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

Control method and device of restraining sub-synchronous resonance

A technology of subsynchronous resonance and control method, which is applied in the direction of reducing/preventing power oscillation, can solve the problems of subsynchronous resonance and complex characteristics, and achieve the effect of suppressing subsynchronous resonance and ensuring safe and stable operation.

Active Publication Date: 2016-07-20
ELECTRIC POWER RES INST STATE GRID JIBEI ELECTRIC POWER COMPANY +3
View PDF5 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, studies have shown that when doubly-fed wind turbines transmit wind power through series capacitor compensation lines, it may cause serious subsynchronous resonance problems (SSR-Subsynchronous Resonance). Compared with other types of generators, doubly-fed wind turbines The wind farm series compensation transmission system of the dominant unit is more likely to lead to SSR risk
Moreover, the SSR problem in DFIG wind farms is mainly caused by the interaction between the DFIG wind turbine control system and fixed series compensation, and its characteristics are very complex. Wind speed, equivalent series compensation degree, and the number of grid-connected generators and converter control parameters will have an impact on the SSR characteristics, so how to effectively suppress the SSR problem of the DFIG wind farm has not been a good solution

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
  • Control method and device of restraining sub-synchronous resonance
  • Control method and device of restraining sub-synchronous resonance
  • Control method and device of restraining sub-synchronous resonance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] 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 and are intended to explain the present invention and should not be construed as limiting the present invention.

[0030] By adding a subsynchronous damping controller on the stator side or / and rotor side converter of the double-fed fan or introducing an additional damping control link in the control strategy of the converter, and then introducing positive damping to the subsynchronous resonance inside the double-fed fan The additional control volume of the function can effectively suppress the sub-synchronous resonance of the system and ensure the safe and stable operation of the fan and the system.

[0031] combine first figure 1 Understan...

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 present invention discloses a control method and device of restraining sub-synchronous resonance, wherein the method comprises the steps of selecting an input signal of an additional damping controller; determining the access position of the additional damping controller; carrying out the filtering, proportional phase shift and amplitude limiting operations on the input signal to obtain an output control signal; restraining the sub-synchronous resonance of a system according to the output control signal and the access position. According to the method of the present invention, the sub-synchronous resonance of the system is restrained effectively, and the safe and stable operation of a draught fan and the system is guaranteed. The present invention also provides a control device of restraining the sub-synchronous resonance.

Description

technical field [0001] The invention relates to the technical field of power system control, in particular to a control method and device for suppressing subsynchronous resonance. Background technique [0002] In recent years, my country's wind power has continued to develop rapidly, and the scale of wind farms has also continued to expand. Doubly-fed wind turbines are widely used in wind power generation systems due to their flexible control characteristics. The doubly-fed wind turbine (DFIG-Doubly-fedInductionGenerator) uses two back-to-back voltage source converters connected through the DC link for AC excitation. Among them, the converter connected to the DFIG rotor is called the rotor side converter (RSC-RotorSide Convertor), and the control of the RSC can realize the output active and reactive power control of the DFIG stator; the converter connected to the DFIG stator is called the grid side converter (GSC-GridSideConvertor), the control of GSC can keep the DC bus v...

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): H02J3/24
CPCH02J3/24
Inventor 谢小荣刘华坤刘辉李蕴红姜齐荣
Owner ELECTRIC POWER RES INST STATE GRID JIBEI ELECTRIC POWER COMPANY
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

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com