D-STATCOM based Voltage Compensator for a new Micro Hydro Power Generation Scheme Supplying Remote Areas

Abstract

This paper presents a new micro hydro power generation scheme using capacitor excited asynchronous generator and back to back converter. The scheme also considers variable turbine which rotates the generator at variable speed to generate variable AC voltage. The use of AC-DC-AC converter helps to convert the variable AC to DC and then to constant AC voltage and frequency. The design of control algorithms of the converter is based on the decoupled d-q control theory. The performance of the proposed scheme is analysed under resistive and inductive loads. The proposed model also has a D-STATCOM for regulating the output voltage at constant peak voltage during loading. The control principle of the D-STATCOM is based on a modified SRF theory and it has the ability to compensate unbalanced load current and load harmonics apart from regulating load voltage. The simulation is carried out with the help of MATLAB/Simulink and the power quality issues are also studied. The results show satisfactory performance of the proposed scheme.