Reconfigurable Control of PWM AC-DC-DC Converter without Redundancy Leg Supplying an AC Motor Drive

Sahraoui, K.; Gaoui, Bachir

doi:10.3311/ppee.15028

Cited by 4 publications

(3 citation statements)

References 20 publications

(40 reference statements)

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“…This leg will replace the faulty one of the other legs under any power switch failure in the PWM-inverter. When a fault occurs in one of the power switches (T 1 − T 6 ), the fault detection scheme detects the fault occurrence and isolates the faulty leg [21]. If this fault is an open circuit, the isolation is implemented by removing the gate signal from the switches of the faulty leg.…”

Section: Fault-tolerant Pwm-inverter Topologymentioning

confidence: 99%

Voltage Error Estimation-Based Fault Diagnosis Method for Three- phase PWM-inverter in Grid-connected Photovoltaic Power System Without any Over-rating

Ouai,

Mokrani,

Machmoum

et al. 2024

Period. Polytech. Elec. Eng. Comp. Sci.

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Inverter is an essential component of a grid connected PV system. In fact, an open-switch fault in this power converter could result an important system malfunction and consequently leads to system disconnection. In this context, this paper focuses on the fault-tolerant control of PWM-inverter with redundancy leg for grid-connected PV system. In addition, a fast method of fault detection and compensation is used to maintain the continuous operation of the converter when there is a half-leg open-circuit fault (IGBT+ anti-parallel diode) on one of PWM-inverter legs. Therefore, it can detect this type of fault and compensate it in less than 50 μs by using a time criterion instead of voltage criterion. Also, the fuzzy logic technique is employed to control the active and reactive power injected into the network without exceeding the whole system power capacity limits. Note that, in this study, the active and reactive power references of the chosen operating point (the reactive-to-active power ratio: tgφ = Q/P = 0.19) are based on experimental tests. Simulation results show the feasibility and the effectiveness of the proposed fault diagnosis method in terms of fault detection and service continuity in presence of a half-leg open-circuit fault in PWM-inverter without any over-rating of the PV system components or instability.

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Section: Fault-tolerant Pwm-inverter Topologymentioning

confidence: 99%

Voltage Error Estimation-Based Fault Diagnosis Method for Three- phase PWM-inverter in Grid-connected Photovoltaic Power System Without any Over-rating

Ouai,

Mokrani,

Machmoum

et al. 2024

Period. Polytech. Elec. Eng. Comp. Sci.

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“…Here, the control of PWM mode can be provided by the PWM output circuit of 2407a. In 2407a [4], there are two event manager (EV) modules, which can generate 8 PWM outputs, including 6 ways generated by the comparison unit and 2 ways generated by two general programmable timers, which can fully meet the control requirements of steering gear and oil span. The control signal of motor actuator is realized by DA converter.…”

Section: Rudder and Throttle Drivementioning

confidence: 99%

Design of UAV Flight Control System

2022

IJFET

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In order to improve the control performance of UAV. For a small UAV, the hardware design scheme of UAV flight control computer with STM32 as the processing core is proposed and implemented. The overall scheme design, specific hardware selection and interface design of the system are given in detail. STM32, as the main controller, expands the parallel A/D, D/A, asynchronous serial communication interface and memory around, enriches the system hardware interface resources, and selects the peripheral expansion circuit with complex programmable logic controller (CPID) to realize interrupt control. This flight control computer has the characteristics of small volume and strong autonomous navigation ability.

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“…In such systems, the DC link is usually implemented using a single capacitor in the case of two-level conversion or multiple split capacitors in the case of multi-level conversion [10,11]. This arrangement provides power decoupling between phases, and allows for independent control of AC/DC and DC/AC converters using different methods of pulse width modulation (PWM) [12][13][14][15][16][17][18]. The size, weight and cost of the DC-link capacitor depend on the DC link voltage reference value and power conversion system rating [19].…”

Section: Introductionmentioning

confidence: 99%

Generalization of Split DC Link Voltages Behavior in Three-Phase-Level Converters Operating with Arbitrary Power Factor with Restricted Zero-Sequence Component

Siton,

Kuperman

2023

Electronics

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This article examines the impact of a power factor on the behavior of partial DC link voltages in three-phase three-level AC/DC (or DC/AC) converters operating without additional balancing hardware. We consider the case in which the controller utilizes a bandwidth-restricted (DC in steady state) zero-sequence component to achieve average partial DC link voltage equalization since the injection of high-order zero-sequence components is impossible or forbidden. An assessment of partial split DC-link capacitor voltage behavior (particularly that of ripple magnitudes and phases) is necessary for, e.g., minimizing the values of DC link capacitances and selecting reference voltage values. Previous studies assessed the abovementioned behavior analytically for operation under a unity power factor based on third-harmonic-dominated split partial voltages’ ripple nature. However, it is shown here that deviation from the unity power factor introduces additional (to the third harmonic) non-negligible harmonic content, increasing partial voltage ripple magnitudes and shifting their phase (relative to the mains voltages). As a result, the third-harmonic-only assumption is no longer valid, and it is then nearly impossible to derive corresponding analytical expressions. Consequently, a numerical approach is used in this work to derive a generalized expression of normalized ripple energy as a function of the power factor, which can then easily be utilized for assessments of split DC link voltage behaviors for certain DC link capacitances and reference voltages. Simulations and experimental results validate the proposed methodology applied to a 10 kVA T-type converter prototype.

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Reconfigurable Control of PWM AC-DC-DC Converter without Redundancy Leg Supplying an AC Motor Drive

Cited by 4 publications

References 20 publications

Voltage Error Estimation-Based Fault Diagnosis Method for Three- phase PWM-inverter in Grid-connected Photovoltaic Power System Without any Over-rating

Voltage Error Estimation-Based Fault Diagnosis Method for Three- phase PWM-inverter in Grid-connected Photovoltaic Power System Without any Over-rating

Design of UAV Flight Control System

Generalization of Split DC Link Voltages Behavior in Three-Phase-Level Converters Operating with Arbitrary Power Factor with Restricted Zero-Sequence Component

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