大连城网规划中网架与设备选用原则探讨

Discussion of network frame and facility selection principles in Dalian urban network planning

为城网改造 ,结合大连电业局配电网架实际 ,描述了电缆、架空网 2种网架。电缆网通过几个中心开关站相串接 ,每个开关站从不同变电所的母线或同一变电所的不同母线取得电源。架空线主网架在不同变电所之间 ,用 2～ 3个分段开关握手互连。使用环网柜和电缆相结合的方式解决了原有架空网下地问题。根据高可靠性和高互连性的原则 ,对中低压配电网接线原则做了相关的讨论 ,并就大连配电网提出了选用设备的一些原则。

Combined with the implementation of Dalian power distribution network,the cable network frame and overhead network frame are introduced.Connecting several central switching stations,which are powered by two main lines from different substations or same substation,forms the cable network frame.The overhead network frame connects substations with two or three subsection switches in hand in hand mode.Using the loop network box the original overhead lines are replaced by underground cables.The connecting principle of MV and LV power distribution network is discussed according to the requirement in high reliability and interconnectivity.The principle of facility selection is also presented for Dalian power distribution network.