Neutral-point voltage regulation method for three-phase three-level inverter
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- 上海兆能电力电子技术有限公司
- Publication Date
- 2015-07-01
- Estimated Expiration
- Not applicable · inactive patent
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Abstract
Description
Technical field
[0001] The invention relates to the field of inverter control, in particular to a midpoint voltage adjustment method for controlling a three-phase three-level inverter. Background technique
[0002] Multi-level inverters are suitable for large-capacity and high-voltage occasions, and have been increasingly used. The three-level inverter has a plurality of switching components, and the switching combination of the components is configured as the output voltage of the inverter. The different combinations of the switching states of multiple switching components are set to provide the voltage space vector of the output voltage. With this topology, the maximum voltage that each power switch can withstand is 1 / 2 of the DC side voltage. In addition, due to the phase The voltage has three level states, one more level than the traditional two-level inverter, so the output waveform quality is high. Therefore, this structure converter has a wide range of applications in hi...