A Novel Approach of Flatness Technique for Control of STATCOM

چکیده مقاله

This paper proposes a new method, called the flatness based control, for STATCOM voltage regulation. By this method, the nonlinear STATCOM variables can be easily and exactly controlled by controlling flat output without solving differential equations. Further, the control gains can dynamically self-adjust during the voltage regulation after a disturbance. Thus, the performance from the flatness-based adaptive control will consistently match a desired response, regardless of the change of operating conditions. In contrast, the traditional PI control and the flatness-based control, even if well-tuned for a specific given operating condition, may be inefficient or incapable to correct voltage when there is a change of the operating conditions or the STATCOM is deployed in a new power system. The advantage of the proposed flatness-based control over the original control are demonstrated with the simulation studies under different operating conditions, such as a change of the equivalent connecting impedance, a change of network

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