The Harm of Lightning Strike to Roof Photovoltaic System
Photovoltaic systems on buildings are more vulnerable to lightning strikes because they are exposed to a large area on the roof of buildings. The unreliable lightning protection system will cause irreversible damage to various parts of the system, as well as other electrical equipment failures.
1. When lightning directly hits the photovoltaic system, high potential and strong current can easily cause large-scale damage to photovoltaic tiles. Photovoltaic tiles will be directly hit by a powerful pulse current, scorching high temperature, and violent electric power, which will lead to the paralysis of the entire system.
2. When the lightning strike is near the building, the high potential caused by it will counterattack the photovoltaic power generation system, which will also cause serious damage. When the voltage invades the battery, it will damage the battery and shorten the service life of the battery, or cause the battery to explode, causing serious system failure and casualties.
3. The high-frequency lightning current is coupled in the large-area photovoltaic array and cables in the form of space electromagnetic wave radiation to generate lightning waves and invade the interior of the photovoltaic building. When the lightning-induced voltage is greater than 1kV, it will destroy the intelligent power generation equipment.
Lightning protection is a systematic project. A complete set of lightning protection systems consists of 6 parts including direct strike protection, equipotential bonding measures, shielding measures, standardized integrated wiring, surge protector protection, and a perfect and reasonable shared grounding system to achieve comprehensive lightning protection. It is a new concept of modern lightning protection. For special buildings such as optoelectronic buildings, it is particularly important to take more effective and active lightning warning and defense measures.
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