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

Dynamic reactive power optimization method of large-scale alternating current and direct current power system

A power system and optimization method technology, applied in reactive power compensation, reactive power adjustment/elimination/compensation, etc., can solve problems such as poor efficiency, large amount of calculation, and low accuracy

Inactive Publication Date: 2014-12-17
SOUTH CHINA UNIV OF TECH +1
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to provide a dynamic reactive power optimization method for large-scale AC and DC power systems, aiming to solve the problems of large calculation, poor efficiency and low accuracy of the existing reactive power optimization methods for power systems

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
  • Dynamic reactive power optimization method of large-scale alternating current and direct current power system
  • Dynamic reactive power optimization method of large-scale alternating current and direct current power system
  • Dynamic reactive power optimization method of large-scale alternating current and direct current power system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0059] Step S1. Initialize time i to 0 o'clock, starting with 0 o'clock;

[0060] Step S2, input the basic data of the system, the upper and lower limit constraints of the system operation, and the optimal power transmission power of the DC line at the previous moment;

[0061] Step S3, initializing the number of iterations k to 0, and setting the maximum linearization step limit;

[0062] Step S4, performing AC and DC power flow calculations, calculating the voltage and power flow distribution of each node;

[0063] Step S5, perform convergence judgment, judge whether the system constraints are met, and whether the difference between the network loss of the kth time and the k-1 time is less than the convergence accuracy, in fact, execute step S6, otherwise execute step S7;

[0064] Step S6, the reactive power optimization calculation of the time period i is completed, output the optimization calculation result of this period, and enter the i+1 period calculation, and then en...

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 dynamic reactive power optimization method of a large-scale alternating current and direct current power system. The method comprises the following steps of: firstly, solving a sensitivity coefficient matrix of an alternating current and direct current system state variable on a control variable according to an equality constraint; secondly, solving a sensitivity coefficient matrix of section power on the control variable in consideration of a section power inequality constraint, and thus establishing an alternating current and direct current reactive power optimization successive linear planning model of a section power constraint at a single time point; and finally, solving and considering coupling constraints of adjacent time section direct current line power fluctuation smoothness one by one according to each time point, and introducing a computation result of the previous time point at a solving time point, so a dynamic optimization idea is truly embodied. By adoption of the method, the coupling constraints of the adjacent time section direct current power fluctuation smoothness can be considered, the problems of high computation amount and curse of dimensionality caused by the conventional solving dynamic reactive power optimization complete model are solved.

Description

technical field [0001] The invention relates to the field of electric power, in particular to a dynamic reactive power optimization method for a large-scale AC and DC power system. Background technique [0002] The reactive power optimization method of the AC power system refers to that when the system structure and parameters, the active and reactive power of the load, and the active output of the generator are given, under the condition of satisfying various operating equipment and operating constraints of the system, through the optimization of the generator terminal The voltage and reactive power compensation equipment output and the tap of the adjustable transformer are adjusted to minimize the active network loss of the system. In addition to the above-mentioned pure AC system control measures, control measures for reactive power optimization of AC and DC systems also include DC voltage, DC current, control angle of converter stations, etc. [0003] Reactive power opt...

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 Patents(China)
IPC IPC(8): H02J3/18
CPCY02E40/30
Inventor 谢敏何智文刘明波梁敬成谌军
Owner SOUTH CHINA UNIV OF 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