KR950026092A - Output voltage control device of three-phase inverter - Google Patents

Output voltage control device of three-phase inverter Download PDF

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Publication number
KR950026092A
KR950026092A KR1019940002663A KR19940002663A KR950026092A KR 950026092 A KR950026092 A KR 950026092A KR 1019940002663 A KR1019940002663 A KR 1019940002663A KR 19940002663 A KR19940002663 A KR 19940002663A KR 950026092 A KR950026092 A KR 950026092A
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South Korea
Prior art keywords
phase
converter
output
value
proportional
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KR1019940002663A
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Korean (ko)
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KR0186048B1 (en
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권기현
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백중영
금성계전 주식회사
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    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05FSYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F3/00Non-retroactive systems for regulating electric variables by using an uncontrolled element, or an uncontrolled combination of elements, such element or such combination having self-regulating properties
    • G05F3/02Regulating voltage or current
    • G05F3/04Regulating voltage or current wherein the variable is ac
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M7/00Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48Conversion 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

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Power Engineering (AREA)
  • Inverter Devices (AREA)
  • Control Of Ac Motors In General (AREA)

Abstract

본 발명은 3상인터의 출력전압 제어장치에 관한 것으로, 종래에는 부하가 선형적일 경우에 두개의 변환기(3상/2상변환기와 고정축/회전축변환기)에 의해 변환된 값이 직류 즉, 일정한 값으로 변환되지만 비선형적일 경우엔 변환된 값은 직류에 교류가 더해진 맥동하는 값으로 되어 마이크로프로세서에서 디지탈적으로 비례-적분 제어를 행하게 되므로 이 맥동성분에 따르는 오차를 전적으로 보상하지 못해 결국 정상상태 에러가 되어 시스템이 요구하는 전압을 제대로 발생시키지 못하게 되는 문제점이 있었다. 따라서 본 발명은 두개의 변환기(3상/2상변환기와 고정축/회전축변환기)를 통해 직류값으로 변환시키는 점에 주안하여 비선형적인 부하에서 발생하는 맥동성 분만을 따로이 검출하고 이 검출된 값을 제어기상에서 다시 더해 비선형부하로 인한 에러를 보상할 수 있도록 한다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for controlling an output voltage of a three-phase inverter. In the related art, when a load is linear, a value converted by two transducers (three-phase / two-phase converter and fixed-axis / rotary axis converter) is DC, that is, constant If converted to a value but nonlinear, the converted value becomes a pulsating value with alternating current in direct current, and digitally performs proportional-integral control in the microprocessor. There was a problem that does not properly generate the voltage required by the system. Therefore, the present invention focuses on the conversion of a direct current value through two transducers (three-phase / two-phase converter and a fixed shaft / rotary axis converter), and separately detects pulsating labor generated in a nonlinear load and detects the detected value. Add back on the controller to compensate for errors due to nonlinear loads.

Description

3상인버터의 출력전압 제어장치Output voltage control device of three-phase inverter

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 종래 3상인버터의 출력전압 제어장치 구성도.1 is a configuration diagram of an output voltage control device of a conventional three-phase inverter.

제2도는 본 발명 3상인버터의 출력전압 제어장치 구성도.Figure 2 is a block diagram of the output voltage control device of the three-phase inverter of the present invention.

Claims (1)

필터캐패시터에서 검출된 3상전압을 2상전압으로 변환하는 3상/2상변환기(1)와, 상기 필터캐패시터에서 검출된 3상부하전류 및 인버터부(16)로 흐르는 3상전류를 2상전류로 변환시키는 3상/2상변환기(5)(17)와, 상기 3상/2상변환기(1,5,17)에서 변환된 2상전압 및 전류를 회전축상의 값으로 변환시키는 제1 내지 제3 고정축/회전축변환기(2,6,18)와, 상기 제1고정축/회전축변환기(2)에서 변환된 출력전압과 기준전압(VDref, Vqref)을 비교하여 그에따른 오차를 발생시키는 제1,2비교부(3)(4)와, 상기 제3고정축/회전축변환기(18)에서 변환된 두개의 직류값에 대하여 각각 필터링하는 제1,2로우패스필터(19)(20)와, 상기 제3고정축/회전축변환기(18)로 부터 출력된 전류의 직류값과 제1,2로우패스필터(19)(20)를 통해 필터링된 전류의 직류값에 대하여 비교하여 그에따른 오차를 출력하는 제5,6비교부(21)(22)와, 상기 제5,6비교부(21)(22)의 출력전압에 대해 일정한 이득을 곱하는 제1,2곱셈기(23)(24)와, 상기 제1,2비교부(3)(4)를 통해 출력된 오차에 대해 비례-적분제어를 행하여 기준전류값(idLf, iqLf)을 출력하는 제1,2전압용 비례-적분제어기(7)(8)와, 상기 제1,2전압용 비례-적분제어기(7)(8)와, 제1,2곱셈기(23)(24)의 출력값을 각각 입력받아 가산하는 제1,2가산기(25)(26)와, 상기 제1,2가산기(25)(26)로 부터 출력되는 값과 제2고정축/회전축변환기(6)로 부터 각각 출력되는 전류값(idf)(iqf)을 비교하고 그에따른 오차를 비례-적분제어를 행하는 제3,4전류용 비례-전분제어기(11)(12)로 출력하는 제3,4비료부(9)(10)와, 상기 제3,4전류용 비례-적분제어기(11)(22)를 통해 비례-제어를 행한 결과값에 대해 고정 좌표축상의 값으로 변환시켜 2상/3상변환기(14)로 출력하는 회전축/고정축변환기(13)와, 상기 2상/3상변환기(14)로 부터 출력되는 3상변환값을 기준으로 게이트신호를 인버터부(16)에 보내어 전원공급을 제어하는 게이트구동부(15)로 구성됨을 특징으로 하는 3상인버터의 출력전압 제어장치.The three-phase / two-phase converter 1 for converting the three-phase voltage detected by the filter capacitor into a two-phase voltage, and the three-phase load current detected by the filter capacitor and the three-phase current flowing through the inverter unit 16 as two-phase currents. Three-phase / two-phase converters (5) (17) for converting, and first to third for converting the two-phase voltages and currents converted in the three-phase / two-phase converters (1,5,17) to values on a rotating shaft. A fixed-axis / rotary shaft converter (2, 6, 18) and the output voltage and the reference voltage (VD ref , Vq ref ) converted in the first fixed-axis / rotary shaft converter (2) is compared to generate a corresponding error First and second low pass filters 19 and 20 for filtering the first and second comparison units 3 and 4 and the two DC values converted by the third fixed axis / rotation axis converter 18, respectively. And compares the DC value of the current output from the third fixed shaft / rotation shaft converter 18 with the DC value of the current filtered through the first and second low pass filters 19 and 20 and compares the error thereof. The first and second multipliers 23 and 24 multiplying the output voltages of the fifth and sixth comparators 21 and 22 and the output voltages of the fifth and sixth comparators 21 and 22 by a constant gain. And a proportional-integral controller for the first and second voltages which outputs a reference current value (id Lf , iq Lf ) by performing proportional-integral control on the error output through the first and second comparators 3 and 4. (7) (8), first and second input and output values of the proportional-integral controller (7) (8) and the first and second multipliers (23) and (24) for the first and second voltages, respectively; The values output from the adders 25 and 26, the first and second adders 25 and 26, and the current values i df respectively output from the second fixed and rotary shaft converters 6, i. qf ) and the third and fourth fertilizers (9) and (10) for comparing the resulting error to the proportional-starch controllers (11, 12) for third and fourth currents to perform proportional-integral control, and The proportional-control result of the 3,4 current proportional-integral controllers 11 and 22 is converted into a value on the fixed coordinate axis to the 2-phase / 3-phase converter 14. A gate driver for controlling a power supply by sending a gate signal to the inverter unit 16 based on a rotating shaft / fixed axis converter 13 to output and a three-phase conversion value output from the two-phase / three-phase converter 14. Output voltage control device for a three-phase inverter, characterized in that consisting of (15). ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019940002663A 1994-02-15 1994-02-15 Control equipment for output voltage of 3-phase inverter KR0186048B1 (en)

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KR0186048B1 KR0186048B1 (en) 1999-05-15

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KR101026281B1 (en) * 2008-10-20 2011-03-31 엘에스산전 주식회사 Current controller of active power filter
KR101527446B1 (en) * 2013-11-27 2015-06-10 서울과학기술대학교 산학협력단 An apparatus and a method for model predictive control of an uninterruptible power supply

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