CN204101642U - A kind of Dielectric Posts device - Google Patents

A kind of Dielectric Posts device Download PDF

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Publication number
CN204101642U
CN204101642U CN201420575845.9U CN201420575845U CN204101642U CN 204101642 U CN204101642 U CN 204101642U CN 201420575845 U CN201420575845 U CN 201420575845U CN 204101642 U CN204101642 U CN 204101642U
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circuit
speed
signal processing
bit
communication transmission
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文峰
胡绍勇
王宇
尹贵伦
胡立信
刘钦
吕良飞
吕良越
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Guizhou Power Grid Co Ltd
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CHANGSHA TUOXING ELECTRONIC TECHNOLOGY Co Ltd
XINGYI POWER SUPPLY BUREAU
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Abstract

A kind of Dielectric Posts device, comprise 220V rectification circuit, current transformer, voltage transformer (VT), full bridge power inverse changing driving circuit, 24 bit synchronization high-speed A/D conversion circuits 1, digitial controller feed circuit I, myriad communication transmission circuit 1, 32 single-chip microcomputers add 32-bit number signal processing circuit 1 at a high speed, light communication transmission circuit 1, export variable high frequency high-tension transformer, radio communication transmission circuit 2, standard capacitor, modified twin-stage electric current induced magnetism modulation treatment circuit, skin peace level signal processing circuit, 24 bit synchronization high-speed A/D conversion circuits 2, optical fiber communication transmission circuit 2, 32 single-chip microcomputers add 32-bit number signal processing circuit 2 at a high speed, optical fiber feed circuit, digitial controller feed circuit 2 and inserted computer display.The utility model is simple to operate, and display interface is friendly, and whole dielectric loss and impedance measurement process are realized and autostore by intelligent display terminal, are widely used, intelligent and high-efficiency.

Description

A kind of Dielectric Posts device
Technical field
The utility model belongs to electrical measurement technical field, be specifically related to a kind of Dielectric Posts device based on frequency conversion high-tension transformer electric bridge vector operation, the insulating property that this device is applicable to the parts such as transformer in electric system, voltage transformer (VT), capacitance type potential transformer, current transformer, bushing, reactance calculate and assessment, and this device can effectively avoid Garton effect on the impact of insulation dielectric loss; This device also can be used for assessing and measure high tension apparatus (as power cable and annex), the dielectric loss of by-pass inductor, electric capacity, solid and fluid insulation consumes and impedance (dielectric loss and power factor); This device also can provide a set of efficient intelligent testing equipment and the effective dielectric test method of operating of complete set for the apparatus insulated Performance Evaluation of electric insulation.
Background technology
Because measuring media loss factor has higher sensitivity, apply widely so manufacture electrician and be obtained in power equipment hand-over and preventive test.Insulation fault greatly in high voltage electric equipment damage accident, it is then one of the most effective means of early warning insulation fault that insulation dielectric loss is measured, by measuring media loss, a series of defects that high voltage electric equipment insulate can be reflected, such as: in humidified insulation, aged deterioration, insulation, have air gap that electric discharge etc. occurs.For a long time, the measurement of dielectric loss and electric capacity adopts Schering bridge more at large, but due to the dielectric loss of high voltage electric equipment general all very little.Require high to measuring accuracy, in-site measurement is easily subject to various interference again, therefore, the dielectric loss measuring high voltage electric equipment at the scene has larger difficulty accurate stable, particularly along with the raising of power transmission and transformation electric pressure, highfield serious interference, makes the dielectric loss measurement error of converting station high voltage electrical apparatus excessive, even becomes insincere.
Summary of the invention
Technical problem to be solved in the utility model is: solve above-mentioned prior art Problems existing, and a kind of Dielectric Posts device is provided, this device is simple to operate, display interface is friendly, whole dielectric loss and impedance measurement process are realized and autostore by intelligent display terminal, for equipment installation and maintenance craft provide reference frame, be widely used, intelligent and high-efficiency.
The technical solution adopted in the utility model is:
A kind of Dielectric Posts device, comprise 220V rectification circuit, current transformer, voltage transformer (VT), full bridge power inverse changing driving circuit, 24 bit synchronization high-speed A/D conversion circuits 1, digitial controller feed circuit I, radio communication transmission circuit 1, 32 single-chip microcomputers add 32-bit number signal processing circuit 1 at a high speed, optical fiber communication transmission circuit 1, export variable high frequency high-tension transformer, radio communication transmission circuit 2, standard capacitor, modified twin-stage electric current induced magnetism modulation treatment circuit, skin peace level signal processing circuit, 24 bit synchronization high-speed A/D conversion circuits 2, optical fiber communication transmission circuit 2, 32 single-chip microcomputers add 32-bit number signal processing circuit 2 at a high speed, optical fiber feed circuit, digitial controller feed circuit 2 and inserted computer display, 220V input in mains ac power supply is connected to 220V rectification circuit, digitial controller feed circuit 1, optical fiber feed circuit and inserted computer display simultaneously, 220V rectification circuit exports DC voltage and is connected to full bridge power inverse changing driving circuit, current transformer and voltage transformer (VT) are arranged on and export on variable high frequency high-tension transformer input circuit, current transformer output and voltage transformer (VT) output are all connected to 24 bit synchronization high-speed A/D conversion circuit 1,24 bit synchronization high-speed A/D conversion circuits 1 output connection high speeds, 32 single-chip microcomputers and add 32-bit number signal processing circuit 1, 32 single-chip microcomputers add 32-bit number signal processing circuit 1 output and connect full bridge power inverse changing driving circuit at a high speed, and full bridge power inverse changing driving circuit exports to be connected to and exports variable high frequency high-tension transformer, digitial controller feed circuit 1 export DC voltage and connect 24 bit synchronization high-speed A/D conversion circuits 1, at a high speed 32 single-chip microcomputers and add 32-bit number signal processing circuit 1, radio communication transmission circuit 1, optical fiber communication transmission circuit 1 and full bridge power inverse changing driving circuit, radio communication transmission circuit 1 adds 32-bit number signal processing circuit by serial communication port and high speed 32 single-chip microcomputers and is connected, and radio communication transmission circuit 1 is connected with radio communication transmission circuit 2 radio communication, at a high speed 32 single-chip microcomputers add 32-bit number signal processing circuit 1 and add 32-bit number signal processing circuit 2 by optical fiber communication transmission circuit 1 and optical fiber communication transmission circuit 2 and high speed 32 single-chip microcomputers and be connected and communicate, radio communication transmission circuit 2 is connected with inserted computer display, standard capacitor two ends connect the high-voltage output end and Pi An level signal processing circuit that export variable high frequency high-tension transformer respectively, product to be tested two ends then connect the high-voltage output end and modified twin-stage electric current induced magnetism modulation treatment circuit that export variable high frequency high-tension transformer respectively, modified twin-stage electric current induced magnetism modulation treatment circuit exports and is connected to again skin peace level signal processing circuit, skin peace level signal processing circuit exports and adds 32-bit number signal processing circuit 2 by being connected to 32 single-chip microcomputers at a high speed after 24 bit synchronization high-speed A/D conversion circuits 2, optical fiber feed circuit export and connect digitial controller feed circuit 2, and digitial controller feed circuit 2 export DC voltage, and Innovation of Connection type twin-stage electric current induced magnetism modulation treatment circuit, skin peace level signal processing circuit, 24 bit synchronization high-speed A/D conversion circuits 2, at a high speed 32 single-chip microcomputers add 32-bit number signal processing circuit 2 and optical fiber communication transmission circuit 2 respectively.
In technique scheme, described each circuit is the mature technology of existing electronic circuit.
Principle of work:
The utility model device adopts 32 single-chip microcomputers at a high speed to add 32-bit number signal processing circuit 1 and controls full bridge power inverse changing driving circuit, full bridge power inverse changing driving circuit drives high frequency high voltage transformer to produce 500v-100kv adjustable voltage and exports, the voltage signal frequency simultaneously realizing exporting is adjustable, its adjustable signal frequency range: 20hz-5khz.The high-pressure frequency-conversion voltage signal that device exports is connected to product to be tested and standard capacitor upper end, thus provides variable ratio frequency changer high-voltage power supply for test article and standard capacitor.Product to be tested lower end is connected to modified twin-stage current comparator, standard capacitor lower end is connected to digital signal modulate circuit, modified twin-stage current comparator exports and is connected to digital signal modulate circuit, digital signal modulate circuit will receive current comparator output current and standard capacitor output current carries out filter amplifying processing, signal after filter amplifying processing is input to 24 bit synchronization high-speed A/D conversion circuits 2, the dual-channel analog signal received is converted to digital signal by high-speed synchronous analog to digital converter, digital signal after conversion is input to 32 single-chip microcomputers at a high speed and adds 32-bit number signal processing circuit 2, high speed 32 single-chip microcomputers add 32-bit number signal processing circuit 2 and the digital signal received are carried out rapid finite shock response filtering process again, signal after process calculates the dielectric loss value of product to be tested by electric bridge vector operation, pass through dielectric loss value, product to be tested current value, standard capacitor current value calculates the capacitance of product to be tested, power factor (PF), the dielectric loss value measured, product to be tested capacitance, power factor, simultaneously at a high speed 32 single-chip microcomputers add 32-bit number signal processing circuit 2 and have and measure test sample humiture and ambient temperature and humidity function, the warm and humid angle value of the correlation parameter after calculating and measurement adds 32-bit number signal processing circuit 1 by optical fiber communication circuit transmission to high speed 32 single-chip microcomputers, at a high speed 32 single-chip microcomputers add 32-bit number signal processing circuit 1 and the related data received is sent to inserted computer display by radio communication transmission circuit shows, inserted computer display is provided with device display and control software, this software mainly realizes the voltage that regulable control high pressure transformation exports, frequency values size, the related data that vision-control control and measurement feeds back to is shown simultaneously, store, curve shows, this software also has powerful Data Analysis Services function, such as: by built-in different insulative material temperature database, automatic calibration is carried out to reference temperature, predefined curve setting can be expanded easily by user and change, the conversion of parametric line, atlas analysis, signal is extracted, and shows the slow tendency of user-selected measured value simultaneously.
The utility model circuit structure mainly comprises computer monitor, 220V inputs, 220V rectification circuit, current transformer, voltage transformer (VT), full bridge power inverse changing driving circuit, 24 bit synchronization high-speed A/D conversion circuits 1, digitial controller feed circuit 1, radio communication transmission circuit 1, 32 single-chip microcomputers add 32-bit number signal processing circuit 1 at a high speed, optical fiber communication transmission circuit 1, export variable high frequency high-tension transformer, radio communication transmission circuit 2, test sample, standard capacitor, modified twin-stage electric current induced magnetism modulation treatment circuit, skin peace level signal processing circuit, 24 bit synchronization high-speed A/D conversion circuits 2, optical fiber communication transmission circuit 2, 32 single-chip microcomputers add 32-bit number signal processing circuit 2 at a high speed, optical fiber feed circuit and inserted computer display.
220V input circuit mainly provides alternating current 220V power supply to input to 220V rectification circuit, digitial controller feed circuit 1, inserted computer display, optical fiber feed circuit, simultaneously for device provides enough measured powers.
Input 220V alternating voltage is mainly converted to DC voltage and is supplied to full bridge power inverse changing driving circuit and powers by 220V ac rectifier.
Current transformer is mainly converted to the less secondary current of numerical value load output current and is supplied to 24 bit synchronization high-speed A/D conversion circuits 1; the current transformer output current received is converted to digital signal and is supplied at a high speed 32 single-chip microcomputers and adds 32-bit number signal processing circuit 1 by 24 bit synchronization high-speed A/D conversion circuits 1; this circuit 1 carries out protection according to the digital signal received to device and judges; judgment means whether overcurrent; as overcurrent appears in device; then treatment circuit 1 enters corresponding unit protection program, makes the prompting of voice sound and light alarm simultaneously.
Voltage transformer (VT) is mainly converted to the less secondary voltage of numerical value load output voltage and is supplied to 24 bit synchronization high-speed A/D conversion circuits 1, the voltage transformer (VT) output voltage received is converted to digital signal and is supplied at a high speed 32 single-chip microcomputers and adds 32-bit number signal processing circuit 1 by this analog to digital conversion circuit 1, the voltage signal fed back to is carried out protection to device and judges by treatment circuit 1, judgment means whether overvoltage, as overvoltage appears in device, then treatment circuit 1 enters corresponding unit protection program, make the prompting of voice sound and light alarm simultaneously, treatment circuit 1 carrys out by the voltage signal form the basis fed back to the amplitude that regulating device exports high pressure simultaneously.
Full bridge power inverse changing driving circuit mainly drives high frequency high voltage transformer, for high frequency high voltage transformer provides enough driving powers, full bridge power inverse changing driving circuit receives the frequency modulation and voltage modulation pulse-width signal adding the output of 32-bit number signal processor feed circuit 1 from high speed 32 single-chip microcomputers, controls the realization of full bridge power inverse changing driving circuit the AC signal that the direct current that rectification circuit exports is converted to frequency amplitude variable is outputted to high frequency high voltage transformer by pulse-width signal.
24 bit synchronization high-speed A/D conversion circuits 1 are the current and voltage signals that exports of received current mutual inductor, voltage transformer (VT) mainly, the current and voltage signals received is converted to digital signal simultaneously and is supplied at a high speed 32 single-chip microcomputers and adds 32-bit number signal processor feed circuit 1.
The 220V AC power of input is mainly converted to DC voltage+3.3V three groups ,+5V three groups ,+12V two groups ,-12V one group by digitial controller feed circuit 1, and wherein one group of+12V ,-12V ,+5V ,+3.3V export and is supplied to 24 bit synchronization high-speed A/D conversion circuits 1; One group of+5V ,+3.3V output is supplied to 32 single-chip microcomputers at a high speed and adds 32-bit number signal processing circuit 1; One group of+3.3V exports and is supplied to radio communication transmission circuit 1; One group of+5V exports and is supplied to optical fiber communication transmission circuit 1; One group of+12V ,+5V export and are supplied to full bridge power inverse changing driving circuit.
Radio communication transmission circuit 1 mainly receives at a high speed 32 single-chip microcomputers by serial communication port and adds the control display data that 32-bit number signal processing circuit 1 sends out, the control display parameter data received is sent by circuit wireless data send mode, radio communication transmission circuit 1 also receives the associated control parameters data that radio communication transmission circuit 2 returns simultaneously, and the controling parameters data received are dealt into 32 single-chip microcomputers at a high speed by serial communication port and add 32-bit number signal processing circuit 1 by radio communication transmission circuit 1.
At a high speed 32 single-chip microcomputers add that 32-bit number signal processing circuit 1 mainly receives that high-speed synchronous 24 analog to digital conversion circuits 1 feed back to digital signal, the data received are carried out finite impulse response data filtering smoothing processing by treatment circuit 1, data after process are input to treatment circuit 1 integral separation PID controling algorithm and carry out closed-loop control, integral separation PID controling algorithm calculates the controlled quentity controlled variable exported and adds 32-bit number signal processing circuit 1 internal pulse-width modulation circuit by high speed 32 single-chip microcomputers, after the process of width modulation counting circuit, be converted to square-wave signal output to power control circuit.The adjusting size of variable voltage signal that high-tension transformer exports is that the voltage signal by feeding back to realizes in conjunction with integral separation PID controling algorithm closed-loop control, goes the dutycycle size of adjusting pulsewidth counting circuit to realize output voltage size adjustment by the Output rusults after integral separating PID calculates.High-tension transformer output signal frequency is then add by changing 32 single-chip microcomputers at a high speed the frequency that 32-bit number signal processing circuit 1 internal pulse-width modulation circuit timer period changes output voltage.At a high speed 32 single-chip microcomputers add 32-bit number signal processing circuit 1 also Coordination Treatment from the related data information of optical receiving circuit and wireless receiving circuit 1, set up information interaction by independent media's interface between fiber optic circuit and treatment circuit 1, adopt independent media interface can greatly improve 32 single-chip microcomputers at a high speed add 32-bit number signal processing circuit 1 and at a high speed 32 single-chip microcomputers add real-time and the reliability of data interaction between 32-bit number signal processing circuit 2, high speed 32 single-chip microcomputers are added 32-bit number signal processing circuit 1 and are received the dielectric loss value coming from high speed 32 single-chip microcomputers and add 32-bit number signal processing circuit 2 by optical fiber communication circuit 1, capacitance, temperature value, humidity value, current value, frequency values, power factor value.Then adopt serial communication mode to carry out data to transmit with data message mutual between radio communication circuit 1 and treatment circuit 1, at a high speed 32 single-chip microcomputers add 32-bit number signal processing circuit 1 by serial communication interface by self process parameter and come from the dielectric loss value of optical fiber communication circuit, capacitance, temperature value, humidity value, current value, frequency values, power factor value be transferred to radio communication circuit 1.
Optical fiber communication circuit 1 mainly realize 32 single-chip microcomputers at a high speed to add 32-bit number signal processing circuit 1 and at a high speed 32 single-chip microcomputers add between 32-bit number signal processing circuit 2 and communicate to connect, be responsible for that high speed 32 single-chip microcomputers are added 32-bit number signal processing circuit 1 communication data electric signal simultaneously and be converted to light signal, then by fiber optic cables, Signal transmissions is gone out.Fiber optic circuit 1 and at a high speed 32 single-chip microcomputer information interactions added between 32-bit number signal processing circuit 2 are undertaken by independent media's interface.
Export variable high frequency high-tension transformer mainly to realize low pressure to be converted to high voltage, it consists of iron core and primary and secondary winding.Use output variable high frequency high-tension transformer mainly to reduce the weight of equipment and the volume of equipment in a device, the volume adopting high frequency high voltage transformer to design is the half of power frequency high voltage volume of transformer.
Radio communication transmission circuit 2 is the associated control parameters data that send out of receiving radio data transmission circuit 1 mainly, and the related data that radio communication transmission circuit 2 receives is sent to inserted computer display by serial communication interface and shows.Radio communication transmission circuit 2 is also by the controling parameters that serial communication port reception inserted computer display returns simultaneously, and the controling parameters received carries radio communication by radio communication transmission circuit 2 and is sent to radio communication transmission circuit 1.
Test sample mainly exports measuring current under High Pressure at high frequency high voltage transformer, this current signal mainly for calculating the dielectric loss value of test sample, capacitance provides design conditions.
Standard capacitor mainly exports generation one normalized current under High Pressure at high frequency high voltage transformer, and mainly capacity current in this normalized current, its current in resistance property is negligible.
If modified twin-stage electric current induced magnetism modulation treatment main circuit is by the nanocrystalline annular core of amorphous fe-base, primary coil, twin-stage secondary coil forms, the modified twin-stage electric current induced magnetism modulation treatment circuit that device uses adopts unique double layer screen and the filtering external disturbance of magnetic modulation technique efficiency, reduce outside input small-signal loss, thus make the modified twin-stage electric current induced magnetism modulation treatment circuit in device effectively can transmit skin peace level Small Current Signal, the modified twin-stage electric current induced magnetism modulation treatment circuit that device uses also can evade the uncertainty that uncertain factor that CT and mutual inductor introduce brings dielectric loss measurement effectively.
Modified twin-stage electric current induced magnetism modulation treatment circuit and standard capacitor output current small-signal are mainly carried out signal amplification and filtering process by skin peace level signal processing circuit, the signal after process are input to 24 bit synchronization high-speed A/D conversion circuits 2 simultaneously.
24 bit synchronization high-speed A/D conversion circuits 2 are the current signal that exports of the modified twin-stage electric current induced magnetism modulation treatment circuit that exports of signal processing circuit and standard capacitor current signal, standard capacitor mainly, the current signal received is converted to digital signal simultaneously and is supplied at a high speed 32 single-chip microcomputers and adds 32-bit number signal processor feed circuit 2.
32 single-chip microcomputers add digital signal, the test temperature value of sample, the warm and humid angle value of test environment that 32-bit number signal processing circuit 2 mainly realizes gathering high-speed synchronous 24 analog to digital conversion circuits 2 outputs at a high speed; Realize finite impulse response filtering filtering algorithm, the noise in the further filtered signal of this algorithm and undesired signal; Realize the extraction that bridge type vector operation carries out signal, from bridge type vector process, calculate dielectric loss value and impedance (dielectric loss and power factor).At a high speed 32 single-chip microcomputers add the related data that 32-bit number signal processing circuit 2 gathers and calculate and are sent to optic fiber converter by independent media's interface of circuit self, by optic fiber converter realize 32 single-chip microcomputers at a high speed add 32-bit number signal processing circuit 2 and at a high speed 32 single-chip microcomputers add the information interaction between 32-bit number signal processing circuit 1.
Optical fiber communication circuit 2 mainly realize 32 single-chip microcomputers at a high speed to add 32-bit number signal processing circuit 2 and at a high speed 32 single-chip microcomputers add between 32-bit number signal processing circuit 1 and communicate to connect, be responsible for that high speed 32 single-chip microcomputers are added 32-bit number signal processing circuit 2 communication data electric signal simultaneously and be converted to light signal, then by fiber optic cables, Signal transmissions is gone out.Fiber optic circuit 2 and at a high speed 32 single-chip microcomputer information interactions added between 32-bit number signal processing circuit 2 are undertaken by independent media's interface.
Input optical signal is mainly converted to DC voltage+3.3V three groups ,+5V three groups ,+12V two groups ,-12V one group by digitial controller feed circuit 2, and wherein one group of+12V ,-12V ,+5V ,+3.3V export and is supplied to 24 bit synchronization high-speed A/D conversion circuits 2; One group of+5V ,+3.3V output is supplied to 32 single-chip microcomputers at a high speed and adds 32-bit number signal processing circuit 2; One group of+5V exports and is supplied to optical fiber communication transmission circuit 2; One group of+12V ,+12V output is supplied to skin peace level signal processing circuit and carries out amplification process; One group of+12V ,+12V export and are supplied to modified twin-stage electric current induced magnetism modulation treatment circuit.
It is luminous energy that optical fiber feed circuit mainly realize electric energy conversion, the luminous energy after conversion by optical cable transmission to power supply part.If use this main circuit to realize isolated from power between metering circuit and high-frequency high-voltage source circuit in device, thus ensure that metering circuit is for electrical stability.
Inserted computer display mainly realizes power adjustment process and measuring process graphic software platform software, realizes data analysis and signal processing function simultaneously and carries out data transmit-receive by serial line interface and radio communication transmission circuit 2.The wherein main display and control amount of power adjustment process, controlled frequency, electric power output voltage and electric power output voltage change curve; Wherein measuring process mainly shows dielectric loss value, the capacitance of test sample product, the test frequency of test sample, Resonance Wave Composition in measuring-signal, applied power S, active-power P, reactive power Q, environment temperature, insulator temperature, relative humidity, display interface intuitively reflects each parameter value of test process and correlation parameter curve comprehensively.Secondly the running status that face display interface possesses perfect data storages, data analysis, printing, test parameter inquiry are high voltage electric equipment and quality provide can review foundation, PC data storage cycles is long, the data produced in test process are directly stored as the standard electronic document form needed for user, and facilitating test client like this provides unit to open product operational report for high voltage electric equipment.
The utility model major function is as follows:
(1), device exports high tension voltage and automatically regulates, the automatic control realization of device adjustment employing intelligent PID.
(2), device High voltage output signal frequency regulates automatically.
(3), device has over-current over-voltage protection function.
(4), device has harmonic measurement function.
(5), measurement device circuit has precise synchronization measurement function.
(6), between measurement device circuit and control circuit use optical fiber communication, thus realize signal isolation very well.
(7), radio communication is adopted between control circuit and inserted computer circuit.
(8), between embedded display and control circuit, adopt wireless automatic frequency adjustment technology, well can avoid electromagnetic interference (EMI), thus ensure the reliability of wireless data transceiving.
(9), measurement device circuit is powered employing optical functions.
(10), device has modified twin-stage shielding magnetic feedback compensation.
(11), device has temperature automatic calibration function.
(12), embed software for display and there is powerful signal transacting and signal analysis function.Its signal processing function has systematic analysis curve, collection of illustrative plates show the slow tendency of user-selected measured value.The build-in test data trend comparative analysis of signal analysis function a period of time, the analysis of different sample test parameter comparison, the setting of test parameter threshold value etc.
The utility model is the high speed development along with electronic measurement technique and power industry, the full-automatic dielectric loss measuring set of accurate frequency conversion high-tension transformer electric bridge vector thereupon arisen at the historic moment, this device is simple to operate, display interface good friend, whole dielectric loss is surveyed and impedance measurement process passes through intelligent display terminal control realization, intelligent display terminal can carry out autostore to the state of insulation parameter of measured equipment, and can be used as installation and the maintenance craft reference frame of equipment.This kind of application of installation is in extensive range, for facilities and equipments insulation ag(e)ing repair based on condition of component provides a kind of important testing evaluation means.
Accompanying drawing explanation
Fig. 1 is the utility model structured flowchart.
Embodiment
See Fig. 1, Dielectric Posts device of the present utility model, comprise 220V rectification circuit, current transformer, voltage transformer (VT), full bridge power inverse changing driving circuit, 24 bit synchronization high-speed A/D conversion circuits 1, digitial controller feed circuit I, radio communication transmission circuit 1, 32 single-chip microcomputers add 32-bit number signal processing circuit 1 at a high speed, optical fiber communication transmission circuit 1, export variable high frequency high-tension transformer, radio communication transmission circuit 2, standard capacitor, modified twin-stage electric current induced magnetism modulation treatment circuit, skin peace level signal processing circuit, 24 bit synchronization high-speed A/D conversion circuits 2, optical fiber communication transmission circuit 2, 32 single-chip microcomputers add 32-bit number signal processing circuit 2 at a high speed, optical fiber feed circuit, digitial controller feed circuit 2 and inserted computer display, 220V input in mains ac power supply is connected to 220V rectification circuit, digitial controller feed circuit 1, optical fiber feed circuit and inserted computer display simultaneously, 220V rectification circuit exports DC voltage and is connected to full bridge power inverse changing driving circuit, current transformer and voltage transformer (VT) are arranged on and export on variable high frequency high-tension transformer input circuit, current transformer output and voltage transformer (VT) output are all connected to 24 bit synchronization high-speed A/D conversion circuit 1,24 bit synchronization high-speed A/D conversion circuits 1 output connection high speeds, 32 single-chip microcomputers and add 32-bit number signal processing circuit 1, 32 single-chip microcomputers add 32-bit number signal processing circuit 1 output and connect full bridge power inverse changing driving circuit at a high speed, and full bridge power inverse changing driving circuit exports to be connected to and exports variable high frequency high-tension transformer, digitial controller feed circuit 1 export DC voltage and connect 24 bit synchronization high-speed A/D conversion circuits 1, at a high speed 32 single-chip microcomputers and add 32-bit number signal processing circuit 1, radio communication transmission circuit 1, optical fiber communication transmission circuit 1 and full bridge power inverse changing driving circuit, radio communication transmission circuit 1 adds 32-bit number signal processing circuit by serial communication port and high speed 32 single-chip microcomputers and is connected, and radio communication transmission circuit 1 is connected with radio communication transmission circuit 2 radio communication, at a high speed 32 single-chip microcomputers add 32-bit number signal processing circuit 1 and add 32-bit number signal processing circuit 2 by optical fiber communication transmission circuit 1 and optical fiber communication transmission circuit 2 and high speed 32 single-chip microcomputers and be connected and communicate, radio communication transmission circuit 2 is connected with inserted computer display, standard capacitor two ends connect the high-voltage output end and Pi An level signal processing circuit that export variable high frequency high-tension transformer respectively, product to be tested two ends then connect the high-voltage output end and modified twin-stage electric current induced magnetism modulation treatment circuit that export variable high frequency high-tension transformer respectively, modified twin-stage electric current induced magnetism modulation treatment circuit exports and is connected to again skin peace level signal processing circuit, skin peace level signal processing circuit exports and adds 32-bit number signal processing circuit 2 by being connected to 32 single-chip microcomputers at a high speed after 24 bit synchronization high-speed A/D conversion circuits 2, optical fiber feed circuit export and connect digitial controller feed circuit 2, and digitial controller feed circuit 2 export DC voltage, and Innovation of Connection type twin-stage electric current induced magnetism modulation treatment circuit, skin peace level signal processing circuit, 24 bit synchronization high-speed A/D conversion circuits 2, at a high speed 32 single-chip microcomputers add 32-bit number signal processing circuit 2 and optical fiber communication transmission circuit 2 respectively.
Above-mentioned each circuit is the mature technology of existing electronic circuit.
Below in conjunction with accompanying drawing, the utility model electricity principle is described in further detail:
The electric theory diagram of the utility model structure as shown in Figure 1, the utility model simplifies Insulating Performance for HV Electric Equipments appraisal procedure and high voltage electric equipment dielectric loss measurement process.Improve the accuracy of Insulating Performance for HV Electric Equipments test and the precision of medium damage angular measurement; Improve Insulating Performance for HV Electric Equipments testing efficiency.The utility model realizes testing without the need to the Insulating Performance for HV Electric Equipments of manual intervention, reduces the measuring error that human factor participates in bringing.High-voltage power voltage required in the utility model test process is produced by device auto-adjustment control, High voltage output magnitude of voltage by device self with the closed-loop control of mutual inductor feedback voltage realize, thus it is accurately adjustable to realize output voltage Automatic continuous.The current comparator adopted in the utility model is improved cascade induction type structural design, includes magnetic circuit shielding, Flux modulation compensator, distribution parameter compensator in its structure.The utility model adopts 32 single-chip microcomputers at a high speed to add 32-bit number signal processor and realizes High voltage output voltage close loop regulating and controlling.This device voltage regulation limits is wide, voltage range: 500V-100KV; Voltage-regulation resolution is: 0.4V, voltage regulation accuracy are high, its precision: ± 0.2% rdg ± 0.3V.The utility model adopts 32 single-chip microcomputers at a high speed to add 32-bit number signal processor and realizes the adjustment of High voltage output voltage signal frequency.This device frequency-tuning range is: 20HZ-5KHZ, and its frequency adjustment precision is: 1HZ.The utility model adopts synchronous 24 analog to digital converters of high-speed, high precision to gather test product electric current and standard capacitor electric current.The analog to digital converter sampling rate adopted in device is high, and this analog to digital converter input simultaneously with Electromagnetic interference filter and gain adjustable amplifier, thus reduces external disturbance greatly.The utility model high-voltage power supply adopts high-frequency transformer to be produced by full-bridge inverting mode, and the little quality of power volume of this patten's design is light, is very suitable for portable field testing tool and uses.Because device output voltage is high pressure, ensure measuring accuracy again simultaneously, therefore device adopts high-voltage power supply and control circuit and metering circuit isolation design, adopt optical fiber communication and optical fiber to power before control circuit and metering circuit and carry out Phototube Coupling process, communication is adopted to carry out data communication process between backstage computer and control circuit, by ensureing that measuring process is safe and reliable with the process of upper type.Dielectric loss value, the capacitance of sample, high-voltage power supply output voltage values, the test frequency of the upper computer software display test sample that the utility model provides, line frequency, applied power S, active-power P, reactive power Q, environment temperature, insulator temperature, relative humidity, display interface intuitively reflects each parameter value of test process and correlation parameter curve comprehensively.The utility model provides friendly man-machine interface display, there is perfect data storage, data analysis, printing, test parameter inquiry can review foundation for the running status of high voltage electric equipment and quality provide, PC data storage cycles is long, the data produced in test process are directly stored as the standard electronic document form needed for user, and facilitating test client like this provides unit to open product operational report for high voltage electric equipment.The utility model adopts control mode far away to load high pressure and realizes the long-range continuous adjustment of output voltage by upper computer software, and the current voltage swing be carried on test sample and standard capacitor has independent window to carry out display setting on upper computer software.
Method of operating of the present utility model is:
By resolving the packet that radio communication circuit 2 is passed back, calculate according to return measurement data packet analysis, control treatment circuit associated control parameters is set, after controling parameters is set, synchronous measurement circuit feeds back to control treatment circuit the measurement parameter received, the measurement data returned is separated control algolithm calculating Output rusults with the parameters received by Intelligent Integration and is transferred to driving circuit by control treatment circuit, driving circuit generation drive singal outputs to high-voltage power circuit and carries out frequency amplitude adjustment, and high-voltage power supply outputs to test sample and standard capacitance circuit.The size of current that precision synchronous metering circuit synchro measure test sample and standard capacitor export, the data that precision synchronous metering circuit measures are sent to measurement processing analysis circuit, measurement processing analysis circuit calculates dielectric dissipation factor result by electric bridge vector operation, result after calculating is sent to control treatment circuit by fiber optic circuit, and control treatment circuit is sent to inserted computer display by radio communication transmission circuit and shows.
Voltage, the current signal of synchro control metering circuit synchronous acquisition Harmonic Current circuit and triangular pulse power circuit, high-speed data processor in synchro control metering circuit combines the voltage and current parameter that the parameters that receives and synchro control metering circuit collect, carry artificial intelligence FUZZY ALGORITHMS FOR CONTROL by synchro control metering circuit and control Harmonic Current circuit, triangular pulse power circuit, adjustable precision condenser network, adjustable precision resistance circuit, thus realize adjusted in concert Harmonic Current circuit and triangular pulse power circuit output state signal.When regulating, Harmonic Current and triangular pulse power circuit output signal amplitude and phase place are equal, then synchro control metering circuit passes controling parameters and measurement parameter back calculating parametric controller main frame by optical fiber, with this simultaneously, calculate parametric controller task data processing enter and regulate adjustable precision condenser network, adjustable precision resistance circuit from motion tracking, precision current metering circuit measures capacity current and current in resistance property value in adjustment process above in real time, and capacity current and current in resistance property Value Data are passed back by optical fiber and calculated parametric controller main frame and carry out showing and waveform drawing.Be more than the current in resistance property adjustment under a voltage magnitude, if current in resistance property regulates under will realizing multiple voltage magnitude, then repeated to arrange above adjustment process.
The utility model Specifeca tion speeification is as follows:
(1), high-voltage power supply output voltage range is: 500V-100KV.
(2), High voltage output resolution is: 0.4V, High voltage output precision is: ± 0.3% reading ± 0.4V.
(3), high-voltage power supply output frequency is adjustable, and its frequency-tuning range is: 20hz-5khz, and its frequency adjustment precision is: 1hz.
(4), Dielectric Posts scope is: its measuring accuracy of 0-100, its dissipation factor resolution 1*10-6 is: ± 0.5% reading ± 1*10-5.
(5), power-factor measurement scope is: its measuring accuracy of 0-1, its dissipation factor resolution 1*10-6 is: ± 0.5% reading ± 1*10-5.
(6), capacitive measurement scales: >=0.01 pF, resolution: 0.001pF, precision: ± 0.1%*rdg ± 0.01pF.
(7), sample current measuring range is tested: 20uA ~ 700m A, resolution: 0.1 uA, precision: ± 1%* reading ± 0.1 uA.
(8), standard capacitor current measuring range: 20uA ~ 12 A, resolution: 0.1 uA, precision: ± 1%* reading ± 0.1 uA.
(9), applied power S measurement range: >=1 MVA, resolution: 0.1 mVA, measuring accuracy: ± 0.5% reading ± 1mVA.
(10), applied power P measurement range: >=1 MW, resolution: 0.1 mw, measuring accuracy: ± 0.5% reading ± 1 mw.
(11), applied power Q measurement range: >=1 mvar, resolution: 0.1 mvar, measuring accuracy: ± 0.5% reading ± 1 mvar.
(12), Measuring Time is: 3s/ time.

Claims (1)

1. a Dielectric Posts device, it is characterized in that, comprise 220V rectification circuit, current transformer, voltage transformer (VT), full bridge power inverse changing driving circuit, 24 bit synchronization high-speed A/D conversion circuits 1, digitial controller feed circuit I, radio communication transmission circuit 1, 32 single-chip microcomputers add 32-bit number signal processing circuit 1 at a high speed, optical fiber communication transmission circuit 1, export variable high frequency high-tension transformer, radio communication transmission circuit 2, standard capacitor, modified twin-stage electric current induced magnetism modulation treatment circuit, skin peace level signal processing circuit, 24 bit synchronization high-speed A/D conversion circuits 2, optical fiber communication transmission circuit 2, 32 single-chip microcomputers add 32-bit number signal processing circuit 2 at a high speed, optical fiber feed circuit, digitial controller feed circuit 2 and inserted computer display, 220V input in mains ac power supply is connected to 220V rectification circuit, digitial controller feed circuit 1, optical fiber feed circuit and inserted computer display simultaneously, 220V rectification circuit exports DC voltage and is connected to full bridge power inverse changing driving circuit, current transformer and voltage transformer (VT) are arranged on and export on variable high frequency high-tension transformer input circuit, current transformer output and voltage transformer (VT) output are all connected to 24 bit synchronization high-speed A/D conversion circuit 1,24 bit synchronization high-speed A/D conversion circuits 1 output connection high speeds, 32 single-chip microcomputers and add 32-bit number signal processing circuit 1, 32 single-chip microcomputers add 32-bit number signal processing circuit 1 output and connect full bridge power inverse changing driving circuit at a high speed, and full bridge power inverse changing driving circuit exports to be connected to and exports variable high frequency high-tension transformer, digitial controller feed circuit 1 export DC voltage and connect 24 bit synchronization high-speed A/D conversion circuits 1, at a high speed 32 single-chip microcomputers and add 32-bit number signal processing circuit 1, radio communication transmission circuit 1, optical fiber communication transmission circuit 1 and full bridge power inverse changing driving circuit, radio communication transmission circuit 1 adds 32-bit number signal processing circuit by serial communication port and high speed 32 single-chip microcomputers and is connected, and radio communication transmission circuit 1 is connected with radio communication transmission circuit 2 radio communication, at a high speed 32 single-chip microcomputers add 32-bit number signal processing circuit 1 and add 32-bit number signal processing circuit 2 by optical fiber communication transmission circuit 1 and optical fiber communication transmission circuit 2 and high speed 32 single-chip microcomputers and be connected and communicate, radio communication transmission circuit 2 is connected with inserted computer display, standard capacitor two ends connect the high-voltage output end and Pi An level signal processing circuit that export variable high frequency high-tension transformer respectively, product to be tested two ends then connect the high-voltage output end and modified twin-stage electric current induced magnetism modulation treatment circuit that export variable high frequency high-tension transformer respectively, modified twin-stage electric current induced magnetism modulation treatment circuit exports and is connected to again skin peace level signal processing circuit, skin peace level signal processing circuit exports and adds 32-bit number signal processing circuit 2 by being connected to 32 single-chip microcomputers at a high speed after 24 bit synchronization high-speed A/D conversion circuits 2, optical fiber feed circuit export and connect digitial controller feed circuit 2, and digitial controller feed circuit 2 export DC voltage, and Innovation of Connection type twin-stage electric current induced magnetism modulation treatment circuit, skin peace level signal processing circuit, 24 bit synchronization high-speed A/D conversion circuits 2, at a high speed 32 single-chip microcomputers add 32-bit number signal processing circuit 2 and optical fiber communication transmission circuit 2 respectively.
CN201420575845.9U 2014-10-08 2014-10-08 A kind of Dielectric Posts device Active CN204101642U (en)

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Application Number Priority Date Filing Date Title
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107132421A (en) * 2017-06-08 2017-09-05 安徽富吉电容有限责任公司 A kind of capacitor apparatus for monitoring working state based on Internet of Things
CN108226654A (en) * 2018-01-31 2018-06-29 深圳供电局有限公司 A kind of full-automatic dielectric loss measurement system
CN110618365A (en) * 2019-11-03 2019-12-27 西南交通大学 Low-voltage cable state evaluation method based on dielectric response characteristics
CN111175556A (en) * 2020-01-19 2020-05-19 付涛阳 Novel current transformer and implementation method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107132421A (en) * 2017-06-08 2017-09-05 安徽富吉电容有限责任公司 A kind of capacitor apparatus for monitoring working state based on Internet of Things
CN108226654A (en) * 2018-01-31 2018-06-29 深圳供电局有限公司 A kind of full-automatic dielectric loss measurement system
CN110618365A (en) * 2019-11-03 2019-12-27 西南交通大学 Low-voltage cable state evaluation method based on dielectric response characteristics
CN110618365B (en) * 2019-11-03 2021-06-15 西南交通大学 Low-voltage cable state evaluation method based on dielectric response characteristics
CN111175556A (en) * 2020-01-19 2020-05-19 付涛阳 Novel current transformer and implementation method

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