Buck-Boost Dual-Leg-Integrated Step-Up Inverter With Low THD and Single Variable Control for Single-Phase High-Frequency AC Microgrids

By | September 6, 2018

ABSTRACT:

To support the development of high-frequency air conditioning microgrids as far as reduced outline, high-voltage gain and low total harmonic distortion (THD), a buck-boost dual leg-incorporated advance up inverter is proposed in this project. The inverter is framed by coordinating a buck-support converter into an ordinary single-stage full-connect inverter by sharing the upper switch and the body diode of the lower switch in both extension legs. Subsequently, the segment check is altogether diminished over the progression up inverter partners.

Moreover, to address the downsides of mixture tweak techniques embraced by existing dual leg-incorporated inverters, for example, twofold factor control, and high THD of output voltage/current at high information voltage and overwhelming burden conditions, unipolar recurrence multiplying sinusoidal heartbeat width adjustment conspire is received in this inverter. Accordingly, the balance proportion M turns into the main control variable to direct the yield voltage/current and the control is streamlined. The THD of the proposed inverter yield can stay low all through the whole info voltage range and load control go. This paper displays the topology deduction technique, activity guideline, and unfaltering state attributes of the proposed inverter. To approve the viability of hypothesis, trial consequences of a 400 W equipment model, where the yield voltage recurrence is at 500 Hz, are accounted for.

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