摘要
自2008年冰灾后,南方电网在西电东送主网架输电通道中加装了6套直流融冰装置,其中高肇直流高坡站直流融冰装置为南方电网首套高压直流输电线OPGW融冰装置。现有的研究工作大多只涉及线路两侧未安装融冰短接刀闸情况下相线融冰技术的研究与计算,实际上,地线覆冰是仅次于相线覆冰的影响系统冰期安全运行的因素,融冰短接刀闸的装设能够大大提高融冰效率。在此背景下,笔者介绍了6套直流融冰装置特别是高坡站OPGW直流融冰装置的概况,分析了基于覆冰预警系统的直流融冰工作流程及安装融冰短接刀闸前后的融冰效率。最后,对分析结果进行了总结,指出OPGW融冰具有可行性和必要性,并建议制定工作流程、加装融冰刀闸以提高融冰效率。
The China Southern Power Grid （CSG） has installed 6 sets of DC deicers on its backbone transmission grid since the ice disaster in 2008, among which the DC deicer in Gaopo substation of Gao-Zhao ±500 kV DC transmission lines is the first OPGW deicer in CSG. Most of the existing DC deicing researches concern the analyses of provincial power grid and transmission lines. However, the icing on overhead ground lines has become the secondary influencing factor in the causation of power system fault in winter. In this paper, the above 6 sets of DC deicers are described with emphasis on the OPGW deicer, and the deicing process and efficiency after the installation of deicing switches are analyzed. The feasibility and necessity of OPGW deicing is discussed, and suggestion of making a DC deicing process and installing deicing switches is offered to improve deicing efficiency.
出处
《高压电器》
CAS
CSCD
北大核心
2013年第6期86-92,98,共8页
High Voltage Apparatus
