Device parameter online identification method based on multi-section hybrid measurement information

Abstract

The invention provides a device parameter online identification method based on multi-section hybrid measurement information. The method includes the steps of firstly, filtering multi-section device measurement data; secondly, acquiring a device model; thirdly, judge whether the device model is a power transmission circuit or a transformer winding, performing the fourth step if the device model is the power transmission circuit, and otherwise, performing the fifth step; fourthly, identifying and estimating power transmission circuit parameters; and fifthly, identifying and estimating transformer parameters. SCADA (supervisory control and data acquisition) measurement information of a scheduling technology support system and phase measurement information of a WAMS (wide area measurement system) are fully utilized to build a hybrid measurement system, suspicious device parameters is estimated through multi-time sections, and identification accuracy of device parameters is improved.

Description

technical field [0001] The invention belongs to the field of electric power systems, and in particular relates to an on-line identification method of equipment parameters based on multi-section mixed measurement information. Background technique [0002] With the continuous development of the automation level of the power grid and the gradual expansion of the power grid scale, the state estimation of the dispatching system puts forward higher requirements for the accuracy of the power grid equipment parameters. Wrong equipment parameters will seriously reduce the calculation accuracy of the state estimation in the local area, and then Affect the work efficiency of subsequent network analysis software. Therefore, the accuracy of power grid parameters has become a bottleneck restricting the reliability of power grid analysis when the accuracy of real-time information (including SCADA measurement and PM U measurement) is getting higher and higher. [0003] In recent years, wit...

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Problems solved by technology

[0006] In order to overcome the above defects, the present invention provides an online identification method of equipment parameters based on multi-section mixed measurement information, which fully utilizes the traditional SCADA measurement information of the scheduling technology support system and the phasor measurement information of the WAMS system to construct a mixed measurement The system, by estimating suspicious equipment parameters through multiple time sections, improves the accuracy of equipment parameter identification, solves the phenomenon that the credibility of state estimation results is reduced due to inaccurate equipment parameters in the power grid model stage, and improves the state estimation calculation of dispatching systems. The accuracy provides good grid model parameters and method data for subsequent analysis software

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