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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。
In order to solve the problem that the instantaneous fault handling time of the feeder automation system of the basic closing quick break mode is long and the fault range is enlarged due to overloading, the protection of the power switch of the distribution line is changed to the second reclosing and the sectionalizing switch is used to increase the opening delay function , Effectively improve the instantaneous fault handling speed. Through the segment switch and contact switch, respectively, to increase the loss of pressure lock function, to avoid overloading due to the phenomenon of expanding the fault range. It is pointed out that the X-time limit of the coincidence delay time of the segment switch can be set to the same value. A hierarchical model of the distribution network is established. The principle of setting the closing delay time X_L- Time-bound tuning translates into solving linear programming problems. A complex grid-like distribution network with 6 power supplies and 66 feeder switches is given as an example to verify the feasibility of the proposed method.