Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Doubly-fed induction generator parameter identification method

A doubly-fed induction and parameter identification technology, applied in electrical digital data processing, electrical components, circuit devices, etc., can solve problems such as large errors and influence of DFIG parameter identification accuracy, and achieve small parameter influence, high identification accuracy, and improved identification. The effect of precision

Inactive Publication Date: 2016-11-30
HOHAI UNIV
View PDF4 Cites 19 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to propose a new parameter identification method based on the short-circuit current of the stator dq axis as the observation quantity in view of the current problem that the identification accuracy of DFIG parameters is affected by the control link of the converter
The parameter identification method of the doubly-fed induction generator proposed by the present invention performs parameter identification based on the stator dq-axis short-circuit current; the present invention also obtains parameter identification values ​​based on multiple identification results, avoiding the problem of large errors that may be caused by a single identification

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Doubly-fed induction generator parameter identification method
  • Doubly-fed induction generator parameter identification method
  • Doubly-fed induction generator parameter identification method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0033] Below in conjunction with accompanying drawing and specific embodiment the technical solution of the present invention is described in further detail:

[0034] Simulation system such as figure 1 As shown, a DFIG-based wind turbine is connected to an infinite system. The simulation system is built on the Matlab 2013b software platform. All components in the system are taken from the wind farm example that comes with Matlab. The doubly-fed wind turbine adopts the phasor model (phasor model), the parameters of the doubly-fed induction generator are shown in Table 1.

[0035] Table 1 DFIG simulation parameters

[0036] parameter name

value

Rated power / MW

1.5

Rated voltage / kV

0.575

Initial slip / pu

0.2

Stator resistance / pu

0.00706

Rotor resistance / pu

0.005

Stator leakage inductance / pu

0.171

Rotor leakage inductance / pu

0.156

Mutual inductance / pu

2.9

[0037] The structure of dou...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a Doubly-Fed Induction Generator (DFIG) parameter identification method, and belongs to the field of power system modeling. The DFIG parameter identification method comprises the following steps: firstly, determining an analytical expression of stator dq axis short circuit current under a condition of three-phase metal short circuit of a port of a doubly-fed induction generator, and determining parameters to be identified according to the analytical expression; building a single-machine infinite bus system of a doubly-fed wind turbine generator set based on a Matlab / Simulink platform, setting the three-phase metal short circuit at the port of the doubly-fed induction generator, and simulating to obtain a disturbed trajectory of the stator dq axis short circuit current; analyzing the identifiability of each parameter to be identified and the complexity for parameter identification by adopting a trace sensitivity method; and finally, identifying all the parameters to be identified by adopting a particle swarm optimization algorithm, and determining parameter identification values according to multiple identification results. Compared with a method based on active power and reactive power, the doubly-fed induction generator parameter identification method for DFIG parameter identification based on the stator dq axis short circuit current has the advantage that the influence caused by the current transformer control procedure is low; and the parameter identification values are determined according to the multiple parameter identification results, so that the problem of large errors possibly caused by single identification is avoided.

Description

technical field [0001] The invention belongs to the field of power system modeling, in particular to a parameter identification method of a doubly-fed induction generator. Background technique [0002] Modeling is the basis of power system calculation, analysis and operation control. Reasonable and accurate wind turbine model parameters are particularly important for the correctness of the simulation analysis of electromagnetic transients and electromechanical transients in power systems. How to obtain wind turbine model parameters that are closer to reality is a research hotspot in power academia and industry. [0003] When identifying the DFIG parameters of the doubly-fed induction generator, the parameter identification is generally based on the disturbed trajectories of the active power and reactive power of the wind turbine under the port voltage drop. However, due to the strong dynamic coupling between the dynamics of the converter control link and DFIG, the dynamics ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00G06F17/50
CPCG06F30/367H02J3/00H02J2203/20Y02B10/30
Inventor 潘学萍殷紫吟鞠平吴峰金宇清
Owner HOHAI UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products