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Aircraft power supply system sensitivity analysis and calculation method based on dq transformation

A technology of sensitivity analysis and power supply system, which is applied in the field of sensitivity analysis and calculation of aircraft power supply system based on dq transformation, to achieve the effect of simplifying the calculation and analysis process

Pending Publication Date: 2019-07-19
CIVIL AVIATION UNIV OF CHINA
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Problems solved by technology

[0004] However, at present, sensitivity analysis is only used in power supply systems such as microgrids, and the sensitivity analysis technology used in aircraft power supply systems is still blank.

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  • Aircraft power supply system sensitivity analysis and calculation method based on dq transformation
  • Aircraft power supply system sensitivity analysis and calculation method based on dq transformation
  • Aircraft power supply system sensitivity analysis and calculation method based on dq transformation

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Embodiment Construction

[0022] In order to make the object, technical solution and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0023] Such as Figure 5 As shown, a sensitivity analysis method of aircraft power supply system based on dq transformation, the steps are as follows:

[0024] Step 1) Transform the AC power generation system, inverter, DC part, control link, load, and line in the aircraft power supply system by using the dq transformation theory, and simplify and analyze the circuit by equivalent parameters.

[0025] In a circuit structure containing an alternator and an AC load, it is necessary to establish an equivalent circuit through dq transformation and dq inverse transformation. After transformation according to the formula, assuming that the q-axis circuit input is 0, only the d-axis equivalent circuit needs to be considered to obtain:

[0026] dq tran...

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Abstract

The invention provides an aircraft power supply system sensitivity analysis method based on dq transformation, which comprises the following steps of: establishing an aircraft power system equivalentcircuit according to an aircraft power supply system structure; obtaining a series of nonlinear differential equations according to the established equivalent circuit of the aircraft power supply system, thereby obtaining an A matrix; calculating the characteristic root of the matrix A, selecting the dominant characteristic root, calculating the left and right characteristic vectors of the dominant characteristic root and the derivative of the matrix A on the parameter, calculating the sensitivity according to a formula, and analyzing the influence of the parameter on the stability of the aircraft power supply system. The sensitivity analysis method of the common power supply system is applied to the aircraft power supply system, and the influence of parameters in the aircraft power supplysystem on the stability and the trend can be accurately analyzed. And valuable suggestions are provided for design and improvement of a power supply system in aircraft manufacturing.

Description

technical field [0001] The invention belongs to the technical field of aircraft power supply systems, in particular to a method for analyzing and calculating the sensitivity of an aircraft power supply system based on dq transformation. Background technique [0002] More electric aircraft has become a big trend. Compared with traditional aircraft, more electric aircraft use more power electronic devices to work. Most of the power electronic devices are equivalent to constant power loads and have complex impedance, which will affect the stability of the aircraft power supply system. At the same time, the circuit parameters of the aircraft power supply system It will also affect the stability of the aircraft power supply system, so it is necessary to conduct in-depth research and analysis on the stability of the aircraft power supply system. In the stability analysis of the aircraft power supply system, the eigenvalues ​​and eigenvectors of the aircraft power supply system ar...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 杨占刚卜兆文毕胜蔡进刘建英
Owner CIVIL AVIATION UNIV OF CHINA
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