POWER CONVERSION SYSTEM, AND POWER CONVERSION DEVICE

To improve power generation efficiency and power conversion efficiency of a solar cell (2) in a separated type power conversion system (1).SOLUTION: A first control circuit (12) performs MPPT (Maximum Power Point Tracking) control of a DC/DC converter (11). A second control circuit (22) controls an...

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Bibliographic Details
Main Authors MAEBA KOTA, ITO TOMONORI, HORIO WATARU, HANAMURA KENJI
Format Patent
LanguageEnglish
Japanese
Published 18.04.2019
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Summary:To improve power generation efficiency and power conversion efficiency of a solar cell (2) in a separated type power conversion system (1).SOLUTION: A first control circuit (12) performs MPPT (Maximum Power Point Tracking) control of a DC/DC converter (11). A second control circuit (22) controls an inverter (21) in such a manner that voltage of a DC bus (40) between the DC/DC converter (11) and the inverter (21) becomes voltage corresponding to a voltage command value which is calculated by the MPPT control due to the first control circuit (12). After the voltage of the DC bus (40) is stabilized at the voltage corresponding to the transmitted voltage control value, the first control circuit (12) calculates a next voltage command value by the MPPT control. After the voltage command value is received from the first control circuit (12), the second control circuit (22) controls the inverter (21) on the basis of the received voltage command value and, after the voltage of the DC bus (40) is stabilized, transmits update confirmation data to the first control circuit (12).SELECTED DRAWING: Figure 1 【課題】分離型の電力変換システム(1)において、太陽電池(2)の発電効率および電力変換効率を高くする。【解決手段】第1制御回路(12)は、DC/DCコンバータ(11)をMPPT(MaximumPowerPointTracking)制御する。第2制御回路(22)は、DC/DCコンバータ(11)とインバータ(21)間の直流バス(40)の電圧が、第1制御回路(12)によるMPPT制御により算出された電圧指令値に対応する電圧になるように、インバータ(21)を制御する。第1制御回路(12)は、直流バス(40)の電圧が、送信した電圧指令値に対応する電圧に安定した後、MPPT制御による次の電圧指令値を算出する。第2制御回路(22)は、第1制御回路(12)から電圧指令値を受信した後、受信した電圧指令値をもとにインバータ(21)を制御し、直流バス(40)の電圧が安定した後に、更新確認データを第1制御回路(12)に送信する。【選択図】図1
Bibliography:Application Number: JP20170183632