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This paper presents an adaptive biasing method for step recovery diode based comb generators which are controlled by a software routine. The aim is to provide the maximum possible harmonic output power for a given configuration and different input frequencies during input power variation. This increases the usefulness of comb generators as harmonic phase reference sources for non-linear VNA measurements...
Future power networks will include various local sources (LS)s as alternatives to centralized power generation in sustaining local loads. The cost of electrical power at LSs depends on the specific kind of the source, e.g., operating on renewable energy, using energy storage equipments, being a fuel cell, etc. In general, the cost will be proportional to the provided active power. In this paper we...
The task of reducing the energy loss is especially important for alternative electricity generation systems from renewable sources. In electromechanical systems with variable angular speed of permanent-magnet synchronous generator (PMSG), the harmonic components of generator voltages and currents in transient and steady state have impact on energy efficiency. This paper compares the energy performance...
This work is concentrated on assessment of contribution of distributed generation, represented by small hydro power plants (SHP), in power quality disturbances at low and medium voltage in distribution networks. Investigations are based on the dispersed synchronized measurements at low voltage level including two small hydro power plants and utilization substation, connected to the same medium voltage...
With development of sophisticated renewable energy technologies, paradigm shift of both power generation and power distribution is happening and happening fast. Compared with conventional power generation, renewable energy sources are installed to the utility grid in a distributed fashion, which may result in various power quality issues, such as unbalance voltage and harmonic voltage resonance. An...
Class D amplifiers are becoming the most feasible solution for embedded audio application. However, distortions due to the non-linear nature of switching stage are the main drawback for this amplifier topology. This paper discusses the design and implementation of high fidelity audio class D using sliding mode control scheme. This design method proves to be a cost effective solution for industrial...
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