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Vector analysis and control of advanced static VAR compensators

Vector analysis and control of advanced static VAR compensators

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The advanced static VAR compensator (now widely known as the static condenser or STATCON) uses a high power self-commutating inverter to draw reactive current from a transmission line. Two fundamentally different types of invertor can be used for this purpose; one providing control of output voltage magnitude and phase angle, and the other having only phase angle control. For each of these types, the governing equations are derived, and frequency domain analysis is used to obtain the relevant transfer functions for control system synthesis. Further analysis is provided to determine the response of the STATCON to negative sequence and harmonic voltage components on the transmission line. The results are illustrated with measured wave forms obtained from a scaled analogue model of an 80 MVAR STATCON.

References

    1. 1)
      • Gyugyi, L.: `Advanced static VAR compensator using gate turn-off thyristors for utility applications', Paper 23-203, CIGRE, p. 199.
    2. 2)
      • Edwards, C.W.: `Advanced static VAR generator employing GTO thyristors', Paper 38WM109-1, IEEE PES Winter Power Meeting, 1988.
    3. 3)
      • N.G. Hingorani . High power electronics and flexible AC trans mission system. IEEE Power Eng. Rev.
    4. 4)
      • `Development of an advanced static VAR compensator', Contract RP3023-1, .
    5. 5)
      • R.H. Park . Definition of an-ideal synchronous machine and formula for the armature flux linkages. General Electric Review
    6. 6)
      • W.V. Lyon . (1954) , Transient analysis of alternating current machinery.
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