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

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.

Advanced control scheme and dynamic phasor modelling of grid‐tied droop‐controlled inverters

“…Unfortunately, the commonly applied method for power calculations in droop-controlled gridinteractive inverters is based on a low-pass filter (LPF) to achieve the average power. The major drawback of this method is the lack of speed since an LPF with a low cutoff frequency is required to reject the undesirable distortions [8]. This issue may degrade the control performance, thus threatening the correct operation of grid-connected inverters.…”

Hardware-in-the-Loop and Digital Control Techniques Applied to Single-Phase PFC Converters

“…Beyond that, different electrical and non-electrical systems are emulated on which a control action is validated through the HIL concept [16]. So this can be configured to emulate plants of different applications of electronic systems such as smart grids [17,18] and power converters [19][20][21], more specifically in PFCs [22,23].…”

System Level Simulation of Microgrid Power Electronic Systems

“…If the network limits are exceeded, in extreme cases, the power supply is interrupted a so-called distribution system ʺblackoutʺ. The solution to this problem could be a new generation network, i.e., a ʺsmart gridʺ [1][2][3][4].…”