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发明公开
CN107482613A 一种基于DC/DC隔离模块的变电站直流系统 审中-实审

一种基于DC/DC隔离模块的变电站直流系统
摘要：
本发明公开了一种基于DC/DC隔离模块的变电站直流系统。目前已有的基于DC/DC隔离模块的变电站直流系统，当DC/DC隔离模块故障时将会导致该路直流负荷失去供电，该方案可能还会降低直流系统的可靠性。本发明采用的技术方案为：两面直流主屏进线均通过断路器与一套充电装置及一套蓄电池组相连接；所述的两面直流主屏间采用母联开关相连接；所述两面直流主屏各路出线均安装DC/DC隔离模块，再通过断路器与各面直流分屏进线相连接；各面直流分屏出线通过断路器再与各直流负荷相连接。本发明使接地故障影响范围被限制在该直流负荷所在的直流分屏内，能够有效提高直流系统可靠性及接地故障点查找效率。
摘要（英）：

The invention discloses a transformer station DC system based on a DC/DC isolation module. A conventional transformer station DC system based on the DC/DC isolation module will cause the power failure of a DC load on the same line when the DC/DC isolation module has a fault, and may cause the decrease the reliability of a DC system. The technical scheme of the invention is that incoming lines of two-side DC main screens are respectively connected with a charging device and a storage battery pack through a circuit breaker; two-side DC main screens are connected through a bus switch; each outgoing line of the two-side DC main screens is provided with an DC/DC isolation module, and is connected with the each incoming line of the two-side DC main screens through the circuit breaker; each outgoing line of the two-side DC main screens is connected with each DC load through the circuit breaker. The system enables a grounding fault influence range to be limited in a DC branch screen where the DC load is located, and can effectively improve the reliability of a DC system and the searching efficiency of a grounding fault point.

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