| Summary: | 碩士 === 國立高雄應用科技大學 === 電機工程系 === 97 === This thesis studies the detail modeling and simulation of multilevel inverter-based Static Synchronous Compensator (STATCOM). The basic structure and operation principle of three different topologies of multilevel inverters, namely diode clamped, capacitor clamped and cascaded H-bridge, are explored. Using selective harmonic elimination (SHE) and sinusoidal pulse width modulation (SPWM) switching modulation techniques to control, and its output voltage waveform characteristics and harmonic contents are analyzed. In addition, the ATPDraw is used to build the detailed model of power circuit and controller of the 7-level STATCOM, and then this compensators is connected with a test power system for simulation. From the simulation results, it is confirmed that the multilevel STATCOM has the benefits of high-speed VAR compensation and system voltage stability.
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