Control for a force commutated current source var generator

Details Control for a force commutated current source var generator Control for a force commutated current source var generator

1983-06-28

1985-01-29

Wong, Peter S.

Electricity: power supply or regulation systems

For reactive power control

Using converter

323210, 363 96, H02J 318

Patent

active

044968990

ABSTRACT:
The non-linear control characteristic of a force commutated current source inverter operating as a var generator is linearized to provide a similar dynamic response in both leading and lagging modes of operation by two inter-related control schemes. The first control scheme comprises a linear closed loop feedback which controls a thyristor firing circuit in response to a difference or error signal between a var command signal and an actual var feedback signal while the second control comprises a feed-forward non-linear network having a signal transfer function which models the non-linear control characteristic of the var generator and is operative to control the thyristor firing circuit in response to the summation of scaled values of the var command signal and the actual var feedback signal and wherein the scaled values provide a combined gain which is equal to unity.

REFERENCES:
patent: 4019124 (1977-04-01), Moltgen
patent: 4307442 (1981-12-01), Yano et al.
patent: 4352156 (1982-09-01), Gyugyi
"Reactive Power Generation and Control by Thyristor Circuits" by Laszlo Gyugyi, IEEE Transactions on Industry Publications, vol. 1A-15, No. 5, Sep./Oct. 1979, pp. 521-532--see especially 524-525.

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