【摘 要】
：
高海拔地区直流输电线路的电晕比低海拔地区更严重,测量和评估输电线路的电晕损耗,对线路设计和经济运行有重要指导意义.因此研制了电晕电流测量装置,并依托特高压技术国家工
【机 构】
：
清华大学电机工程与应用电子技术系电力系统及发电设备控制和仿真国家重点实验室,南方电网科学研究院
论文部分内容阅读
高海拔地区直流输电线路的电晕比低海拔地区更严重,测量和评估输电线路的电晕损耗,对线路设计和经济运行有重要指导意义.因此研制了电晕电流测量装置,并依托特高压技术国家工程实验室(昆明),测量了不同线路结构参数下特高压直流试验线段的电晕损耗,分析了线路结构参数、电压等对电晕损耗的影响,提出了2100m高海拔地区直流输电线路电晕损耗预测经验公式.研究结果表明:电晕损耗随电压的增加呈指数上升;在给定的电压下,双极加压时导线的总电晕损耗远大于单极加压时的损耗;负极导线电晕损耗略大于正极导线电晕损耗;电晕损耗随导线高度的变化不大,随线路极间距的增加而降低.随分裂间距的增加而增加;所提出的经验公式更适合预测高海拔地区(海拔约2100 m)的直流输电线路的电晕损耗.
其他文献
The effects of aging on the microstructure,mechanical properties,intergranular corrosion,and exfoliation corrosion ot an Al-3.5Cu-1.5Li-0.22(Sc + Zr) alloy have
Anode material Li4Ti5O12 was prepared at 800℃ by a solid-state reaction,followed by heat-treatment at 600℃ for different times (0,2,8,and 12 h).The effects of
Entropy generation for thermally developing forced convection in a porous medium bounded by two isothermal parallel plates is investigated analytically on the b
As the fastest integral equation solver to date, the multilevel fast multipole algorithm (MLFMA)has been applied successfully to solve electromagnetic scatterin
A general and efficient parallel approach is proposed for the first time to parallelize the hybrid finite-element-boundary-integral-multi-level fast multipole a
As friction, intrinsic steady-state nonlinearity poses a challenging dilemma to the control system of 3-DOF (three degree of freedom) flight simulator, a novel
To study the Schneiders projection problem,Lutwak,Yang and Zhang recently introduced a new .affine invariant functional U(P) for convex polytopes in Rn.In the p
Three dimensional geophysical models were abstracted and established according to characteristics of oil and gas reservoir. Then direct current fields for diffe
建立四分裂覆冰输电线的面内垂直和扭转两个方向的连续体耦合非线性动力学偏微分方程,利用Galerkin方法将偏微分方程转换为常微分方程.选初始攻角和面内结构阻尼为参数,应用
Various busbar configurations were built and modeled by the custom code based on the commercial package ANSYS for the 500 kA aluminum electrolysis cell. The con