Measurement Of Substation Grounding Resistance With Short Leads And Calculation Of Fault Current Distribution

In this thesis, aiming at solving the problems existing in the traditional grounding resistance measurement in substations, and supported by Shanxi electric power research institute, a novel method is proposed to measure the grounding resistance with short leads, and a measurement system based on this method is developed. The measurement system shortens the length of the leads. With the different power frequency method introduced into the measurement system, small current is needed in the measurement process. The measurement system can eliminate the influence of the mutual impedance of the leads, thus highly improve the measurement precision.Solving the fault current distribution is one of the most important tasks in the research of electromagnetic compatibility in power system. Based on the uniform generalized double-sided elimination method, with a novel phase-coordinate transformer model proposed and introduced, a novel method is proposed to solve the fault current distribution in complex power system networks, and a corresponding software kit is developed.Huang Ruifeng (Theory and New Technology of Electrical Engineering)Directed by Prof. Li Lin...