The invention discloses an interactive sampling value
transmission system and a sampling value transmission method thereof. The interactive sampling value
transmission system comprises IEDs (
Intelligent Electronic Device) of spacing
layers and merging units of process
layers, and is characterized in that each merging unit is provided with one or a plurality of sampling value control blocks and defines a
salve clock for each sampling value control block respectively, all the slave clocks are unrelated with each other, and each
slave clock is communicated with each main clocks of the IED of each spacing layer; the IED of each spacing layer defines a
GOOSE control block which internally comprises information related to sampling execution, sampling
start time, number of sampling points and sampling interval; the
GOOSE control blocks can transmit information to the merging units through
GOOSE messages, after receiving sampling value control information of the corresponding IEDs, the merging units control sampling for
electronics mutual inductors at a moment as required to obtain sampling values; and different IEDs of the spacing
layers are associated with the different sampling value control blocks of the merging units for receiving the sampling values of the different sampling value control blocks. As
signal lines between the process layers and the spacing layers are additionally arranged in the interactive sampling value
transmission system, the applications, such as protection, monitoring and the like, to a
transformer substation do not depend on external time setting, and the synchronous precision of sampling can reach a hundred-
nanosecond grade.