CN104977555B - A kind of test system and its test method for being directly injected into controllable pulse source PD meter - Google Patents
A kind of test system and its test method for being directly injected into controllable pulse source PD meter Download PDFInfo
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- CN104977555B CN104977555B CN201510357543.3A CN201510357543A CN104977555B CN 104977555 B CN104977555 B CN 104977555B CN 201510357543 A CN201510357543 A CN 201510357543A CN 104977555 B CN104977555 B CN 104977555B
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Abstract
A kind of test system and test method for being directly injected into controllable pulse source PD meter, including pass through conducting wire (5) successively end to end controllable pulse source (1), shielded antenna (2), PD meter to be measured (3), digital oscilloscope (4), protective grounding (6), zero-bit ground connection (7)；The controllable pulse source is used for producing the various pulses for needing type；Shielded antenna is used for the magnetic field shielding for producing electric current in order to avoid influencing the normal work of other components；PD meter to be measured is used to detect local discharge signal；Digital oscilloscope is used to gather calibration pulse signal；Conducting wire is used for each component of connecting test system；Protective grounding is used for the deleterious charge that controllable pulse source produces by the earth release so as to be protected to component；Zero-bit ground connection is used to the zero-bit in local instrument test circuit system being grounded.The present invention have output pulse stabilization and pulse parameter it is adjustable, strong interference immunity, realization principle is simple, it is reliable the advantages that.
Description
Technical field
The present invention relates to power equipment shelf depreciation diagnostic techniques field, and in particular to one kind is directly injected into controllable pulse source
The test system and its test method of PD meter.
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.
Local discharge signal level is to weigh the indispensable means of insulation status of electrical equipment, but for different
Devices to test, the measurement result that same discharge capacity is shown in PD meter have very big difference, are treated even for same
Measurement equipment, different test loops also bring along different measurement results.Thus, using shelf depreciation calibrator to PD meter into
Row calibration is most important for accurate measurement local discharging level.
The product of current shelf depreciation instrument both domestic and external is very much, but its Performance And Reliability cannot usually meet local put
Electrical testing requirement.The method of detection shelf depreciation instrument is also many at present, has pulse current method, ultrasonic wave, hyperfrequency method etc., still
Every kind of method is not all completely to the means and system of instrument test.
The content of the invention
It is an object of the present invention to provide a kind of test system for being directly injected into controllable pulse source PD meter and its test side
Method, for the test to existing local discharge detection device performance.
To achieve these goals, technical solution proposed by the present invention is as follows：
A kind of test system for being directly injected into controllable pulse source PD meter, including it is end to end controllable successively by conducting wire
Clock, shielded antenna, PD meter to be measured, digital oscilloscope, protective grounding, zero-bit ground connection.The controllable pulse source is used for producing
The simple venation of the Parameter adjustables such as the raw various pulses for needing type, including amplitude, polarity, rising time, trailing edge time, pulsewidth
Punching；Shielded antenna is used for the magnetic field shielding for producing electric current in order to avoid influencing the normal work of other components；PD meter to be measured
For detecting shelf depreciation；Digital oscilloscope is used to gather calibration pulse signal；Conducting wire is used for each component of connecting test system；
Protective grounding is used for the deleterious charge that controllable pulse source produces by the earth release so as to be protected to component；Zero-bit connects
Ground is used to the zero-bit in local instrument test circuit system being grounded.
The method tested using test system of the present invention, is included the following steps：
Step 1：By the controllable pulse source, shielded antenna, PD meter to be measured, digital oscilloscope, protective grounding, zero-bit
Ground connection is joined end to end successively by conducting wire；
Step 2：Open controllable pulse source, using clock output charge be 1PC, 10PC, 20PC, 50PC, 70PC,
The positive pulse of 100PC, while using oscillograph collection income pulse, utilize observing and controlling analysis computer acquisition output pulse, output
The amplitude of pulse and the ratio of input pulse electric charge are the linearity of the local discharge detection device to be measured to positive pulse；
Step 3：Open controllable pulse source, using clock output charge be 1PC, 10PC, 20PC, 50PC, 70PC,
The negative pulse of 100PC, while be to treat with input pulse charge ratios using oscillograph collection output pulse, output pulse amplitude
Survey the linearity of the local discharge detection device to negative pulse；
Step 4：When comparative analysis input is positive and negative pulse, the pass between the linearity of local discharge detection device to be measured
System, you can obtain influence of the pulse polarity to local discharge detection device to be measured.
PD meter test system provided by the invention has output pulse stabilization and pulse parameter is adjustable, strong interference immunity,
Realization principle is simple, it is reliable the advantages that.
Brief description of the drawings
Fig. 1 is test system structure figure of the present invention；
Fig. 2 is controllable pulse source output waveform；
Fig. 3 aligns pulsed linear degree figure for PD meter.
Embodiment
Below in conjunction with the accompanying drawings, elaborate to embodiment, it should be emphasised that, the description below is merely exemplary
, the scope being not intended to be limiting of the invention and its application.
Fig. 1 is the test system structure block diagram for being directly injected into controllable pulse source PD meter.As shown in Figure 1, the present invention provides
The test system for being directly injected into controllable pulse source PD meter include controllable pulse source 1, shielded antenna 2, PD meter to be measured 3, number
Word oscillograph 4, conducting wire 5, protective grounding 6, zero-bit ground connection 7；Controllable pulse source 1, shielded antenna 2, PD meter to be measured 3, numeral are shown
Ripple device 4, protective grounding 6, zero-bit are grounded 7, are joined end to end successively by conducting wire 5；Controllable pulse source is used for producing various needing class
The pulse of type, shielded antenna is used for the magnetic field shielding for producing electric current in order to avoid influencing the normal work of other components, to be measured
PD meter is used to detect shelf depreciation, and digital oscilloscope is used to gather calibration pulse signal, and protective grounding is used for controllable pulse
The deleterious charge that source produces is by the earth release so as to be protected to component；Zero-bit ground connection is used for local instrument test circuit
Zero-bit ground connection in system.
Fig. 2 is the timing chart of controllable pulse source output, and (a) is that amplitude is 1V, and the rise time is the positive pulse ripple of 4ns
Shape, (b) are that amplitude is 0.5V, and the rise time is the positive pulse waveform of 4ns, and (c) is that amplitude is 1V, and the rise time is the negative of 4ns
Impulse waveform.
As shown in Figure 1 connection PD meter test system, then using clock output charge for 1PC, 10PC, 20PC,
The positive pulse of 50PC, 70PC, 100PC, record the voltage magnitude of output from oscillograph, then to input as abscissa, export
For ordinate, the linearity of PD meter is obtained.Fig. 3 aligns pulsed linear degree figure for PD meter.
The above, is only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto,
Any one skilled in the art the invention discloses technical scope in, the conversion that can readily occur in or replace
Change, should be covered by the protection scope of the present invention.
Claims (1)
1. a kind of test system for being directly injected into controllable pulse source PD meter, it is characterised in that the test system includes controllable arteries and veins
Rushing source (1) and shielded antenna (2) is connected to by conducting wire (5), shielded antenna (2) connects PD meter (3) to be measured by conducting wire (5),
PD meter (3) to be measured is connected by conducting wire (5) with digital oscilloscope (4), and controllable pulse source (1) is direct with protective grounding (6)
It is connected, PD meter to be measured is connected directly with zero-bit ground connection (7)；The controllable pulse source is used for producing the various arteries and veins for needing type
Punching；Shielded antenna is used for the magnetic field shielding for producing electric current in order to avoid influencing the normal work of other components；PD meter to be measured
For detecting local discharge signal；Digital oscilloscope is used to gather calibration pulse signal；Conducting wire is used for each of connecting test system
Component；Protective grounding is used for the deleterious charge that controllable pulse source produces by the earth release so as to be protected to component；
Zero-bit ground connection is used to the zero-bit in local instrument test circuit system being grounded；The method that the test system uses includes：
Step 1：By the controllable pulse source (1), shielded antenna (2), PD meter to be measured (3), digital oscilloscope (4), protection
Ground connection (6), zero-bit ground connection (7) are joined end to end successively by conducting wire (5)；
Step 2：Controllable pulse source is opened, is 1PC, 10PC, 20PC, 50PC, 70PC, 100PC using clock output charge
Positive pulse, while using oscillograph collection input pulse, export pulse using observing and controlling analysis computer acquisition, export the width of pulse
Value and the ratio of input pulse electric charge are the linearity of the local discharge detection device to be measured to positive pulse；
Step 3：Controllable pulse source is opened, is 1PC, 10PC, 20PC, 50PC, 70PC, 100PC using clock output charge
Negative pulse, while using oscillograph collection output pulse, output pulse amplitude and input pulse charge ratios are part to be measured
The linearity of the discharging detection device to negative pulse；
Step 4：When comparative analysis input is positive and negative pulse, the relation between the linearity of local discharge detection device to be measured, i.e.,
It can obtain influence of the pulse polarity to local discharge detection device to be measured.
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Families Citing this family (5)
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| CN105548937A (en) * | 2016-01-27 | 2016-05-04 | 云南电网有限责任公司电力科学研究院 | Partial discharge test system capable of directly injecting controllable impulse source |
| CN105891761A (en) * | 2016-06-21 | 2016-08-24 | 国网福建省电力有限公司 | Scattering parameter-based partial discharge ultrahigh frequency detection system field check method |
| CN108152773A (en) * | 2018-02-02 | 2018-06-12 | 昆明理工大学 | The impulse phase detection error caliberating device and scaling method of a kind of PD meter |
| CN108663575A (en) * | 2018-04-04 | 2018-10-16 | 中国人民解放军61489部队 | Large-scale shield low-frequency pulse high-intensity magnetic field shield effectiveness test system and test method |
| CN111239662A (en) * | 2020-02-06 | 2020-06-05 | 云南电网有限责任公司电力科学研究院 | Live calibration device and method for partial discharge monitoring equipment |
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