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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