The challenge to bring down the cost of produced
photovoltaic (PV) power had a major impact on the PV market
and in consequence the grid operators experienced higher and
higher PV power penetration. The growing share of this
decentralized generation plants started to affect the grid
stability and Distribution System Operators (DSOs) had to keep
the safety and reliability of the network under strict rules and
regulations. The aim of the paper is to realize a survey of recent
Grid Codes (GC) and regulations for grid connected PV
systems. The focus is on grid interface requirements, power
quality concerns and Anti-Islanding (AI) issues regarding PV
systems connected to low voltage (LV) and medium voltage
(MV) levels of the network.