SHE Control for PV System Connected to the Grid

[...]We have developed a control of single-phase H-bridge inverter in order to eliminate the 3'd,5th,7th and 9th harmonics order, and added an LCLTo connect the PV inverter to the grid, an LCL betweenthe inverter and the grid. Various control strategies are proposed in literature to control the converters [14]-[16], including the space vector modulation (SVM), a PV system connected to the grid presents a PWM technic with shifted carrier, the sliding mode control (SMC) and a variable switching frequency (VSF) control technique [17], [18], which control each arm of a dual multilevel inverter [19], and a full wave control to eliminate the first selective harmonics [20]. selective harmonic eliminated pulse width modulation (SHEPWM), is a switching method to achieve minimum harmonic and total harmonic distortion [21], [22]. The main contribution is to have a perfect sinusoid for the grid current, thus we applied the P&O based MPPT algorithm to a boost converter in order to elevate the voltage generated by the photovoltaic modules, and a Newton-Raphson method to calculate switching angles in SHE technique, the proposed method was applied for the H-bridge single phase inverter to eliminate the 3rd, 5th, 7th and 9th harmonic. [...]a LCL filter has been used to eliminate current and voltage harmonics of the load connected between the inverter and the grid in order to satisfy the grid requirement. 2.System Modeling 2.1.PV Array The photovoltaic cell used has been described by Equation 1. [...]the output current and the output voltage are in phase which satisfies the IEEE requirement.