Field transition in gas-insulated HVDC systems
Field transition in gas-insulated HVDC systems
复制标题
气体绝缘 HVDC 系统中的现场转换
DOI：
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发表时间：
2017
影响因子：
3.1
通讯作者：
U. Riechert
中科院分区：
文献类型：
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作者：
M. Hering;J. Speck;S. Grossmann;U. Riechert
直流操作气体绝缘系统在满足现代能源传输要求方面发挥着关键作用。通电后，初始静电场转变为电流场，由基于载流子的电导率过程决定。实验结果表明，在长期直流应力作用下，电场分布的变化具有温度依赖性，与单纯基于常规RC模型的计算结果存在明显差异。因此，为了计算直流开关后的瞬态和温度依赖行为，必须考虑基于电荷载流子的传导过程。本文通过实验证明了迄今为止文献中仅靠理论计算得出的结论：外加载流子，特别是负离子，在直流通电后加速了场跃迁。
DC operated gas-insulated systems play a key role in satisfying recent requirements of energy transmission. After energizing, the initial electrostatic field is changing into the electric currents field, which is determined by conductivity processes based on charge carriers. Experimental results show the temperature-dependent effects of the changed field distribution under long-term DC stress and identify clear differences to calculations, which are solely based on conventional RC models. Consequently, charge carrier based conduction processes have to be taken into account in order to calculate the transient and temperature-dependent behavior after DC switch on. This paper proves experimentally, what was solely calculated theoretically in literature so far: additional charge carriers, especially negative ions, accelerate the field transition after energizing with DC.