A FPGA-based source-side current detection and control module and method

Abstract

The invention relates to a primary-current detection and control module and method based on an FPGA. The module includes an input signal adjustment unit, an analog adder unit, a control logic circuit unit, a threshold comparison and pulse width control unit and a circuit breaker driving circuit unit. The method includes the following steps: 1) a differential current is input and then input into the analog adder unit via a differential single-end conversion unit, a full-wave rectifying unit and a filtering unit to carry out level conversion or enters an A / D unit to carry out sampling detection; 2) the A / D unit samples numerical values and communicates with a main control device through a CPCI bus so as to decide short-circuit conditions and control a circuit breaker to act; 3) the main control device sets a comparison threshold of an analog comparator through the CPCI bus and the level conversion result is compared at an analog comparison circuit and a short circuiter is directly controlled through the FPGA to act; 4) current is output from an open-circuit control unit so that monitoring is completed. The primary-current detection and control module based on the FPGA is simple in structure and low in cost and has the excellent characteristics of being speedy and high in reliability and the like.

Description

technical field [0001] The invention relates to an FPGA-based Primary Current Monitoring (PCM) module, which is used for real-time monitoring and control of a high-speed train power supply system. Background technique [0002] The high-speed train central control unit CCU (Central Control Unit) is composed of a power supply module, a central processing unit CPU, a TCN gateway, an IO module, a bus management module, and a backplane. Protect. [0003] The source-side current detection (PCM) module is mounted on the central processing unit CPU, and performs data communication through the bus. The source-side current detection module monitors the input current, return current, and LC line filter current of the source-side line. When dangerous situations such as overload, leakage, or current imbalance occur, the output can restore the DC control signal. The source-side current detection is mainly used in the fault Turn on / off the source-side current path at the same time. Howe...

AI Technical Summary

Problems solved by technology

However, at present, the research and development of domestic high-speed train systems has just started, and there is no stable and reliable source-side current detection control module

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