JPH0880052A - Active filter for power - Google Patents
Active filter for powerInfo
- Publication number
- JPH0880052A JPH0880052A JP6210313A JP21031394A JPH0880052A JP H0880052 A JPH0880052 A JP H0880052A JP 6210313 A JP6210313 A JP 6210313A JP 21031394 A JP21031394 A JP 21031394A JP H0880052 A JPH0880052 A JP H0880052A
- Authority
- JP
- Japan
- Prior art keywords
- harmonic
- current
- detected
- coordinate conversion
- conversion circuit
- 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.)
- Pending
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、半導体電力変換装置を
利用して電力系統に含まれる高調波電流の補償を行う電
力用アクティブフィルタに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power active filter for compensating a harmonic current contained in a power system by using a semiconductor power converter.
【０００２】[0002]
【従来の技術】従来電力用アクティブフィルタのシステ
ム構成を図２に示す。図２において、Ｅｓは三相交流電
源（系統電源）、Ｌは三相負荷、１は系統に接続された
アクティブフィルタ（主回路）で、直流コンデンサＣを
充電するダイオードＤを用いたダイオードブリッジと、
この直流コンデンサを直流電源とする半導体スイッチ素
子Ｓを用いた三相インバータからなる半導体電力変換装
置を利用している。2. Description of the Related Art A system configuration of a conventional power active filter is shown in FIG. In FIG. 2, Es is a three-phase AC power supply (system power supply), L is a three-phase load, 1 is an active filter (main circuit) connected to the system, and is a diode bridge using a diode D that charges a DC capacitor C. ,
A semiconductor power conversion device including a three-phase inverter using a semiconductor switch element S that uses this DC capacitor as a DC power source is used.
【０００３】２はアクティブフィルタの高調波電流検出
部で、電流検出器ＣＴ１で検出した三相負荷電流ｉLU，
ｉLV，ｉLWを電源角周波数ωで回転する回転座標系ｄｑ
座標に変換する３相／ｄｑ座標変換回路２２と、座標変
換された電流ｉdの交流分〜ｉdを抽出するハイパスフィ
ルタ２３1と、座標変換された電流ｉqの交流分〜ｉqを
抽出するハイパスフィルタ２３2と、この交流分〜ｉd及
び〜ｉqを３相に変換し、高調波電流を出力するｄｑ／
３相座標変換回路２４とにより構成されている。Reference numeral 2 is a harmonic current detecting section of the active filter, which is a three-phase load current i LU detected by the current detector CT1.
Rotating coordinate system dq that rotates i LV and i LW at the power supply angular frequency ω
And 3-phase / dq coordinate conversion circuit 22 for converting the coordinates, and the high-pass filter 23 1 to extract the AC component through i d of the current i d, which is the coordinate transformation, the AC component through i q coordinate transformed current i q a high-pass filter 23 2 for extracting, converting the AC component through i d and through i q in three phases, and outputs a harmonic current dq /
And a three-phase coordinate conversion circuit 24.
【０００４】３はアクティブフィルタの制御部で、検出
部１０で検出された高調波電流と、電流検出器ＣＴ２で
検出したアクティブフィルタ１からの補償高調波電流と
の偏差を検出する偏差検出器３１と、この偏差電流が入
力する電流制御回路３２と、この出力をＰＷＭ変調して
アクティブフィルタ１を上記偏差がなくなるように補償
制御するＰＷＭ制御回路３３とにより構成されている。Reference numeral 3 denotes an active filter control unit, which is a deviation detector 31 for detecting a deviation between the harmonic current detected by the detection unit 10 and the compensated harmonic current from the active filter 1 detected by the current detector CT2. And a current control circuit 32 to which this deviation current is input, and a PWM control circuit 33 that PWM-modulates this output and performs compensation control of the active filter 1 so that the deviation is eliminated.
【０００５】上記３相／ｄｑ座標変換回路２１の演算式
を（１）式に示す。An arithmetic expression of the three-phase / dq coordinate conversion circuit 21 is shown in the expression (1).
【０００６】[0006]
【数１】 [Equation 1]
【０００７】しかして、電流ｉdは負荷電流の無効電力
成分に、電流ｉqは負荷電流の有効電力成分となる。ま
た、電流ｉq，ｉqの直流成分は基本波成分に、交流分は
高調波電流成分となる。Therefore, the current i d becomes the reactive power component of the load current and the current i q becomes the active power component of the load current. Further, the direct current component of the currents i q and i q becomes the fundamental wave component, and the alternating current component becomes the harmonic current component.
【０００８】よって電流ｉd，ｉqからハイパスフィルタ
２３1，２３2により交流分だけを検出し、ｄｑ／３相座
標変換回路２４により３相／ｄｑ座標変換回路２２の逆
変換を行うことにより負荷電流の高調波成分が検出でき
る。従って制御部３によりアクティブフィルタ１を補償
制御し、系統に負荷電流の高調波成分を打ち消すように
高調波を注入することにより負荷電流の高調波成分を補
償することができる。Therefore, by detecting only the AC component from the currents i d and i q by the high-pass filters 23 1 and 23 2 , and performing the inverse conversion of the three-phase / dq coordinate conversion circuit 22 by the dq / 3-phase coordinate conversion circuit 24. The harmonic component of the load current can be detected. Therefore, the active filter 1 is compensated and controlled by the control unit 3, and the harmonic components of the load current can be compensated by injecting the harmonic components into the system so as to cancel the harmonic components of the load current.
【０００９】[0009]
【発明が解決しようとする課題】上記従来のアクティブ
フィルタは高調波電流検出部において３相／ｄｑ座標変
換回路で変換されたｄ軸，ｑ軸電流の中から高調波成分
を求めるためにハイパスフィルタを用いている。しか
し、このフィルタの周波数特性と時間応答がトレードオ
フの関係にあるので、低次高調波まで検出しようとする
と応答時間が遅れてしまう。The above-mentioned conventional active filter is a high-pass filter for obtaining a harmonic component from the d-axis and q-axis currents converted by the three-phase / dq coordinate conversion circuit in the harmonic current detector. Is used. However, since there is a trade-off relationship between the frequency characteristic of this filter and the time response, the response time is delayed when trying to detect low-order harmonics.
【００１０】本発明は、従来のこのような問題点に鑑み
てなされたものであり、その目的とするところは、次数
ｋの設定によって任意の高調波を高速に検出して補償す
ることができる電力用アクティブフィルタを提供するこ
とにある。The present invention has been made in view of the above-mentioned conventional problems, and an object thereof is to detect and compensate an arbitrary harmonic at a high speed by setting the order k. It is to provide an active filter for electric power.
【００１１】[0011]
【課題を解決するための手段】上記目的を達成するため
に、本発明におけるアクティブフィルタは、高調波電流
を検出して高調波電流を打ち消すように半導体電力変換
装置を制御するアクティブフィルタにおいて、高調波電
流検出部が、補償しようとするｋ次高調波電流の次数と
電源角周波数を掛けた値で回転する回転座標系により、
三相負荷電流を変換してｋ次高調波電流を直流分として
出力する回転座標変換回路と、前記変換された直流分を
前記回転座標変換の逆変換をしてｋ次高調波電流信号を
出力する逆回転座標変換回路とを備えていることを特徴
とする。In order to achieve the above object, an active filter according to the present invention is an active filter which detects a harmonic current and controls a semiconductor power converter so as to cancel the harmonic current. The wave current detection unit uses a rotating coordinate system that rotates at a value obtained by multiplying the order of the kth harmonic current to be compensated by the power supply angular frequency,
A rotating coordinate conversion circuit for converting a three-phase load current and outputting a kth harmonic current as a direct current component, and an inverse conversion of the converted direct current component to the rotating coordinate conversion to output a kth harmonic current signal. And a reverse rotation coordinate conversion circuit for
【００１２】[0012]
【作用】回転座標変換回路は補償しようとするｋ次高調
波の次数と電源角周波数を掛けた値で回転する回転座標
系で三相負荷電流のｋ次高調波電流成分を直流分に変換
し、この直流分を逆回転座標変換回路により三相に変換
してｋ次高調波を検出しているので、ｋ次高調波が低次
高調波でも高速に検出できる。半導体電力変換装置はこ
の検出したｋ次高調波を電流指令として制御され負荷電
流のｋ次高調波を打ち消す。The rotating coordinate conversion circuit converts the kth harmonic current component of the three-phase load current into a direct current component in the rotating coordinate system that rotates at a value obtained by multiplying the order of the kth harmonic to be compensated by the power source angular frequency. Since the DC component is converted into three phases by the reverse rotation coordinate conversion circuit to detect the kth harmonic, the kth harmonic can be detected at high speed even if it is a low harmonic. The semiconductor power converter is controlled by using the detected kth harmonic as a current command to cancel the kth harmonic of the load current.
【００１３】[0013]
【実施例】本発明は、低次高調波の検出を高調波の次数
と電源角周波数を掛けた値で回転する回転座標系に変換
することによって検出し、これを電流指令として負荷電
流の高調波を補償制御するものである。まずその原理に
ついて述べる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention detects low-order harmonics by converting them into a rotating coordinate system that rotates at a value obtained by multiplying the order of the harmonics by the power supply angular frequency, and using this as a current command, the harmonics of the load current are detected. It compensates and controls the wave. First, the principle will be described.
【００１４】負荷電流ｉLU，ｉLU，ｉLWを（２）式のよ
うに定義する。The load currents i LU , i LU , and i LW are defined as in equation (2).
【００１５】[0015]
【数２】 [Equation 2]
【００１６】（２）式中のｎは整数であり、高調波の次
数を意味する。In the equation (2), n is an integer and means the order of harmonics.
【００１７】いま負荷電流からｋ次高調波を検出，補償
する場合を考える。（２）式の負荷電流を高調波次数と
回転角速度を掛け合わせた値ｋωｔで回転かる座標系へ
ｄｑ変換する。この場合の変換式は（３）式のように定
義できる。Now, consider the case of detecting and compensating the kth harmonic from the load current. The load current in equation (2) is dq-converted into a rotating coordinate system with a value kωt obtained by multiplying the harmonic order by the rotational angular velocity. The conversion equation in this case can be defined as in equation (3).
【００１８】[0018]
【数３】 (Equation 3)
【００１９】（３）式に（２）式を代入すると、（４）
式，（５）式が得られる。Substituting the expression (2) into the expression (3), the expression (4) is obtained.
Expression (5) is obtained.
【００２０】[0020]
【数４】 [Equation 4]
【００２１】[0021]
【数５】 (Equation 5)
【００２２】ここで、高調波電流をｋωで回転する座標
系へ変換した場合、高調波電流成分、ｎ＝ｋ＋ｉ（ｉ＝
０，±１，±２，±３…）の成分は（４）式，（５）式
より（６）式，（７）式のようになる。Here, when the harmonic current is converted into a coordinate system rotating at kω, the harmonic current component, n = k + i (i =
The components of 0, ± 1, ± 2, ± 3 ...) From the expressions (4) and (5), the expressions (6) and (7) are obtained.
【００２３】[0023]
【数６】 (Equation 6)
【００２４】[0024]
【数７】 (Equation 7)
【００２５】（６）式，（７）式より、負荷電流中に含
まれている第ｋ次高調波電流が直流値に、基本調波及び
その他の次数の高調波電流は交流値になることがわか
る。よって、ｄ軸電流ｉd及びｑ軸電流ｉqの中からロー
パスフィルタにより直流分だけを取り出せば、系統電流
中に含まれるｋ次高調波を検出することができる。From equations (6) and (7), the k-th harmonic current contained in the load current should be a DC value, and the fundamental harmonic and other harmonic currents should be AC values. I understand. Therefore, if only the direct current component is extracted from the d-axis current i d and the q-axis current i q by the low-pass filter, the kth harmonic contained in the system current can be detected.
【００２６】しかして、この検出値をアクテイブフィル
タにより補償すれば、電力系統中の第ｋ次高調波を除去
することができる。従って、例えば、ｋの値を５または
７に設定すれば、第５次、第７次といった低次高調波を
補償することができる。However, if the detected value is compensated by the active filter, the kth harmonic in the power system can be removed. Therefore, for example, if the value of k is set to 5 or 7, low-order harmonics such as the 5th and 7th orders can be compensated.
【００２７】実施例 本発明の実施例にかかるアクテイブフィルタのシステム
構成を図１に示す。同図において、Ｅｓは三相交流電源
（系統電源）、Ｌは三相負荷、１は系統に接続されたア
クテイブフィルタ（主回路）、２は高調波電流検出部
で、高調波電流検出回路２Ａとｋ次（低次）高調波電流
検出回路２Ｂ及び検出回路２Ａと２Ｂの出力を加算する
加算器２８とからなる。Embodiment FIG. 1 shows the system configuration of an active filter according to an embodiment of the present invention. In the figure, Es is a three-phase AC power supply (system power supply), L is a three-phase load, 1 is an active filter (main circuit) connected to the system, 2 is a harmonic current detection unit, and a harmonic current detection circuit 2A. And a k-th (low-order) harmonic current detection circuit 2B and an adder 28 for adding the outputs of the detection circuits 2A and 2B.
【００２８】高調波電流検出回路２Ａは、負荷電流検出
器ＣＴ１で検出した負荷電流とｋ次高調波電流検出回路
２Ｂで検出したｋ次高調波電流との差を検出する減算器
２１と、このｋ次高調波電流が引かれた負荷電流を
（１）式の演算により電源角周波数ωで回転する回転座
標系のｄ軸電流ｉd及びｑ軸電流ｉqに座標変換する３相
／ｄｑ座標変換回路２２と、電流ｉd，ｉqから交流分〜
ｉd，〜ｉqを抽出するハイパスフィルタ２３1，２３
2と、この交流分〜ｉd，ｉqを座標変換して高調波電流
を出力するｄｑ／３相座標変換回路から構成されてい
る。The harmonic current detection circuit 2A includes a subtracter 21 for detecting the difference between the load current detected by the load current detector CT1 and the kth harmonic current detected by the kth harmonic current detection circuit 2B. Three-phase / dq coordinates in which the load current from which the kth harmonic current is subtracted is converted into the d-axis current i d and the q-axis current i q of the rotating coordinate system that rotates at the power supply angular frequency ω by the calculation of the equation (1). From the conversion circuit 22 and the currents i d and i q
High pass filters 23 1 and 23 for extracting i d , to i q
2 and a dq / 3-phase coordinate conversion circuit that performs coordinate conversion of the alternating current components i d and i q and outputs a harmonic current.
【００２９】また、ｋ次高調波電流検出回路２ＢはＣＴ
１で検出した負荷電流を（３）式の演算により高調波の
次数ｋ（例えば、５又は７）と電源角周波数ωを掛けた
値ｋωで回転する回転座標系のｄ軸電流ｉd及びｑ軸電
流ｉqに座標変換する３相／ｋω回転座標変換回路２５
と、この電流ｉd，ｉqから直流分（ｋ次高調波成分）だ
けを取り出すローパスフィルタ２６1，２６2と、この電
流ｉd，ｉqの直流分を３相／ｋω回転座標変換回路２５
の逆変換を行いｋ次高調波電流を出力するｋω／３相回
転座標変換回路２７から構成されている。The kth harmonic current detection circuit 2B is a CT
The load current detected in 1 is rotated by a value kω obtained by multiplying the harmonic order k (for example, 5 or 7) by the power supply angular frequency ω by the calculation of the formula (3), and the d-axis currents i d and q of the rotating coordinate system. Three-phase / kω rotation coordinate conversion circuit 25 for coordinate conversion into shaft current i q
And low-pass filters 26 1 and 26 2 for extracting only the DC component (kth harmonic component) from the currents i d and i q, and the DC component of the currents i d and i q in a three-phase / kω rotation coordinate conversion circuit. 25
It is composed of a kω / 3-phase rotary coordinate conversion circuit 27 which performs the inverse conversion of the above and outputs a kth harmonic current.
【００３０】３はアクテイブフィルタの制御部で、高調
波電流検出部２の加算器２８から出力される検出高調波
電流と、電流検出器ＣＴ２で検出したアクテイブフィル
タ１からの補償高調波電流との偏差を検出する偏差検出
器３１と、この偏差電流が入力する電流制御回路３２
と、この出力をＰＷ変調してアクテイブフィルタ１を制
御するＰＷＭ制御回路３３とにより構成されている。Reference numeral 3 denotes an active filter control section, which detects the detected harmonic current output from the adder 28 of the harmonic current detection section 2 and the compensation harmonic current from the active filter 1 detected by the current detector CT2. Deviation detector 31 for detecting deviation and current control circuit 32 for inputting the deviation current
And a PWM control circuit 33 that PW modulates this output to control the active filter 1.
【００３１】次にこの実施例の動作について説明する。
電流検出器ＣＴ１で検出した負荷電流ｉLu，ｉLV，ｉLW
は３相／ｋω回転座標変換回路２５により検出しようと
する高調波の次数ｋと電源角周波数ωを掛けた値ｋωで
回転する回転座標系によりｄ，ｑ軸電流ｉd，ｉqに変換
される。この場合（３）式の演算により行われるのでｋ
次高調波成分は直流分、その他の成分は交流分に変換さ
れる。この直流分はローパスフィルタ２６1、及び２６2
で抽出されるので遅れなくｋ次高調波成分の検出ができ
る。この電流ｉd，ｉqの直流分はｋω／３相回転座標変
換回路２７により３相／ｋω回転座標変換回路２５の逆
変換されるので、その出力はｋ次高調波電流となる。Next, the operation of this embodiment will be described.
Load current i Lu , i LV , i LW detected by the current detector CT1
Is converted into d, q axis currents i d , i q by a rotating coordinate system that rotates at a value kω obtained by multiplying the harmonic order k to be detected by the three-phase / kω rotating coordinate conversion circuit 25 by the power source angular frequency ω. It In this case, since the calculation is performed by the equation (3), k
The next harmonic component is converted into a direct current component, and the other components are converted into an alternating current component. This DC component is included in the low-pass filters 26 1 and 26 2.
Since it is extracted by, the kth harmonic component can be detected without delay. The direct current components of the currents i d and i q are inversely converted by the kω / 3-phase rotary coordinate conversion circuit 27 by the 3-phase / kω rotary coordinate conversion circuit 25, so that the output becomes a kth harmonic current.
【００３２】一方、減算器２１により電流検出器ＣＴ１
で検出した負荷電流からｋ次高調波検出回路２Ｂで検出
したｋ次高調波電流を差引いた負荷電流は３相／ｄｑ座
標変換回路２２によりｄ，ｑ軸電流ｉd，ｉqに変換され
る。座標変換回路２２は（１）式の演算を行うので、座
標変換された電流ｉd，ｉqの交流分が高調波成分とな
る。この交流分には低次のｋ次高調波成分が含まれてい
ない。この電流ｉd，ｉqの交流分〜ｉd，〜ｉqはバイパ
スフィルタ２３1，２３2により抽出される。ｋω／３相
回転座標変換回路２４はフィルタ２３1，２３2からの交
流分を座標変換回路２２の逆変換を行い低次のｋ次高調
波を除く高調波電流を出力する。On the other hand, the subtractor 21 causes the current detector CT1
Is converted d, q-axis current i d, the i q by the load current 3-phase / dq coordinate conversion circuit 22 obtained by subtracting the detected k-th harmonic current in the detected load current k-th harmonic detection circuit 2B . Since the coordinate conversion circuit 22 performs the calculation of the equation (1), the AC component of the coordinate-converted currents i d and i q becomes a harmonic component. This AC component does not include the low-order kth harmonic component. This current i d, i q AC component through i d of, through i q is extracted by a bypass filter 23 1, 23 2. The kω / 3-phase rotational coordinate conversion circuit 24 performs the inverse conversion of the AC components from the filters 23 1 and 23 2 by the coordinate conversion circuit 22 and outputs a harmonic current excluding the low-order kth harmonic.
【００３３】加算器２８は座標変換回路２４からのｋ次
高調波を含まない高調波電流と、回転座標変換回路２７
からのｋ次高調波電流を加算してｋ次高調波を含む高調
波電流を出力する。減算器３１によりこの高調波電流と
電流検出器ＣＴ２で検出した高調波電流との偏差が検出
され、電流制御回路３２はこの偏差がなくなるようにＰ
ＷＭ制御回路３３を介してアクテイブフィルタ１を補償
制御する。The adder 28 uses the harmonic current from the coordinate conversion circuit 24 that does not include the k-th harmonic, and the rotating coordinate conversion circuit 27.
The kth harmonic currents from are added to output a harmonic current including the kth harmonic. The difference between this harmonic current and the harmonic current detected by the current detector CT2 is detected by the subtractor 31, and the current control circuit 32 sets P so that this deviation disappears.
The active filter 1 is compensation-controlled via the WM control circuit 33.
【００３４】以上のように、回転座標変換回路２５によ
り低次のｋ次高調波電流を直流分に変換し、ローパスフ
ィルタ２６1，２６2により直流分を抽出し逆回転座標変
換回路２７でｋ次高調波電流に変換しているので、低次
のｋ次高調波を高速に検出して補償することができる。As described above, the rotational coordinate conversion circuit 25 converts the low-order kth harmonic current into a DC component, the low-pass filters 26 1 and 26 2 extract the DC component, and the inverse rotational coordinate conversion circuit 27 extracts k components. Since the current is converted into the second harmonic current, the low-order kth harmonic can be detected and compensated at high speed.
【００３５】なお、ｋの値を異にするｋ次高調波電流検
出回路２Ｂを複数設ければ、次数を異にする複数の高調
波を高速に検出して補償することができる。If a plurality of k-order harmonic current detection circuits 2B having different k values are provided, a plurality of harmonics having different orders can be detected and compensated at high speed.
【００３６】[0036]
【発明の効果】本発明は、上述のとおり構成されている
ので、次に記載する効果を奏する。Since the present invention is configured as described above, it has the following effects.
【００３７】（１）低次高調波の検出をその高調波の次
数ｋと電源角周波数ωを掛けた値で回転する回転座標系
に変換することによって検出しているので、低次高調波
高速に検出して補償することができる。(1) Since low-order harmonics are detected by converting them into a rotating coordinate system that rotates by a value obtained by multiplying the harmonic order k by the power source angular frequency ω, low-order harmonics are detected at high speed. Can be detected and compensated.
【００３８】（２）次数ｋの値の設定によって任意の高
調波を高速に検出して補償することができる。(2) Arbitrary harmonics can be detected and compensated at high speed by setting the value of the order k.
【図１】本発明の実施例を示すシステム構成図。FIG. 1 is a system configuration diagram showing an embodiment of the present invention.
【図２】従来例を示すシステム構成図。FIG. 2 is a system configuration diagram showing a conventional example.
１…アクテイブフィルタ（主回路） ２…高調波電流検出部 ２Ａ…高調波電流検出回路 ２Ｂ…ｋ次（低次）高調波電流検出回路 ３…制御部 ２２…３相／ｄｑ座標変換回路 ２３1，２３2…ハイパスフィルタ ２４…ｄｑ／３相座標変換回路 ２５…３相／ｋω回転座標変換回路 ２６1，２６2…ローパスフィルタ ２７…ｋω／３相回転座標変換回路1 ... Active filter (main circuit) 2 ... Harmonic current detection unit 2A ... Harmonic current detection circuit 2B ... Kth (low order) harmonic current detection circuit 3 ... Control unit 22 ... 3-phase / dq coordinate conversion circuit 23 1 , 23 2 ... High-pass filter 24 ... dq / 3-phase coordinate conversion circuit 25 ... 3-phase / kω rotation coordinate conversion circuit 26 1 , 26 2 ... Low-pass filter 27 ... kω / 3-phase rotation coordinate conversion circuit
Claims (1)
消すように半導体電力変換装置を制御するアクティブフ
ィルタにおいて、 高調波電流検出部が、 補償しようとするｋ次高調波電流の次数と電源角周波数
を掛けた値で回転する回転座標系により、三相負荷電流
を変換してｋ次高調波電流を直流分として出力する回転
座標変換回路と、 この変換された直流分を前記回転座標変換の逆変換をし
てｋ次高調波電流信号を出力する逆回転座標変換回路
と、 を備え、ｋ次高周波電流を高速に検出して補償すること
を特徴としたアクティブフィルタ。1. In an active filter for detecting a harmonic current and controlling a semiconductor power conversion device so as to cancel the harmonic current, the harmonic current detection unit includes a k-th harmonic current order and a power source to be compensated. A rotary coordinate conversion circuit that converts a three-phase load current and outputs the kth harmonic current as a DC component by a rotary coordinate system that rotates by a value multiplied by an angular frequency, and the converted DC component as the rotary coordinate conversion. And an inverse rotation coordinate conversion circuit that outputs the k-th harmonic current signal by performing the inverse conversion of the above, and an active filter characterized by rapidly detecting and compensating the k-th high-frequency current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6210313A JPH0880052A (en) | 1994-09-05 | 1994-09-05 | Active filter for power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6210313A JPH0880052A (en) | 1994-09-05 | 1994-09-05 | Active filter for power |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0880052A true JPH0880052A (en) | 1996-03-22 |
Family
ID=16587354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6210313A Pending JPH0880052A (en) | 1994-09-05 | 1994-09-05 | Active filter for power |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0880052A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002315375A (en) * | 2001-04-18 | 2002-10-25 | Yaskawa Electric Corp | Motor controller |
| WO2014175214A1 (en) | 2013-04-26 | 2014-10-30 | 富士電機株式会社 | Resonance suppression device |
| WO2014203394A1 (en) | 2013-06-21 | 2014-12-24 | 富士電機株式会社 | Resonance suppression device |
| JP2017158234A (en) * | 2016-02-29 | 2017-09-07 | ニチコン株式会社 | Harmonic compensation device |
-
1994
- 1994-09-05 JP JP6210313A patent/JPH0880052A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002315375A (en) * | 2001-04-18 | 2002-10-25 | Yaskawa Electric Corp | Motor controller |
| WO2002087065A1 (en) * | 2001-04-18 | 2002-10-31 | Kabushiki Kaisha Yaskawa Denki | Motor controller |
| WO2014175214A1 (en) | 2013-04-26 | 2014-10-30 | 富士電機株式会社 | Resonance suppression device |
| US9621023B2 (en) | 2013-04-26 | 2017-04-11 | Fuji Electric Co., Ltd. | Resonance suppression device |
| US9768616B2 (en) | 2013-04-26 | 2017-09-19 | Fuji Electric Co., Ltd. | Resonance suppression device |
| CN107863894A (en) * | 2013-04-26 | 2018-03-30 | 富士电机株式会社 | Resonance restraining device |
| EP3487057A1 (en) | 2013-04-26 | 2019-05-22 | Fuji Electric Co., Ltd. | Resonance suppression device |
| CN107863894B (en) * | 2013-04-26 | 2020-07-21 | 富士电机株式会社 | Resonance suppression device |
| WO2014203394A1 (en) | 2013-06-21 | 2014-12-24 | 富士電機株式会社 | Resonance suppression device |
| US9590485B2 (en) | 2013-06-21 | 2017-03-07 | Fuji Electric Co., Ltd. | Resonance suppression device |
| JP2017158234A (en) * | 2016-02-29 | 2017-09-07 | ニチコン株式会社 | Harmonic compensation device |
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