全户内变电站主变压器与GIS连接方法研究

Connection Methods of Transformer and GIS in Indoor Substations

全户内变电站中主变压器与GIS之间连接方式的合理选取,是一份优秀的整体设计方案实现的前提条件。对常见的"油—气套管连接"、"主变电缆直连"和"空气套管连接"3种连接方式采用经济技术比较的方法进行了研究。油—气套管连接和主变电缆直连两种方式空间利用率优势明显,但增加了施工、试验、制造和责任分界的难度,需要相关技术的不断进步和经验的积累使方案更加成熟。经济性上,采用电缆连接的方式整体投资更优。经分析,推荐优先选用主变电缆直连或空气套管电缆连接方式。

The reasonable selection of the connection mode between main transformer and GIS is the precondition of an excellent overall design scheme.In this paper,three kinds of connection modes,such as oil-gas bushing connection,transformer-cable directly connection and air bushing connection,are studied by means of economic and technical comparison.Oil-gas bushing connection and transformer-cable directly connection have obvious advantages of space utilization,but they increase the difficulty of construction,test,manufacture and responsibility demarcation,and require the continuous progress of relevant technology and experience accumulation to make the scheme more mature.Economically,the whole investment is better by the way of cable connection.After analysis,it is recommended that the transformer-cable direct connection or air bushing cable connection mode to be preferred.