Abstract
In view of the large volume, complex structure and many transmission links of the current circuit breaker operating mechanism, a new type of electromagnetic actuator and electronic controller are used to shorten the operation time. This paper introduces the hardware and software design of an intelligent fast switching controller based on CPLD. The hardware circuit design of the controller is mainly described, including power supply conversion and charging voltage monitoring, switch state monitoring, control command monitoring, relay output, LED indicator and split switch driving module. The optocoupler isolation is realized between input and output, and the thyristor module is used to drive the capacitor discharge. The feasibility of the design circuit is verified by the actual sampling waveform, which has the advantages of high-speed operation, intelligent control, high technical performance and reliable operation.
Highlights
With the expansion and intelligent development of the power system, high requirements have been put forward for the intelligent circuit breaker
This paper introduces the hardware and software design of an intelligent fast switching controller based on Xilinx's high performance CPLD
Optocoupler isolation and TVS design are used to complete the design of the fast switch controller, realize the specific functions and debug
Summary
With the expansion and intelligent development of the power system, high requirements have been put forward for the intelligent circuit breaker. On the basis of subsequent research, it is easy to form a series of intelligent switchgear and complete sets of devices in the field of distribution. It is popularized and applied in the power system to significantly improve the control and protection level of the power grid. The development of fast switch with intelligent operation function has become the main development direction of switchgear in power system. The high voltage circuit breaker plays an important protective role in the power system and provides strong guarantee for the reliable operation of the national power grid [1]. The controller can realize the basic functions of voltage charge and discharge management, opening and closing control, and realize the function of opening and closing position detection and voltage undervoltage lockout alarm, which further improves the reliability of the system
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