Leading Power Factor - Voltage drop

[scothoward]

Hi, I am hoping you can help me understand this concept.

I've always known that generators operating a leading power factor lowers voltage drop and a lagging power factor increases voltage rise (as seen here: http://books.google.ca/books?id=nIc... generator at a leading power factor"&f=false ), but never understood why.

How does the source/sink of VARs affect voltage rise/drop?

Thanks

 

[gnurf]

(That link doesn't work for me: "You have reached you viewing limit..." etc)

 

[dlgoff]

I've always known that generators operating a leading power factor lowers voltage drop and a lagging power factor increases voltage rise... but never understood why.

How does the source/sink of VARs affect voltage rise/drop?

I believe that the generators output voltage can be controlled. When the voltage is raised, VARs will be out of the generator and when it's lowered, VARs will be into the generator. But the output voltage would have to be kept a some nominal value so I guess the direction of the reactive power depends mostly on the system load.