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

Power flow calculation method for complex topology active distribution network containing direct current system

A technology for power flow calculation and DC system, applied in AC network circuits, power transmission AC networks, AC networks with the same frequency from different sources, etc. The effect of calculation amount, good convergence performance, and high computing efficiency

Active Publication Date: 2017-07-14
ELECTRIC POWER RES INST OF STATE GRID ANHUI ELECTRIC POWER +1
View PDF3 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims at the current flow calculation process of the mixed connection of AC and DC systems in the existing distribution network. It is necessary to perform power flow calculations for each AC and DC system separately, which has a large amount of calculation and poor convergence. For the interconnection of multiple AC and DC systems, when When the convergence of one of the systems is poor, it will lead to the problem of poor global convergence of the whole system, or even non-convergence. A method for calculating the power flow of active distribution networks with complex topologies including DC systems is provided.

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 flow calculation method for complex topology active distribution network containing direct current system
  • Power flow calculation method for complex topology active distribution network containing direct current system
  • Power flow calculation method for complex topology active distribution network containing direct current system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0049] In order to make the technical means, creative features, goals and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

[0050] The gist of the present invention is that, through the analysis of the power flow calculation process of the existing distribution network AC-DC system mixed connection, it is found that in the current power flow calculation process of the existing distribution network AC-DC system mixed connection, each AC-DC system needs to be separately The power flow calculation has a large amount of calculation and poor convergence. For the interconnection of multiple AC and DC systems, when one of the systems has poor convergence, it will lead to poor global convergence of the entire system, or even no convergence. Through the present invention A power flow calculation method for complex topological active distribution networks with DC systems is provided to ...

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 provides a power flow calculation method for a complex topology active distribution network containing a direct current system in allusion to a problem of poor convergence in the AC-DC system hybrid power flow calculation process of the existing distribution network. The method is characterized in that the active distribution network is divided into a direct current system and an alternating current system according to a voltage source converter; whether weak loop running exists in the system or not is determined according to opening-closing conditions at a loop closing point so as to perform corresponding power flow calculation; and a power flow calculation result of the active distribution network hybrid system is acquired finally by combining a power flow calculation result of the direct current system. Corresponding adjustment is performed on the power flow calculation sequence of the direct current system and the alternating current system and selection for power flow calculation parameters of the converter under different control strategies of the grid-connected converter, and power flow calculation for the whole hybrid system can be realized by performing only one time of alternative iteration convergence on the direct current system and the alternating current system.

Description

technical field [0001] The invention relates to the technical field related to the grid structure and operation mode of a distribution network, in particular to a method for calculating the power flow of a complex topology active distribution network including a DC system. Background technique [0002] With the continuous development and promotion of distributed power generation and advanced power electronics technology, the requirements for power quality and power supply reliability on the user side continue to increase, and the traditional AC distribution network will face distributed power access. , source-load coordination, and grid operation stability, economy, and power quality are huge challenges. On the one hand, the main distributed power sources are basically direct current (or use direct current technology), which must be incorporated into the AC distribution network through DC / AC converters; on the other hand, more and more industrial loads use frequency conversi...

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): H02J3/06H02J3/36
CPCH02J3/06H02J3/36H02J2203/20Y02E60/60
Inventor 骆晨金炜王刘芳李伟徐斌丁津津陆巍吴少雷赵成王明冯玉裴倩史亮蔡梦怡
Owner ELECTRIC POWER RES INST OF STATE GRID ANHUI ELECTRIC POWER
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