The conventional model predictive control (MPC) suffers from high common-mode voltage (CMV) magnitude and large current ripples. In this article, the reduced CMV MPC strategy with double vector (RCMV-MPCDV) is proposed for three-level inverters, which adopts to reduce ripples simultaneously in per-sampling period. First, based on geometric relationship of median, a novel cost function that evaluates median line distance computational complexity, rather than evaluating closest distance....

Recently, a few fault-tolerant control strategies have been proposed for T-type three-level inverters to improve the reliability of inverter system. However, neutral-point (NP) voltage oscillations suppression is never considered in previous strategies. In order suppress NP when open-circuit fault occurs switches, this paper proposes two novel named as improved two-level switching tolerant and hybrid (HS-TC). Both methods are implemented by adding an optimal time-offset three-phase turn-on...

Parallel three-level inverters have attracted considerable attention due to the advantages increase power rating and flexibility of conversion systems. However, this type configuration requires suppress zero-sequence circulating current (ZSCC) through either modulation or active control strategies, avoid overloading problems a single inverter. For operation paralleled T-type inverters, another requirement is reduce common mode voltage (CMV) associated with pulsewidth method. To better solve...

The three-level T-type inverter has outstanding performances and better in the switching device selection than a two-level inverter. However, problem of common-mode voltages neutral-point potential (NP) unbalance is generated. This paper proposes model predictive control method for reducing common mode voltage balancing (NP). Based on relationship between states (CMV), 19 vectors are adopted to reduce CMV. In addition, P-type N-type small selected NP balance. Without utilizing redundancy...

This article presents a fault-tolerant control strategy when an open-circuit fault (OCF) occurs in T-type three-level rectifiers, which the neutral-point (NP) voltage balance and loss reduction are considered simultaneously. When OCF occurs, one fundamental period is classified into two time intervals: normal interval (NTI), abnormal (ATI). In NTI, time-offset utilized to achieve NP within switching period. Aside from this, extra event between periods also reduced by employing appropriate...

It is well known that a zero-sequence circulating current could exist in parallel three-phase converters with common DC bus. However, this conclusion normally drawn out while the magnetic coupling between phases being neglected. In fact, for cost and size, cores of reactors transformers used inverters are three poles. The magnet couple poles makes currents change significantly from single-phase transformers. This paper established instantaneous model three-pole analyses based on indicate...

This paper proposes a carrier-based fault-tolerant control strategy for T-type three-level rectifier with neutral-point (NP) voltage oscillations suppression when an open-circuit fault occurs. The proposed is demonstrated by dividing into two conditions: the faulty condition of outer switches and inner switches. In case fault, requirement to maintain normal operation sinusoidal currents demonstrated. Meanwhile, in order suppress NP oscillations, hybrid strategy, which implemented adding...

In this paper, according to the operational principle of SVPWM, a novel over-modulation technique is proposed. By means graphical analysis and Fourier decomposition, accurate relationship between modulation index(MI) auxiliary parameter mref derived respectively under two area. With unified parameter, output voltage three phases could increase continuously up that six-step operation. addition, total harmonic distortion (THD) using proposed analyzed. An experiment setup presented at end which...

Three-level inverter has been widely used in electric drives and renewable power generation system. However, the common mode voltage (CMV) output current ripple reduction of a three-level should be carefully regulated for appropriate operation. As these two targets are mutually interrelated, conventional space vector modulation (SVM) scheme cannot cope with them decently. To overcome this drawback, article proposes novel modified SVM to realize CMV simultaneously. The generating mechanism is...

Amorphous Ni–3.81 wt.%W–12.40 wt.%P deposit showed two crystallization exothermic peaks while amorphous Ni–12.35 presented one. Formation of the and related influencing factors were investigated through TEM, DSC XRD. The solid solution pinning effect W affected binding P Ni, which induced peaks. variety quantity unstable intermediate phases NixPy played a significant role on modifying After annealed deposits, formation order clusters was analyzed atomic pair density function. Ni(W) could...

In the aircraft power systems with 360–800 Hz line frequency or medium‐ and high‐power three‐phase pulse‐width modulation (PWM) rectifier applications operating at utility (50/60 Hz), ratio of switching to will be reduced because increased low frequency. Therefore assumptions that average voltage drop across input inductor PWM rectifiers can neglected if conventional one‐cycle controlled (OCC) method had been adopted no longer true anymore, which deteriorate system factor (PF) dramatically....

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In this paper, a real-time open-circuit fault diagnosis method for T-type three-level rectifiers is proposed. Not only the detection but also faulty switch identification can be realized in proposed algorithm. The presented based on instant voltage error of line-to-line voltages and dc-link which are already available control system. And hence, no more additional hardware needed. Besides has advantages fast response, identified within two fundamental periods. Simulation experimental results...

We present an optical/inertial data fusion system for motion tracking of the robot manipulator, which is proved to be more robust and accurate than a normal optical (OTS). By with inertial measurement unit (IMU), both robustness accuracy OTS are improved. The Kalman filter used in fusion. error distribution provides important reference on estimation noise using filter. With proper setup effective method coordinate frame synchronization, results experiments show significant improvement terms...

Nowadays, research on the reliability improvement of T-type three-level inverters is studied as an important issue. In this paper, a novel fault tolerant control strategy based model predictive (MPC) proposed for open-circuit faults in switch devices. When occurs to neutral-point switches, impossible switching states zero- and small-voltage vectors should be replaced by redundancy states. addition, avoid use medium-voltage vectors, weight coefficient set infinity. case half-bridge...

In this paper, the principle of three-phase VIENNA rectifier is firstly analyzed. The two-level space vector based modulation strategy adopted to simplify time-consuming trigonometric functions in a DSP and improve control performance. Then, expression boost inductor calculated accurately alleviate zero-crossing distortion, neutral point potential balance used ensure dynamic capacitance voltage upper lower buses, which are both helpful quality waveforms under steady-state. Subsequently,...

An advanced silicon-on-insulator (SOI) pixel sensor with an anti-punch-through structure is proposed to suppress the effect of total ionizing dose (TID) and crosstalk between electronics sensor. A buried p-well (BPW) a n-well (BNW) are both connected their respective voltages shield SOI circuits from BNW used as electrode controllable potential, which provides similar functionality middle silicon in double (DSOI). The biased BPW implant adopted form potential barrier holes BPW. lateral...

In this paper, an effective scheme of predictive control torque and flux is proposed to decrease the ripple reduce locus distortion in whole speed region. order obtain good flux, solve pure integration problem stator estimator based on voltage model, a practical improvement proposed. The simulation experiment results show that dynamic steady performances have been improved much more than conventional DTC. Finally, all schemes are realized integrated DSP (TMS320C32) hardware system.

It is hard for a VENNIA rectifier to operate at non-load condition, where the converter usually triggers over voltage protection. To solve this problem, variable feedback control proposed limit duty ratio of switches condition. The method leads greatly reduced output ripple can be tightly controlled. Both operating principle and parameter design guidelines are analyzed in detail. Finally, experimental results presented verify control.

This article aims to explore and exploit the comprehensive optimization of environmental economic in power generation process by applying relevant knowledge game theory background scheduling problem microgrid system. Furthermore, order solve contradiction between goals dispatching, non-cooperative models distributed generators based on Carbon trading are proposed using weight coefficient method. The Nash equilibrium solution each output is obtained when model solved particle swarm algorithm...