Overview of development, design, testing and application of compact gas-insulated DC systems up to ± 550 kV
Overview of development, design, testing and application of compact gas-insulated DC systems up to ± 550 kV
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± 550 kV 紧凑型气体绝缘直流系统的开发、设计、测试和应用概述
DOI：
10.1016/j.gloei.2020.01.011
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
D. Li
中科院分区：
文献类型：
--
作者：
Maria Kosse;K. Juhre;M. Kuschel;D. Li
完成了额定电压±550kv的高压直流气体绝缘成套开关柜（DC GIS）的研制。直流GIS提供了一种紧凑的技术解决方案，具有高功能密度，针对空间有限的项目进行了优化，如海上高压直流换流站、陆上高压直流换流站和不同传输介质之间的过渡站。尽管CIGRE内部正在进行预标准化工作，但到目前为止，还没有气体绝缘直流系统的测试标准。一些测试可以按照AC GIS标准的要求进行。直流电压应力的特殊方面，如受电荷载流子积累影响的绝缘子电场分布以及与运行相关的非均匀温度分布，必须通过额外的电和热电试验来考虑。对于DC GIS来说，目前的长期业绩经验有限。尽管预计衰老的重要性较低，但建议进行测试。这篇文章总结了使用气体绝缘技术设计和开发紧凑型直流开关设备组件的物理和技术背景。它解释了变电站的开发模块，并给出了执行测试的概述。此外，它还提供了正在进行的标准化活动的见解，并描述了在换流站和过渡站中的应用，展示了其节省空间的特点。
The development of high-voltage direct current gas-insulated switchgear assemblies (DC GIS) of rated voltages up to ± 550 kV has been completed. DC GIS provide a compact technical solution with a high functional density, optimized for projects with limited space as in offshore HVDC converter platforms, onshore HVDC converter stations and transition stations between different transmission media. Up to now, no standards for testing of gas-insulated DC systems are available, although pre-standardization work is in progress within CIGRE. Some tests can be performed as required in AC GIS standards. Special aspects of DC voltage stress, like the electric field distribution of insulators influenced by the accumulation of electrical charge carriers and the operation-related inhomogeneous temperature distribution, must be considered by additional electric and thermoelectric tests. For DC GIS, the experience of long-term performance is limited today. Although ageing is expected to be of lower importance, tests are recommended. This contribution summarizes the physical and technical background to design and develop compact DC switchgear assemblies using gas-insulated technology. It explains the developed modules of the substation and gives an overview of the performed tests. Furthermore, it provides an insight in the on-going standardization activities and describes applications in converter and transition stations, showing its space-saving characteristics.