基于电压—时限型遥控单元的10kV架空线路故障自动诊断及隔离系统研究

对基于电压—时限馈线自动化设备的10 kV架空线路故障自动诊断及隔离系统进行了研究,对其逻辑关系及隔离原理进行了论述,并进行了现场模拟试验。试验结果表明由真空开关、10 kV柱上PT以及电压—时限遥控终端单元组成的电压—时限馈线自动化设备,可以利用其自身设定的逻辑关系,实现开关的延时关合和自动闭锁。可有效发现并隔断中性点经消弧线圈接地变电站10 kV分段馈线的故障段,从而为故障点的查找和非故障段的迅速查找创造条件。

Synthesis Scheme for Low Power Designs Under Timing Constraints

To minimize the power consumption with resources operating at multiple voltages a time-constrained algorithm is presented.The input to the scheme is an unscheduled data flow graph (DFG),and timing or resource constraints.Partitioning is considered with scheduling in the proposed algorithm as multiple voltage design can lead to an increase in interconnection complexity at layout level.That is,in the proposed algorithm power consumption is first reduced by the scheduling step,and then the partitioning step takes over to decrease the interconnection complexity.The time-constrained algorithm has time complexity of O(n 2),where n is the number of nodes in the DFG.Experiments with a number of DSP benchmarks show that the proposed algorithm achieves the power reduction under timing constraints by an average of 46 5%.