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One of the greatest challenges faced by Zhoushan Project is that AC-isolated island can easily be formed due to the weakness of the AC grid connected to the VSC system and vulnerability to typhoon attack. A strategy based on frequency variation is introduced, which does not rely on breakers' status of AC grid. As a multi-terminal project, the AC-DC topology is complex, which brings new challenge to...
This paper introduces the refurbishment of ORMOC-NAGA High Voltage Direct Current (ORMOC-NAGA HVDC)transmission project in Philippines, and presents the improvements of control & protection system for ORMOC-NAGA HVDC project. The problem of the frequency stability in Visayas grid is analyzed. Considering the characteristics of the HVDC link bidirectional operation and the unreliable telecommunication,...
Based on the B/S three layers architecture, I'll design network teaching system to support the flipped classroom model and then expatriate the teaching process in flipped classroom based on this system model, which provides a strong information technology support for the flipped classroom teaching, and is helpful to reduce the difficulty of implementing flip classroom, to improve learning efficiency...
Rail train safety monitoring sensor network is an important screen of guaranteeing the train safe, efficient, and reliable operation, the access point and fusion point are data transmission confluence center of the train safety monitoring sensor network, so reasonable configuration to the access point and fusion point has great significance to ensure the train safety operation. In this paper, basis...
In order to advance the performance of the ESD circuit for the power rail protection, a kind of design scheme named GDNMOS (Gate Driven NMOS) is studied in this paper. NMOS, inverter and RC couple cell are the makeup in this scheme. Device simulation in a pre_Si phase will be an economical way. NMOS parameters are optimized in a device simulation way firstly. By discharge time study the RC-time is...
In this paper a kind of ESD protection design scheme named GDNMOS (gate driven NMOS) is investigated. GDNMOS is used more and more wildly for its excellent performance in submicron CMOS VLSI ESD protection. NMOS, inverter and the RC couple cell are the makeup in this scheme. ESD device simulation in order to evaluate the robustness of the ESD protection device is performed firstly. Device simulation...
A novel method, which enables rapid determination of lifetime for semiconductor devices, is presented based on progressive-stress accelerated degradation test. Through two steps of acceleration: firstly, using process-stress accelerated test to accelerate the parameter degradation; secondly, using the data of 1~5% degradation to extrapolate the data of 10~50% degradation, this method shortens the...
In-situ observation of stress in Al interconnects under electromigration and thermal effect by using the synchrotron radiation x-ray diffraction. The test temperature was controlled by changing the current density of W (self-heating structure). The EM-induced stress was also investigated with current densities from 3times105A/cm2 to 4times106A/cm2. The conclusion agreed well with the simulation results.
Ever-increasing DC/DC power density and peak temperature challenge its reliability and performance. Thermal simulation and analysis play a significant role in development of new generation of DC/DC package design. This paper presents an accurate and fast approach to simulate the thermal distribution of a DC/DC module. The thermal distribution is simulated with ANSYS, and verified by infrared thermal...
A cell-to-cell fusion technique using 3-D microelectrodes array microchip has been developed. It permits cell-to-cell fusion operation in large amount simultaneously. And it needs much lower voltage (alternating voltage and pulse voltage) than the conventional cell fusion techniques. An array of 16 (4times4) microelectrodes can be fabricated on a 1times1cm silicon wafer. And an experimental system,...
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