О необходимости повышения надежности линейных изоляторов для распределительных сетей 10-20 кВ

Abstract

Статья посвящена выбору конструкций и разработке требований к новым линейным изоляторам для распределительных сетей 6-10-20 кВ, обеспечивающих высокую устойчивость воздушных сетей к грозовым перенапряжениям при прямых и индуцированных воздействиях молнии. Повышение грозостойкости изоляторов позволит сократить перерывы в электроснабжении потребителей и уменьшить электротравматизм персонала электрических сетей при восстановительных работах.The main technical requirements for line post insulators for 10-20 kV distribution lines were formulated. On the 10 kV OL located in areas with increased thunderstorm activity it is recommended to use line post insulators instead of pin-type ones. On the OL-20 kV it is recommended to use only line post insulators. The use of high-lightning-resistant line post insulators on OL-10-20 kV will significantly increase the electrical safety and reliability of power supply to consumers. Increased by 2-3 times the cost of line post insulators in comparison with those used will be compensated for by the effects of reducing the number of collapsible supports, damage from under-supply of electricity, labor costs during transportation and restoration of destroyed supports, the moral side of reducing accidents in case of electric shock in the emergency zone. The insulators offered for OL-10-20 kV can be used for fixing both bare and protected wires. The exclusion from the design of the weakest elements - polyethylene caps and metal pins will increase the reliability of the power isolation unit.