Vector analysis and control of advanced static VAR compensators

Abstract

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 waveforms obtained from a scaled analogue model of an 80 MVAR STATCON.

Power Quality Improvement in a Weak Bus System Using Facts Controller

“…The simulated responses with the designed controller parameters are presented. This scheme is both an extension and a significant improvement of the scheme suggested by Shauder et al [16] and Sensarma et al [11].The results obtained have been compared and appropriate conclusions have been drawn.…”

“…With the assumption of the system voltage and STATCOM output voltage are in phase and hence the equation (15) can be modified as given in equation (16). So the equation (16) …”

Modeling and stability analysis of MTDC grids for offshore wind farms: A case study on the North Sea benchmark system

“…1(c) All the converter stations except one was considered to operate in P − Q control mode. Decoupled current control strategy [10] was employed by using the measurable disturbances (i d , i q , E ac and U d P ) as feed-forward terms with appropriate signs. A closed loop BW of 300 rad/s was considered adequate while designing the current controller K I (s) as shown in the Table I.…”

Optimization of PI Controller Gains in Nonlinear Controller of STATCOM Using PSO and GA

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