Compensation scheme for secondary arc current on four-circuit parallel transmission lines

摘要

This study presents a novel capacitive coupling compensation scheme for 500 kV four-circuit transposed parallel transmission lines. Using this scheme, the capacitive coupling between energised phase and faulted phases in four-circuit can be fully compensated. Moreover, the secondary arc current can be limited to <;10 A. On the basis of the new scheme, an optimal compensation scheme for every kind of maintenance state is also depicted. Performances of the proposed schemes are validated by real-time digital simulator.