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The impact of power-electronic devices in naval applications is growing steadily. In combination with the available low short-circuit power, the converters-here, pole-restraining controlled-have to guarantee power quality within these grids. Concerning reactive power, voltage levels and frequency control conventional power-plant control mechanisms can be adapted - which are not discussed here. Concerning...
Over the past decade, power quality (PQ) issues became increasingly important. The most cited PQ problems are voltage dips, harmonic distortion and transient phenomena. The tarification method which is mostly used, tarifies the instantaneous active power. When absorbing harmonic power, e.g. when using an active filter, the customer has to pay for this. To overcome this, a tarification method is proposed...
In this paper, the joined reactive power compensator and active filter functionality, of a grid connected two level Voltage Source Converter (VSC), is explored. This VSC, fulfills two different objectives: Compensate current harmonics demanded by non-linear loads (active filter application) and exchange reactive power with a grid subjected to balanced and unbalanced dips. For that purpose, a coordinated...
The conventional passive filtering has been outdated since it detune with age, this may affect its filtering performance and also cause resonance problems, active power filters (APFs) are attractive solutions to solve harmonic-related power quality problems due to the development of power semiconductors, control theory and digital signal processors (DSP), and they have become the first choice for...
With the continuous development of water-saving irrigation, agricultural productpsilas deep process, greenhouse control in the agriculture, more and more variable frequency equipments, rectifier devices and other power electronic equipments have been used. But owing to the use of these equipments, harmonic pollution problem in power grid is more serious. Active filter is an effective method to the...
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