CN203224596U - Partial discharge tester - Google Patents
Partial discharge tester Download PDFInfo
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- CN203224596U CN203224596U CN 201320182390 CN201320182390U CN203224596U CN 203224596 U CN203224596 U CN 203224596U CN 201320182390 CN201320182390 CN 201320182390 CN 201320182390 U CN201320182390 U CN 201320182390U CN 203224596 U CN203224596 U CN 203224596U
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- acquisition module
- speed acquisition
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- partial discharge
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Abstract
The utility model belongs to the technical field of electric power detection, and concretely relates to a partial discharge tester for detecting insulation quality and performance of electrical equipment. The partial discharge tester includes a pre-filtering attenuation amplification module, a high-voltage buffer module, a high-speed acquisition module, a low-speed acquisition module, and a computer; wherein a partial discharge signal is inputted to the high-speed acquisition module through the pre-filtering attenuation amplification module; a high-voltage signal is inputted to the low-speed acquisition module through the high-voltage buffer module, output ends of the high-speed acquisition module and the low-speed acquisition module are both connected to the computer, and the computer obtains the amplitude and the phase of the high-voltage signal and the partial discharge signal through analysis. By adopting a modular design and adopting a European clamp type on the mechanical structure, the partial discharge tester of the utility model has good shielding property to extraneous signals.
Description
Technical field
The utility model belongs to electric power detection technique field, is exactly a kind of instrument for measuring partial discharge of detecting insulation of electrical installation quality and performance specifically.
Background technology
As everyone knows, accurate and stable instrument for measuring partial discharge guarantees high voltage electric appliance quality and the indispensable visual plant of safe operation of power system.Particularly realize that by conventional art the technology of hyperchannel monitoring just seems comparatively complicated, and the modern digital technology has just embodied very large advantage in this field for needing such as three-phase transformer etc. multicenter simultaneously monitored the time.In recent years, advanced by leaps and bounds at the virtual instrument technique that the digital technology field grows up, and particularly based on the application of Digital Signal Processing, made instrument have more powerful digital processing function, realized the function that the conventional digital technical device can't be realized.
And at present on the market some instrument for measuring partial discharge generally adopt the analog filtering hardware module that signal is handled, because of the analog filtering hardware module in when design because the electrical equipment in the circuit is more, so cause circuit design comparatively complicated, be subjected to the interference of extraneous signal easily, shielding properties is relatively poor.
The utility model content
The utility model provides a kind of instrument for measuring partial discharge in order to overcome the deficiencies in the prior art, and the electrical equipment in its tester is significantly reduced, and has good shielding properties.
To achieve these goals, the utility model has designed a kind of instrument for measuring partial discharge, comprise pre-filtering decay amplification module, the high-pressure buffer module, the high speed acquisition module, low speed acquisition module and computing machine, wherein local discharge signal inputs to the high speed acquisition module by pre-filtering decay amplification module; High-voltage signal inputs to the low speed acquisition module by high-pressure modular, and the output terminal of high speed acquisition module and low speed acquisition module all is connected to computing machine, and computing machine is by analyzing size and the phase place that obtains high-voltage signal and local discharge signal.
The utility model is compared with prior art, and this instrument for measuring partial discharge adopts modular design, and adopts the Europe cassette in its physical construction, therefore has the shielding properties good to extraneous signal.
Preferably, computing machine can insert three groups of local discharge signals and three groups of high-voltage signals simultaneously, and wherein every group of local discharge signal is through independently pre-filtering decay amplification module and high speed acquisition module are fed through computing machine with signal separately; Every group of high-voltage signal is fed through computing machine through organizing independently high-pressure buffer module and low speed acquisition module with signal.Because each collection and control of organizing local discharge signal and high-voltage signal is mutual independence, so can realize three-channel instrument for measuring partial discharge is converted into the function of single channel or binary channels instrument for measuring partial discharge simply by increasing or deleting pre-filtering decay amplification module and the high speed acquisition module of respectively organizing in the local discharge signal and delete the high-pressure buffer module of respectively organizing in the high-voltage signal.
Preferably, the output terminal of high speed acquisition module and low speed acquisition module adopts the usb data interface to be connected to computing machine, has realized the convenience of tester and control desk interconnection, can insert desktop computer or notebook.
Preferably, pre-filtering decay amplification module is by wave filter, and attenuator and amplifier connect and compose successively, control by computing machine, utilize digital filtering technique, realize bandwidth setting flexibly, utilizes signal processing technology to realize background denoising sound function simultaneously.
Preferably, attenuator is Pi type resistance attenuator, has namely guaranteed accurate decay, has overcome traditional use digital regulation resistance damped system again and the additional noise brought, utilizes the software compensation technology simultaneously, and accurate gear switch is provided.
Preferably, the high speed acquisition module is a high-speed data acquisition card, adopts virtual instrument technique, can realize functions such as the automatic gear switch of preposition amplification, digital filtering, phase-locking locking.
Description of drawings
Fig. 1 is the circuit module figure among the utility model embodiment one;
Fig. 2 is the circuit module figure among the utility model embodiment two;
Fig. 3 is put test interface for office of the present utility model;
Fig. 4 is put assay surface for office of the present utility model;
Referring to Fig. 1 and Fig. 2,1 is pre-filtering decay amplification module; 2 is the high-pressure buffer module; 3 is the high speed acquisition module; 4 is the low speed acquisition module; 5 is computing machine; 6 is wave filter; 7 is attenuator; 8 is amplifier.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing each embodiment of the present utility model is explained in detail.Yet, persons of ordinary skill in the art may appreciate that in each embodiment of the utility model, in order to make the reader understand the application better many ins and outs have been proposed.But, even without these ins and outs with based on many variations and the modification of following each embodiment, also can realize each claim of the application technical scheme required for protection.
First embodiment of the present utility model relates to a kind of instrument for measuring partial discharge, as shown in Figure 1, formed by four modules, specifically comprise pre-filtering decay amplification module 1, high-pressure buffer module 2, high speed acquisition module 3 and low speed acquisition module 4, and control and analyze by a computing machine 5.
Wherein local discharge signal inputs to described high speed acquisition module 3 by pre-filtering decay amplification module 1; High-voltage signal inputs to described low speed acquisition module 4 by described high-pressure buffer module 3.High speed acquisition module 3 all is connected to computing machine 5 with the output terminal of described low speed acquisition module 4, software in the computing machine 5 carries out obtaining size and the phase place of high-voltage signal and local discharge signal after digital filtering and the denoising, and is presented at forms such as ellipse or sines on the display screen of computing machine 5.
Instrument for measuring partial discharge in hence one can see that first embodiment adopts modular design, has therefore significantly reduced the quantity that adopts electrical equipment in the traditional analog filtering hardware module, therefore extraneous signal is had good shielding properties.Adopt the Europe cassette in its physical construction in addition, so also have the favorable mechanical performance.
The output terminal of high speed acquisition module and low speed acquisition module adopts the usb data interface to be connected to computing machine in addition, has realized the convenience of tester and control desk interconnection, can directly insert desktop computer or notebook.And the high speed acquisition module is one and adopts virtual instrument technique based on the high-speed data acquisition card of American National instrument, can realize the functions such as switching, digital filtering, phase-locking locking of the automatic gear of preposition amplification.
In the present embodiment, pre-filtering decay amplification module is by wave filter 6, and attenuator 7 and amplifier 8 connect and compose successively, control by computing machine 5, utilize digital filtering technique, realize bandwidth setting flexibly, utilize signal processing technology to realize background denoising sound function simultaneously.And this attenuator is Pi type resistance attenuator, has namely guaranteed accurate decay, has overcome traditional use digital regulation resistance damped system again and the additional noise brought, utilizes the software compensation technology simultaneously, and accurate gear switch is provided.Software is based on the LabVIEW development platform, and correction, test and Data Management Analysis function are put in the design office of comprising.As shown in Figure 3, be test interface, functions such as demonstration, voltage demonstration, gear switch automatically, correction are put in the office of comprising.As shown in Figure 4, be the data analysis interface, comprise functions such as data readback, three-dimensional collection of illustrative plates demonstration.
Second embodiment of the present utility model relates to a kind of instrument for measuring partial discharge.Second embodiment is to have done further improvement to obtain on the basis of first embodiment.The concrete improvement as shown in Figure 2, computing machine 5 inserts three groups of local discharge signals and three groups of high-voltage signals simultaneously, and wherein every group of local discharge signal is through independently pre-filtering decay amplification module 1 and high speed acquisition module 3 are fed through computing machine 5 with signal separately; Every group of high-voltage signal is fed through computing machine 5 through organizing independently high-pressure buffer module 2 and low speed acquisition module 4 with signal.Because each collection and control of organizing local discharge signal and high-voltage signal is mutual independence, so can realize three-channel instrument for measuring partial discharge is converted into the function of single channel or binary channels instrument for measuring partial discharge simply by increasing or deleting pre-filtering decay amplification module and the high speed acquisition module of respectively organizing in the local discharge signal and delete the high-pressure buffer module of respectively organizing in the high-voltage signal.
Persons of ordinary skill in the art may appreciate that the respective embodiments described above are to realize specific embodiment of the utility model, and in actual applications, can do various changes to it in the form and details, and do not depart from spirit and scope of the present utility model.
Claims (6)
1. an instrument for measuring partial discharge is characterized in that, comprises pre-filtering decay amplification module, the high-pressure buffer module, the high speed acquisition module, low speed acquisition module and computing machine, wherein local discharge signal inputs to described high speed acquisition module by described pre-filtering decay amplification module; High-voltage signal inputs to described low speed acquisition module by described high-pressure buffer module, the output terminal of described high speed acquisition module and described low speed acquisition module all is connected to described computing machine, and described computing machine is by analyzing size and the phase place that obtains high-voltage signal and local discharge signal.
2. instrument for measuring partial discharge according to claim 1, it is characterized in that: described computing machine inserts three groups of local discharge signals and three groups of high-voltage signals simultaneously, and wherein every group of local discharge signal is through independently pre-filtering decay amplification module and high speed acquisition module are fed through computing machine with signal separately; Every group of high-voltage signal is fed through computing machine through organizing independently high-pressure buffer module and low speed acquisition module with signal.
3. instrument for measuring partial discharge according to claim 1 and 2 is characterized in that: the output terminal of described high speed acquisition module adopts the usb data interface to be connected to described computing machine;
The output terminal of described low speed acquisition module adopts the usb data interface to be connected to described computing machine.
4. instrument for measuring partial discharge according to claim 1 and 2 is characterized in that: described pre-filtering decay amplification module is by wave filter, and attenuator and amplifier connect and compose successively.
5. instrument for measuring partial discharge according to claim 4, it is characterized in that: described attenuator is Pi type resistance attenuator.
6. instrument for measuring partial discharge according to claim 1 and 2, it is characterized in that: described high speed acquisition module is a high-speed data acquisition card.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320182390 CN203224596U (en) | 2013-04-12 | 2013-04-12 | Partial discharge tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320182390 CN203224596U (en) | 2013-04-12 | 2013-04-12 | Partial discharge tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203224596U true CN203224596U (en) | 2013-10-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320182390 Expired - Lifetime CN203224596U (en) | 2013-04-12 | 2013-04-12 | Partial discharge tester |
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| Country | Link |
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| CN (1) | CN203224596U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112666437A (en) * | 2021-01-29 | 2021-04-16 | 上海杰智电工科技有限公司 | Remote signal acquisition device and partial discharge test system |
-
2013
- 2013-04-12 CN CN 201320182390 patent/CN203224596U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112666437A (en) * | 2021-01-29 | 2021-04-16 | 上海杰智电工科技有限公司 | Remote signal acquisition device and partial discharge test system |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131002 |
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| CX01 | Expiry of patent term |