MAXIMUM POWER TRACKING CONTROL DEVICE AND MAXIMUM POWER TRACKING CONTROL METHOD

• Main Authors: YAMAMOTO SHIGERU, URA DAISUKE
• Format: Patent
• Language: English; Japanese
• Published: 04.06.2015
• Subjects: CONTROLLING; PHYSICS; REGULATING; SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES

PROBLEM TO BE SOLVED: To provide a maximum power tracking control device capable of achieving high-accuracy extremum seeking while making parameter measurement and calculation simple.SOLUTION: A maximum power tracking control device 1 for exerting a tracking control over a variable u so as to make output power y maximum for a control target 2 of an evaluation function y=f (u), includes: an HPF section 11 removing a DC component from the output power, and outputting a first signal; a LPF section 12 extracting a low-pass component from a second signal obtained by multiplying the first signal by a first perturbation signal, and outputting a third signal; an integrating section 13 integrating the third signal, and outputting a fourth signal; and a perturbation-signal switching section 15 outputting a first perturbation signal at constant amplitude if a discrimination function h ( ) set based only on the third signal is greater than a threshold h, and outputting a second perturbation signal having attenuated amplitude if the discrimination function h ( ) is equal to or smaller than the threshold h, a signal obtained by adding the first or second perturbation signal to the fourth signal being input to the control target 2. 【課題】パラメータ計測及び演算を簡素化しつつ高精度な極値探索が可能な最大電力追従制御装置を提供する。【解決手段】評価関数ｙ＝ｆ（ｕ）の制御対象２に対して出力電力ｙが最大となるよう変数ｕを追従制御させる最大電力追従制御装置１は、出力電力ｙの直流成分を除去した第１信号を出力するＨＰＦ部１１と、第１信号に第１の摂動信号が乗算された第２信号の低域成分を抽出した第３信号を出力するＬＰＦ部１２と、第３信号を積分した第４信号を出力する積分部１３と、第３信号のみに基づいて設定された判別関数ｈ（ ）が閾値ｈｔｈよりも大きい場合、振幅一定の第１の摂動信号を出力し、判別関数ｈ（ ）が閾値ｈｔｈ以下である場合、振幅が減衰する第２の摂動信号を出力する摂動信号切替部１５とを備え、第４信号に第１の摂動信号または第２の摂動信号を加算した信号を制御対象２に入力する。【選択図】図４