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

Reactive power control system and control method applicable to wind farm grid-connection point voltage control

A point voltage control and control system technology, applied in flexible AC transmission system, wind power generation, reactive power adjustment/elimination/compensation, etc., can solve the problem of limiting the rapid adjustment response ability of SVC devices, long control cycle, and affecting control effects, etc. question

Active Publication Date: 2014-04-09
STATE GRID CORP OF CHINA +3
View PDF4 Cites 22 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This will cause two problems. One is that each control process needs to collect the information of the fan and SVC, and then perform calculations and issue control commands. Communication delays cause a relatively long control cycle and affect the control effect; Passively receiving commands issued by the AVC system for control greatly limits the ability of the SVC device to quickly adjust and respond to voltage. Third, the reactive power of the fan is frequently adjusted, which affects the safe and stable operation of the fan itself.

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
  • Reactive power control system and control method applicable to wind farm grid-connection point voltage control
  • Reactive power control system and control method applicable to wind farm grid-connection point voltage control
  • Reactive power control system and control method applicable to wind farm grid-connection point voltage control

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0090] like figure 1 As shown, the invention of this example is applicable to the reactive power control system for the voltage control of the grid connection point of the wind farm. The system includes a dispatching system, and the dispatching system is connected to the automatic voltage control (AVC) system of the wind farm. The automatic voltage control of the wind farm The system is respectively connected with the reactive power reference given improved wind farm concentrated reactive power compensation device (SVC), measurement device and wind turbine data acquisition and supervisory control (SCADA) system; the wind turbine data acquisition and supervisory control (SCADA) system and wind power Fans with reactive power regulation capability in the field are connected. The wind farm AVC system communicates and issues commands with the dispatching system, the measuring device, the wind turbine SCADA system and the wind farm concentrated reactive power compensation device (SV...

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 reactive power control system applicable to wind farm grid-connection point voltage control and a reactive power control method applicable to the wind farm grid-connection point voltage control. The system includes a scheduling system; the scheduling system is connected wind a wind farm AVC system; the wind farm AVC system is connected with a wind farm concentrated SVC, a measuring device and a fan SCADA system respectively; and the fan SCADA system is connected with fans in a wind farm. The control method comprises the following steps that: the sequence of reactive power output adjustment performed on the fans by an AVC system is determined according to the sensitivity of wind farm grid-connection point voltage; and the total number of reactive power controllable fans is determined according to whether the reactive power of each fan is controllable or not, such that the upper and lower limits of adjustable reactive power total quantity of the fans can be determined; and reactive power total quantity Qreg of the wind farm, which is required to be adjusted, can be determined, and the Qreg is distributed according to a fan-first and SVC-second reactive power distribution strategy. With the reactive power control system and method applicable to the wind farm grid-connection point voltage control of the invention, the defect of long control cycle of the AVC system in the wind farm can be eliminated, and fast response adjustment ability of the SVC can be given to full play.

Description

Technical field: [0001] The invention relates to a reactive power control system and a control method, and more particularly to a reactive power control system and a control method suitable for the voltage control of the grid connection point of a wind farm. Background technique: [0002] In recent years, under the pressure of energy crisis and environmental pollution, wind power has developed rapidly as a clean and renewable energy source in power generation. With the continuous increase of the installed capacity of wind farms, the safe and stable operation of grid-connected wind farms and their connected regional power grids has been paid more and more attention. The grid connection of large-scale wind power will cause grid voltage fluctuation, especially the voltage fluctuation at the grid connection point of the wind farm is the most prominent. In order to ensure the safe and stable operation of the power grid, the existing national standards and enterprise specificatio...

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): H02J3/18H02J3/38
CPCY02E10/763Y02E10/76Y02E40/10
Inventor 姜达军钱敏慧赵大伟张磊陈宁葛路明罗芳王湘艳朱凌志汪宁渤
Owner STATE GRID CORP OF CHINA
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