Modified Adrc-based Current Loop Disturbance Suppression Of Dual Three-phase Permanent Magnet Synchronous Generator

In order to accelerate the strategic adjustment of China’s industrial energy structure under the background of the new era and promote the multi-electric development of special equipment such as all-electric ships and electric aircraft,the demand for generator rectification system is increasing.Compared with the traditional three-phase generator,the multi-phase generator has the advantages of low voltage and high-power output,high fault tolerance,low torque ripple and so on,widely used in the high-end equipment equipped with the generator set and the new energy field such as high-power wind power generation.However,the high-performance control of generator rectifier system is greatly affected by the slow dynamic response caused by current coupling and the increase of system loss caused by harmonic current.In view of the above problems,this paper takes the dual-three phase permanent magnet synchronous generator(PMSG)as the research object,and conducts in-depth theoretical research,simulation analysis and experimental verification in terms of mathematical modeling,d-q subspace current decoupling method and x-y subspace harmonic current suppression method,in order to improve the current loop control performance of the generator rectifier system and further improve the quality of DC power supply.The main research contents of this paper are as follows:Firstly,the topology and generator winding characteristics of dual three-phase PMSG rectifier power generation system are introduced,the basic mathematical model of generator is established,and the two coordinate transformation theories based on double d-q decoupling transformation and vector space decoupling(VSD)transformation and the mathematical model of dual-three-phase PMSG in synchronous rotation coordinate system are derived,and the vector control strategies based on two different coordinate transformations are analyzed and compared.Secondly,the dynamic coupling terms of dual three-phase PMSG fundamental subspace based on VSD transformation is analyzed,several traditional current decoupling controllers are introduced,and their decoupling limitations are also elaborated.Aiming at the problem of insufficient decoupling performance of traditional proportional integral control and traditional decoupling method,this paper proposes an active disturbance rejection current decoupling control based on model compensation to achieve complete decoupling of d and q axis currents,and the effectiveness of the control strategy is verified by simulation.Then,the harmonic current disturbance in the harmonic subspace of dual three-phase PMSG based on VSD transform is analyzed.Aiming at the problem that linear active disturbance rejection control(LADRC)has insufficient suppression ability to periodic disturbance,propose to improve the ability of LADRC to suppress 5th and 7th harmonic currents of the generator through parallel quasi resonant units,and the effectiveness of the control strategy is verified by simulation.Finally,the experimental platform of dual three-phase PMSG rectifier power generation system based on TMS320F28377 S main control chip is built and the key hardware circuit design and core software implementation process are briefly introduced,and the two modified LADRC strategies are verified by experiment platform.