Design Of The Test System For Power Supply Modules Of Power Supply Panel

The rail transport in China has been developing rapidly in recent years, and railway electrification provided safety and efficient operation for it. Railway signal Power Supply Panel is the power supply equipment for electrified railway, and can guarantee stable operation of electrified railway. The power supply module is the core of the railway signal power supply panel, which offers a variety of power outputs, and these outputs are distributed to the road network by the intelligent railway signal power supply panel. In according with rules and regulations of The Ministry of Railways, power supply module should be tested regular. If one module is breakdown, this module together with the standby module used to replace this module should be tested. There are no power supply module test devices on sale currently. So it is necessary to design a kind of automatic system to test power supply module. In this thesis we design and implement a test system for power supply modules of power supply panel.The thesis starts with the research background which includes the classification and interface of power supply module, followed by detailed information on overall design of test system and the function of each unit. Finally we introduce the virtual test platform and structure design, and detail the hardware and software of test system.The thesis focuses on hardware and software design for the test system. Our team has realized a test system last year, but it has some drawbacks. So we make some improvements according to customers’ requirements. The test system consists of management unit, intelligent connection unit, control unit, load bank, voltage regulator and voltmeters. Management unit which is developed by VB language is the core of test system. Management unit can realize human-computer interaction, storage test process, command transmission and other functions. Microcontroller is the bridge between software and hardware, and can analyze the received commands, and control driver circuit. The driver circuit is designed to control intelligent connection circuit, voltage regulator, load bank and voltmeters. The intelligent connection unit can provide proper connection for various power supply modules by automatic adjustment. The thesis designs a new intelligent load bank to replace the original one, for the later has some drawbacks. A virtual test platform which can simulate the operation of each unit is designed to meet the requirements of management unit test.The test platform is tested and proved to be secure, stable and industry leading with broad applications to meet initial design requirements.