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A Study on Fault Analysis and Protection Principle for HVDC Converter

Author: JiangZuo
Tutor: WangGang
School: South China University of Technology
Course: Proceedings of the
Keywords: DC transmission Converter Failure Analysis Protection
CLC: TM721.1
Type: Master's thesis
Year: 2010
Downloads: 244
Quote: 1
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Abstract


China's power grid is in a period of rapid development , already entered the transition phase from the the Region grid the national interconnected grid with HVDC ( HVDC ) widely used in China , HVDC technology into power sector hot spots. DC protection system design is related to power system safe operation of the core issues of widespread concern . Inverter is key HVDC system , complex and expensive components , the theories and methods of the failure analysis , protection configuration and principle are very different to the traditional system of exchange . The domestic HVDC protection system analysis, design and research also urgent further . Therefore , it is necessary to carry out a detailed analysis of the forms and mechanism of the inverter fault , conduct in-depth study of its protection principle . In this paper, the HVDC system 12 pulse inverter as the research object , the inverter to protect the various district failure mechanism analysis . Considering fault conditions change flow between two 6-pulse inverter failure qualitative analysis and quantitative calculation method . CIGRE standard test system , for example , rectifiers inside and outside the fault calculations. In-depth study of the main protection of HVDC systems ( the inverter valve short circuit protection , commutation failure protection , poor dynamic protection ) protection principle , on this basis , a calculation method based on the areas inside and outside the fault current quantitative , short-circuit of the rectifier valve protection of tuning and sensitivity issues . PSCAD / EMTDC simulation software simulation , based on the the CIGRE DC transmission test system , the short-circuit fault in the inverter short-circuit fault in the region and the District . The results showed that , of the inverter failure analysis theory and method is correct and reasonable analysis and tuning of the HVDC system inverter protection effective and reliable .

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CLC: > Industrial Technology > Electrotechnical > Transmission and distribution engineering, power network and power system > Transmission and distribution technology > Transmission system > DC system power transmission
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