KR970072618A - Three-phase inverter voltage control device and control method - Google Patents

Three-phase inverter voltage control device and control method Download PDF

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Publication number
KR970072618A
KR970072618A KR1019960010185A KR19960010185A KR970072618A KR 970072618 A KR970072618 A KR 970072618A KR 1019960010185 A KR1019960010185 A KR 1019960010185A KR 19960010185 A KR19960010185 A KR 19960010185A KR 970072618 A KR970072618 A KR 970072618A
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KR
South Korea
Prior art keywords
voltage
vref
phase
cos
line
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KR1019960010185A
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Korean (ko)
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KR0167211B1 (en
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권기현
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이종수
Lg 산전주식회사
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Priority to KR1019960010185A priority Critical patent/KR0167211B1/en
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    • 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
    • H02M7/501—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 sinusoidal output voltages being obtained by the combination of several pulse-voltages having different amplitude and width
    • 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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
    • H02M1/4208—Arrangements for improving power factor of AC input
    • H02M1/4216—Arrangements for improving power factor of AC input operating from a three-phase input voltage

Abstract

본 발명은 3상 인버터의 전압제어에 관한 것으로, 특히 부하로 공급되는 두 개의 선간전압에 sinwt와 sin(wt-120°)를 곱하고 또한 Vref·cos2wt와 Vref·cos2(wt-120)를 곱한 후 기준전압과 비교하여 오차를 계산하고 이 오차를 비례적분제어함으로써, 종래 3상/2상변환과 고정축/회전축변환에 따른 시스템의 복잡함과 감결합계수(Decoupling Factor)를 산출하는 어려움을 해소함과 아울러 불평형부하를 전압제어할 수 있는 효과가 있다.In particular, the present invention relates to voltage control of a three-phase inverter, and more particularly, to a method of controlling voltage of a three-phase inverter in which sinwt and sin (wt-120 °) are multiplied by two line voltages supplied to a load and Vref cos 2 wt and Vref cos 2 And then calculating the error by comparing it with the reference voltage and performing proportional integral control of the error, it is difficult to calculate the complexity and decoupling factor of the system according to the conventional three-phase / two-phase conversion and fixed axis / And the voltage of the unbalanced load can be controlled.

Description

삼상 인버터 전압제어장치 및 제어방법Three-phase inverter voltage control device and control method

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is a trivial issue, I did not include the contents of the text.

제1도는 종래 삼상 인버터 전압제어장치의 구성도, 제2도는 본 발명 삼상 인버터 전압제어장치의 구성도.FIG. 1 is a configuration diagram of a conventional three-phase inverter voltage control device, and FIG. 2 is a configuration diagram of a three-phase inverter voltage control device of the present invention.

Claims (2)

인버터에서 부하로 공급되는 삼상 선간전압(Vrs,Vst, Vtr)에서 하나의 선간전압(Vrs)에 임의의 주파수를 갖는 삼각함수(sinwt)를 곱하여 새로운 선간전압(Vrs_a)을 만들고, 다른 선간전압(Vst)에 상기 삼각함수(sinwt)와 120°의 위상차를 갖는 삼각함수(sin(wt-120°)를 곱하여 새로운 선간전압(Vst_a)을 만드는 제1단계와, 상기 제1단계에서 도출한 선간전압(Vrs_a)에 기준전압(Vref)과 같은 크기를 갖고 임의의 주파수(w)로 표현되는 또 다른 삼각함수(Vref·cos2wt)를 곱한후 기준전압(Vref)과의 오차를 계산하고, 상기 제1단계의 선간전압(Vst_b)에 삼각함수(Vref·cos2(wt-120°))를 곱한 후 기준전압(Vref)과의 오차를 계산하는 제2단계와, 상기 제2단계에서 구한 각각의 전압값이 영이 되도록 비례적분제어하는 제3단계와, 제3단계에서 제어되어 출력되는 직류전압에 상기 삼각함수(sinwt)(sin(wt-120°))를 각각 다시 곱하고 이를 상전압으로 변환하는 제4단계와, 변환된 전압으로부터 인버터 게이트에 공급하는 제어신호를 생성하는 제5단계로 이루어짐을 특징으로 하는 삼상 인버터 제어방법.(Vrs_a) by multiplying one inter-line voltage (Vrs) with an arbitrary frequency by a trigonometric function (sinwt) in the three-phase line voltages (Vrs, Vst, Vtr) supplied from the inverter to the load, Vst) by multiplying the trigonometric function (sinwt) by a trigonometric function having a phase difference of 120 degrees (sin (wt - 120)) to generate a new line voltage (Vst_a) (Vref cos 2 wt) having the same magnitude as the reference voltage Vref and represented by an arbitrary frequency w and then calculating an error between the reference voltage Vref and the reference voltage Vref, A second step of multiplying the line-to-line voltage Vst_b in the first step by a trigonometric function Vref cos 2 (wt-120 °) and then calculating an error with the reference voltage Vref; A third step of performing a proportional-integral control so that the voltage value of the triangular function (sinwt) becomes zero, and a fifth step of generating a control signal to be supplied to the inverter gate from the converted voltage. The method according to claim 1, Way. 인버터에서 리엑터와 필터 커패시터에 의해 부하로 공급되는 3상 선간전압(Vrs, Vst)과 연산하기 위하여 임의의 주파수(w)를 갖는 삼각함수 sinwt와, sin(wt-120°)를 발생하는 제1위상발생기와, 상기 3상 선간저압(Vrs)과 상기 sinwt, 선간전압(Vst)과 상기 sin(wt-120°)를 각각 곱하는 제1 및 제2승산기와, 기준전압을 최대크기로 하는 Vref·cos2wt와 Vref·cos2(wt-120°) 를 발생하는 제2위상발생기와, 상기 제1승산기의 출력전압에 상기 Vref·cos2wt 를 더하는 제1가산기와, 상기 제2승산기의 출력전압에 상기 Vref·cos2(wt-120°)를 더하는 제2가산기와, 상기 제1 및 제2가산기의 각각의 출력전압과 기준전압(Vref)을 가감 연산하여 오차를 발생시키는 제1 및 제2비교기와, 상기 오차의 크기가 영이 되도록 비례적분제어하는 제1 및 제2비례적분제어기와, 비례적분된 직류전압에 상기 sinwt와 sin(wt-120°)를 곱하여 교류전압을 만드는 제3 및 제4승산기와, 이를 다시 상전압으로 변환하는 선간/상전압 변환기와, 변환된 상전압으로 상기 인버터의 스위칭 트랜지스터의 게이트에 인가하는 펄스를 발생하는 게이트펄스발생기로 구성하여 된 것을 특징으로 하는 삼상 인버터 전압제어장치.A trigonometric function sinwt having an arbitrary frequency (w) to calculate the three-phase line voltage (Vrs, Vst) supplied to the load by the reactor and the filter capacitor in the inverter, and a first A phase generator, first and second multipliers for multiplying the three-phase line low voltage Vrs, the sinwt, the line voltage Vst and the sin (wt-120 °), and Vref cos 2 wt and Vref · cos 2 (wt-120 °), a first adder for adding Vref · cos 2 wt to the output voltage of the first multiplier, a second adder for adding the output of the second multiplier A second adder for adding the voltage Vref cos 2 (wt - 120 deg.) To the voltage, a first adder for adding an output voltage of each of the first and second adders and a reference voltage (Vref) 2 comparator, first and second proportional-integral controllers for performing proportional-integral control so that the magnitude of the error becomes zero, and s a third and a fourth multiplier for multiplying inwt by sin (wt-120) to produce an alternating voltage, a line-to-phase voltage converter for converting it into a phase voltage again, And a gate pulse generator for generating a pulse to be applied to the three-phase inverter. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: It is disclosed by the contents of the first application.
KR1019960010185A 1996-04-04 1996-04-04 A voltage control equipment and method for 3-phase inverter KR0167211B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019960010185A KR0167211B1 (en) 1996-04-04 1996-04-04 A voltage control equipment and method for 3-phase inverter

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Application Number Priority Date Filing Date Title
KR1019960010185A KR0167211B1 (en) 1996-04-04 1996-04-04 A voltage control equipment and method for 3-phase inverter

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KR970072618A true KR970072618A (en) 1997-11-07
KR0167211B1 KR0167211B1 (en) 1999-04-15

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KR101026281B1 (en) * 2008-10-20 2011-03-31 엘에스산전 주식회사 Current controller of active power filter

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