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A GaN-on-Si power device is a strong candidate to replace power components based on silicon in high-end market for low-voltage applications, thanks to its electrical characteristics. To maximize opportunities of the GaN device in field applications, a package technology plays an important role in a discrete GaN power device. A few specialized package technologies having very lower stray inductance...
Owing to the high current density but smaller die area of SiC components, high current SiC power modules typically feature a large number of parallel connected dies. Due to the faster electrical dynamics of these power modules, and the inherent mismatch of properties between the dies, certain dies can be poorly utilized — requiring either more dies to achieve a given current rating or a de-rating...
This paper presents a novel hierarchical control solution and real-time controller for distributed power plants aimed for achieving full control capabilities and increased benefits from direct market participation, grid interaction and plant automation. The hierarchical control structure is introduced in detail, as well as the main functionalities inherent to each control layer. In addition, this...
The emerging 650 V large current rating, Enhancement-mode (E-mode) Gallium Nitride High-Electron-Mobility Transistor (GaN HEMT) is a promising device for low to medium power, high power density converters (e.g., motor drives, battery chargers), which require high robustness levels. Thus, a comprehensive study of the short circuit behavior of high power E-mode GaN HEMT is the subject of this paper...
DC distribution is emerging as a solution for data centers, however the optimal system architectures have not been established in the industry. This paper first reviews the most recent studies, products and activities of DC distribution in data centers. A hybrid AC and DC distribution architecture is introduced by using both 415V AC and 380V DC together to achieve the data center reliability requirements...
Coming with the reliability enhancement and the life extension for the Photovoltaic (PV) inverters modules, diagnostic techniques will be required to derive signature identification. The reliable operation of PV inverter is very crucial to get the highest performance for the long term. A new Smart Inverter Robustness Index (SIRI) is used for verifying the performance and robustness of the grid-tied...
A reliable modular dc-dc converter that is well-suited to the MVDC grid applications is proposed in this paper. This converter benefits from zero current turn-off and soft turn-on switching; hence, it can use naturally commutated switches such as silicon-controlled rectifiers (SCR). SCRs offer numerous advantages over other types of switches, among them are simple control, long lifetime, low losses,...
Some enterprises would place their core business system in the enterprise network and cut off the connection with the external network, in order to prevent network attacks from outside. Enterprises often need to move business data from the external network to the enterprise network. There will be needs of across-network transmission. In this paper, a one-way transmission technology in network isolation...
This paper proposes an efficient ramp rate control scheme for capacity firming of an integrated Photovoltaic (PV) power system with battery energy storage. This scheme addresses one of the main limitations of PV systems, namely intermittency, making available energy to be non-dispatchable to the grid and cannot be forecasted on a day ahead basis. The paper also proposes a novel state of charge controller...
Privacy considerations of individuals becomes more and more popular issue in recommender systems due to the increasing need for protecting confidential data. Even though users of recommender systems enjoy with personalized productions, they behave timidly about sharing their private data due to the some privacy concerns about price discrimination, unsolicited marketing, govern-ment surveillance and...
This paper introduces a 97% efficiency medium voltage (MV) Solid State Transformer (SST) based on two-level single stage (TLSS) topology and 15 kV SiC MOSFETs. Series resonant converter (SRC) is implemented as the main stage and is identified as a current source (CS) SRC for the first time. Equivalent resonant frequency of the proposed CS-SRC is analyzed in both time domain and frequency domain. Resonant...
This paper presents a reliability analysis and life testing of semiconductor devices for in-wheel motor (IWM) drive system in automotive applications. Considering practical factors such as vehicle lifetime requirements, a novel drive cycle is proposed to examine and assess the semiconductor reliability of a two IWM-driven vehicle. Based on the evaluated thermal profile of the device junction, the...
With the increasing penetration of wind power, reliable and cost-effective wind energy production are of more and more importance. As one of the promising configurations, the doubly-fed induction generator based partial-scale wind power converter is still dominating in the existing wind farms, and its reliability assessment is studied considering the annual wind profile. According to an electro-thermal...
This paper presents a rapidly and lower neural networks to treat those waste water index that is difficult to be measured. Model called soft sensor is composited two parts: one is used to estimate the principal linear output, the other one is used to adjust estimated error to obtain better accuracy. Selection of features that effects greatly computation scale and predict accuracy is discussed also...
This paper presents a kind of architecture design of bus based CNC system of domestic-processor based on Loongson and analyzes both the design of module structure of domestic-processor based on Loongson and the function and implementation method of MII bus based CNC main control board. These studies can solve the problem of chip of domestic NC system chip and have great significance to improve the...
Along with our country the implementation of the strategy of developing the new energy, solar energy is a kind of ideal clean energy future energy, with the power grid operation requirements of photovoltaic power generation system is increasing day by day, for the needs of the operation and control, is necessary for photovoltaic system monitoring, photovoltaic power plant key components of condition...
Safety Instrumented Systems (SIS) act as important safety barriers in industrial systems for preventing hazardous accidents. It is therefore significant to study the reliability issues of SIS. As a matter of fact, SIS have common behaviors such as periodic test policies to discover dangerous undetected failures. Modeling patterns capitalize the experience from modeling SIS. By reusing modeling patterns,...
The standard and real-time communication technology is an unalloyed inevitability for the development of Internet of Things (IoT) applications. However, the selection of a standard and effective messaging protocol is a challenging and daunting task for any organisation because it depends on the nature of the IoT system and its messaging requirements. Copious messaging protocols have been developed...
Transmission techniques based on channel coding with feedback are proposed in this paper to enhance the security of wireless communications systems at the physical layer. Reliable and secure transmission over an additive noise Gaussian wiretap channel is investigated using Bose-Chaudhuri-Hocquenghem (BCH) and Low-Density Parity-Check (LDPC) channel codes. A hybrid automatic repeat-request (HARQ) protocol...
Power transformer has an important role to transfer energy from power plant to consumer. There are 325 banks of power transformer had been installed in PLN TJBB which various ages and manufacturers. In order to manage the assets, PLN TJBB implemented asset management system based on ISO 55001. One of asset management objective is to fulfill transmission service quality level. However, transformer...
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