This paper presents a system of grid connected photovoltaic (PV) to the monitoring point of maximum power (MPPT). The voltage source inverter (VSI) is connected between the dc output of photovoltaic system and ac grid. The control strategy applied is based on theory of instantaneous reactive power (p-q theory). According to this proposed PV system send active power to the grid at the same time the reactive power of load and harmonics will eliminate at change in both irradiation and load condition. During no sunlight system is available only reactive power and harmonic compensation. The applicability of our system tested in simulation in Matlab / Simulink.
1. Grid-connected PV system
2. Instantaneous reactive power theory
4. Reactive power compensation
5. Power quality
Fig. 1. Proposed Grid Connected PV System
EXPECTED SIMULATION RESULTS:
Fig. 2. Active Power of load, PV system and grid
Fig. 3. Reactive Power of load, PV system and grid
Fig. 5. Harmonic analysis with and without PV system
Fig. 6 Waveform of Grid Volatge and Current
Photovoltaic power seems to be the favorable clean energy source of the future. So, to optimize its use we have proposed a direct coupling of PV system to the grid. From the results obtained, it is proven that by using the proposed system, Photovoltaic power can be efficiently extracted by solar cells and injected into the grid and compensating reactive power of the load all 24 h of the day. The proposed system also compensates the harmonics content of nonlinear load. Finally, and according to the obtained results we can consider the proposed system to be efficient solution to the growing demand of power at the present and in the future.
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