JPH0884476A - Multiplex rectifier - Google Patents
Multiplex rectifierInfo
- Publication number
- JPH0884476A JPH0884476A JP6215778A JP21577894A JPH0884476A JP H0884476 A JPH0884476 A JP H0884476A JP 6215778 A JP6215778 A JP 6215778A JP 21577894 A JP21577894 A JP 21577894A JP H0884476 A JPH0884476 A JP H0884476A
- Authority
- JP
- Japan
- Prior art keywords
- current
- harmonic
- active filter
- rectifier
- converter
- 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
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- Rectifiers (AREA)
- Power Conversion In General (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、無停電電源装置用イン
バータやＶＶＶＦインバータなど大容量のインバータ装
置の順変換直流電源部の入力電流に、高調波の無い正弦
波状の電流を供給し得る電力変換器の構成法に関するも
のである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric power capable of supplying a sinusoidal current having no harmonic to the input current of a forward conversion DC power supply unit of a large capacity inverter device such as an inverter for an uninterruptible power supply or a VVVF inverter. The present invention relates to a converter configuration method.
【０００２】[0002]
【従来の技術】近年の半導体応用の変換装置の普及に伴
い、これらの装置から発生する高調波電流による系統に
併設される他の機器に及ぼす高調波の影響が増加してき
た。特に、コンピュータや計装用などの瞬時の停電も許
されないＵＰＳ（無停電電源装置）やボンプ駆動用など
大容量の負荷装置では、その順変換部の直流流電源に流
入する電流の高調波分の絶対値も大きい。2. Description of the Related Art With the recent widespread use of semiconductor-applied converters, the influence of harmonics on other devices installed in the system due to the harmonic currents generated by these devices has increased. In particular, in a UPS (uninterruptible power supply) that does not allow an instantaneous power failure such as for a computer or instrumentation, or a large-capacity load device such as a drive for a pump, the harmonic components of the current flowing into the direct current power supply of the forward conversion unit are included. The absolute value is also large.
【０００３】これら、大容量の装置の順変換部には、一
般に高調波電流成分の少ない１２ステップの多重変圧器
を用いた方式が採用されている。しかし、この方式じは
５次及び７次の低次の高調波電流成分は打ち消される
が、１１次、１３次及びその高次の高調波は残るので、
電源側の電流には１０％程度の高調波電流成分が含まれ
ている。In the forward converter of these large capacity devices, a system using a 12-step multiple transformer with a small harmonic current component is generally adopted. However, this method cancels the 5th and 7th low order harmonic current components, but leaves the 11th, 13th and higher harmonics, so that
The current on the power supply side contains a harmonic current component of about 10%.
【０００４】図３は、この種１２ステップの多重変圧器
を用いた方式に、その高調波電流を抑制するアクティブ
フィルタを適用した場合のシステム構成を示す。１は系
統電源、２は系統のインピーダンス、５１及び５２はダ
イオード整流器からなる２台の順変換器６３及び６４の
入力電流の位相をずらして多重化するための二次巻線が
星形及び三角結線からなる変圧器、６１及び６２は前記
整流器の入力電流のピーク電流を抑制する交流リアクト
ル、６５及び６６は整流器の出力電圧を平滑化するため
のコンデンサ、６７はこの順変換器の負荷となるインバ
ータなどを表した負荷抵抗である。変圧器５１と、リア
クトル６１から負荷抵抗６７までの一点鎖線で囲んだ部
分６０とが、高調波を発生する補償対象の負荷である。FIG. 3 shows a system configuration in the case where an active filter for suppressing the harmonic current is applied to a system using such a 12-step multiplex transformer. 1 is the system power supply, 2 is the system impedance, 51 and 52 are the star-shaped and triangular secondary windings for shifting the phase of the input currents of the two forward converters 63 and 64, which are diode rectifiers, for phase shifting and multiplexing. Connected transformers, 61 and 62 are AC reactors for suppressing the peak current of the input current of the rectifier, 65 and 66 are capacitors for smoothing the output voltage of the rectifier, and 67 is a load of the forward converter. It is a load resistance that represents an inverter. The transformer 51 and the portion 60 surrounded by the alternate long and short dash line from the reactor 61 to the load resistance 67 are the loads to be compensated for generating harmonics.
【０００５】一般にアクティブフィルタ装置８０は、高
調波電流が流れる負荷６０と並列に接続して電流検出器
４１で検出した電流より、その高調波電流と逆位相の電
流を発生して電源系統に注入し高調波電流を抑制する
が、整流器６３及び６４の直流側に直流リアクトルを適
用しコンデンサ６５及び６６を有しない電流形の順変換
器に対しては非常に有効であるけれども、上記コンデン
サ入力形ダイオード整流器に対して適用する場合には、
アクティブフィルタの注入点の電源側の電流はある程度
改善されるが、補償する注入電流の一部が高調波に対す
るインピーダンスの低い整流器側に流れてその効果を低
減したり、アクティブフィルタを接続することによって
系統側のインピーダンスが除去され、却って整流器負荷
のピーク電流が大きくなるなどの問題があった。この場
合、交流リアクトル６１及び６２のインピーダンスをあ
る程度大きくしておけばその影響は少なくなるが、その
電圧降下も大きくなり、出力が低下するなどの問題もあ
った。In general, the active filter device 80 is connected in parallel with a load 60 through which a harmonic current flows and generates a current having a phase opposite to that of the harmonic current from the current detected by the current detector 41 and injects it into the power supply system. Although it suppresses the harmonic current, it is very effective for a current type forward converter in which a DC reactor is applied to the DC side of the rectifiers 63 and 64 and the capacitors 65 and 66 are not provided. When applied to a diode rectifier,
Although the current on the power supply side at the injection point of the active filter is improved to some extent, part of the injection current to be compensated flows to the rectifier side, which has a low impedance for harmonics, to reduce its effect, or by connecting an active filter. There is a problem that the impedance on the system side is removed and the peak current of the rectifier load becomes large on the contrary. In this case, if the impedance of the AC reactors 61 and 62 is increased to some extent, the effect is reduced, but the voltage drop is increased and the output is decreased.
【０００６】図４は、順変換器部の整流器と逆並列に高
速スイッチング素子のＩＧＢＴ（絶縁ゲートバイポーラ
トランジスタ）を適用して、ＰＷＭ（パルス幅変調）制
御によりその入力電流を制御装置７３及び７４により正
弦波状に制御するＰＷＭ変換器７１及び７２を採用した
他の従来例を示す。制御装置７３及び７４により制御さ
れるＰＷＭ変換器７１及び７２と、電流検出器４２及び
４３と、直流コンデンサ６５及び６６、及び抵抗負荷６
７とで、一点鎖線で示されるＰＷＭコンバータ７０を構
成している。その他、図３と同じ符号は、同じ機能の構
成要素である。In FIG. 4, an IGBT (insulated gate bipolar transistor), which is a high-speed switching element, is applied in antiparallel with the rectifier of the forward converter section, and its input current is controlled by PWM (pulse width modulation) control devices 73 and 74. Another conventional example adopting the PWM converters 71 and 72 that are controlled in a sinusoidal manner by means of FIG. PWM converters 71 and 72 controlled by control devices 73 and 74, current detectors 42 and 43, DC capacitors 65 and 66, and resistive load 6
7 and 7 form a PWM converter 70 indicated by a chain line. In addition, the same reference numerals as those in FIG. 3 are components having the same functions.
【０００７】この方式では、負荷に供給する大電力を直
流に変換する際に、ＰＷＭ制御により変換器入力電流を
高速スイッチングにより電力変換を行っているので、Ｐ
ＷＭ変換器７１及び７２を構成するスイッチング素子の
ＩＧＢＴやコンデンサなどに高調波特性の優れた構成部
品を適用したり、制御回路７４と呼び７５を構成する電
子部品に高速演算制御のできるＤＳＰ（ディジタルシグ
ナルプロセッサ）などを適用する必要があり、また図示
してない高速ダイオードを用いたスナバ回路を追加する
必要があるなど、高価なものとなっている。In this method, when converting a large amount of power supplied to the load into a direct current, the converter input current is converted into power by high-speed switching by PWM control.
A DSP (high-speed arithmetic control) can be applied to an electronic component that forms a control circuit 74 and a call 75 by applying a component having excellent harmonic characteristics to an IGBT or a capacitor of a switching element that configures the WM converters 71 and 72. It is expensive because it is necessary to apply a digital signal processor) or the like and to add a snubber circuit using a high speed diode (not shown).
【０００８】[0008]
【発明が解決しようとする課題】本発明は、上述したよ
うな点に鑑みてなされたもので、その目的とするところ
は、アクティブフィルタを接続することによって順変換
器側のピーク電流が増えるなどの影響がなく、また順変
換器側の大電力をＰＷＭ制御するのではなく、安価なダ
イオード整流器を用いたままで、抑制すべき１０％程度
の比較的小さい電力を高速制御することにより、高調波
電流のほとんど発生しない電力変換器のシステムを提供
するものである。SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and an object thereof is to increase the peak current on the forward converter side by connecting an active filter. Of the harmonics by controlling the relatively small electric power of about 10% that should be suppressed at high speed without using the PWM control of the large electric power of the forward converter side and using the inexpensive diode rectifier. The present invention provides a power converter system that generates almost no current.
【０００９】[0009]
【課題を解決するための手段】本発明は、順変換器の変
換器部に安価で従来から一般に使用されているコンデン
サ入力形のダイオード整流器を適用し、該ダイオード整
流器の負荷容量の１／１０以下の容量のアクティブフィ
ルタを適用して、上記変換器の交流入力側の電流を正弦
波化して、高調波の少ない電力変換器を提供するもので
ある。According to the present invention, an inexpensive and generally used capacitor input type diode rectifier is applied to the converter portion of a forward converter, and 1/10 of the load capacity of the diode rectifier is applied. An active filter having the following capacitance is applied to convert the current on the AC input side of the converter into a sine wave to provide a power converter with few harmonics.
【００１０】[0010]
【実施例】以下、本発明の実施例を図面に基づいて詳細
に説明する。その作用はこの実施例により説明する。図
１は、本発明のアクティブフィルタが適用された電力変
換器のシステム構成を示す。１は系統電源、２は系統イ
ンピーダンス、６０は２台のダイオード整流器からなる
１２ステップのコンデンサ入力形の整流装置であって、
５１及び５２は２台の整流器を多重化するために二次巻
線が星形及び三角結線を有する２台の変圧器の一次巻線
を並列に接続した変圧器で、図３の従来のシステム構成
とは各変圧器の二次側に直列に挿入されていた交流リア
クトル６１及び６２が省略されている以外は同じ構成と
なっている。Embodiments of the present invention will now be described in detail with reference to the drawings. The operation will be described with reference to this embodiment. FIG. 1 shows a system configuration of a power converter to which an active filter of the present invention is applied. 1 is a system power supply, 2 is a system impedance, and 60 is a 12-step capacitor input type rectifier consisting of two diode rectifiers,
Reference numerals 51 and 52 denote transformers in which primary windings of two transformers having secondary windings having a star shape and a triangular connection are connected in parallel in order to multiplex two rectifiers. The configuration is the same as that of the transformer except that the AC reactors 61 and 62 inserted in series on the secondary side of each transformer are omitted.
【００１１】３はアクティブフィルタの補償電流を系統
に直列に注入するための変流器であって、アクティブフ
ィルタ装置８０はこの変流器３の二次側に接続する。Reference numeral 3 denotes a current transformer for injecting the compensation current of the active filter in series to the system, and the active filter device 80 is connected to the secondary side of the current transformer 3.
【００１２】図２は、本発明の他の実施例を示すシステ
ム構成図である。変圧器５３は一次巻線が２巻線であっ
て直列に接続されている以外は、図１のシステム構成と
全く同じである。FIG. 2 is a system configuration diagram showing another embodiment of the present invention. The transformer 53 has exactly the same system configuration as that of FIG. 1 except that the primary winding has two windings and is connected in series.
【００１３】[0013]
【作用】図１と図２のアクティブフィルタ装置８０はい
ずれも、高調波電流を打ち消す高調波電圧を発生するＰ
ＷＭ変換器８１とその制御回路８２とで構成し、変圧器
５１及び５２の一次側で電流検出器４１で前記整流装置
の多重後の入力電流を検出して、検出した電源電流ｉL
より制御回路８２にてその高調波を演算検出し、変換器
８１がその検出した高調波電流を打ち消す高調波電圧Ｖ
C を発生する。In both of the active filter devices 80 shown in FIGS. 1 and 2, P that generates a harmonic voltage that cancels the harmonic current is generated.
The WM converter 81 and its control circuit 82 are provided. The primary side of the transformers 51 and 52 uses the current detector 41 to detect the input current after the rectifying device is multiplexed, and the detected power supply current i L
The control circuit 82 calculates and detects the higher harmonic, and the converter 81 cancels the detected higher harmonic current.
Generates C.
【００１４】[0014]
【発明の効果】図５及び図６は、本発明による動作や効
果を示すための各部の電圧、電流波形のシミュレーショ
ンの結果を示す。いずれも、上段より、電源電圧ＶS 、
電源電流ｉS 、整流器６３及び６４に流入する負荷電流
ｉL1及びｉL2、コンデンサ６５又は６６の電圧ＶO 及び
アクティブフィルタ６０の出力電圧ＶC を示している。
図中、時間軸が３０ｍＳまでのＡ．Ｆ．：ＯＮの波形は
アクティブフィルタを動作指せた場合の各部の動作波形
であり、３０ｍＳ以上のＡ．Ｆ．：ＯＦＦの波形はアク
ティブフィルタを停止させた場合の動作波形を示す。FIG. 5 and FIG. 6 show results of simulation of voltage and current waveforms of respective parts for showing the operation and effects according to the present invention. In both cases, the power supply voltage V S ,
The power supply current i S , the load currents i L1 and i L2 flowing into the rectifiers 63 and 64, the voltage V O of the capacitor 65 or 66, and the output voltage V C of the active filter 60 are shown.
In the figure, A. F. : The ON waveform is an operation waveform of each part when the active filter is operated, and the waveform of A.S. F. The: OFF waveform shows the operation waveform when the active filter is stopped.
【００１５】図５は、図１の実施例の並列多重方式にお
ける効果を示したもので、各整流器の入力側に流入する
負荷電流ｉL1及びｉL2は、整流器がコンデンサ入力形で
あるため、正負の１２０度間に２回山ができる、高調波
の多量に含まれる電流波形となる。この電流波形には、
５次及び７次の大きい高調波電流も含まれていけれど
も、電源電流ｉS には、多重効果よりこれらの成分は打
ち消されて、１サイクルに１２回脈動している１１次及
び１３次成分の高調波電流が流れている。アクティブフ
ィルタを動作させた場合には、アクティブフィルタ６０
の出力電圧ＶC は図示のように、同様に１サイクルに１
２回脈動した電圧波形となって、電源電流ｉS は高調波
のほとんどない正弦波状の電流波形に改善されている。FIG. 5 shows the effect of the parallel multiplexing system of the embodiment shown in FIG. 1. The load currents i L1 and i L2 flowing into the input side of each rectifier are of the capacitor input type, The current waveform includes a large amount of higher harmonics, which has two peaks between positive and negative 120 degrees. This current waveform has
Although the 5th and 7th large harmonic currents are also included, the power supply current i S cancels these components due to the multiple effect, and the 11th and 13th order components pulsating 12 times in one cycle. Harmonic current is flowing. When the active filter is operated, the active filter 60
The output voltage V C of the
The voltage waveform pulsates twice, and the power supply current i S is improved to a sinusoidal current waveform with almost no harmonics.
【００１６】図６は、図２の実施例の直列多重方式にお
ける効果を示したもので、この場合には、変圧器の一次
巻線にて結合し一次側が直列接続となっているので、一
次側でアクティブフィルタにて高調波を抑制すれば、二
次側の各変換器の電流波形も高調波のない正弦波状の電
流波形となり、ダイオード整流器に流れるピーク電流も
低減される。いずれの場合についても、アクティブフィ
ルタにて抑制する高調波電流は１１次、１３次とその高
次の高調波電流となるので、装置容量は補償対象負荷容
量の１／１０程度の比較的小さい容量となる。FIG. 6 shows the effect of the embodiment of FIG. 2 in the series multiplex system. In this case, since the primary windings of the transformer are coupled and the primary side is connected in series, the primary winding is connected. If harmonics are suppressed by the active filter on the side, the current waveform of each converter on the secondary side also becomes a sinusoidal current waveform without harmonics, and the peak current flowing through the diode rectifier is also reduced. In either case, since the harmonic currents suppressed by the active filter are the 11th, 13th and higher harmonic currents, the device capacity is a relatively small capacity of about 1/10 of the load capacity to be compensated. Becomes
【００１７】以上説明したように、本発明によれば、並
列多重及び直列多重方式のコンデンサ入力形の整流器負
荷のいずれに対しても、アクティブフィルタをこれらに
直列に構成させることにより、系統に流出する高調波電
流を直接抑制するよう制御するので、従来のアクティブ
フィルタを並列に適用した時に問題となった注入電流が
整流器側に分流して高調波抑制効果を損なったり、整流
器側の入力電流のピーク電流を増大させることなく、良
好な高調波抑制効果を得ることができる。As described above, according to the present invention, for both parallel-multiplexing and series-multiplexing type capacitor input type rectifier loads, an active filter is connected in series to the load, and the current flows to the system. Since the harmonic current is controlled to be directly suppressed, the injected current, which is a problem when the conventional active filter is applied in parallel, is shunted to the rectifier side, impairing the harmonic suppression effect, or the input current of the rectifier side. A good harmonic suppression effect can be obtained without increasing the peak current.
【図１】本発明による並列多重形の１２ステップのコン
デンサ入力形負荷と直列アクティブフィルタとを組み合
わせた多重化整流装置の一実施例の構成図である。FIG. 1 is a configuration diagram of an embodiment of a multiplex rectifying device in which a parallel multiplex type 12-step capacitor input type load and a series active filter according to the present invention are combined.
【図２】本発明による直列多重形の１２ステップのコン
デンサ入力形負荷と直列アクティブフィルタとを組み合
わせた多重化整流装置の他の実施例の構成図である。FIG. 2 is a configuration diagram of another embodiment of the multiplex rectifying device in which the serial multiplex type 12-step capacitor input type load and the serial active filter according to the present invention are combined.
【図３】アクティブフィルタをコンデンサ入力形負荷に
並列に構成した従来における多重化整流装置の構成図を
示す。FIG. 3 is a block diagram of a conventional multiplex rectifier in which an active filter is configured in parallel with a capacitor input type load.
【図４】アクティブフィルタを用いないで等価な多重化
整流装置を構成する他の従来例を示す構成図である。FIG. 4 is a configuration diagram showing another conventional example that configures an equivalent multiplex rectifier without using an active filter.
【図５】図１の多重変圧器の一次巻線を並列に接続した
並列多重化方式の負荷に適用した場合の、本発明による
動作や効果を示すシステム各部の電圧、電流波形を示す
グラフである。5 is a graph showing voltage and current waveforms of various parts of the system showing the operation and effects of the present invention when applied to a load of a parallel multiplexing system in which the primary windings of the multiple transformer of FIG. 1 are connected in parallel. is there.
【図６】図２の多重変圧器の一次巻線を直列に接続した
直列多重化方式の負荷に適用した場合の、本発明による
動作や効果を示すシステム各部の電圧、電流波形を示す
グラフである。6 is a graph showing voltage and current waveforms of various parts of the system showing the operation and effects according to the present invention when applied to a load of a series multiplexing system in which the primary windings of the multiple transformer of FIG. 2 are connected in series. is there.
１ 系統電源 ２ 系統インピーダンス ３ 変流器 ４１〜４３ 電流検出器 ５１，５２ 多重変圧器 ６０ １２ステップコンデンサ入力形整流装置 ６１，６１ 交流リアクトル ６３，６４ ダイオード整流器 ６５，６６ 直流コンデンサ ６７ 負荷抵抗 ７０ ＰＷＭコンバータ ７１，７２ ＰＷＭ変換器 ７３，７４ 制御装置 ８０ アクティブフィルタ装置 ８１ ＰＷＭ変換器 ８２ 制御装置 1 system power supply 2 system impedance 3 current transformer 41-43 current detector 51,52 multiple transformer 60 12 step capacitor input type rectifier 61,61 AC reactor 63,64 diode rectifier 65,66 DC capacitor 67 load resistance 70 PWM Converter 71,72 PWM converter 73,74 Control device 80 Active filter device 81 PWM converter 82 Control device
Claims (1)
の相差角を変え、それぞれの巻線出力をダイオード整流
器で整流して、その出力電圧を重畳してなる多重化整流
装置において、 変圧器の電源側に直列に前記整流器の高調波電流を補償
するアクティブフィルタを設置することを特徴とする多
重化整流装置。1. A multiplex rectification device in which a phase difference angle of a polyphase alternating current is changed by using transformers different in connection method, each winding output is rectified by a diode rectifier, and the output voltage is superimposed, A multiplex rectification device, wherein an active filter for compensating the harmonic current of the rectifier is installed in series on the power supply side of the transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21577894A JP3226077B2 (en) | 1994-09-09 | 1994-09-09 | Multiplexed rectifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21577894A JP3226077B2 (en) | 1994-09-09 | 1994-09-09 | Multiplexed rectifier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0884476A true JPH0884476A (en) | 1996-03-26 |
| JP3226077B2 JP3226077B2 (en) | 2001-11-05 |
Family
ID=16678079
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21577894A Expired - Fee Related JP3226077B2 (en) | 1994-09-09 | 1994-09-09 | Multiplexed rectifier |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3226077B2 (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030003606A (en) * | 2001-07-03 | 2003-01-10 | 학교법인 포항공과대학교 | Hybrid PWM AC/DC converter having active power filter function in the power system |
| JP2005287125A (en) * | 2004-03-29 | 2005-10-13 | Nissin Electric Co Ltd | Uninterruptible power supply apparatus and power interruption compensating system |
| JP2008278714A (en) * | 2007-05-07 | 2008-11-13 | Fuji Electric Systems Co Ltd | Rectifier circuit |
| JP2008278715A (en) * | 2007-05-07 | 2008-11-13 | Fuji Electric Systems Co Ltd | Parallel 18-pulse rectifier circuit |
| JP2008295155A (en) * | 2007-05-23 | 2008-12-04 | Shinko Electric Co Ltd | Twelve-phase rectifier circuit |
| WO2009060619A1 (en) * | 2007-11-09 | 2009-05-14 | Ntt Data Ex Techno Corporation | Power supply providing system |
| JP2010136458A (en) * | 2007-11-09 | 2010-06-17 | Ntt Data Intellilink Corp | Power supply system |
| CN102684513A (en) * | 2011-03-16 | 2012-09-19 | 力博特公司 | Uninterruptible power supply and rectifying circuit of uninterruptible power supply |
| JP2015033218A (en) * | 2013-08-02 | 2015-02-16 | 川崎重工業株式会社 | Control device for power conversion apparatus, and control method |
| WO2019109781A1 (en) * | 2017-12-07 | 2019-06-13 | 上海交通大学 | Hybrid dc converter for offshore wind farm |
-
1994
- 1994-09-09 JP JP21577894A patent/JP3226077B2/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030003606A (en) * | 2001-07-03 | 2003-01-10 | 학교법인 포항공과대학교 | Hybrid PWM AC/DC converter having active power filter function in the power system |
| JP2005287125A (en) * | 2004-03-29 | 2005-10-13 | Nissin Electric Co Ltd | Uninterruptible power supply apparatus and power interruption compensating system |
| JP2008278714A (en) * | 2007-05-07 | 2008-11-13 | Fuji Electric Systems Co Ltd | Rectifier circuit |
| JP2008278715A (en) * | 2007-05-07 | 2008-11-13 | Fuji Electric Systems Co Ltd | Parallel 18-pulse rectifier circuit |
| JP2008295155A (en) * | 2007-05-23 | 2008-12-04 | Shinko Electric Co Ltd | Twelve-phase rectifier circuit |
| WO2009060619A1 (en) * | 2007-11-09 | 2009-05-14 | Ntt Data Ex Techno Corporation | Power supply providing system |
| JP2010136458A (en) * | 2007-11-09 | 2010-06-17 | Ntt Data Intellilink Corp | Power supply system |
| CN102684513A (en) * | 2011-03-16 | 2012-09-19 | 力博特公司 | Uninterruptible power supply and rectifying circuit of uninterruptible power supply |
| JP2015033218A (en) * | 2013-08-02 | 2015-02-16 | 川崎重工業株式会社 | Control device for power conversion apparatus, and control method |
| WO2019109781A1 (en) * | 2017-12-07 | 2019-06-13 | 上海交通大学 | Hybrid dc converter for offshore wind farm |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3226077B2 (en) | 2001-11-05 |
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