Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

RSC control-considered analytic method of double-fed wind generator three-phase short-circuit current

A technology of three-phase short circuit and analysis method, which is applied in the field of fault analysis of wind power generation system, and can solve problems such as complex transient characteristics

Active Publication Date: 2018-11-30
KUNMING UNIV OF SCI & TECH
View PDF5 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But on the other hand, the transient characteristics of grid-connected doubly-fed induction wind turbines are quite complicated when the grid-connected voltage suddenly drops, which is different from traditional synchronous and asynchronous motors.

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
  • RSC control-considered analytic method of double-fed wind generator three-phase short-circuit current
  • RSC control-considered analytic method of double-fed wind generator three-phase short-circuit current
  • RSC control-considered analytic method of double-fed wind generator three-phase short-circuit current

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0148] Embodiment 1: as Figure 1-6 As shown, an analytical method for the three-phase short-circuit current of a doubly-fed fan considering RSC control includes the following steps:

[0149] Step 1: According to the equivalent circuit diagram of the doubly-fed induction wind turbine ( figure 1 ) to write the stator and rotor voltage equations, write the stator and rotor flux equations according to the self-inductance flux linkage and mutual inductance flux linkage of the double-fed induction wind turbine stator and rotor, and write the rotor voltage equations according to the RSC control principle, listed above The written equations are all in the dq synchronous rotating coordinate system;

[0150] Step 2: According to the stator voltage equation written in step 1 and the principle of flux conservation, obtain the analytical formula of the stator flux linkage after the fault;

[0151] Step 3: According to the stator and rotor flux linkage equations listed in step 1, the equ...

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 relates to a RSC control -considered analytic method of double-fed wind generator three-phase short-circuit current, belonging to the technical field of wind power generation system fault analysis. The method comprises the following steps: listing a DFIG stator and rotor voltage equation, a stator and rotor flux-linkage equation and a rotor voltage equation of RSC control; determining an analytic expression of stator flux linkage after fault happens; getting a rotor current second order differential equation; further solving the rotor current second order differential equation, and obtaining a RSC control -considered DFIG rotor short-circuit current analytic expression; further obtaining a stator current equation, substituting the stator flux linkage analytic expression and the rotor current analytic expression into the stator current equation, namely obtaining the RSC control -considered DFIG stator short-circuit current analytic expression. The method provided by the invention can accurately calculate the analytic expression of the rotor side converter-considered double-fed induced wind generator three-phase short-circuit current, and has very important significancein model selection and protection action feature analysis of power system equipment containing the double-fed induced wind generator.

Description

technical field [0001] The invention relates to a method for analyzing the three-phase short-circuit current of a doubly-fed fan considering RSC control, and belongs to the technical field of fault analysis of wind power generation systems. Background technique [0002] With the development of the global economy and the substantial increase in energy consumption, the contradiction between energy storage, production and use has become increasingly prominent, and it has become one of the important problems to be solved urgently by countries all over the world. Therefore, in order to solve problems such as energy crisis and environmental pollution, the research and development of new energy sources such as wind energy and solar energy has become a very urgent demand for human beings. Among them, wind energy is a clean and sustainable energy. Compared with traditional energy sources, wind power has the characteristics of not relying on external energy sources, no fuel price risk...

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
IPC IPC(8): G01R31/02G01R29/16G01R31/34F03D17/00G06F17/13
CPCG06F17/13F03D17/00G01R29/16G01R31/343G01R31/346G01R31/50
Inventor 范小红孙士云海世芳王杨张雪娟郑新宇
Owner KUNMING UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Eureka Blog
Learn More
PatSnap group products