JP2009080812A - 2重フィードバックループ及び電力リップルに基づく電力変換における最大電力点追従方法及び装置 - Google Patents
2重フィードバックループ及び電力リップルに基づく電力変換における最大電力点追従方法及び装置 Download PDFInfo
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Abstract
【解決手段】この装置は、入力キャパシタ220を有する変換モジュール206と、最大電力点(MPP)を決定し、MPPの近くで変換モジュールを作動させる第1のフィードバックループ216と、を備える。この装置は、入力キャパシタによるエネルギ蓄積とエネルギ供給との差を決定し、差を表す誤差信号を生成し、MPPへと駆動するよう変換モジュールの少なくとも一つの動作パラメータを調整するために、誤差信号を第1のフィードバックループに結合する第2のフィードバックループ218を更に備える。
【選択図】図2
Description
Claims (17)
- DC入力電力をAC出力電力に変換する装置であって、
入力キャパシタを備える変換モジュールと、
最大電力点(MPP)を決定し、前記MPPの近くで前記変換モジュールを動作させるための第1のフィードバックループと、
前記入力キャパシタによるエネルギ蓄積とエネルギ供給との差を決定し、該差を表す誤差信号を生成し、前記MPPへと駆動するよう前記変換モジュールの少なくとも一つの動作パラメータを調整するために、前記誤差信号を前記第1のフィードバックループに結合する第2のフィードバックループと、
を備える装置。 - 前記誤差信号が、第1の電力測定量と第2の電力測定量との間の差に基づいて決定される、請求項1に記載の装置。
- 前記第1の電力測定量が商用電力グリッドのサイクルの第1の位相範囲の間に前記DC入力電力を測定した量であり、前記第2の電力測定量が前記サイクルの第2の位相範囲の間に前記DC入力電力を測定した量である、請求項2に記載の装置。
- 前記第1の電力測定量が前記第1の位相範囲の間の平均DC入力電力を含み、前記第2の電力測定量が前記第2の位相範囲の間の平均DC入力電力を含む、請求項2に記載の装置。
- 前記第1の位相範囲及び前記第2の位相範囲が等しい長さである、請求項2に記載の装置。
- 前記第2のフィードバックループが前記誤差信号を積分する積分器を備える、請求項1に記載の装置。
- DC入力電力をAC出力電力に変換する方法であって、
最大電力点(MPP)を決定するステップと、
前記MPPの近くで変換モジュールを動作させるステップと、
を含み、
MPPを決定する前記ステップ及び変換モジュールを動作させる該ステップが、第1のフィードバックループによって実施され、
前記変換モジュールにおけるエネルギ蓄積とエネルギ供給との差を決定するステップと、
前記差を表す誤差信号を生成するステップと、
前記MPPへと駆動するよう前記変換モジュールの少なくとも一つの動作パラメータを調整するために、前記第1のフィードバックループに前記誤差信号を結合するステップと、
を更に含み、
差を決定する前記ステップ、誤差信号を生成する前記ステップ、及び、前記誤差信号を結合する前記ステップが、第2のフィードバックループによって実施される、
方法。 - 前記エネルギ蓄積及びエネルギ供給がキャパシタによって実行される、請求項7に記載の方法。
- 前記誤差信号が、第1の電力測定量と第2の電力測定量との間の差に基づいて決定される、請求項7に記載の方法。
- 前記第1の電力測定量が、商用電力グリッドのサイクルの第1の位相範囲の間に前記DC入力電力を測定した量であり、前記第2の電力測定量が、前記サイクルの第2の位相範囲の間に前記DC入力電力を測定した量である、請求項9に記載の方法。
- 前記第1の電力測定量が、前記第1の位相範囲の間の平均DC入力電力を含み、前記第2の電力測定量が、前記第2の位相範囲の間の平均DC入力電力を含む、請求項9に記載の方法。
- 前記第1の位相範囲及び前記第2の位相範囲が等しい長さである、請求項9に記載の方法。
- 前記誤差信号を積分するステップを更に含む、請求項7に記載の方法。
- DC入力電力をAC出力電力に変換するシステムであって、
少なくとも一つの光電池(PV)モジュールと、
入力キャパシタを有する少なくとも一つの変換モジュールと、
最大電力点(MPP)を決定し、前記MPPの近くで前記変換モジュールを作動させる少なくとも一つの第1のフィードバックループと、
前記入力キャパシタによるエネルギ蓄積とエネルギ供給との差を決定し、該差を表す誤差信号を生成し、前記MPPへと駆動するよう前記少なくとも一つの変換モジュールの少なくとも一つの動作パラメータを調整するために、前記誤差信号を前記少なくとも一つの第1のフィードバックループに結合する少なくとも一つの第2のフィードバックループと、
を備えるシステム。 - 前記誤差信号が、第1の電力測定量と第2の電力測定量との間の差に基づいて決定される、請求項14に記載のシステム。
- 前記第1の電力測定量が、商用電力グリッドのサイクルの第1の位相範囲の間に前記DC入力電力を測定した量であり、前記第2の電力測定量が、前記サイクルの第2の位相範囲の間に前記DC入力電力を測定した量である、請求項15に記載のシステム。
- 前記少なくとも一つの変換モジュールに結合された少なくとも一つのDC−DCコンバータを更に備える、請求項14に記載のシステム。
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