The article reveals relevance of the problem of unbalance of line voltages in closed electrical networks with distributed generation as a source of electromagnetic interference, in particular, the problem of electromagnetic compatibility of coastal and ship technical equipment. There is presented mathematical description of the process of occurrence of conductive low-frequency EMF by the voltage unbalance coefficient in the reverse sequence and an algorithm for finding it; using the equations, parameters of this coefficient are described, such as mathematical expectation, standard deviation, probability of occurrence for the billing period, as a result, a computer program has been developed to calculate these parameters; a method for processing the obtained data of power quality indicators according to the found coefficient has been developed; an algorithm for balancing voltages in an electrical network based on finding the most optimal power supply scheme for end consumers (certificate of state registration of an electronic resource No. 23664).
В работе представлена разработка промежуточной опоры для ультракомпактных ВЛ 110 кВ. Технические решения приводятся на примере реконструкции конкретного объекта – ВЛ 110 кВ. Работа выполнена в соответствии с «Техническим заданием на разработку специальных технических условий с использованием провода с защитной изоляцией для воздушных линий электропередачи на напряжение 110 кВ марки СИП-7 с целью уменьшения охранной зоны ВЛ». Выполнен анализ характеристик существующих промежуточных опор типа ПБ 110-4 и промежуточной опоры ВЛ 110 кВ с применением защищённого провода СИП-7. Выбран тип провода для проведения реконструкции линии. Осуществлён расчёт нагрузок на промежуточную опору из композитных материалов типа ПК 110-2 ПЗИ с учётом требований существующей нормативной базы, механический расчёт промежуточной композитной опоры, учитывающий различные климатические воздействия на провода и изоляторы. Предложены конструктивные элементы обеспечения заземления металлических частей опор из композитных материалов и элементы крепления самонесущих изолированных проводов к траверсам композитной опоры.
This paper presents the development of suspension tower for ultra-compact 110 kV overhead lines. Technical solutions performed are based on example of reconstruction of 110 kV overhead line. The research aimed to reduce the security zone of overhead lines by using СИП-7 insulation type cable. The analysis of the characteristics of the existing suspension towers of the ПБ 110-4 type and 110 kV overhead line tower with the use of protected wire SIP-7 is carried out. Authors made the calculation of the loads on the suspension tower made of composite materials of the ПК 110-2 ПЗИ type, taking into account the requirements of the existing regulatory framework, they also carried out the mechanical calculation of the tower, considering various climatic effects on the wires and insulators. Structural elements of providing grounding of metal parts of tower made of composite materials and fastening elements of self-supporting insulated wires to the cross-arms of a tower are proposed.
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