CN103176160A - Local discharge simulation calibrating device - Google Patents
Local discharge simulation calibrating device Download PDFInfo
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- CN103176160A CN103176160A CN2013100769029A CN201310076902A CN103176160A CN 103176160 A CN103176160 A CN 103176160A CN 2013100769029 A CN2013100769029 A CN 2013100769029A CN 201310076902 A CN201310076902 A CN 201310076902A CN 103176160 A CN103176160 A CN 103176160A
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Abstract
The invention discloses a local discharge simulation calibrating device which comprises a pulse frequency selecting module, a pulse signal generating module, a pulse amplitude adjusting module, a polar plate and a capacitive coupling probe. The pulse frequency selecting module is used for selecting a pulse signal generator which generates a certain frequency. The pulse signal generating module is used for generating a pulse signal with a certain frequency. The pulse amplitude adjusting module is used for adjusting amplitude of the pulse signal generated by t he pulse signal generating module. The pulse signal adjusted by the pulse amplitude adjusting module is connected to the polar plate which is matched with the capacitive coupling probe. The capacitive coupling probe is used for outputting calibrating signals to a local discharge tester. By the local discharge simulation calibrating device, the defects of complex operation, single function, instable output, poor anti-interference capability and the like of traditional local discharge calibrators are overcome.
Description
Technical field
Shelf depreciation emulation calibrating installation of the present invention carries out the emulation calibration to instrument for measuring partial discharge.
Background technology
Instrument for measuring partial discharge is called for short PD meter, is the indispensable instrument of the apparatus insulated situation of detecting electric.Traditional PD meter generally adopts Wiring type, Devices to test need to be cut off the power supply during measurement, to Devices to test pressurization, then measures to one's heart's content condition of Devices to test office; This mode needs Devices to test out of service, is unfavorable for the continuous working of Devices to test; Need in addition to add high pressure to Devices to test, can cause to the performance of Devices to test damage to a certain degree.Novel PD meter is general adopts capacity coupled mode to measure to one's heart's content condition of Devices to test office; Not needing when this mode is measured does not affect the Devices to test continuous working with the Devices to test outage, does not need Devices to test is added high pressure simultaneously, can realize measuring without impact Devices to test work.Therefore, the capacitance coupling type PD meter just is subject to extensive concern and use once release.
Put test through actual office, it is found that for different electrical equipments, in the situation that discharge capacity is identical, can there be larger difference in the measured the possibility of result of PD meter; Even for same electrical equipment, different PD meters also can record different results.Therefore, in order to address the above problem, people adopt the shelf depreciation calibration system that PD meter is calibrated, so that shelf depreciation situation that can the Measurement accuracy electrical equipment.Yet there are the defectives such as metering system backwardness, function singleness, poor anti jamming capability, man-machine interface be friendly not in traditional shelf depreciation calibrating device always, shows following many deficiencies in the PD meter calibration operation:
1) because adopting Wiring type, traditional PD meter measures shelf depreciation, so traditional shelf depreciation calibration system also must adopt the Wiring type calibration.The Wiring type PD meter has many drawbacks, being apparent that most needs the device powers down that will move, and to one's heart's content condition of its office is measured in pressurization, and this not only can the continuous running status of breaking device, production is impacted, and pressurization has also damaged equipment performance to a certain extent to equipment.
2) traditional shelf depreciation calibration system function singleness.The waveform characteristic difference of the discharge pulse that produces in different shelf depreciation processes is often larger, is embodied in the difference such as repetition frequency, pulse amplitude of pulse.Difference on these waveform characteristics has proposed diversified requirement to the function of shelf depreciation calibrating device, and traditional shelf depreciation calibrating device can only be simulated the discharge pulse of particular form usually, there is the shortcoming of function singleness,, pulse repetition rate adjustable extent narrow such as the pulse amplitude scope is little etc., can't satisfy diversified calibration operation in the measurement of partial discharge of reality.
3) traditional shelf depreciation calibrating device output is stable not.Especially frequency and the changes in amplitude of output pulse that shows it is larger, and easily is subject to the interference of temperature in environment, humidity, high-power electric appliance.So the result that records is often not ideal enough.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the invention provides a kind of shelf depreciation emulation calibrating installation of capacitive coupling, by the pulse signal that produces given frequency and amplitude, PD meter is calibrated, use simply, calibrate accurately.
Technical scheme: for achieving the above object, the technical solution used in the present invention is:
A kind of shelf depreciation emulation calibrating installation comprises pulsed frequency selection module, pulse signal generation module, pulse height adjustment module, pole plate and capacitive coupling probe;
Described pulsed frequency is selected module, is used for selecting to produce the pulse signal generator of certain frequency;
Described pulse signal generation module is for generation of the pulse signal of certain frequency;
Described pulse height adjustment module, the pulse signal that is used for the generation of pulse signals generation module carries out amplitude adjusted;
Process pulse height adjustment module is carried out the pulse signal access pole plate after amplitude adjusted;
Described pole plate and capacitive coupling probe are adaptive;
Described capacitive coupling probe is used for to instrument for measuring partial discharge's input calibration signal.
Said apparatus selects module to select the satisfactory pulse signal generator of frequency from some pulse signal generators by pulsed frequency in use at first as required, and then corresponding pulse signal generator work produces the pulse signal of certain frequency; Determine as required again the amplitude of the pulse of needs, the pulse signal that can the pulse signals generator produces by the pulse height adjustment module carries out amplitude adjusted, pulse height adjustment module output has been frequency and the known pulse signal of amplitude like this, this pulse signal access pole plate is as the calibrating signal of instrument for measuring partial discharge, by the capacitive coupling output of popping one's head in.Said apparatus adopts capacitive coupling, has simplified the difficulty of calibration process and can not affect the normal operation of Devices to test.Capacity coupled mode has been adopted in this case, and this mode is that contact type measurement and unconventional Wiring type are measured, and is therefore easy for operation; And capacity coupled mode has reduced external lead wire, has improved the anti-interference of whole device, can make the precision of calibration further improve; In addition, measures such as injecting the metal shell shielding can also be set in the periphery of this device, can further improve the anti-interference of device.
Concrete, described pulse signal generation module comprises Schmidt trigger A, Schmidt trigger B, electric capacity, resistance and diode; At first described Schmidt trigger A utilizes the single-phase conduction of diode and discharging and recharging of electric capacity to coordinate resistance to consist of multivibrator, produces the periodic swinging signal; Then the periodic swinging signal that produces inputs to Schmidt trigger B, utilizes the shaping characteristic of Schmidt trigger B self, is square-wave pulse signal with the periodic swinging signal shaping of inputting.
Concrete, described pulse pulse height adjustment module comprises based on the on-off circuit of triode design and the voltage divider that designs based on adjustable potentiometer; The pulse signal that described pulse signal generation module produces is as the opening and closing of switching signal source gauge tap circuit, and described voltage divider is used for the amplitude of gauge tap circuit output pulse.
By the pulse height adjustment module, can design the amplitude range of whole device, such as the design amplitude is up to 70dB, the minimum 15dB of reaching etc.; Certainly, for the convenience of using, many gears of amplitude can be set directly, face by structures such as mechanical keys the amplitude that words select to need output directly, such as between high-amplitude 70dB and lowest amplitude 15dB, some gears etc. being set, such as 9 gears.
Concrete, described pulsed frequency selects module based on relay design, selects to produce the pulse signal generator of certain frequency according to the on off state of relay; Select module with the pulsed frequency based on a relay design, under the relay normally off, select the pulse signal generation module work of 0.95kHz, under the relay normally open state, select the pulse signal generation module work of 17.1kHz.Can realize working respectively of multiplex pulse signal generation module by relay, the signal that reduces between pulse signal generation module disturbs.
Preferably, described pole plate is copper pole plate.
Concrete, also comprising power module, described power module is chargeable 3200mAH, 25.6V lithium battery, improves the stability of output pulse amplitude and frequency.
Beneficial effect: shelf depreciation emulation calibrating installation provided by the invention has solved the defectives such as complicated operation, function singleness, output that traditional shelf depreciation calibrating device exists always are stable not, poor anti jamming capability.
Description of drawings
Fig. 1 is schematic diagram of the present invention;
Fig. 2 is the circuit diagram of pulse signal generation module;
Fig. 3 is the circuit diagram of pulse height adjustment module.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described.
Be illustrated in figure 1 as a kind of shelf depreciation emulation calibrating installation, comprise pulsed frequency selection module, two pulse signal generation modules, pulse height adjustment module, copper pole plate, capacitive coupling probe and power modules; The pulsed frequency that described two pulse signal generation modules produce is respectively 0.95kHz and 17.1kHz; Described power module is chargeable 3200mAH, 25.6V lithium battery.
Described pulsed frequency is selected module, is used for selecting to produce the pulse signal generator of certain frequency; Described pulsed frequency selects module based on a relay design, select to produce the pulse signal generator of certain frequency according to the on off state of relay, be specially: under the relay normally off, select the pulse signal generation module work of 0.95kHz, under the relay normally open state, select the pulse signal generation module work of 17.1kHz.Can realize working respectively of multiplex pulse signal generation module by relay, the signal that reduces between pulse signal generation module disturbs.
Described pulse signal generation module is for generation of the pulse signal of certain frequency; As shown in Figure 2, described pulse signal generation module comprises Schmidt trigger, electric capacity, resistance and diode, at first described Schmidt trigger utilizes the single-phase conduction of diode and discharging and recharging of electric capacity to coordinate resistance to consist of multivibrator, the shaping characteristic of recycling Schmidt trigger self is shaped as square-wave pulse signal with the output signal of multivibrator.
The cycle of pulse height adjustment module shown in Figure 2 is T, and according to the multivibrator principle, the T computing formula is as follows:
T=In2*(R
4+2R
2)C
2
Dutycycle q is:
q=(R
2+R
4)/(R
4+2R
2)
By upper two formulas as can be known, the capacitor C in illustrating by adjusting
2, resistance R
2And resistance R
4Be worth, get final product the frequency of regulation output square wave, by regulating resistance R
2And resistance R
4Value can regulating impulse dutycycle.
Described pulse height adjustment module, the pulse signal that is used for the generation of pulse signals generation module carries out amplitude adjusted; As shown in Figure 3, described pulse pulse height adjustment module comprises based on the on-off circuit of triode design and the voltage divider that designs based on adjustable potentiometer; The pulse signal that described pulse signal generation module produces is as the opening and closing of switching signal source gauge tap circuit, and described voltage divider is used for the amplitude of gauge tap circuit output pulse.In this case, the design amplitude is up to 70dB(ideal pulse output), the minimum 15dB of reaching, and between high-amplitude 70dB and lowest amplitude 15dB, 9 gears are set, carry out gear by the mechanical keys structure to select; When design, adopted the boost module of 110V, the 15V direct current is converted into 110V direct current output pulse, to improve pulse height.
Process pulse height adjustment module is carried out the pulse signal access pole plate after amplitude adjusted, and pole plate and capacitive coupling probe are adaptive, as shown in Figure 1, consist of coupling capacitance between the pole plate of pole plate and capacitive coupling probe, pole plate just can be to the capacitive coupling transmission voltage signal of popping one's head in like this, described capacitive coupling probe is used for to instrument for measuring partial discharge's input calibration signal.
The above is only the preferred embodiment of the present invention; be noted that for those skilled in the art; under the prerequisite that does not break away from the principle of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (6)
1. a shelf depreciation emulation calibrating installation, is characterized in that: comprise pulsed frequency selection module, pulse signal generation module, pulse height adjustment module, pole plate and capacitive coupling probe;
Described pulsed frequency is selected module, is used for selecting to produce the pulse signal generator of certain frequency;
Described pulse signal generation module is for generation of the pulse signal of certain frequency;
Described pulse height adjustment module, the pulse signal that is used for the generation of pulse signals generation module carries out amplitude adjusted;
Process pulse height adjustment module is carried out the pulse signal access pole plate after amplitude adjusted;
Described pole plate and capacitive coupling probe are adaptive;
Described capacitive coupling probe is used for to instrument for measuring partial discharge's input calibration signal.
2. shelf depreciation emulation calibrating installation according to claim 1, it is characterized in that: described pulse signal generation module comprises Schmidt trigger A, Schmidt trigger B, electric capacity, resistance and diode; At first described Schmidt trigger A utilizes the single-phase conduction of diode and discharging and recharging of electric capacity to coordinate resistance to consist of multivibrator, produces the periodic swinging signal; Then the periodic swinging signal that produces inputs to Schmidt trigger B, utilizes the shaping characteristic of Schmidt trigger B self, is square-wave pulse signal with the periodic swinging signal shaping of inputting.
3. shelf depreciation emulation calibrating installation according to claim 1 is characterized in that: described pulse pulse height adjustment module comprises based on the on-off circuit of triode design with based on the voltage divider of adjustable potentiometer design; The pulse signal that described pulse signal generation module produces is as the opening and closing of switching signal source gauge tap circuit, and described voltage divider is used for the amplitude of gauge tap circuit output pulse.
4. shelf depreciation emulation calibrating installation according to claim 1 is characterized in that: described pulsed frequency selects module based on relay design, selects to produce the pulse signal generator of certain frequency according to the on off state of relay.
5. shelf depreciation emulation calibrating installation according to claim 1, it is characterized in that: described pole plate is copper pole plate.
6. shelf depreciation emulation calibrating installation according to claim 1, it is characterized in that: also comprise power module, described power module is chargeable 3200mAH, 25.6V lithium battery.
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| CN2013100769029A CN103176160A (en) | 2013-03-11 | 2013-03-11 | Local discharge simulation calibrating device |
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| CN2013100769029A CN103176160A (en) | 2013-03-11 | 2013-03-11 | Local discharge simulation calibrating device |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103472422A (en) * | 2013-08-20 | 2013-12-25 | 国家电网公司 | Checking method of geoelectrical wave detecting instrument |
| CN103698671A (en) * | 2013-12-12 | 2014-04-02 | 深圳供电局有限公司 | Simulated frequency modulation series resonance test device |
| CN104849686A (en) * | 2015-04-27 | 2015-08-19 | 上海交通大学 | Partial discharge detector performance evaluation system |
| CN105024557A (en) * | 2015-08-07 | 2015-11-04 | 姚晓武 | Power circuit for driving insulted gate bipolar transistor (IGBT) |
| CN105277860A (en) * | 2015-11-12 | 2016-01-27 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Multifunctional field partial discharge test system |
| CN105510860A (en) * | 2016-01-28 | 2016-04-20 | 云南电网有限责任公司电力科学研究院 | Power frequency synchronization digital embedded partial discharge detector calibration system |
| CN105607023A (en) * | 2016-01-28 | 2016-05-25 | 云南电网有限责任公司电力科学研究院 | Pulse signal generation and measurement method for calibration of partial discharge detector |
| 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 |
| CN105869386A (en) * | 2016-06-15 | 2016-08-17 | 湖南工业大学 | Locomotive speed sensor signal filtering device |
| 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 |
| CN107167715A (en) * | 2017-06-30 | 2017-09-15 | 中国西电电气股份有限公司 | A kind of intelligent GIS partial discharges IED test loops and method |
| CN109048149A (en) * | 2018-08-31 | 2018-12-21 | 许少辉 | A kind of tool center point calibration circuit of welding robot |
| 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 |
| CN109782100A (en) * | 2019-03-13 | 2019-05-21 | 海检检测有限公司 | A kind of test device and test method for the pincers calibration of automotive electronics capacitive coupling |
| CN113687195A (en) * | 2021-08-13 | 2021-11-23 | 重庆大学 | Electrical equipment discharge fault simulation device and method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2066967A (en) * | 1979-12-14 | 1981-07-15 | Counting Instr Ltd | Partial discharge detection in the presence of interference |
| JP2001201531A (en) * | 2000-01-20 | 2001-07-27 | Nissin Electric Co Ltd | Simulation partial discharge signal generator |
| CN201233439Y (en) * | 2008-07-15 | 2009-05-06 | 国网武汉高压研究院 | Calibrating apparatus for partial discharge tester |
| CN202189141U (en) * | 2010-12-31 | 2012-04-11 | 保定天威集团有限公司 | Calibrator for partial discharge detection equipment |
| CN102650685A (en) * | 2012-05-14 | 2012-08-29 | 云南电力试验研究院（集团）有限公司电力研究院 | Method for assessing technical parameters of TEV (Transient Earth Voltage) partial discharge testing instruments for power systems |
| CN102866375A (en) * | 2012-09-07 | 2013-01-09 | 广东电网公司电力科学研究院 | System and method for calibrating receiving performance of partial-discharge ultrahigh frequency detection device |
-
2013
- 2013-03-11 CN CN2013100769029A patent/CN103176160A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2066967A (en) * | 1979-12-14 | 1981-07-15 | Counting Instr Ltd | Partial discharge detection in the presence of interference |
| JP2001201531A (en) * | 2000-01-20 | 2001-07-27 | Nissin Electric Co Ltd | Simulation partial discharge signal generator |
| CN201233439Y (en) * | 2008-07-15 | 2009-05-06 | 国网武汉高压研究院 | Calibrating apparatus for partial discharge tester |
| CN202189141U (en) * | 2010-12-31 | 2012-04-11 | 保定天威集团有限公司 | Calibrator for partial discharge detection equipment |
| CN102650685A (en) * | 2012-05-14 | 2012-08-29 | 云南电力试验研究院（集团）有限公司电力研究院 | Method for assessing technical parameters of TEV (Transient Earth Voltage) partial discharge testing instruments for power systems |
| CN102866375A (en) * | 2012-09-07 | 2013-01-09 | 广东电网公司电力科学研究院 | System and method for calibrating receiving performance of partial-discharge ultrahigh frequency detection device |
Non-Patent Citations (1)
| Title |
|---|
| ALTON CHANEY ETC.: "Simple MOSFET-based high-voltage nanosecond pulse circuit", 《IEEE TRANSACTIONS ON PLASMA SCIENCE》, vol. 32, no. 5, 31 October 2004 (2004-10-31), XP011121036, DOI: doi:10.1109/TPS.2004.835966 * |
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103472422A (en) * | 2013-08-20 | 2013-12-25 | 国家电网公司 | Checking method of geoelectrical wave detecting instrument |
| CN103698671B (en) * | 2013-12-12 | 2016-10-12 | 深圳供电局有限公司 | A kind of simulation frequency adjustment serial connection resonant testing device |
| CN103698671A (en) * | 2013-12-12 | 2014-04-02 | 深圳供电局有限公司 | Simulated frequency modulation series resonance test device |
| CN104849686A (en) * | 2015-04-27 | 2015-08-19 | 上海交通大学 | Partial discharge detector performance evaluation system |
| CN104849686B (en) * | 2015-04-27 | 2017-10-31 | 上海交通大学 | Partial discharge detector's performance evaluation system |
| CN105024557A (en) * | 2015-08-07 | 2015-11-04 | 姚晓武 | Power circuit for driving insulted gate bipolar transistor (IGBT) |
| CN105277860A (en) * | 2015-11-12 | 2016-01-27 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Multifunctional field partial discharge test system |
| CN105277860B (en) * | 2015-11-12 | 2018-08-14 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of multi-functional live local discharge test system |
| CN105510860A (en) * | 2016-01-28 | 2016-04-20 | 云南电网有限责任公司电力科学研究院 | Power frequency synchronization digital embedded partial discharge detector calibration system |
| CN105607023A (en) * | 2016-01-28 | 2016-05-25 | 云南电网有限责任公司电力科学研究院 | Pulse signal generation and measurement method for calibration of partial discharge detector |
| 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 |
| CN105869386A (en) * | 2016-06-15 | 2016-08-17 | 湖南工业大学 | Locomotive speed sensor signal filtering device |
| CN105869386B (en) * | 2016-06-15 | 2019-05-24 | 湖南工业大学 | Locomotive speed sensor device signal filtering equipment |
| CN107167715A (en) * | 2017-06-30 | 2017-09-15 | 中国西电电气股份有限公司 | A kind of intelligent GIS partial discharges IED test loops and method |
| CN109048149A (en) * | 2018-08-31 | 2018-12-21 | 许少辉 | A kind of tool center point calibration circuit of welding robot |
| 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 |
| CN109782100A (en) * | 2019-03-13 | 2019-05-21 | 海检检测有限公司 | A kind of test device and test method for the pincers calibration of automotive electronics capacitive coupling |
| CN113687195A (en) * | 2021-08-13 | 2021-11-23 | 重庆大学 | Electrical equipment discharge fault simulation device and method |
| CN113687195B (en) * | 2021-08-13 | 2024-05-03 | 重庆大学 | Electrical equipment discharge fault simulation device and method |
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Application publication date: 20130626 |