CN201083797Y - Portable insulating oil dielectric strength determinator - Google Patents
Portable insulating oil dielectric strength determinator Download PDFInfo
- Publication number
- CN201083797Y CN201083797Y CNU2007200281053U CN200720028105U CN201083797Y CN 201083797 Y CN201083797 Y CN 201083797Y CN U2007200281053 U CNU2007200281053 U CN U2007200281053U CN 200720028105 U CN200720028105 U CN 200720028105U CN 201083797 Y CN201083797 Y CN 201083797Y
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- voltage
- sine wave
- regulating module
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- sinusoidal wave
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Abstract
The utility model discloses a portable insulating oil dielectric strength tester, which comprises a CPU controlling unit, a sine wave voltage measuring unit, a breakdown current collecting unit, a high pressure step- up transformer, a testing oil cup and a sine wave testing voltage generating unit which a polymer ionization cell, a pure sine wave inverter circuit, a sine wave regulating module and a stepless regulation controlling circuit, the polymer ionization cell provides an instrument power supply for the pure sine wave inverter circuit, the pure sine wave inverter circuit outputs a sine wave alternative voltage and is connected with an input end of the sine wave regulating module, the stepless regulation controlling circuit outputs a direct current voltage signal to a control end the sine wave regulating module to control the sine wave regulating module output end to output a continuously boosted alternative voltage in a certain rate, the alternative voltage boosted via the high voltage step up transformer is applied on an oil sample in the testing oil cup. The utility model can be widely used for various field and laboratory insulating oil dielectric strength oil quantity test.
Description
Technical field
The utility model relates to the electric power safety field tests, is specifically related to a kind of Portable Insulating Oil Dielectric Strength Tester.
Background technology
Voltage breakdown is an important indicator that characterizes dielectric oil dielectrical strength, in the test process of electric insulation oil, need an adjustable high tension voltage and be added in insulation lubricating cup two ends, voltage progressively rises from zero, when voltage reaches a certain value, insulating oil will be destroyed and be lost resistance, be accompanied by the generation of electric arc and conduct electricity, and this voltage is called the voltage breakdown of insulating oil.Voltage breakdown and test condition are closely related, and these conditions comprise: the waveform, frequency, peak factor, the short-circuit current of testing transformer, the shape of electrode, interelectrode distance, the situation of electrode surface, the volume of lubricating cup, the rate of rise, breadboard temperature, the humidity that apply voltage are relevant.
At present, the dielectric strength proving installation that electric system is used, test conditions such as electrode separation, electrode surface situation and lubricating cup volume have all formed unified standard, and temperature and humidity also all has relatively uniform requirement.And for processing, voltage regulating mode and the detection mode of the required trial voltage waveform of test, all there is certain defective in the proving installation that electric system is at present used, below makes a concrete analysis of according to its used pressurization voltage regulating mode.
1, civil power+automatic coupling voltage regulator method: this test mode is to use the most general dielectric strength test mode at present, equipment is directly introduced voltage from civil power, inevitably there are a large amount of interference clutters, the inevitable also existence of waveform, frequency, peak factor that instrument is applied voltage influences, and causes influencing test figure.And because the self-characteristic of automatic coupling voltage regulator, cause that actual what apply is the trial voltage of phase step type, and instrument repeatability and poor reliability, and this kind instrument can't break away from civil power and enter site test owing to rely on civil power.
2, civil power+filter circuit of pressure-stabilizing+automatic coupling voltage regulator method: this method is after introducing civil power, civil power is carried out passing through the pressure regulator pressure regulation again behind the voltage regulation filtering, the effective filtering of its filter circuit of pressure-stabilizing the interference harmonic wave in the civil power, but still there is the instability of amplitude and frequency in part.What simultaneously this voltage regulating mode applied still is the trial voltage of phase step type, instrument repeatability and poor reliability, and still can not break away from civil power and enter site test.
3, civil power+filter circuit of pressure-stabilizing+ordinary electronic voltage regulating module: this method is after introducing civil power, civil power is carried out passing through the pressure regulator pressure regulation again behind the voltage regulation filtering, the effective filtering of its filter circuit of pressure-stabilizing the interference harmonic wave in the civil power, but still there is the instability of amplitude and frequency in part; The great advantage of the method has been to use the electronic pressure regulating module to replace automatic coupling voltage regulator, can guarantee oil is applied the trial voltage that boosts continuously.But also still there is critical defect in the method, and what the electronic pressure regulating mode that just is to use was difficult to guarantee to export is pure sine wave voltage, and still can't break away from civil power and enter the scene and test.
4, common batteries+interchange generative circuit+automatic coupling voltage regulator method: this kind method biggest advantage is to carry out the test of scene property, but since the capacity of the battery that uses itself little with defectives such as weight is big, can't finish many group tests when making it at the scene continuously, and instrument generally also will attach an all no small battery case of volume capacity, and carrying and using all has very big limitation
Therefore, electric system at present a kind of can providing is provided stablized pure sine voltage, can be convenient for carrying site test, and can break away from the portable dielectric strength analyzers that finish many group tests under the civil power situation.
Along with the maturation gradually of polymer Li-ion battery technology of new generation, be that instrument power supply disengaging mains-supplied has become possibility thereby adopt polymer Li-ion battery.
The liquid electrolyte that polymer Li-ion battery adopts solid polymer electrolyte to replace lithium ion battery to use, not only have the characteristics such as high voltage, long circulation life, discharging voltage balance and cleanliness without any pollution of liquid lithium ionic cell, and eliminated the potential safety hazard of the blast of liquid lithium ionic cell existence.Profile is more flexible, convenient simultaneously, and weight is lighter and handier, and its energy quality is described as the lithium ion battery of a new generation than 3 times that are existing lithium ion battery, is suitable as very much the instrument internal power supply.
Summary of the invention
The technical problems to be solved in the utility model is: can be convenient for carrying and enter site test, can provide and stablize pure sine voltage, can finish many group tests under the civil power situation breaking away from.
The technical solution of the utility model is: a kind of Portable Insulating Oil Dielectric Strength Tester, comprise the CPU control module, the sine voltage measuring unit, the breakdown current collecting unit, H.V. step up transformer, test lubricating cup and sinusoidal wave trial voltage generating unit, it is characterized in that described sinusoidal wave trial voltage generating unit comprises the polymer ions battery, the pure sine wave inverter circuit, sinusoidal wave voltage regulating module and stepless voltage regulation control circuit, described polymer ions battery provides instrument power source, be the pure sine wave inverter circuit supply, the sinusoidal wave voltage regulating module input end of pure sine wave inverter circuit sine wave output alternating current crimping, CPU control module control stepless voltage regulation control circuit output one is pressed the continuous d. c. voltage signal that raises of given pace to sinusoidal wave voltage regulating module control end, control alternating voltage that the output of sinusoidal wave voltage regulating module output terminal boosts continuously by given pace on H.V. step up transformer boosts after-applied oil sample in the test lubricating cup, the sine voltage measuring unit is measured sinusoidal wave voltage regulating module output voltage at any time, the breakdown current collecting unit measures the oil sample breakdown current signal of H.V. step up transformer generation and is sent to the CPU control module respectively, CPU control module control test process.
The utility model has following advantage compared with the prior art:
1, to adopt the mode of integrated high capacity new polymers ion battery be regulating circuit power supply to the utility model, but not the conventional batteries of joining formula is outward powered, also non-directly from civil power introducing voltage system power supply, system's power supply can break away from civil power, for system provides clean power supply, and this type of battery capacity is big, in light weight, is suitable as very much the instrument internal power supply.
2, the utility model adopts pure sine wave inverter circuit mode to generate 220V/50Hz voltage, output waveform is more reliable than traditional approach, output alternating current 220V/50Hz voltage, waveform, frequency, peak value are all very stable, do not exist in civil power various interference wave.
3, voltage regulating mode of the present utility model adopts the pure sine wave voltage regulating module, and the output voltage step evolution of having avoided using automatic coupling voltage regulator to cause on traditional voltage regulating mode raises.
4, during the utility model pressure regulation, regulating circuit feeds back current information of voltage to the system CPU control module at any time, sinusoidal wave voltage regulating module sine wave output trial voltage is finished by control stepless voltage regulation control circuit by the CPU control module of instrument, output waveform is stable sine wave, owing to have real-time feedback circuit, can carry out step-less adjustment by system CPU to output more exactly.
Description of drawings
Fig. 1 is a structured flowchart of the present utility model;
Fig. 2 is the stepless voltage regulation control circuit schematic diagram of embodiment of the present utility model;
Fig. 3 is the pure sine wave inverter circuit theory diagrams of embodiment of the present utility model.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
Among Fig. 1, in the structured flowchart of the present utility model, Portable Insulating Oil Dielectric Strength Tester comprises the CPU control module, the sine voltage measuring unit, the breakdown current collecting unit, H.V. step up transformer, test lubricating cup and sinusoidal wave trial voltage generating unit, it is characterized in that described sinusoidal wave trial voltage generating unit comprises the polymer ions battery, the pure sine wave inverter circuit, sinusoidal wave voltage regulating module and stepless voltage regulation control circuit, described polymer ions battery provides instrument power source, be the pure sine wave inverter circuit supply, the sinusoidal wave voltage regulating module input end of pure sine wave inverter circuit sine wave output alternating current crimping, CPU control module control stepless voltage regulation control circuit output one is pressed the continuous d. c. voltage signal that raises of given pace to sinusoidal wave voltage regulating module control end, control alternating voltage that the output of sinusoidal wave voltage regulating module output terminal boosts continuously by given pace on H.V. step up transformer boosts after-applied oil sample in the test lubricating cup, the sine voltage measuring unit is measured sinusoidal wave voltage regulating module output voltage at any time, the breakdown current collecting unit measures the oil sample breakdown current signal of H.V. step up transformer generation and is sent to the CPU control module respectively, CPU control module control whole test process.
In the stepless voltage regulation control circuit schematic diagram of Fig. 2 embodiment of the present utility model, CPU control module output control signal is come the voltage signal of control chip U1 output 0-5V by plug JP1, this voltage signal through the voltage follower U2 that forms by LM358 with the raising driving force, control the linear optical coupling circuit of being made up of G1, G2 then, making its output terminal is the linear signal of isolating with control signal.The full voltage scope of output terminal is by the 1 pin input of plug JP2, and output voltage signal is exported by 2 pin, and 3 pin are ground wire.JP2 is connected to the control input end of pure sine wave voltage regulating module, and the 0-5 of its control input signals lies prostrate the 0-220V of corresponding sinusoidal wave voltage regulating module output stablizing sine voltage, reaches the purpose of adjusting output voltage with this.
Figure chips model and peripheral circuit exemplary operation parameter thereof:
R1：20K，R2、R3、R4：470Ω，C1、C2：104pF，U1：AD5320，U2：LM358AN，G1、G2：P521，RT1、RT2：50K，D8：1N4148。
In the pure sine wave inverter circuit theory diagrams of Fig. 3 embodiment of the present utility model:
IC3 adopts commercially available inverter control chip, by OUTA and OUTB pin sine wave output SPWM (SINE PULSE WIDEMODULITION, Sine Wave Pulse Width Modulation) pulse train, through the positive-negative half-cycle of the corresponding sine waveform of difference after the inversion, frequency is 20KHz.
The sinusoidal wave SPWM waveform of output prevents to burn out inversion element MOSFET pipe through the dead band control circuit that IC1A, IC1B, IC2A, IC2B, IC2C and IC2D form when the positive-negative half-cycle waveform replaces.
Send into the break-make of the special-purpose mosfet driver of IC4, IC5 composition by the SPWM ripple of dead band control circuit with the control bridge circuit.
The full-bridge break-make that IC4, IC5 control T1, T2, four MOSFET pipes of T3, T4 are formed, positive-negative half-cycle respectively has the pair of pipes conducting.
The special-purpose EI type of bridge circuit output termination inverter step-up transformer is increased to 220 volts with voltage, and connects a CBB capacitor C 9 at 220 volts of ends, waveform is put in order be pure sine waveform.
Circuit feeds back current output voltage information at any time by the feedback circuit of elements such as optic coupling element U1 and R2 composition simultaneously, and by this feedback information, control chip IC3 can adjust output pulse sequence in real time, to reach the purpose of regulated output voltage and output frequency.
Figure chips model and peripheral circuit exemplary operation parameter thereof:
R1：4.7K，R2：220Ω，R3：470K，R4、R5、R8、R9：36Ω，R6、R7、R10、R11：10K，R12：470Ω，RT1：20K，C1、C2：470μF/50V，C3：47μF/25，C4：0.47μF，C5：0.22μF，C6：104pF，C7：47μF/25V，C8：10μF/25V，C9：1μF/400V，C10：10μF/25V，C11、C12：20pF，D1-D4：1N4007，D5、D6：FR107，U1：P521，IC1A、IC1B：74HC14，IC2A、IC2B、IC2C、IC2D：74HC08，IC4、IC5：IR2110，T1-T4：IRFZ48S，FUSEL：2A。
The utility model adopts the commercial polymer ion battery power supply that carries the charge and discharge protecting control circuit, as sharp pond, sky, Beijing energy PL 1085120M 24V/10AH type polymer ions battery.Owing to replaced liquid electrolyte with solid electrolyte, compare with liquid lithium ionic cell, but the polymer ions battery has advantages such as thin typeization, arbitrary areaization and arbitrary shapeization, can not produce the problem on the safety such as leakage and combustion explosion yet, therefore can be with plastic-aluminum combined thin film fabrication battery case, thus the specific storage of entire cell can be improved; Polymer Li-ion battery can also adopt macromolecule to make positive electrode, and its specific energy will improve more than 50% than present liquid lithium ionic cell.In addition, polymer Li-ion battery all increases than lithium ion battery at aspects such as operating voltage, charge and discharge circulation lifes.
Sinusoidal wave voltage regulating module of the present utility model can adopt commercially available pure sine wave voltage regulating module, ZXB-2A type product as Shanghai Fo Langke electronics product, the alternating current 220V signal of the input termination pure sine wave inverter circuit output of voltage regulating module, 0 to 5V direct current signal of control end input stepless voltage regulation control circuit output, the corresponding output of output terminal is from 0 to the 220V AC signal of boosting continuously by given pace.
Sine wave voltage regulating module institute sine wave output trial voltage is finished by control stepless voltage regulation control circuit by the CPU control module of instrument, output waveform is stable sine wave, and have real-time feedback circuit, can carry out step-less adjustment by system CPU to output more exactly.
CPU control module of the present utility model can adopt the micro processor device of prior art and comprise peripherals such as demonstration, keyboard, printing, and its embedded program is as follows according to dielectric oil dielectrical strength testing standard control device workflow:
(1) instrument powers on, and screen display enters main interface;
(2) can enter the pressure regulation boost mode by respective keys, before boosting, the polymer ions battery of CPU control module automatically control is integrated auto charge and discharge function is the pure sine wave inverter circuit supply, generate stable 220V sine wave AC voltage by the inverter inversion, and this 220V voltage is inserted sinusoidal wave voltage regulating module input end;
(3) CPU control module control stepless voltage regulation control circuit generates 0 to 5V the DC voltage that at the uniform velocity raises by certain speed, and thus the sinusoidal wave voltage regulating module output of Control of Voltage from 0 to the 220V stable alternating voltage that raises of speed in accordance with regulations;
(4) after the voltage of voltage regulating module output boosts through H.V. step up transformer, generate 0 to the 80KV alternating voltage that at the uniform velocity raises of speed in accordance with regulations, this voltage is applied on the oil sample in the test lubricating cup;
(5) the sine voltage measuring unit is measured the current voltage that applies at any time, and is sent to system CPU, so that record and adjustment in real time apply voltage;
When (6) oil sample took place to puncture, high-tension transformer can produce the current signal of a sudden change, after this signal is obtained by the breakdown current collecting unit, carries out sending the CPU control module to after the photoelectricity isolation processing;
When (7) the CPU control module receives breakdown signal, stop to write down the magnitude of voltage that applies, and with last magnitude of voltage of precedence record as the oil sample voltage breakdown.Simultaneously, system CPU is reduced to 0V by the stepless voltage regulation control circuit with the voltage regulator control circuit output voltage, disconnects high pressure;
(8) test findings such as screen display voltage breakdown, printable as required test findings.
Portable Insulating Oil Dielectric Strength Tester of the present utility model can carry easily and enter site test, can provide and stablize pure sine voltage and can be widely used in the oil test of all kinds of scenes and testing laboratory breaking away to finish under the civil power situation how group is tested.
Claims (1)
1. Portable Insulating Oil Dielectric Strength Tester, comprise the CPU control module, the sine voltage measuring unit, the breakdown current collecting unit, H.V. step up transformer, test lubricating cup and sinusoidal wave trial voltage generating unit, it is characterized in that described sinusoidal wave trial voltage generating unit comprises the polymer ions battery, the pure sine wave inverter circuit, sinusoidal wave voltage regulating module and stepless voltage regulation control circuit, described polymer ions battery provides instrument power source, be the pure sine wave inverter circuit supply, the sinusoidal wave voltage regulating module input end of pure sine wave inverter circuit sine wave output alternating current crimping, CPU control module control stepless voltage regulation control circuit output one is pressed the continuous d. c. voltage signal that raises of given pace to sinusoidal wave voltage regulating module control end, control alternating voltage that the output of sinusoidal wave voltage regulating module output terminal boosts continuously by given pace on H.V. step up transformer boosts after-applied oil sample in the test lubricating cup, the sine voltage measuring unit is measured sinusoidal wave voltage regulating module output voltage at any time, the breakdown current collecting unit measures the oil sample breakdown current signal of H.V. step up transformer generation and is sent to the CPU control module respectively, CPU control module control test process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200281053U CN201083797Y (en) | 2007-09-18 | 2007-09-18 | Portable insulating oil dielectric strength determinator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200281053U CN201083797Y (en) | 2007-09-18 | 2007-09-18 | Portable insulating oil dielectric strength determinator |
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| Publication Number | Publication Date |
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| CN201083797Y true CN201083797Y (en) | 2008-07-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2007200281053U Expired - Lifetime CN201083797Y (en) | 2007-09-18 | 2007-09-18 | Portable insulating oil dielectric strength determinator |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102788937A (en) * | 2011-05-19 | 2012-11-21 | 上海华明电力设备制造有限公司 | Device for monitoring electric strength of insulating oil medium for on-load tapping switch on line |
| CN103364613A (en) * | 2013-07-15 | 2013-10-23 | 长城电器集团有限公司 | Voltage signal conditioning circuit of automatic reclosing lock breaker in time of electric leakage |
| CN108614202A (en) * | 2018-06-29 | 2018-10-02 | 中国能源建设集团山西电力建设有限公司 | Transformer insulated oil breakdown voltage on-site detecting device and detection method |
-
2007
- 2007-09-18 CN CNU2007200281053U patent/CN201083797Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102788937A (en) * | 2011-05-19 | 2012-11-21 | 上海华明电力设备制造有限公司 | Device for monitoring electric strength of insulating oil medium for on-load tapping switch on line |
| CN102788937B (en) * | 2011-05-19 | 2014-09-17 | 上海华明电力设备制造有限公司 | Device for monitoring electric strength of insulating oil medium for on-load tapping switch on line |
| CN103364613A (en) * | 2013-07-15 | 2013-10-23 | 长城电器集团有限公司 | Voltage signal conditioning circuit of automatic reclosing lock breaker in time of electric leakage |
| CN108614202A (en) * | 2018-06-29 | 2018-10-02 | 中国能源建设集团山西电力建设有限公司 | Transformer insulated oil breakdown voltage on-site detecting device and detection method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Shandong Huigong Instrument Co., Ltd. Assignor: Feng Junbo Contract fulfillment period: 2008.11.25 to 2016.11.24 Contract record no.: 2008370000184 Denomination of utility model: Portable insulating oil dielectric strength determinator Granted publication date: 20080709 License type: Exclusive license Record date: 20081215 |
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| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.11.25 TO 2016.11.24; CHANGE OF CONTRACT Name of requester: SHANDONG HUIGONG INSTRUMENTS CO., LTD. Effective date: 20081215 |
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| ASS | Succession or assignment of patent right |
Owner name: SHANDONG HUIGONG ELECTRIC CO., LTD. Free format text: FORMER OWNER: FENG JUNBO Effective date: 20140829 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 255031 ZIBO, SHANDONG PROVINCE TO: 255086 ZIBO, SHANDONG PROVINCE |
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| TR01 | Transfer of patent right |
Effective date of registration: 20140829 Address after: Four, building 135, block E, hi tech Pioneer Park, 255086 hi tech Zone, Zibo, Shandong Patentee after: Shandong Huigong Electric Co., Ltd. Address before: 255031 Shandong Province, Zibo city Zhangdian District Willow Road No. 51 Patentee before: Feng Junbo |
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| CX01 | Expiry of patent term |
Granted publication date: 20080709 |
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| CX01 | Expiry of patent term |