作　　者： ; ; ;

机构地区： 西安科技大学电气与控制工程学院

出　　处： 《电力系统自动化》 2006年第15期35-39,共5页

摘　　要： 为解决基本合闸速断方式的馈线自动化系统瞬时故障处理时间长和因过负荷而扩大故障范围的问题,将配电线路电源开关保护改为2次重合闸,分段开关增加失压延时分闸功能,有效提高了瞬时故障处理速度。通过分段开关和联络开关分别增加失压闭锁功能,避免了因过负荷而扩大故障范围的现象。指出分段开关的重合延时时间X-时限可以整定为相同值,建立了配电网的分层模型,详细论述了联络开关的合闸延时时间X_L-时限的整定原则,并将X_L-时限的整定转化为线性规划问题求解。给出一个6电源、66馈线开关的复杂网格状配电网作为实例,验证了所提出方法的可行性。 Improvement has been made on solving problems of the basic instantaneous protection based feeder automation, such as the long restoring time for temporary faults and the enlargement of faulty zone isolation due to over load. First, the source switches are designed to be capable of re-closing twice. The duration of temporary fault restoration is considerably reduced by adding a time delay mechanism to the tripping procedure of sectionalizing switches in case of out-of-voltage. The drawback of enlarging the outage zone due to over-load is then avoided by introducing an out-of-voltage lock mechanism into the sectionalizing switches and loop switches, respectively. It is pointed out that the re-closing time delay of sectionalizing switches, i.e., X-time values, can be set at the same value. Moreover, a hierarchical model of distribution network is proposed, on the basis of which the principles of setting the closing time delay of tie switches, i.e. , XL-time, are detailed. A linear planning approach is proposed for setting the XL-time values of loop switches. Finally, a complicated meshed grid with six sources and sixty-six feeder switches is given as an example showing the feasibility of the proposed methods.

关 键 词： 馈线自动化 合闸速断方式 故障隔离 恢复供电 保护 整定

领　　域： [电气工程] [电气工程]