Method for evaluating validity of SCADA data on the basis of amount of reactive unbalance

Abstract

The invention discloses a method for evaluating the validity of SCADA data on the basis of amount of reactive unbalance. The method is characterized by acquiring the amount of reactive unbalance of both ends of a line by computing according to a voltage amplitude on both ends of the line, a current amplitude of the line, the impedance of the line, and a susceptance-to-ground parameter of the line; and acquiring the amount of reactive unbalance according to the reactive power of SCADA measurement data at both ends. In an ideal case, the computed amount of reactive unbalance is approximately equal to the measured amount of reactive unbalance. If a difference value between the computed amount of reactive unbalance and the measured amount of reactive unbalance is very large, the validity of the SCADA data at that time segment is very low. The method has beneficial effects of using the reactive power of measurement data as an evaluation index to accurately evaluate the validity of the measurement data, thereby accurately finding out data with poor validity in the measurement data and fast removing the data with poor validity.

Description

technical field [0001] The invention relates to the technical field of bad data identification and detection, in particular to a method for evaluating the validity of SCADA (Supervisory Control and Data Acquisition, Supervisory Control and Data Acquisition) measurement data based on reactive power imbalance. Background technique [0002] With the improvement of power system automation level, supervisory control and data acquisition system (Supervisory Control And Data Acquisition, SCADA) is playing an increasingly important role in the power grid. The accuracy of SCADA measurement data directly affects the accuracy of grid state estimation, parameter identification, and online load forecasting. Therefore, SCADA data is playing an increasingly important role in the grid. With the improvement of the measurement accuracy of the power grid, the WAMS system measurement device with phase angle measurement has developed rapidly. Since the PMU measurement device is expensive, it i...

AI Technical Summary

Problems solved by technology

However, this method is relatively complicated and can only be applied to simulation data, and has no practical engineering application value.

[0005] In the prior art, it is also proposed to use PMU and SCADA measurement data to evaluate the validity of the measurement data. However, this method is not suitable for outgoing lines without PMU measurement devices.

Therefore, this method does not have the universality of engineering application

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