Under-voltage protection device and system of converter control system

An undervoltage protection and control system technology, applied in the field of control, can solve problems such as wrong commands, switching tube drivers cannot be closed correctly, and converters cannot safely exit the operating state.

Active Publication Date: 2013-09-18
CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the input power supply is under-voltage or power-off at this time, the normal power supply of the converter control unit cannot be maintained, and the converter control unit is likely to issue in

Method used

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  • Under-voltage protection device and system of converter control system
  • Under-voltage protection device and system of converter control system
  • Under-voltage protection device and system of converter control system

Examples

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Embodiment Construction

[0046] see figure 1 , the present invention provides a specific embodiment of an undervoltage protection device for a converter control system. In this embodiment, the device includes a first energy storage unit 101 , a second energy storage unit 102 and an undervoltage protection unit 103 .

[0047] The input power supply 104 supplies power to the converter control unit 105 and the switch transistor driver 106 in the converter module. Wherein, the input power supply may be to supply power to the switch tube driver through the power supply module in the converter module. The input power supply is the power supply dedicated to the converter control system.

[0048] The first energy storage unit 101 is used to be charged by the input power supply 104 when in the charging state, and supplies power to the converter control unit 105 when in the discharging state, so as to provide enough electric energy to ensure that the converter control unit 105 can send the correct energy to th...

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PUM

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Abstract

The invention provides an under-voltage protection device and a system of a converter control system; the device comprises a first energy accumulating unit, a second energy accumulating unit and an under-voltage protection unit; when the first energy accumulating unit is charged by an input power supply, and discharges and supplies power to a converter control unit; the second energy accumulating unit is charged by the input power supply, and discharges and supplies power to a switch tube driver; the under-voltage protection unit samples the voltage of the input power supply; and if the sampled voltage is less than first reference voltage, an under-voltage locking signal is sent to the converter control unit. We can know that when the first energy accumulating unit and the second energy accumulating unit discharge, the first energy accumulating unit supplies power to the converter control unit and the second energy accumulating unit supplies power to the switch tube driver, so that the converter control unit sends a correct blocking instruction and the switch tube driver correctly cuts off and protects an IGBT (insulated gate bipolar transistor) when the input power supply is under-voltage or loses power, and a converter safely exits a running state.

Description

technical field [0001] The invention relates to the field of control, in particular to an undervoltage protection device and system for a converter control system. Background technique [0002] Converters play a very important role in the fields of industrial frequency conversion, photovoltaic power generation, wind power generation, and power conversion. For example, as the traction power equipment of electric locomotives, traction converters are regarded as the "heart" of locomotives and EMUs, and are one of the important symbols to measure the technical level of a country's rail transit equipment. Whether the traction converter can operate safely and efficiently is the key to the safe and efficient operation of the train. [0003] The converter includes a converter module, a converter control unit, etc., wherein the converter module includes a switch tube driver and IGBT and other switch tubes, the switch tube driver is used to drive IGBT and other switch tubes, and the ...

Claims

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Application Information

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IPC IPC(8): H02H7/12H02M1/32
Inventor 陈明翊忻力马伯乐荣智林陈燕平李华翁星方杨涛杨光陈玉其
Owner CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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