摘要
高压交直流叠加输电技术作为一种新的输电方式,无需对现有交流输电线路进行较大改造,可较大程度解决交流输电线路输送容量难以接近其热稳定极限的瓶颈问题,具有一定的应用前景。为进一步推动该技术的发展与应用,分析其主电路结构、直流叠加运行方式,并对Zigzag变压器实现交直流叠加与分离及避免磁饱和的机理进行了分析;研究系统电气叠加比例、输电距离对输送容量的影响特性,并得出系统最优功率传输角与输电距离的关系。建立采用Zigzag变压器的高压交直流叠加输电系统仿真模型,验证了其输电特性的正确性和有效性。
As a new transmission way, without major modifications to the existing AC transmission line, high voltage superposed AC and DC power transmission technique can greatly solve the bottleneck problem that transmission capacity of AC transmission line is hard to approach the thermal stability limit, and it has a good prospect. To further advance the developments and applications of this technology, the main circuit structure and operational modes of DC superposition are analyzed, the mechanism of using Zigzag transformer to achieve superposition and separation of AC and DC, and to avoid magnetic saturation are analyzed in this paper. The transmission characteristics for the effect of superimposed proportion and transmission distance on the transmission capacity are studied, the relationship between optimal power transmission angle and the transmission distance is obtained. The simulation model for high voltage superposed AC and DC transmission with Zigzag transformer is set up to verify the correctness and validity of the transmission characteristics.
出处
《电网技术》
EI
CSCD
北大核心
2015年第9期2597-2605,共9页
Power System Technology
基金
国家自然科学基金重点项目(61233008)~~
关键词
高压交直流叠加输电
Zigzag变压器
磁饱和
输送容量
最优功率传输角
仿真
high voltage superposed AC and DC
Zigzag transformer
magnetic saturation
transmission capacity
optimal power transmission angle
simulation
