Abstract
As a power electronic converter, DC/DC converter plays a pivotal role in power electronic system. By measuring G -parameter frequency data, people can extract information to identify the converter, building two-port ‘black-box’ model, thereby improving system-level simulation and analysis. Paper takes the 270–28 V DC/DC phase-shifted full-bridge converter of multi-electric aircraft distributed power supply system as study object, implements hardware design of the converter with high performance of loop and respond, and verificating the design by Saber simulation. Paper analysis ways of measuring converter's frequency response, considering injection strength of disturbance signal and interaction of subsystem, paper gives advices that experimenter should add input filter and use constant current source load. Base on Levy method, paper calculates corresponding G -parameter transfer function of converter by Matlab, builds ‘black-box’ model, then verifies the result by Matlab time domain simulation. Paper's research results will have great impact on the integration and optimisation of power electronic systems.
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