【作者】 李启瑞；

【导师】 刘健；

【作者基本信息】 西安科技大学 ， 通信与信息系统， 2004， 硕士

【摘要】 针对基于配电自动化开关设备相互配合方式和基于计算机和通信网络方式的自动化系统的不足，提出了本地智能与远程智能相结合的馈线自动化系统方案。在故障情况下，不依赖当时通信网状况，以本地智能的方式进行处理，即通过各FTU相互配合实现故障检测、隔离与非故障区段恢复供电；在电网拓扑结构发生变化时，以远程智能的方式，对FTU的定值进行修改；在正常情况下上传测量参数，以远程智能的方式监测馈线运行状况、实现优化运行。 对基于本地智能与远程智能相结合的馈线自动化系统中的关键设备FTU的若干关键技术进行了研究： 提出了重合器与电压一电流型开关配合方式的重合闸算法，其暂时故障恢复时间短、永久故障处理时只需执行一次重合闸过程，且不需要借助“残压”作为判断条件。 得出了被测信号周期因其同步采样间隔值取整后产生的误差与舍入法之间的对应关系，在此基础上提出了快速同步采样间隔动态调整算法，有效提高了测量精度。 采用CPLD设计了TMS320F206与SJAl000接口电路，实现了非多路复用总线与多路复用总线转换接口。 在基于DSP技术的FTU硬件平台上，实现了上述算法。实验结果表明：故障处理过程与提出的重合闸理论算法相一致；快速同步采样间隔动态调整算法有效地减小同步误差，提高了测量精度，电流、电压的精度从0．5％提高到0．2％，有功功率、无功功率的精度从1％提高到0．5％。更多还原

【Abstract】 Some disadvantages of intelligent switches based Feeder Automation(FA)and computertogether with communication network based FA are pointed out．A new scheme based onlocal intelligence combined with remote intelligence is described．Restoration and isolation offaults are carried out by local intelligence，which is independent of communication．Theremote intelligence is used to automatically shift the setting values of each FTU when thetopology of the Distribution Network(DN)changes．The monitoring and optimal operation ofthe DN are also realized by the remote intelligence． Some key Techniques of a Feeder Terminal Unit(FTU)based on the proposed scheme are investigated． A novel algorithm based on reclosers and voltage-current-mode pole-mounted sw~ches(RVC)based FA is put forward．The time of temporary faults restoration can be greatly reduced．As for permanent fault isolation and restoration，the reclosing procedure is only committed once and the residual voltages are not necessary in the detection of fault as well． The relationship between the error of the cycle of the signal being measured due tointeger conversion of the sampling interval and the round is obtained，based on which，a Dynamic Sampling Interval Adjustment method(DSIA)is deduced．As a result，the accuracy of measuring is effectively increased． The interface circuit between TMS320F206(a non—multiplexed address／data bus)and SJA 1 000(a multiplexed address／data bus)is designed by using complex programmable logic device(CPLD)． The proposed algorithms are realized on the platform of a FTU based on data signal processing microprocessor(DSP)．The experiment results show that the procedures of faulttreatment are in accordance with the design and that by the proposed DSlA the accuracy of voltage and current measurement increase from O．5％to 0．2％and the accuracy of power <WP=4>measurement increase from 1.0％to 0.5％．更多还原