Abstract
Accidents in power transmission lines under icing conditions, in particular, those of cables, cause a great economic damage in Russia. Because of the lack of the possibility to forecast and evaluate reliably the consequences of weather conditions contributing to icing of transmisison line cables, power grid services often have to go to the place of a potential accident relying on guesswork. This leads to considerable losses of time and material resources, while the average recovery time of a damaged high voltage power transmission line is 5–10 days.For the effective prediction and timely prevention of negative consequences of icing of on power line cables, an analytical model that describes the growth of ice on the surface of the electrical cable has been developed. The model is based on a widely applicable analytical model of [1], supplemented with dependence of the growth of ice sleeve on the angle between the wind direction and the cable, and on the electric field strength of the cable.The results obtained using the new analytical model and the [1], model have been compared and show that as the angle between the wind direction and the cable decreases, the intensity of the ice growth decreases significantly. At the same time, the strength of the electric field of the cable affects negligibly the trajectory of water droplets.A conclusion is drawn about insignificance of electrical field strength of the electric cable as a factor of growth of ice deposits. It is stated that the ice thickness value obtained using the developed model can be increased under specific weather conditions and design parameters of transmission lines. The obtained model can be improved by using other physical effects that affect icing of electric cables. Further, the model can be introduced in operation of energy companies to monitor the condition of power transmission lines and to carry out anti-icing activities.
Highlights
Сравнение результатов, полученных с применением разработанной модели и модели [1] показало, что с уменьшением угла между потоком ветра и проводом интенсивность роста ледяных отложений значительно падает
Because of the lack of the possibility to forecast and evaluate reliably the consequences of weather conditions contributing to icing of transmisison line cables, power grid services often have to go to the place of a potential accident relying on guesswork
This leads to considerable losses of time and material resources, while the average recovery time of a damaged high voltage power transmission line is 5–10 days
Summary
Для эффективного прогнозирования и своевременного предотвращения негативных последствий образования ледяных отложения на проводах ЛЭП разработана аналитическая модель, описывающая рост ледяной муфты на поверхности электрического провода. За основу модели взята широко применяемая аналитическая модель [1], дополненная зависимостью роста ледяной муфты от угла между потоком ветра и проводом и от напряжённости электрического поля провода. Полученных с применением разработанной модели и модели [1] показало, что с уменьшением угла между потоком ветра и проводом интенсивность роста ледяных отложений значительно падает. Что значение толщины стенки ледяных отложений, получаемое по разработанной модели, должно быть увеличено при определённых погодных условиях и конструкционных параметрах ЛЭП. Разработанная модель может быть дополнена другими физическими явлениями, оказывающими влияние на обледенение проводов, и в дальнейшем внедрена в работу энергетических компаний для мониторинга состояния ЛЭП и проведения противогололёдных мероприятий.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
