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A Step-by-Step Identification Method of Condenser Parameters Considering Saturation Effect

An identification method and camera technology, which can be applied to genetic rules, color TV components, TV system components, etc., can solve the problem that the camera identification method does not consider the saturation effect, etc.

Active Publication Date: 2020-06-30
JIANGSU FRONTIER ELECTRIC TECH +2
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Problems solved by technology

[0006] The purpose of the invention is to adjust the parameters of the new generation of large-capacity condensers. In order to determine the model and parameters suitable for power system analysis, a step-by-step identification method for the parameters of the condenser is provided considering the saturation effect. , comprehensively evaluated the influence of the magnetic circuit saturation effect of the condenser body on the parameter identification, and solved the problem that the existing condenser identification methods did not consider the saturation effect

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  • A Step-by-Step Identification Method of Condenser Parameters Considering Saturation Effect
  • A Step-by-Step Identification Method of Condenser Parameters Considering Saturation Effect
  • A Step-by-Step Identification Method of Condenser Parameters Considering Saturation Effect

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Embodiment Construction

[0064] Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0065] figure 1 shows the no-load characteristic curve of the condenser, such as figure 1 As shown, the no-load characteristic curve corresponding to the rated voltage of the condenser just begins to bend. The no-load curve is fitted by formula (2), and the saturation characteristic parameters of the condenser are obtained by fitting as a=0.9258, b=0.0791, n=8.0417. Through formula (2), we can get K in each iteration process G value.

[0066] figure 2 It is a block flow diagram of an embodiment of the step-by-step identification method of the parameters of the condenser taking into account the saturation effect of the present invention. Such as figure 2 As shown, an embodiment of the step-by-step identification method of the parameters of the condenser considering the saturation effect of the present invention includes the following ste...

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Abstract

The invention discloses a step-by-step identification method for parameters of a condenser taking into account the saturation effect, and belongs to the technical field of power system modeling and control. This method uses the idea of ​​step-by-step identification, and uses steady-state measurement to calculate steady-state parameters; uses the measured machine terminal voltage and decoupled voltage and current variables in the transient process to identify transient / sub-transient parameters, which improves the accuracy of the identification results and stability. The sixth-order practical model of the condenser involved in the method takes into account the saturation effect of the magnetic circuit. By solving the sixth-order practical model taking into account the saturation effect, the objective function is established with the principle of least squares, and the crossover probability p c and mutation probability p m The improved genetic algorithm that can be adaptively adjusted realizes the precise identification of the parameters of the condenser.

Description

technical field [0001] The invention belongs to the technical field of power system modeling and control, and in particular relates to a step-by-step identification method for parameters of a condenser taking into account the saturation effect. Background technique [0002] my country's energy resources and loads are distributed in reverse, and high-voltage direct current is mostly used for large-capacity power transmission. At present, my country has put into operation Xiangjiaba-Shanghai, Jinping-Southern Jiangsu, Tianshan-Zhongzhou and other UHV DC circuits. According to the UHV DC design principle, under normal working conditions, the reactive power exchange between the DC converter station and the system is zero, and the DC itself does not provide dynamic reactive power to the system. Therefore, in the dynamic process of system failure, DC needs to absorb a large amount of reactive power from the system. With the in-depth application of large-capacity and long-distanc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/232G06N3/12
CPCG06N3/126H04N23/60
Inventor 刘亚南余建平袁超范立新孙川杨春闫涛
Owner JIANGSU FRONTIER ELECTRIC TECH
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