Flexible unbalanced control with peak current limitation for virtual synchronous generator under voltage sags
| Autor: | Laijun Chen, Shengwei Mei, Yan Guo, Tianwen Zheng |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
TK1001-1841
Engineering 020209 energy Control (management) Virtual synchronous generator Voltage sags TJ807-830 Energy Engineering and Power Technology 02 engineering and technology Permanent magnet synchronous generator Power reference generator Renewable energy sources Generator (circuit theory) Production of electric energy or power. Powerplants. Central stations 0202 electrical engineering electronic engineering information engineering Electronic engineering Current reference generator Renewable Energy Sustainability and the Environment business.industry 020208 electrical & electronic engineering AC power Power (physics) Overcurrent Unbalanced control Current (fluid) business Voltage |
| Zdroj: | Journal of Modern Power Systems and Clean Energy, Vol 6, Iss 1, Pp 61-72 (2017) |
| ISSN: | 2196-5420 2196-5625 |
| DOI: | 10.1007/s40565-017-0295-y |
| Popis: | Virtual synchronous generator (VSG) is grid-friendly for integrating distributed generations (DGs) since it can emulate the operation mechanism of traditional synchronous generator (SG). However, the traditional VSG control strategy, which is mainly suitable for balanced voltage conditions, may lead to power oscillations, current unbalance and even overcurrent under unbalanced voltage sags. To overcome this difficulty, a flexible unbalanced control with peak current limitation for VSG under unbalanced operating conditions is proposed. Based on the basic VSG control algorithm, the control strategy integrates two novel control modules, which are current reference generator (CRG) and power reference generator (PRG). The proposed control strategy can flexibly meet different operation demands, which includes current balancing, constant active or reactive power. And the injected currents are kept within safety values for a better utilization of the VSG power capacity. Furthermore, the experimental platform is built. Experimental results demonstrate the validness and effectiveness of the proposed control strategy. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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