CN203025313U - High-voltage variable-frequency series resonance test power supply - Google Patents

High-voltage variable-frequency series resonance test power supply Download PDF

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CN203025313U
CN203025313U CN 201220689493 CN201220689493U CN203025313U CN 203025313 U CN203025313 U CN 203025313U CN 201220689493 CN201220689493 CN 201220689493 CN 201220689493 U CN201220689493 U CN 201220689493U CN 203025313 U CN203025313 U CN 203025313U
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frequency
wire
voltage
circuit module
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黄新波
程文飞
王霄宽
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Xian Polytechnic University
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Xian Polytechnic University
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Abstract

The utility model discloses a high-voltage variable-frequency series resonance test power supply comprising a variable-frequency power master controller which is connected with an exciting transformer through a lead, wherein the exciting transformer is connected with an LC resonance circuit module through the lead, and the LC resonance circuit module is connected with the variable-frequency power master controller through the lead. The high-voltage variable-frequency series resonance test power supply provided by the utility model is capable of fast responding an automatic frequency-modulated power terminal device in a series resonant withstand voltage test and monitoring a high-voltage device before leaving the factory in real time. Moreover, the voltage class can be high or ultrahigh and the frequency is adjustable in the range of 30-300Hz.

Description

High-pressure frequency-conversion series resonance test power supply
Technical field
The utility model belongs to high-tension unit monitoring equipment technical field, relates to a kind of high-pressure frequency-conversion series resonance test power supply.
Background technology
Electric device will be subject to the frequent effect of maximum operating voltage, lightning surge, internal overvoltage when operation, causing having in the electric device operation troubles is insulation fault greatly.In addition, the electric device that is moving is inner can hide some insulation defects, as centrality defective, distributivity defective, hide when wherein the insulation defect of electric device has some to make, other in operational process under extraneous environmental activity and produce.Therefore, electric device before putting into operation and the electric device that is moving all need to carry out dielectric voltage withstand test.
Withstand voltage test is exactly by the trial voltage standard, electric device to be applied the trial voltage more much higher than its operating voltage, and certain time, and in order to the reliability of demo plant insulation, the grade of trial voltage just is called the dielectric level of electric device.Standard GB/T 311/83 " Insulation Coordination of high-voltage power transmission device, high-voltage test techniques " has all been made regulation to the trial voltage parameter of various electric pressure devices, can select according to the specific requirement of inspection procedure in real work.
What at first withstand voltage test will solve is exactly high-voltage test electric power, and on the whole, high pressure and high-voltage alternating device Insulation Test power supply have three kinds: Cascade testing transformer, power transformer and series resonant equipment.Multiplex was the Cascade testing transformer in the past.Generally, when single transformer voltage surpassed 500KV, expense can increase sharply with the rising of voltage.When the transformer rated voltage raise, the increase trend of its volume and weight surpassed the three cubed ascending velocity of rated voltage.If therefore produce the above voltage of 1000KV level with a transformer, cost is improved, volume is excessive.Usually use according to electric pressure and the class of insulation several voltage devices are connected in series, but the utilization factor of whole device is low in this case, also has the shortcomings such as low pressure winding leakage reactance, seldom adopt now this method.The principle of power transformer and testing transformer is basic identical.High-pressure frequency-conversion series resonance test power supply is to utilize the LC resonance principle, makes test product can be subject to the effect of ac high voltage, and the grade of rated voltage of electric supply installation can reach high pressure, UHV (ultra-high voltage) and capacity and greatly reduce, and is easy to carry, comparatively general at present.
Summary of the invention
The purpose of the present utility model is to provide a kind of high-pressure frequency-conversion series resonance test power supply, can not only respond fast series resonance withstand voltage test automatic frequency adjustment power terminal device, high-tension unit before dispatching from the factory is made Real-Time Monitoring, and electric pressure can reach high pressure, UHV (ultra-high voltage), and frequency is adjustable at 30Hz～300Hz.
Technical scheme of the present utility model is, high-pressure frequency-conversion series resonance test power supply, include the variable-frequency power sources primary controller, the variable-frequency power sources primary controller is connected with exciting transformer by wire, exciting transformer is connected with LC resonant tank module by wire, and LC resonant tank module is connected with the variable-frequency power sources primary controller by wire.
Characteristics of the present utility model also are,
The variable-frequency power sources primary controller includes DSP core board module and the uncontrollable rectification circuit module of three phase full bridge; DSP core board module is connected with respectively holding circuit module, human-computer interaction module by wire; DSP core board module also is connected with the RS232 communication interface; the uncontrollable rectification circuit module of three phase full bridge is connected with EMI filter circuit module, BUCK transducer and inverter circuit module successively by wire, and the uncontrollable rectification circuit module of described three phase full bridge also is connected by the three-phase alternating-current supply of wire with the outside.
Include IGBT copped wave module in the BUCK transducer.
Be provided with IGBT inverter circuit module in the inverter circuit module.
Be provided with the SPWM ripple generation module, Intelligent correction device, IGBT driver module and the power module that connect successively by wire in DSP core board module, be provided with intelligent Frequency And Amplitude Modulation control algolithm module in the Intelligent correction device, the IGBT driver module is by the IGBT copped wave module in wire and BUCK transducer, and the intelligent Frequency And Amplitude Modulation control algolithm module in the Intelligent correction device is connected with IGBT inverter circuit module in the inverter circuit module by wire.
LC resonant tank module includes high voltage reactor a, high voltage reactor b and the capicitive sample proving installation of connecting by wire.
The capicitive sample proving installation includes the capacitive divider high-voltage arm C that is connected in series by wire 1With capacitive divider low-voltage arm C 2, test article equivalent capacity voltage divider C 3With high-voltage arm capacitive divider C 1With low-voltage arm capacitive divider C 2In parallel by wire.
The beneficial effects of the utility model are,
(1) high-pressure frequency-conversion series resonance test power acquisition of the present utility model circuit accurately, buffer circuit and output filter to its high-power bridge inverter are optimized, suppress according to buffer circuit the objective function that the buffer circuit optimal design has been set up in investment three aspects that IGBT turn-offs superpotential ability, the loss of self and device, and from the actual requirement of high-voltage test electric power, set up the objective function that inverter output filter is optimized.
(2) high-pressure frequency-conversion series resonance test power supply of the present utility model makes frequency modulation control carry out elder generation's " coarse adjustment " " fine tuning " afterwards to it according to frequency error with intelligent frequency modulation algorithm, and its precision can reach 0.1Hz, and fast response time.
(3) high-pressure frequency-conversion series resonance test power acquisition use dsp processor of the present utility model and the more algorithm of optimization can be controlled the generation of PWM ripple and SPWM ripple more quickly, detect accurately the over-voltage and over-current signal, have higher stability.
Description of drawings
Fig. 1 is the structural drawing of high-pressure frequency-conversion series resonance test power supply of the present utility model;
Fig. 2 is the structural drawing of the variable-frequency power sources primary controller in high-pressure frequency-conversion series resonance test power supply of the present utility model;
Fig. 3 is the power regulation circuit module circuit diagram in high-pressure frequency-conversion series resonance test power supply of the present utility model.
in figure, 1. variable-frequency power sources primary controller, 2. exciting transformer, 3.DSP core board module, 4. the uncontrollable rectification circuit module of three phase full bridge, 5. holding circuit module, 6. human-computer interaction module, 7.EMI filter circuit module, 8.BUCK transducer, 9. inverter circuit module, 10. three-phase alternating-current supply, 11.IGBT copped wave module, 12. Intelligent correction device, 13.SPWM ripple generation module, 14. intelligent Frequency And Amplitude Modulation control algolithm module, 15.IGBT driver module, 16. power module, 17. high voltage reactor a, 18. high voltage reactor b, 19. capicitive sample proving installation, 20.IGBT inverter circuit module.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is elaborated.
High-pressure frequency-conversion series resonance test power supply of the present utility model, its structure as shown in Figure 1, include variable-frequency power sources primary controller 1, variable-frequency power sources primary controller 1 is connected with exciting transformer 2 by wire, exciting transformer 2 is connected with LC resonant tank module by wire, and LC resonant tank module is connected with variable-frequency power sources primary controller 1 by wire.
Variable-frequency power sources primary controller 1; its structure as shown in Figures 2 and 3; include the uncontrollable rectification circuit module 4 of DSP core board module 3 and three phase full bridge; DSP core board module 3 is connected with respectively holding circuit module 5, human-computer interaction module 6 by wire; DSP core board module 3 also is connected with the RS232 communication interface; the uncontrollable rectification circuit module 4 of three phase full bridge is connected with EMI filter circuit module 7, BUCK transducer 8 and inverter circuit module 9 successively by wire, and the uncontrollable rectification circuit module 4 of three phase full bridge also is connected by the three-phase alternating-current supply 10 of wire with the outside.
Include IGBT copped wave module 11 in BUCK transducer 8.
Be provided with IGBT inverter circuit module 20 in inverter circuit module 9.
Be provided with the SPWM ripple generation module 13, Intelligent correction device 12, IGBT driver module 15 and the power module 16 that connect successively by wire in DSP core board module 3, be provided with intelligent Frequency And Amplitude Modulation control algolithm module 14 in Intelligent correction device 12, IGBT driver module 15 is by the IGBT copped wave module 11 in wire and BUCK transducer 8, and the intelligent Frequency And Amplitude Modulation control algolithm module 14 in Intelligent correction device 12 is connected by the interior IGBT inverter circuit module 20 of wire and inverter circuit module 9.
LC resonant tank module, its structure include high voltage reactor a17, high voltage reactor b18 and the capicitive sample proving installation 19 of connecting by wire as shown in Figure 1.
Capicitive sample proving installation 19 includes the capacitive divider high-voltage arm C that is connected in series by wire 1With capacitive divider low-voltage arm C 2, test article equivalent capacity voltage divider C 3With high-voltage arm capacitive divider C 1With low-voltage arm capacitive divider C 2In parallel by wire.
The function of each module of high-pressure frequency-conversion series resonance test power supply of the present utility model:
High-pressure frequency-conversion series resonance test power supply has used the TMS320F28335 process chip to control CPU as core, utilize the characteristic of DSP high-speed computation speed, the peripheral circuit that integrated DSP is commonly used, satisfied the requirement of high-pressure frequency-conversion series resonance test device high stability, pinpoint accuracy, utilizing the symmetric regular-sampled method to produce the adjustable SPWM ripple of frequency controls the switching frequency of IGBT copped wave module 11, thereby obtain the optimum matching resonance frequency, thereby the tested device both end voltage is raised to desirable high voltage.
DSP core board module 1 can be used for providing control signal to the generation of PWM and SPWM ripple, produces the adjustable PWM ripple of dutycycle by dsp chip and controls the make-and-break time of major loop IGBT inverter circuit module, thereby reach the purpose of Power Regulation; Can also process the overcurrent-overvoltage signal, produce and interrupt, thus holding circuit; The work of 1 pair of whole high-pressure frequency-conversion series resonance test power supply various piece of DSP core board module is simultaneously controlled.
SPWM ripple generation module 13 is realized with the gauge tap of intelligent Frequency And Amplitude Modulation control algolithm module 14 by the Intelligent correction device 12 in inverter circuit module 9.Intelligent correction device 12 is by Real-Time Monitoring capacitive divider high-voltage arm C 1Voltage U c1, and calculate real-time frequency by phase-locked link, real-time frequency and frequency setting value f 0Compare and draw its difference
Figure BDA00002580493800061
: work as difference
Figure BDA00002580493800062
The time, entering frequency rough bar link, the adjusting step-length is 1Hz, when
Figure BDA00002580493800063
The time, enter next link; If capacitive divider high-voltage arm C 1Voltage U c1Reach maximal value, illustrate that circuit has entered resonance, if do not reach maximal value enter the fine setting link that step-length is 0.1Hz, wherein A is the threshold values of setting.
The type of drive of IGBT driver module 15 mainly contains: pulse transformer driving, optical couple isolation drive circuit, integrated driver module.High-pressure frequency-conversion series resonance test power supply of the present utility model uses integrated driver module to drive, and integration module adopts the IR2110 high voltage integrated circuit element of U.S. Int Rectifier Corp, and peripheral circuit is simple, and is functional.
Power module 16 is processed input voltage by different power supply chips, obtains different burning voltages, for the modules that installs provides stable electric energy.
As shown in Figure 3,380V three-phase alternating-current supply 10 becomes the direct current of 540V after the uncontrollable rectification circuit module 4 of three phase full bridge, in the transmission main line of direct supply, adopts BUCK transducer 8 namely to adopt the DC chopped-wave mode to carry out voltage-regulation.Concrete measure is: the uncontrollable rectification circuit module 4 of three phase full bridge gives BUCK transducer 8 interior IGBT copped wave module 11 DC voltage that obtains, the PWM ripple that the dutycycle that is generated by the Frequency And Amplitude Modulation control algolithm module 14 of DSP core board module 3 is adjustable is controlled the shutoff of IGBT in IGBT copped wave module 11 through IGBT driver module 15, utilize the size that changes PWM ripple dutycycle to regulate VD, so just can regulate the voltage magnitude that flows to inverter circuit module 9.
Inverter circuit module 9 is cores of whole high-pressure frequency-conversion series resonance test power supply, its stable case relation the safe operation of whole device and the precision of experimental data, consider from buying the factors such as convenience, technology maturation, design simplification, stable performance, inverter circuit module of the present utility model adopts high-power IGBT inverter circuit module as switching device.Inverter circuit module 9, the voltage U that obtains after rectification, bootstrap diode wherein and bootstrap capacitor, their selection has strict restriction.Alternately turn on and off M 1, M 2, M 3, M 4Just can obtain at the output terminal of inverter circuit module 9 voltage of alternation.Wherein the SPWM ripple that is produced by DSP that cut-offs of IGBT pipe is controlled, and voltage magnitude depends on the input terminal voltage value of inverter, and frequency depends on the switching frequency of device.Adjustable in the exportable amplitude 0 ~ 400V of inverter circuit module 9, frequency is the continuously adjustable ac voltage signal of 30Hz ~ 300Hz.
Inverter circuit module 9, the shutoff of controlling IGBT inverter circuit module by the PWM ripple produces the 540V voltage of adjustable frequency within the specific limits.Because higher grade of high-potting required voltage, for safety and easy to operate, adopt the strategy of pressure regulation after first frequency modulation, namely first process with the Intelligent correction device 12 in inverter circuit module 9, with closed-loop control and the frequency step size adjustment of implement device frequency f, intelligence is sought the frequency f that the loop enters resonant condition nMake it to reach resonant condition, and then regulate LC resonant tank module contents test product proving installation 19, make the effective value through BUCK transducer 8 output voltages reach desired voltage values, thereby obtain high voltage large capcity.
High-pressure frequency-conversion series resonance test power supply of the present utility model, mainly (the utility model is in the series resonance mode as research object by the exciting transformer of centre and LC resonant tank module, be comprised of high pressure resonance reactor, resonant capacitor and voltage divider, wherein resonant capacitor is comprised of high-tension measurement resonant capacitor and product to be tested capacitance) form.380V three-phase alternating-current supply 10 becomes direct current 510V by rectification circuit; by the overcurrent breakdown protection circuit, control by DSP the frequency of cut-offfing that frequency modulation and voltage modulation changes inverter circuit, seek suitable tuning-points; feed back to voltage signal from tested end simultaneously, be used for checking and controlling.
High-pressure frequency-conversion series resonance test power supply of the present utility model is that a kind of volume is little, can respond fast series resonance withstand voltage test automatic frequency adjustment power terminal device, and the high-tension unit before dispatching from the factory is made Real-Time Monitoring.Solved huge transportation, the defective that power supply capacity deficiency and electric pressure are not high of being difficult to of device volume in the past.This device is reduced expenses to construction and the development of UHV transmission, realizes that the electrical network upgrading has very large meaning.

Claims (7)

1. high-pressure frequency-conversion series resonance test power supply, it is characterized in that, include variable-frequency power sources primary controller (1), described variable-frequency power sources primary controller (1) is connected with exciting transformer (2) by wire, described exciting transformer (2) is connected with LC resonant tank module by wire, and described LC resonant tank module is connected with described variable-frequency power sources primary controller (1) by wire.
2. high-pressure frequency-conversion series resonance test power supply according to claim 1, it is characterized in that, described variable-frequency power sources primary controller (1) includes DSP core board module (3) and the uncontrollable rectification circuit module of three phase full bridge (4), described DSP core board module (3) is connected with respectively holding circuit module (5) by wire, human-computer interaction module (6), described DSP core board module (3) also is connected with the RS232 communication interface, the uncontrollable rectification circuit module of three phase full bridge (4) by wire successively with EMI filter circuit module (7), BUCK transducer (8) and inverter circuit module (9) connect, the uncontrollable rectification circuit module of described three phase full bridge (4) also is connected by the three-phase alternating-current supply (10) of wire with the outside.
3. high-pressure frequency-conversion series resonance test power supply according to claim 2, is characterized in that, includes IGBT copped wave module (11) in described BUCK transducer (8).
4. high-pressure frequency-conversion series resonance test power supply according to claim 2, is characterized in that, is provided with IGBT inverter circuit module (20) in described inverter circuit module (9).
5. according to claim 1-4 arbitrary described high-pressure frequency-conversion series resonance test power supplys, it is characterized in that, be provided with the SPWM ripple generation module (13) that connects successively by wire in described DSP core board module (3), Intelligent correction device (12), IGBT driver module (15) and power module (16), be provided with intelligent Frequency And Amplitude Modulation control algolithm module (14) in described Intelligent correction device (12), described IGBT driver module (15) is by the IGBT copped wave module (11) in wire and described BUCK transducer (8), intelligent Frequency And Amplitude Modulation control algolithm module (14) in described Intelligent correction device (12) is connected by the interior IGBT inverter circuit module (20) of wire and described inverter circuit module (9).
6. high-pressure frequency-conversion series resonance test power supply according to claim 1, is characterized in that, described LC resonant tank module includes the high voltage reactor a(17 that connects by wire), high voltage reactor b(18) and capicitive sample proving installation (19).
7. according to claim 1 or 6 described high-pressure frequency-conversion series resonance test power supplys, is characterized in that, described capicitive sample proving installation (19) includes the capacitive divider high-voltage arm C that is connected in series by wire 1With capacitive divider low-voltage arm C 2, test article equivalent capacity voltage divider C 3With described high-voltage arm capacitive divider C 1With low-voltage arm capacitive divider C 2In parallel by wire.
CN 201220689493 2012-12-13 2012-12-13 High-voltage variable-frequency series resonance test power supply Expired - Lifetime CN203025313U (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103675624A (en) * 2013-12-13 2014-03-26 中国西电电气股份有限公司 Power-frequency voltage testing device and testing method of lightning arrester
CN104035013A (en) * 2014-05-30 2014-09-10 中国南方电网有限责任公司超高压输电公司检修试验中心 500 KV electromagnetic voltage transformer alternating-current frequency-doubling withstand voltage test circuit and method
CN108957270A (en) * 2018-07-02 2018-12-07 江苏高电电力设备有限公司 The development system of portable resonance booster
CN110413014A (en) * 2019-08-29 2019-11-05 河南东旺熙朝实业有限公司 A kind of aluminium material extruder speed control circuit

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103675624A (en) * 2013-12-13 2014-03-26 中国西电电气股份有限公司 Power-frequency voltage testing device and testing method of lightning arrester
CN103675624B (en) * 2013-12-13 2016-07-06 中国西电电气股份有限公司 A kind of spark gap working-frequency voltage test device and test method
CN104035013A (en) * 2014-05-30 2014-09-10 中国南方电网有限责任公司超高压输电公司检修试验中心 500 KV electromagnetic voltage transformer alternating-current frequency-doubling withstand voltage test circuit and method
CN108957270A (en) * 2018-07-02 2018-12-07 江苏高电电力设备有限公司 The development system of portable resonance booster
CN110413014A (en) * 2019-08-29 2019-11-05 河南东旺熙朝实业有限公司 A kind of aluminium material extruder speed control circuit
CN110413014B (en) * 2019-08-29 2022-01-28 河南东旺熙朝实业有限公司 Speed control circuit of aluminum extruder

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