Online identification system of transmission line parameter and identification method thereof

Abstract

The invention relates to an online identification system of a transmission line parameter and an identification method thereof. The technical characteristics are that the online identification system includes a data receiving module, a steady state data processing module and a parameter identification module which are connected in sequence; the data receiving module is for receiving PMU measured data issued by a provincial WAMS system front-end processor in real time, and screening out transmission line telemetry data to be identified; the steady state data processing module is for steady state processing of the transmission line telemetry data output by the data receiving module to remove telemetry bad data and transient state data and generate steady data of a 5-minute section; and the parameter identification module is for accurately identifying and calculating a transmission line parameter using the PMU measured data after steady state processing, taking a result obtained by accurate identification and calculation as a final transmission line steady state identification parameter, and verifying the precision of the transmission line online identification parameter. According to the invention, the parameter of the transmission line operation can be accurately identified, and the identification precision and practicability are high.

Description

technical field [0001] The invention belongs to the technical field of online identification of transmission line parameters in power systems, in particular to an online identification system and identification method for transmission line parameters based on steady-state data processing technology and using PMU measured data to realize online identification of transmission line parameters. Background technique [0002] The country has decided to vigorously promote UHV, and the situation of cross-regional and national networking has formed or will be formed, and the stability of large power grids is becoming more and more important. Power transmission line parameters are the key data of the power grid, which determine the accuracy of all power grid calculations, and are the basis for state estimation calculations, power flow calculations, stability calculations, and protection setting settings. Solving the problem of the accuracy of transmission line parameters aims to solve...

AI Technical Summary

Problems solved by technology

The existing transmission line parameter identification methods are not very ideal because they do not understand the actual measurement data and the mechanism of bad data, although they also use various techniques to improve the accuracy of the data.

In addition, due to the light load of most transmission lines in normal times, the identification error is relatively large

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