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utility-interactive inverter

utility-interactive inverter

utility-interactive inverter

(OP)
hello, i read this one in the nec, and it says there "An inverter intended for use in parallel
with an electric utility to supply common loads and sometimes deliver power to the utility" .I wonder how an inverter can operate parallel with a grid, is it parallel or go in  parallel (waiting  in parallel ) when needed by grid? Can inverters work in parallel with  grids? İt seems a bit weird...

RE: utility-interactive inverter

Solar generation and quite a few wind turbine designs use grid tie inverters. On a (much) larger scale, HVDC power transmission schemes use inverters to connect to the transmission system. Not at all unusual these days.
 
  

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If we learn from our mistakes I'm getting a great education!
 

RE: utility-interactive inverter

The inverter sources energy to the grid. In parallel means it's voltage is set to the level necessary for energy to flow from the inverter's energy supply to the grid. Like PFC capacitors are connected parallel to grid so they source reactive power to the grid.

Neil

RE: utility-interactive inverter

(OP)
excuse me ,as far as i got it means the inverter takes the energy from renewable sources and since it is connected to the grid it feeds the grid is it true? there is a one way energy flow then? is there any scheme to be more clear? when i heard it for the first time i had thought that there is a load and the inverter and the grid feeds it, i think it is completely different from what i thought...

RE: utility-interactive inverter

Consumer near the inverter will get their power from the inverter and from the grid, so the inverter and the grid will feed them in paralel.

RE: utility-interactive inverter

Wikipedia has a decent article on grid-tie inverters.

For renewable energy applications, they are generally one-way devices. All DC energy (less losses) is inverted and exported to the "grid". Concurrently, the customer takes whatever they need from the same grid connection.

Alan
"The engineer's first problem in any design situation is to discover what the problem really is." Unk.

RE: utility-interactive inverter

  
Applicable standards for small 'grid-tie' inverters are IEEE 929 AND UL 1741.
  
 

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