Hardware Design Of Power Quality Monitor Based On DSP

Nowadays, lots of electric inverters have got widely application. On the one hand, they have greatly enhanced the productivity undoubtedly. On the other hand, they have done great harm to power quality of the applied electric system. How to improve power quality and insure this sensitive electronic equipment's reliable operation becomes a stringent and important task, which has attracted great attentions of specialist from home and abroad.In this article, we introduce a set of online power quality monitor who is based on DSP (Digital Signal Processor). The monitor makes full use of DSP chip's strong operation capability. It can monitor power quality online, display real-time measure data and save superscalar data, which can provide accurate data to power quality evaluation and improvement. This device can be applied to medium and low voltage distribution output side or the input side of large consumer.Structure of paper: concept of power quality; bringing forward questions of power quality; measurements of power quality; requirements and realization of power quality's measurement; the appliance and development of DSP processor in power quality measurement. Then comes the detailed description of this monitor; A/D converting; design of DSP circuit; system commissioning and debugging.The monitor introduces chip TMS320C6713 of TI Company as central processor. It can monitor different parameters of power quality. In order to satisfy the need of real-time requirement, CPLD is entitled for system logical control.This monitor has powerful functions,its good performance such as accurate measurement, high measuring speed and good stability has got testified in many field application cases. The application field includes distribution grid and different industrial parks. Furthermore, its extensibility, function and performance is more competent than any other product of same category.