基于SoC的单芯片保护装置架构设计优化

Structure optimization of intelligent substation relay protection device based on SoC

智能变电站对保护安装方式和检测要求提高,原有保护系统存在传输速度慢和架构复杂导致可靠性不高等问题,在此背景下,提出对数据进行分流处理交换,采用k-means算法与业务优先级分层管理技术保证数据实时性,并以FPGA作为通信并行的协处理器,提高处理器和FPGA之间的传输效率。基于以上架构研发出基于k-means算法的电力系统SoC芯片继电保护装置。该装置通过实时数字仿真系统RTDS(RTDS)的故障录波图确定保护装置的动作时间,证明该装置的可靠性和实用性,最后将研发的继电保护装置应用于南方电网部分智能变电站中进行了三年的运行,结果表明其运行可靠稳定,实现保护就地化,装置小型化、高防护、低功耗,达到预期的效果。

The protection installation mode and detection requirements in intelligent substation is enhanced,and the low reliability problem of previous protection system due to the slow transmission speed and the overly complex architecture need to be handled.In this paper,a k-means algorithm-based priority management method is proposed to divide and exchange the data,and to ensure the real-time performance of the data.The FPGA is used as the parallel communication coprocessor to enhance the transmission efficiency to the processor.Thus,a SoC chip protection device is developed.The operation time of the protection device is determined by the fault oscillogram of simulation by the RTDS,which can prove the reliability and practicability of the devices.Finally,the protection device is applied in some substations of Southern Power Grid for three years.The results show that the operation of the device is reliable and stable,the protection can therefore be localized,miniaturized,and the protection and power consumption can also be ameliorated.