Abstract: A magnetic gear arrangement includes: a first gear member for generating a first magnetic field, a second gear member for generating a second magnetic field, and a coupling device which provides an arrangement of interpoles between the first gear member and the second gear member. The interpoles couple the first and second magnetic fields to produce a gearing between the first and second gear members. The first gear member has superconducting magnets or coils for generating the first magnetic field and/or the second gear member has superconducting magnets or coils for generating the second magnetic field.

Abstract: A magnetic gear arrangement includes: a first gear member for generating a first magnetic field, a second gear member for generating a second magnetic field, and a coupling device which provides an arrangement of interpoles between the first gear member and the second gear member. The interpoles couple the first and second magnetic fields to produce a gearing between the first and second gear members. The first gear member has superconducting magnets or coils for generating the first magnetic field and/or the second gear member has superconducting magnets or coils for generating the second magnetic field.

Abstract: Distributed generation systems incorporate a distribution network and typically a number of distributed generators. It is possible that power islands may be created in substations incorporating a generator when that substation and generator is isolated from the distribution network by a circuit breaker. A problem arises when the power island is re-connected to the distribution network when the phase of electrical power supply in the previous power island is not synchronized with the power supply on the distribution network. Identifying such an out of phase nature is achieved utilizing application of test reactances, both capacitative and inductive, across the whole distribution network such that such test reactances are substantially unbalanced within a particular substation and in particular a distribution path for a generator so that there is a test reactance load imbalance which will identify out of phase operation and therefore control activation of the circuit breaker.

Abstract: Distributed generation systems incorporate a distribution network and typically a number of distributed generators. It is possible that power islands may be created in substations incorporating a generator when that substation and generator is isolated from the distribution network by a circuit breaker. A problem arises when the power island is re-connected to the distribution network when the phase of electrical power supply in the previous power island is not synchronised with the power supply on the distribution network. Identifying such an out of phase nature is achieved utilising application of test reactances, both capacitative and inductive, across the whole distribution network such that such test reactances are substantially unbalanced within a particular substation and in particular a distribution path for a generator so that there is a test reactance load imbalance which will identify out of phase operation and therefore control activation of the circuit breaker.