Ariya Sangwongwanich - IEEE Xplore Author Profile

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This article proposes a new dipolar pulse width modulation (PWM) algorithm for direct power control of each dc source of a dual-input three-level inverter. This capability, which is required for dual maximum power point tracking (MPPT) in photovoltaic (PV) applications and power distribution control of mixed or hybrid dc-sources, cannot be achieved easily with the conventional control methods. In ...Show More
Dual active bridge converter with multilevel neutral point clamped topology has shown potential to be a viable solution for medium-voltage dc systems. However, it will face a crucial challenge with regard to capacitor voltage balancing. In order to mitigate the negative effects caused by the voltage imbalance, e.g., overvoltage on certain devices, various control strategies for voltage balancing h...Show More
A harmonic-based Triple-Phase Shift (TPS) modulation strategy for a 2.1kW, 270V Bidirectional DC-DC Dual Active Bridge (DAB) conditioning system for an All Electric Aircraft application is proposed in this paper. The DAB model has been obtained concerning the frequency domain, particularly resorting to the Fundamental Component Analysis (FCA). The TPS parameters are selected to both erase the flow...Show More
The modular multilevel converter (MMC) is a topology that consists of a high number of capacitors, and degradation of capacitors can lead to converter malfunction, limiting the overall system lifetime. Condition monitoring methods can be applied to assess the health status of capacitors and realize predictive maintenance to improve reliability. Current research works for condition monitoring of ca...Show More
Neutral-point-clamped (NPC)-based dual-active-bridge (DAB) converters face a crucial challenge with regard to capacitor voltage balancing. In order to suppress the negative effects caused by the voltage imbalance, e.g., overvoltage on certain devices, various control strategies for voltage balancing have been developed. To better design and implement the voltage balancing strategies, this paper be...Show More
This paper proposes an IGBT open-circuit fault diagnosis method that can maintain high accuracy under diverse operation conditions and circuit parameter variances. Different aspects of uncertainties are analyzed in the component parameters, operation conditions, and measurement errors of a three-phase inverter case study. A lightweight Convolutional Neural Network (CNN) is applied based on an obta...Show More
Open-circuit fault (OCF) on power switches can cause a severe threat to operation and safety of power electronic converters. In the neutral-point-clamped (NPC)-based dual-active-bridge (DAB) converters, the OCFs will result in an increase in the current stress, dc bias, and capacitor voltage imbalance. In order to address these issues, the faulty switch should be identified so that a fault-toleran...Show More
While data-driven methods start to be applied to fault diagnosis of power converters, there are still some limitations: (1) feature extraction relies on expert experience, (2) the model trained in one system cannot be applied to another different system, and (3) abundant fault data is difficult to obtain in practical applications. To address them, a transferable deep learning network for insulated...Show More
Power electronics and battery energy storage are the key enabling technologies for high-efficiency energy conversions to realize green transition. With an increasing demand for electrification, renewable energy integration, and energy saving, more and more power electronics and batteries are being utilized. Consequently, their impact on the environment becomes of great concern, as they are respons...Show More
Multilevel dual-active-bridge (DAB) dc–dc converters offer higher voltage-blocking capability and larger step-up ratios, as well as increased number of degrees of freedom (DoFs) compared with the traditional two-level DAB converter. Thus, it has potential to be used in medium-voltage dc systems. However, the control complexity of the multi-level DAB converters also increases along with the number ...Show More
This article proposes a self-data-driven method for remaining useful life prediction of PV arrays based on self-condition monitoring data considering the uncertainty and volatility. First, a health indicator reconstruction method is presented to eliminate the uncertainty and volatility of condition monitoring data. Second, a nonlinear Gamma stochastic process model is established to describe the p...Show More
Hybrid converters with multiports (simultaneous dc and ac outputs) are promising solutions to reduce conversion stages from solar energy to various loads, and thereby increasing the utilization of residential PV systems. Considering common-mode noises suppression and high reliability, this article proposes a fully symmetrical hybrid PV converter concept with two dc ports and one ac port. The propo...Show More
In this article, a new two-stage global maximum power point tracking (GMPPT) algorithm based on artificial neural network (ANN) is proposed. The novel ANN architecture is presented first, which requires fewer sampling points than other ANN-based GMPPT approaches, thereby reducing both the tracking time and power loss involved in the tracking. In addition, it does not require costly illuminance or ...Show More
Several kilowatt litz wire inductor has wide application, including automotive, renewable energy, household power supply, etc., which has a promising market for the next ten years. The traditional method of inductor loss calculation is a compromise between simplicity and accuracy. For example, iGSE (improved generalized Steinmetz equation) is commonly seen in core loss calculation, and the Dowell ...Show More
Grid-connected rooftop photovoltaic (PV) systems are a promising solution to reduce electricity bills and support sustainable development in residential areas. Although excess PV power can be sold to the grid at attractive tariffs, premium feed - in tariffs have been discouraged in many countries. Instead, self-consumption policies have been encouraged to promote local generation and consumption. ...Show More
Various methods have been proposed to reduce the charging time of lithium-ion batteries (LIBs). The multi-stage constant current (MSCC) charging technique has gained significant attention as a potential solution among various proposed methods. A study was conducted to investigate the impact of the MSCC charging technique on LIBs. Specifically, this research focused on the MSCC approach that utiliz...Show More
The health status of power semiconductor devices in power converters is important but difficult to monitor. This paper analyzes the relationship between harmonics in inverter control variables and a health precursor (the on-state voltage Von of power semiconductor devices). Based on the analysis, harmonics can estimate Von without adding extra sensing circuits. The method is validated through simu...Show More
The increasing penetration leads to the requirement of reactive power and voltage support provided by the renewable energy, such as PV. As a result, the reliability of the PV systems may be highly influenced. This paper studies the impact of power factors on reliability of NPC inverter-based PV systems, where a 225 kW system with commercial components and actual mission profile is used as the demo...Show More
To reduce the wear-out effect and minimize the Single Event Burnout effect of the power semiconductor, several hardware design rules for inverters in electric aircraft propulsion systems are posed and implemented in this work. These strategies include scalable chip area and derated DC-link voltage. It is observed in a short-range reference aircraft case study that these rules could result in a con...Show More
Power electronics reliability can have a significant impact on the system reliability and cost, especially when a high installation rate of the renewable energy-based units is present in the system. Therefore, the power electronics reliability impact on the optimum system design needs to be included in the generation planning. However, current long-term planning methods do not include this impact ...Show More
The multi-stage constant current (MSCC) charging strategy is intended to enhance the performance of lithium-ion batteries (LIBs). Therefore, this paper investigates the MSCC charging effect on LIB's performance parameters, including charging time, charged/discharged capacity, charging energy efficiency, and maximum/average temperature rise. A 2.6 Ah lithium-iron-phosphate (LFP)-based Li-ion batter...Show More
This paper presents an assessment of the reliability of neutral point clamped (NPC) based photovoltaic (PV) systems using a mission profile. The study focuses on the two types of fragile components in these systems, namely the insulated-gate bipolar transistors (IGBTs) and the DC Al electrolytic capacitors. Additionally, the effects of power degradation due to the aging of PV panel and the over-te...Show More
Battery energy storage systems (BESS) are fre-quently utilized to support the power grid. Second-Life batteries (SLBs) are considered as a potential solution to reduce the cost of BESS in stationary applications. However, using SLBs has certain challenges due to the non-uniform State-of-Charge (SOC) and State-of-Health (SOH) among the battery modules. This study examines two control strategies for...Show More
This article proposes a unified solution for single or multiple sensor faults in the cascaded H-bridge multilevel converters (CHBMCs), including the identification of fault location and fault types, and resilient control. The original states and sensor fault information are decoupled completely and estimated simultaneously by a reduced-order observer. The accuracy and robustness of the observed va...Show More
Grid-connected inverter failure may be caused by outliers of a population of units in field operation, due to the LCL filter parameter uncertainty. This article proposes a probabilistic framework to analyze the impact of multiple filter parameter variances due to component tolerances, operating points, and aging effects. Both robust stability and filter performance are selected as the risk of fail...Show More