Synchronization is the key part to ensure high performance of grid-connected systems. Phase-locked loop (PLL) one most popular synchronizations due its simple implementation and robustness under certain grid variations. Particularly, in single-phase applications, PLL based on second-order generalized integrator (SOGI-PLL) widely used because structure, filtering ability frequency adaptability. ...

As the penetration of renewable energy increases year by year, risk high-frequency oscillation instability when a three-phase, four-wire split capacitor inverter (TFSCI) is connected to grid with complementary capacitors in weak grids. Compared three-wire inverter, TFSCI has an additional zero-sequence current loop. To improve accuracy modeling and stability analysis, effect loop needs be consi...

A solar photovoltaic distribution static compensator (SPV-DSTATCOM) under partial shading condition (PSC) is studied using a single-stage, 3-phase grid-connected mode. Under PSC, the performance of SPV-DSTATCOM and addressed issues such as active current sharing, reactive power control, harmonic elimination. Rejection DC offset with PSC an issue when conventional Proportional Resonant (PR) cont...

This paper investigates the parallel harmonic resonance problem for hybrid compensation systems, consisting of active power filters and thyristor-switched capacitors, proposes an adaptive composite control strategy solving that may arise in practical applications systems. In practice, a system can effectively solve reactive problems, but equivalent reactance capacitor supply line form resonant ...

This work develops the analysis of power quality by H-bridge Static Distribution Compensator (DSTATCOM) as well its control techniques in different industry-based loading conditions. The function DSTATCOM is to diminish problems arising due commercial industrial loads. For reference current extraction, novel Icos? and proposed enhanced SRF SOGI-FLL (synchronous frame second-order generalized in...

Abstract: This paper addresses the stability issue of the meshed DC distributed power systems (DPS) with constant power loads (CPLs) and proposes a stability enhancement method based on virtual harmonic resistance. In previous researches, the network dynamics of the meshed DC DPS are often ignored, which affects the derivation of the equivalent system impendence. In addition, few of them have c...

This paper presents a comparative study between two maximum power point tracking (MPPT) algorithms, the incremental conductance algorithm (InC) and fuzzy logic controller (FLC). The algorithms were applied to low photovoltaic conversion system, they both use different PI controllers grid synchronization techniques. Moreover, InC FLC methods have Clarke Park Transformation. To some extent, appro...