Many breakthroughs in the laboratories often do not bridge gap between research and commercialization. However, silicon photonics bucked trend, with industry observers estimating commercial market to close on a billion dollars 2020 <xref ref-type="bibr" rid="ref45">[45]</xref>. Silicon leverages billions of decades poured into semiconductor device processing enable high yield, robust processing, most all, low cost. is also good optical material, transparency commercially important infrared...

This paper concentrates on the design, control, and implementation of an LCL-filter-based shunt active power filter (SAPF), which can effectively compensate for harmonic currents produced by nonlinear loads in a three-phase three-wire system. With LCL added at its output, proposed SAPF offers superior switching suppression using much reduced passive filtering elements. Its output thus have high slew rate tracking targeted reference closely. Smaller inductance also means smaller voltage drop...

In this paper, the practical string stability of both homogeneous and heterogeneous platoons adaptive cruise control (ACC) vehicles, which apply constant time headway spacing policy, is investigated by considering parasitic delays lags actuators sensors when building vehicle longitudinal dynamics model. The proposed law based on sliding-mode controller can guarantee stability, if parameters system meet certain requirements. analysis negative effect indicates that larger than lags. This paper...

This paper investigates the inherent damping characteristic of LCL- filters for three-phase grid-connected voltage source inverters. Specifically, it is found that when converter-side current used implementing feedback control, there will be an term embedded in control loop, which can neutralize resonance introduced by filters. Theoretical analysis then presented to suggest a general design guideline choosing values grid- and inductors, so optimum naturally achieved solely using converter...

Direct model predictive control (DMPC) is a promising alternative for power electronics and electric drives. It takes the switching nonlinearity of converters system constraints into consideration, without using an extra modulator. However, its one-switching-vector-per-control-interval character leads to big ripples variables. Therefore, with similar sampling frequency, steady-state performance not satisfying. In this paper, we propose multiple-vector direct (MV-DMPPC) concept grid-side...

Z-source inverters are recent topological options proposed for buck-boost energy conversion with a number of possible voltage- and current-type circuitries already reported in the literature. Comparing them, common feature noted is their inclusion an <i xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">LC</i> impedance network, placed between dc input source inverter bridge. This network allows output end voltage-type to be shorted voltage boosting...

Three-level Z-source inverters are recent single-stage topological solutions proposed for buck-boost energy conversion with all favorable advantages of three-level switching retained. Despite their effectiveness in achieving voltage conversion, existing use two LC impedance networks and isolated dc sources, which can significantly increase the overall system cost require a more complex modulator balancing network inductive boosting. Offering number less costly alternatives, this letter...

This paper proposes an adaptive dc-link voltage control method for the two-stage photovoltaic inverter during low ride-through (LVRT) operation period. The will be controlled to follow change of grid LVRT maintain high modulation ratio so that frequency harmonics injected into can attenuated significantly. Besides, when suffering asymmetrical faults, proposed could some extent attenuate double-line-frequency ripple keep in safe operational range by shifting power front-end dc input source,...

Traditional voltage-source inverter is limited by its only voltage step-down operation, while current-source current mode. In order to add an extra boosting flexibility keeping the number of active semiconductors unchanged, voltage-type and current-type Z-source inverters were earlier proposed. These new classes are generally more robust less sensitive electromagnetic noises. However, their capabilities somehow compromised high component stresses poorer spectral performances caused low...

This paper presents the careful integration of a newly proposed Z-source topological concept to basic neutral-point-clamped (NPC) inverter topology for designing three-level with both voltage-buck and voltage-boost capabilities. The designed NPC uses two unique X-shaped inductance-capacitance (LC) impedance networks that are connected between isolated dc input power sources its circuitry boosting AC output voltage. Through design an appropriate pulsewidth-modulation (PWM) algorithm, can be...

The recycled batteries can be assumed for the cost-effective grid energy storage (ES) applications, where state of health (SOH) are hard to make equal when reassembling them in one ES system. Therefore, implementing traditional state-of-charge balancing control methods, integrated into same system will demonstrate SOH deviation characteristics during long-term operation due different degradation they suffered, which reduce mean time repair, increase maintenance duty, and shorten life...

Nine-switch converter is a recent reduced semiconductor topology proposed in place of the back-to-back 12-switch converter. Like its precedence, nine-switch can either operate at single common frequency (CF) or different frequencies (DFs) two sets three-phase terminals, but because reduced-switch configuration, some compromises cannot be avoided. In particular, more restricted total attainable amplitude and phase shift between terminal sets, which means that when migrating standard...

A nine-switch power converter having two sets of output terminals was recently proposed in place the traditional back-to-back that uses 12 switches total. The has already been proven to have certain advantages, addition its component saving topological feature. Despite these so far found limited applications due many perceived performance tradeoffs like requiring an oversized dc-link capacitor, amplitude sharing, and constrained phase shift between terminals. Instead accepting as...

Phase-locked loop (PLL) technique is widely used for synchronization applications. A variety of moving average filter (MAF)-based PLLs have been presented in recently published literatures. MAF-based PLL can completely eliminate the effect unbalanced voltage, characteristic harmonics, and dc offset. Unfortunately, open-loop bandwidth drastically reduced after incorporating MAF into structure. The problem analyzed detail this paper, it proved to be caused by large window width which...

Extending traditional deterministic economic dispatch to incorporate significant stochastic wind power is an important but challenging task in today's system decision making. In this paper, issue formulated as a chance-constrained (CCED) problem. Usually, the presence of non-Gaussian correlated random variables, both objective function and constraints are difficult handle. To address issue, paper provides novel method dealing with variables. First, Gaussian mixture model adopted represent...

To realize the synergy between plug-in electric vehicles (PEVs) and wind power, this paper presents a hierarchical stochastic control scheme for coordination of PEV charging power in microgrid. This consists two layers. Based on non-Gaussian predictive distributions, an upper layer controller coordinates operation aggregator turbine. The computed references are sent to lower controllers execution. optimally allots aggregated individual PEVs. regulates output In way, balance supply demand...

This paper presents control methods for hybrid AC/DC microgrid under islanding operation condition. The schemes AC sub-microgrid and DC are investigated according to the power sharing requirement operational reliability. In addition, key of interlinking converter with DC-link capacitor or energy storage, which will devote proper between sub-microgrids maintain side voltage stable, is reviewed. Combining specific developed converter, whole can manage flow transferred improving on quality efficiency.

Inverters with high-output voltage gain usually face the problem of high-input current flowing through their components. The might further be exaggerated if inverters use high-frequency magnetic devices like transformers or coupled inductors. Leakage inductances these must strictly small to prevent overvoltages caused by switching winding currents. To avoid related problems, cascaded trans-Z-source are proposed. They multiple cells in an alternately cascading pattern rather than a single...

Smart home is an emerging area that opens up a diverse set of downstream applications, such as dynamic pricing and demand response techniques, whose goals are typically to lower power consumption while providing comfortable convenient services. has been extensively studied, shown be beneficial in people's real lives. Although useful, typical smart platforms work at the "servant" level - highly dependent on user inputs with no predictions human demands which, if well addressed, would...

This paper presents a trilevel risk-averse strategy to configure the grid-scale energy storage systems (ESS) in active distribution network. Unlike traditional planning framework, which presumes that ESS and renewable sources (RES) are cooperatively planned, we consider practical situation siting choice of individual RES owners could be conflict with operation target hosting capacity improvement. To address this challenge, formulation "min-max" risk constraint is developed. Also,...