Читать книгу Smart Solar PV Inverters with Advanced Grid Support Functionalities - Rajiv K. Varma - Страница 40

Line I²R heating losses are proportional to the current flow in the feeders. If the solar PV systems partially offset the line loading the losses will decrease [54, 55]. It is shown on an AEP network that low to moderate level of solar PV penetration tends to lower the line losses since the power produced by the solar PV systems tends to offset the load, and consequently, the import of current from the grid source reduces [56]. However, if the solar PV systems cause a net increase in line current the losses will increase. In some cases, the line losses with solar PV systems may become higher than the case with no solar PV systems installed [21]. These losses require increased power import over the lines to supply the same load, increased heating in lines resulting in faster aging, and decrease in lifespan of line infrastructure.