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| Content Provider | IET Digital Library |
|---|---|
| Author | Xu, Chen Dai, Ke Chen, Xinwen Kang, Yong |
| Abstract | Unbalanced voltage fluctuation at the point of common coupling (PCC) is a challenging power quality problem in power distribution system. This study presents an unbalanced PCC voltage regulation scheme with positive- and negative-sequence control for modular multilevel converter (MMC) in medium-voltage distribution static synchronous compensator (DSTATCOM) application. The proposed positive-sequence control is utilised to regulate the positive-sequence component of PCC voltage to rated value, while the negative-sequence control aims to cancel out the negative-sequence component of PCC voltage completely. Compensation commands whether in positive- or negative-sequence control are generated from unbalanced PCC voltage without utilisation of unbalanced load currents. DC circulating currents transferring active power among three phases of MMC are also analysed to illustrate power balance issue resulting from negative-sequence control. Then comparison of negative-sequence compensation capacity between MMC and full-bridge cascaded converter with delta-connection is illustrated. Experiment results acquired from a downscaled 85 V/1.5 kVA apparatus validate the effectiveness of the proposed control scheme. |
| Starting Page | 2846 |
| Ending Page | 2858 |
| Page Count | 13 |
| ISSN | 17554535 |
| Volume Number | 9 |
| e-ISSN | 17554543 |
| Issue Number | Issue 15, Dec (2016) |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/iet-pel/9/15 |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/iet-pel.2015.1038 |
| Journal | IET Power Electronics |
| Publisher Date | 2016-12-14 |
| Access Restriction | Open |
| Rights Holder | © The Institution of Engineering and Technology |
| Subject Keyword | Active Power Apparent Power 1.5 KVA Bridge Circuit Compensation Control of Electric Power System DC Circulating Currents Delta-connection Distribution Network Full-bridge Cascaded Converter Harmonics Medium-voltage Distribution Static Synchronous Compensator Application MMC-DSTATCOM Modular Multilevel Converter Negative-sequence Compensation Capacity Negative-sequence Compensation Tactics Negative-sequence Control Other Power Apparatus And Electric Machine Point of Common Coupling Positive-sequence Compensation Tactics Positive-sequence Control Power Balance Issue Power Converter Power Distribution Control Power Distribution System Power Quality Problem Power Supplies to Apparatus Power Supply Quality Power System Control Static VAr Compensators Unbalanced PCC Voltage Regulation Unbalanced Voltage Fluctuation Voltage 85 V Voltage Control |
| Content Type | Text |
| Resource Type | Article |
| Subject | Electrical and Electronic Engineering |
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