Research On Photovoltaic Energy MPPT And Anti-islanding

With economic globalization and the rapid development of industrial. Global energy exhaustion and environmental pollution problem is currently restricted the human society sustainable development, two of the main culprits. Photovoltaic power system with its generating process zero pollution, zero noise, convenient maintenance and no production materials etc show the broad space for development and application prospect. Digital signal processor (DSP) have enabled a lot of advanced control method can be used in grid-connected photovoltaic control systems. The main research contents of this paper are:Based on photovoltaic battery simulation model of the PV array, the establishment of a solar maximum power point tracking system, the simulation model, then on two commonly used methods of the tracking the simulation analysis, the way and prove this thesis theoretical analysis.Phase locked loop technique let grid inverter current and grid voltage, frequency and phase of the same. This paper analyzes on digital signal processor chips based on the software phase locked loop technique, and combining with the actual application given the design plan and program flow chart.Solar photovoltaic grid power system must prevent islanding effect occurs, the paper analyzed active disturbance mode and passive disturbance mode are presented and the simulation model and simulation results. In view of the current shortage of test method,Proposed a two-way active frequency detection method.This paper was designed based on digital signal processor chip TMS320LF2407 single-phase two levels of solar photovoltaic grid power system, to verify the above methods effectiveness and superiority.