Net metering laws and other stuff...
Okay, first of all, if you're talking about putting up two 100-200kw wind turbines, AND you want to be able to market your power back to the utility company, better to save the investment of two, and just put up one turbine of at least 1.5Mw. The biggest investment starts with the foundation and power handling infrastructure.
Next, read up on your state's utility laws- look for 'renewable energy' references. Virtually every state has some sort of provision for granting tax incentives for a utility company's sale of electricity SOURCED from renewable generation... meaning, hydroelectric, wind, solar, geothermal, etc. This is why many electric utility companies have installed a few wind turbines, but MOST will simply BUY power from hydroelectric authorities and managed 'wind farms'. They re-sell this power, and claim their credit.
Next... realize that by attempting to connect to the utility grid for purpose of putting IN power, that makes you an "Independant Power Producer"... you're an electric utility company. That means your utility company now becomes YOUR customer for those times when you HAVE power to sell, and you become THEIR customer when not. Your utility company probably has a substantial host of 'rules', and unless your state has passed 'net metering' laws, they'll highly discourage having you as both a supplier AND customer.
Net Metering- that's when the utility company lets you 'hook in' your generation system using a 'simplified' system, in both electrical technique, and in business policy. If you have a turbine that provides substantial power say... three days a week... for that three days, your meter will turn backwards... and in the other days, it will spin forwards (perhaps not physically, but that's the concept). In effect, you only wind up paying for what you USE, because when not, you're offsetting your use by what you put back. Net metering in this fashion facilitates a more-palatable business scenario for utility companies simply because they're absolved from having to differentiate between what you've supplied, and what you've used... and furthermore, they're usually 'more free' to get your power at a more profitable cost to THEM... this is primarily because many regulations allow RENEWABLE POWER prices (on the live-utility markets) to be a little bit, and sometimes alot higher than fossil or nuke.
It also makes it easier for utilities to make simple billing- you pay for what you use, and what you generate in excess, gets sold as regular utility elsewhere, and the power-value gets 'banked' for the times when you need it back.
Now, if you want to use that free wind, can put down enough coins to buy a 20kw+ turbine and it's foundation, you can bypass all the garbage and simply make best use on-your-own.
How?
By converting it to something you can either use immediately, or store later. Yeah, batteries come to mind, but when you've got a windy day, and the batteries are charged, you'll end up losing out on good opportunity.
So how?
First... set up your shop so that you can transfer SOME of your electric loads from utility power to the wind turbine. Preferably steady loads, 'cause you'll have steady winds.
Next, put it where it'll count the most. Let's say it's wintertime... wind is blowing, and you're burning natural gas, propane, heating oil... whatever... Instead of doing that, have the generator run a big resistive heater... heat water to warm your shop floors... and in turn, save money on fossil fuels. Let the turbine run your lights at night, and during the heat of summer, run the blowers and compressors of your air-conditioning system. Again, put these (all but resistive water heaters) on transfer switches, so you can switch back to utility mains when there's no breeze.
What you'll find, is that you'll get the highest full-load use of your wind power, when it's most available... not in dealing with selling back electricity, but by reducing the purchase of fuels. By side-stepping a whole mess of regulations, policies, and investing in a whole bunch of ridiculously expensive switchgear, metering equipment, insurance, and paperwork, your gross investment will be much lower, and you'll be making best use of every last watt your turbine can generate.