Investigation of service aged low voltage distribution cable degradation due to short overloads

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Supervisor:
Dr. Tamus Zoltán Ádám
Department of Electric Power Engineering

The low voltage (LV) distribution cable networks were installed some decades ago but the new paradigm in electric power engineering energy generates new requirements from these old assets. The distributed generation, storage and new appliances can cause high variation of load and reverse power flow, nevertheless the LV cable grid was not designed to these new stresses. The aggregate load and generation can surpass the rated capacity of the cable lines causing short term temperature increasing. This temperature stress can decrease the expected lifetime the cable lines. The aim of the work is to investigate the short term thermal overload of LV distribution. The subjects of the experiments are PVC insulated LV cable samples and the parameters of the core insulation and the cable jacket are investigated. The low voltage (LV) distribution cable networks were installed some decades ago but the new paradigm in electric power engineering energy generates new requirements from these old assets. The distributed generation, storage and new appliances can cause high variation of load and reverse power flow, nevertheless the LV cable grid was not designed to these new stresses. The aggregate load and generation can surpass the rated capacity of the cable lines causing short term temperature increasing. This temperature stress can decrease the expected lifetime the cable lines. The aim of the work is to investigate the short term thermal overload of LV distribution. The subjects of the experiments are PVC insulated LV cable samples and the parameters of the core insulation and the cable jacket are investigated.

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