POWER CONVERSION DEVICE AND PHOTOVOLTAIC POWER GENERATION SYSTEM

• Main Authors: SONOBE KAORU, ITO TOMOMICHI, WADA TAMAKI, NISHIZAWA HIROTAKA, KUNISADA HIDEAKI, NAKAJIMA YOSHIRO
• Format: Patent
• Language: English; Japanese
• Published: 05.09.2016
• Subjects: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS; GENERATION; GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRA-REDRADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, E.G. USINGPHOTOVOLTAIC [PV] MODULES; SYSTEMS FOR STORING ELECTRIC ENERGY

PROBLEM TO BE SOLVED: To provide a photovoltaic power generation system and photovoltaic inverter that are capable of effectively melting snow deposited on a solar panel.SOLUTION: A power conversion device is connected between a solar panel and a power system. The power conversion device has: a power generation mode for performing AC conversion on power generated by the solar panel; and a snow melting mode for making the solar panel generate heat by supplying the solar panel with power acquired from the power system. The power conversion device in the snow melting mode controls a voltage output to the solar panel so that current supplied from the power conversion device to the solar panel is made to have a first current value smaller than the solar panel's overcurrent level for predetermined duration.SELECTED DRAWING: Figure 7 【課題】太陽光パネルの上に積もった雪を効果的に溶かすことのできる太陽光発電システムおよび太陽光インバータを提供する。【解決手段】太陽光パネルと電力系統の間に接続される電力変換装置であって、電力変換装置は、太陽光パネルの発電電力を交流変換する発電モードと、電力系統から電力を得て、電力を前記太陽光パネルに供給することで太陽光パネルを発熱させる融雪モードと、を備え、融雪モードの際には、電力変換装置から太陽光パネルに供給される電流が、太陽光パネルの過電流レベルよりも小さい値である第一の電流値が所定の期間流れるように、太陽光パネルに出力する電圧を制御する電力変換装置。【選択図】 図７