JP2003102127A - Method for controlling active filter apparatus - Google Patents
Method for controlling active filter apparatusInfo
- Publication number
- JP2003102127A JP2003102127A JP2001292688A JP2001292688A JP2003102127A JP 2003102127 A JP2003102127 A JP 2003102127A JP 2001292688 A JP2001292688 A JP 2001292688A JP 2001292688 A JP2001292688 A JP 2001292688A JP 2003102127 A JP2003102127 A JP 2003102127A
- Authority
- JP
- Japan
- Prior art keywords
- harmonic
- output
- current
- filter means
- fundamental wave
- 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
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]
【発明の属する分野】本発明は、負荷と並列接続するア
クティブフィルタ装置に於いて、精度良く高調波電流成
分を抑制する制御方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control method for accurately suppressing a harmonic current component in an active filter device connected in parallel with a load.
【０００２】[0002]
【従来の技術】従来より、電源ラインの高周波抑制や力
率改善にアクティブフィルタ装置が用いられ、またコン
デンサインプット型回路や整流器等の非線型負荷では高
調波成分が発生し、電源の負担が大きくなることから、
負荷電流の高調波成分を検出して、電源ラインの高調波
成分を打ち消すように入力信号を入れて、電源ラインの
高周波電流成分を抑制するアクティブフィルタ装置が開
示されている。2. Description of the Related Art Conventionally, active filter devices have been used to suppress high frequency power lines and improve power factor, and harmonic components are generated in non-linear loads such as capacitor input type circuits and rectifiers, resulting in a large load on the power source. Because
An active filter device is disclosed which detects a harmonic component of a load current, inputs an input signal so as to cancel the harmonic component of a power supply line, and suppresses a high frequency current component of the power supply line.
【０００３】図５には従来のアクティブフィルタ装置の
一例を示しているが、この例のように単相に限らず、３
相３線式、もしくは３相４線式のアクティブフィルタ装
置を含めて、電源から電源ラインを通って負荷に供給さ
れ、負荷ラインにカレントトランスのような検出器を用
いて電流を検出しこの出力信号を制御手段に入れ、制御
手段は基本波阻止フィルタ手段や複数の高調波フィルタ
手段を備えており高調波成分を出力してアクティブフィ
ルタ装置により電源ラインの高調波を打ち消す方法で電
源ラインの高調波を除去している。FIG. 5 shows an example of a conventional active filter device, but it is not limited to a single phase as in this example, and 3
Including an active filter device of three-phase three-wire type or three-phase four-wire type, it is supplied from the power supply to the load through the power supply line, and the current is detected in the load line using a detector such as a current transformer, and this output is output. The signal is input to the control means, and the control means is provided with a fundamental wave blocking filter means and a plurality of harmonic filter means.The harmonic component of the power line is canceled by outputting the harmonic component and canceling the harmonic of the power line by the active filter device. Removing the waves.
【０００４】従来のアクティブフィルタ装置の制御方式
は図４に示すように基本波及び高調波阻止フィルタ手段
であるノッチフィルタを用いただけで、任意に設定した
高調波成分のみを抑制させるように設定できない場合
や、負荷と電流出力回路のフィルタ構成により、ある次
数の電流成分の範囲で異常発振するという問題があっ
た。As shown in FIG. 4, the conventional active filter device control method uses only a notch filter which is a fundamental wave and harmonic wave prevention filter means, and cannot be set so as to suppress only an arbitrarily set harmonic wave component. In some cases, depending on the load and the filter configuration of the current output circuit, there is a problem that abnormal oscillation occurs in the range of the current component of a certain order.
【０００５】また、基本波の周波数が変動した場合、基
本波ノッチフィルタの出力に基本波成分が現われてしま
い、電源の電圧と電流の位相差が増大することになる。
さらに高調波成分の周波数変化にも対応していない。When the frequency of the fundamental wave fluctuates, the fundamental wave component appears in the output of the fundamental wave notch filter, and the phase difference between the voltage and the current of the power source increases.
Furthermore, it does not support frequency changes of harmonic components.
【０００６】すなわち従来のアクティブフィルタはアナ
ログフィルタで負荷電流を検出した信号で基本波阻止フ
ィルタ手段であるノッチフィルタにより基本波のみを修
正して出力する制御方式であるため、基本波周波数変動
に対して伝達関数の特性により基本波周波数が基本波ノ
ッチフィルタの共振点からずれてしまうことで阻止領域
からはずれてしまい、基本波ノッチフィルタの出力に基
本波成分が現われる。That is, since the conventional active filter is a control system in which only the fundamental wave is corrected and output by the notch filter, which is the fundamental wave blocking filter means, with the signal obtained by detecting the load current by the analog filter, the fundamental wave frequency fluctuation As a result, the fundamental wave frequency deviates from the resonance point of the fundamental wave notch filter due to the characteristics of the transfer function, so that the fundamental wave frequency deviates from the blocking region, and a fundamental wave component appears in the output of the fundamental wave notch filter.
【０００７】従来のアクティブフィルタ装置の制御構成
を図で示すと図５のようになり、抑制したい任意の高調
波成分を設定することなく、さらに高調波成分の周波数
変化にも対応してないので、負荷電圧が不安定で、さら
に効率の悪い電源装置になってしまうなどの問題があっ
た。The control configuration of the conventional active filter device is shown in FIG. 5 as shown in FIG. 5, which does not set an arbitrary harmonic component to be suppressed and does not correspond to the frequency change of the harmonic component. However, there is a problem that the load voltage is unstable and the power supply device becomes inefficient.
【０００８】[0008]
【本発明が解決しようとする課題】本発明は、上記従来
技術の問題点を鑑みてなされたもので、その目的は、任
意に設定した高調波電流成分を抑制し、電源の基本周波
数の変動に応じることのできるアクティブフィルタ装置
の制御方法を提供できる。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and its purpose is to suppress an arbitrarily set harmonic current component and to fluctuate the fundamental frequency of a power supply. It is possible to provide a method of controlling the active filter device that can comply with the above.
【０００９】[0009]
【課題を解決しようとする手段】上記目的を達成するた
めになされた請求項記載の発明は、アクティブフィルタ
装置において、任意に設定した高調波電流を抑制させ、
基本波の周波数変動に対応して、基本波周波数の設定を
変更し、高調波の周波数変動に対しても基本波の周波数
信号により、高調波電流を抑制できることを特徴とする
アクティブフィルタ装置の制御方法を提供するものであ
る。SUMMARY OF THE INVENTION The invention as set forth in the claims made to achieve the above object is to suppress an arbitrarily set harmonic current in an active filter device,
Control of the active filter device characterized by changing the setting of the fundamental frequency in response to the frequency fluctuation of the fundamental wave and suppressing the harmonic current by the frequency signal of the fundamental wave even with the frequency fluctuation of the harmonic It provides a method.
【００１０】すなわちアクティブフィルタ装置における
高調波成分抽出手段において、基本波阻止フィルタ手段
と複数の直列に接続された高調波阻止フィルタ手段を直
列に接続し、前記複数の直列に接続された高調波阻止フ
ィルタの最終高調波阻止フィルタ手段の出力を基本波阻
止フィルタ手段の出力から減算して出力し、任意に設定
した高調波成分のみを得て、電源ラインの任意に設定し
た高調波電流成分のみを抑制する制御方法を提供するも
のである。That is, in the harmonic component extraction means in the active filter device, the fundamental wave blocking filter means and a plurality of series-connected harmonic blocking filter means are connected in series, and the plurality of series-connected harmonic blocking elements are connected. The output of the filter's final harmonic blocking filter means is subtracted from the output of the fundamental blocking filter's output to obtain only the arbitrarily set harmonic component, and only the arbitrarily set harmonic current component of the power supply line is obtained. A control method for suppressing is provided.
【００１１】別の手段としては、アクティブフィルタ装
置における高調波成分抽出手段において、前記直列に配
置された高調波阻止フィルタ手段を並列に配置された高
調波通過フィルタ手段に置き換えて、それぞれの高調波
通過フィルタ手段の出力を加算して得られた出力によ
り、任意に設定した高調波成分のみを得て、電源ライン
の任意に設定した高調波電流成分のみを抑制する制御方
法を提供するものである。As another means, in the harmonic component extraction means in the active filter device, the harmonic blocking filter means arranged in series is replaced with the harmonic pass filter means arranged in parallel, and the respective harmonics are replaced. Provided is a control method in which only an arbitrarily set harmonic component is obtained by an output obtained by adding outputs of pass-pass filter means and only an arbitrarily set harmonic current component of a power supply line is suppressed. .
【００１２】また、基本波の周波数信号を取り込むこと
で、任意に設定した高調波成分に、基本波の周波数変動
に対して得られた基本波周波数信号を使い、抑制したい
高調波電流成分のそれぞれに周波数の設定を変更し、高
調波電流を抑制する制御方法を提供するものである。Further, by taking in the frequency signal of the fundamental wave, the fundamental wave frequency signal obtained with respect to the frequency fluctuation of the fundamental wave is used for the arbitrarily set harmonic wave component, and each of the harmonic current components to be suppressed is obtained. The present invention provides a control method in which the frequency setting is changed to suppress the harmonic current.
【００１３】これにより基本波の周波数が変動した場合
でも基本波阻止フィルタ手段の出力には基本波成分が現
われず、さらに高調波に対してもそれぞれに確実なフィ
ルタ出力を提供することが可能で、電源ラインにある高
調波電流成分を除くことができ、力率を改善した効率の
良いアクティブフィルタとして利用することが可能であ
る。As a result, even if the frequency of the fundamental wave fluctuates, the fundamental wave component does not appear in the output of the fundamental wave blocking filter means, and it is possible to provide a reliable filter output for each harmonic. The harmonic current component in the power supply line can be removed, and it can be used as an efficient active filter with improved power factor.
【００１４】周波数変動補正手段から出力された周波数
補正信号をｎ次高調波成分の次数ｎの２乗倍して得た信
号を抑制したい各次数の高調波フィルタに与え、これら
の信号を減算もしくは加算することでアクティブフィル
タ装置の制御手段からアクティブフィルタ装置に制御信
号を入力して電源ラインの高調波電流成分を打ち消し、
効率の良い電力を供給できる。A signal obtained by multiplying the frequency correction signal output from the frequency fluctuation correcting means by the square of the order n of the nth order harmonic component is given to a harmonic filter of each order to be suppressed, and these signals are subtracted or By adding a control signal from the control means of the active filter device to the active filter device to cancel the harmonic current component of the power supply line,
Efficient power can be supplied.
【００１５】アクティブフィルタ装置において、任意に
設定した高調波成分のみを抑制させるように設定できた
ことにより、負荷と電流出力回路のフィルタ構成によ
る、異常発振する範囲の次数の電流成分を電流出力回路
の出力電流に出力させないことで、異常発振するという
問題を解決できる。Since the active filter device can be set so as to suppress only the arbitrarily set harmonic component, the current output circuit outputs the current component of the order of the abnormal oscillation range by the filter configuration of the load and the current output circuit. The problem of abnormal oscillation can be solved by preventing the output current from being output.
【００１６】基本波の周波数が変動してもそれに応じた
高調波周波数に合致できるため、わずかな変動に対して
ももしくは大きな変動に対しても基本波の周波数に対応
した高調波を選択できるため、基本波の周波数変動に対
して安定した制御手段でアクティブフィルタ装置を駆動
できる。Even if the frequency of the fundamental wave fluctuates, the harmonic frequency corresponding to the fluctuation can be matched, so that the harmonic wave corresponding to the frequency of the fundamental wave can be selected for a slight fluctuation or a large fluctuation. The active filter device can be driven by the control means that is stable with respect to the frequency fluctuation of the fundamental wave.
【００１７】[0017]
【発明の実施の形態】以下、添付図面を用いて本発明に
係わるアクティブフィルタの制御手段の実施形態を説明
する。なお、図面の説明において同一部材には同じ符号
を付し、重複する説明は省略する。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of control means for an active filter according to the present invention will be described below with reference to the accompanying drawings. In the description of the drawings, the same members will be denoted by the same reference symbols, without redundant description.
【００１８】図１、図２は本発明の実施形態の一例を示
しており、図１、図２はそのブロック図である。このブ
ロック図は図３に示す本発明によるアクティブフィルタ
装置２８において、その制御手段１３をブロック図にし
たものである。1 and 2 show an example of an embodiment of the present invention, and FIGS. 1 and 2 are block diagrams thereof. This block diagram is a block diagram of the control means 13 of the active filter device 28 according to the present invention shown in FIG.
【００１９】図３、図７は本発明によるアクティブフィ
ルタ装置２８の構成を示すブロック図であり、交流入力
電圧源１１に接続された負荷１２と並列に接続されてい
る。従来のアクティブフィルタ装置２８に周波数検出手
段１７を新たに設けており、周波数の誤差を電圧値で出
力し、以下に説明するように制御手段１３で周波数の変
動に対して制御し、制御手段１３の出力を電流指令パル
ス出力手段３４に入力し電流指令パルスを電流出力回路
１４に入力し、精度良く高調波電流成分を抑制する制御
を特徴としている。FIGS. 3 and 7 are block diagrams showing the configuration of the active filter device 28 according to the present invention, which is connected in parallel with the load 12 connected to the AC input voltage source 11. A frequency detecting means 17 is newly provided in the conventional active filter device 28, the error of the frequency is output as a voltage value, and the control means 13 controls the fluctuation of the frequency as described below, and the control means 13 The output is input to the current command pulse output means 34, the current command pulse is input to the current output circuit 14, and the harmonic current component is controlled with high accuracy.
【００２０】なお、図３は、負荷ライン１８に流れる電
流を検出するために負荷電流検出部１５を設けてあり、
図７は、電源ライン１６に流れる電流を検出するための
電圧源電流検出部３２を負荷電流検出部１５の代わりに
設けて、電圧源電流検出部３２の検出結果と出力電流検
出部１９の検出結果より、負荷ライン１８に流れる電流
を検出するための負荷電流検出部１５の検出結果と同じ
値を得る。図３、図７の直流電圧検出部２４は、絶縁ト
ランスや分圧抵抗などのような主コンデンサ２６に印加
する直流電圧２７を検出するためのものである。In FIG. 3, a load current detector 15 is provided to detect the current flowing through the load line 18,
In FIG. 7, a voltage source current detection unit 32 for detecting the current flowing through the power supply line 16 is provided instead of the load current detection unit 15, and the detection result of the voltage source current detection unit 32 and the detection of the output current detection unit 19 are performed. From the result, the same value as the detection result of the load current detector 15 for detecting the current flowing through the load line 18 is obtained. The DC voltage detector 24 of FIGS. 3 and 7 is for detecting the DC voltage 27 applied to the main capacitor 26 such as an insulating transformer or a voltage dividing resistor.
【００２１】図１と図２のフィルタ手段における伝達関
数の次数は、何次系でもよく、一例として２次系のフィ
ルタであれば、下記数１で表される。伝達関数Ｇは、２
次系のフィルタの伝達関数で、ＡとＢとＣとＤは、定数
であり、ｓは微分記号ｄ／ｄｔを置き換えたラプラス変
数である。例えば、５０Ｈｚ阻止フィルタであれば、定
数Ａを１、定数Ｂを０、定数Ｃを１、定数Ｄを２００と
し、変数Ｆは角周波数の２乗である（２π５０）２であ
る。伝達関数Ｇは、定数Ｄの値が小さいほど阻止領域の
傾きが急勾配な周波数特性になる。The order of the transfer function in the filter means of FIGS. 1 and 2 may be any order system, and as an example, a filter of the second order system is expressed by the following expression 1. The transfer function G is 2
In the transfer function of the filter of the next system, A, B, C, and D are constants, and s is a Laplace variable replacing the differential symbol d / dt. For example, in the case of a 50 Hz blocking filter, the constant A is 1, the constant B is 0, the constant C is 1, the constant D is 200, and the variable F is the square of the angular frequency (2π50) 2 . The smaller the value of the constant D is, the transfer function G has a frequency characteristic in which the slope of the blocking region is steeper.
【数１】G=(A・s２＋B・s＋F)／（C・s２＋D・s＋F）[Equation 1] G = (A · s 2 + B · s + F) / (C · s 2 + D · s + F)
【００２２】図１について詳細な説明を加える。図３に
おける周波数検出手段１７の一例として、周波数検出信
号Ｖｆは基本波の周波数からの誤差分を電圧に置き換え
たもので例えば５０Ｈｚに基本周波数を設定し５１Ｈｚ
で＋１０Ｖ、４９Ｈｚで−１０Ｖのようにして得られる
電圧であり、周波数変動補正手段１でデジタルのパルス
列に変換しその周波数は周波数検出信号Ｖｆで入力され
た電圧に応じて変換され、各次数の高調波阻止フィルタ
手段は周波数補正手段１の出力信号である変数Ｆから各
次数ｎの２乗倍にして各高調波阻止フィルタ手段の変数
Ｆに入力している。A detailed description will be added to FIG. As an example of the frequency detection means 17 in FIG. 3, the frequency detection signal Vf is obtained by replacing the error component from the frequency of the fundamental wave with a voltage. For example, the fundamental frequency is set to 50 Hz and 51 Hz.
Is a voltage obtained as +10 V at −10 V and −10 V at 49 Hz, and is converted into a digital pulse train by the frequency fluctuation correcting means 1 and its frequency is converted according to the voltage input by the frequency detection signal Vf. The harmonic elimination filter means outputs the variable F, which is the output signal of the frequency correction means 1, to the variable F of each harmonic elimination filter means after multiplying each order n squared.
【００２３】一方入力Ｖｉｎは負荷ラインのカレントト
ランスなどで得られた負荷電流検出部１５の出力であ
り、高調波電流成分を含む信号で、基本波成分は基本波
阻止フィルタ手段２により阻止され、任意に設定した第
３次高調波と第５次高調波のみ出力する信号である出力
Ｖｏｕｔは基本波阻止フィルタ手段２を通して得た信号
を第５次高調波阻止フィルタ手段５の出力信号から減算
して出力することで、電源ラインの高調波を抑制させる
出力を与える制御信号の基になる。On the other hand, the input Vin is the output of the load current detection unit 15 obtained by a current transformer of the load line, is a signal containing a harmonic current component, and the fundamental wave component is blocked by the fundamental wave blocking filter means 2. The output Vout, which is a signal that outputs only the third harmonic and the fifth harmonic that are arbitrarily set, is obtained by subtracting the signal obtained through the fundamental wave blocking filter means 2 from the output signal of the fifth harmonic blocking filter means 5. Output as a base of a control signal that gives an output for suppressing harmonics of the power supply line.
【００２４】図１は制御手段１３のブロック図で電源ラ
イン電流の第３次高調波と第５次高調波を除去する例
で、入力Ｖｉｎは各相毎に検出する負荷電流検出部１５
の検出結果による信号であり、入力Ｖｉｎは基本波阻止
フィルタ手段２に入力され、基本波阻止フィルタ手段２
と第３次高調波阻止フィルタ手段３と第５次高調波阻止
フィルタ手段５を直列に接続し、基本波阻止フィルタ手
段２の出力からの信号を加算し、第５次高調波遮断フィ
ルタ手段５の出力を減算する加減算器７に加え出力Ｖｏ
ｕｔを得ている。FIG. 1 is a block diagram of the control means 13, showing an example of removing the third and fifth harmonics of the power supply line current. The input current Vin is a load current detector 15 for detecting each phase.
The input Vin is input to the fundamental wave blocking filter means 2 and is a signal resulting from the detection result of
And the third-order harmonic blocking filter means 3 and the fifth-order harmonic blocking filter means 5 are connected in series, the signals from the output of the fundamental-wave blocking filter means 2 are added, and the fifth-order harmonic blocking filter means 5 is added. Output Vo is added to the adder / subtractor 7 for subtracting the output of
I'm getting ut.
【００２５】一方角周波数の２乗手段３１は、周波数検
出手段１７から周波数を電圧変換して周波数変動補正手
段１で得た信号を基本波阻止フィルタ手段２の伝達関数
の変数Ｆに書き換えて周波数補正を行い、第３次高調波
阻止フィルタ手段３の変数Ｆには周波数変動補正手段１
の信号をｎの２乗倍手段４により、次数３の２乗値即ち
９倍にして書き換え、第５次高調波阻止フィルタ手段５
は周波数変動補正手段１の信号にｎの２乗倍手段６を用
いて、次数５の２乗値である２５倍にして第５次高調波
阻止フィルタ手段５の変数Ｆを書き換えて制御してい
る。On the other hand, the angular frequency squaring means 31 converts the frequency from the frequency detecting means 17 into a voltage and rewrites the signal obtained by the frequency fluctuation correcting means 1 into the variable F of the transfer function of the fundamental wave blocking filter means 2 to change the frequency. Correction is performed, and the frequency fluctuation correction means 1 is used for the variable F of the third harmonic wave blocking filter means 3.
Signal is rewritten into a squared value of order 3, that is, 9 times, by the n-square multiplication means 4, and the fifth-order harmonic blocking filter means 5 is rewritten.
Is controlled by rewriting the variable F of the fifth-order harmonic blocking filter means 5 by using the n-square multiplication means 6 for the signal of the frequency fluctuation correction means 1 to make it 25 times, which is the squared value of the order 5. There is.
【００２６】次に、高調波電流抽出手段３３の出力結果
である出力Ｖｏｕｔと出力電流検出部１９の検出結果で
ある出力電流信号Vｉｃとの差分を減算器２１を用いて
求め、電流出力回路１４は、減算器２１の出力結果が差
分を小さくするように任意に設定した第３次高調波成分
と第５次高調波成分に近似した電流を出力する。Next, the difference between the output Vout which is the output result of the harmonic current extraction means 33 and the output current signal Vic which is the detection result of the output current detection unit 19 is obtained by using the subtractor 21, and the current output circuit 14 Outputs a current approximated to the third harmonic component and the fifth harmonic component, which are arbitrarily set so that the difference between the output results of the subtractor 21 is small.
【００２７】さらに、補助制御手段３０の出力信号ｈ２
は、電流出力回路１４に並列接続された主コンデンサ２
６に印加された直流電圧検出部２７の検出結果である直
流電圧Ｖｄｃと基準信号Ｖｒｅｆを減算器２３を用いて
減算した信号と電源電圧検出部２０の検出結果である交
流入力電源電圧Ｖｉを乗算器２２を用いて乗算したもの
であり、直流電圧Ｖｄｃを一定に保ちつつ、電流出力回
路の出力電流２９を交流入力電源電圧Ｖｉの位相と同期
させることができる。出力ｙは、減算器２１の出力結果
と出力信号ｈ２を加算器２５を用いて加算した値であ
り、電流指令パルス出力手段３４の入力信号となる。Further, the output signal h2 of the auxiliary control means 30
Is the main capacitor 2 connected in parallel to the current output circuit 14.
6, the signal obtained by subtracting the DC voltage Vdc, which is the detection result of the DC voltage detection unit 27 and the reference signal Vref, using the subtractor 23, and the AC input power supply voltage Vi that is the detection result of the power supply voltage detection unit 20 are multiplied. The output current 29 of the current output circuit can be synchronized with the phase of the AC input power supply voltage Vi while keeping the DC voltage Vdc constant. The output y is a value obtained by adding the output result of the subtractor 21 and the output signal h2 using the adder 25, and becomes the input signal of the current command pulse output means 34.
【００２８】図２においては並列にフィルタ手段を配置
したもので阻止の代りに通過フィルタである第３次高調
波通過フィルタ手段８と第５次高調波通過フィルタ手段
９を用意してそれぞれの出力を加算器１０を用いて加算
して抑制する周波数の信号である出力Ｖｏｕｔをアクテ
ィブフィルタ装置２８の制御信号の基とすることで、電
源ライン１６から任意に設定した高調波電流成分を抑制
させる出力を与える制御手段１３になる。In FIG. 2, filter means are arranged in parallel, and instead of blocking, third-order harmonic pass filter means 8 and fifth-order harmonic pass filter means 9 which are pass filters are prepared and the respective outputs are provided. Is added by using the adder 10 and the output Vout, which is a signal of a frequency to be suppressed, is used as the basis of the control signal of the active filter device 28, and an output for suppressing a harmonic current component arbitrarily set from the power supply line 16 is output. It becomes the control means 13 for giving.
【００２９】図２は図１の第３次高調波阻止フィルタ手
段３と第５次高調波阻止フィルタ手段５を並列にするた
めのもので第３次高調波通過フィルタ手段８と第５次高
調波通過フィルタ手段９を用いることによって図１に示
した制御手段と同等の効果を示すものである。FIG. 2 is for connecting the third-order harmonic blocking filter means 3 and the fifth-order harmonic blocking filter means 5 in FIG. 1 in parallel. The third-order harmonic pass filter means 8 and the fifth-order harmonic filtering means are shown in FIG. By using the wave-pass filter means 9, the same effect as the control means shown in FIG. 1 is exhibited.
【００３０】上記は第３次高調波と第５次高調波を抑制
するように構成した例で、第７次以上の高調波において
も任意に設定でき、また２つの高調波のみならず複数の
高調波を選択でき、直列もしくは並列のフィルタを構成
することで、任意に設定した高調波電流を抑制させる制
御方法が可能になる。The above is an example in which the third harmonic and the fifth harmonic are suppressed, and the seventh harmonic and higher harmonics can be arbitrarily set. In addition to the two harmonics, a plurality of harmonics can be set. A harmonic can be selected, and by configuring a series or parallel filter, a control method for suppressing an arbitrarily set harmonic current becomes possible.
【００３１】図６は、図１の制御手段１３中のブロック
をアナログ回路の使用なしで、マイコン等を使用してデ
ジタル的に制御する場合の実施の一形態における動作の
一例を示すフローチャートである。この際に図３におけ
る周波数検出手段１７や電流指令パルス出力手段３４
は、制御手段１３内で処理してもよい。各検出信号が入
力される前に、各種のパラメータを設定しておく。例え
ば、各フィルタの伝達関数Ｇの式における定数Ａと定数
Ｂと定数Ｃと定数Ｄや、電流出力回路１４に並列接続さ
れた主コンデンサ２６に印加する直流電圧の基準電圧Ｖ
ｒｅｆなどをあらかじめ設定しておく。なお、フローチ
ャートにおける微分記号ｓや積分記号１／ｓで示された
式は、実際にはデジタルであるため周知のとおりＺ変換
法（例えば、美多 勉 著「ディジタル制御理論」昭晃
堂発行参照）を用いて離散時間領域の式に変換して、プ
ログラミングして演算する。FIG. 6 is a flow chart showing an example of the operation in one embodiment in the case where the blocks in the control means 13 in FIG. 1 are digitally controlled by using a microcomputer or the like without using an analog circuit. . At this time, the frequency detection means 17 and the current command pulse output means 34 shown in FIG.
May be processed in the control means 13. Various parameters are set before each detection signal is input. For example, the constant A, the constant B, the constant C, and the constant D in the formula of the transfer function G of each filter, and the reference voltage V of the DC voltage applied to the main capacitor 26 connected in parallel to the current output circuit 14.
Ref etc. are set in advance. Since the equations shown by the differential symbol s and the integral symbol 1 / s in the flow chart are actually digital, the Z conversion method is well known (see, for example, Tsutomu Mita, "Digital Control Theory," published by Shokoido). ) Is used to convert to a discrete-time domain expression, and programming is performed.
【００３２】各検出信号をＡ／Ｄ変換器により変換した
後に、ステップＳ３１において変換した各検出信号を入
力し、保持する。そして、必要に応じて前記変換した各
検出信号を取り出す。次にステップＳ３２とステップＳ
３３においてステップＳ３１で取り出した周波数検出信
号Ｖｆを入力し周波数補正手段１の出力に相当する角周
波数Ｆ１を得る。つまり、ステップＳ３２において、周
波数検出信号Ｖｆから基本波周波数ｆを得て、ステップ
Ｓ３３で前記基本波周波数ｆを用いて、基本波角周波数
の２乗を演算する。After each detection signal is converted by the A / D converter, each detection signal converted in step S31 is input and held. Then, if necessary, the converted detection signals are extracted. Next, step S32 and step S
In 33, the frequency detection signal Vf extracted in step S31 is input and the angular frequency F1 corresponding to the output of the frequency correction means 1 is obtained. That is, in step S32, the fundamental wave frequency f is obtained from the frequency detection signal Vf, and in step S33, the fundamental wave frequency f is used to calculate the square of the fundamental wave angular frequency.
【００３３】基本波阻止フィルタ手段２は、ステップＳ
３４において、定数Ａと定数Ｂと定数Ｃと定数Ｄとステ
ップＳ３３で得られた値Ｆ１をもとに入力Ｖｉｎを基本
波阻止演算し角周波数Ｖ１を得る。次数ｎの２乗手段４
はステップＳ３５において基本波角周波数Ｆ１を９倍す
るものであり第３次高調波角周波数Ｆ３を出力し、次数
ｎの２乗手段６はステップＳ３６において基本波角周波
数Ｆ１を２５倍し第５次高調波角周波数Ｆ５を出力する
ものである。The fundamental wave blocking filter means 2 performs step S
In step 34, the input Vin is subjected to the fundamental wave blocking calculation based on the constant A, the constant B, the constant C, the constant D, and the value F1 obtained in step S33 to obtain the angular frequency V1. Square means 4 of order n
Outputs the third harmonic angular frequency F3 by multiplying the fundamental angular frequency F1 by 9 in step S35, and the square means 6 of the order n multiplies the fundamental angular frequency F1 by 25 in step S36. The second harmonic angular frequency F5 is output.
【００３４】ステップＳ３７は、定数Ａと定数Ｂと定数
Ｃと定数ＤとステップＳ３５で得られた第３次高調波角
周波数Ｆ３をもとにステップＳ３４の演算結果の基本波
出力Ｖ１を第３次高調波阻止演算し、第３次高調波阻止
フィルタ手段３に相当するもので第３次高調波出力Ｖ３
を得て、ステップＳ３８は、定数Ａと定数Ｂと定数Ｃと
定数ＤとステップＳ３６で得られた第５次高調波角周波
数Ｆ５をもとにステップＳ３７の演算結果の値、第３次
高調波出力Ｖ３を第５次高調波阻止演算し、第５次高調
波阻止フィルタ手段５に相当するものであり第５次高調
波出力Ｖ５を得る。さらにステップＳ３９は、基本波出
力Ｖ１から第５次高調波出力Ｖ５を減算し出力Ｖｏｕｔ
を得る。In step S37, the fundamental wave output V1 obtained as a result of the calculation in step S34 is calculated based on the constant A, the constant B, the constant C, the constant D, and the third harmonic angular frequency F3 obtained in step S35. Third-harmonic blocking calculation is performed, and the third-harmonic blocking filter means 3 corresponds to the third-harmonic output V3.
In step S38, the value of the calculation result in step S37, the third harmonic, is calculated based on the constant A, the constant B, the constant C, the constant D, and the fifth harmonic angular frequency F5 obtained in step S36. The wave output V3 is subjected to a fifth-harmonic blocking operation to obtain a fifth-harmonic output V5, which corresponds to the fifth-harmonic blocking filter means 5. Further, in step S39, the fifth harmonic output V5 is subtracted from the fundamental wave output V1 to obtain the output Vout.
To get
【００３５】ステップＳ４３は、図１の減算器２１に相
当するものであり、出力Ｖｏｕｔから、電流出力回路の
出力電流２９の検出結果をデジタル変換した出力電流信
号Ｖｉｃを減算して高調波電流抑制信号ｈ３を得る。さ
らに補助制御手段３０における演算は、先ず、ステップ
Ｓ４０において、基準信号Ｖｒｅｆと直流電圧の検出結
果をデジタル変換した直流電圧Ｖｄｃの誤差ｅを計算
し、ステップＳ４１において、誤差ｅを減らすためＰＩ
Ｄ制御演算を行い出力信号ｈ１を得る。さらにステップ
Ｓ４２において、出力信号ｈ１と電源電圧検出部の検出
結果をデジタル変換した交流入力電源電圧Ｖｉを掛け算
し出力信号ｈ２を得て、この出力信号ｈ２が補助制御手
段３０の出力値に相当する。Step S43 corresponds to the subtracter 21 in FIG. 1, and subtracts the output current signal Vic obtained by digitally converting the detection result of the output current 29 of the current output circuit from the output Vout to suppress the harmonic current. Obtain the signal h3. Further, in the calculation in the auxiliary control means 30, first, in step S40, the error e between the reference signal Vref and the DC voltage Vdc obtained by digitally converting the detection result of the DC voltage is calculated, and in step S41, the error e is reduced by PI.
The D control calculation is performed to obtain the output signal h1. Further, in step S42, the output signal h1 is multiplied by the AC input power supply voltage Vi obtained by digitally converting the detection result of the power supply voltage detection unit to obtain an output signal h2, and this output signal h2 corresponds to the output value of the auxiliary control means 30. .
【００３６】ステップＳ４４は、高調波電流抑制信号ｈ
３をＰＩＤ制御演算したものであり出力信号ｈ４を得
て、ステップＳ４５において、出力信号ｈ２と出力信号
ｈ４を加算し、電流指令パルス出力手段３４への入力信
号ｙを得て、このｙを出力する。上述したステップＳ３
１〜ステップＳ４５の処理を繰り返し実行されることに
より、図１の制御手段中のブロックをアナログ回路の使
用なしで、マイコン等を使用してデジタル的に図３にお
ける電流出力回路１４を制御することが可能となる。In step S44, the harmonic current suppression signal h
3 is obtained by PID control calculation, and an output signal h4 is obtained. In step S45, the output signal h2 and the output signal h4 are added to obtain an input signal y to the current command pulse output means 34, and this y is output. To do. Step S3 described above
By repeatedly executing the processing of 1 to step S45, the block in the control means of FIG. 1 is digitally controlled by a microcomputer or the like without using an analog circuit to control the current output circuit 14 in FIG. Is possible.
【００３７】請求項３に記載のようにアクティブフィル
タ装置２８の制御方法において、各相毎に検出する負荷
電流検出部１５の検出結果から負荷に流れる電流の任意
に設定した高調波成分を各高調波成分毎に抽出する高調
波成分抽出手段３３を設け、基本波、高調波の直列並列
を問わず、それぞれ目的とする周波数に対して個別に電
流出力回路１４を各高調波成分毎に出力する電流とする
ことも可能である。In the control method of the active filter device 28 according to the third aspect, the harmonic components, which are arbitrarily set, of the current flowing through the load based on the detection result of the load current detection unit 15 which detects for each phase are obtained. Harmonic component extraction means 33 for extracting each wave component is provided, and the current output circuit 14 is output for each harmonic component individually for each target frequency, regardless of whether the fundamental wave or the harmonics are connected in series. It can also be an electric current.
【００３８】請求項４のように交流電圧源から各相毎に
出力する電流を検出する電圧源電流検出部３２と電流出
力回路１４から各相毎に出力する電流を検出する出力電
流検出部１９を設け、電圧源電流検出部３２の検出結果
と出力電流検出部１９の検出結果の差分を求める演算手
段とを有し、前記演算手段の出力を負荷電流検出部１５
の検出結果の代替とすることも電源ライン１６に含まれ
る高調波の周波数成分を抑制することが可能である。According to a fourth aspect of the present invention, the voltage source current detector 32 for detecting the current output from the AC voltage source for each phase and the output current detector 19 for detecting the current output from the current output circuit 14 for each phase. And a calculation means for obtaining the difference between the detection result of the voltage source current detection section 32 and the detection result of the output current detection section 19, and the output of the calculation means is provided to the load current detection section 15
It is also possible to suppress the frequency component of the higher harmonic wave contained in the power supply line 16 by substituting the detection result of the above.
【００３９】[0039]
【発明の効果】アクティブフィルタ装置２８において、
任意に設定した高調波電流を抑制させ、基本波の周波数
変動に対して、基本波周波数の設定を変更し、高調波に
対しても基本波の周波数信号により、高調波電流を抑制
できることを特徴とするアクティブフィルタ装置２８の
制御方法を提供するものである。In the active filter device 28,
It is possible to suppress the harmonic current that is set arbitrarily, change the setting of the fundamental frequency in response to the frequency fluctuation of the fundamental wave, and suppress the harmonic current by using the frequency signal of the fundamental wave for the harmonics. A method of controlling the active filter device 28 is provided.
【００４０】[0040]
【図１】本発明の実施形態を示すアクティブフィルタ装
置制御手段の第１の実施例でそのブロック図である。FIG. 1 is a block diagram of a first example of active filter device control means showing an embodiment of the present invention.
【図２】本発明の実施形態を示す第２の実施例のブロッ
ク図である。FIG. 2 is a block diagram of a second example showing an embodiment of the present invention.
【図３】本発明のアクティブフィルタ装置を示すブロッ
ク図である。FIG. 3 is a block diagram showing an active filter device of the present invention.
【図４】従来のアクティブフィルタ装置の制御手段のブ
ロック図である。FIG. 4 is a block diagram of control means of a conventional active filter device.
【図５】従来のアクティブフィルタ装置を示すブロック
図である。FIG. 5 is a block diagram showing a conventional active filter device.
【図６】本発明の図３の制御手段中のブロックをアナロ
グ回路の使用なしで、マイコン等を使用してデジタル的
に制御する場合の実施の一形態における動作の一例を示
すフローチャートである。FIG. 6 is a flow chart showing an example of an operation in one embodiment when a block in the control means of FIG. 3 of the present invention is digitally controlled by using a microcomputer or the like without using an analog circuit.
【図７】本発明のアクティブフィルタ装置において電圧
源電流検出部を用いたブロック図である。FIG. 7 is a block diagram using a voltage source current detection unit in the active filter device of the present invention.
Ｖｉｎ、入力 Ｖｏｕｔ、出力 Ｖｒｅｆ、基準電圧 Ｖｄｃ、直流電圧 Ｖｉ、交流入力電源電圧 Ｖｆ、周波数検出信号 Ｖｉｃ、出力電流信号 １、周波数補正手段 ２、基本波阻止フィルタ手段 ３、第３次高調波阻止フィルタ手段 ４、６、ｎの２乗倍手段 ５、第５次高調波阻止フィルタ手段 ７、加減算器 ８、第３次高調波通過フィルタ手段 ９、第５次高調波通過フィルタ手段 １０、２５、加算器 １１、交流入力電圧源 １２、負荷 １３、制御手段 １４、電流出力回路 １５、負荷電流検出部 １６、電源ライン １７、周波数検出手段 １８、負荷ライン １９、出力電流検出部 ２０、電源電圧検出部 ２１、２３、減算器 ２２、乗算器 ２４、直流電圧検出部 ２６、主コンデンサ ２７、直流電圧 ２８、アクティブフィルタ装置 ２９、電流出力回路の出力電流 ３０、補助制御手段 ３１、角周波数の２乗出力手段 ３２、電圧源電流検出部 ３３、高調波成分抽出手段 ３４、電流指令パルス出力手段 Vin, input Vout, output Vref, reference voltage Vdc, DC voltage Vi, AC input power supply voltage Vf, frequency detection signal Vic, output current signal 1. Frequency correction means 2. Fundamental wave blocking filter means 3. Third harmonic blocking filter means Means for squaring 4, 6, and n 5, fifth harmonic blocking filter means 7, adder / subtractor 8. Third harmonic pass filter means 9. Fifth harmonic pass filter means 10, 25, adder 11, AC input voltage source 12, load 13, control means 14, current output circuit 15, load current detector 16, power line 17, frequency detection means 18, load line 19, output current detector 20, power supply voltage detector 21, 23, subtractor 22, multiplier 24, DC voltage detector 26 、 Main capacitor 27, DC voltage 28. Active filter device 29, output current of current output circuit 30, auxiliary control means 31, angular frequency square output means 32, voltage source current detector 33, harmonic component extraction means 34, current command pulse output means
Claims (4)
されたアクティブフィルタ装置において、前記負荷に流
れる電流を各相毎に検出する負荷電流検出部と、基本波
の角周波数信号の２乗を出力する周波数変動補正手段
と、基本波阻止フィルタ手段と複数の直列に接続された
任意のｎ次高調波阻止フィルタ手段を直列に接続し、前
記周波数変動補正手段の出力を基本波阻止フィルタ手段
と、周波数変動補正手段の出力である基本波の角周波数
信号の２乗をｎ次高調波阻止フィルタ手段の次数ｎの２
乗値と乗算して各高調波阻止フィルタ手段に供給し、前
記複数の直列に接続された高調波阻止フィルタ手段の最
終高調波阻止フィルタ手段の出力を基本波阻止フィルタ
手段の出力から減算した信号を基に電流出力回路に入力
し、前記電流出力回路の出力により任意に設定した高調
波成分のみを得て、電源ラインの任意に設定した高調波
電流成分のみを抑制したことを特徴としたアクティブフ
ィルタ装置の制御方法。1. In an active filter device connected in parallel with a load connected to an AC voltage source, a load current detector for detecting a current flowing in the load for each phase, and an angular frequency signal of a fundamental wave. A frequency fluctuation correcting means for outputting a power, a fundamental wave blocking filter means, and a plurality of arbitrary nth harmonic blocking filter means connected in series are connected in series, and the output of the frequency fluctuation correcting means is a fundamental wave blocking filter. Means and the square of the angular frequency signal of the fundamental wave, which is the output of the frequency fluctuation correcting means, is equal to 2 of the order n of the nth harmonic blocking filter means.
A signal obtained by multiplying by a multiplication value and supplying each to the harmonic rejection filter means, and subtracting the output of the final harmonic rejection filter means of the plurality of serially connected harmonic rejection filter means from the output of the fundamental wave rejection filter means. Based on the above, the active current is characterized in that only the arbitrarily set harmonic component is obtained by the output of the current output circuit, and only the arbitrarily set harmonic current component of the power supply line is suppressed. Control method of filter device.
制御方法において、基本波阻止フィルタ手段の出力を、
直列の高調波阻止フィルタ手段に代えて、並列にした複
数の高調波通過フィルタ手段のそれぞれに入力し、各高
調波通過フィルタ手段の出力を加算した信号を基に電流
出力回路に入力し、前記電流出力回路の出力により任意
に設定した高調波成分のみを得て、電源ラインの任意に
設定した高調波電流成分のみを抑制したことを特徴とす
るアクティブフィルタ装置の制御方法。2. A method of controlling an active filter device according to claim 1, wherein the output of the fundamental wave blocking filter means is
Instead of the series harmonic blocking filter means, each of the plurality of parallel harmonic pass filter means is input, and the output of each harmonic pass filter means is input to the current output circuit based on the added signal, A method for controlling an active filter device, wherein only an arbitrarily set harmonic component is obtained from an output of a current output circuit and only an arbitrarily set harmonic current component of a power supply line is suppressed.
果から、負荷に流れる電流の任意に設定した高調波成分
を各高調波成分毎に抽出する高調波成分抽出手段を設
け、任意の高調波成分について各高調波成分毎に出力す
る電流出力回路としたことを特徴とする請求項１又は請
求項２に記載のアクティブフィルタ装置の制御方法。3. Harmonic component extraction means for extracting, for each harmonic component, an arbitrarily set harmonic component of the current flowing through the load from the detection result of the load current detection unit for each phase is provided. The control method for the active filter device according to claim 1 or 2, wherein the harmonic output component is a current output circuit that outputs each harmonic component.
出する電圧源電流検出部と前記電流出力回路から各相毎
に出力する電流を検出する出力電流検出部を設け、前記
電圧源電流検出部の検出結果と出力電流検出部の検出結
果の差分を求める演算手段とを有し、前記演算手段の出
力を負荷電流検出部の検出結果としたことを特徴とする
請求項１乃至３に記載のアクティブフィルタ装置の制御
方法。4. A voltage source current detector for detecting a current output from an AC voltage source for each phase and an output current detector for detecting a current output for each phase from the current output circuit are provided. 4. A calculation means for obtaining a difference between a detection result of the current detection section and a detection result of the output current detection section, wherein the output of the calculation means is the detection result of the load current detection section. 5. A method for controlling the active filter device according to.
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|---|---|---|---|
| JP2001292688A JP4462794B2 (en) | 2001-09-26 | 2001-09-26 | Control method of active filter device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001292688A JP4462794B2 (en) | 2001-09-26 | 2001-09-26 | Control method of active filter device |
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|---|---|
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| JP4462794B2 JP4462794B2 (en) | 2010-05-12 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009071930A (en) * | 2007-09-11 | 2009-04-02 | Psc Kk | Current drive type actuator drive control unit |
| KR101010069B1 (en) | 2009-08-28 | 2011-01-24 | 엘에스산전 주식회사 | Active power filter for 3 poles 4 wires power system |
| CN102946103A (en) * | 2012-10-16 | 2013-02-27 | 西安奥特迅电力电子技术有限公司 | Active electric power filter device with self-testing function and testing method |
| CN103269072A (en) * | 2013-01-08 | 2013-08-28 | 安徽华正电气有限公司 | Circuit wave trapping device |
| CN103926915A (en) * | 2014-04-08 | 2014-07-16 | 国家电网公司 | Three-phase four-wire system APF control-panel debugging method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103427419B (en) * | 2013-08-22 | 2016-04-20 | 陈锡忠 | Active power filter selective harmonic compensation control method |
-
2001
- 2001-09-26 JP JP2001292688A patent/JP4462794B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009071930A (en) * | 2007-09-11 | 2009-04-02 | Psc Kk | Current drive type actuator drive control unit |
| KR101010069B1 (en) | 2009-08-28 | 2011-01-24 | 엘에스산전 주식회사 | Active power filter for 3 poles 4 wires power system |
| CN102946103A (en) * | 2012-10-16 | 2013-02-27 | 西安奥特迅电力电子技术有限公司 | Active electric power filter device with self-testing function and testing method |
| CN103269072A (en) * | 2013-01-08 | 2013-08-28 | 安徽华正电气有限公司 | Circuit wave trapping device |
| CN103926915A (en) * | 2014-04-08 | 2014-07-16 | 国家电网公司 | Three-phase four-wire system APF control-panel debugging method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4462794B2 (en) | 2010-05-12 |
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