Switching operations in power systems can produce significant overvoltages under specific circumstances. With the increasing application of underground cables in transmission systems, the statistical distribution of energization overvoltages is expected to change substantially due to the different electrical characteristics of cables and OHLs. Therefore, it is crucial to perform an insulation coordination study by analysis of the statistical distribution of energization overvoltages. This paper presents a statistical switching analysis on a hybrid OHL-Cable circuit to investigate how such hybrid circuits can affect the distribution of overvoltages. The literature has addressed the distribution of energization overvoltages only for OHLs or cables, but such an study is not available for hybrid systems consisting of OHLs and cables combined. The study is carried out for different cable lengths in the case study to identify how an increasing cable share in the circuit influences the overvoltages distribution due to no-load energization. Moreover, the impact of symmetrical and asymmetrical circuit structures is also addressed. The study is carried out on a distributed frequency-dependent parameter model of the Dutch 380 kV grid in PSCAD/EMTDC.
Original languageEnglish
Title of host publicationIEEE International Conference on Power Systems Transients (IPST)
Pages1-6
Number of pages6
StatePublished - 2018
EventInternational Conference on Power Systems Transients IPST 2017 - Seoul, Korea, Republic of

Conference

ConferenceInternational Conference on Power Systems Transients IPST 2017
CountryKorea, Republic of
CitySeoul
Period26/06/1729/06/17

    Research areas

  • Cable, energization, insulation coordination, switching overvoltage, statistical switching

ID: 37138529