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Comprehensive Application Solution for Power Lightning Arrester

Article Source：Kinri Energy | Author：Kinri Energy | Issuing Time：2024.03.22
Power lightning arrester, also known as surge protector (SPD), is a device designed specifically to suppress transient overvoltage on power lines. It protects electrical equipment from overvoltage damage caused by lightning strikes, switch operations, power grid faults, etc. by limiting the amplitude and duration of surge voltage. Power lightning arrester is an indispensable safety protection device in modern power systems, playing a crucial role in the power system.



1.Industry solutions

According to different application scenarios, power lightning arresters can provide various industry solutions, such as:

Building lightning protection: provides comprehensive power lightning protection for various civil, commercial, and industrial buildings, ensuring the safe operation of building electrical equipment.

Solar photovoltaic system lightning protection: We provide professional lightning protection solutions for photovoltaic power stations, modules, and other photovoltaic systems to ensure stable power generation of the photovoltaic system.

Petrochemical Lightning Protection: Targeting flammable and explosive environments in the petrochemical industry, we provide high-performance lightning protection products to ensure the safe operation of petrochemical systems.

Rail Transit Lightning Protection: Targeting the power supply system of rail transit systems, providing reliable lightning protection to ensure the safe operation of rail transit.

Information and Communication Lightning Protection: Provide comprehensive lightning protection solutions for information and communication systems such as data centers and communication base stations, ensuring the safe and stable operation of information and communication systems.

2.Corresponding national standards

The development, production, and application of power lightning arresters follow relevant national standards to ensure product quality and performance. Common national standards include:

GB/T 17565-2019 General Technical Conditions for Surge Voltage Protectors
GB/T 18121-2009 Technical Specification for Lightning Protection Devices for AC Power Sources
GB/T 19186-2010 "Acceptance Rules for Low Voltage Surge Protectors"
DL/T 594-2016 Technical Guidelines for Lightning Protection of Power Systems

3.Application case of power lightning arrester engineering

Power lightning arresters have been widely used in various industries, and the following are some typical engineering application cases:

A large data center: The data center adopts a multi-level lightning protection system and installs different types of power lightning arresters in key areas such as substations, distribution rooms, and server rooms, effectively protecting the safe operation of information equipment in the data center.

A certain photovoltaic power station: The photovoltaic power station is located in an area with frequent lightning activities. Professional solar photovoltaic system lightning arresters have been installed for photovoltaic modules, inverters, monitoring systems and other equipment, effectively suppressing overvoltage caused by lightning strikes and ensuring the safe power generation of the photovoltaic power station.

A certain petrochemical enterprise: The enterprise has installed high-performance petrochemical lightning protection devices for production equipment, transmission lines, control systems, and other equipment, effectively preventing damage to equipment caused by lightning strikes and overvoltage caused by power grid faults.

A certain high-speed railway: A series of power lightning arresters have been installed along the high-speed railway, effectively suppressing surge voltage caused by lightning strikes and switch operations, ensuring the safe and stable operation of the high-speed railway power supply system.

4.The main parameters of power lightning arrester include:

Rated voltage: refers to the maximum voltage that the power lightning arrester can withstand during normal operation.

Residual voltage: refers to the residual voltage value at the output end of a power lightning arrester under the action of a limited overvoltage.

Current capacity: refers to the maximum instantaneous current value that the power lightning arrester can withstand.

Protection level: refers to the ability of power lightning arrester to suppress surge voltage, divided into three levels: I, II, and III.

5.The working principle of power lightning arrester

The basic working principle of power lightning arrester is to use internal nonlinear components (such as varistors, transformers, etc.) to undergo a sharp change in resistance value under overvoltage, thereby absorbing the energy of surge voltage and limiting it within the range that the equipment can withstand, thereby protecting the safety of electrical equipment.

Specifically, the working principle of power lightning arrester can be divided into the following stages:

Normal working stage: Under normal voltage, the power lightning arrester presents a high impedance state, which does not affect the normal operation of the circuit.

Overvoltage surge stage: When subjected to overvoltage surge, the nonlinear components inside the power lightning arrester quickly reduce resistance and become in a low impedance state, absorbing the energy of surge voltage.

Recovery phase: After the overvoltage disappears, the power lightning arrester returns to a high impedance state and the circuit returns to normal operation.

6.The development trend of power lightning arrester

With the advancement of technology and the continuous development of the power system, power lightning arresters are also constantly developing and improving, showing the following trends:

Intelligence: Traditional power lightning arresters mainly rely on hardware to achieve protection functions, while intelligent power lightning arresters add intelligent components such as microprocessors and sensors, which can monitor lightning activity and power grid status in real time, and make quick responses according to actual situations to achieve more effective protection.

Modular: The modular power lightning arrester modularizes the lightning protection function, making it easy to install, maintain, and expand, and improving flexibility.

Networking: The networked power lightning arrester can be added to the network monitoring system to achieve remote monitoring and management, improving maintenance efficiency.

Environmental protection: With the increasing awareness of environmental protection, power lightning arresters pay more attention to environmental protection in the production process, reducing their impact on the environment.

7.Future prospects of power lightning arresters

With the continuous development of the power system and the advancement of information technology, power lightning arresters will play a more important role. In the future, power lightning arresters will develop in the following directions:

High performance: Continuously improve the key parameters such as residual voltage and current capacity of power lightning arresters to meet higher standards of lightning protection requirements.

Diversified functions: In addition to basic lightning protection functions, it will also have more functions, such as harmonic suppression, overload protection, etc.

Integration: Integrating power lightning arresters with other electrical equipment to form a tighter overall protection system.

As an important guarantee for the safe operation of the power system, power lightning arrester will undoubtedly make greater contributions to the development of the social economy.
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