CN205539427U - Controllable partial discharge pulse generator - Google Patents
Controllable partial discharge pulse generator Download PDFInfo
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- CN205539427U CN205539427U CN201620305982.XU CN201620305982U CN205539427U CN 205539427 U CN205539427 U CN 205539427U CN 201620305982 U CN201620305982 U CN 201620305982U CN 205539427 U CN205539427 U CN 205539427U
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- pulse signal
- local discharge
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Abstract
The embodiment of the utility model discloses controllable partial discharge pulse generator, including voltage waveform generator able to programme, DA signal converter, digital switch module and standard capacitor module, a termination power frequency alternating current of voltage waveform generator able to programme, the other end connects gradually DA signal converter, digital switch module and standard capacitor module. Voltage waveform generator able to programme produces step voltage waveform signal able to programme, and DA signal converter converts the data signal who produces into analog signal, and the standard capacitor module turns into controllable partial discharge appearance pulse signal with step voltage waveform signal to through differentiating circuit with pulse signal transmission to the load of awaiting measuring. The embodiment of the utility model provides a controllable partial discharge pulse generator can generate rise time, decay time, pulse width, polarity, the changeable pulse signal of pulse number, produce 1 in succession the apparent charge of the any size in the 10000pC realizes that the principle is simple, and the degree of accuracy is high, and interference immunity is strong.
Description
Technical field
This utility model relates to high pressure equipment technical field of measurement and test, particularly relates to a kind of controllable local discharge pulse signal and sends out
Raw device.
Background technology
Power equipment shelf depreciation is to cause the main cause of insulation degradation, is also primary symptom and the table of insulation degradation simultaneously
Existing form.Therefore partial discharge quantity is detected, it is possible to reflect the initial failure of equipment more delicately, for effectively taking
Preventive measure provides foundation, has great importance the safe and stable operation of power high voltage equipment.
Check and measurement of partial discharge that partial discharge pulse's signal generator is shelf depreciation instrument provide pulse signal, it is provided that
Pulse signal whether convenient, true, directly affect accuracy and the reliability of measurement result.
It is solid that pulse signal generator in currently available technology can only produce the impulse waveform that form is fixing, i.e. physical device
Fixed, the pulse of generation is fixed therewith, causes and needs different measuring circuits when the different test carrying out shelf depreciation, increases
Add testing cost.Meanwhile, existing pulse signal generator is typically only capable to the apparent charge electric discharge exporting in 10 excursions
Amount, its output area is 1000pC, and accuracy is 5%-10%, it is impossible to meet current high voltage electric appliance apparatus local discharge
The required precision of measurement.
Therefore, a kind of waveform is provided and amplitude is controlled and partial discharge pulse's signal generator of high accuracy pulse signal
Urgently occur.
Utility model content
This utility model embodiment provides a kind of controllable local discharge pulse signal generator, to solve in prior art
The waveform of pulse signal that pulse signal generator produces, amplitude is uncontrollable and accuracy is low problem.
In order to solve above-mentioned technical problem, this utility model embodiment discloses following technical scheme:
A kind of controllable local discharge pulse signal generator include programmable voltage waveform generator, D/A signal adapter,
Digital switch module and standard capacitance module, a termination industrial-frequency alternating current of described programmable voltage waveform generator, another
End is sequentially connected with D/A signal adapter, digital switch module and standard capacitance module；
Described programmable voltage waveform generator is used for producing programmable step voltage waveform signal；
Described D/A signal adapter is for being converted to simulation by the digital signal that described programmable voltage waveform generator produces
Signal；
Described digital switch module is for selecting the break-make of described standard capacitance module；
Described standard capacitance module is for being converted into controllable local discharge instrument pulse signal by described step voltage waveform signal.
Preferably, described step voltage waveform signal includes that frequency is up to the multiple waveforms voltage of 80MHZ.
Preferably, described step voltage waveform signal includes rise time, fall time and variable duration, and amplitude
Step voltage at-10V 10V.
Preferably, described D/A signal adapter is connected by BNC connector with described programmable voltage waveform generator.
Preferably, described digital switch module includes the switch of multiple parallel connection.
Preferably, described standard capacitance module includes the electric capacity of multiple parallel connection, and each electric capacity is all connected with a switch.
Preferably, described standard capacitance module by capacitance be respectively 1PF, 2PF, 5PF, 100PF, 200PF, 500PF,
The electric capacity of 1000PF composes in parallel.
Preferably, described standard capacitance module is for constituting peaker with load in series to be tested.
From above technical scheme, a kind of controllable local discharge pulse signal generator that this utility model embodiment provides
The pulse signal that rise time, fall time, pulsewidth, polarity, pulse number are variable can be generated, and can continuously generate
The apparent charge of any size in 1-10000pC, it is achieved principle is simple, accuracy is high, and capacity of resisting disturbance is strong.
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, below will to embodiment or
In description of the prior art, the required accompanying drawing used is briefly described, it should be apparent that, for ordinary skill people
For Yuan, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
The structural representation of a kind of controllable local discharge pulse signal generator that Fig. 1 provides for this utility model embodiment；
Symbol table in Fig. 1 is shown as: S-programmable voltage waveform generator, T-D/A signal adapter, D-digital switch
Module, C-standard capacitance module.
Detailed description of the invention
For the technical scheme making those skilled in the art be more fully understood that in this utility model, below in conjunction with this practicality
Accompanying drawing in new embodiment, is clearly and completely described the technical scheme in this utility model embodiment, it is clear that
Described embodiment is only a part of embodiment of this utility model rather than whole embodiments.New based on this practicality
Embodiment in type, the every other reality that those of ordinary skill in the art are obtained under not making creative work premise
Execute example, all should belong to the scope of this utility model protection.
For solving the pulse signal waveform of pulse signal generator of the prior art generation, amplitude is uncontrollable and accuracy is low
Problem, this utility model embodiment provide a kind of controllable local discharge pulse signal generator, by programming change can
The input parameter of program voltage waveform generator S, according to the parameter value of input, programmable voltage waveform generator S exports
Corresponding step voltage waveform signal, through D/A signal adapter T, the step voltage waveform of standard capacitance module C pair
Signal converts, the controllable local discharge instrument pulse signal that output amplitude, frequency, rise time, fall time are variable.With
A kind of controllable local discharge pulse signal generator that this utility model embodiment is provided by lower combination accompanying drawing is carried out specifically
Bright.
The structural representation of a kind of controllable local discharge pulse signal generator that Fig. 1 provides for this utility model embodiment,
As it is shown in figure 1, a kind of controllable local discharge pulse signal generator that this utility model embodiment provides includes electricity able to programme
Corrugating generator S, D/A signal adapter T, digital switch module D and standard capacitance module C.
The one termination 220V industrial-frequency alternating current of programmable voltage waveform generator S, the other end and D/A signal adapter T,
Digital switch module D and standard capacitance module C are sequentially connected.Programmable voltage waveform generator S is used for producing able to programme
Step voltage waveform signal, by programming change programmable voltage waveform generator S input parameter, export and input
The step voltage waveform signal that parameter is corresponding.Wherein, in this utility model embodiment, step voltage waveform signal can wrap
Including frequency and be up to 80MHZ, amplitude is at the multiple waveforms voltage of-10V 10V, and can input state modulator step by adjusting
The repeatable frequency etc. of the amplitude of voltage waveform signal, polarity, rise time, fall time and impulse train.Certainly, on
The adjustment mode to step voltage waveform signal of stating is only this utility model embodiment one exemplary illustration, the technology of this area
Other parameter of step voltage waveform signal can be adjusted by personnel according to actual needs, and it all should fall into this practicality
Within novel protection domain.
The outfan of programmable voltage waveform generator S is electrically connected with the input of D/A signal adapter T, D/A signal
The digital signal that programmable voltage waveform generator S produces is converted to analogue signal by transducer T.At this utility model one
Planting in preferred embodiment, D/A signal adapter T is connected by BNC connector with described programmable voltage waveform generator S.
The digital switch module D state by each digital switch of given digital judgement, and control the logical of each digital switch
Disconnected.Digital switch module D is made up of the digital switch of multiple parallel connections, and those skilled in the art can be the most right
The quantity of digital switch carries out corresponding extension, such as, 2,3,4,5 or 6 etc., it should be understood that
Within it all should fall into protection domain of the present utility model.
Step voltage waveform signal is converted into controllable local discharge instrument pulse signal by standard capacitance module C.Standard electric molar
Block C includes multiple standard capacitance connected with parallel way, and those skilled in the art can be according to actual needs to standard electric
The quantity held carries out corresponding extension, and such as, 2,3,4,5 or 6 etc., it should be understood that it all should
Within falling into protection domain of the present utility model.
The quantity of digital switch and the quantity of standard capacitance keep consistent, each standard capacitance respectively with digital switch module D
In the series connection of digital switch, the most each digital switch controls a standard capacitance.The quantity of such as digital switch and mark
When the quantity of pseudo-capacitance is respectively two, digital switch module D includes the first digital switch, the second digital switch, standard electric
Molar block C includes the first standard capacitance, the second standard capacitance.First digital switch and the first capacitances in series, the second numeral is opened
Closing and the second capacitances in series, two groups of digital switch are connected with parallel way with digital capacitance.First digital control first electric capacity
Break-make in circuit, the second digital control second electric capacity break-make in circuit.
In standard capacitance module C, the capacitance of multiple standard capacitances is different, in this utility model one preferred embodiment,
The capacitance of standard capacitance includes 1PF, 2PF, 5PF, 100PF, 200PF, 500PF, 1000PF, it should be noted that
It is that those skilled in the art capacitance to standard capacitance can carry out corresponding adjustment according to actual needs, and it all should
Within falling into protection domain of the present utility model.The standard capacitance different by controlling digital switch switching, when obtaining difference
Between constant, thus control the fall time of controllable local discharge instrument pulse.
The Voltage Series that standard capacitance module C produces with programmable voltage waveform generator S, according to Q=U × C, the most available
Continuous print apparent charge in 1-10000pC.
The outfan of standard capacitance module C constitutes peaker with load in series to be tested, pulse is believed by peaker
Number transmission to load to be tested, carries out performance test.
It is more fully understood that the technical program for the ease of those skilled in the art, believes below in conjunction with controllable local discharge pulse
The use process of number generator is further described.
When using a kind of controllable local discharge pulse signal generator output pulse signal that this utility model embodiment provides,
The outfan of load to be tested with standard capacitance module C is connected, constitutes peaker.According to test process pulse signals
Demand, programmable voltage waveform generator S arranges the parameters of step voltage waveform, including pulse, Shuan Mai
Punching, the selection of random pulses, and amplitude, time delay, rise time, fall time and step persistent period.
According to the parameter value inputted, the step voltage waveform signal that programmable voltage waveform generator S output is corresponding.Through D/A
The conversion of signal adapter T, the digital signal that programmable voltage waveform generator S produces is converted to analogue signal.By control
The standard capacitance that digital switch processed switching is different, obtains different time constant, it is achieved under controllable local discharge instrument pulse
The control of fall time.Step voltage waveform signal is converted into controllable local discharge instrument pulse signal by standard capacitance module C, and
By peaker by pulse signal transmission to load to be tested, carry out performance test.
The above is only detailed description of the invention of the present utility model, makes to skilled artisans appreciate that or realize this reality
With novel.Multiple amendment to these embodiments will be apparent to one skilled in the art, herein institute
The General Principle of definition can realize in the case of without departing from spirit or scope of the present utility model in other embodiments.
Therefore, this utility model is not intended to be limited to the embodiments shown herein, and is to fit to disclosed herein
Principle and the consistent the widest scope of features of novelty.
The above is only detailed description of the invention of the present utility model, it is noted that for the ordinary skill of the art
For personnel, on the premise of without departing from this utility model principle, it is also possible to make some improvements and modifications, these improve
Also protection domain of the present utility model is should be regarded as with retouching.
Claims (8)
1. a controllable local discharge pulse signal generator, it is characterised in that include programmable voltage waveform generator (S),
D/A signal adapter (T), digital switch module (D) and standard capacitance module (C), described programmable voltage waveform is sent out
One termination industrial-frequency alternating current of raw device (S), the other end and D/A signal adapter (T), digital switch module (D) and
Standard capacitance module (C) is sequentially connected；
Described programmable voltage waveform generator (S) is used for producing programmable step voltage waveform signal；
Described D/A signal adapter (T) is for the digital signal described programmable voltage waveform generator (S) produced
Be converted to analogue signal；
Described digital switch module (D) is used for selecting the break-make of described standard capacitance module (C)；
Described standard capacitance module (C) for being converted into controllable local discharge instrument pulse letter by described step voltage waveform signal
Number.
Controllable local discharge pulse signal generator the most according to claim 1, it is characterised in that described step electricity
Corrugating signal includes that frequency is up to the multiple waveforms voltage of 80MHZ.
Controllable local discharge pulse signal generator the most according to claim 1, it is characterised in that described step electricity
Corrugating signal includes rise time, fall time and variable duration, and amplitude is at the step voltage of-10V 10V.
Controllable local discharge pulse signal generator the most according to claim 1, it is characterised in that described D/A
Signal adapter (T) is connected by BNC connector with described programmable voltage waveform generator (S).
Controllable local discharge pulse signal generator the most according to claim 1, it is characterised in that described numeral is opened
Close module (D) and include the switch of multiple parallel connection.
Controllable local discharge pulse signal generator the most according to claim 5, it is characterised in that described standard electric
Molar block (C) includes the electric capacity of multiple parallel connection, and each electric capacity is all connected with a switch.
Controllable local discharge pulse signal generator the most according to claim 6, it is characterised in that described standard electric
Molar block (C) is respectively the electric capacity of 1PF, 2PF, 5PF, 100PF, 200PF, 500PF, 1000PF also by capacitance
Joint group becomes.
Controllable local discharge pulse signal generator the most according to claim 1, it is characterised in that described standard electric
Molar block (C) is for constituting peaker with load in series to be tested.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620305982.XU CN205539427U (en) | 2016-04-13 | 2016-04-13 | Controllable partial discharge pulse generator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620305982.XU CN205539427U (en) | 2016-04-13 | 2016-04-13 | Controllable partial discharge pulse generator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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2016
- 2016-04-13 CN CN201620305982.XU patent/CN205539427U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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