to output 10 variation ranges apparent charge discharge capacity below,
Its output area is 1000pC, accuracy 5%-10%.Current high voltage electric appliance apparatus local discharge cannot be met to measure
The required precision of amount.
Invention content
The object of the present invention is to provide a kind of accuracy height, and realization principle is simple, and the integrated form of strong antijamming capability is controllable
Shelf depreciation instrument pulse signal generator.
The purpose of the present invention is adopt the following technical scheme that be achieved：
A kind of integrated form controllable local discharge instrument pulse signal generator, including programmable voltage waveform generator S, D/A
Signal adapter T, digital switch module D：Programmable voltage waveform generator S, standard capacitance module C；Wherein, described to compile
Journey voltage waveform generator one terminates the industrial-frequency alternating current of 220V, then another termination D/A signal adapters are opened with number successively
Module is closed, standard capacitance module is connected, and realize becomes controllable local discharge instrument arteries and veins by the programmable step voltage signal of generation
Rush signal；Programmable voltage waveform generator S is for generating programmable step voltage waveform；D/A signal adapter T, are used for
Convert the digital signal that waveform generator generates to analog signal；Digital switch module D, switch for selecting capacitance and logical
It is disconnected；Standard capacitance module C is realized and is converted the step voltage signal that voltage waveform generator generates to controllable local discharge instrument arteries and veins
Rush signal.
Programmable voltage waveform generator S of the present invention is arbitrary waveform generator, and the frequency that can be generated is up to
The various waveform voltages of 80MHZ；Programmable voltage waveform generator S generates the rise time by programmed environment, fall time, holds
Step voltage of the continuous temporally variable and amplitude in -10V -10V；Programmable voltage waveform generator S is by changing step voltage
The amplitude of state modulator pulse, polarity, the repeatable frequency of rise time and impulse train.The D/A signal converters T be with
The 150205A-01 of programmable waveform generator supporting belt BNC connector, the number that can generate programmable waveform generator are believed
Number be converted to analog signal.The digital switch module D is made of a series of switch in parallel, can be by the number given
Judge the state of each switch of those in the series.The standard capacitance module C by 1PF, 2PF, 5PF, 100PF, 200PF,
500PF, 1000PF capacitance compose in parallel；Each standard capacitance is connected with each switch of digital switch D respectively, then in parallel,
I.e. each digital switch controls a standard capacitance.The standard capacitance module C by with load in series to be tested, constitute
Differential circuit allows hand over different capacitances by controlling digital switch, different time constants is obtained, to control pulse
Fall time.
The present invention can generate the rise time, fall time, pulsewidth, polarity, the variable pulse signal of pulse number, and can
To continuously generate the apparent charge of any size in 1-10000pC, accuracy 2%-4%.With accuracy height, realize former
The advantages that reason is simple, strong antijamming capability.Have compared with common pulse signal generator at present incomparable notable excellent
Point.
Description of the drawings
Fig. 1 is the system block diagram of controllable local discharge pulse signal generator；
Fig. 2 is the programmable panel of controllable local discharge pulse signal generator；
Fig. 3 is the oscillogram that embodiment generates.
Specific implementation mode
It elaborates below to the embodiment of the present invention.
A kind of integrated form controllable local discharge instrument pulse signal generator, including programmable voltage waveform generator S, D/A
Signal adapter T, digital switch module D：Programmable voltage waveform generator S, standard capacitance module C；Wherein, described to compile
Journey voltage waveform generator one terminates the industrial-frequency alternating current of 220V, then another termination D/A signal adapters are opened with number successively
Module is closed, standard capacitance module is connected, and realize becomes controllable local discharge instrument arteries and veins by the programmable step voltage signal of generation
Rush signal；Programmable voltage waveform generator S is for generating programmable square wave voltage waveform；D/A signal adapter T, are used for
Convert the digital signal that waveform generator generates to analog signal；Digital switch module D, switch for selecting capacitance and logical
It is disconnected；Standard capacitance module C is realized and is converted the step voltage signal that voltage waveform generator generates to controllable local discharge instrument arteries and veins
Rush signal.
Programmable voltage waveform generator S of the present invention is arbitrary waveform generator, and the frequency that can be generated is up to
The various waveform voltages of 80MHZ.Programmable voltage waveform generator S can be generated through programmed environment, generate the rise time, under
Drop the time, duration etc. is variable and amplitude -10V -10V step voltage.Programmable voltage waveform generator S, by changing
The amplitude of pulse can be controlled by becoming the parameter of step voltage, polarity, the repeatable frequency etc. of rise time and impulse train.D/A
Signal converter T is the 150205A-01 with programmable waveform generator supporting belt BNC connector, and programmable waveform can occur
The digital signal that device generates is converted to analog signal.Digital switch module D, is made of a series of switch in parallel, can pass through
The state of those each switches in the digital judgement the given series.Standard capacitance module C by 1PF, 2PF, 5PF, 100PF,
The capacitances such as 200PF, 500PF, 1000PF compose in parallel；Each standard capacitance is connected with each switch of digital switch D respectively, so
In parallel afterwards, i.e., each digital switch controls a standard capacitance.Standard capacitance module C by with load in series to be tested, structure
At differential circuit, different capacitances is allowed hand over to get to different time constants, to control arteries and veins by controlling digital switch
The fall time of punching.
It is the system block diagram of controllable local discharge pulse signal generator as shown in Figure 1, may be programmed square-wave waveform generator
S, for generating programmable square wave voltage waveform；D/A signal adapter T, the digital signal for generating waveform generator
It is converted into analog signal；Digital switch module D, the switch for selecting capacitance and break-make；Standard capacitance module C, realization will be electric
The step voltage signal that corrugating generator generates is converted into controllable local discharge instrument pulse signal.
It is illustrated in figure 2 the programmable panel of controllable local discharge pulse signal generator, programmable face is given in figure
The parameter of plate includes rise time, fall time, step duration, amplitude size, polarity etc..
Programmable voltage waveform generator is given according to step voltage waveform shown in Fig. 2, standard capacitance is allowed to be 15pF,
100pF loads are 10K Ω, and obtained impulse waveform is as shown in Figure 3.Wherein (a) is 15pF, positive impulse waveform when 15pc；
(b) it is 15pF, negative impulse waveform when 15pc；(c) it is 15pF, positive dipulse signal when 15pc；(d) it is 100pF,
Single positive impulse waveform when 100pc；(e) be the rise time be 23.686ns 15pc single positive pulse signal.
Claims (6)
1. a kind of integrated form controllable local discharge instrument pulse signal generator, which is characterized in that sent out including programmable voltage waveform
Raw device S, D/A signal adapter T, digital switch module D, standard capacitance module C；Wherein, programmable voltage waveform hair
Raw device one terminates the industrial-frequency alternating current of 220V, another termination D/A signal adapters, then successively with digital switch module D, standard
Capacitance module C is connected, and realize becomes controllable local discharge instrument pulse signal by the programmable step voltage signal of generation；It can compile
Journey voltage waveform generator S is for generating programmable step voltage waveform；D/A signal adapter T are used for programmable voltage
The digital signal that waveform generator generates is converted into analog signal；Digital switch module D, for selection criteria capacitance module C's
Switch and break-make；Standard capacitance module C, realization converts the step voltage signal that programmable voltage waveform generator generates to can
Control shelf depreciation instrument pulse signal.
2. a kind of integrated form controllable local discharge instrument pulse signal generator as described in claim 1, which is characterized in that described
Programmable voltage waveform generator S be arbitrary waveform generator, the various waveform voltages that frequency is up to 80MHZ can be generated；
Programmable voltage waveform generator S by programmed environment generate the rise time, fall time, variable duration and amplitude-
The step voltage of 10V -10V；Programmable voltage waveform generator S by change step voltage state modulator pulse amplitude,
The repeatable frequency of polarity, rise time and impulse train.
3. a kind of integrated form controllable local discharge instrument pulse signal generator as described in claim 1, which is characterized in that described
D/A signal adapters T be 150205A-01 with programmable voltage waveform generator supporting belt BNC connector, can compile
The digital signal that journey voltage waveform generator generates is converted to analog signal.
4. a kind of integrated form controllable local discharge instrument pulse signal generator as described in claim 1, which is characterized in that described
Digital switch module D be made of a series of switch in parallel, can be each by those in the digital judgement series given
The state of switch.
5. a kind of integrated form controllable local discharge instrument pulse signal generator as claimed in claim 4, which is characterized in that described
Standard capacitance module C composed in parallel by 1PF, 2PF, 5PF, 100PF, 200PF, 500PF, 1000PF standard capacitance；Each mark
Pseudo-capacitance is connected with each switch of digital switch module D respectively, then in parallel, i.e. one standard capacitance of each switch control.
6. a kind of integrated form controllable local discharge instrument pulse signal generator as described in claim 1, which is characterized in that described
Standard capacitance module C by with load in series to be tested, constitute differential circuit, by control digital switch module D can
Switch different capacitances, obtain different time constants, to control the fall time of pulse.
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105652229A (en) * | 2016-04-13 | 2016-06-08 | 云南电网有限责任公司电力科学研究院 | Controllable partial discharge pulse signal generator |
| CN105891690A (en) * | 2016-04-25 | 2016-08-24 | 广东电网有限责任公司佛山供电局 | Signal generating device |
| CN107887182A (en) * | 2017-09-27 | 2018-04-06 | 华电电力科学研究院 | A kind of assembly method for the capacitance group that series resonant inverter uses |
| ES2723430B8 (en) | 2018-02-20 | 2020-12-29 | Fundacion Para El Fomento De La Innovacion Ind | Method for the evaluation and qualification of the functional characteristics of partial discharge diagnostic and measurement instruments and installation to generate series of partial discharge reference pulses |
| CN108828404B (en) * | 2018-05-09 | 2022-04-08 | 国网浙江省电力有限公司电力科学研究院 | Low-voltage distribution area electrical topology identification system and method for rapid fault location |
| CN109342986A (en) * | 2018-12-14 | 2019-02-15 | 西安远测电力科技有限公司 | Standard discharge capacity signal generation apparatus for oscillation wave partial discharge test |
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| CN1955749A (en) * | 2005-10-26 | 2007-05-02 | 韩国电力公社 | Broad band uhf local discharge signal and graphics generator |
| CN101702012A (en) * | 2009-11-24 | 2010-05-05 | 中国西电电气股份有限公司 | Apparent charge calibrator for local discharge capacity measurement |
| CN103245926A (en) * | 2013-04-24 | 2013-08-14 | 广西电网公司电力科学研究院 | Efficient simulation device for partial discharge modes under various faults in high-voltage switch cabinet |
| CN104635124A (en) * | 2015-01-22 | 2015-05-20 | 深圳供电局有限公司 | Simulation device for partial discharge mode |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1955749A (en) * | 2005-10-26 | 2007-05-02 | 韩国电力公社 | Broad band uhf local discharge signal and graphics generator |
| CN101702012A (en) * | 2009-11-24 | 2010-05-05 | 中国西电电气股份有限公司 | Apparent charge calibrator for local discharge capacity measurement |
| CN103245926A (en) * | 2013-04-24 | 2013-08-14 | 广西电网公司电力科学研究院 | Efficient simulation device for partial discharge modes under various faults in high-voltage switch cabinet |
| CN104635124A (en) * | 2015-01-22 | 2015-05-20 | 深圳供电局有限公司 | Simulation device for partial discharge mode |
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