POWER CONVERSION DEVICE AND POWER CONVERSION SYSTEM

• Main Authors: ITO TOMOMICHI, LEE CHIA TSE, ICHINOSE MASAYA, KAGEYAMA HIROSHI
• Format: Patent
• Language: English; Japanese
• Published: 02.07.2020
• Subjects: CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; SYSTEMS FOR STORING ELECTRIC ENERGY

To provide a power conversion device and a power conversion system capable of reliably suppressing a power fluctuation depending on SOC.SOLUTION: A power conversion device (101) comprises a power converter (102) that controls charge and discharge of a storage battery (106) and is interconnected with a power system (104). The power converter charges an accumulator by power input from the power system while outputting power from the accumulator to the power system. The power converter charges or discharges the accumulator for one of increment and decrement of a system frequency and neither charges nor discharges the accumulator for the other of the increment and the decrement of the system frequency depending on state of charge of the accumulator.SELECTED DRAWING: Figure 1 【課題】ＳＯＣに応じて確実に電力動揺を抑制できる電力変換装置ならびに電力変換システムを提供する。【解決手段】電力変換装置（１０１）は、蓄電池（１０６）充放電を制御し、電力系統（１０４）と連系する電力変換器（１０２）を備え、電力変換器は蓄電池からの電力を電力系統に出力するとともに、電力系統から入力する電力を蓄電池に充電するものであって、電力変換器は、蓄電池の充電状態に応じて、系統周波数の増加分および減少分の一方に対して、蓄電池を充電もしくは放電し、系統周波数の増加分および減少分の他方に対して、蓄電池を充放電しない。【選択図】図１