JPH0679260B2 - Reactive power compensator - Google Patents
Reactive power compensatorInfo
- Publication number
- JPH0679260B2 JPH0679260B2 JP59172285A JP17228584A JPH0679260B2 JP H0679260 B2 JPH0679260 B2 JP H0679260B2 JP 59172285 A JP59172285 A JP 59172285A JP 17228584 A JP17228584 A JP 17228584A JP H0679260 B2 JPH0679260 B2 JP H0679260B2
- Authority
- JP
- Japan
- Prior art keywords
- phase
- reactive power
- terminal
- power compensator
- semiconductor switch
- 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.)
- Expired - Lifetime
Links
- 239000003990 capacitor Substances 0.000 claims description 20
- 239000004065 semiconductor Substances 0.000 claims description 20
- 238000004804 winding Methods 0.000 claims description 11
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/70—Regulating power factor; Regulating reactive current or power
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Control Of Electrical Variables (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は溶接機などの間欠、不規則変動負荷の無効電力
補償装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reactive power compensator for an intermittent or irregular fluctuating load such as a welding machine.
従来の技術 従来の無効電力補償装置を第２図により説明する。2. Description of the Related Art A conventional reactive power compensator will be described with reference to FIG.
単相コンデンサ1a、1b、1cと直列リアクトル2a、2b、2c
と半導体スイッチ3a、3b、3cを各々直列接続し、それら
を同一電源ラインに並列接続されている。このように３
群の単相コンデンサ容量比は1a:1b:1c＝1:2:4とし、投
入制御部４にて投入群を切換えて、その組合わせにより
７段階の容量が得られるように構成されている。Single-phase capacitors 1a, 1b, 1c and series reactors 2a, 2b, 2c
And semiconductor switches 3a, 3b, 3c are connected in series, and they are connected in parallel to the same power supply line. Like this 3
The capacity ratio of the single-phase capacitors of the groups is set to 1a: 1b: 1c = 1: 2: 4, and the closing control unit 4 switches the closing groups to obtain a capacity of 7 stages by combining them. .
発明が解決しようとする問題点 このような装置において、単相の各装置が３種類必要と
なる。特に直列リアクトルにおいて、単相用が３台必要
としていたため、高価でスペースを多く要していた。Problems to be Solved by the Invention In such a device, three types of single-phase devices are required. In particular, the series reactor required three units for single phase, and was expensive and required a lot of space.
また容量の小さい方が投入頻度が多く、熱的に余裕のあ
る設計を必要として大形の直列リアクトルとなり不経済
であった。In addition, the smaller the capacity, the more frequently it is input, and the large-sized series reactor is uneconomical because it requires a design with a thermal margin.
問題点を解決するための手段 本発明はこのような欠点を除去するため、各段の３台の
単相直列リアクトルの代わりに少なくとも２つの中間タ
ップを有する１台のタップ付単相直列リアクトルを用い
て構成したものであり、直列リアクトル２と半導体スイ
ッチ3a、3b、3cと、単相コンデンサ1a、1b、1cと制御部
４とを有し、回路の入力端子５、６が交流電源に接続さ
れてなる無効電力補償装置であって、直列リアクトル２
は、巻き始め端21、中間タップ22、23および巻き終り端
24の各端子を有し、巻き終り端の端子24が半導体スイッ
チ3aと単相コンデンサ1aとを、中間タップの端子23が半
導体スイッチ3bと単相コンデンサ1bとを、中間タップの
端子22が半導体スイッチ3cと単相コンデンサ1bとを、そ
れぞれ直列接続し、単相コンデンサ1a、1b、1cの各他端
が入力端子６に接続され、 制御部４は、半導体スイッチ3a、3b、3cの各ゲートを制
御する無効電力補償装置。Means for Solving the Problems In order to eliminate such drawbacks, the present invention replaces the three single-phase series reactors in each stage with one tapped single-phase series reactor having at least two intermediate taps. It has a series reactor 2, semiconductor switches 3a, 3b, 3c, single-phase capacitors 1a, 1b, 1c, and a control unit 4, and the input terminals 5 and 6 of the circuit are connected to an AC power supply. And a series reactor 2
Is the winding start end 21, the intermediate taps 22 and 23, and the winding end end.
The terminal 24 at the end of winding has the semiconductor switch 3a and the single-phase capacitor 1a, the intermediate tap terminal 23 is the semiconductor switch 3b and the single-phase capacitor 1b, and the intermediate tap terminal 22 is the semiconductor. The switch 3c and the single-phase capacitor 1b are connected in series, and the other ends of the single-phase capacitors 1a, 1b, 1c are connected to the input terminal 6, and the control unit 4 controls the gates of the semiconductor switches 3a, 3b, 3c. Reactive power compensator for controlling.
である。Is.
実施例 次に本発明の一実施例を第１図により説明する。Embodiment Next, an embodiment of the present invention will be described with reference to FIG.
第１図の実施例である無効電力補償装置は、直列リアク
トル２と、半導体スイッチ3a、3b、3cと、単相コンデン
サ1a、1b、1cと制御部４とを有し、回路の入力端子５、
６が交流電源に接続されて構成される。The reactive power compensator according to the embodiment of FIG. 1 has a series reactor 2, semiconductor switches 3a, 3b, 3c, single-phase capacitors 1a, 1b, 1c, and a control unit 4, and an input terminal 5 of the circuit. ,
6 is connected to an AC power supply.
直列リアクトル２は、巻き始め端21、中間タップ22、23
および巻き終り端24の各端子を有し、巻き終り端の端子
24が半導体スイッチ3a、単相コンデンサ1aとを、中間タ
ップの端子23が半導体スイッチ3bと単相コンデンサ1bと
を、中間タップの端子22が半導体スイッチ3cと単相コン
デンサ1cとを、それぞれ直列接続し、単相コンデンサ1
a、1b、1cの各他端が入力端子６に接続され、制御部４
によって、半導体スイッチ3a、3b、3cの各ゲートを制御
できるように回路構成したものである。The series reactor 2 has a winding start end 21, intermediate taps 22 and 23.
And each terminal of the winding end 24, the terminal of the winding end
24 is the semiconductor switch 3a, the single-phase capacitor 1a, the intermediate tap terminal 23 is the semiconductor switch 3b and the single-phase capacitor 1b, the intermediate tap terminal 22 is the semiconductor switch 3c and the single-phase capacitor 1c are connected in series. And single-phase capacitor 1
The other ends of a, 1b, and 1c are connected to the input terminal 6, and the control unit 4
The semiconductor switches 3a, 3b, and 3c are configured to control the gates of the semiconductor switches 3a, 3b, and 3c.
単相コンデンサ1a、1b、1cの容量比は、 1a:1b:1c＝1:2:4 で構成され、これに対して直列リアクトル２の各中間タ
ップのリアクタンスおよび巻数比は、 1a用:1b用:1c用＝4:2:1 となり、コンデンサ容量の小さい1a用の直列リアクトル
２は最多巻数とし、巻終りに接続される。The capacitance ratio of the single-phase capacitors 1a, 1b, 1c is 1a: 1b: 1c = 1: 2: 4, while the reactance and turn ratio of each intermediate tap of the series reactor 2 are for 1a: 1b. For: 1c = 4: 2: 1, and the series reactor 2 for 1a with a small capacitor capacity has the largest number of turns and is connected at the end of the turn.
また、コンデンサ容量の一番大きい1c用の直列リアクト
ル２は最小巻数の中間タップに接続される。The series reactor 2 for 1c, which has the largest capacitance, is connected to the center tap with the minimum number of turns.
動作は制御部４の投入、引外し信号により、半導体スイ
ッチ3a、3b、3cを制御し、７段階の容量組み合わせを行
い、負荷の無効電力に適当な進相無効電力を供給する。In operation, the semiconductor switches 3a, 3b and 3c are controlled by the closing / triggering signals of the control unit 4 to perform the 7-stage capacity combination and supply an appropriate advanced reactive power to the reactive power of the load.
なお、第２図の実施例において、半導体スイッチとして
トライアックの例を示したが、他に逆並列サイリスタや
一般の開閉器でも適用可能である。In the embodiment of FIG. 2, an example of a triac is shown as a semiconductor switch, but an antiparallel thyristor or a general switch may be applied.
また、中間タップが２個の直列リアクトルの例を示した
が、他の異なる中間タップの数でも同様に適用可能であ
る。Also, an example of a series reactor having two intermediate taps is shown, but the same can be applied to other numbers of different intermediate taps.
発明の効果 上述のごとく、単相直列リアクトル３台の代わりに中間
タップ付単相直列リアクトルを用いることにより、直列
リアクトルは小型で安価に製作でき、かつ容量の小さい
段の直列リアクトルには十分な熱量が得られるため、無
効電力補償装置としては極めて経済的な装置である。EFFECTS OF THE INVENTION As described above, by using the single-phase series reactor with an intermediate tap instead of the three single-phase series reactors, the series reactor is small and inexpensive to manufacture, and is sufficient for a series reactor with a small capacity stage. Since the amount of heat is obtained, it is an extremely economical device as a reactive power compensator.
第１図は本発明の無効電力補償装置の一実施例の回路説
明図、第２図は従来の無効電力補償装置の回路説明図で
ある。 1a、1b、1c:単相コンデンサ 2:直列リアクトル 21:巻き始め端 22、23:中間タップ 24:巻き終り端 3a、3b、3c:半導体スイッチ 4:制御部 ５、6:入力端子FIG. 1 is a circuit diagram of an embodiment of a reactive power compensator of the present invention, and FIG. 2 is a circuit diagram of a conventional reactive power compensator. 1a, 1b, 1c: Single-phase capacitor 2: Series reactor 21: Winding start end 22, 23: Intermediate tap 24: Winding end end 3a, 3b, 3c: Semiconductor switch 4: Control section 5, 6: Input terminal
Claims (1)
（3a、3b、3c）と、単相コンデンサ（1a、1b、1c）と制
御部（４）とを有し、回路の入力端子（５、６）が交流
電源に接続されてなる無効電力補償装置であって、 直列リアクトル（２）は、巻き始め端（21）、中間タッ
プ（22、23）および巻き終り端（24）の各端子を有し、
巻き終り端の端子（24）が半導体スイッチ（3a）と単相
コンデンサ（1a）とを、中間タップの端子（23）が半導
体スイッチ（3b）と単相コンデンサ（1b）とを、中間タ
ップの端子（22）が半導体スイッチ（3c）と単相コンデ
ンサ（1c）とを、それぞれ直列接続し、単相コンデンサ
（1a、1b、1c）の各他端が入力端子（６）に接続され、
制御部（４）は、半導体スイッチ（3a、3b、3c）の各ゲ
ートを制御する無効電力補償装置。1. A series reactor (2), a semiconductor switch (3a, 3b, 3c), a single-phase capacitor (1a, 1b, 1c) and a control unit (4), and an input terminal (5) of a circuit. , 6) is a reactive power compensator that is connected to an AC power supply, and the series reactor (2) has winding start end (21), intermediate taps (22, 23) and winding end end (24). Have
The terminal (24) at the end of winding connects the semiconductor switch (3a) and the single-phase capacitor (1a), and the intermediate tap terminal (23) connects the semiconductor switch (3b) and the single-phase capacitor (1b) to the intermediate tap. The terminal (22) connects the semiconductor switch (3c) and the single-phase capacitor (1c) in series, and the other ends of the single-phase capacitors (1a, 1b, 1c) are connected to the input terminal (6),
The control unit (4) is a reactive power compensator that controls each gate of the semiconductor switches (3a, 3b, 3c).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59172285A JPH0679260B2 (en) | 1984-08-18 | 1984-08-18 | Reactive power compensator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59172285A JPH0679260B2 (en) | 1984-08-18 | 1984-08-18 | Reactive power compensator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6151220A JPS6151220A (en) | 1986-03-13 |
| JPH0679260B2 true JPH0679260B2 (en) | 1994-10-05 |
Family
ID=15939089
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59172285A Expired - Lifetime JPH0679260B2 (en) | 1984-08-18 | 1984-08-18 | Reactive power compensator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0679260B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2522423B2 (en) * | 1990-01-17 | 1996-08-07 | ダイキン工業株式会社 | Operation control device for air conditioner |
| JP4676369B2 (en) * | 2006-03-31 | 2011-04-27 | ニチコン株式会社 | Voltage fluctuation compensation device |
| CN104297581A (en) * | 2014-06-17 | 2015-01-21 | 上海致维电气有限公司 | Reactive switching simulation testing system and method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49121766A (en) * | 1973-03-26 | 1974-11-21 | ||
| JPS5463233A (en) * | 1977-10-28 | 1979-05-22 | Hitachi Ltd | Throw in method of power capacitor during thyristor transducer operation |
-
1984
- 1984-08-18 JP JP59172285A patent/JPH0679260B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6151220A (en) | 1986-03-13 |
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