What are the main protective functions of lightning arrester in power system?
Publish Time: 2024-12-26
Lightning arrester, also known as overvoltage protector, is an indispensable safety device in power system. It can effectively protect electrical equipment from damage in high transient overvoltage environment and ensure the stable operation of power system.
The main function of lightning arrester is to release the energy of lightning or power system operation overvoltage, and reduce the overvoltage value of protected equipment by parallel discharge gap or nonlinear resistor to cut the amplitude of intrusive flow wave. This characteristic enables lightning arrester to protect not only atmospheric overvoltage, such as voltage shock caused by lightning, but also operational overvoltage, such as transient overvoltage caused by power system switch operation.
In power system, lightning arrester is usually connected between live wire and ground, and connected in parallel with protected equipment. When the voltage in the line exceeds the action voltage of lightning arrester, lightning arrester will quickly conduct, flow charge, limit the amplitude of overvoltage, and thus protect the insulation of equipment. When the voltage returns to normal, lightning arrester can quickly return to its original state without affecting the normal power supply of the system.
Lightning arrester has a wide range of applications, covering all aspects of power system. Whether it is a power plant, substation, transmission line, or distribution system, the lightning arrester plays a vital role. It can protect key equipment such as transformers, switchgear, and power meter boxes from overvoltage shocks, avoiding equipment damage and power outages caused by overvoltage.
In addition, lightning arresters are available in a variety of types to meet the needs of different scenarios. The protective gap is mainly used to limit atmospheric overvoltage, while the valve type lightning arrester and zinc oxide lightning arrester are more suitable for the protection of substations and power plants. These different types of lightning arresters have their own characteristics and can meet various complex protection needs in the power system.
In general, the lightning arrester plays a vital protective role in the power system. It can effectively limit the amplitude of overvoltage, protect the insulation of electrical equipment, and prevent equipment damage and power outages. With the development of the power system, the performance and types of lightning arresters are also constantly improving and improving, providing a strong guarantee for the stable operation of the power system.
