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

A technology of mixed measurement and equipment parameters, applied in the field of power system, can solve problems such as inaccuracy

Active Publication Date: 2013-05-22
CHINA ELECTRIC POWER RES INST +1
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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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  • Device parameter online identification method based on multi-section hybrid measurement information
  • Device parameter online identification method based on multi-section hybrid measurement information
  • Device parameter online identification method based on multi-section hybrid measurement information

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Embodiment Construction

[0082] like figure 1 As shown, an on-line identification method of equipment parameters based on multi-section mixed measurement information is improved in that the method includes the following steps:

[0083] (1). Filter the measurement data of multi-section equipment;

[0084] (2). Obtain the device model;

[0085] (3). Judging whether the equipment model is a transmission line or a transformer winding, if it is a transmission line, go to step 4, otherwise go to step 5;

[0086] (4) Identification and estimation of transmission line parameters;

[0087] (5). Identify and estimate the transformer parameters.

[0088] In the step 1, the effective measurement information of the equipment in different time sections is screened according to the measurement quality identifier; the effective measurement information of the equipment in the time section includes two types of PMU phases: node voltage phasors and branch current phasors Measurement and three types of SCADA measurem...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00
Inventor 刘俊姚建国杨胜春杨争林於益军冯树海石飞李峰王勇汤必强王礼文郭晓蕊徐鹏潘玲玲
Owner CHINA ELECTRIC POWER RES INST
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