Sub-synchronous/super-synchronous oscillation analysis method and system of power electronic system

A technology for power electronics and oscillation analysis, applied in the direction of reducing/preventing power oscillation, circuit devices, AC network circuits, etc., and can solve problems such as complex mutual influences

Pending Publication Date: 2017-08-22
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology allows for accurate determination of synchronization between different parts (subsystem) within an electric machine's circuitry). It uses specific techniques that can detect changes caused by external influences or other causes affecting its performance. By comparing these results with previous measurements from similar machines it becomes possible to identify any issues related to their operation.

Problems solved by technology

This patented technical problem addressed in this patents relates to the occurrence of both types of oscillating phenomena when connecting generators with grids due to interactions involving different levels of coupling capacitance (C). These effects include instability of voltage regulation during transient conditions like faults, changes in frequency response, and potential damage to other equipment nearby.

Method used

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  • Sub-synchronous/super-synchronous oscillation analysis method and system of power electronic system
  • Sub-synchronous/super-synchronous oscillation analysis method and system of power electronic system
  • Sub-synchronous/super-synchronous oscillation analysis method and system of power electronic system

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Embodiment Construction

[0026] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0027] The subsynchronous / supersynchronous oscillation analysis method and system of a power electronic system according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0028] figure 1 It is a flowchart of a subsynchronous / supersynchronous oscillation analysis method for a power electronic system according to an embodiment of the present invention.

[0029] like figure 1 As shown, the subsynchronous / supersynchronous oscillation analysis method of a power electronic system...

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Abstract

The invention discloses a sub-synchronous/super-synchronous oscillation analysis method and system of a power electronic system. The method comprises: obtaining equivalent sub-synchronous and super-synchronous coupled impedance matrixes of a power electronic system; according to the equivalent sub-synchronous and super-synchronous coupled impedance matrixes, obtaining a determinant criterion; and on the basis of the determinant criterion, detecting stability of the power electronic system and analyzing frequencies and damping values corresponding to the sub-synchronous/super-synchronous oscillation. According to the method disclosed by the invention, the determinant criterion is obtained based on the sub-synchronous and super-synchronous coupled impedance matrixes, the stability of the system is determined based on the determinant criterion, and the frequencies and damping values corresponding to the sub-synchronous/super-synchronous oscillation are analyzed. Therefore, a quantitative analysis of main factors of oscillation of a power electronic system is realized.

Description

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Claims

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Application Information

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Owner TSINGHUA UNIV
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