Photovoltaic (PV)/Solar power generation, as another type of renewable clean energy besides wind power generation, is widely used in various regions and countries. It features easy installation, scalability, stability, and long lifespan.
Generally, a photovoltaic power generation system consists of photovoltaic panels, combiner boxes, inverters, distribution cabinets, batteries, and corresponding bus control systems. Internally, it integrates a large number of electrical and electronic devices, all concentrated within a relatively small space. Undoubtedly, lightning strikes and surges are major hazards for photovoltaic power generation systems. EasiTech provides comprehensive and efficient lightning protection solutions for photovoltaic power generation systems.
In accordance with the IEC 62305 series standards and the special requirements of photovoltaic DC systems, the determination of lightning protection zones for photovoltaic power generation systems and the installation and selection of surge protective devices (SPDs) must consider the following:
Lightning protection zones (LPZ 0…3);
Test current waveform conformity of SPDs (8/20 µs waveform and 10/350 µs waveform);
Voltage protection level (especially the UP value of AC-side SPDs);
Open-circuit voltage on the DC side;
Harmonic interference; and more.
References to standards include:
EN 50539-11 “Surge protective devices for photovoltaic systems applications”
IEC 62305 series standards “Protection against lightning”
IEC 61312 “Protection against lightning electromagnetic impulse”
IEC 61643-11 “Low-voltage surge protective devices connected to low-voltage distribution systems”
GB 50057 “Code for Design of Lightning Protection of Buildings”
