Dynamic voltage restorer using nonlinear adaptive controlling and control strategy thereof

Abstract

The invention discloses a dynamic voltage restorer using nonlinear adaptive controlling and a control strategy thereof. The dynamic voltage restorer settles problems of high model precision requirement and requirement for total state quantity feedback in an existing feedback linear control method. The control strategy comprises the steps of based on a mathematical physical model of a dynamic voltage restorer (DVR), through input-output linear calculation, performing derivation for obtaining an original input-output equation of the dynamic voltage restorer (DVR); then, through defining an interference item and designing a high-gain observer, estimating all uncertainties and time-varying dynamics existing in the dynamic voltage restorer (DVR); afterwards, by means of the interference item which is obtained through estimation, compensating a nonlinear part in the actual dynamic voltage restorer (DVR), thereby obtaining a new input-output equation of the dynamic voltage restorer (DVR); and finally, designing a linear control rate, thereby realizing adaptive feedback linear controlling.

Description

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AI Technical Summary

Benefits of technology

This technology allows for more efficient use of power by controlling an electric device's motor speed or torque level through adjustment signals sent from another source instead relying solely upon its actual values. It also includes techniques like predictability analysis and error detection algorithms to improve reliance over these variables during operation. Overall this results improved efficiency and performance of electrical devices such as motors.

Problems solved by technology

This patents describes improves upon conventional techniques used during designing and operating a wind power plant's controller. These improvements include modifications made to the inner control strategies or addition of new components like energy stores or filters. However, these changes may affect the performance of certain parts within the wind power station itself due to their own characteristics. Therefore, they cannot be easily applied without also considering how well this improvement works over time.

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