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new device for hot-line sweeping of post insulators in substations is introduced. The installation is composed of a sweeping actuator, an insulated transmission mechanism, a steering mechanism, a hydraulic driving device, anti dropping device, hydraulic mechanical arm, telescopic arm and a moving chassis insulation‥ And can complete the sweeping work of insulator under the condition of hot-line.
In this paper, a novel wideband up-converter module applied in millimeter wave is proposed. The local signal (LO) of 13∼17GHz is feed into an active multiplier through a SMA connector, and the output signal of 26∼34GHz is then mixed with an intermediate frequency signal (IF) of 6GHz±0.5GHz through another SMA connector. Thus, the RF signal of 32∼40GHz is considered as the final output signal with...
This paper proposes a Reconfigurable and Fault-tolerant Routing Algorithm (RFRA), which is designed based on the Fault-Tolerant Odd-Even turn model (FTOE). RFRA can tolerate all single link failures without exploiting virtual channels by resetting the route rule. Applying FTOE rules, RFRA not only balances the load around the faulty link but also shortens the fault-tolerant paths. Simulation results...
In order to evaluate operational state of distribution network and facilitate the economic dispatch considering distributed generators, operational evaluation system of distribution network considering distributed generators is proposed. Furthermore, complex evaluation indicators of safety, power quality and economy are defined to evaluate distribution network with distributed generators as well....
With the continuous development of wind power technology, selecting the right location for wind farm is more complicated in China. Micro-siting in WT (wind turbine) aims at determining the layout of the location, a reasonable arrangement of the locations is a prerequisite to ensure the operation of wind powers. In this paper, the CFD (computational fluid dynamics) software is used, with the finite...
High voltage transmission line fault location algorithm without synchronization, which does not require sampling synchronization, reduces cost and has a higher practical engineering value. But the algorithm still needs to be improved in the false root identification of ranging equation, this paper makes a further research on this issue. Firstly, the false root problem of fault location algorithm without...
Aiming at the flexibility, mobility, scalability and other problems in current existing network architectures, this paper proposes a Reconfigurable Service-Centric Network(Re-SCNet) architecture to meet the needs of mass diverse customer service of the future network. Network function combination is one of the main directions to enhance the adaptability of the Internet. Re-SCNet mainly concentrates...
Diverse services need different resources. It is an important issue to achieve the resources occupied by services evenly distribution in network, i.e., avoiding this situation that some devices are fully or even over loaded, while others are free. To solve this problem, in cloud computing environment, the redundant paths in network and data flow partition technology are exploited. The virtual resource...
With the development of layered water injection technology in oil areas, to increase the production/injection efficiency, ground system needs to achieve the accurate control of multiple electric control values which installed in different stratum. Orthogonal frequency division multiplexing (OFDM) is suitable for the environment with poor channel characteristics due to its excellent performance of...
In order to research the power losses in the process of the wireless power transmission in cavity, this article did the analysis from three aspects. The three aspects are the return loss, the power loss caused by the nonideal material of the cavity wall and the heat loss caused by resistance of the antennas. This article made the simulation model of wireless power transmission in cavity based on HFSS...
Object tracking is one of the important tasks for mobile robot, and developing a robust and real-time visual tracking algorithm which can adaptively capture the varying appearance of target under challenging conditions for mobile robot is still an open problem. The main challenges of visual tracking for mobile robot come from variation of target's appearance and disturbance of environment. To cope...
In this paper, a novel distributed functional electrical stimulation (FES) and assessment system for hand movement using wearable technology is proposed. It consists of an FES of wireless EMG-bridge (EMGB) type, a sensor glove and a smartphone-based application software for displaying the virtual 3D hand environment. Combined with the FES therapy and the sensor glove, the proposed system provides...
In this letter, we propose the simulation, design and fabrication of the microstip quad-band bandstop filter (QBBSF) with Square Spiral Resonators (SSR). The basic cell of the structure consists of a folded stepped impedance microstrip transmission line. The center frequency of the filter is 1.12 GHz, 3.61 GHz, 6.20 GHz and 9.81GHz with the bandwidth of 1.13 GHz, 1.25 GHz, 1.12 GHz and 3.01GHz, respectively...
Microgrid is widely implemented for system with high penetration of renewable energy sources. Multiple microgrids can be interlinked to form a Power Park which can be used for wider area applications. Centralized power park control, in which one of the microgrid operate as the voltage/frequency regulator while the power exchange of the rest microgrids with power park network, is determined by the...
Conditional neuromodulation is a form of closed-loop bladder control where neurostimulation is applied in reaction to bladder pressure changes. Current methods based on external catheters have limited utility for chronic ambulatory therapy. We have developed a wireless pressure monitor to provide real-time, catheter-free detection of bladder contractions. The device is sized for chronic implantation...
This paper presents a review of secondary control strategies for DC microgrids (DC MGs) and compares centralized, decentralized and distributed control approaches. The conventional droop control provides proper power sharing among converters with the increment in droop gain. However, this droop gain is inversely proportional to the output current consequently leading to current sharing inaccuracy...
This paper presents a six-pulse low frequency (LF) fluctuating high voltage dc bus based power system architecture for the fuel cell vehicles (FCVs) application. A novel hybrid modulation techniques consisting of six-pulse modulation (SPM) at LF scale and secondary modulation and 33% sine pulse width modulation (33% SPWM) at high frequency (HF) scale. Three-phase ac waveforms are produced for the...
Economic operation is a major concern for microgrids. Conventionally, economic dispatch of distributed generations (DGs) are solved by centralized control with optimization algorithms or distributed control with consensus algorithm. To improve the reliability, scalability and economy of microgrids, a fully decentralized economic power sharing strategy is proposed in this paper. The proposed method...
The increasing pressures faced by manufacturers, the shortening of innovation cycles and the growing importance of high-efficiency manufacturing demand a higher versatility of factory automation. In order to achieve this target, engineering tasks currently performed manually need to be automated. In this case, ontologies emerge as a significant method for representing manufacturing knowledge in a...
The influence of voltage duty cycle on partial discharge (PD) characteristics and endurance of inverter-fed motor insulation were investigated through tests performed on single-contact crossed enameled wires under bipolar repetitive square wave voltages with different duty cycles. The PD patterns, amplitude, repetition rate and lifetime obtained show that short duty cycles, i.e., lower than 50 µs,...
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