FPGA (Field Programmable Gate Array)-based re-pressing over-current protection method

Abstract

The invention provides an FPGA (Field Programmable Gate Array)-based re-pressing over-current protection method. The method comprises the following steps: (1) computing re-pressing over-current protection; (2) adopting a constant value matching technology of an upper computer; (3) adopting a shifting multiplication and division method; (4) adopting a time division multiplexing method of a state machine; (5) testing the re-pressing over-current protection. According to the FPGA-based re-pressing over-current protection method, an FPGA-based hardware platform is adopted, the processing speed of hardware protection logic is increased by utilizing high-speed FPGA parallel computing, and the safety and the reliability of motions are guaranteed. By the adoption of the constant value matching technology of the upper computer, high precision is guaranteed, the operational complexity and the operational amount are greatly reduced, and the operational speed is increased. By the adoption of the shifting multiplication and division method, a multiplier and a divider are eliminated, and the utilization rate of resources is improved. By the adoption of a state machine designing method, the resources of the multiplier, the divider and a comparator are subjected to time division multiplexing, and the utilization rate of hardware resources is greatly improved.

Description

technical field [0001] The invention relates to a multiple voltage overcurrent protection method, in particular to an FPGA-based multiple voltage overcurrent protection method. Background technique [0002] The phenomenon often accompanied by the failure of the power system is the increase of the current and the decrease of the voltage. The overcurrent protection is realized by the sharp increase of the current when the system fails. However, the start-up of large-scale equipment and machinery will also cause an instantaneous increase in current, which may cause misoperation of the switch. In order to prevent it from misoperation, low-voltage components are added to the protection, and the PT voltage is introduced into the protection device to form a low voltage. Blocking overcurrent, the outlet trips only when the two conditions of "current increase and voltage decrease" are met at the same time. When the overcurrent protection is used for the backup protection of the tran...

AI Technical Summary

Problems solved by technology

[0004] In the existing technology of complex voltage overcurrent protection, most of them are implemented with DSP as the core. Due to its own structural reasons, this implementation method has shortcomings such as slow speed, low efficiency, and poor reliability.

Images