李恺,雷浩楠,卜文彬,谭海波,黄红桥,李红斌.一种报文离散性可控的标准数字功率源[J].电测与仪表,2022,59(2):166-170. Li Kai,LEI HAONAN,Bu Wenbin,Tan Haibo,Huang Hongqiao,Li Hongbin.A standard digital power source with controllable discrete value[J].Electrical Measurement & Instrumentation,2022,59(2):166-170.
一种报文离散性可控的标准数字功率源
A standard digital power source with controllable discrete value
Digital electricity meters are widely used in digital substation, and standard digital power source is the main equipment to verify its performance. At present, many digital power source only can output SV message with low randomness, which cannot meet the relevant national and industry standards for the detection of influence quantity of digital electricity meters. Aiming at this problem, this paper designs a random sequence generation algorithm based on chaotic map to ensure the random characteristics of the abnormal message output from standard digital power source. In hardware, the IEC 61850-9-2 sequence is output through the FPGA configuration optical port Ethernet chip, and the chip is configured as the RMII interface output with the smallest time dispersion to ensure that the message dispersion is controllable. The experimental results show that the packet loss probability of the developed digital power source is controllable. The discrete value of the released message time is controllable, and the error is less than 200 ns, which is much smaller than the standard 3 μs. The performance satisfies the detection requirements of the abnormal communication state of the digital electricity meter. The equipment has been used to detect digital electricity meters in China Southern Power Grid.
