Investigation of multifunctional grid-tied PV inverter with even and odd order harmonic mitigation using active and harmonic power weight control strategy

Even order harmonics have been introduced into power systems as a result of the ongoing development of microelectronic and chip technology, which has led to the design of more intelligent power electronic equipment. Harmonics can cause electromagnetic interference (EMI), leading to increased temperatures in power electrical components and reduced system efficiency. This paper proposes a multifunctional PV interleaved inverter with an active and harmonic power weight (AHPW) control approach to solve the aforementioned problems. The proposed approach estimates the active power generated by the PV plant and sends it to the grid without any phase delay. Furthermore, it extracts the harmonically weighted components of the loads and uses them to generate the reference currents. The AHPW method only uses three mathematical operators, reducing the burden on the controller and ensuring speed and reliability. The proposed system utilizes a complex vector filter (CVF) to extract the fundamental component from the distorted grid voltages. This enhances grid synchronization and multi-functionality. The proposed PV system is developed using the MATLAB (R)/Simulink (R) environment to evaluate its performance in different scenarios involving PV, load, and grid power supply. Its performance is then compared to the LMS and LAD control strategies. The simulation results show that the proposed control algorithm and interleaved inverter system effectively address even order harmonics, eliminate EMI problems, and provide active power to the grid without phase delay.