The requirement of high quality electric power supply from utility is a common practice today. Thus, no matter in planning, designing, or system dispatching, it is desired to give un-interrupted electric power to cust...
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ISBN:
(纸本)9789604742820
The requirement of high quality electric power supply from utility is a common practice today. Thus, no matter in planning, designing, or system dispatching, it is desired to give un-interrupted electric power to customers. However, when the loading of a distribution system power feeder is too high or the feeder needs to be maintained, the feeder load should be transferred to other feeder. There are two types of feeder load transferring, interrupted and un-interrupted. The un-interrupted type means that the electric power supplied to customers will not be interrupted during feeder load transferring. However, there are several factors to affect the feeder current magnitude during load transferring, such as transformer impedances, primary side power level, and original loading of the feeder. If the current is too high, the feeder protection system will trip the feeder breakers to shut down the power supply system. A novel approach is presented to reduce the feeder current magnitude during load transferring. The phasor measurement units (PMU) will be used to obtain the synchronous voltage magnitude and phase angle of the transformers, of which feeders are transferred. A power conditioner is installed in the secondary side of the transformer. Then the phase angle values from the PMUs will be sent to the power conditioner and the suitable phase shifting will be used to reduce the phase angle difference between the two transformers. The simulation results show the feeder current magnitude will be greatly reduced during load transferring. The power supply reliability is raised.
Operating multiple mobile robots while having finite amount of energy is one of limitation on doing a task in long term. In this work, a decentralized controller system based on inspired of swarm honeybees in foraging...
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Modern information visualization in focussed on new methods for visual mappings and novel strategies for interaction and navigation through various types of view of a visual form. The paper presents the Bloom platform...
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In this paper, we develop a micro-gripper that actuated by piezoelectric cantilever for the need of micro parts assembly. The displacement-voltage relationship model is given. For hysteresis of piezoelectric ceramic, ...
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The TALISMAN+ project, financed by the Spanish Ministry of Science and Innovation, aims to research and demonstrate innovative solutions transferable to society which offer services and products based on information a...
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We consider that a set of distributed agents desire to reach consensus on the average of their initial state values, while communicating with neighboring agents through a shared medium. This communication medium allow...
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ISBN:
(纸本)9781612848006
We consider that a set of distributed agents desire to reach consensus on the average of their initial state values, while communicating with neighboring agents through a shared medium. This communication medium allows only one agent to transmit unidirectionally at a given time, which is true, e.g., in wireless networks. We address scenarios where the choice of agents that transmit and receive messages at each transmission time follows a stochastic characterization, and we model the topology of allowable transmissions with asymmetric graphs. In particular, we consider: (i) randomized gossip algorithms in wireless networks, where each agent becomes active at randomly chosen times, transmitting its data to a single neighbor;(ii) broadcast wireless networks, where each agent transmits to all the other agents, and access to the network occurs with the same probability for every node. We propose a solution in terms of a linear distributed algorithm based on a state augmentation technique, and prove that this solution achieves average consensus in a stochastic sense, for the special cases (i) and (ii). Expressions for absolute time convergence rates at which average consensus is achieved are also given.
In almost any underwater operation that takes place on or under the seafloor, it is necessary to have an understanding of the makeup of the seabed below the silt and sediment. Sonar is an acoustic system extensively u...
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In this paper, a uniform calculus-based approach for synthesizing monitors checking correctness properties specified by a large variety of logics at runtime is provided, including future and past time logics, interval...
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The complexity of current mixed software/hardware custom digital systems, has led to the requirement for automated high-level synthesis of the system from abstract, executable specifications, in order to drastically r...
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We analyze of the effects of carrier frequency offset (CFO) and timing offset in multiuser offset QAM (OQAM) filter bank multicarrier (FBMC) systems. These effects are quantified by signal-to-interference ratio (SIR) ...
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