Wind energy is one of the extra ordinary sources of renewable energy due to its clean character and free availability. We used a static synchronous compensator (STATCOM) to supply the reactive power and voltage support to a wind farm equipped with Induction Generators(IGs) and power system during grid faults. Also, the STATCOM is used in steady state to supply reactive power in power system. Simulation results show that the wind turbine bus voltage is quickly reestablished shortly after the fault has been cleared, and therefore, the wind turbine remains in service during the presence of STATCOM. The results prove the effectiveness of the proposed STATCOM controller in terms of fast damping the power system oscillations and restoring the power system stability. The choice of this study is justified by simulation in MATLAB. پرونده مقاله

Applying distributed energy resources (DERs) to power systems has been promoted as a promising option to meet the growing electricity demand. Despite significant economic, environmental, and resiliency benefits, integrating DER, including power electronic devices, into the existing power networks causes stability and power quality issues. Therefore, to meet stability and power quality standard limits, a sort of compensation using cost-effective and energy-efficient technologies and power electronics-based concepts is needed. This paper presents a novel configuration of compensating type custom power devices (CPDs) and fault current limiters (FCLs) for limiting balanced and unbalanced faults and improving the transient performance of distributed generation (DG) sources in a hybrid power system. Moreover, three power grid operational scenarios are addressed to reflect the impact of the type of fault and variable power generation capacity of DGs on transient stability. Four configurations are implemented using two FCLs (BFCL and SFCL) and two energy compensation devices (DVR and UPQC). The transient performance of involved DGs with and without applying proposed compensation methods is simulated. Simulation experiments were carried out using MATLAB/SIMULINK software. The simulation results indicate that UPQC- BFCL is the best solution in all scenarios that improve the transient stability of the proposed power system under both balanced and unbalanced faults. پرونده مقاله