Digital excitation control system based on 32-bit floating-point type processor and working method

Abstract

The invention relates to a digital excitation control system based on a 32-bit floating-point type processor and a working method. The digital excitation control system mainly comprises a DSP (digital signal processor) processor module, a switch quantity input module, a level conversion module, a switch quantity output module, an analogue quantity adapting module, a frequency measuring module, analternating-current sampling module, a data storage module, an excitation current adapting module, a data receiving and emitting module and an intelligent displaying unit module. In the invention, the high-performance 32-bit floating-point type processor is used as a main CPU chip; and a touchable tablet computer with excellent performance is connected with a main control unit by a dual-high-speed CAN (controller area network) network to form an intelligent displaying system. The advanced alternating-current sampling algorithm is combined with the excellent performance of the DSP so as to realize the deep digitalization of the excitation controller, thus really realizing standardization on data processing; and on data transmission, the high-speed and stable transmission of the data is realized by the dual-high-speed CAN network, thus improving the whole performance index of the excitation control system.

Description

Technical field: [0001] The invention relates to the technical field of data acquisition for an excitation controller of a synchronous generator in a power system, in particular to a digital excitation control system and a working method based on a 32-bit floating-point processor. Background technique: [0002] The excitation system is an important part of the generator system, and its main function is to maintain the normal operation of the generator and the stable operation of the power system. Today has already entered the era of microcomputer excitation. At present, the regulators launched in the domestic market generally use 16-bit or 32-bit single-chip microcomputers as the main processor. Generally, the hardware structure uses a dual-channel or multi-channel structure. Through the regulator cabinet and The power de-excitation cabinet and the excitation transformer constitute the excitation control system. In order to meet the needs of stable operation of the power sy...

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Problems solved by technology

[0004] Chinese patent CN200510122302.7 discloses a data acquisition and processing system based on DSP digital excitation controller; it is an excitation system with f2812 as the core, and the insufficient part is in the data acquisition system, although the selected sampling chip is more accurate High, the processor is also 32-bit, but because the processor itself is a fixed-point processor, in the actual calculation process, it will increase the calculation error, and then increase the system error, which will affect the control accuracy and response of the entire system; In addition, in the power rectification circuit, the trigger pulse required by the thyristor does not clearly explain how to generate it. In the excitation system, due to electromagnetic interference and other reasons, a very important link is how to generate and send the pulse to the rectifier bridge. , if the transmission distance is long, the pulse signal is easily interfered

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