Features and benefits of PV Inverter | Senergy

 

PV Inverter prediction systems are being urbanized that use algebraic methods as well as weather forecasts plus real time data from a grid of adjacent smaller residential PV sites to let for the commitment, scheduling as well as dispatching of conventional generation sources in a more economical method.

Smart PV inverters

Conventionally, PV inverters were deliberately intended to feed as much active power P (kW) as was accessible from the solar array at unity power factor into the point of common coupling (PCC). More lately, utilities as well as independent power providers have shown wonderful interest in the three phase inverter’s ability to also absorb as well as offer reactive power Q (kVAR) from and to the grid.

Over ninety-five percent of the time a PV inverter is running below its rated output current when converting DC solar power to AC active power. The idle capacity of the inverter can then be put to exploit to generate reactive power. The output of a smart PV inverter has both immediate as well as active AC currents that adjoin geometrically to the apparent power S, which will be limited by the current rating of the inverter.

The flow of active power P as well as reactive power Q in the grid can be considered as being independent from one another and largely requires diverse control schemes. Active power control is tied to controlling grid incidence, whereas reactive power control is associated with controlling the grid voltage.

Control of active power (kW) and frequency

In a transmission network, it is significant to keep the frequency as stable as probable because the major generating resources, all of which are synchronous machines, work at their most competent point at exactly 60Hz. Also, the speed governors on these machines must function in lock-step to share the generation load between machines to the particular schedule. For the frequency to remain stable the generated vigorous power must match the power demand at all times.