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
Shigatse Photovoltaic Power Plant by LDK Solar (60 MW), the other by Chaorisolar (10 MW). Shigatse Photovoltaic Power Plant The Shigatse Photovoltaic Power Plant () is located 3 km northwest of Shigatse, the second largest city in Tibet, China. It was connected to the grid in July 2011. The plant sits in the industrial photovoltaic area of Shigatse about 3 km northwest of the city in the Xigaze Prefecture, at an altitude of 3895 meters. According to Suntech CEO, “with intense sunlight and cool temperatures, Tibet is extremely well-suited for the utilisation of advanced photovoltaic technology”. Tibet has abundant solar energy with more than