| Abstract:In smart substations, in order to reduce investment and improve data sharing, network sampling is adopted, but the voltage and current information in the network needs to be synchronized in order to achieve functions like differential and distance protection.After the intelligent station process layer networking, various differential protection (such as not out of the substation differential protection, differential protection of the main transformer, outbound line differential protection), single-ended distance protection and power measurement, merging secondary devices such as PMU and fault recorder are newer and higher in sampling synchronization, so the performance of protection depends on time synchronization system in network sampling mode.This paper analyzes the current mechanism of synchronous sampling, Analyzed the problem that may be caused by the abnormality of the synchronization signal, and finally proposed several solutions. |
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