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The U-V or V-V winding connections of two single-phase distribution transformers are widely utilized in distribution systems to deliver power to various three-phase and/or single-phase loads. Such special winding connections of distribution transformers can cause three-phase voltage unbalance in distributions systems, which could also lead to unexpected trip of ground relay, extra power losses on...
This paper investigates the design of a compact monopole LTE three-dimension (3D) antenna. LTE operational bandwidth is indispensable while a 3D antenna is used to make 4G mobile phone applicable. The gaps between handset housing and circuit board will be used to design an antenna suitable in the confined space. To simplify the design, a common plane waveguide needs to be fed by the antenna. The advantage...
Network Function Virtualization (NFV) is a promising approach for service providers to reduce CAPEX and OPEX and has drawn a lot of attention from vendors. Service Function Chaining (SFC) provides the ability to define a sequence of network services. This paper identifies two important issues (placement and scaling) on deploying reliably and efficiently SFC with a cloud platform. Based on the OpenStack...
A new multi-layer mushroom structure to suppress common-mode noise rejection in the differential transmission line is proposed in this paper. It consists of a pair of differential transmission lines above the proposed multi-layer mushroom-like structures. In other to produce a particular suppression band to couple with the higher order mode, the two mushroom-like structures interacted with each other...
This paper presents the voltage-variation results at the point of common coupling (PCC) when a high-capacity doubly-fed induction generator (DFIG)-based offshore wind farm (OWF) of 403.2 MW or 288 MW is connected to different buses of the neighboring onshore substation of Taiwan Power System through three or two submarine cables and underground cables. The voltage variations at the PCC under different...
This paper summarizes two novel concepts of antenna design for the applications of wireless power transmission at short distance. The design considers the near-field radiation characteristics of antenna to enhance the energy transfer efficiency. In particular, the first one considers the energy reaction when the transmitting (TX) and receiving (RX) antennas are very close to each other, where the...
The transient-response simulation results of Taiwan Power System whose power grid is connected with a high-capacity offshore wind farm (OWF) of 100 MW subject to symmetrical and unsymmetrical severe disturbances using a commercial power-system simulation software are presented in this paper. A three-phase short-circuit fault is suddenly applied to the collector bus and power grid of the studied power...
The electrical characteristics of a power system connected with a high-capacity offshore wind farm (OWF) can be significantly varied under various wind-speed conditions. This paper demonstrates voltage variations at the point of common coupling (PCC) when a high-capacity OWF is connected to different buses of the neighboring onshore substation of Taiwan Power System (TPS) through three or two submarine...
In this paper, we propose a transmission line model and detailed design process for designing the common-mode suppression filter on multi differential signal pairs. Based on proposed model, we can easily define the geometric parameters of the common-mode filter, and predict its common-mode suppression bandwidth and resonant frequency. The proposed model is verified on a common-mode suppression filter...
As physical obstacles, vehicles have a significant impact on the efficient propagation of safety-related information in vehicular ad hoc networks (VANETs) by frequently obstructing the LOS link between the source and receivers. Obstructing effect of vehicles will diminish the effective coverage of broadcast as part of vehicles can not decode the broadcast successfully and incur severe impact on road...
In Virtual Antenna Array (VAA) based wireless system, knowledge of users' locations can help the transmitter to achieve interference avoidance by steering the main beam towards the intended recipient. In this work, the idea has been applied to licensed shared access (LSA) based cognitive radio (CR) environment where location aware beam-forming has been implemented on spatially modulated Generalized...
In this paper, we propose a deep convolutional neural network model for in-bed behavior recognition and bed-exit prediction. This model extracts features for training from depth images taken by depth cameras in two categories: in-bed images taken several time intervals before a patient gets out of bed, and usual in-bed activity images. The depth camera-based model features grayscale and low-resolution...
This paper studies and analyzes the special power-quality measurement results of a commercial onshore wind farm connected to the power grid of Taiwan Power System when Typhoon Matmo passed through Taiwan. This Kuan-Yuan onshore wind farm of 28.5 MW with nineteen 1.5-MW wind-turbine generator (WTGs) based on doubly-fed induction generator (DFIG) is connected to Kuan-Yin primary substation through two...
This paper investigates and analyzes the measured power-quality results of an onshore wind farm with three wind-turbine generators connected to the power grid of Taiwan Power System. The three 2-MW wind permanent-magnet synchronous generators of the studied Taichung Power Plant's onshore wind farm are connected to the extra-high-voltage bus of 161 kV through a step-up three-winding distribution transformer...
This paper presents a compact design of shorted patch rectenna with the harmonic rejection properties for the applications of wireless power transmission. In order to improve the power conversion efficiency (PCE), the harmonic rejection filter (HRF) is replaced by etching a U-shape slot resonator on the shorted patch antenna. As a result, this method may improve the PCE without sacrificing the capability...
This paper presents Intelligent Plant Care Hydroponic Box (IPCH-Box) that exercises environment driven control methods through an Internet-of-Things (IoT) management tool called IoTtalk. IoTtalk provides a scalable and configurable software for users to easily and quickly add/remove/exchange the sensors and actuators, and program their interactions. From the experimental measurement results of IPCH-Box,...
National Chiao Tung University is executing a large smart campus project sponsored by Ministry of Science and Technology. One of the goals is to utilize Internet of Things (IoT) technology to control electronic appliance and education devices. This talk describes a platform called IoTtalk for IOT device interaction. IoTtalk allows connection and meaningful interaction between physical IoT devices...
In this paper, radiation from a PCB trace with broadband harmonic frequency signals is proposed. For the digital signal, there are high harmonic frequency component current. These current will cause the radiated emissions which is called electromagnetic interference. Some of the radiated emissions emit or couple from the PCB traces. It means that the PCB traces act as the antenna. We design some experiments...
The small cell technology is proposed to provide wireless transmission services in the indoor environment and offload the traffic from a macro cell. Because of the small coverage of a small cell, there are usually a large number of small cells deployed in the mobile network, and it is likely that there are no User Equipments (UEs) in a small cell. A small cell may be idle most of the time and waste...
In this paper, we propose a wideband common-mode suppression filter for high-speed differential signals. The proposed design is realized by using only two enhanced coupled C-shaped defected ground structures (DGSs) with a long bridge to achieve the wideband common-mode noise suppression. The equivalent circuit model of two coupled LC resonators is also established with good agreement to the full-wave...
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