Grid-connected photovoltaic power system Solar energy gathered by photovoltaic solar panels, intended for delivery to a power grid, must be conditioned, or processed for use, by a grid-connected inverter. Fundamentally, an inverter changes the DC input voltage from the PV to AC voltage for the grid. This inverter sits between the solar array and the grid, draws energy from each, and may be a large stand-alone unit or may be a collection of small inverters, each physically attached to individual solar panels. See AC Module. The inverter must monitor grid voltage, waveform, and frequency. One reason for monitoring is if the grid is dead
Galois module is only with respect to the discrete topology on "V", thus making the situation more algebraic in flavor. Galois module In mathematics, a Galois module is a "G"-module, with "G" being the Galois group of some extension of fields. The term Galois representation is frequently used when the "G"-module is a vector space over a field or a free module over a ring, but can also be used as a synonym for "G"-module. The study of Galois modules for extensions of local or global fields is an important tool in number theory. Let "K" be a valued field (with valuation