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A two-stage cascaded converter is formed by connecting two subconverters in series. Output impedance of one subconverter will, therefore, interact with input impedance of the other subconverter. Such interaction may affect the system dynamics and stability, especially when one subconverter is constant-power-controlled, and hence, has different impedance characteristics when its power reverses. To lessen such constant-power effects, a control scheme that can coordinate impedance behaviors of the two subconverters is proposed. The idea is to reshape the low-frequency negative impedance of the constant-power subconverter to a positive resistance needed for neutralizing stability differences between the two directions of power flow. A smooth power reversal can thus be ensured, as verified through simulations and experiments performed with a scaled-down 400-W laboratory prototype.