JPH0210751U - - Google Patents
Info
- Publication number
- JPH0210751U JPH0210751U JP8756388U JP8756388U JPH0210751U JP H0210751 U JPH0210751 U JP H0210751U JP 8756388 U JP8756388 U JP 8756388U JP 8756388 U JP8756388 U JP 8756388U JP H0210751 U JPH0210751 U JP H0210751U
- Authority
- JP
- Japan
- Prior art keywords
- phase
- harmonic
- voltage
- signal
- 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.)
- Pending
Links
- 238000006243 chemical reaction Methods 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 7
- 230000001360 synchronised effect Effects 0.000 claims description 4
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims description 2
- 239000000284 extract Substances 0.000 claims 1
- 230000001629 suppression Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 8
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
Description
第１図はこの考案の一実施例の高調波電流抑制
装置の構成を示すブロツク図、第２図は第１図に
おける高調波電圧検出回路の具体構成を示すブロ
ツク図、第３図は実施例におけるインバータ、７
次同調フイルタおよび１１次ハイパスフイルタの
インピーダンス―周波数特性ならびに電力系統の
インピーダンス―周波数特性を示す特性図、第４
図は電流比ＩＳ／ＩＨの高調波次数に対する特性
を示す特性図、第５図はローパスフイルタを示す
等価回路図、第６図は従来の高調波電流検出装置
の構成の一例を示すブロツク図、第７図は第６図
における高調波電圧検出回路の具体構成を示すブ
ロツク図、第８図は従来例においてインバータ不
動作時の電流比ＩＳ／ＩＨの高調波次数に対する
特性を示す特性図、第９図は従来例においてイン
バータ動作時の電流比ＩＳ／ＩＨの高調波次数に
対する特性を示す特性図である。
１……電力系統、２……高調波発生負荷、３′
……高調波電圧検出回路、４……インバータ、３
１……３相／２相変換回路、３２……位相同期回
路、３３……同期２相信号発生回路、３４……座
標変換回路、３５……第１のハイパスフイルタ、
３６……第２のハイパスフイルタ、３７……座標
逆変換回路、３８……２相／３相変換回路。
FIG. 1 is a block diagram showing the configuration of a harmonic current suppressing device according to an embodiment of this invention, FIG. 2 is a block diagram showing a specific configuration of the harmonic voltage detection circuit in FIG. 1, and FIG. 3 is an embodiment. inverter, 7
Characteristic diagram showing the impedance-frequency characteristics of the next-order tuning filter and the 11th-order high-pass filter and the impedance-frequency characteristics of the power system, 4th
The figure is a characteristic diagram showing the characteristics of the current ratio IS/IH with respect to the harmonic order, FIG. 5 is an equivalent circuit diagram showing a low-pass filter, and FIG. 6 is a block diagram showing an example of the configuration of a conventional harmonic current detection device. FIG. 7 is a block diagram showing a specific configuration of the harmonic voltage detection circuit in FIG. FIG. 9 is a characteristic diagram showing the characteristics of the current ratio IS/IH with respect to the harmonic order during inverter operation in the conventional example. 1... Power system, 2... Harmonic generation load, 3'
...Harmonic voltage detection circuit, 4...Inverter, 3
DESCRIPTION OF SYMBOLS 1... 3-phase/2-phase conversion circuit, 32... Phase synchronization circuit, 33... Synchronized 2-phase signal generation circuit, 34... Coordinate conversion circuit, 35... First high-pass filter,
36...Second high-pass filter, 37...Coordinate inverse conversion circuit, 38...2-phase/3-phase conversion circuit.
Claims (1)
接続されて前記高調波発生負荷から電力系統へ流
出する高調波電流を抑制する高調波電流抑制装置
であつて、 前記電力系統から前記高調波発生負荷へ印加さ
れる３相の系統電圧の高調波成分を検出する高調
波電圧検出回路と、前記３相の系統電圧の高調波
成分に応じて出力電流が制御されるインバータと
、前記高調波電圧検出回路と前記インバータとの
間に介在し前記３相の系統電圧の高調波成分に対
して前記インバータがローパスフイルタと同等の
電流を流すように伝達関数が設定された伝達関数
回路とを備え、 前記高調波電圧検出回路を、前記電力系統から
前記高調波発生負荷へ印加される３相の系統電圧
に対応した３相の系統電圧対応信号を直交した２
相の系統電圧対応信号に変換する３相／２相変換
回路と、前記３相の系統電圧に同期した同期信号
を発生する位相同期回路と、前記同期信号に基づ
いて前記３相の系統電圧に同期しかつ直交した２
相の系統基本波周波数の正弦波信号を発生する同
期２相信号発生回路と、前記２相の系統基本波周
波数の正弦波信号を基準として前記２相の系統電
圧対応信号を前記系統基本波周波数成分が直流分
となるように座標変換する座標変換回路と、この
座標変換回路から出力される２相の系統電圧対応
信号から直流分を除去して交流分を抽出する第１
および第２のハイパスフイルタと、この第１およ
び第２のハイパスフイルタから出力される２相の
高調波電圧対応信号を２相の系統基本波周波数の
正弦波信号を基準として元の座標系に逆変換する
逆変換回路と、この逆変換回路から出力される２
相の高調波電圧対応信号を３相の高調波電圧対応
信号に変換する２相／３相変換回路とで構成した
高調波電流抑制装置。[Claims for Utility Model Registration] A harmonic current suppressing device that is connected in parallel with a harmonic generating load to a three-phase power system and suppresses harmonic current flowing from the harmonic generating load to the power system. , a harmonic voltage detection circuit that detects harmonic components of a three-phase system voltage applied from the power system to the harmonic generation load; and an output current is controlled according to the harmonic components of the three-phase system voltage. an inverter interposed between the harmonic voltage detection circuit and the inverter, and a transfer function is set so that the inverter flows a current equivalent to that of a low-pass filter for harmonic components of the three-phase system voltage. and a transfer function circuit, the harmonic voltage detection circuit is configured with two orthogonal three-phase system voltage corresponding signals corresponding to three-phase system voltages applied from the power system to the harmonic generation load.
a three-phase/two-phase conversion circuit that converts the signal into a signal corresponding to the system voltage of the three phases; a phase synchronization circuit that generates a synchronization signal synchronized with the system voltage of the three phases; 2 synchronous and orthogonal
a synchronous two-phase signal generation circuit that generates a sine wave signal having a system fundamental wave frequency of each phase; A coordinate conversion circuit that converts the coordinates so that the components become DC components, and a first circuit that removes the DC components from the two-phase grid voltage corresponding signal output from this coordinate conversion circuit and extracts the AC components.
and a second high-pass filter, and reverse the two-phase harmonic voltage corresponding signals output from the first and second high-pass filters to the original coordinate system with the two-phase system fundamental wave frequency sine wave signal as a reference. The inverse conversion circuit that converts and the 2 output from this inverse conversion circuit.
A harmonic current suppression device configured with a two-phase/three-phase conversion circuit that converts a phase harmonic voltage compatible signal into a three phase harmonic voltage compatible signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8756388U JPH0210751U (en) | 1988-06-30 | 1988-06-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8756388U JPH0210751U (en) | 1988-06-30 | 1988-06-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0210751U true JPH0210751U (en) | 1990-01-23 |
Family
ID=31312168
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8756388U Pending JPH0210751U (en) | 1988-06-30 | 1988-06-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0210751U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04133627A (en) * | 1990-09-21 | 1992-05-07 | Matsushita Electric Ind Co Ltd | Simultaneous electrothermal feeder |
| JP2021029070A (en) * | 2019-08-09 | 2021-02-25 | 国立大学法人東京工業大学 | Active filter device for power system |
-
1988
- 1988-06-30 JP JP8756388U patent/JPH0210751U/ja active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04133627A (en) * | 1990-09-21 | 1992-05-07 | Matsushita Electric Ind Co Ltd | Simultaneous electrothermal feeder |
| JP2021029070A (en) * | 2019-08-09 | 2021-02-25 | 国立大学法人東京工業大学 | Active filter device for power system |
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