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高压电器  2015 

±800 kV特高压直流换流阀避雷器的工况分析及其关键技术的研究

DOI: 10.13296/j.1001-1609.hva.2015.10.016, PP. 103-109

Keywords: ±800kV特高压直流,换流阀,金属氧化物避雷器,过电压保护

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Abstract:

换流阀避雷器是±800kV特高压直流换流站的关键过电压保护设备之一,其技术研究和产品开发是实现特高压直流设备国产化的一个重要课题。笔者在介绍了双12脉动换流阀的工作原理的基础上,分析了换流阀避雷器的稳态应力和暂态应力,提出了阀避雷器的主要技术参数的制定原则。以中国向家坝―上海特高压直流工程为依托,深入研究了±800kV特高压直流换换流阀避雷器的关键技术。最后笔者指出选择合适的荷电率和散热结构是阀避雷器整只设计时必须考虑的关键技术问题,也提出了一种多柱并联电阻片技术,可以为避雷器提供高的比能量吸收能力的技术支持。

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