Fault Current Control in the Transmission Network: An Electromagnetic Transient approach

Transmission System Operators (TSO's) are facing an increase of fault current levels in their networks due to the expansion of generation capacity. This thesis investigates three possible fault current limiting measures in the Dutch transmission grid which is operated and maintained by TenneT TSO. In order to evaluate the behavior of the fault current limiting measures, two independently operating grid models were established and validated. The examined fault current limiters consisted of a current limiting reactor (CLR) and a superconducting fault current limiter (SCFCL). The possibility of substation splitting was also investigated. All three measures reduced the short-circuit levels successfully to values within the electromechanical and thermal withstand levels of the power system. Simulation results revealed that the SCFCL has a significantly lower impact on the rate-of-rise-of-recovery-voltage (RRRV) of the circuit breaker (CB) as compared to the CLR. Additional measures were presented to keep the RRRV of the CLR within the dielectric withstand levels of the CB as specified in the IEC 62271-100.

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Embargo date

2014-06-25

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Student theses

Document type

master thesis

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MSc_Thesis_S.A._Franke.pdf

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