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Effects of the HVDC System on Converter Transformers

机译：高压直流输电系统对换流变压器的影响

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摘要

HVDC is a recognized economical and technical advantageous solution for long distance transmission, asynchronous interconnections and long submarine cables crossing. The number of projects already in operation or under consideration has increased in the last years, reflecting the global interest on this technology. The new converter designs have permitted HVDC to be used in a wide system application options, such as underground interconnections and offshore renewable energy generation. HVDC technology presents an economical solution for power transmission, with fewer losses when compared to equivalent high-voltage AC systems. The converters nonlinearity operation produces some effects in the transformers, such as, additional losses, vibration and noise level increase. In many cases, the design solution to deal with those effects is to increase margins, what may affect not only the transformer manufacturing cost, but also its operating life. This article discusses the most relevant effects produced by the line-commutated converters (LCC) technology listed on IEC/IEEE 60076-57-129 technical standard, analyzing the consequences into the converter transformer operation and design considerations.
机译：高压直流输电是公认的经济和技术优势的解决方案，适用于长距离传输，异步互连和海底电缆交叉。在过去的几年中，已经开始运营或正在考虑的项目数量有所增加，这反映了全球对该技术的兴趣。新的转换器设计使HVDC可以在广泛的系统应用选项中使用，例如地下互连和海上可再生能源发电。高压直流输电技术为电力传输提供了一种经济的解决方案，与同等的高压交流系统相比，损耗更少。转换器的非线性操作会在变压器中产生一些影响，例如额外的损耗，振动和噪声水平的增加。在许多情况下，应对这些影响的设计解决方案是增加利润，这不仅会影响变压器的制造成本，还会影响其使用寿命。本文讨论了IEC / IEEE 60076-57-129技术标准中列出的线路换向转换器（LCC）技术产生的最相关的影响，分析了转换器变压器运行的后果和设计注意事项。

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