You need "wind turbine controller" that support your maximum power capacity.. That controller must have battery charging indikator that normally has Green Light n Red colour for battery not in charging but ready to use for power something... That controller has built in voltage regulator to control cut in and cut off voltage for charging the battery in range 13.5 to 14.5V.....to ensure not over charging...the Best need the proper wiring n manual for that controller.. Some controller from china not provide the detail.. Just give a piece of paper circuit.. No manual.. Since it so simple to use...

Dear Sir, Thank you so much for your reply, actually i am working on MATLAB Simulation and in HIGH Speed region i need to design controller such as MPC, SMC or H infinity controller in order to limit rated power and speed of Generator such that synchronization should be maintained without any cutoff.

Cut off means for maximum voltage to no exceed ~15V...no any effect for rpm limit

The machine-side converter regulates the synchronous machine in a PMSG system. The machine-side converter's controller typically consists of two nested loops: an outer, slower loop for managing torque and/or stator reactive power and an inner, faster loop for controlling the stator d- or q-axis currents.

Hello,

Typically, when the wind speed exceeds 20m/s, we need to engage the pitch controller or yaw controller (or other) to limit the amount of wind energy we can collect.

Good luck