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Content Provider | IET Digital Library |
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Author | Xu, Chen Dai, Ke Chen, Xinwen Kang, Yong |
Abstract | This study presents a kind of three-phase three-wire double-star-type transformer-less modular multilevel converters (MMCs) in medium-voltage distribution static synchronous compensators (DSTATCOMs) application based on pulse-width-modulated cascaded half-bridge modules. An advanced steady-state analysis for arm current and capacitor voltage is presented to give the explicit converter performance evaluation in project installation. Two key equations based on first and second component equivalent circuits are formulated to obtain the undetermined circulating second harmonic current and actual modulation index. Based on the proposed analysis, the internal active and reactive power control and the external droop control for the voltage at the point of common coupling (PCC) are introduced for MMC-DSTATCOM, respectively. The droop control enlarges the operation area of the converter and the PCC voltage is allowed to vary in a larger acceptable range. Experiment tests acquired from a 60 V/2 kVA prototype in a simplified downscaled power distribution system verify the accuracy of the analysis and the feasibility of the PCC voltage droop control simultaneously. |
Starting Page | 1643 |
Ending Page | 1653 |
Page Count | 11 |
ISSN | 17554535 |
Volume Number | 9 |
e-ISSN | 17554543 |
Issue Number | Issue 8, Jun (2016) |
Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/iet-pel/9/8 |
Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/iet-pel.2015.0728 |
Journal | IET Power Electronics |
Publisher Date | 2016-06-29 |
Access Restriction | Open |
Rights Holder | © The Institution of Engineering and Technology |
Subject Keyword | Apparent Power 2 KVA Arm Current Analysis Capacitor Voltage Analysis Control of Electric Power System Current Control Distribution Network Downscaled Power Distribution System Electric Current Control Equivalent Circuit External Droop Control First Component Equivalent Circuit Internal Active Power Control Internal Reactive Power Control Medium-voltage Distribution Static Synchronous Compensators MMC-DSTATCOM Other Power Apparatus And Electric Machine Point-of-common Coupling Voltage Droop Control Power And Energy Control Power Capacitor Power Conversion Harmonics Power Converter Power Distribution Control Power Supplies to Apparatus Power System Economics Power System Managemen Power System Operation Project Installation Pulse-width-modulated Cascaded Half-bridge Module Reactive Power Control Second Component Equivalent Circuit Static VAr Compensators Steady-state Analysis Three-phase Double-star-type Transformer-less Modular Multilevel Converter Three-wire Double-star-type Transformer-less Modular Multilevel Converter Undetermined Circulating Second Harmonic Actual Modulation Index Undetermined Circulating Second Harmonic Current Modulation Index Voltage 60 V Voltage Control |
Content Type | Text |
Resource Type | Article |
Subject | Electrical and Electronic Engineering |
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