Control and Detection of Lon Flow and Space Charge in DCUHV and Compartment Gaslnsulated Transmission Lines

本项目计划研究由DCUHV传输设备产生的空间充电和离子流场检测和控制方法。这个项目的另一个目标是对部分气体的开发进行基本研究-绝缘传输线（C-GIL），因此提议按顺序解决离子流电气化问题。主要结果可能是总结为后续。（1）电场分布沿一个间隔表面是用数值方法计算的。C-GIL对破裂现象的间隔和电极形状的影响被估计为计算结果。（2）一个粒子污染间隔的断裂强度已经通过ribs和金属插入的改进方法进行了测试。（3） Breakdown characteristics and on flow field in high density gas were investigated。它发现了空间充电--经过修改的电气对破坏强度有一个可持续的影响。（4） Apparent mobilities of a positive ion and an electron were measured in cryogenic gaseous helium。发现了一个正离子流动性增加在较低温度下，一个电子气泡在密集氦气体中形成。（5）三个维度问题in ion flow electrification quantities were solved by simulation method to find characteristic time in ion flow electrification and relationship between electrification quantities and parameters of air stream。

This project was planned to study detection and control methods of space charge and ion flow field generated by DCUHV transmission equipments. Another goal of this project was to conduct a basic research on development of compartment gasーinsulated transmission lines (C-GIL), which was proposed in order to solve an ion flow electrification problem. Main results may be summarized as follows.(1) Electric field distribution along a spacer surface was calculated by numerical method. The effect of spacer and electrode shape on breakdown phenomena in C-GIL was estimated according to the calculation results.(2) Breakdown strength of a particle contaminated spacer was tested with improvement methods of ribs and metal insert.(3) Breakdown characteristics and ion flow field in high density gas were investigated. It was found that space chargeーmodified electric had a considerable effect on the breakdown strength.(4) Apparent mobilities of a positive ion and an electron were measured in cryogenic gaseous helium. It was found that the positive ion mobility increased at lower temperatures and an electron bubble was formed in the dense helium gas.(5) Three dimensional problem in ion flow electrification quantities were solved by simulation method to find characteristic time in ion flow electrification and relationship between electrification quantities and parameters of air stream.