JPH0884463A - Active filter with unbalanced voltage compensation - Google Patents
Active filter with unbalanced voltage compensationInfo
- Publication number
- JPH0884463A JPH0884463A JP21625294A JP21625294A JPH0884463A JP H0884463 A JPH0884463 A JP H0884463A JP 21625294 A JP21625294 A JP 21625294A JP 21625294 A JP21625294 A JP 21625294A JP H0884463 A JPH0884463 A JP H0884463A
- Authority
- JP
- Japan
- Prior art keywords
- inverter
- capacitor
- compensation
- unbalanced voltage
- harmonic current
- 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
Landscapes
- Power Conversion In General (AREA)
- Networks Using Active Elements (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は電力用アクティブフィル
タに関し、詳細には、不平衡電圧補償と高調波電流補償
を行う電力用アクティブフィルタの主回路構成法ないし
その直流コンデンサの接続法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an active power filter, and more particularly, to a method for constructing a main circuit of an active power filter for unbalance voltage compensation and harmonic current compensation or a method for connecting a DC capacitor thereof.
【０００２】[0002]
【従来の技術】電力用アクティブフィルタとして、不平
衡電圧補償用インバータと高調波電流補償用インバータ
の２台の独立したインバータで構成されたものがある
（例えば、電気学会技術報告II部第４２５号、２１頁、
４．１１図参照）。2. Description of the Related Art As an active filter for electric power, there is one that is composed of two independent inverters of an unbalanced voltage compensating inverter and a harmonic current compensating inverter. , Page 21,
(See Figure 4.11).
【０００３】２台のインバータのうち、不平衡電圧補償
インバータは上位系統の電圧不平衡及び電圧歪を補償
し、高調波電流補償インバータは負荷の高調波電流の補
償を行うものである。Of the two inverters, the unbalanced voltage compensating inverter compensates for voltage imbalance and voltage distortion in the upper system, and the harmonic current compensating inverter compensates the harmonic current of the load.
【０００４】図６に、その回路図を示す。図示の従来方
式では、不平衡電圧補償インバータ４と高調波電流補償
インバータ７はそれぞれに直流コンデンサ５，６が接続
された２台の独立したインバータで構成されており、両
方の直流コンデンサ５，６は電気的には絶縁されてい
る。それぞれのインバータ４，７では、交流電源１と直
流コンデンサ５，６との間でその補償電力に相当するエ
ネルギーの授受が行われる。このためコンデンサ電圧は
脈動する。このコンデンサ電圧脈動の許容値からコンデ
ンサ容量は求められる。FIG. 6 shows a circuit diagram thereof. In the illustrated conventional system, the unbalanced voltage compensating inverter 4 and the harmonic current compensating inverter 7 are composed of two independent inverters to which the DC capacitors 5 and 6 are connected, respectively. Is electrically isolated. In each of the inverters 4 and 7, energy corresponding to the compensation power is exchanged between the AC power supply 1 and the DC capacitors 5 and 6. Therefore, the capacitor voltage pulsates. The capacity of the capacitor can be obtained from the allowable value of this capacitor voltage pulsation.
【０００５】なお、図６において、２は変圧器、３，８
はスイッチングリップル制御用フィルタ、９は結合リア
クトル、１０，１１は電流検出回路、１２は線間電圧検
出回路、１３は不平衡電圧補償制御回路、１４は高調波
電流補償制御回路、１５は指令電流と実測電流との突き
合わせ回路、１６は高調波電流演算回路、１７は負荷で
ある。In FIG. 6, reference numeral 2 is a transformer, and 3, 8
Is a switching ripple control filter, 9 is a coupling reactor, 10 and 11 are current detection circuits, 12 is a line voltage detection circuit, 13 is an unbalanced voltage compensation control circuit, 14 is a harmonic current compensation control circuit, and 15 is a command current. Is a harmonic current calculation circuit, and 17 is a load.
【０００６】[0006]
【発明が解決しようとする課題】このように従来の方式
では、直流コンデンサはそれぞれのインバータに対して
独立して設けられており、各インバータの個別の機能を
果たすのみで、他のインバータの役目を補うようには働
いていなかった。As described above, according to the conventional method, the DC capacitor is provided independently for each inverter, and only the individual function of each inverter is fulfilled. Was not working to make up for.
【０００７】本発明が解決すべき課題は、一方のインバ
ータの直流コンデンサの利用の程度が低い場合には、他
方のインバータの直流コンデンサの容量が見掛け上大き
くなるような動作をする不平衡電圧補償付きアクティブ
フィルタを提供することにある。The problem to be solved by the present invention is unbalanced voltage compensation in which the capacity of the DC capacitor of the other inverter is apparently increased when the DC capacitor of the one inverter is used to a low degree. It is to provide an active filter with.
【０００８】[0008]
【課題を解決するための手段】前記課題を解決するた
め、本発明の不平衡電圧補償付きアクティブフィルタ
は、不平衡電圧補償用インバータモジュールと高調波電
流補償用インバータモジュールのそれぞれの直流コンデ
ンサを共有化したものである。In order to solve the above problems, an active filter with unbalanced voltage compensation according to the present invention shares a DC capacitor for each of the inverter module for unbalanced voltage compensation and the inverter module for harmonic current compensation. It has been transformed.
【０００９】[0009]
【作用】直流コンデンサは不平衡電圧補償用インバータ
と高調波電流補償用インバータに関して共有のエネルギ
ー蓄積要素として作用する。The DC capacitor acts as a shared energy storage element for the unbalanced voltage compensating inverter and the harmonic current compensating inverter.
【００１０】[0010]
【実施例】以下、本発明を図面に示す実施例を参照しな
がら具体的に説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the embodiments shown in the drawings.
【００１１】図１は本発明に係る不平衡電圧補償付きア
クティブフィルタの一実施例を示すもので、図中１は電
源、２は変圧器、３，８はスイッチングリップル制御用
フィルタ、４は不平衡電圧補償用インバータ、５は直流
コンデンサ、７は高調波電圧補償用インバータ、９は結
合リアクトル、１０，１１は電流検出回路、１２は線間
電圧検出回路、１３は不平衡電圧補償制御回路、１４は
高調波電流補償制御回路、１５は指令電流と実測電流と
の突き合わせ回路、１６は高調波電流演算回路、１７は
負荷である。FIG. 1 shows an embodiment of an active filter with unbalanced voltage compensation according to the present invention. In the figure, 1 is a power supply, 2 is a transformer, 3 and 8 are filters for controlling switching ripple, and 4 is an unfiltered filter. Inverter for balanced voltage compensation, 5 DC capacitor, 7 inverter for harmonic voltage compensation, 9 coupling reactor, 10 and 11 current detection circuit, 12 line voltage detection circuit, 13 unbalanced voltage compensation control circuit, Reference numeral 14 is a harmonic current compensation control circuit, 15 is a matching circuit between a command current and a measured current, 16 is a harmonic current calculation circuit, and 17 is a load.
【００１２】ここで、図１のコンデンサ５の容量を従来
方式である図６のコンデンサ５と６の容量の和に等しく
したとして説明する。Here, description will be made assuming that the capacitance of the capacitor 5 of FIG. 1 is made equal to the sum of the capacitances of the conventional capacitors 5 and 6 of FIG.
【００１３】図１の本発明実施例においては、直流コン
デンサを共通化することにより、両方のインバータの負
荷の合成が直流コンデンサに働くので、両インバータへ
の負荷のかかり具合の違いによる直流コンデンサの電圧
脈動値が従来方式より小さくなる。さらに、直流コンデ
ンサを１個にまとめたので、その寸法及び価格を下げる
ことが可能になる。In the embodiment of the present invention shown in FIG. 1, since the combination of the loads of both inverters works on the DC capacitor by using a common DC capacitor, the DC capacitor depending on the difference in the load applied to both inverters is used. The voltage ripple value becomes smaller than the conventional method. Furthermore, since the DC capacitors are integrated into one, it is possible to reduce the size and price.
【００１４】図１の不平衡電圧補償用インバータ４、直
流コンデンサ５、高調波電流補償用インバータ７は、図
２のように接続されている。図３，図４，図５は不平衡
電圧補償用インバータと高調波電流補償用インバータを
独立した装置とした作った場合における本発明の実施例
を示す。図３〜図５の実施例では、各インバータモジュ
ールの電源ラインを端子で接続したもので、図３では不
平衡電圧補償用インバータ４側に共通の直流コンデンサ
５を設け、図４では高調波電流補償用インバータ７側に
共通の直流コンデンサ６を設け、図５では、従来の不平
衡電圧補償用インバータ４の直流コンデンサ５と高調波
電流補償用インバータ７の直流コンデンサ６を端子で接
続して、電気的には並列接続された共通の直流コンデン
サとしたものである。The unbalanced voltage compensating inverter 4, the DC capacitor 5, and the harmonic current compensating inverter 7 shown in FIG. 1 are connected as shown in FIG. 3, 4, and 5 show an embodiment of the present invention in the case where the unbalanced voltage compensating inverter and the harmonic current compensating inverter are formed as independent devices. In the embodiments of FIGS. 3 to 5, the power supply lines of the respective inverter modules are connected by terminals. In FIG. 3, a common DC capacitor 5 is provided on the unbalanced voltage compensating inverter 4 side, and in FIG. A common DC capacitor 6 is provided on the compensating inverter 7 side, and in FIG. 5, the DC capacitor 5 of the conventional unbalanced voltage compensating inverter 4 and the DC capacitor 6 of the harmonic current compensating inverter 7 are connected at terminals. It is a common DC capacitor electrically connected in parallel.
【００１５】図１〜図４の実施例ではコンデンサは１個
にまとめたのに対し、図５の実施例では、コンデンサは
２個であるが、両インバータの共通のエネルギー蓄積要
素として機能する点においては、他の実施例と同様であ
る。In the embodiment shown in FIGS. 1 to 4, the number of capacitors is one, whereas in the embodiment shown in FIG. 5, there are two capacitors, but they function as a common energy storage element for both inverters. Is the same as in the other embodiments.
【００１６】[0016]
【発明の効果】本発明は、以上説明したように構成され
ているので、以下のような効果を奏する。Since the present invention is constructed as described above, it has the following effects.
【００１７】 不平衡電圧補償用インバータ及び高調
波電流補償用インバータの補償エネルギーを供給する直
流コンデンサを共有化することにより、両インバータへ
の負荷のかかり具合の違いによる直流コンデンサの電圧
脈動に及ぼす影響がより小さくなるので、不平衡電圧及
び高調波電流の補償が容易となる。By sharing the DC capacitor that supplies the compensation energy of the inverter for unbalanced voltage compensation and the inverter for harmonic current compensation, the influence on the voltage pulsation of the DC capacitor due to the difference in the load applied to both inverters Becomes smaller, it becomes easier to compensate the unbalanced voltage and the harmonic current.
【００１８】 直流コンデンサの個数を１個とした場
合、直流コンデンサ全体としての寸法が小さくなり、価
格も安価になる。When the number of DC capacitors is one, the size of the DC capacitor as a whole is small and the price is low.
【図１】 本発明の一実施例の構成を示す回路図であ
る。FIG. 1 is a circuit diagram showing a configuration of an exemplary embodiment of the present invention.
【図２】 本発明における直流コンデンサの接続例を示
す回路図である。FIG. 2 is a circuit diagram showing a connection example of a DC capacitor according to the present invention.
【図３】 本発明における直流コンデンサの接続例を示
す回路図である。FIG. 3 is a circuit diagram showing a connection example of a DC capacitor according to the present invention.
【図４】 本発明における直流コンデンサの接続例を示
す回路図である。FIG. 4 is a circuit diagram showing a connection example of a DC capacitor according to the present invention.
【図５】 本発明における直流コンデンサの接続例を示
す回路図である。FIG. 5 is a circuit diagram showing a connection example of a DC capacitor according to the present invention.
【図６】 従来の不平衡電圧補償と高調波電流補償を独
立して行う構成を示す回路図である。FIG. 6 is a circuit diagram showing a configuration in which conventional unbalanced voltage compensation and harmonic current compensation are independently performed.
１ 電源、２ 変圧器、３，８ スイッチングリップル
制御用フィルタ、４ 不平衡電圧補償用インバータ、５
直流コンデンサ、７ 高調波電圧補償用インバータ、
９ 結合リアクトル、１０，１１ 電流検出回路、１２
線間電圧検出回路、１３ 不平衡電圧補償制御回路、
１４ 高調波電流補償制御回路、１５ 指令電流と実測
電流との突き合わせ回路、１６ 高調波電流演算回路、
１７ 負荷1 power supply, 2 transformer, 3,8 switching ripple control filter, 4 unbalanced voltage compensation inverter, 5
DC capacitor, 7 harmonic voltage compensation inverter,
9 coupling reactor, 10 and 11 current detection circuit, 12
Line voltage detection circuit, 13 Unbalanced voltage compensation control circuit,
14 harmonic current compensation control circuit, 15 matching circuit of command current and measured current, 16 harmonic current calculation circuit,
17 load
───────────────────────────────────────────────────── フロントページの続き (71)出願人 000164438 九州電力株式会社 福岡県福岡市中央区渡辺通２丁目１番82号 (72)発明者 篠原 勝次 鹿児島県鹿児島市錦江台１丁目51番３−35 号 (72)発明者 山本 吉朗 鹿児島県鹿児島市唐湊３丁目31−１−45 (72)発明者 湯田 俊之 鹿児島県姶良郡隼人町真孝169−３ (72)発明者 小浜 博之 福岡県北九州市小倉北区白萩町３−26 九 電白萩寮内 (72)発明者 馬場 寛利 鹿児島県鹿児島市堀江町19−14−1105 ─────────────────────────────────────────────────── ─── Continued Front Page (71) Applicant 000164438 Kyushu Electric Power Co., Inc. 2-82 Watanabe-dori, Chuo-ku, Fukuoka-shi, Fukuoka (72) Inventor Katsuji Shinohara 1-51-3, Kinkodai, Kagoshima-shi, Kagoshima -35 (72) Inventor Yoshiro Yamamoto 3-31-1-45 Karaminato, Kagoshima City, Kagoshima Prefecture (72) Inventor Toshiyuki Yuda 169-3 Masataka Hayato-cho, Aira-gun, Kagoshima Prefecture Hiroyuki Obama Kitakyushu City, Fukuoka Prefecture 3-26 Shirahagi-cho, Kokurakita-ku Kyuden Shirahagi Dormitory (72) Inventor Hirotoshi Baba 19-14-1105 Horie-cho, Kagoshima-shi, Kagoshima
Claims (1)
と高調波電流補償用インバータモジュールのそれぞれの
直流コンデンサを共有化したことを特徴とする不平衡電
圧補償付きアクティブフィルタ。1. An active filter with unbalanced voltage compensation, wherein each DC capacitor of the inverter module for unbalanced voltage compensation and the inverter module for harmonic current compensation is shared.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21625294A JP3584063B2 (en) | 1994-09-09 | 1994-09-09 | Active filter with unbalanced voltage compensation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21625294A JP3584063B2 (en) | 1994-09-09 | 1994-09-09 | Active filter with unbalanced voltage compensation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0884463A true JPH0884463A (en) | 1996-03-26 |
| JP3584063B2 JP3584063B2 (en) | 2004-11-04 |
Family
ID=16685657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21625294A Expired - Fee Related JP3584063B2 (en) | 1994-09-09 | 1994-09-09 | Active filter with unbalanced voltage compensation |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3584063B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100683430B1 (en) * | 2004-12-07 | 2007-02-20 | 한국철도기술연구원 | System for Compensating Power Quality of Feeding equipment of Electric Railway |
-
1994
- 1994-09-09 JP JP21625294A patent/JP3584063B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100683430B1 (en) * | 2004-12-07 | 2007-02-20 | 한국철도기술연구원 | System for Compensating Power Quality of Feeding equipment of Electric Railway |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3584063B2 (en) | 2004-11-04 |
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