An Active Disturbance Rejection Controller for Linear Motor Operating Mechanism of High Voltage Circuit Breaker

Abstract

The present invention relates to an active disturbance rejection controller for a linear motor operating mechanism of a high-voltage circuit breaker, which is characterized in that the controller includes: an ADRR position module, an ADRR speed module, and the ADRR position control module and The ADRR speed control module is connected in series, the output of the ADRR position control module is used as the given speed input of the ADRR speed control module, and the ADRR position control module and the ADRR speed control module are composed of a tracking differentiator, Nonlinear extended state observer and nonlinear error feedback control rate formation. The present invention applies the non-linear active disturbance rejection technology to the control of the operating mechanism of the high-voltage circuit breaker, improves the response speed, reduces the impact force, and prolongs the electrical life of the contacts; the system is designed as a three-closed-loop system, and the position loop and the speed loop adopt automatic The anti-disturbance control technology can suppress the thrust ripple disturbance and friction disturbance in real time, reduce the impact of the end effect on the motor output, and solve the contradiction between the dynamic performance and overshoot of the operating mechanism.

Description

[0001] Technical field: [0002] 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. [0003] Background technique: [0004] 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 ...

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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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