Fault-Tolerant Implementation of the SMU with Bad-Data Detection Applied to PMU Values

The need for cost-efficient devices has driven the development of low-cost PMUs, where the SMU was presented as an interesting candidate, considering its flexible program, and the possibility of performing new automation functions based on its different possible reported measurements, as synchrophasors, RMS, DC and Raw Data. On the other hand, the reduced cost has deprived its design of protection and isolation systems, making it especially vulnerable to electromagnetic disturbance, transients, voltage surges, etc. To overcome these problems, a consensus-based fault-tolerant architecture using a technique now standard in space-exploration projects, we plan to bring fault-tolerant characteristics to the SMU, to be able to detect and overcome critical failure in the measurement systems. Finally, we compare a reference PMU, and three different SMUs to the developed consensus to test its operational response.