JPH0253234U - - Google Patents

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Publication number
JPH0253234U
JPH0253234U JP12925588U JP12925588U JPH0253234U JP H0253234 U JPH0253234 U JP H0253234U JP 12925588 U JP12925588 U JP 12925588U JP 12925588 U JP12925588 U JP 12925588U JP H0253234 U JPH0253234 U JP H0253234U
Authority
JP
Japan
Prior art keywords
current
harmonic
load
current detection
compensation
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
Application number
JP12925588U
Other languages
Japanese (ja)
Other versions
JPH0724910Y2 (en
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP1988129255U priority Critical patent/JPH0724910Y2/en
Publication of JPH0253234U publication Critical patent/JPH0253234U/ja
Application granted granted Critical
Publication of JPH0724910Y2 publication Critical patent/JPH0724910Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Supply And Distribution Of Alternating Current (AREA)

Description

【図面の簡単な説明】[Brief explanation of drawings]

第１図はこの考案の一実施例の構成を示すブロ
ツク図、第２図は従来のアクテイブフイルタの構
成を示すブロツク図、第３図は従来のアクテイブ
フイルタにおける制御回路の具体構成を示すブロ
ツク図である。 ＩＮ１，ＩＮ２…インバータ回路、ＬＤ…負荷
、１…電力系統、２…注入回路、３…高調波電流
検出部、４…補償電流検出部。 FIG. 1 is a block diagram showing the configuration of an embodiment of this invention, FIG. 2 is a block diagram showing the configuration of a conventional active filter, and FIG. 3 is a block diagram showing the specific configuration of a control circuit in a conventional active filter. It is. IN 1 , IN 2 ...Inverter circuit, LD...Load, 1...Power system, 2...Injection circuit, 3...Harmonic current detection section, 4...Compensation current detection section.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 電力系統から負荷へ供給される負荷電流中の高
調波電流成分を高調波次数で複数群に分けて検出
する負荷電流検出部と、前記電力系統へ注入回路
を通して補償電流を注入する複数のインバータ回
路と、前記複数のインバータ回路から前記注入回
路を通して前記電力系統へ注入される補償電流中
の高調波電流成分を前記負荷電流検出部と同じに
複数群に分けて検出する補償電流検出部と、正負
の微小値をそれぞれ上側閾値および下側閾値とし
前記負荷電流検出部により検出された各群の高調
波電流成分と前記補償電流検出部により検出され
た各群の高調波電流成分との各々の和を前記上側
閾値および下側閾値と比較し比較結果に基づいて
前記複数のインバータ回路を制御することにより
前記負荷電流中の高調波電流成分と前記補償電流
中の高調波電流成分との和をそれぞれ正負の所定
微小値範囲内に収める複数のヒステリシスコンパ
レータとを備えたアクテイブフイルタ。 A load current detection unit that detects harmonic current components in a load current supplied from a power system to a load by dividing them into multiple groups based on harmonic order, and a plurality of inverter circuits that inject compensation current into the power system through an injection circuit. a compensation current detection unit that detects harmonic current components in the compensation current injected from the plurality of inverter circuits through the injection circuit into the power system by dividing them into a plurality of groups in the same way as the load current detection unit; the respective sums of the harmonic current components of each group detected by the load current detection section and the harmonic current components of each group detected by the compensation current detection section, with the minimum values of is compared with the upper threshold value and the lower threshold value, and the sum of the harmonic current component in the load current and the harmonic current component in the compensation current is determined by controlling the plurality of inverter circuits based on the comparison results. An active filter including a plurality of hysteresis comparators that keep the positive and negative values within a predetermined minimum value range.
JP1988129255U 1988-09-30 1988-09-30 Active filter Expired - Lifetime JPH0724910Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1988129255U JPH0724910Y2 (en) 1988-09-30 1988-09-30 Active filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1988129255U JPH0724910Y2 (en) 1988-09-30 1988-09-30 Active filter

Publications (2)

Publication Number Publication Date
JPH0253234U true JPH0253234U (en) 1990-04-17
JPH0724910Y2 JPH0724910Y2 (en) 1995-06-05

Family

ID=31383364

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1988129255U Expired - Lifetime JPH0724910Y2 (en) 1988-09-30 1988-09-30 Active filter

Country Status (1)

Country Link
JP (1) JPH0724910Y2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0433527A (en) * 1990-05-30 1992-02-04 Toyo Electric Mfg Co Ltd Harmonic compensation device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5636653A (en) * 1979-08-31 1981-04-09 Unitika Ltd Photosensitive resin plate for relief

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5636653A (en) * 1979-08-31 1981-04-09 Unitika Ltd Photosensitive resin plate for relief

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0433527A (en) * 1990-05-30 1992-02-04 Toyo Electric Mfg Co Ltd Harmonic compensation device

Also Published As

Publication number Publication date
JPH0724910Y2 (en) 1995-06-05

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