Method for statically analyzing voltage stabilization of VSC-HVDC (Voltage-Sourced Converter-High Voltage Director Current) containing AC and DC system

An AC/DC system, static analysis technology, applied in AC network circuits, DC network circuit devices, electrical components, etc., can solve problems such as commutation failure failures

Inactive Publication Date: 2011-02-16
HOHAI UNIV +1
View PDF3 Cites 47 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The traditional HVDC using thyristor commutation equipment can only control the conduction angle, and needs reverse voltage to realize shutdown. The possible commutation failure of thyristor commutation equipment has become a major threat to the safe operation of the system; and the commutation process To consume a large amount of reactive power, it poses a serious challenge to the voltage stability of the AC system connected to it

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
  • Method for statically analyzing voltage stabilization of VSC-HVDC (Voltage-Sourced Converter-High Voltage Director Current) containing AC and DC system
  • Method for statically analyzing voltage stabilization of VSC-HVDC (Voltage-Sourced Converter-High Voltage Director Current) containing AC and DC system
  • Method for statically analyzing voltage stabilization of VSC-HVDC (Voltage-Sourced Converter-High Voltage Director Current) containing AC and DC system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] Below in conjunction with accompanying drawing, the technical scheme of invention is described in detail:

[0035] Since the continuum power flow (CPF) problem was proposed in the early 1990s, it has made great progress and been widely used in the study of static stability of power systems. Due to the practicability of its model and the robustness of its algorithm It has become a basic calculation engine in energy management system (EMS). As a powerful tool for voltage stability analysis, the continuous power flow method can solve the convergence problem when the system equation is close to the stability limit operation state. By continuously updating the power flow equation, the power flow equation remains convergent under all possible load states, no matter in There are solutions for both stable and unstable equilibrium points. Based on the unified iterative power flow algorithm of the AC-DC hybrid system, the present invention establishes the voltage stability stati...

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 method for statically analyzing voltage stabilization of a VSC-HVDC (Voltage-Sourced Converter-High Voltage Director Current) containing AC and DC system. Aiming at the problem of voltage stability, through determining a tide equation and a converter equation of the VSC-HVDC AC and DC system and considering the change of a load and a generator output, a tide equation containing parameters is formed and a static model of the VSC-HVDC AC and DC hybrid system is established; and the static model is analyzed by adopting a continuous tide method based on a uniform iteration method, and the influence of a VSC-HVDC element on the voltage stability of the system is researched. The invention lays a foundation for further researching the voltage stability characteristic ofthe VSC-HVDC AC and DC hybrid system.

Description

technical field [0001] The invention relates to a static analysis method for voltage stability of an AC-DC hybrid system including a voltage source converter type high voltage direct current transmission (VSC-HVDC), belonging to the technical field of power system operation and control. Background technique [0002] At present, my country's power system has entered the stage of transition from regional power grids to national interconnected power grids. High-voltage direct current transmission (HVDC) has obvious advantages in ultra-long-distance power transmission and system interconnection. my country's Southern Power Grid and East China Power Grid have formed an AC-DC hybrid transmission network. The AC-DC hybrid system has a larger transmission capacity and a more flexible operation mode. The introduction of multiple DC tie lines improves the controllability of the entire system, but it also brings some special problems, making the AC-DC hybrid system safe. The stability...

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): H02J3/00H02J3/18H02J1/00
CPCY02E40/30
Inventor 卫志农韦延方孙国强
Owner HOHAI UNIV
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