Control method of ecpt system output voltage stabilization based on nsga-Ⅱ parameter optimization

Abstract

The invention discloses an ECPT system output voltage stability control method based on NSGA-II parameter optimization. A PID controller is adopted for conducting output voltage stability control on an ECPT system, a broad sense state space average model of the ECPT system is established, and based on the model, the method through which the NSGA-II multi-objective and multi-constraint genetic algorithm is utilized for conducting automatic optimization on control parameters of the PID controller is put forward. According to the optimization method, a group of optimal PID control parameters are searched out automatically under the multi-objective and multi-constraint condition, it is guaranteed that under the action of the PID controller and when the ECPT system load and transmission distance are varied within a certain range, the output voltage of a closed-loop system can still maintain the effect that the uprising time is short, the steady state error is small, and the Robust performance is good, thereby the Robust performance and transmission performance of the ECPT system are improved.

Description

technical field [0001] The invention relates to the technical field of electric field coupling type wireless power transmission, in particular to an ECPT system output voltage stabilization control method based on NSGA-II parameter optimization. Background technique [0002] After years of development, Wireless Power Transfer (WPT) technology has achieved a series of achievements in theory and engineering applications. This power transmission method can realize the transmission of power without direct electrical connection from the donor to the acceptor, thereby eliminating the problems of messy wiring, wire wear, and contact sparks that exist in the traditional contact power transmission method. Therefore, the wireless power transmission technology is especially suitable for electrical occasions with strict safety requirements and complex working environments, such as humid, flammable, explosive and other working environments. In the field of wireless power transfer techno...

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Problems solved by technology

[0004] Although in terms of basic theoretical analysis, ICPT technology and ECPT technology have a certain similarity and duality, but due to the characteristics of ECPT system itself, such as high operating frequency and sensitivity to system parameter changes, it is difficult to study the output control strategy.

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