Connie [1,21 is a general-purpose circuit analysis program which was developed for use in the design of RFX 131, a large reversed-field pinch experiment currently being built at Padua, Italy. The plasma behaviour is on a shorter timescale than the conduction period of the thyristors in the converter power supplies which feed the experiment. approximate converter models were therefore insufficient to predict both the plasma behaviour and the supply line distortion resulting from it.
ExistingThe objectives of the program were as follows:-To simulate the interaction between converters and the complete power supply system. between both the converters and the ac line, and the converters and the load circuit were to be considered. The model had to be detailed enough to simulate the transient behaviour of 12-pulse converter units. The program was to allow easy modification to the circuit being modelled.
InteractionsTo simulate the converters in detail to verify both the converter design and their control system. The program also had to be able to demonstrate the effectiveness of any design improvements.
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