Adrian...
Nope.
Only voltage superiority injects power.
The frequency can't be tampered with -- such would create crazy harmonics.
The inverter sends power to the system by staying entirely in synch...
But at a trivially higher voltage. That's all it takes.
Because of voltage drop over distance -- the local loads will 'feel' the PV first.
Only after they are saturated by the PV array will enough 'over-voltage' remain for energy ( joules ; watt-seconds ) ever make it out into the grid.
Leading the Poco's frequency absolutely DOES NOT WORK. Instead, you would impose a harmonic upon the grid...
Something that would draw finger wags from the Poco.
