Current transformer parallel operation switching control device and switching control method

A technology of operation switching and control devices, which is applied in the field of converters and can solve problems such as slow response and poor impact resistance

Active Publication Date: 2014-11-05
GUANGDONG ZHICHENG CHAMPION GROUP
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These technologies should mainly be used in the protection module of a single converter or a low-power converter. When applied to a parallel system together with the converter, the impact resistance is poor, and it is prone to slow response and delay due to recovery time. The difference causes a large circulating current between the converters

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
  • Current transformer parallel operation switching control device and switching control method
  • Current transformer parallel operation switching control device and switching control method
  • Current transformer parallel operation switching control device and switching control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0051] Such as figure 1 As shown, an embodiment of the present invention includes a processor, two voltage sampling circuits, two current sampling circuits, an input circuit, a PWM rectifier, a PWM inverter and an output circuit, and the input circuit passes through the first voltage sampling circuit, the second A current sampling circuit is connected to the processor, the output circuit is connected to the processor through the second voltage sampling circuit and the second current sampling circuit, and the processor is respectively connected to the PWM rectifier and the PWM inverter through two PWM driving circuits. The input circuit, the PWM rectifier, the PWM inverter, and the output circuit are connected in sequence; an energy storage capacitor is connected in parallel between the PWM rectifier and the PWM inverter.

[0052] The TMS320F28335DSP control chip with a clock frequency of 150MHz produced by TI Company is used as the processor, supplemented by various sampling c...

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 current transformer parallel operation switching control device and a switching control method. The current transformer parallel operation switching control device comprises a processor, two voltage sampling circuits, two current sampling circuits, an input circuit, a PWM (pulse width modulation) rectifier, a PWM inverter and an output circuit. Compared with other frequency converter operation protection products, the current transformer parallel operation switching control device can realize effective current-limiting protection in a frequency converter parallel system, is high in response speed, and can resist transient and non-transient short-circuit impact, and ring current in parallel operation can be effectively suppressed. The current transformer parallel operation switching control device and the switching control method have the advantages that the method is high in reliability and can effectively guarantee that current transformers keep outputting limited current in failure periods, the current transformers can be effectively protected, good voltage and current waveforms can be outputted, and the power supply continuity is maintained.

Description

technical field [0001] The invention relates to a converter, in particular to a converter switching control device for parallel operation and a switching control method thereof. Background technique [0002] The demand for converter capacity of shore power station is constantly increasing, and the requirements for its performance and reliability are getting higher and higher. The capacity of a single converter is generally up to 500kVA, while the shore power demand has reached the megawatt level. In order to expand the capacity of the converter, using multiple converters to run in parallel is the most reliable method so far. However, the overload capacity of the power components (GTO, IGBT, IPM, etc.) in the converter is poor, and the overcurrent detection circuit of the protection component is very sensitive. The existing products often cause the converter to stop due to the impact of the impact current. Ship electrical loads include high-power and strong impact loads suc...

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): H02M1/32
Inventor 戴瑜兴陈义财郑崇伟温烨婷张正江
Owner GUANGDONG ZHICHENG CHAMPION GROUP
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