Active and reactive power management of grid connected photovoltaic system

Abstract

<span>Voltage-source converter (VSC) topology is widely used for grid interfacing of distributed generation (DG) systems such as the photovoltaic system (PV). Since the operation of the VSC is essential to ensure quality of active and reactive power injected to the grid, a control approach is needed to deal with the uncertainties in the grid such as faults. This paper presents a non-linear controller design for a three-phase voltage source converter (VSC). The dynamic variables adopted for the VSC are the instantaneous real and reactive power components. The control approach that interface the VSC between the PV system and the grid are subjected to the current-voltage based. PV system injects active power to the grid and local load while utility grid monitors the power compensation of load reactive power. The proposed non-linear control strategy is implemented for the VSC to ensure fast error tracking and finite convergence time. The adaptive nature of the proposed non-linear control provides more robustness, less sluggish fault recovery compared to conventional PI control. The comprehensive numerical model is demonstrated in MATLAB script environment with power system disturbances such as faults in the grid. The simulation of proposed system is being carried out in MATLAB/SIMULINK environment to validate the control scheme. The proposed control system regulates the VSC ac side real and reactive power component and the dc side voltage.</span>

Simulation of adaptive gain control via 2-D lookup table for isolated hybrid micro-grid system

“…In the micro-grid system, the sources can be non-inertia distributed generations (DG) interfaced through voltage source converter (VSC) or inertial DG such as synchronous generator (SG). The energy produced can be delivered to the local loads within the micro-grid structure or exported to the utility grid [2]. Synchronous power generators are commonly used to provide power to distant and isolated regions where grid expansion is expensive due to economic and technical constraints [3].…”

Energy harvesting maximization by integration of distributed generation based on economic benefits

“…Many research objectives in DG planning based on the single objective index (SOI) almost as if it were real power or Indonesian J Elec Eng & Comp Sci ISSN: 2502-4752  Energy harvesting maximization by integration of distributed generation … (Tarek A. Boghdady) 611 minimizing the energy loss of the DS and not taking note of the merits of the sum of the weighted multiobjectives index (MOI), such as energy loss minimization, voltage profile enhancement and total cost reduction of the DS. A new proposed optimization technique is proposed for location and how to size the DG in DS with a changed loading conditions for minimization of real power loss of the system, is proposed in [5]- [7]. The MOI of performance for DS with DG, which includes a wide range of electric technical problems, is proposed in [8].…”

Fuzzy logic control of active and reactive power for a grid-connected photovoltaic system using a three-level neutral-point-clamped inverter

“…al. [7] proposed a nonlinear control of a PV grid-connected system that uses instantaneous active and reactive power components as dynamic variables. The method has some advantages to the aforementioned methods but in a presence of a three-phase fault, the system exhibits a high voltage peak at the AC side.…”