横向风对特高压交直流混合线路地面电场与离子流场分布特性的影响  

Influence of Transverse Wind on Ground-Level Electric Field and Ion Flow Profiles of Hybrid HVAC/HVDC Transmission Lines

作　　者：乔骥[1] 路遥 刘增训 邹军[1] QIAO Ji1, LU Yao2, LIU Zengxun3, ZOU Jun1(1. State Key Lab of Control and Simulation of Power Systems and Generation Equipments （Dept. of Electrical Engineering, Tsinghua University）, Haidian District, Beijing 100084, China; 2. China Electric Power Research Institute, Wuhan 430074, Hubei Province, China; 3. State Grid Corporation of China, Xicheng District, Beijing 100031, China)

机构地区：[1]电力系统及发电设备控制和仿真国家重点实验室(清华大学电机系),北京市海淀区100084 [2]中国电力科学研究院有限公司,湖北省武汉市430074 [3]国家电网有限公司,北京市西城区100031

出　　处：《电网技术》2018年第4期1234-1240,共7页Power System Technology

基　　金：电网环境保护国家重点实验室开放基金(GYW51201700589)的资助

摘　　要：在有风条件下,特高压直流与交流并行线路的空间离子流场除受直流电场与交流电场的共同影响以外,还会在横向风力作用下进行新的迁移运动,进而改变地面混合电场的分布特性。采用区域分解法求解横向风存在时的混合场问题,对方法的边界条件和计算流程均进行了改进。结果表明,处于直流线路下风区的直流电场分量横向衰减速率随着风速的增加明显变缓,而上风区的直流电场大幅减小。因此,风速对于混合电场分布的影响程度与交直流线路的相对位置有关。对于同走廊线路,当交流线路处于直流线路下风区时,横向风明显增强了交流线路附近区域内直流分量;而当交流线路处于上风区时,即使风速很小,交直流线路之间的走廊内直流分量也会基本衰减至标称电场。对于同塔线路,由于交直流电场各自的部分特点,横向风不会增强交直流分量的叠加效果。In presence of wind, ion flow from hybrid HVAC/HVDC lines drifts by not only dc and ac electric field force, but also wind force. Therefore, ground-level profile of the electric field will also be shifted. In this paper, domain decomposition method is used to solve hybrid electric field under windy condition. Boundary condition and iteration loop is improved for the case with wind. Results show that downwind dc component decreases significantly slower with wind speed increase, while the values in upwind domain considerably decrease. Therefore, influence of wind is related to ac and dc line location. For hybrid ac/dc lines in the same corridor where ac line is in downwind area, dc component under the ac line significantly increases. When the ac line is located upwind, dc component nearly declines to nominal value even though the wind speed is low. For hybrid ac/dc lines on the same tower, transverse wind has negligible influence on total electric field.

关 键 词：交直流并行输电线路 地面混合电场 离子流场 横向风 区域分解法 

分 类 号：TM86[电气工程—高电压与绝缘技术]