(1)Heavy winds and rain: typhoons and rainstorms are the most common causes of power outages.
(2)Lightning: if lightning strikes power equipment, transmission towers, power lines and poles, blackouts may occur.
(3) external damage: vehicle collision poles or construction excavation damage to underground cables, etc. may cause blackouts.
(4) Theft: When an operating power line is stolen, it will result in a power outage.
Expanded Information
Causes of Power System Failures
The power system consists of generators, transformers, busbars, transmission and distribution lines, and power-using equipment. The electrical components and systems are usually in normal operating conditions, but may also be faulty or abnormal operating conditions. With the increasing size of the power system, the structure is more and more complex, fault generation is inevitable. And in the whole process of power production, the most frequent, the most serious danger of failure is the short-circuit fault.
Short-circuit faults occur due to aging of electrical equipment insulation materials or mechanical damage, overvoltage caused by lightning strikes, natural disasters caused by the tower down or broken line, birds and animals across the wire caused by short-circuit, operating personnel misuse, etc., to the safe operation of the power system has brought some new problems.