Differential protection hardware circuit with percentage differential and implementation method of differential protection hardware circuit

Abstract

The invention discloses a differential protection hardware circuit with percentage differential and an implementation method of the differential protection hardware circuit. The differential protection hardware circuit comprises a data collection module, a data processing module, a protection algorithm module and a relay, wherein the data collection module is used for collecting input and output three-phase current signals of a reactance transformer, and taking the collected input and output three-phase current signals of the reactance transformer as an data input of the data processing module; the data processing module is used for carrying out filter operations on the input and output three-phase current signals of the reactance transformer, and taking the filter operation result as the input of the protection algorithm module; the protection algorithm module is used for carrying out a percentage differential protection design on the current signals input by the data processing module, and taking the final actuating signal as the input of the relay; the relay carries out an action according to the signal input by the protection algorithm module; if the input signal is high, the relay is closed; and if the input signal is low, the relay is closed. According to the differential protection hardware circuit, the percentage differential protection function is realized; and the reliability and the processing speed are greatly improved.

Description

Technical field: [0001] The invention belongs to the field of computer applications, and specifically relates to a differential protection hardware circuit with ratio differential and an implementation method thereof. Background technique: [0002] Traditional relay protection has basically been eliminated in power plants and substations, and then the microcomputer protection has been replaced. With the rapid development of computer network technology, the power system protection composed of microcomputers makes the protection of Reliability, sensitivity, and quick action have been greatly improved. On the one hand, the speed of the processor is getting faster and faster. The hardware structure of the system has changed from a single 8-bit processor to a 16- and 32-bit processor, and then to today's hybrid structure of multiple CPUs and multiple DSPs. On the other hand, hardware self-checking And the application of "watchdog" has improved the reliability of hardware to a certain...

AI Technical Summary

Problems solved by technology

But this kind of microcontroller (MCU) also has inherent deficiencies, even DSP can't fundamentally solve the problem of program "running away" and so on.

In terms of processing speed, DSP and microprocessors cannot meet the requirements of emerging new algorithms and theories.

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