Lifetime Assessment of PILC Cables with Regard to Thermal Aging Based on a Medium Voltage Distribution Network Benchmark and Representative Load Scenarios in the Course of the Expansion of Distributed Energy Resources

The decentralized feed-ins from distributed energy resources (DER) represent a significant change in the manner which power grid is used. If this leads to high loads on electrical equipment, its aging can be accelerated. This applies particular with regard thermal of older generations cables, namely paper insulated lead covered (PILC) cables. type cable still found frequently medium voltage (MV) networks. these cables significantly accelerated presence DER, distribution system operators (DSO) could face unplanned premature failures and replacement demand costs. Therefore, investigates PILC MV network benchmark for different load scenarios, using standardized profiles representative expansion scenarios wind photovoltaics plants particularly affected areas Germany. A main objective present methodology estimating degradation An approach used draw simplified conclusions loading their conductor or insulation temperature. For purpose, mainly Joule losses are considered. In addition, time constants heating cooling processes. Based temperature, determined Arrhenius law Montsinger rule. However, it important note that there an urgent need research reference data area. reason, results lifetime estimation presented should only considered as approximation if selected literature model actually applicable. assessment performed highly utilized line segment benchmark. Accordingly, extreme values examined. Different operational control strategies DSO limit utilization investigated. show DER short but utilization, although average does not increase increases slightly. lower lifetimes. possible influence temporarily shown by comparing resulting previous situations without DER. It also already reduce excessive preventing overloads few hours year. addition specific results, general findings due obtained, interest congestion management.