Generator dynamic characteristic excitation degree evaluation method based on measurement data quality inspection

A technology for generator dynamics and measurement data, applied in data processing applications, electrical digital data processing, special data processing applications, etc., can solve problems such as lack of actual measurement data verification, and achieve the effect of improving accuracy

Active Publication Date: 2019-12-27
STATE GRID FUJIAN ELECTRIC POWER RES INST +1
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  • Application Information

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Problems solved by technology

Domestic scholars provide theoretical support for the trajectory sensitivity analysis of generator parameters based on the measured disturbance data through simulation analysis of the trajectory sensitivity and average sensitivity characteristics of the generator parameters under various disturbances of the generator, but lack of actual measurement data verification

Method used

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  • Generator dynamic characteristic excitation degree evaluation method based on measurement data quality inspection
  • Generator dynamic characteristic excitation degree evaluation method based on measurement data quality inspection
  • Generator dynamic characteristic excitation degree evaluation method based on measurement data quality inspection

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Embodiment Construction

[0042] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0043] Such as Figure 5 As shown, this embodiment provides a method for evaluating the excitation degree of generator dynamic characteristics based on measurement data quality inspection, including the following steps:

[0044] Step S1: Establish a six-order practical model of a synchronous generator;

[0045] Step S2: Analyze the identifiability of the subtransient parameters of the generator; judge whether the sampling frequency of the measurement data meets the requirements for identifying the subtransient parameters of the generator; Sensitivity equation for the relationship between transient information; if the requirements are met, the subtransient parameters are not identified using measurement data.

[0046] Step S3: By establishing a sensitivity equation for the relationship between the measurement disturbance data and the transient and subt...

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Abstract

The invention relates to a generator dynamic characteristic excitation degree evaluation method based on measurement data quality inspection. The method comprises the following steps: firstly, analyzing generator sub-transient parameter identifiability based on measurement data interval inspection, establishing correlation between a disturbance data sampling interval and excited dynamic characteristics of a generator, and proposing a requirement specification for the real-time performance of PMU device data; and secondly, analyzing the dynamic characteristic excitation degree of the generatorbased on measurement data disturbance depth inspection, and constructing an evaluation system of the dynamic characteristic excitation degree of the generator by establishing a sensitivity equation ofthe relationship between the measurement disturbance data and transient and sub-transient information, thereby realizing the selection of an identification disturbance data band. The effectiveness ofmeasurement data can be effectively identified, and the identification precision of the practical parameters of the generator is improved.

Description

technical field [0001] The invention relates to the field of generator practical parameter identification accuracy, in particular to a generator dynamic characteristic excitation degree evaluation method based on measurement data quality inspection. Background technique [0002] In order to accelerate the refinement modeling of the power system in my country, including the excitation speed control system and the storage of PSS parameters, the work has been improved year by year, but the parameters of the synchronous generator are still simulated and calculated using the nameplate parameters. The accuracy of the parameters of the generator model is an important factor that causes the deviation between the time domain simulation results of the power system and the actual situation, and will directly affect the hidden danger investigation, accident recurrence, safety and stability, and planning and design of the system. In recent years, using the synchronized phasor measurement...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G06Q10/06G06Q50/06
CPCG06Q10/06395G06Q50/06Y02E60/00
Inventor 张伟骏陈伯建张慧瑜黄霆方日升张永树刘智煖苏清梅林芳蔡冰君王文坚杜培黄道姗吴丹岳陈绍君林文彬李兆祥陈宁钱敏慧陈卫东郁琛王松岩胡晓燕
Owner STATE GRID FUJIAN ELECTRIC POWER RES INST
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