Negative-sequence compensation device and method for traction-compensation transformer

A technology for compensating transformers and compensating devices, which is applied in reactive power compensation, reactive power adjustment/elimination/compensation, and multi-phase network asymmetry reduction, etc. problems such as small content, to achieve the effect of enhancing energy-saving effect, advanced technology and easy installation

Pending Publication Date: 2018-12-21
SOUTHWEST JIAOTONG UNIV
View PDF0 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] High-speed and heavy-duty railways have widely used high-power AC-DC electric locomotives or EMUs based on full-control devices such as IGBTs and IGCTs. The core is traction converters with multiple sets of four-quadrant PWM control and multiple control. The content is small, and the power factor is close to 1, but the traction power of AC-DC el

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
  • Negative-sequence compensation device and method for traction-compensation transformer
  • Negative-sequence compensation device and method for traction-compensation transformer
  • Negative-sequence compensation device and method for traction-compensation transformer

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0027] Example one

[0028] Such as figure 2 As shown, the embodiment of the present invention provides a negative sequence compensation device for a traction-compensation transformer, wherein: the negative sequence compensation device NCS is installed in the traction-compensation transformer, and includes a reactive power connected to the traction-compensation transformer The compensator SVG and the measurement and control unit MC; the measurement and control unit MC is connected to the reactive power compensator SVG, and is used to measure the voltage value of the voltage transformer PT and the current value of the current transformer CT and calculate the active power and working conditions of the traction port To control the reactive power of the reactive power compensator SVG.

[0029] In the embodiment of the present invention, the reactive power compensator SVG includes a first reactive power compensation unit SVG 1 And the second reactive power compensation unit SVG 2 ; The...

Example Embodiment

[0032] Example two

[0033] Such as image 3 As shown, the embodiment of the present invention provides a negative sequence compensation method of a traction-compensation transformer using the negative sequence compensation device described in the first embodiment, wherein: the specific steps of the negative sequence compensation method include: the measurement and control unit MC calculates the traction port power P and working conditions through the voltage value of the voltage transformer and the current value of the current transformer to control the reactive power of the first reactive power compensation unit and the second reactive power compensation unit; set the traction-compensation transformer primary side The allowable capacity of the negative sequence is S d , The traction load power factor is 1:

[0034] (1) When the traction port is in traction mode, the measurement and control unit MC controls the first reactive power compensation unit SVG 1 Absorbed reactive power ...

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 negative sequence device of a compensation transformer and a method thereof, which relate to the technical field of traction power supply of an electrified railway. The negative sequence compensation device is mounted on the traction-compensation transformer, wherein an input terminal of a measurement and control unit MC is connected with a measurement terminal of a traction port voltage transformer PT and a measurement terminal of a current transformer CT, and an output terminal of the measurement and control unit MC is connected with a control terminal of the firstreactive power compensation unit SVG1 and a control terminal of the second reactive power compensation unit SVG2. The measurement and control unit is connected with the reactive power compensator, andthe reactive power of the first reactive power compensation unit and the second reactive power compensation unit is controlled by calculating the traction port power P and the working condition through the voltage value of the voltage transformer and the current value of the current transformer. The device and method are used to measure the voltage value of the voltage transformer and the currentvalue of the current transformer and calculate the traction port power and operating conditions to control the reactive power of the reactive power compensator.

Description

technical field [0001] The invention relates to the technical field of AC electrified railway power supply, in particular to the technical field of traction transformer structure. Background technique [0002] Electrified railways generally adopt the single-phase power frequency AC system powered by the public power system. In order to make the single-phase traction load be distributed as balanced as possible in the three-phase power system, the electrified railway often adopts the scheme of rotating phase sequence and separate phase and partition power supply. The adjacent power supply areas at the phase-splitting partitions are divided by phase-splitting insulators to form electrical split phases, also known as phase splits. In order to prevent electric locomotives from burning out catenary suspension components due to arcing through electric split-phase emission, and even causing phase-to-phase short-circuit and other accidents, as the train speed continues to increase, w...

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): H02J3/26H02J3/18
CPCH02J3/18H02J3/26Y02E40/30Y02E40/50
Inventor 李群湛
Owner SOUTHWEST JIAOTONG 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