Analysis And Preventive Measures of Abnormal Wire Loss Caused By Wrong Measurement Information

This paper is based on an instance happened in a 10kV on-grid hydropower station, the file information was not corrected in the marketing business system in time after the staff replaced the CT on site, resulting in the inconsistency of CT transformation ratio and measurement magnification between the site and the system, leading to an abnormal on-grid electricity and 10kV wire loss. This paper analyzes the change regularity of the measurement data before and after replacing the CT, combines the error theory, uses the correction coefficient method and the relative error method, calculates the refunded and replenished electricity respectively, analyzes the abnormal wire loss caused by the inconsistent measurement magnification, and puts forward detailed preventive measures to prevent various risks effectively.