A LVRT Technique Compensate Negative-sequence Reactive Power
碩士 === 國立中山大學 === 電機工程學系研究所 === 104 === Inverter-based distributed generation and related power quality problems have received much attention in recent years. Low-voltage ride-through (LVRT) is becoming mandatory in low-voltage system due to both security requirement and power-quality consideration....
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| Format: | Others |
| Language: | zh-TW |
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2015
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| Online Access: | http://ndltd.ncl.edu.tw/handle/n382k6 |
| Summary: | 碩士 === 國立中山大學 === 電機工程學系研究所 === 104 === Inverter-based distributed generation and related power quality problems have received much attention in recent years. Low-voltage ride-through (LVRT) is becoming mandatory in low-voltage system due to both security requirement and power-quality consideration. This thesis presents a LVRT strategy for grid-connected inverter to support grid voltage and improve power quality under voltage sag. The proposed inverter is able to inject positive-sequence reactive power to boost voltage and compensate negative -sequence reactive power to suppress negative-sequence voltage according to percentage of voltage sag. Control algorithm and design consideration are presented. Preliminary experiments from lab-scale prototype are provided to validate the effectiveness.
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