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A Parameter Identification Method of Synchronous Generator Based on Trajectory Sensitivity

A trajectory sensitivity, synchronous generator technology, applied in the control of generators, motor generator control, electronic commutation motor control, etc., can solve the problem of transient and sub-transient parameter identification accuracy reduction, reduction of specific gravity, unfavorable parameter identification, etc. problems, to achieve the effect of promoting the practical process and good resistance to poor performance

Active Publication Date: 2019-12-27
STATE GRID FUJIAN ELECTRIC POWER CO LTD +2
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Problems solved by technology

The difficulty of identifying data interval selection is that too long data segments contain too much steady-state data, which reduces the proportion of transient and sub-transient information in the data, which will result in the identification accuracy of transient and sub-transient parameters. The reduction; and too short data segment is likely to lack the required sub-transient and sub-transient information, which is not conducive to parameter identification

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  • A Parameter Identification Method of Synchronous Generator Based on Trajectory Sensitivity
  • A Parameter Identification Method of Synchronous Generator Based on Trajectory Sensitivity
  • A Parameter Identification Method of Synchronous Generator Based on Trajectory Sensitivity

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[0033] The technical solution of the present invention will be specifically described below in conjunction with the accompanying drawings.

[0034] A method for identifying parameters of synchronous generators based on track sensitivity, characterized in that: comprising the following steps,

[0035] Step S1, select the identification data interval based on the trajectory sensitivity:

[0036] S11. Solve the absolute value of trajectory sensitivity in the complete time period|S d (t)|,|S q (t)|;

[0037] S12. Take the steady-state sampling point before the disturbance as the starting point of the identification data interval, that is, from t 0 =0 start, every Δt=4T" d0 Calculate the average of the trajectory sensitivity from the starting point to this point once for the data segment

[0038] S Δt,avg ,S 2Δt,avg ,S 3Δt,avg ...:

[0039]

[0040] Among them, N nΔt for t 0 The number of sampling points in the n·Δt time period;

[0041] S13. When the average value o...

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Abstract

The invention relates to a parameter identification method of a synchronous generator based on the trace sensitivity. The parameter identification problem of the synchronous generator is analyzed through the trace sensitivity, a data interval capable of facilitating improvement of the identification precision is selected, and a complete parameter identification model is proposed based on the solution of the selection problem of the identification data interval. According to the method, good robust performance is achieved, and the practical process of parameter identification of the generator is promoted.

Description

technical field [0001] The invention relates to a parameter identification method of a synchronous generator based on trajectory sensitivity. Background technique [0002] Synchronous generator is one of the core devices in the power system, and the accuracy of its mathematical model has a great influence on the dynamic simulation results of the power system. Due to the lack of actual parameters, most of the synchronous generator parameters used in the current power system analysis and simulation use the data or typical values ​​provided by the manufacturer, or use a simplified model as a last resort, while many dynamic parameters of the synchronous generator are equivalent model parameters, which may vary with The operating conditions of the system vary. At the same time, due to the incomplete data and the influence of actual operating conditions such as eddy current, hysteresis, and saturation, the simulation results obtained by using the parameters provided by the manufa...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/14
Inventor 张伟骏陈文龙林济铿张鑫黄霆黄道姗苏清梅
Owner STATE GRID FUJIAN ELECTRIC POWER CO LTD
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