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| Content Provider | IET Digital Library |
|---|---|
| Author | Wang, Chenqing Zhang, Chi Kong, Xiangping Li, Peng Yuan, Yubo |
| Abstract | There may be a commutation failure during a fault or start-up of the UHVDC inverter side. The law of commutation failure process in UHVDC converter is studied here. First, the cause of inverter commutation failures is briefly introduced. Then, the general law for the bridge arm conduction of the inverter in the process of the commutation failure is revealed. Finally, the system debugging recorded data of some commutation failures of Taizhou UHVDC inverter in China is used to verify the law. Research shows that the commutation failure will go through three stages which has obvious features: (i) the commutation failure stage, (ii) the bypass circuit formation stage, and (iii) the commutation failure recovery stage. In the last stage, the AC currents of two conducted phases increase instantly in opposite directions, which are easy to recognise. In the second stage, only the DC current increases, and the AC currents equal 0 approximately. Because of the three stages, the commutation failure valve number is easily recognised. The study on the law of commutation failure process lay the foundation for commutation failure process analysis and identification for relay protection. |
| Starting Page | 3132 |
| Ending Page | 3134 |
| Page Count | 3 |
| Volume Number | 2019 |
| e-ISSN | 20513305 |
| Issue Number | Issue 16, Mar (2019) |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/joe/conferences/cn-adc-2018 |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/joe.2018.8451 |
| Journal | The Journal of Engineering |
| Publisher | The Institution of Engineering and Technology |
| Publisher Date | 2018-10-29 |
| Access Restriction | Open |
| Rights License | Creative Commons Attribution-Non Commercial-No Derivs License (http://creativecommons.org/licenses/by-nc-nd/3.0/) |
| Subject Keyword | Commutation Commutation Failure Process Analysis Commutation Failure Recovery Stage Commutation Failure Stage Commutation Failure Valve Number Control of Electric Power System D.C. Transmission Failure (mechanical) Failure Analysis HVDC Power Transmission Identification Inverter Commutation Failure Invertors Maintenance And Reliability Power Converter Power Supplies to Apparatus Power Transmission Control Power Transmission Fault Power Transmission Reliability Relay Protection Reliability Taizhou UHVDC Inverter UHVDC Commutation Failure UHVDC Inverter Side |
| Content Type | Text |
| Resource Type | Article |
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