There is a lot more to this than just the inverters. It is an enormous control system problem, with many many parameters, some of which are unknown. An Inverter connected to a windmill must take all the available output and get it into the grid cycle by cycle. The blade angle has a control system to adjust the blade angle, but this is much too slow to deal with wind gusts immediately. If the grid load does not match the blade speed, they will speed up, but slowly due to the huge inertia. Gas turbines are also not known for their immediate response to more fuel (heat) and must be synchronous anyway. The same goes for steam turbines, but here the limiting factor is probably rotor inertia. There are also time delays due to distribution systems and consumers loads, particularly if these are large rotating machines. There is a huge problem with batteries, some of it due to the required inverters, as well as the chemical problem of short extremely large charge and discharge cycles, perhaps even at the inverter switching frequency, perhaps 20-50 kHz. Overall large amounts of wind power are a pretty bad idea, unless we have nice constant winds, which are somewhat unusual at many of the wind sites. Wind companies are not very interested in further development unless government makes large subsidies, overall costs are higher than expected and in many cases revenue lower. The person who solves this lot is quite likely to end up fairly rich, so who is volunteering?

There is a lot more to this than just the inverters. It is an enormous control system problem, with many many parameters, some of which are unknown. An Inverter connected to a windmill must take all the available output and get it into the grid cycle by cycle. The blade angle has a control system to adjust the blade angle, but this is much too slow to deal with wind gusts immediately. If the grid load does not match the blade speed, they will speed up, but slowly due to the huge inertia. Gas turbines are also not known for their immediate response to more fuel (heat) and must be synchronous anyway. The same goes for steam turbines, but here the limiting factor is probably rotor inertia. There are also time delays due to distribution systems and consumers loads, particularly if these are large rotating machines. There is a huge problem with batteries, some of it due to the required inverters, as well as the chemical problem of short extremely large charge and discharge cycles, perhaps even at the inverter switching frequency, perhaps 20-50 kHz. Overall large amounts of wind power are a pretty bad idea, unless we have nice constant winds, which are somewhat unusual at many of the wind sites. Wind companies are not very interested in further development unless government makes large subsidies, overall costs are higher than expected and in many cases revenue lower. The person who solves this lot is quite likely to end up fairly rich, so who is volunteering?