Abstract
The High Penetration of PV power into the existing electricity grid needs more study and analysis to enable safe operation. One of the major concerns is the impact of PV system on grid power quality .Poor power quality could cause disturbance and financial losses due to the use of power inverters. Harmonic distortion is a serious power quality problem that reduces power quality and consequently causes a number of problems to consumer and network. This Paper proposes a new strategy for power quality improvement in a three-phase grid connected PV Inverter with central and string configuration and controlling on them using Sinusoidal pulse width modulation and space vector modulation methods with LCL Filter .This paper investigates PV Inverter configuration and impact of them on PV Plant Performance and harmonics that produced by PV inverter. The design, modeling, and analysis of a grid-tied PV system were performed in the PSCAD software simulation environment. The simulations of Harmonic Distortion (Total Demand Distortion & Total Harmonic Distortion) were applied at Point of Coming Coupling and the results obtained were compared with the limits specified by IEEE STD 519-1992 standards.
Highlights
Due to increases in energy demand, fossil fuel problems such as fossil fuel depletion, CO2 emissions and the use of solar energy is growing fast. This Paper Studies the effect of photovoltaic tied to Electric grid System on the power quality under weather conditions of Egypt by using realistic temperatures and solar irradiance data from The ASHRAE International Weather for Energy Calculation. This Paper investigates the impact of PV Inverter Configuration (Central and String) with different controlling methods on inverter such as (Sinusoidal Pulse width Modulation and Space vector Modulation) from point of view PV plant efficiency and Electric Grid Quality
It is recommended by the previous standard that the harmonic distortion at the Point of Common Coupling (PCC), which is the point at which the PV system is tied with the grid, should comply with IEEE Std 519-1992 [11]
In order to explain the power quality problems that occur in the PV grid-tied system, there are several tests of central and string inverters using sinusoidal pulse width modulation controlling method and space vector modulation controlling method
Summary
Due to increases in energy demand, fossil fuel problems such as fossil fuel depletion, CO2 emissions and the use of solar energy is growing fast This Paper Studies the effect of photovoltaic tied to Electric grid System on the power quality under weather conditions of Egypt by using realistic temperatures and solar irradiance data from The ASHRAE International Weather for Energy Calculation. This Paper investigates the impact of PV Inverter Configuration (Central and String) with different controlling methods on inverter such as (Sinusoidal Pulse width Modulation and Space vector Modulation) from point of view PV plant efficiency and Electric Grid Quality.
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