I want to connect a single phase inverter to a increasing load via transmission line. What would be the effect on inverter output frequency if the load increase then available power? Will the frequency of the inverter starts decreasing as the load increases? Kindly also share some link.
An invert er is designed with a specific range of load variation immunity. If you consider the load which falls out of range would disturb your firing angles which ultimately turn your micro grid into a load to the Grid or may even become fault which trips the system out of GRID.
The short answer is that the system would collapse immediately.
However, you need to consider further how this system could run in the first place. For a micro-grid like this to operate, it needs the following to be connected via inverter(s):
a) a generation source
b) some form of frequency keeping / energy storage
The reason the system frequency decreases when the load exceeds the generation is due to the dynamics of synchronous generators which typically provide frequency-keeping in a power system. This is not applicable here. Unless synthetic frequency control is built-in to the inverter, the inverter simply follows the grid frequency. Hence the system as described is unstable and cannot operate.
Hope this helps, please find some links to useful information:
http://elforsk.se/Rapporter/?download=report&rid=13_02_
http://www.nrel.gov/docs/fy12osti/55335.pdf
http://www.epecentre.ac.nz/research/eea%20conference%20papers%202016/Josh%20Schipper_Value%20of%20Frequency%20Keeping.pdf
https://lirias.kuleuven.be/bitstream/123456789/345286/1/Grid_Inertia_and_Frequency_Contr
https://www.eeh.ee.ethz.ch/uploads/tx_ethpublications/telegina_MA_2015.pdf
An invert er is designed with a specific range of load variation immunity. If you consider the load which falls out of range would disturb your firing angles which ultimately turn your micro grid into a load to the Grid or may even become fault which trips the system out of GRID.
An inverter has a rated and a maximum output power. Assuming an 'island grid' (the inverter being the only source of power to the grid)' the frequency will not be affected. Instead, the voltage will sag with increasing load. 'til the inverter eventually switches off due to overload. Or some fuse trips.
Other than with rotating generators, the inverter output frequency has nothing to do with the load - it is completely synthetical.
- Badges
- Science topic
- Similar topics
- Engineering
- Electrical Engineering