В статье представлена тепловая процедура на основе метода конечных элементов (МКЭ) для определения длительно допустимых токовых нагрузок подземных кабельных линий на основе концепции эффективной передачи электрической энергии и устранения погрешностей, возникающих в результате неправильного выбора размера домена решения. Описанная процедура (i) представляет собой подробную инструкцию по правильному электрическому и тепловому моделированию элементов конструкции силовых кабелей, (ii) систематизирует существующие концепции для определения требуемых осевых расстояний между соседними кабелями в треугольниках и размерах слоя песчано-гравийной смеси, и (iii) включает в себя все знания, вытекающие из предыдущего опыта применения различных программных решений на основе МКЭ для теплового анализа подземных кабельных линий. При разработке концепции использовались стандарты IEC 60287 и технический отчет IEC TR 62095. Применение предложенной процедуры обсуждается на примере двухконтурной кабельной линии 110 кВ, построенной в Белграде, в Республике Сербии.
Ключевые слова: длительно допустимая токовая нагрузка, двухконтурная кабельная линия, метод конечных элементов, стационарный анализ, тепловое проектирование.
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