Abstract
Integration of renewable energy resources and conventional grids leads to an increase in power quality issues. These power quality issues require different standards to be followed for accurate measurement and monitoring of various parameters of the power system. Conventional power quality analyzers (PQAs) are programmed to a particular standard and cannot be reconfigured by the end user. Therefore, conventional PQAs cannot meet the challenges of a rapidly changing grid. In this regard, a Compact RIO-based (CRIO-based) PQA was proposed, that can be easily reprogrammed and cope with the challenges faced by conventional PQAs. The salient features of the proposed PQA are a high processing speed, interactive interface, and high-quality data-storage capacity. Moreover, unlike conventional PQAs, the proposed PQA can be monitored remotely via the internet. In this research, a hardware-in-loop (HIL) simulation is used for performing the power-quality assessment in a systematic manner. Power quality indices such as apparent power, power factor, harmonics, frequency disturbance, inrush current, voltage sag and voltage swell are considered for validating the performance of the proposed PQA against the Fluke’s PQA 43-B.
Highlights
In order to compare the performance of the CRIO-based power quality (PQ) analyzer and traditional
The voltage THD and its spectra were measured as shown in Figures 10 and 11 using CRIO and the Fluke-based PQ analyzer, respectively
The proposed power quality analyzers (PQAs) can be modified or extended in a short period of time according to the latest international standards or any additional functionality required by the customer; its major limitation is that the customer should be familiar with the LabVIEW field programmable gate array (FPGA) in order to modify the functionalities
Summary
Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations. The use of a real-time simulation is essential for testing power converter applications as they may operate at a high switching frequency [8]. A complete PQ analysis requires the measurement of each phase of voltage and current in a three-phase four-wire system wherein voltages and currents must be perceived, measured, and analyzed with perfect spectral resolution and accuracy This means that the measuring instrument must be able to (I) evaluate the incoming frequency of the signals, (II) transform them into digital form; (III) calculate the FFTs in parallel in a very short duration of time (microseconds); (IV) detect and classify previously mentioned. A three-phase, three-level neutral point clamped (NPC) converter is used for the real-time simulation using the HIL environment.
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