FPGA-based Real-time Detection of Negative Sequence Voltage and Current Components
This paper studies real-time detection of negative sequence components in three-phase power grids encountering asymmetric faults.Aiming at addressing insufficient real-time performance and limited expandability of conventional detection methods,a solution based on field-programmable gate array(FPGA)is proposed.This solution,which utilizes parallel processing capabilities and real-time data processing capabilities of FPGA and combines FGPA with DFT algorithm,has been indicated capable of achieving accurate calculation of negative sequence components in an extremely short duration(5 μs)with a deviation controlled within±0.2%.This solution may facilitate not only improvements in real-time performance and accuracy of negative sequence component detection,but also effective fault diagnosis,protection,and control of three-phase grids.
power systemFPGApositive sequence componentnegative sequence componentzero sequence componentDFT
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