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Power system stability calculation method

A technology of power systems and calculation methods, applied in the direction of electrical components, circuit devices, AC network circuits, etc.

Active Publication Date: 2016-02-17
SHENYANG AIRCRAFT DESIGN INST AVIATION IND CORP OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, with the large increase in the use of power systems, power systems must supply power to different types of static and dynamic loads, which brings great challenges to power generation, power conversion, and power transmission.

Method used

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Embodiment Construction

[0032] In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below in conjunction with the drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of the invention. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention. Embodiments of the present invention will be described in detail below ...

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Abstract

The invention relates to the technical field of the design of an airplane power system, particularly to a power system stability calculation method, which can judge the stability of a power system in time according to a calculation result. The calculation method comprises the following steps: modeling a pretested onboard power system to obtain a corresponding characteristic circuit; according to the characteristic circuit, listing a non-linear expression; according to a small signal stability analysis method, linearizing the nonlinear expression by surrounding a predetermined steady-state operation point to obtain a spatial state matrix; and according to the characteristic root analysis method, judging the stability of the predetermined steady-state operation point. By adopting the power system stability calculation method, the stability of a fixed power system structure can be high efficiently analyzed, and the stability of the power system after the inductance and capacitance parameters are changed or the load power is changed can be monitored in real time.

Description

technical field [0001] The invention relates to the field of aircraft power system design, in particular to a method for calculating the stability of the power system. Background technique [0002] With the development of the aviation industry, multi-electric aircraft has gradually become a trend due to its advantages of low fuel consumption, high efficiency, high reliability, low cost, and environmental protection. In a more electric aircraft, the electric system replaces the traditional hydraulic system, pneumatic system and mechanical system to drive the various non-propulsion systems on the aircraft. However, with the massive increase in the use of power systems, power systems must supply power to different types of static and dynamic loads, which brings great challenges to power generation, power conversion, and power transmission. Among many loads, when the constant power load (ConstantPowerLoads) appears, it will show negative growth characteristics (NegativeImpedanc...

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Application Information

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IPC IPC(8): H02J3/00
Inventor 那韵奇
Owner SHENYANG AIRCRAFT DESIGN INST AVIATION IND CORP OF CHINA
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