68,00 € *

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Recent proliferation of non-linear loads such as adjustable-speed motor drives, power supplies and inverters have raised serious concerns on the quality and reliability of electrical distribution networks. These loads draw excessive harmonic currents which interact with a wide range of power system components, causing significant deterioration in the power quality. Although traditional passive filtering has been commonly used to mitigate these problems, recent advances in power electronic converters have sparked the interest in active power filter (APF) approach. This book describes the design, analysis and implementation of a hybrid APF connected to a photovoltaic system. The integration improves the harmonic filtering performance of a basic shunt APF while simultaneously supplying power from the photovoltaic array to the load. The compensation current reference for the APF is derived from the extension instantaneous reactive-power theorem. It simplifies the current reference estimation, leading to a more efficient implementation using digital signal processor.

Anbieter: Dodax

Stand: 23.01.2020 Zum Angebot

Stand: 23.01.2020 Zum Angebot

37,00 € *

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The harmonics and reactive power cause a number of undesirable effects like heating, equipment damage and Electromagnetic Interference effects in the power system. The conventional method to mitigate the harmonics and reactive power compensation is by using passive LC filters but this method has drawbacks like large size, resonance problem and fixed compensation behavior etc, Subsequently, the active power filter (APF) comes in to the picture, which gives promising solution to compensate harmonics and reactive power simultaneously by using suitable control algorithms. Different APF topology has proposed by many authors, such as series, shunt and hybrid type and these may be based on current source or voltage source. Series APF is used to compensate the voltage harmonics and shunt type for current harmonics.

Anbieter: Dodax AT

Stand: 23.01.2020 Zum Angebot

Stand: 23.01.2020 Zum Angebot

35,90 € *

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Anbieter: Dodax

Stand: 23.01.2020 Zum Angebot

Stand: 23.01.2020 Zum Angebot

57,50 € *

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An effective technique to mitigate harmonics from grid connected wind turbines. The proposed method comprised of shunt active power filter (APF). The switching of APF is carried out by hysteresis band current controller. In order to validate the system performance, two reference current generation techniques have been used (pq theory and SRF theory). The results achieved from SRF theory were satisfied and more accurate as compared to pq theory. The proposed controller mitigates the harmonics and satisfies the international harmonic standard set in IEEE-519.

Anbieter: Dodax AT

Stand: 23.01.2020 Zum Angebot

Stand: 23.01.2020 Zum Angebot

55,90 € *

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Anbieter: Dodax

Stand: 23.01.2020 Zum Angebot

Stand: 23.01.2020 Zum Angebot

50,40 € *

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In recent years there has been a substantial increase in the demand for controllable reactive power sources which can compensate for large lagging loads. These requirements involve precise and continuous reactive power control with fast response time and avoidance of harmonic line current generation. Solid state Var compensators using forced commutated converters have been developed and are being used for this purpose. Active power filtering (APF) can provide VAr compensation by injecting equal but opposite distortion at selected points in a network. The objective of this project is to design an Active Power Filter (APF) using Voltage Source Inverter (VSI) to achieve reactive power compensation. It is achieved by forcing the inverter line current to follow a reactive sinusoidal reference at a constant switching frequency. The current reference generator has been designed for both lagging and leading reactive power conditions. The reactive power requirements of a bridge rectifier connected load are estimated using the above current reference generator. Using this, an APF is designed to compensate the reactive power requirements of the above load.

Anbieter: Dodax AT

Stand: 23.01.2020 Zum Angebot

Stand: 23.01.2020 Zum Angebot

49,00 € *

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Anbieter: Dodax

Stand: 23.01.2020 Zum Angebot

Stand: 23.01.2020 Zum Angebot

37,00 € *

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Power quality and voltage/current harmonics have been matter of concern in most research on power networks since many years ago. This problem is aggravated in harmonic environment caused by power electronic converters. The harmonic components distort the ac current and voltage at the point of common coupling (PCC) and therefore affects the other adjacent loads connected to the same bus. Excessive reactive power demand increases feeder losses and reduces the active power flow capability of distribution system. Moreover, unbalancing affects the operation of transformers and generators. Presence of power filters using semiconductor switches has proved to be a solution to the electric distribution system facing these problems (reactive power, harmonics, and unbalanced loading). One of the equipment which is used to eliminate such harmonics is active power filter (APF) that is employed in many power networks and industries to suppress the current harmonics generated by nonlinear loads like rectifiers. The major issue related to the effective operation of APF is its controllability to compensate reactive power, harmonics, and unbalanced loading.

Anbieter: Dodax AT

Stand: 23.01.2020 Zum Angebot

Stand: 23.01.2020 Zum Angebot

35,90 € *

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ggf. zzgl. Versand

Anbieter: Dodax

Stand: 23.01.2020 Zum Angebot

Stand: 23.01.2020 Zum Angebot