A Method for Identifying Abnormity of Power Grid Voltage Measurement Based on Distance Correlation Coefficient

As an important front-end acquisition equipment for substation protection, control and measurement, voltage transformer's voltage transmission characteristics determine the accuracy of electricity charge measurement, the validity of substation voltage qualification rate and line loss rate calculation. In this paper, a method based on distance correlation coefficient is proposed to identify the abnormal state of voltage measurement in substation. At the same time, it can realize no power failure, no maintenance and no hardware installation. By using the existing grid voltage data, the slight abnormality of voltage transformer measurement can be found in advance, and the recognition accuracy can be improved.