HIL-Assessed Fast and Accurate Single-Phase Power Calculation Algorithm for Voltage Source Inverters Supplying to High Total Demand Distortion Nonlinear Loads

Jorge El Mariachet,Helena Martín,Jose Matas,Mingshen Li,Yajuan Guan,Josep M Guerrero

doi:10.3390/electronics9101643

Jorge El Mariachet, Helena Martín + Show 4 more

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https://doi.org/10.3390/electronics9101643

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Abstract

The dynamic performance of the local control of single-phase voltage source inverters (VSIs) can be degraded when supplying to nonlinear loads (NLLs) in microgrids. When this control is based on the droop principles, a proper calculation of the active and reactive averaged powers (P–Q) is essential for a proficient dynamic response against abrupt NLL changes. In this work, a VSI supplying to an NLL was studied, focusing the attention on the P–Q calculation stage. This stage first generated the direct and in-quadrature signals from the measured load current through a second-order generalized integrator (SOGI). Then, the instantaneous power quantities were obtained by multiplying each filtered current by the output voltage, and filtered later by utilizing a SOGI to acquire the averaged P–Q parameters. The proposed algorithm was compared with previous proposals, while keeping the active power steady-state ripple constant, which resulted in a faster calculation of the averaged active power. In this case, the steady-state averaged reactive power presented less ripple than the best proposal to which it was compared. When reducing the velocity of the proposed algorithm for the active power, it also showed a reduction in its steady-state ripple. Simulations, hardware-in-the-loop, and experimental tests were carried out to verify the effectiveness of the proposal.

Highlights

The Smart Grid, as a concept, can be defined in terms of its outcomes as an electrical system that operates in an efficient manner, that provides a reliable energy supply and a power quality for the needs of a digital economy, that demonstrates a resilient performance against uncertainties or grid faults, and that integrates a large variety of distributed energy resources (DERs) in the conventional electrical grid, especially renewable energy sources (RESs), according to the Department of Energy of the United
A similar similar steady-state steady-state ripple ripple for for the the active power calculation is set as a reference for the analysis
It is composed of a voltage source inverters (VSIs) Danfoss© FC302, 2.2 kW rated, interfaced to a real-time dSPACE

Summary

Introduction

Development Goals [3], the energy supply must be affordable, reliable, sustainable, and accessible for all users, especially when involving DERs based on RESs, as can be seen in References [4,5] These DERs can be composed of a mixture of energy production units, energy storage systems (ESSs), and loads that operate jointly in clusters that are connected or not to the main electrical grid infrastructure [6]. A specific type of MGs is the hybrid renewable MG (HRMG), which can be based on RESs and conventional generators to provide supply reliability against the intermittent nature of some RESs, such as photovoltaic, wind, and tidal energy, as seen in References [13,14,15,16] These HRMGs contribute to the desired resiliency of the grid in front of strong perturbations. In Reference [20], the impact of the lack of intercommunication between the distributed generators at all levels of control was analyzed by comparing diverse control methods, i.e., consensus-based, agent-based, decomposition-based, finite-time convergence control, aperiodic sampling, sliding mode control, and droop-based control

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