PCB Rogowski Coil for Electronic Current Transducer

The Electronic Current Transducer has been applied in power system for measurement and relay protection. To improve the stability of transducer and increase the coefficient of mutual induction of Rogowski coil, a novel Rogowski coil, namely PCB Rogowski coil was proposed. First, the relationship between conureuration parameters and electromagnetic parameters were analyzed, and simulated their relationships. Second, the influence of thermal expansion on relative error was analyzed. Third, the Rogowski coil configuration parameters were optimized and the optimum parameters were proposed. At last, frequency character of optimum Rogowski coil was simulated. The configuration parameters were h = 2 mm, b = 50 mm, a = 30 mm, h’ = 0.08 mm, w = 0.8 mm, the mutual-inductance of optimum Rogowski coil is 0.163 × 10-5 H, L = 1.31 × 10-4 H. The conclusion can be drawn from simulation result that the optimum PCB Rogowski coil has enough mutual-inductance so as to adapt small current measurement, and it is easy to manufacture in large quantities. Copyright © 2014 IFSA Publishing, S. L.