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A Discussion of the Solution for High-voltage Safety Hazards on DC Side in Residential PV System

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Growing solar photovoltaic demand In the past 2019, global solar photovoltaic installed capacity has also grown tremendously. Taking the European Union as an example, according to data from Solar Power Europe, 2019 is the best year for solar photovoltaic development in the European Union, with 16.7 GW of new installations, an increase of 104% (8.2 GW of new installations in 2018). Spain increased its installed capacity by 4.7 GW in 2019, making it the EU’s largest solar market, followed by Germany (+4 GW), the Netherlands (+2.5 GW), France (+1.1 GW) and a surprised Poland (the installed capacity quadrupled in 2019, reaching 784 MW by the end of 2019, and the EU’s incremental photovoltaic capacity reached 131.9 GW, an increase of 14% from last year (the total installed capacity at the end of 2018 was 115.2 GW). As it continues to rise, some security risks are gradually emerging. Increasing concerns for the safety of photovoltaic systems For photovoltaic systems, there are two major...