JP3319039B2 - Harmonic suppression device - Google Patents
Harmonic suppression deviceInfo
- Publication number
- JP3319039B2 JP3319039B2 JP14316593A JP14316593A JP3319039B2 JP 3319039 B2 JP3319039 B2 JP 3319039B2 JP 14316593 A JP14316593 A JP 14316593A JP 14316593 A JP14316593 A JP 14316593A JP 3319039 B2 JP3319039 B2 JP 3319039B2
- Authority
- JP
- Japan
- Prior art keywords
- current
- inverter
- filter
- harmonic
- detection circuit
- 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
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
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
- Control Of Electrical Variables (AREA)
- Power Conversion In General (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、インバータを用いた高
調波抑制装置、詳しくは装置異常検出回路を備えた高調
波抑制装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a harmonic suppression device using an inverter, and more particularly to a harmonic suppression device provided with a device abnormality detection circuit.
【０００２】[0002]
【従来の技術】インバータを用いた高調波抑制装置（ア
クテイブフィルタ）は図３に示すように、インバータ
１，ＰＷＭ制御による搬送波除去用フィルタＦ1，制御
回路２，負荷電流検出器ＣＴ1等により構成されてい
る。2. Description of the Related Art As shown in FIG. 3 , a harmonic suppression device (active filter) using an inverter includes an inverter 1, a filter F 1 for removing a carrier by PWM control, a control circuit 2, a load current detector CT 1, and the like. It is configured.
【０００３】電流検出器ＣＴ1で検出した電力系統の負
荷電流ＩLから各次高調波バンドパスフィルタ（図示省
略）により各次高調波電流Ｉｈ−ｄｅｔが検出され、補
償電流指令検出回路２１，ＰＷＭ回路２２，ゲート駆動
回路２３を介してインバータ１を制御する。インバータ
１は搬送波除去フィルタＦ1及びアクテイブフィルタ用
トランスＴＲ1を介して系統に補償出力電流Ｉｈ−ｏｕ
ｔを出力して系統負荷電流ＩLの高調波を抑制する。[0003] The current detector load current each order harmonic bandpass filter from I L of the electric power system detected by CT 1 (not shown) by the following harmonic current Ih-det is detected, compensation current command detection circuit 21, The inverter 1 is controlled via the PWM circuit 22 and the gate drive circuit 23. Inverter 1 system to compensate the output current Ih-ou via a carrier rejection filter F 1 and transformer TR 1 for Akuteibu filter
outputs a t suppress harmonics of the system load current I L.
【０００４】アクテイブフィルタ（装置）ＡＦは制御回
路２等の故障により補償出力電流Ｉｈ−ｏｕｔが異常に
増加する場合がある。この場合、装置を停止して異常に
出力する高調波電流を抑制しなければ、装置が接続して
いる系統の高調波電流が増大し、系統に接続されている
他の機器に高調波による損傷を与える。従来、この装置
異常はインバータ１の出力電流Ｉｈ−ｏｕｔを検出して
みている。In the active filter (device) AF, the compensation output current Ih-out may abnormally increase due to a failure of the control circuit 2 or the like. In this case, unless the device is stopped to suppress the abnormally output harmonic current, the harmonic current of the system to which the device is connected will increase, and other devices connected to the system will be damaged by the harmonic. give. Conventionally, this device abnormality is detected by detecting the output current Ih-out of the inverter 1.
【０００５】[0005]
【発明が解決しようとする課題】しかし、インバータ出
力電流検出等による検出だけではアクテイブフィルタの
異常検出が十分ではなく、系統に流れる高調波電流を増
大させ他の機器に損傷を与えることがあった。However, the detection of an abnormality in the active filter is not sufficient only by the detection of the inverter output current or the like, and the harmonic current flowing through the system is increased, possibly damaging other devices. .
【０００６】本発明は、従来のこのような問題点に鑑み
てなされたものであり、その目的とするところは、装置
異常を確実に検出しインバータを停止して装置異常によ
る高調波の増大を防止しうる高調波抑制制御装置を提供
することにある。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems. It is an object of the present invention to reliably detect a device abnormality and stop an inverter to reduce an increase in harmonics caused by the device abnormality. An object of the present invention is to provide a harmonic suppression control device capable of preventing the same.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成するため
に、本発明における高調波抑制装置は、電力系統側に出
力するインバータと、電力系統の負荷電流から各次高調
波電流を検出し各次高調波電流を補償するようにインバ
ータを制御するインバータの制御回路と、インバータの
出力側に接続された搬送波除去用フィルタとを備えた高
調波抑制装置において、前記搬送波成分除去用フィルタ
のフィルタコンデンサの電流を検出する電流検出器と、
この電流検出器の出力の絶対値を求める絶対値検出回路
と、この絶対値検出回路の出力を設定値と比較する比較
器とからなるフィルタコンデンサの電流増加を検出する
電流増加検出回路を設け、この電流増加検出回路に出力
があったときインバータを停止させるものである。In order to achieve the above object, a harmonic suppression device according to the present invention is provided on the power system side.
Each harmonic from the inverter to be supplied and the load current of the power system
Wave current to compensate for each harmonic current.
The inverter control circuit that controls the inverter and the inverter
A harmonic wave suppression device comprising: a carrier wave removal filter connected to an output side;
A current detector for detecting the current of the filter capacitor of
Absolute value detection circuit that calculates the absolute value of the output of this current detector
To compare the output of this absolute value detection circuit with the set value.
A current increase detection circuit for detecting an increase in the current of the filter capacitor comprising a filter is provided, and when the current increase detection circuit has an output, the inverter is stopped.
【０００８】[0008]
【作用】高調波抑制装置が正常に動作している場合、フ
ィルタコンデンサにはＰＷＭ搬送周波数による高次高調
波電流がほぼ一定して流れるが、装置異常となるとこの
フィルタコンデンサ電流が増加し電流検出器の出力が増
加する。電流増加検出回路はこの検出電流レベルの増大
を検出すると、インバータを停止させて装置異常による
高調波電流の増加を防止する。When the harmonic suppression device is operating normally, the high-order harmonic current due to the PWM carrier frequency flows through the filter capacitor almost constantly, but when the device becomes abnormal, the filter capacitor current increases and the current is detected. The output of the vessel increases. When the current increase detection circuit detects the increase in the detected current level, it stops the inverter to prevent an increase in harmonic current due to a device abnormality.
【０００９】[0009]
【実施例】本発明の実施例を図面を参照して説明する。
図１について、ＡＦはアクテイブフィルタで、インバー
タ１，搬送波除去用フィルタＦ1，制御回路２，負荷電
流検出器ＣＴ1，フィルタコンデンサ電流検出器ＣＴ2等
で構成され、制御回路２は補償電流指令検出回路２１，
ＰＷＭ回路２２，ゲート駆動回路２３及び電流検出器Ｃ
Ｔ2に接続された電流増加検出回路２５等で構成されて
いる。An embodiment of the present invention will be described with reference to the drawings.
For Figure 1, AF is Akuteibu filter, inverter 1, the carrier removal filter F 1, the control circuit 2, the load current detector CT 1, is constituted by the filter capacitor current detector CT 2, etc., the control circuit 2 compensation current command Detection circuit 21,
PWM circuit 22, gate drive circuit 23, and current detector C
It is composed of connected current increase detection circuit 25 or the like T 2.
【００１０】この電流増加検出回路２５は、電流検出器
ＣＴ2で検出した搬送波除去用フィルタＦ 1 のフィルタコ
ンデンサＣ 1 に流れるＰＷＭ搬送波周波数による高次高
調波電流Ｉｈ−ｃａｒｒを全波整流し平滑してその絶対
値を求める絶対値検出回路２６及びこの絶対値検出回路
からの出力を基準設定値Ｅ0と比較する比較回路２７で
構成されており、この比較回路に出力が出るとゲート駆
動回路２３を介してインバータ１を停止させるようにな
っている。[0010] The current increase detection circuit 25, a current detector higher harmonic current Ih-carr by PWM carrier frequency flows through the filter capacitor C 1 of the carrier removing filter F 1 detected by CT 2 full-wave rectifying and smoothing the absolute value detection circuit 26 and is composed of a comparator circuit 27 for comparing the output from the absolute value detection circuit with a reference set value E 0, the output of the comparison circuit exits the gate drive circuit to obtain the absolute value The inverter 1 is stopped via 23.
【００１１】アクテイブフィルタＡＦの正常時には図２
に示すように、高調波出力電流Ｉｈ−ｏｕｔと検出高調
波電流Ｉｈ−ｄｅｔが一致しており、フィルタコンデン
サＣ1に流れる電流Ｉｈ−ｃａｒｒはほぼ一定レベルＡ
で流れている。When the active filter AF is normal, FIG.
As shown in harmonic output current Ih-out and detecting the harmonic current Ih-det are matched, the current Ih-carr flowing into the filter capacitor C 1 is substantially constant level A
It is flowing in.
【００１２】アクテイブフィルタＡＦが動作異常となる
と、高調波出力電流Ｉｈ−ｏｕｔは大きく変化し検出高
調波電流Ｉｈ−ｄｅｔとは不一致となるので、フィルタ
コンデンサＣ1に流れる高調波電流Ｉｈ−ｃａｒｒのレ
ベルＢは図２（ｄ）に示すように増大する。[0012] Akuteibu filter AF becomes abnormal operation, the harmonic output current Ih-out is the mismatch greatly changes detected harmonic currents Ih-det, the harmonic current Ih-carr flowing into the filter capacitor C 1 The level B increases as shown in FIG.
【００１３】電流検出回路２５の比較回路２７の設定値
Ｅ0を正常時の整流回路２６から出力される電流Ｉｈ−
ｃａｒｒの絶対値より少し大き目に設定しておく。The set value E 0 of the comparison circuit 27 of the current detection circuit 25 is set to the value of the current Ih−
It is set slightly larger than the absolute value of carr.
【００１４】しかして、装置異常が発生するとコンデン
サＣ1に流れる電流Ｉｈ−ｃａｒｒは増大し、絶対値検
出回路２６からの出力は設定値Ｅ0より大きくなるの
で、比較回路２７からゲート駆動回路２３にインバータ
停止指令を出力してインバータ１を停止させる。[0014] Thus, when the device abnormality occurs current Ih-carr flowing to the capacitor C 1 is increased, since the output from the absolute value detection circuit 26 becomes greater than the set value E 0, the gate from the comparison circuit 27 drive circuit 23 To output an inverter stop command to stop the inverter 1.
【００１５】[0015]
【発明の効果】本発明は、上述のとおり構成されている
ので、次に記載する効果を奏する。Since the present invention is configured as described above, the following effects can be obtained.
【００１６】（１）搬送波成分除去用フィルタのフィル
タコンデンサに流れる高次高調波電流の絶対値検出によ
り装置の異常を検出するため装置異常検出回路が簡単に
なる。(1) A device abnormality detection circuit is simplified because an abnormality of the device is detected by detecting an absolute value of a higher harmonic current flowing through a filter capacitor of a filter for removing a carrier component .
【００１７】（２）フィルタコンデンサ電流を検出して
いるので、装置異常検出が過電流検出方式に比し確実に
なる。(2) Since the filter capacitor current is detected, the device abnormality detection is more reliable than the overcurrent detection method.
【図１】実施例にかかるアクテイブフィルタの回路構成
図。FIG. 1 is a circuit configuration diagram of an active filter according to an embodiment.
【図２】回路各部の波形図。FIG. 2 is a waveform diagram of each part of the circuit.
【図３】従来アクテイブフィルタの回路構成図。FIG. 3 is a circuit configuration diagram of a conventional active filter.
１…インバータ ２…制御回路 ２１…補償電流指令検出回路 ２２…ＰＷＭ回路 ２３…ゲート駆動回路 ２５…電流増加検出回路 ２６…絶対値検出回路 ２７…比較器 ＡＦ…アクテイブフィルタ Ｃ1…フィルタコンデンサ ＣＴ1 、ＣＴ 2 …電流検出器 Ｆ1…搬送波除去用フィルタ Ｉｈ−ｃａｒｒ…フィルタコンデンサ電流 Ｉｈ−ｄｅｔ…高調波検出電流 Ｉｈ−ｏｕｔ…高調波出力電流1 ... inverter 2 ... control circuit 21 ... compensation current command detection circuit 22 ... PWM circuit 23 ... gate drive circuit 25 ... current increase detection circuit 26 ... absolute value detection circuit 27 ... comparator AF ... Akuteibu filter C 1 ... filter capacitor CT 1 , CT 2 ... current detector F 1 ... filter for removing carrier wave Ih-carr ... filter capacitor current Ih-det ... harmonic detection current Ih-out ... harmonic output current
フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) G05F 1/70 H02J 3/01 H02M 1/12 Continuation of the front page (58) Field surveyed (Int.Cl. 7 , DB name) G05F 1/70 H02J 3/01 H02M 1/12
Claims (1)
力系統の負荷電流から各次高調波電流を検出し各次高調
波電流を補償するようにインバータを制御するインバー
タの制御回路と、インバータの出力側に接続された搬送
波除去用フィルタとを備えた高調波抑制装置において、 前記搬送波成分除去用フィルタのフィルタコンデンサの
電流を検出する電流検出器と、この電流検出器の出力の
絶対値を求める絶対値検出回路と、この絶対値検出回路
の出力を設定値と比較する比較器とからなるフィルタコ
ンデンサの電流増加を検出する電流増加検出回路を設
け、この電流増加検出回路に出力があったときインバー
タを停止させることを特徴とする高調波抑制装置。1. A an inverter for outputting the electric power system side, electrostatic
Detects each harmonic current from the load current of the power system and
Control circuit of the inverter for controlling the inverter so as to compensate the wave current, and a carrier connected to the output side of the inverter.
In the harmonic suppression device that includes a wave filter for removing, a current detector for detecting the current of the filter capacitor of the carrier component removing filter, the output of the current detector
Absolute value detection circuit for finding the absolute value and this absolute value detection circuit
Filter, consisting of a comparator that compares the output of the
A harmonic suppression device comprising: a current increase detection circuit for detecting an increase in the current of a capacitor; and stopping an inverter when an output is provided to the current increase detection circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14316593A JP3319039B2 (en) | 1993-06-15 | 1993-06-15 | Harmonic suppression device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14316593A JP3319039B2 (en) | 1993-06-15 | 1993-06-15 | Harmonic suppression device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH075942A JPH075942A (en) | 1995-01-10 |
| JP3319039B2 true JP3319039B2 (en) | 2002-08-26 |
Family
ID=15332431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14316593A Expired - Lifetime JP3319039B2 (en) | 1993-06-15 | 1993-06-15 | Harmonic suppression device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3319039B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6943731B2 (en) * | 2017-11-14 | 2021-10-06 | 三菱重工サーマルシステムズ株式会社 | Active filter, calculation method by active filter, control method and program by motor drive device |
| JP6690662B2 (en) * | 2018-03-29 | 2020-04-28 | ダイキン工業株式会社 | Power quality control system and air conditioner |
| JP7044984B2 (en) * | 2020-04-06 | 2022-03-31 | ダイキン工業株式会社 | Power quality control system and air conditioner |
-
1993
- 1993-06-15 JP JP14316593A patent/JP3319039B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH075942A (en) | 1995-01-10 |
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