Dual-CPU based circuit breaker intelligent controller

Abstract

The invention relates a dual-CPU based circuit breaker intelligent controller. The controller comprises a power supply unit, an acquisition unit, an input and output unit, a communication unit, a man-machine interactive unit and a processor unit. The processor unit adopts a dual-CPU structure, and consists of DSP and AEM; in the acquisition unit, 12-channel analog amount acquisition is carried out at the same time, and the sampling accuracy thereof is 16-bit; the input and output unit comprises a 16-channel input and 16-channel output; the communication unit takes the high-speed Ethernet as a main interface, other extension interfaces comprise RS232, RS485 and JTAC; in the power supply unit, each supply circuit is over the ground alone; the man-machine interactive unit comprises a liquid crystal display and cross press keys. On account of the anti-electromagnetic interference, in the invention, shielding measures and PCB anti-interference scheme are taken. The circuit breaker intelligent controller of the invention is suitable for complex control and status control of high voltage level circuit breaker, has good real-time and reliability, and can also be applicable to develop power grid atomization.

Description

technical field [0001] The invention relates to a circuit breaker intelligent controller based on dual CPUs, which belongs to the field of intelligent electric appliances. Background technique [0002] With the rapid increase of my country's electricity load and the large span of my country's supply and demand positions, the high-voltage transmission lines and transmission levels of the State Grid have been further improved in recent years, which has led to a sharp increase in the demand for circuit breaker equipment. At the same time, the demand for circuit breaker intelligent controllers The requirements have also increased. [0003] Traditional circuit breaker controllers can achieve certain acquisition accuracy and protection action requirements, but the effect of multi-channel signal processing is not good, the real-time performance is poor, bottlenecks are prone to occur, and it is not easy to expand and maintain. The intelligent controller of high-voltage circuit brea...

AI Technical Summary

Problems solved by technology

[0003] Traditional circuit breaker controllers can achieve certain acquisition accuracy and protection action requirements, but the effect of multi-channel signal processing is not good, the real-time performance is poor, bottlenecks are prone to occur, and it is not easy to expand and maintain

The intelligent controller of high-voltage circuit breaker should have the advantages of high reliability, high communication rate, real-time processing, small size, low power consumption, etc., which forces traditional circuit breaker controllers not to be widely used and promoted

At present, manufacturers and users require real-time control of the working status of the circuit breaker, and at the same time propose various protection methods, which requires more and more monitoring information for the status point of the circuit breaker, making the control method more and more complicated. The way it works requires more and more intelligence

[0004] Patent CN200610025257.8 describes a circuit breaker controller, but the electromagnetic compatibility performance of the controller is insufficiently considered, and the plug-in structure cannot be used for isolation. The communication adopts 485 interface, the speed is low, and the processor adopts MC68HC908LK24, which cannot be compared Good real-time performance that meets the working requirements of circuit breakers

[0005] In the patent CN200810203392.6, two DSP processors are used. The DSP processor has faster computing and processing capabilities, but the control ability for complex tasks is not as powerful as the ARM processor; the communication method adopts field bus, which is not as fast as the optical fiber Ethernet method. This patented communication interface is single

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