Active-disturbance-rejection controller for high-voltage circuit breaker linear motor operation mechanism

Abstract

The invention relates to an active-disturbance-rejection controller for a high-voltage circuit breaker linear motor operation mechanism. The active-disturbance-rejection controller is characterized in that the controller comprises an active-disturbance-rejection position module and an active-disturbance-rejection speed module. The active-disturbance-rejection position control module is connected in series with the active-disturbance-rejection speed control module; the output of the active-disturbance-rejection position control module serves as the input of a given speed of the active-disturbance-rejection speed control module; and the active-disturbance-rejection position control module and the active-disturbance-rejection speed control module are respectively formed by a tracking differentiator, a nonlinear extended state observer and a nonlinear error feedback control law. The nonlinear active-disturbance-rejection technology is applied to the control of the high-voltage circuit breaker operation mechanism, thereby improving response speed, reducing impact force and prolonging electrical life of contacts; the system is designed into a three-closed-loop system, wherein the position loop and the speed loop adopt the active-disturbance-rejection control technology, so that thrust ripple disturbance and friction disturbance can be suppressed in real time, the influence of end effect on motor output is reduced, and the conflict between the operation mechanism dynamic property and overshoot performance is solved.

Description

Technical field: [0001] The invention provides an active disturbance rejection controller for a linear motor of a high-voltage circuit breaker, which is suitable for the operation control of a high-voltage circuit breaker with good dynamic performance and high reliability requirements, and belongs to the technical field of high-voltage electrical appliances. Background technique: [0002] The investigation and research of China Electric Power Research Institute shows that among the 4632 failures of high-voltage circuit breakers between 1989 and 1997, the failure caused by the operating mechanism (including mechanical parts and electrical control circuits) is the main cause of failure of high-voltage circuit breakers. Among them, mechanical failure (39.3%) accounted for the main part. Since the price of high-voltage circuit breakers is much lower than that of protected equipment such as generators and transformers, the losses caused by failures, such as damage to other electr...

AI Technical Summary

Problems solved by technology

However, the friction model parameter identification needs to be carried out offline. The actual situation of the circuit breaker when it is running online is different from that of offline operation. Using offline identification parameters will introduce inaccuracies instead; and such a high positioning accuracy is not required in this specific application environment

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