含分布式电源的配电系统保护方案  

Relay Protection Scheme for Distribution System with Distributed Generations Source

作　　者：王菁[1] 邵如平[1] 穆秀云[1] 卢卫清[1] 

机构地区：[1]南京工业大学自动化与电气工程学院,江苏南京211816

出　　处：《低压电器》2012年第10期14-17,共4页Low Voltage Apparatus

摘　　要：介绍了分布式电源接入配电系统后,采用基于两相电流差的自适应速断电流保护与无通道保护相配合的方案,即故障发生后先采用自适应速断电流保护。由于自适应速断存在保护死区,故以无通道保护作为后备保护。最后,通过对220 V配电系统进行仿真,验证了该保护方案的有效性。When distributed generation source is connected to the distribution system, it may have some effect on the flow direction and the distribution of short-circuit current in the distribution network as well as its structure. An adaptive instantaneous trip protection based on the phase differential current combined with non-communication protection was proposed. When the fault occurrs, adaptive current instantaneous trip protection is firstly used, and then taking into account the existence of dead zone, non-communication protection is used for back-up protection. The simulation results on a 220 V distribution system verify the validity of the scheme proposed.

关 键 词：分布式电源 两相电流差 自适应速断电流保护 无通道保护 

分 类 号：TM773[电气工程—电力系统及自动化]