Multi-CPU communication method and relay protection device

Abstract

The invention provides a multi-CPU communication method, which adopts a high-speed full-duplex serial SPI communication mode among CPUs. The method is characterized in that ferroelectric memories FRAMs are arranged among the CPUs; SPI ports of at least two CPUs are connected through a SPI port of one FRAM; anti-collision communication lines are connected between the CPUs which are connected with the FRAM and communicate through the FRAM; and the CPUs send and receive data through the FRAMs. The multi-CPU communication method designed by the invention has the advantages of increasing transmission speed and reliability among the CPUs and solving collision problems when two CPUs read and write data at the same time. The reliability and operation speed of products are fully guaranteed by using a device adopting the multi-CPU communication method in relay protection equipment.

Description

Technical field:

[0001] The invention belongs to the technical field of power system automation and relay protection, in particular to a communication method between core components CPUs in an automatic control system and a device using the communication method. Background technique:

[0002] The vast majority of automatic devices, measuring devices and relay protection devices in modern power systems are composed of microprocessors, integrated circuits and electronic components. These automatic devices, measurement devices and relay protection devices are collectively referred to as "intelligent electronic devices" IED (Intelligent Electric Device). With the rapid development of large-scale integrated circuits and microprocessor technology, the functions and functions of CPU, the core component of intelligent electronic equipment IED, have also entered a new era. Many IEDs require multiple CPUs to work together. How to solve the problem between multiple CPUs? Communication...

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