MMCC direct railway power compensator and control method thereof

A power compensator, power compensation technology, applied in reactive power adjustment/elimination/compensation, reactive power compensation, AC network voltage adjustment, etc., can solve the problems of bulky, heavy and high cost

Inactive Publication Date: 2014-01-22
HUNAN UNIV
View PDF2 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This structure requires two step-down split transformers, the capacity of which is equivalen

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
  • MMCC direct railway power compensator and control method thereof
  • MMCC direct railway power compensator and control method thereof
  • MMCC direct railway power compensator and control method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] like figure 2 As shown, the MMCC type direct railway power compensator according to an embodiment of the present invention is composed of four sides; each side is composed of an H bridge chain 2 and a filter inductor 3; the H bridge chain 2 is formed by connecting multiple H bridge units in series ; The four intersections of the quadrilateral are divided into two groups according to the diagonals, and the two groups of intersections are respectively connected to the two traction power supply arms through cables. The device forms a quadrilateral single-phase AC-AC converter by using multi-level cascaded converters, and can be directly connected to the traction power supply arm without a step-down transformer. At the same time, there is no need for a DC link in the middle, and the two-way conversion and flow of power can be directly realized, and at the same time, the reactive power generated by the locomotive load of the traction power supply arm can be compensated. Th...

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 MMCC (modular multilevel cascade converter) direct railway power compensator and a control method thereof. The MMCC direct railway power compensator adopts a quadrilateral single-phase AC-AC converter structure, and each of four sides comprises a modular multilevel cascade converter and an inductor and can be directly connected with a traction power supply arm without a step-down transformer; the quadrilateral single-phase AC-AC converter is free from a direct-current link in a process and can be used for achieving bidirectional power conversion and flow and compensating reactive power and harmonic waves of two traction power supply arms. Meanwhile, the invention discloses a comprehensive voltage and current control method for the MMCC direct railway power compensator, and the method can be used for achieving quick response of an output current, keeping stable and balanced direct-current side voltage and effectively improving the control performance of a system.

Description

technical field [0001] The invention relates to the field of power quality control of railway traction systems, in particular to an MMCC type direct railway power compensator and a control method thereof. Background technique [0002] As an integration of contemporary high-tech, high-speed electrified railway has the advantages of large transport capacity, low energy consumption, low pollution, safety and comfort. One of the important signs of . However, due to its unique power supply mode and locomotive load characteristics, high-speed electrified railways have brought power quality problems such as negative sequence, harmonics, voltage fluctuations, and flicker to the power system, reducing the power supply quality of the power system and affecting the safety of adjacent power grids Stable operation. In recent years, with the further development and expansion of the high-speed railway power supply system, the resulting power quality problems such as negative sequence and...

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): H02J3/18H02J3/12
CPCY02E40/30
Inventor 马伏军罗安熊桥坡刘月华
Owner HUNAN 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