The Research Of Full Digital UPS Based On DSP

Uninterruptible power supplies (UPS) play a key role in interfacing critical loads, such as computers, communication system, medical system. They can provide reliable and pure power supply for loads neither power good or not. Among the various UPS topologies, on-line UPS provides the most protection to such loads against any utility power supply. However, the old on-line UPS includes many power parts and analogy controllers, it has been one of the most complex and expensive type of system. Therefore, the study of high quality and reliability full digital UPS (Uninterruptible Power Supply), which fits the development of modem science and technology has become an attentive problem.This paper described the middle/high-power (10kVA) on-line UPS, which was based on DSP TMS320F2407 control chip, which is a kind of DSPS of TI company. For DSP controller's high CPU bandwidth and peripherals specifically chosen for control application, we integrate PWM controllers ,. associated circuits and microprocessor chip for digital control into one DSP controller, which can lower system cost and increase integration. The whole UPS is controlled by full digital method including the generation of SVPWM wave, the tracking output of frequency & phase, and the PID control arithmetic etc.The research is an instructive attempt and exploration of the middle/high- power full digital on-line UPS development, based on references to a lot of information and the latest technology on UPS. The system has achieved the anticipative targets and requirement through testing and debugging.