ARC DETECTION CIRCUIT, BREAKER, POWER CONDITIONER, SOLAR PANEL, SOLAR PANEL ACCESSORY MODULE, AND JUNCTION BOX

• Main Authors: KOGA TATSUO, KANAMORI KEITA
• Format: Patent
• Language: English; Japanese
• Published: 21.05.2020
• 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; 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; MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

To provide an arc detection circuit and the like capable of precisely detecting an arc occurring on a transmission path.SOLUTION: An arc detection circuit 10 detects an arc occurring on a transmission path A connecting a solar panel 31 that generates a DC power and a power conversion unit 50 that converts the DC power into an AC power. The arc detection circuit 10 includes: a resonance circuit 5 that is disposed in a path A3 connecting a positive transmission path A1 and a negative transmission path A2 to be connected parallel to the power conversion unit 50 in order to allow a signal of AC component included in the signal flowing on the transmission path A to flow to the path A3 from the transmission path A; a resistance R1 that is connected parallel to resonance circuit 5 in the path A3 and generates a voltage signal corresponding to a signal of AC component; a filter part 12 to which the voltage signal generated by the resistance R1 is input and allows a signal of the frequency corresponding to the arc to pass therethrough; and an arc determination part 11 that determines an occurrence of an arc based on the signal passing through the filter part 12.SELECTED DRAWING: Figure 1 【課題】伝送路において発生するアークを正確に検出できるアーク検出回路等を提供する。【解決手段】直流電力を生成する太陽光パネル３１と、直流電力を交流電力に変換する電力変換装置５０とを接続する伝送路Ａにおいて発生するアークを検出するアーク検出回路１０は、正側伝送路Ａ１と負側伝送路Ａ２とを結ぶ経路Ａ３に、電力変換装置５０と並列に接続されるように配置され、伝送路Ａを流れる信号に含まれる交流成分の信号を伝送路Ａから経路Ａ３へ流す共振回路５と、経路Ａ３において共振回路５と直列に接続され、交流成分の信号に応じた電圧信号を発生する抵抗Ｒ１と、抵抗Ｒ１に発生した電圧信号が入力され、アークに対応した周波数の信号を通過させるフィルタ部１２と、フィルタ部１２を通過した信号に基づいて、アークの発生を判定するアーク判定部１１と、を備える。【選択図】図１