A transmission line parameter identification method and device based on fault recording data

Abstract

The invention discloses a transmission line parameter identification method based on fault recording data, by first calculating the asynchronous factor between the fault recording data at both ends of the transmission line, and introducing the asynchronous factor into the online parameter identification, compared with In the existing technology, the online parameter identification method is directly applied on the basis of the fault recording data at both ends of the asynchronous line, taking into account the asynchronous factor of the fault recording data at both ends of the transmission line, and then eliminating the asynchronous factor. Influenced by the accuracy of parameter identification, the parameters of the transmission line can be accurately calculated to ensure the normal operation of the monitoring and maintenance work of the power system. The invention also discloses a transmission line parameter identification device, equipment and computer-readable storage medium based on fault recording data, which have the above-mentioned beneficial effects.

Description

technical field [0001] The present invention relates to the technical field of power systems, in particular to a method, device, equipment and computer-readable storage medium for identifying parameters of transmission lines based on fault recording data. Background technique [0002] Transmission line parameters are an important part of the basic data of the power grid, and their correctness directly affects the final calculation of power flow calculation, fault analysis, network loss calculation, relay protection setting calculation, short-circuit current calculation, fault location and selection of power system operation mode. result. If the parameters of the transmission line used in the work are inaccurate, it may have a great impact on the power system, and even cause a major power accident. [0003] The parameters of the transmission line in the power system can adopt the design value or the measured value. Because the actual operating conditions of the transmission ...

AI Technical Summary

Problems solved by technology

Among them, the PMU deployment rate is low, its measurement range cannot cover a large range, and the measurement accuracy is poor when the power grid is faulty, and it cannot be used to identify the zero-sequence parameters of the line; The basic conditions for online parameter measurement applications, and can accurately measure power grid fault data, which can be used to identify zero-sequence parameters of the line

However, the existing online identification and estimation methods of transmission line parameters are mainly proposed based on the synchronous measurement of sampling data at both ends of the line, but the fault recording data cannot meet the data synchronization requirements of the station end. Therefore, the existing The online parameter identification method cannot accurately calculate the line parameters

Images