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

Fan stepping inertia control improvement method considering frequency response characteristics of synchronous machine

A frequency response, inertial control technology, applied in the direction of single-network parallel feeding arrangement, etc., can solve problems such as difficult practical application, and achieve the effect of avoiding secondary frequency drop and reducing frequency drop.

Pending Publication Date: 2022-04-01
NANJING UNIV OF SCI & TECH +3
View PDF0 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the method of obtaining the optimal output power curve directly through the optimization algorithm and fitting it can only obtain an idealized control strategy for a given system working condition and disturbance, which is difficult for practical application

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
  • Fan stepping inertia control improvement method considering frequency response characteristics of synchronous machine
  • Fan stepping inertia control improvement method considering frequency response characteristics of synchronous machine
  • Fan stepping inertia control improvement method considering frequency response characteristics of synchronous machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0048] In order to solve the problem that the mutual influence between the fan and the synchronous machine is ignored in the existing methods for improving the frequency secondary drop problem, the present invention provides a process of changing the output of the synchronous machine in response to the frequency change after the load event occurs, and in the On this basis, the fan SIC improvement method considering the frequency response characteristics of the synchronous machine is proposed. Through the coordination and cooperation between the fan and the synchronous machine, the whole frequency regulation process is gradually transitioned from the power support dominated by the fan to the power support dominated by the synchronous machine, so as to give full play to the fast power adjustment of the fan and the continuous support ability of the synchronous machine. It has the advantages of effectively avoiding the frequency secondary drop problem during the frequency adjustmen...

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 an improved fan stepping inertia control method considering frequency response characteristics of a synchronous machine, which aims at solving the problem of frequency secondary drop caused by the traditional fan stepping inertia control in a rotating speed recovery stage, fully considers the frequency response characteristics of the synchronous machine, and utilizes the advantages of quick and flexible power output and strong plasticity of the fan to improve the fan stepping inertia control efficiency. The frequency modulation quitting mode is improved; when a frequency event occurs, the active power output of the fan is increased immediately, and the constant power is kept within a certain period of time; and when the frequency reaches the lowest point, the fan power is reduced along with the increase of the synchronous machine power, and the load power vacancy is made up jointly. And the initial power support is further improved while the secondary falling problem is overcome, so that the purpose of reducing the maximum frequency deviation is achieved.

Description

technical field [0001] The invention belongs to the technical field of fan primary frequency modulation control strategies, in particular to an improved method for fan step inertia control considering the frequency response characteristics of a synchronous machine. Background technique [0002] The grid-connected large-scale wind power reduces the inertia level of the grid, and the frequency stability of the grid faces great challenges. Wind turbines usually operate in the maximum power tracking mode, and their rotor speed is decoupled from the grid frequency, and cannot respond to grid frequency changes by adjusting output. In order to maintain the safe and stable operation of the power system, it is urgently necessary for the wind turbine to have a certain auxiliary power grid frequency adjustment function. The frequency modulation method of wind turbines in MPPT mode responding to changes in grid frequency is inertial control, which essentially supports the grid frequenc...

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): H02J3/48H02J3/38
Inventor 陈载宇殷明慧李群李强刘建坤张刘冬方骞周连俊卜京汪成根邹云
Owner NANJING UNIV OF SCI & TECH
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