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Seminário Anual de Automação, Eletrónica Industrial e Instrumentação : livro de...

Assessment of a battery charger for electric vehicles with reactive power control

Batteries of Electric Vehicles (EVs) and Plug-in Hybrid Electric Vehicles (PHEVs) have a large potential not only to provide energy for the locomotion of these vehicles, but also to interact, in dynamic way, with the power grid. Thereby, through the energy stored in the batteries, these vehicles can be used to regulate the active and the reactive power, as local Energy Storage Systems. This way, EVs can contrib...

Comparison of current-source and voltage-source shunt active power filters for ...

This paper presents the comparison between two three-phase Shunt Active Power Filters (SAPFs), one with Current-Source Inverter (CSI) and the other with Voltage-Source Inverter (VSI), which are used to compensate current harmonics and to control reactive power. The control algorithm of both SAPFs is based on the Instantaneous Reactive Power Theory (p-q Theory). The comparison here presented fo...

Implementação do Lean Manufacturing na industria metalomecânica

Tese de mestrado integrado. Engenharia Mecânica. Faculdade de Engenharia. Universidade do Porto. 2010

Three phase four wire shunt active power filter from theory to industrial facil...

Non-linear loads are very common in present industrial facilities, office buildings and even in our homes. This loads present several Power Quality problems to the electrical grid. The conventional solutions do not solve these problems in a suitable way. Therefore, it is necessary to find new solutions such as Active Power Filters. This paper presents and discusses the main steps that...

Transformerless series active power filter to compensate voltage disturbances

This paper presents a transformerless topology of series active power filter with capability to protect sensitive loads against harmonics, sags, swells and unbalances of the power system voltages. The proposed topology is constituted by three isolated H-bridge with a voltage source at the DC side. The series active power filter has been studied with the help of PSIM (Power Simulation software) and simulatio...

Simulations of a Current-Source Shunt Active Power Filter with Carrier-Based PW...

Bruno Exposto, Helder Carneiro, J. G. Pinto, Carlos Couto, João L. Afonso, "Simulations of a current-source Shunt Active Power Filter with Carrier-Based PWM and Periodic Sampling Modulation Techniques" Proceedings of the 2011-14th European Conference on Power Electronics and Applications (EPE 2011), pp.1-8, 30 Aug. – 1 Sept., 2011. ; This paper presents a Shunt Active Power Filter that is built using a current...

Tricobezoar gástrico gigante: relato de caso e revisão da literatura

Os autores descrevem um caso de massa abdominal epigástrica palpável associada a sintomas dispépticos em uma paciente jovem sem antecedentes patológicos. Estudos por imagem evidenciaram corpo estranho gástrico de "aspecto enovelado". A paciente foi submetida a gastrotomia via laparotomia, com retirada de um tricobezoar de 1.950 gramas.

A 2.4-GHz CMOS short-range wireless-sensor-network interface for automotive app...

This paper describes a CMOS interface for shortrange wireless sensor networks (CMOS-SRWSN interface). The sensor interface is composed of a sensor readout, electronics for processing and control, a memory, a radio-frequency CMOS transceiver for operation in the 2.4-GHz industrial, scientific, and medical bands, and a planar antenna. The receiver has a sensitivity of −60 dBm and consumes 6.3 mW from a 1.8-V supp...

A control strategy for a three-phase four-wire shunt active filter

This paper presents a control strategy for a three- phase four-wire shunt active filter. The shunt active filter is a custom-power device capable to compensate, in real time, harmonics, unbalances and power factor in an electrical installation. In this work the power circuit is based on a three-leg IGBT inverter, with the dc-link composed by two capacitors connected in split. Thus the neutral point is con...