The effect of insulation resistance of overhead insulated conductors on leakage loss is one of the key factors in the safe operation of power systems.
Insulation resistance is a physical quantity that measures the ability of an insulator to prevent the passage of current. In overhead insulated conductors, the size of the insulation resistance directly determines the degree of electrical isolation of the conductor from the external environment.
Insulation resistance is inversely proportional to leakage loss. When the insulation resistance decreases, it is easier for the current to flow through the insulation layer to the external environment, resulting in increased leakage loss. On the contrary, high insulation resistance can effectively reduce leakage loss.
The main reasons for the reduction of insulation resistance include aging, moisture, and damage of insulating materials. These factors will lead to a decrease in insulation performance and make current more likely to leak.
Leakage loss not only leads to energy waste, but also may cause safety accidents such as electrical fires and electric shocks. In addition, long-term leakage loss will accelerate the aging of insulating materials and further reduce insulation resistance.
In order to improve insulation resistance, measures such as selecting high-quality insulating materials, increasing the thickness of the insulation layer, and regularly inspecting and maintaining overhead insulated conductors can be taken. These measures can effectively extend the service life of overhead insulated conductors and reduce leakage loss.
Insulation resistance is an important prerequisite for the normal functioning of leakage protection devices. When the insulation resistance drops to a certain level, the leakage protection device will cut off the power supply in time to prevent leakage accidents.
The insulation resistance of overhead insulated conductors has an important impact on leakage losses. In the future, with the continuous emergence of new materials and new processes, it is expected that the insulation resistance of overhead insulated conductors will be further improved, leakage losses will be reduced, and the safe operation of the power system will be guaranteed.
