DSOGI with proportional resonance controlled CHB inverter based two‐stage exalted photovoltaic integration in power system with power quality enhancement. Issue 16 (24th November 2020)

• Record Type: Journal Article
• Authors: Nirmal Mukundan, C.M.; Jayaprakash, P.
• Is Part Of: IET renewable power generation. Volume 14:Issue 16(2020)
• Page Start: 3126
• Page End: 3137
• Publication Date: 2020-11-24
• Subjects: invertors -- power supply quality -- power grids -- power harmonic filters -- photovoltaic power systems -- power generation control -- active filters -- solar power -- power system stability; proportional resonance -- two‐stage exalted photovoltaic integration -- power quality enhancement -- two‐stage grid‐integrated solar photovoltaic system -- SPVS -- cascaded H‐bridge multilevel inverter -- distribution system -- five‐level CHBMLI -- balanced power‐sharing -- equal switch stress mode -- system power rating -- power conversion efficiency -- reduced switching frequency operation -- two‐level inverters -- critical damping -- system oscillations -- dynamic operating conditions -- power electronic switches -- high power operation -- nominal grid frequency -- PV panels -- system configuration -- grid synchronisation -- controlled CHB inverter -- damped second‐order generalised integral control -- DSOGI control -- bandpass filtering -- single‐input multiple‐output single‐ended primary inductance converter -- isolated DC sources -- centralised incremental conductance algorithm -- nonlinear unbalanced loads -- common coupling -- shunt active filter -- voltage sensors -- current sensors; Renewable energy sources -- Periodicals; 333.79405
• DOI: 10.1049/iet-rpg.2019.0255
• Languages: English
• ISSNs: 1752-1416

Abstract

Abstract : This study presents a grid‐integrated solar photovoltaic system (SPVS). The objective of the work is to explore the scope of cascaded H‐bridge multilevel inverter (CHBMLI) in the high infiltration of photovoltaic (PV) in the distribution system. A five‐level CHBMLI is implemented with a balanced power‐sharing and equal switch stress mode, which increases the system power rating with longer life. The power conversion efficiency is elevated by reduced switching frequency, compared to two‐level inverters. The damped second‐order generalised integral (DSOGI) control‐based grid synchronisation is used to critically damp system oscillations and overshoots at dynamic operating conditions. Hence, safer service of lower rating power electronic switches at high power operation is ensured. It also has better bandpass filtering at the nominal grid frequency. A single‐input multiple‐output single‐ended primary inductance converter realises the isolated DC sources for the CHBMLI. It extracts maximum power from the PV array by using centralised incremental conductance algorithm. The SPVS also considers the nonlinear unbalanced loads at the bus of common coupling and provide shunt active filter functionality. A minimum number of voltage and current sensors are used in the configuration. An extensive analysis is carried out to validate the theoretical claims.