Power system stabilizer design method suitable for double-fed draught fan

A technology for stable power system and double-fed fans, which is applied in the fields of instrumentation, calculation, electrical digital data processing, etc., can solve the problems of not considering the characteristics of double-fed fans and the difficulty of guaranteeing dynamic control effects.

Inactive Publication Date: 2014-07-02
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
View PDF3 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the common control method on the rotor side of the doubly-fed fan is the cascade PID active and reactive power decoupling control, but the parameters of the PID controller are set according to the approximate linear model under a certain working condition. Under the condition

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
  • Power system stabilizer design method suitable for double-fed draught fan
  • Power system stabilizer design method suitable for double-fed draught fan
  • Power system stabilizer design method suitable for double-fed draught fan

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0086] The preferred examples will be described in detail below in conjunction with the accompanying drawings. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.

[0087] figure 1 It is a commonly used PID control structure diagram for double-fed fans. Since the present invention is based on the existing communication and control system of the wind farm, there is no need to add additional equipment, and only the following five modifications need to be made to the current wind farm control and communication logic:

[0088] 1. Using the existing RTU equipment, the power grid dispatching center converts the status of each node into a system correlation matrix, and sends it to the wind farm control system through the RTU device.

[0089] 2. The selected state variable enters the filter module to obtain the dynamic deviation signal. The filter module transfer function is: G(s)=sK w / ...

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 power system stabilizer design method suitable for a double-fed draught fan, and belongs to the technical field of the automatic control of new energy power systems. According to the technical scheme, firstly, nodes and lines of the whole network are numbered uniformly to build a system parameter list; secondly, a double-fed draught fan augmented correlation measuring module is built; thirdly, power system stabilizers under all selected operating points are designed; finally, the module switching weight value is computed and the output of a controller is obtained. The output control signals of the system stabilizers are superimposed on traditional system control signals, the traditional operation habits can be kept, and the advantages of being simple to achieve, low in cost are achieved. By the adoption of the power system stabilizers designed according to the method, the disturbance resisting ability and the fault ride-through ability of the wind farm can be improved, the stability of the power grid is improved, and the wind power using ability of the power grid is improved.

Description

technical field [0001] The invention belongs to the technical field of automatic control of new energy power systems, and in particular relates to a design method of a power system stabilizer suitable for double-fed wind turbines. Background technique [0002] In recent years, the new energy power system represented by wind power has become the fastest growing energy source. As more and more large-scale wind farms are connected to the grid, the installed capacity of wind power has reached the point where it cannot be ignored. Theory and practice show that the operating state of wind power, especially the transient state after a power system failure, is directly related to the safe and stable operation of the power grid. Due to its low manufacturing cost and flexible control methods, doubly-fed wind turbines have already dominated the wind farms connected to the grid. At present, the common control method on the rotor side of the doubly-fed fan is the cascade PID active and...

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): H02J3/24G06F19/00
Inventor 牛玉广李晓明赵子昂康俊杰
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap