Analysis and controller design of static VAr compensator usingthree-level GTO inverter |
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Authors: | Cho GC Jung GH Choi NS Cho GH |
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Affiliation: | Dept. of Electr. Eng., Korea Adv. Inst. of Sci. & Technol., Seoul; |
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Abstract: | A static VAr compensator (SVC) using a three-level GTO voltage source inverter (VSI) is presented for high-voltage, high-power applications. The three-level VSI has lower harmonic components and higher DC-link voltage than the two-level VSI and thus can be operated at lower switching frequency (fsw<500 Hz) without excessive harmonic contents. From the DQ-transformed equivalent circuit of the presented SVC system, DC and AC analyses are carried out to find the steady-state and the dynamic characteristics of the system. Based on the open-loop transfer function of the system, a controller is designed to achieve fast dynamic response. The experimental results confirm the theoretical analyses and controller design |
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