How to do a good job of power system lightning protection?

As we all know, the impact of lightning currents is huge. In the event of an accident, the loss is unpredictable. In particular, the harm of lightning to the power system, the loss will be irreparable. The most common hazards of lightning to the power system are direct lightning strikes and induced lightning strikes. Direct lightning strikes are the direct lightning strikes on an object. Inductive lightning is a rapidly changing lightning electric field. Electrostatic induction or electromagnetic induction occurs on nearby unclosed conductors. Voltage, a large current on the closed conductor causes a lightning accident. In the face of thunder and lightning damage to the power system we need to take what measures?


The first is to plan early and take precautions. It is necessary to strengthen the professional management and technical supervision of lightning protection overvoltages in all kinds of power grids and power transmission, distribution, and specialised (or regional) districts in power supply areas, and to increase the overhaul and technological transformation of lightning protection facilities for transmission and distribution equipment and take Measures such as the standardized management of transmission and distribution lines effectively prevent the damage caused by overvoltage to the grid equipment.

Followed by a comprehensive inspection of the line. Combining local climate characteristics, comprehensively inspecting the lightning protection facilities of transmission lines, focusing on strengthening grounding device inspection and grounding resistance measurement, and lightning protection grounding excavation inspection, and timely handling of grounding devices and grounding resistance that do not meet the requirements of the regulations, and insulators climbing. If it does not meet the requirements, it must be rectified in a timely manner. Do a good job of measuring the grounding resistance in the distribution area. For the unqualified grounding zone, a solution shall be formulated and replaced in time.


Finally, we must do a good job of installation of low voltage lightning protection devices. The low-voltage surge arrester must be installed at the head end of each outlet of the distribution station area (below the RT insurance) to ensure that all the power distribution equipment in the distribution cabinet can be protected. For the distribution area where the grounding resistance is qualified or eliminated, the installation plan of the low-voltage arrester shall be formulated as soon as possible and the installation shall be organized.


In addition, it is necessary to strengthen the detection of distribution transformer grounding resistance and lightning protection devices, and completely eliminate the discovered damaged lightning protectors, porcelain insulators and various hidden dangers before the thunderstorm season arrives, effectively improving the lightning protection capability of the power grid.

Nowadays, the power system has been applied to various fields of society, covering a wide range of areas. Once a lightning strike is damaged, it is of great harm and heavy losses. Strengthening lightning protection of power systems and power supply facilities is an essential means to protect the power system. Therefore, before lightning strikes, we must do a good job of lightning protection and install corresponding lightning protection devices to ensure safety of the power system.

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