Linear Modeling of STATCOM with Design of Current and Voltage Controllers with Variation of DC-Link Voltage
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Abstract
The STATCOM is a shunt connected voltage source converter using self-commutating device and can be effectively used for reactive power control. Its principle of operation is similar to that of a synchronous condenser. This paper describes the linear modeling of STATCOM along with design of current and voltage controllers. The designed controllers with variation of DC-link voltage have been applied to the STATCOM and suitable DC-link voltage has been selected on basis of spike and over shoot of the responses. The values of the passive parameters decided on basis of selected DC-link voltage are used for the design and fabrication of a STATCOM. All responses are obtained through MATLAB SIMULINK tool box and presented here for clarity of the control strategy.
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