JPH0260449U - - Google Patents
Info
- Publication number
- JPH0260449U JPH0260449U JP13912288U JP13912288U JPH0260449U JP H0260449 U JPH0260449 U JP H0260449U JP 13912288 U JP13912288 U JP 13912288U JP 13912288 U JP13912288 U JP 13912288U JP H0260449 U JPH0260449 U JP H0260449U
- Authority
- JP
- Japan
- Prior art keywords
- phase
- reactor
- parallel
- circuit
- series
- 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
- Supply And Distribution Of Alternating Current (AREA)
Description
第１図は本考案が適用された一実施例の要部構
成を示す主回路構成図、第２図は本考案が適用さ
れた他の実施例の要部構成を示す主回路構成図、
第３図は公知のアクテイブフイルタを具えた三相
交流系統の主回路構成図、第４図は公知の並列共
振回路付アクテイブフイルタを具えた三相交流系
統の主回路構成図である。
１……三相交流系統電源、２……負荷、３……
交流リアクトル、４……三相ＰＷＭコンバータ、
５，１１……直流コンデンサ、６……並列共振回
路、７……リアクトル、８，９……接触器、１０
……三相ダイオード整流回路、１２……過電圧検
出回路、１３……抵抗、１４……サイリスタ。
FIG. 1 is a main circuit configuration diagram showing the main part configuration of one embodiment to which the present invention is applied, FIG. 2 is a main circuit block diagram showing the main part configuration of another embodiment to which the present invention is applied,
FIG. 3 is a main circuit configuration diagram of a three-phase AC system equipped with a known active filter, and FIG. 4 is a main circuit configuration diagram of a three-phase AC system equipped with a known active filter with parallel resonant circuit. 1...Three-phase AC power supply, 2...Load, 3...
AC reactor, 4... three-phase PWM converter,
5, 11... DC capacitor, 6... Parallel resonant circuit, 7... Reactor, 8, 9... Contactor, 10
... Three-phase diode rectifier circuit, 12 ... Overvoltage detection circuit, 13 ... Resistor, 14 ... Thyristor.
Claims (1)
波補償設備であつて、三相ＰＷＭコンバータと、
該三相ＰＷＭコンバータの交流側の各相に直列に
挿入された変流リアクトルと、前記三相ＰＷＭコ
ンバータの直流端子間に接続された第１の直流コ
ンデンサと、前記交流リアクトルの電源側の各相
に直列に挿入された電源周波数に共振する第１の
リアクトルとコンデンサからなる並列共振回路と
、該並列共振回路の出力側各相の接続点に並列に
接続される第２のリアクトルと、該第２のリアク
トルと前記交流リアクトルの間に直列接続される
接触器と、前記三相ＰＷＭコンバータを制御する
制御装置とを備えてなるアクテイブフイルタにお
いて、前記交流リアクトルと接触器の各相接続点
に並列に接続された三相ダイオード整流回路と、
該三相ダイオード整流回路の直流端子間に接続さ
れた第２の直流コンデンサとを設けてなることを
特徴とするアクテイブフイルタの保護回路。 ２ 前記第２の直流コンデンサに並列に接続され
直流端子間電圧を検出する過電圧検出回路と、該
過電圧検出回路に並列に抵抗とサイリスタからな
る直列回路とを具備するようにしたことを特徴と
する請求項第１項記載のアクテイブフイルタの保
護回路。[Scope of claim for utility model registration] 1. Harmonic compensation equipment connected in parallel with load equipment to a power supply system, which includes a three-phase PWM converter,
A current transformation reactor inserted in series with each phase on the AC side of the three-phase PWM converter, a first DC capacitor connected between the DC terminals of the three-phase PWM converter, and each on the power supply side of the AC reactor. a parallel resonant circuit consisting of a first reactor and a capacitor that resonate with the power supply frequency inserted in series with the phase; a second reactor connected in parallel to the connection point of each phase on the output side of the parallel resonant circuit; In an active filter comprising a contactor connected in series between a second reactor and the AC reactor, and a control device for controlling the three-phase PWM converter, each phase connection point between the AC reactor and the contactor A three-phase diode rectifier circuit connected in parallel,
A protection circuit for an active filter, comprising: a second DC capacitor connected between DC terminals of the three-phase diode rectifier circuit. 2. An overvoltage detection circuit connected in parallel to the second DC capacitor to detect the voltage between DC terminals, and a series circuit including a resistor and a thyristor connected in parallel to the overvoltage detection circuit. A protection circuit for an active filter according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13912288U JPH073801Y2 (en) | 1988-10-25 | 1988-10-25 | Protection circuit for active filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13912288U JPH073801Y2 (en) | 1988-10-25 | 1988-10-25 | Protection circuit for active filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0260449U true JPH0260449U (en) | 1990-05-02 |
| JPH073801Y2 JPH073801Y2 (en) | 1995-01-30 |
Family
ID=31402089
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13912288U Expired - Lifetime JPH073801Y2 (en) | 1988-10-25 | 1988-10-25 | Protection circuit for active filter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH073801Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0433391A (en) * | 1990-05-30 | 1992-02-04 | Sanyo Electric Co Ltd | Hybrid integrated circuit device |
-
1988
- 1988-10-25 JP JP13912288U patent/JPH073801Y2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0433391A (en) * | 1990-05-30 | 1992-02-04 | Sanyo Electric Co Ltd | Hybrid integrated circuit device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH073801Y2 (en) | 1995-01-30 |