Simulink model of bidirectional EV charger discharges battery instead of charging, despite matching paper's parameters

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hemanth
hemanth 2025-10-5，7:21
Hello,
I am trying to replicate the IEEE paper "Bidirectional Power Control of Solar PV array and DABs Based Charger for Electric Vehicles" (DOI: 10.1109/SeFeT55524.2022.9909374) in Simulink, but my battery is discharging instead of charging.
I have systematically verified all parameters against the paper:
  • PV Array & Boost Converter: All parameters match Table I (10kW, 290V, L=2.2mH, C=10mF).
  • DAB Transformer: V1=330V, V2=172V, f=32kHz, and a separate series leakage inductance of 40uH, matching Table II.
  • Controller: To simplify debugging, I am using an open-loop controller with a Pulse Generator (Period = 1/32000, Pulse Width = 50%) and a Variable Transport Delay to create a manual phase shift.
  • Solver: The solver is a Fixed-step ode3 with a step size of 3.125e-7.
Despite these corrections, the battery's State of Charge (SOC) continues to decrease regardless of the phase shift command (I have tried both positive and negative values). I have attached my .slx model file.
Can anyone see what might be wrong?

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