Testing Impedance Characteristics

This paper presents a methodology to test Mho and Quadrilateral impedance characteristics. The methodology includes test criteria, selection of test points, and test conditions. This work also explores the challenges of selecting test voltages and currents considering impedance element directionality, current magnitude supervision, and test equipment capacity limitations. The calculations of voltage and current quantities in pre-fault, fault, and reset states are shown for each test point. The proposed methodology is implemented using Linear Ramp and Pulsed Linear Ramp algorithm. Finally, the test results are discussed, and recommendations are made.