USB communication system of field excitation controller based on DSP chip, and operation method thereof

Abstract

A USB communication system of an excitation controller based on a DSP chip is characterized in that the system is composed of a signal collecting module, a digital processor, a storing module, a USB communication module and an upper computer of the excitation system and has the advantages that a high-effective digital signal processing chip is adopted to realize various complicated generator excitation control rules and enhance the accuracy and the speed of the excitation system; a flexible USB interface and the function-prepared application software of the upper computer are adopted to realize abundant communication functions including that system oscillations caused by various broken-circuit failures, system frequency discontinuity and the current and voltage changes of the system dynamic process all can be constantly recorded without missing; a reliable report of the present work state can be directly obtained by an analysis software analyzing timely voltage-current curves.

Description

(1) Technical field: [0001] The invention belongs to the field of motor automation, in particular to a USB communication system of an excitation controller based on a DSP chip and a working method thereof. (2) Technical background [0002] Motor automation control is an important field of power system automation, which has an important impact on the operation of the entire power system. The excitation control device with good performance can not only ensure the reliability and stability of generator operation, but the current generator control theory mostly adopts linear control theory, the core structure is mostly 8-bit or 16-bit single-chip microcomputer, and the communication interface is mostly RS232 serial communication. The generator itself is a nonlinear system, so the linear control effect is often unsatisfactory. On the one hand, the reason here is that the core structure used is mostly a single-chip microcomputer, and the operation speed and accuracy are limited. I...

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Problems solved by technology

The excitation control device with good performance can not only ensure the reliability and stability of generator operation, but the current generator control theory mostly adopts linear control theory, the core structure is mostly 8-bit or 16-bit single-chip microcomputer, and the communication interface is mostly RS232 serial communication. The generator itself is a nonlinear system, so the linear control effect is often unsatisfactory. On the one hand, the reason here is that the core structure used is mostly a single-chip microcomputer, and the operation speed and accuracy are limited. In addition, the time delay of the peripherals makes it difficult to achieve Various complex control theories. On the other hand, the original excitation controller communication system mostly uses RS232 or RS485, which requires little communication. Therefore, the speed is limited, the transmission method is single, and it is difficult to realize complex transmission functions. Flexibility It is also poor, so that the means of monitoring and analyzing the operating condition of the generator are limited, thereby reducing the operating performance of the generator

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