Apparatus for controlling reactive power in a HVDC system

Details Apparatus for controlling reactive power in a HVDC system Apparatus for controlling reactive power in a HVDC system

1986-08-22

1988-02-23

Beha, Jr., William H.

Electric power conversion systems

Current conversion

Including an a.c.-d.c.-a.c. converter

323209, 363 79, H02J 336

Patent

active

047274662

ABSTRACT:
A power converter apparatus for a DC power transmission system or a frequency conversion system includes a control apparatus that functions such that during the operation of converters, when the output voltage of a constant reactive control circuit reaches the output voltage of a margin angle limited control circuit, a shunt reactor is interrupted or a shunt capacitor is closed, and when the output voltage of the constant reactive power control circuit reaches a control delay angle corresponding to the curve which has a difference .DELTA.Q compared with the curve P-Q at a minimum margin angle .gamma. min, the shunt reactor is closed or the shunt capacitor is interrupted.

REFERENCES:
patent: 4598350 (1986-07-01), Sakai et al.
patent: 4600981 (1986-07-01), Sakai et al.
Direct Current, Sep. 1956, vol. 3, No. 2, p. 55.

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