Abstract
The extensive usage of power electronic components creates harmonics in the voltage and current, because of which, the quality of delivered power gets affected. Therefore, it is essential to improve the quality of power, as we reveal in this paper. The problems of load voltage, source current, and power factors are mitigated by utilizing the unified power flow controller (UPFC), in which a combination of series and shunt converters are combined through a DC-link capacitor. To retain the link voltage and to maximize the delivered power, a PV module is introduced with a high gain converter, named the switched clamped diode boost (SCDB) converter, in which the grey wolf optimization (GWO) algorithm is instigated for tracking the maximum power. To retain the link-voltage of the capacitor, the artificial neural network (ANN) is implemented. A proper control of UPFC is highly essential, which is achieved by the reference current generation with the aid of a hybrid algorithm. A genetic algorithm, hybridized with the radial basis function neural network (RBFNN), is utilized for the generation of a switching sequence, and the generated pulse has been given to both the series and shunt converters through the PWM generator. Thus, the source current and load voltage harmonics are mitigated with reactive power compensation, which results in attaining a unity power factor. The projected methodology is simulated by MATLAB and it is perceived that the total harmonic distortion (THD) of 0.84% is attained, with almost a unity power factor, and this is validated with FPGA Spartan 6E hardware.
Highlights
In commercial and domestic sectors, the usage of power electronic components have increased, which has led to end-users facing problems regarding the quality of power delivered; there arises a need to solve the power quality (PQ) problems
Enhancing the quality of power is achieved by utilizing unified power flow controller (UPFC), which includes series and shunt converters that are interconnected by a direct current (DC)-link capacitor; which assists in storing energy when connected to the supply
A reference current generation scheme is necessary by which the harmonics that occur in the load voltage and source current are minimized
Summary
In commercial and domestic sectors, the usage of power electronic components have increased, which has led to end-users facing problems regarding the quality of power delivered; there arises a need to solve the power quality (PQ) problems. Some of the common PQ problems, which have emerged in the distribution side and the grid side, are voltage sag/swell, harmonics, flickers, outage, etc., and all these disturbances have to be mitigated [1,2,3]. One key solution for these disturbances is the application of flexible AC transmission system (FACTS) devices, through which the quality of power has been enriched and the survey reveals the usage of various FACTS devices. Static VAR compensators (SVCs) are applied to enhance transient stability, through which the system losses are minimized. The operation of a thyristor controlled series capacitor (TCSC) is to enrich the power flow, as well as the transient and dynamic stability in the system [4], which is applicable for subsynchronous oscillations [5]. The static synchronous compensator (STATCOM) offers more enhanced damping characteristics than
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