Method and system for detecting dissipated energy stability of direct-drive permanent magnet wind power system

A technology for dissipating energy and wind power system, applied in wind power generation, electrical components, circuit devices, etc., to achieve real-time detection, comprehensive and accurate detection

Active Publication Date: 2019-10-11
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology

[0004] In view of the above analysis, the present invention aims to provide a method and system for detecting the stability of dissipated energy in a direct-drive permanent ma

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  • Method and system for detecting dissipated energy stability of direct-drive permanent magnet wind power system
  • Method and system for detecting dissipated energy stability of direct-drive permanent magnet wind power system
  • Method and system for detecting dissipated energy stability of direct-drive permanent magnet wind power system

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[0045] Preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the application and together with the embodiments of the present invention are used to explain the principle of the present invention and are not intended to limit the scope of the present invention.

[0046] A specific embodiment of the present invention, such as figure 1 As shown, a method for detecting the stability of dissipated energy of a direct-drive permanent magnet wind power system is disclosed, including the following steps:

[0047] S1, acquiring the operating data of the direct drive permanent magnet wind power system;

[0048] S2, calculating the dissipated energy of the direct drive permanent magnet wind power system according to the operation data;

[0049] S3, performing a stability test on the system according to the energy dissipated by the direct-drive permanent magnet ...

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Abstract

The invention relates to a method and a system for detecting dissipated energy stability of a direct-drive permanent magnet wind power system, and belongs to the technical field of wind power generation. The method comprises the following steps: S1, acquiring operation data of the direct-drive permanent magnet wind power system; S2, calculating dissipated energy of the direct-drive permanent magnet wind power system according to the operation data; and S3, carrying out stability detection on the system according to the dissipated energy of the direct-drive permanent magnet wind power system. The wind power system dissipated energy model of phase-locked loop control, current loop control and parallel SVG control links of a grid-side converter is built; the stability of the direct-drive windpower system is detected on the basis of the dissipated energy model; and the real-time detection of the stability of the wind power grid-connected system is realized.

Description

technical field [0001] The invention relates to the technical field of wind power generation, in particular to a method and system for detecting the stability of dissipated energy of a direct-drive permanent magnet wind power system. Background technique [0002] As the dual pressure of energy crisis and environmental pollution increases, conventional power sources are largely replaced by wind power. On the one hand, the wind turbine continuously weakens the system inertia and damping level; on the other hand, the fast response characteristics of the power electronic converter make the wind turbine and the grid mutually coupled, which induces new broadband stability problems. This caused many synchronous oscillation accidents to occur in the power system. Therefore, an in-depth study on the mechanism of subsynchronous oscillation is urgently needed. [0003] At present, the dynamic characteristics analysis of subsynchronous oscillation of wind power grid-connected system h...

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Application Information

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IPC IPC(8): H02J3/00H02J3/38H02J3/24
CPCH02J3/386H02J3/00H02J3/24H02J2203/20Y02E10/76
Inventor 马静周晓东李沛汪乐天
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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