Sampling Analysis and Optimization Suggestions on Long Term Operation Metering Performance of Low Voltage Current Transformer

The operation quality of low-voltage current transformer directly affects the accuracy of electric energy measurement. This topic analyzes the metering performance of low-voltage current transformers in long-term operation, puts forward targeted optimization management suggestions, and guides the research on lean management optimization of low-voltage current transformers. This topic first investigates the characteristics of low-voltage current transformers that have been in operation for a long time. After that, this topic focuses on the research on the spot check of low-voltage current transformers, establishes a sampling plan based on Stratified sampling, completes the spot check analysis of 599 low-voltage current transformers, and analyzes and summarizes the influence law of multiple factors such as the unified recruitment mode, operating years, test current, transformation ratio, etc. on the measurement performance change of long-term operating low-voltage current transformers. At the same time, the targeted guiding opinions on the research of lean management optimization of low-voltage current transformers are proposed.