Controllable DC-link bridge-type FCL for low voltage ride-through enhancement of converter interfaced DG systems
| Autor: | Mehrdad Tarafdar Hagh, Amin Jalilian, Seyed Behzad Naderi, Michael Negnevitsky |
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| Rok vydání: | 2018 |
| Předmět: |
Imagination
Engineering Chemical substance business.industry 020209 energy media_common.quotation_subject 020208 electrical & electronic engineering Electrical engineering Energy Engineering and Power Technology 02 engineering and technology Grid Search engine Distributed generation Fault current limiter 0202 electrical engineering electronic engineering information engineering Transient (oscillation) Electrical and Electronic Engineering Low voltage ride through business media_common |
| Zdroj: | International Journal of Electrical Power & Energy Systems. 95:653-663 |
| ISSN: | 0142-0615 |
| Popis: | Recently penetration level of converter-interfaced distributed generation (DG) systems has been increased in utility and will be more so in the future. To avoid grid instability, converter-interfaced DG should have low voltage ride through (LVRT) capability considering grid codes. An efficient scheme is proposed to enhance the LVRT capability of converter-interfaced DGs. The proposed LVRT technique employs a single phase controllable DC-link bridge type fault current limiter (CD-BFCL), which is placed in DC side of the converter. During normal condition, the CD-BFCL does not affect overall operation of converter-interfaced DG; whereas, during all AC faults including balanced, unbalanced, and transient repeated network faults, converter output AC currents are limited to a desired level. In this way, the converter-interfaced DG is capable to ride through faults even at the zero grid voltage during the AC grid faults. Analytics and modes of operation of the CD-BFCL are presented during switching intervals to demonstrate the efficiency of the proposed approach in limitation of converter over-current. The operation of the proposed method is proved through simulation studies in PSCAD/EMTDC. Also, a laboratory prototype is developed to validate the possibility of practical implementation of the CD-BFCL. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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