Two-way energy storage converter analysis and control method related to nonlinear factors

The invention discloses a two-way energy storage converter analysis and control method related to nonlinear factors. Influences of the dead-zone effect, power tube saturated pressure drop and other nonlinear factors on a system are considered, storage battery voltage, power tube saturated pressure drop and the duty ratio of a dead zone serve as external variables, the error voltage caused by the nonlinear factors is calculated, the obtained error voltage serves as disturbance quantity and is introduced into voltage current double closed-loop control, expressions of open-circuit voltage, output impedance and a controlled voltage source in an equivalent circuit are calculated, and the direct current microgrid two-way energy storage converter equivalent circuit related to the nonlinear factors is obtained. The error voltage caused by the nonlinear factors are compensated, the equivalent circuit is approximate to the equivalent circuit in an actual direct current microgrid two-way energy storage converter, precis