Current transformer current-limiting protection system control device and current-limiting control method thereof

A technology of current limiting protection and control device, applied in emergency protection circuit device, emergency protection circuit device for limiting overcurrent/overvoltage, circuit device, etc. Poor ability, etc.

Active Publication Date: 2013-08-14
WENZHOU UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These technologies should mainly be used in the protection modules of single converters or low-power converters, which have poor impact resistance and are prone to slow response and large circulating currents between converters due to differences in recovery time.

Method used

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  • Current transformer current-limiting protection system control device and current-limiting control method thereof
  • Current transformer current-limiting protection system control device and current-limiting control method thereof
  • Current transformer current-limiting protection system control device and current-limiting control method thereof

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Embodiment Construction

[0041] Such as figure 1As shown, an embodiment of the present invention mainly acts on the device unit in the dotted line frame, including a digital control circuit processor, three voltage signal sampling circuits, three current signal sampling circuits, a PWM inverter, a correction reactor, and an inverter output The transformer and the converter output filter circuit, the converter output filter circuit samples the voltage and current signal output by the converter PWM inverter through the voltage sampling circuit and the current sampling circuit, and inputs the digital control circuit processor, and the digital control circuit The processor is connected to the PWM inverter through the PWM driving circuit, and the PWM inverter, the correction reactor, the inverter output transformer, and the inverter output filter circuit in the converter are sequentially connected.

[0042] The digital control circuit processor adopts a TMS320F28335 DSP control chip with a clock frequency ...

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Abstract

The invention discloses a control device of a current-limiting protection system for a current transformer, and the current-limiting control method thereof. The control device provided by the invention comprises a PWM (pulse-width modulation) inverter, a correction reactor, an inversion output transformer, an output filter, an AC signal sampling circuit, a DC signal sampling circuit and a processor. Compared with other operation protecting products for a current transformer, the device provided by the invention has the advantages that effective current-limiting protection can be achieved during the running process of the current transformer, the respond is fast, and high-current impact during the running process in case of instant and long-time short circuits and the like can be resisted; the method provided by the invention has high reliability, that the current transformer can maintain limited current output during failure period can be effectively ensured, the current transformer can be effectively protected, and meanwhile, better voltage current waveform output can be obtained, and the power supply sustainability can be maintained.

Description

technical field [0001] The invention relates to a short-circuit or high-current impact protection system applied to high-power converters in operation, in particular to a converter current-limiting protection system control device and a current-limiting 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 converter is the core component of the electronic shore power station, and the shore power device has converter protection and anti-interference designs against various accidents or harsh environments. Ship electrical loads include both high-power nonlinear loads of motors and sensitive loads of high-precision electronics, communication and control. Therefore, electronic shore power stations have higher requirements for converter protection performance. In practical applications, the converter is req...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/12H02H9/02
Inventor 戴瑜兴陈义财郑崇伟温烨婷曾国强
Owner WENZHOU UNIVERSITY
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