CN109450272A - High-power AuCT and its control method - Google Patents

High-power AuCT and its control method Download PDF

Info

Publication number
CN109450272A
CN109450272A CN201811306965.8A CN201811306965A CN109450272A CN 109450272 A CN109450272 A CN 109450272A CN 201811306965 A CN201811306965 A CN 201811306965A CN 109450272 A CN109450272 A CN 109450272A
Authority
CN
China
Prior art keywords
value
voltage
auct
bus
power
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201811306965.8A
Other languages
Chinese (zh)
Other versions
CN109450272B (en
Inventor
李东
高永军
张宇龙
葸代其
王雷
王喜乐
李岩
牛剑博
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CRRC Yongji Electric Co Ltd
Original Assignee
CRRC Yongji Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by CRRC Yongji Electric Co Ltd filed Critical CRRC Yongji Electric Co Ltd
Priority to CN201811306965.8A priority Critical patent/CN109450272B/en
Publication of CN109450272A publication Critical patent/CN109450272A/en
Application granted granted Critical
Publication of CN109450272B publication Critical patent/CN109450272B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
    • H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
    • H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
    • H02M5/443—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a thyratron or thyristor type requiring extinguishing means
    • H02M5/45—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
    • H02M5/451—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only with automatic control of output voltage or frequency
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/505—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means
    • H02M7/515—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only

Abstract

The present invention relates to current transformer, specially a kind of high-power AuCT and its control method.Solve the problems, such as high-power AuCT output voltage fluctuation.The present invention passes through the fluctuation for extracting intermediate dc bus voltage, for correcting the electric current loop setting value of three-phase inversion double-closed-loop control devicei d *、i q *, the oscillation of intermediate bus bar and inverter output voltage so can be effectively reduced, is had broad application prospects in engineering.Present invention is particularly suitable for alternating current drive electric locomotives.

Description

High-power AuCT and its control method
Technical field
The present invention relates to current transformer, specially a kind of high-power AuCT and its control method.The high-power auxiliary Current transformer and its control method are particularly suitable for alternating current drive electric locomotive.
Background technique
In recent years, with the continuous development of railway technology, electric locomotive has become main force's vehicle of railway transportation, and electric power The modularization of locomotive auxiliary converter, high power have become development trend, this just proposes the control of AuCT higher Requirement.Especially after AuCT output power increase, the stability of entire supplementary controlled system can be reduced, or even lead The diverging of cause system.
The main circuit topology of high-power AuCT includes four module, thyristor rectifier module, DC bus filtering Module, inverter module, output filter module.It is whole to input AC 1000V by the thyristor half-controlled bridge of thyristor rectifier module After stream, after the intermediate bus bar LC filtering of DC bus filter module, intermediate dc 750V electricity is obtained, inversion mould is then passed through The three-phase subordinate inverter of block obtains 380V alternating current after the outputting inductance capacitor filtering of output filter module again.
The control strategy of inverter uses the Double closed-loop of voltage and current under rotating coordinate system.Under rest frame Of ac transforms under rotating coordinate system as DC quantity, can use PI controller and obtains floating output.It is sat first in rotation Controlled device is modeled under mark system, controller then is arranged to model under rotating coordinate system, the output of controller becomes again It changes under rest frame and can be obtained by modulating wave, and then control switch pipe generates three-phase alternating current.
The controller of existing inverter is as shown in Figure 1, using Double closed-loop of voltage and current；Outer ring includes that two PI are adjusted Device (proportional and integral controller), PI1 and PI2, inverter output voltage setting value ud *With inverter output voltage collection value udMake For the input of PI1, inverter output voltage setting value uq *With inverter output voltage collection value uqInput as PI2；Inner ring It also include two pi regulators, PI3 and PI4, inverter output current setting value id *With inverter output current collection value idMake For the input of PI3, inverter output current setting value iq *With inverter output current collection value iqInput as PI4, wherein id *By ud、ud *While control, also by coupling ω CfuqDisturbance, wherein ω be output angular frequency, CfFor output filtering The capacitance of device.iq *By electric uq、uq *While control, also by coupling ω CfudDisturbance；Current inner loop control amount Vd、 VqOutput as controller is for generating the pwm pulse signal of control inverter, wherein VdBy electric id *、id、udControl While, also by ω LmiqThe influence of disturbance, LmFor the inductance value of low-pass filter, VqBy electric iq *、iq、uqWhat is controlled is same When, also by ω LmidThe influence of disturbance.
Since thyristor control frequency is lower, after auxiliary output powers increase in addition, intermediate bus bar LC filtered electrical electrification The resonance of appearance causes intermediate-bus voltage oscillation to increase, and fluctuates so as to cause AuCT AC380 output voltage larger.Work It is solved in journey frequently by the mode that the intermediate dc bus side in AuCT serially adds resistance or increases Support Capacitor big Power AuCT controls unstable problem, but will increase energy loss by sealing in resistance, reduces system effectiveness, adds Big Support Capacitor will increase the volume and cost of AuCT.
Summary of the invention
The present invention solves the problems, such as high-power AuCT output voltage fluctuation, provides a kind of high-power AuCT And its control method.The high-power AuCT and its control method are used by the fluctuation of extraction intermediate dc bus voltage To correct the electric current loop i of circuit control deviced *、iq *Given value so can effectively reduce the vibration of current transformer output voltage It swings.
The present invention is achieved by the following technical scheme: a kind of control method of high-power AuCT, the big function The inverter of rate AuCT uses Double closed-loop of voltage and current, the fluctuation of intermediate dc bus voltage is extracted, for repairing The electric current loop setting value i of positive inverter controld *、iq *, the oscillation of current transformer output voltage is reduced with this；Intermediate dc bus electricity The undulating value Δ U=U of pressuredc- Utd, UdcFor the real-time sampling value of intermediate dc bus voltage, UtdFor intermediate dc bus voltage Real-time sampling value obtained after trapper only filters out intermediate dc bus filter inductance capacitor LC resonance frequency Stable intermediate dc bus voltage value；For correcting current ring setting value id *、iq *Correction value Δ id、ΔiqAre as follows:
Δid=Δ iq=(k1|ΔU/ε|α+k2|ΔU/ε|β)ΔU
Wherein β > 1,0 < α < 1, k1> 0, k2> 0, ε are the constant greater than 0, a, β, k1、k2, ε adjusts according to the actual situation. ε is the acceptable range of intermediate dc bus voltage fluctuation, selects ε=50V here, is according to the experiment to different loads power It obtains, β takes, the present invention practical debugging result according to experimental field relatively reasonable less than 5 number, selection β=2.73, a= 0.84.K in formula1、k2It respectively to the correction coefficient of two compensation in formula, is generally selected not to the fine tuning of two compensation corrections Preferably excessive, selection is excessive, loses | Δ U/ ε |αWith | Δ U/ ε |βThe effect of respective script, the present invention choose k1=k2=1.By Above formula, which can be seen that, works as | Δ U | when > ε, i.e., and when medium voltage fluctuation range is greater than 50V, k2|ΔU/ε|βIt plays a leading role, i.e. β It plays a leading role, id *、iq *Compensation dynamics is larger, is less than 50V to adjust medium voltage fluctuation as early as possible.When | Δ U | when < ε, i.e., Medium voltage fluctuation is less than 50V, k1|ΔU/ε|αIt plays a leading role, i.e., a plays a leading role, id *、iq *Compensation dynamics is smaller, intermediate Busbar voltage carries out more slowly adjustment.It so can be in real time to the i of auxiliary inversiond *、iq *Compensation is adjusted, and is led to The feedback to Δ U as auxiliary inversion control system is crossed, can be good at the oscillation for reducing AuCT control system.Effectively Solve the problems, such as it is existing by change main circuit parameter bring volume increase and efficiency reduce.
A kind of high-power AuCT, it is inverse comprising thyristor rectifier module, DC bus filter module, inverter module The controller for becoming the inverter in module uses Double closed-loop of voltage and current；Outer ring includes two pi regulators, PI1 and PI2, Inverter output voltage setting value ud *With inverter output voltage collection value udAs the input of PI1, inverter output voltage is set Definite value uq *With inverter output voltage collection value uqInput as PI2；Inner ring also includes two pi regulators, PI3 and PI4, Inverter output current setting value id *With inverter output current collection value idAs the input of PI3, inverter output current is set Definite value iq *With inverter output current collection value iqInput as PI4；There are also Δ i for the input of PI3d, there are also Δs for the input of PI4 iq,
Δid=Δ iq=(k1|ΔU/ε|α+k2|ΔU/ε|β)ΔU
Wherein β > 1,0 < α < 1, k1> 0, k2> 0, ε are the constant greater than 0, a, β, k1、k2, ε adjusts according to the actual situation； Δ U is the undulating value of intermediate dc bus voltage, Δ U=Udc- Utd, UdcFor the real-time sampling value of intermediate dc bus voltage, UtdPass through trapper only to intermediate dc bus filter inductance capacitor LC resonance for the real-time sampling value of intermediate dc bus voltage Frequency carries out intermediate dc bus voltage value stable obtained from filtering out afterwards.
The present invention passes through the fluctuation for extracting intermediate dc bus voltage, for correcting the electricity of three-phase inversion double-closed-loop control device Flow ring setting value id *、iq *, the oscillation of intermediate bus bar and inverter output voltage so can be effectively reduced, is had in engineering Have broad application prospects.Present invention is particularly suitable for alternating current drive electric locomotives.
Detailed description of the invention
Fig. 1 is the inversion control block diagram of AuCT of the present invention.
Specific embodiment
Embodiment 1
The inverter of a kind of control method of high-power AuCT, the high-power AuCT uses voltage and current Double-closed-loop control extracts the fluctuation of intermediate dc bus voltage, for correcting the electric current loop setting value i of inverter controld *、iq *, The oscillation of current transformer output voltage is reduced with this；The undulating value Δ U=U of intermediate dc bus voltagedc- Utd, UdcIt is intermediate straight Flow the real-time sampling value of busbar voltage, UtdPass through trapper only to intermediate dc for the real-time sampling value of intermediate dc bus voltage Bus filter inductance capacitor LC resonance frequency carries out intermediate dc bus voltage value stable obtained from filtering out afterwards；For correcting Electric current loop setting value id *、iq *Correction value Δ id、ΔiqAre as follows:
Δid=Δ iq=(k1|ΔU/ε|α+k2|ΔU/ε|β)ΔU
Wherein β > 1,0 < α < 1, k1> 0, k2> 0, ε are the constant greater than 0, a, β, k1、k2, ε adjusts according to the actual situation. ε is the acceptable range of intermediate dc bus voltage fluctuation, selects ε=50V here, is according to the experiment to different loads power It obtains, β takes, the present invention practical debugging result according to experimental field relatively reasonable less than 5 number, selection β=2.73, a= 0.84.K in formula1、k2It respectively to the correction coefficient of two compensation in formula, is generally selected not to the fine tuning of two compensation corrections Preferably excessive, selection is excessive, loses | Δ U/ ε |αWith | Δ U/ ε |βThe effect of respective script, the present invention choose k1=k2=1.By Above formula, which can be seen that, works as | Δ U | when > ε, i.e., and when medium voltage fluctuation range is greater than 50V, k2|ΔU/ε|βIt plays a leading role, i.e. β It plays a leading role, id *、iq *Compensation dynamics is larger, is less than 50V to adjust medium voltage fluctuation as early as possible.When | Δ U | when < ε, i.e., Medium voltage fluctuation is less than 50V, k1|ΔU/ε|αIt plays a leading role, i.e., a plays a leading role, id *、iq *Compensation dynamics is smaller, intermediate Busbar voltage carries out more slowly adjustment.It so can be in real time to the i of auxiliary inversiond *、iq *Compensation is adjusted, and is led to The feedback to Δ U as auxiliary inversion control system is crossed, can be good at the oscillation for reducing AuCT control system.Effectively Solve the problems, such as it is existing by change main circuit parameter bring volume increase and efficiency reduce.
Embodiment 2
A kind of high-power AuCT, it is inverse comprising thyristor rectifier module, DC bus filter module, inverter module The controller for becoming the inverter in module uses Double closed-loop of voltage and current；Outer ring includes two pi regulators, PI1 and PI2, Inverter output voltage setting value ud *With inverter output voltage collection value udAs the input of PI1, inverter output voltage is set Definite value uq *With inverter output voltage collection value uqInput as PI2；Inner ring also includes two pi regulators, PI3 and PI4, Inverter output current setting value id *With inverter output current collection value idAs the input of PI3, inverter output current is set Definite value iq *With inverter output current collection value iqInput as PI4；There are also Δ i for the input of PI3d, there are also Δs for the input of PI4 iq,
Δid=Δ iq=(k1|ΔU/ε|α+k2|ΔU/ε|β)ΔU
Wherein β > 1,0 < α < 1, k1> 0, k2> 0, ε are the constant greater than 0, a, β, k1、k2, ε adjusts according to the actual situation； Δ U is the undulating value of intermediate dc bus voltage, Δ U=Udc- Utd, UdcFor the real-time sampling value of intermediate dc bus voltage, UtdPass through trapper only to intermediate dc bus filter inductance capacitor LC resonance for the real-time sampling value of intermediate dc bus voltage Frequency carries out intermediate dc bus voltage value stable obtained from filtering out afterwards.

Claims (6)

1. the inverter of a kind of control method of high-power AuCT, the high-power AuCT is double using voltage and current Closed-loop control, which is characterized in that the fluctuation of intermediate dc bus voltage is extracted, for correcting the electric current loop setting of inverter control Value id *、iq *, the oscillation of current transformer output voltage is reduced with this；The undulating value Δ U=U of intermediate dc bus voltagedc- Utd, Udc For the real-time sampling value of intermediate dc bus voltage, UtdIt is only right by trapper for the real-time sampling value of intermediate dc bus voltage Intermediate dc bus filter inductance capacitor LC resonance frequency carries out intermediate dc bus voltage value stable obtained from filtering out afterwards； For correcting current ring setting value id *、iq *Correction value Δ id、ΔiqAre as follows:
Δid=Δ iq=(k1|ΔU/ε|α+k2|ΔU/ε|β)ΔU
Wherein β > 1,0 < α < 1, k1> 0, k2> 0, ε are the constant greater than 0, a, β, k1、k2, ε adjusts according to the actual situation.
2. a kind of high-power AuCT includes thyristor rectifier module, DC bus filter module, inverter module, inversion The controller of inverter in module uses Double closed-loop of voltage and current；Outer ring includes two pi regulators, PI1 and PI2, inverse Become device output voltage setting value ud *With inverter output voltage collection value udAs the input of PI1, inverter output voltage setting Value uq *With inverter output voltage collection value uqInput as PI2；Inner ring also includes two pi regulators, PI3 and PI4, inverse Become device and exports current setting value id *With inverter output current collection value idAs the input of PI3, inverter output current setting Value iq *With inverter output current collection value iqInput as PI4；It is characterized in that, there are also Δ i for the input of PI3d, PI4's There are also Δ i for inputq,
Δid=Δ iq=(k1|ΔU/ε|α+k2|ΔU/ε|β)ΔU
Wherein β > 1,0 < α < 1, k1> 0, k2> 0, ε are the constant greater than 0, a, β, k1、k2, ε adjusts according to the actual situation；Δ U is The undulating value of intermediate dc bus voltage, Δ U=Udc- Utd, UdcFor the real-time sampling value of intermediate dc bus voltage, UtdFor in Between DC bus-bar voltage real-time sampling value by trapper only to intermediate dc bus filter inductance capacitor LC resonance frequency into Row intermediate dc bus voltage value stable obtained from filtering out afterwards.
3. the control method of high-power AuCT according to claim 1, which is characterized in that ε is that intermediate dc is female Line voltage fluctuates acceptable range, and ε=50V, β is selected to take the number less than 5.
4. high-power AuCT according to claim 2, which is characterized in that ε is intermediate dc bus voltage fluctuation Acceptable range selects ε=50V, β to take the number less than 5.
5. the control method of high-power AuCT according to claim 3, which is characterized in that β=2.73, a= 0.84, k1=k2=1.
6. high-power AuCT according to claim 4, which is characterized in that β=2.73, a=0.84, k1=k2= 1。
CN201811306965.8A 2018-11-03 2018-11-03 High-power auxiliary converter and control method thereof Active CN109450272B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811306965.8A CN109450272B (en) 2018-11-03 2018-11-03 High-power auxiliary converter and control method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811306965.8A CN109450272B (en) 2018-11-03 2018-11-03 High-power auxiliary converter and control method thereof

Publications (2)

Publication Number Publication Date
CN109450272A true CN109450272A (en) 2019-03-08
CN109450272B CN109450272B (en) 2020-10-13

Family

ID=65550820

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811306965.8A Active CN109450272B (en) 2018-11-03 2018-11-03 High-power auxiliary converter and control method thereof

Country Status (1)

Country Link
CN (1) CN109450272B (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102377362A (en) * 2011-09-30 2012-03-14 中国电力科学研究院 Control method for voltage-source-type unit power factor high-temperature superconducting energy storage converter
CN102570876A (en) * 2010-12-28 2012-07-11 欧利生电气株式会社 Controlled single-phase AC/DC converter
CN104092239A (en) * 2014-06-25 2014-10-08 国家电网公司 Photovoltaic grid-connected control method based on modular multilevel converter
CN105006828A (en) * 2015-07-28 2015-10-28 南京工程学院 Grid-connected converter negative sequence current compensation method
CN105743367A (en) * 2016-04-15 2016-07-06 中国矿业大学 Dead beat control method of pulse width modulation (PWM) rectifier under unbalanced power grid voltage
CN107612449A (en) * 2017-09-06 2018-01-19 西南交通大学 Metro traction current transformer DC side oscillation suppression method based on front feedback voltage compensation

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102570876A (en) * 2010-12-28 2012-07-11 欧利生电气株式会社 Controlled single-phase AC/DC converter
CN102377362A (en) * 2011-09-30 2012-03-14 中国电力科学研究院 Control method for voltage-source-type unit power factor high-temperature superconducting energy storage converter
CN104092239A (en) * 2014-06-25 2014-10-08 国家电网公司 Photovoltaic grid-connected control method based on modular multilevel converter
CN105006828A (en) * 2015-07-28 2015-10-28 南京工程学院 Grid-connected converter negative sequence current compensation method
CN105743367A (en) * 2016-04-15 2016-07-06 中国矿业大学 Dead beat control method of pulse width modulation (PWM) rectifier under unbalanced power grid voltage
CN107612449A (en) * 2017-09-06 2018-01-19 西南交通大学 Metro traction current transformer DC side oscillation suppression method based on front feedback voltage compensation

Also Published As

Publication number Publication date
CN109450272B (en) 2020-10-13

Similar Documents

Publication Publication Date Title
CN202931221U (en) Inverter parallel control system
CN106532701B (en) LCL type Active Power Filter-APF and its control method
CN102222937B (en) Photovoltaic grid-connected inverter and grid-connected control method thereof
CN103684021A (en) Inverter parallel-control system
CN105144534B (en) Inverter synchronizes
CN107086806A (en) A kind of AuCT and its control method
CN104079002A (en) Double-closed-loop control method of photovoltaic energy storage system in grid-connection mode
CN101010865A (en) Polyphase current supplying circuit and driver apparatus
CN206962732U (en) A kind of AuCT
CN107732930A (en) A kind of multi-functional converter system suitable for metro traction power system
CN106981865A (en) A kind of two-way AC/DC converters control method for parallel connection system of direct-current grid
CN111740454B (en) Mixed micro-grid alternating-current and direct-current voltage unified control method based on bus interface converter
CN103812135A (en) Control method for improving adaptability of LCL type grid-connected inverter for weak grid
CN106786643A (en) Fault current active control type current limiting system and its control method
CN107565568A (en) Hybrid power electronic transformer and control method based on single star-like MMC structures
CN110311411A (en) Gird-connected inverter band resistance feed-forward compensation system and method under weak grid
CN104753359B (en) A kind of power frequency electric power electronic transformer and its implementation
CN104993712B (en) A kind of three-phase single phase alternating current converter control method
CN112332445A (en) LCL grid-connected inverter indirect current control method based on instruction current compensation
CN107517011A (en) A kind of &#34; one drag two &#34; series resonance intermediate frequency induction heating power supply of multifrequency output
CN107196263A (en) SVG control method of the intensive deicing device reactive-load compensation with ice-melt when parallel
CN206442162U (en) Charger control system
Suru et al. Indirect Current Control of a Filtering and Regeneration System used in DC Substations for Urban Traction
CN109450272A (en) High-power AuCT and its control method
CN104852388B (en) A kind of chain type SVG device with active power filtering function

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant