Novel IGBT high-pressure series valve controlling and monitoring system

Abstract

A control and monitoring system of IGBT (insulated gate bipolar transistor) high voltage series valves comprises an IGBT gate circuit, a valve control and monitoring unit and an optical fiber transmission system. The valve control and monitoring unit is connected to the IGBT gate circuit by the optical fiber transmission system. The IGBT gate circuit also includes an IGBT periphery circuit mainly composed of capacitor, resistor and collector voltage clamping circuits. The optical fiber transmission system includes four optical fiber channels for connecting the IGBT gate circuit with the valve control and monitoring unit and an independent analog signal optical fiber channel for transmitting a valve current signal to the valve control and monitoring system. The system satisfies various functions of IGBT switching on, IGBT switching off, voltage loss balance control, valve state monitoring and so on.

Description

technical field

[0001] The invention belongs to the field of power electronics and power systems, and in particular relates to a new IGBT high-voltage series valve control and monitoring system. Background technique

[0002] The semiconductor power switching device that appeared in the mid-1980s - the insulated gate bipolar transistor IGBT (Insulated Gate Biploar Transistor) is a composite device, its input control part is a MOSFET, and the output stage is a bipolar junction transistor. The advantages of MOSFET and power transistor: high input impedance, voltage control, small driving power, fast switching speed, operating frequency up to 10-40kHz, lower saturation voltage, larger voltage and current capacity, and wider safe working area. However, the disadvantage of IGBT is that the voltage and current allowable value of a single IGBT are difficult to increase. In order to apply to high-voltage and high-power fields, the method of connecting IGBTs in series is usually used....

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