CN101478249A - A DC electric power used for large current transducer check - Google Patents
A DC electric power used for large current transducer check Download PDFInfo
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- CN101478249A CN101478249A CNA2008101970762A CN200810197076A CN101478249A CN 101478249 A CN101478249 A CN 101478249A CN A2008101970762 A CNA2008101970762 A CN A2008101970762A CN 200810197076 A CN200810197076 A CN 200810197076A CN 101478249 A CN101478249 A CN 101478249A
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Abstract
The invention relates to a direct current supply used for checking a large current transformer. The direct current supply is characterized in that four parts, namely, a full-controlled rectifier module, an inverse module, a high-frequency transformer and an uncontrolled rectifier module are included; the four parts are electrically connected sequentially; the inverse module is connected in parallel with a primary side of the high-frequency transformer; and a secondary side of the high-frequency transformer is connected in parallel with an AC side of the uncontrolled rectifier module. The direct current supply ensures that the ripple coefficient of the output current is less than 0.5 percent, the output current is continuously adjustable in a wide range, the volume and the weight are reduced, the cost is lowered greatly, and the requirements for checking the large current transformer in an electric power system can be satisfied at the same time.
Description
Technical field
The present invention relates to a kind of DC electric power used for large current transducer check.
Background technology
Along with increasing of domestic high voltage direct current transmission project, new requirement has been proposed DC electric power used for large current transducer check.Not only require this type of power supply output current can several peaces to a Wan An on a large scale in adjustable continuously, but also to guarantee high accuracy, the high stability of output current, in order to satisfy the demand of on-the-spot test, to guarantee that also this type of power volume is little, in light weight, reliability is high simultaneously.Yet also do not satisfy the DC power supply of above-mentioned whole requirements at present.
Summary of the invention
The purpose of this invention is to provide the higher DC electric power used for large current transducer check of a kind of precision.
Technical scheme of the present invention is: a kind of DC electric power used for large current transducer check, it is characterized in that: comprise four parts, full-controlled rectifier module, inversion module, high frequency transformer and do not control rectification module and be electrically connected successively, inversion module is connected in parallel on the former limit of high frequency transformer, and the secondary of high frequency transformer is connected in parallel on the AC side of not controlling rectification module.
Aforesaid DC electric power used for large current transducer check is characterized in that: described full-controlled rectifier module comprises a three-phase PWM rectification circuit and a filter of being made up of electric capacity; This three-phase PWM rectification circuit comprises six power switch pipes; Filter is connected in parallel on the DC side of PWM rectification circuit.Wherein, the alternating current that the three-phase PWM rectification circuit is used for obtaining from system converts direct current to, and the system side current distortion is reduced and power factor (PF) is close to 1; Filter is connected in parallel on the DC side of PWM rectification circuit, is used for leaching the high-frequency harmonic composition of output voltage.
Aforesaid DC electric power used for large current transducer check, it is characterized in that: described inversion module adopts the phase shifting full bridge soft switch inverter circuit, comprise four power switch pipes, be connected in parallel on four electric capacity and a resonant inductance on four power switch pipes, this module is used for obtaining direct current from the full-controlled rectifier module, and exports from exchanging outlet side after converting thereof into high frequency square wave.
Aforesaid DC electric power used for large current transducer check, it is characterized in that: the described rectification module of not controlling adopts current-doubling rectifier, comprise two high-power fast recovery diodes, two filter inductances and a filter capacitor, current-doubling rectifier converts the high frequency square wave of high frequency transformer secondary output to direct current.
Aforesaid DC electric power used for large current transducer check is characterized in that: the power switch pipe that uses in described full-controlled rectifier module and the inversion module any as in insulated gate bipolar thyristor, gate turn off thyristor, the integral gate change transistor.
The invention has the beneficial effects as follows: realized high accuracy, high stability simultaneously; Adjustable continuously, conversion efficiency is high; Volume is little, in light weight; The AC power current distortion reduces, and power factor is near 1; Cost reduces.
High accuracy, high stability: the current-doubling rectifier of employing makes output DC flow liner ripple littler, can reach 0.5%;
Adjustable continuously, conversion efficiency is high: inversion module has adopted the phase-shifting full-bridge inverter circuit, by changing duty ratio, realization is adjustable continuously to output current, and this circuit has been realized the zero-voltage and zero-current switch of power device simultaneously, has reduced switching loss and electromagnetic interference;
Volume is little, in light weight: owing to adopted high frequency transformer, DC source volume and weight is traditional DC source 30% of equal performance;
The AC power current distortion reduces, and power factor is near 1: owing to adopted the high-frequency PWM rectification circuit, make this power supply little and can realize that the power factor (PF) of grid side is close to 1 to the harmonic pollution of electrical network;
Cost reduces: filter inductance, filter capacitor smaller volume greatly reduce overall cost.
Description of drawings
Fig. 1 is the circuit theory diagrams of the DC electric power used for large current transducer check of the embodiment of the invention.
Embodiment
The DC electric power used for large current transducer check of the embodiment of the invention, its main circuit diagram as shown in Figure 1, this DC electric power used for large current transducer check comprises four parts, is followed successively by full-controlled rectifier module, inversion module, high frequency transformer and does not control rectification module.
(1) full-controlled rectifier module, this module comprise one by six power switch pipes (T1-T6) be connected in parallel on three-phase commutation bridge, filter of being made up of capacitor C 0 that six diodes (D1-D6) on the power switch pipe are formed.Wherein six power switch pipes constitute the three-phase PWM rectification circuit, control its switch by sinusoid pulse width modulation SPWM method, realize the high-frequency PWM rectification, will convert direct current to, pass through the high-frequency harmonic composition in the capacitor C 0 filtering output voltage then from the alternating current that system obtains.
(2) inversion module, this module comprise one by four power switch pipes (T7-T10), be connected in parallel on four diodes (D7-D10) on four power switch pipes, be connected in parallel on four electric capacity (C1-C4) and the phase shifting full bridge soft switch inverter circuit that resonant inductance L0 forms on four power switch pipes.Power switch pipe T7, T8 drive signal are complementary but a Dead Time is arranged, and power switch pipe T9, the complementation of T10 drive signal also have same Dead Time.Drive signal t lag time of the drive signal specific power switch transistor T 7 (or T8) of power switch pipe T10 (or T9).In the process of turn-offing, opening at switching device, four electric capacity (C1-C4) and resonant inductance L0 resonance realize not having switching loss in the switching process.This module is reverse into high frequency square wave with the direct voltage of rectification module output, pass through capacitance C5 then after, be input to the former side of high frequency transformer.
(3) high frequency transformer, this high frequency transformer T is a step-down transformer, and its former side connects the inversion module outlet side, and its secondary connects the input side of not controlling current-doubling rectifier in the rectification module.
(4) do not control rectification module, this module comprises a current-doubling rectifier and a filter capacitor C6, and wherein current-doubling rectifier comprises two high-power fast recovery diodes (D11, D12) and two filter inductance L1, L2.L1=L2 wherein.Filter inductance L1, L2 in the current-doubling rectifier can with the shared magnetic core of high frequency transformer T, so just can further reduce power volume.Insert load behind the direct current process filtering capacitor C 6 filtering high-frequency harmonic compositions of current-doubling rectifier output.
The power switch pipe that uses in full-controlled rectifier module and the inversion module any as in insulated gate bipolar thyristor, gate turn off thyristor, the integral gate change transistor.
Claims (6)
1. DC electric power used for large current transducer check, it is characterized in that: comprise four parts, full-controlled rectifier module, inversion module, high frequency transformer and do not control rectification module and be electrically connected successively, inversion module is connected in parallel on the former limit of high frequency transformer, and the secondary of high frequency transformer is connected in parallel on the AC side of not controlling rectification module.
2, DC electric power used for large current transducer check as claimed in claim 1 is characterized in that: described full-controlled rectifier module comprises a three-phase PWM rectification circuit and a filter of being made up of electric capacity; This three-phase PWM rectification circuit comprises six power switch pipes; Filter is connected in parallel on the DC side of PWM rectification circuit.Wherein, the alternating current that the three-phase PWM rectification circuit is used for obtaining from system converts direct current to, and the system side current distortion is reduced and power factor (PF) is close to 1; Filter is connected in parallel on the DC side of PWM rectification circuit, is used for leaching the high-frequency harmonic composition of output voltage;
3, DC electric power used for large current transducer check as claimed in claim 1 or 2, it is characterized in that: described inversion module adopts the phase shifting full bridge soft switch inverter circuit, comprise four power switch pipes, be connected in parallel on four electric capacity and a resonant inductance on four power switch pipes, this module is used for obtaining direct current from the full-controlled rectifier module, and exports from exchanging outlet side after converting thereof into high frequency square wave;
4, DC electric power used for large current transducer check as claimed in claim 1 or 2, it is characterized in that: the described rectification module of not controlling adopts current-doubling rectifier, comprise two high-power fast recovery diodes, two filter inductances and a filter capacitor, current-doubling rectifier converts the high frequency square wave of high frequency transformer secondary output to direct current.
5, DC electric power used for large current transducer check as claimed in claim 3, it is characterized in that: the described rectification module of not controlling adopts current-doubling rectifier, comprise two high-power fast recovery diodes, two filter inductances and a filter capacitor, current-doubling rectifier converts the high frequency square wave of high frequency transformer secondary output to direct current.
6, DC electric power used for large current transducer check as claimed in claim 1 is characterized in that: the power switch pipe that uses in described full-controlled rectifier module and the inversion module any as in insulated gate bipolar thyristor, gate turn off thyristor, the integral gate change transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101970762A CN101478249A (en) | 2008-09-26 | 2008-09-26 | A DC electric power used for large current transducer check |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101970762A CN101478249A (en) | 2008-09-26 | 2008-09-26 | A DC electric power used for large current transducer check |
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| Publication Number | Publication Date |
|---|---|
| CN101478249A true CN101478249A (en) | 2009-07-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2008101970762A Pending CN101478249A (en) | 2008-09-26 | 2008-09-26 | A DC electric power used for large current transducer check |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102081115A (en) * | 2010-12-08 | 2011-06-01 | 湖南大学 | Method and device for indirectly measuring large DC based on AC detection |
| WO2011097852A1 (en) * | 2010-02-10 | 2011-08-18 | 深圳市科陆电子科技股份有限公司 | Energy supply system and method of electronic high voltage power mutual-inductor |
| CN102412740A (en) * | 2010-09-20 | 2012-04-11 | 深圳市盛弘电气有限公司 | Multiphase AC-DC (alternating current-direct current) isolating conversion circuit and multiphase AC-DC power supply |
| CN102594194A (en) * | 2012-03-05 | 2012-07-18 | 徐州中矿大传动与自动化有限公司 | Current resonant type induction inverter |
| CN102664527A (en) * | 2012-05-14 | 2012-09-12 | 株洲泰格豪斯工具系统有限公司 | High-current switch power supply and high-current switch power supply system |
| CN107144807A (en) * | 2017-07-20 | 2017-09-08 | 云南电网有限责任公司电力科学研究院 | GIS current transformer verifying power supplies based on phase-shifting carrier wave multiple technology |
-
2008
- 2008-09-26 CN CNA2008101970762A patent/CN101478249A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011097852A1 (en) * | 2010-02-10 | 2011-08-18 | 深圳市科陆电子科技股份有限公司 | Energy supply system and method of electronic high voltage power mutual-inductor |
| CN102412740A (en) * | 2010-09-20 | 2012-04-11 | 深圳市盛弘电气有限公司 | Multiphase AC-DC (alternating current-direct current) isolating conversion circuit and multiphase AC-DC power supply |
| CN102412740B (en) * | 2010-09-20 | 2014-01-29 | 深圳市盛弘电气有限公司 | Multiphase AC-DC (alternating current-direct current) isolating conversion circuit and multiphase AC-DC power supply |
| CN102081115A (en) * | 2010-12-08 | 2011-06-01 | 湖南大学 | Method and device for indirectly measuring large DC based on AC detection |
| CN102081115B (en) * | 2010-12-08 | 2012-09-05 | 湖南大学 | Method and device for indirectly measuring large DC based on AC detection |
| CN102594194A (en) * | 2012-03-05 | 2012-07-18 | 徐州中矿大传动与自动化有限公司 | Current resonant type induction inverter |
| CN102664527A (en) * | 2012-05-14 | 2012-09-12 | 株洲泰格豪斯工具系统有限公司 | High-current switch power supply and high-current switch power supply system |
| CN107144807A (en) * | 2017-07-20 | 2017-09-08 | 云南电网有限责任公司电力科学研究院 | GIS current transformer verifying power supplies based on phase-shifting carrier wave multiple technology |
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Open date: 20090708 |