Electronic – How does a wind turbine protect the bank from a reversal in polarity when spin direction is reversed

You are forgetting that each turbine is connected to the grid, which is much larger than any one turbine. Each generator on the grid runs synchronously. Unless the turbines have variable transmissions, each turbine spins at the same rate. The one with more wind will have more torque, and hence more power, at the fixed speed. As long as there is positive torque on the generator shaft, the generator will be pushing power onto the grid. Some turbines will be pushing more power than others, but since the grid is essentially a infinite sink at this level, they aren't pushing each other.

I'm not sure using an N-channel MOSFET for Q1 makes a lot of sense in this application. For one thing, you're going to have to be careful that you don't exceed the maximum gate-source voltage — pulling the gate to +120V while the source is held at less than +22V is almost certainly too much. Any pulling the gate all the way to ground with +22V on the source may also be too much.

You'd probably be better off to use a P-channel MOSFET in this application, connecting its source to the generator, putting a 15V zener diode between the source and gate, and then pulling the gate down through a resistor when you want to enable (rather than disable) the charging.