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The behavior of a high-current, low-voltage DC system is studied. The DC system is made up of superconducting cables connected in a meshed configuration. The system could be made up of several large rectifiers feeding hundreds of small inverters connected to points in one or more AC systems. A unique aspect of this superconducting configuration is power transmission, at the optimal generator voltage level. This voltage level is also close to the subtransmission system voltage, eliminating the need for high-voltage insulation and transformers. A reduced system with one rectifier feeding three inverters is studied. The ability to control the output power from the inverters, both locally and globally, is demonstrated. Power control on the circuit with the addition of a superconducting magnetic energy storage coil is also studied. The large inductance of the coil changes the dynamic response of the system and requires a modification of the control system.>
Johnson et al. (1991) studied this question.