Topic
Topology (electrical circuits)
About: Topology (electrical circuits) is a research topic. Over the lifetime, 33316 publications have been published within this topic receiving 397651 citations. The topic is also known as: topology.
Papers published on a yearly basis
Papers
More filters
TL;DR: In this paper, an efficient dc bidirectional fault current limiter and interrupter (FCLI) based on Z-source topology is proposed to overcome some of the challenges in dc microgrids.
Abstract: DC microgrids have some attractive characteristics, which have being investigated to utilize in future electrical power systems. However, they have several essential challenges, such as limiting and interrupting fault current, which should be rectified to have high-performance dc microgrids. In this paper, an efficient dc bidirectional fault current limiter and interrupter (FCLI) based on Z-source topology is proposed to overcome some of the challenges in dc microgrids. The FCLI is a multifunction device, by which power flow direction control, circuit breaking, fault current limiting, and interrupting in a dc system can be handled. Analytical analysis of the FCLI is discussed in detail for different operation modes. Performance of the proposed FCLI in the different operation modes is evaluated using some simulations and experiments. The results confirm high capability of the device to realize appropriate operation in dc systems. Fast response time of fault current limitation and interruption, simple and reliable structure, and negligible conduction loss are the main features of the proposed FCLI.
91 citations
TL;DR: In this study, a new topology of semi-cascaded multilevel inverter is proposed which is a proper alternative to be used in medium voltage applications and works with lower total peak inverse voltage.
Abstract: In this study, a new topology of semi-cascaded multilevel inverter is proposed which is a proper alternative to be used in medium voltage applications. This structure consists of series connected sub-multilevel inverters blocks. The proposed topology is based on the connections of several cell units in an appropriate scheme with the help of six power switches. Compared to the traditional cascaded multilevel inverter, in suggested topology the number of switches, inverter cost and installation area are reduced significantly. Also, in comparison with semi-cascaded multilevel inverter, the proposed inverter works with lower total peak inverse voltage. The proposed inverter is able to be used as an asymmetrical inverter. To verify the operation and good performance of the proposed inverter the simulation and experimental results are obtained.
91 citations
01 Jan 2000
TL;DR: In this paper, an energy storage system based on battery and supercapacitors is presented, where the properties of the proposed system are oriented in high efficiency, in a special topology with parallel channels.
Abstract: An energy storage system based on battery and supercapacitors is presented. It allows bigger amount of intantaneous power. The properties of the proposed system are oriented in high efficiency, in a special topology with parallel channels. The paper presents also an active sharing device, for equalizing the voltages across a series connection of supercapacitor. Based on a buck-boost topology, this device ensures an optimal value for the stored energy, with a high equalizingciency.
91 citations
29 Jun 1992
TL;DR: In this article, an active power filter is proposed for balancing unbalanced loads in a three-phase, PWM (pulsewidth-modulated) AC-to-DC converter with inductive energy storage.
Abstract: An active power filter is proposed for balancing unbalanced loads. A three-phase, PWM (pulse-width-modulated) AC-to-DC converter topology with inductive energy storage is controlled to continuously inject desired negative sequence currents into the distribution system to achieve balancing of continuously varying unbalanced loads. The principle of operation is as follows: the negative sequence components of the load currents are measured in magnitude and in phase and the PWM-controlled active power filter is controlled to inject currents opposite to these quantities, thereby achieving the balancing function. The operation of the proposed system and the selection of the active power filter components are discussed in detail. Experimental filter operation is verified for an unbalanced load. >
91 citations
TL;DR: In this paper, a series-parallel resonant converter (SPRC) operating in the continuous conduction mode (CCM) using Fourier series techniques was derived under steady-state conditions to provide simple design tools.
Abstract: A frequency-domain steady-state analysis is given for a series-parallel resonant converter (SPRC) operating in the continuous conduction mode (CCM) using Fourier series techniques. Equations for performance parameters are derived under steady-state conditions to provide simple design tools. The topology of the SPRC combines the advantageous properties of both the series resonant converter (SRC) and the parallel resonant converter (PRC). The key results of the work are: a novel half-wave rectifier SPRC, conditions for obtaining high part-load efficiency; and several boundary frequencies and limiting conditions such as the capacitive/inductive load boundary and open-circuit and short-circuit cases. Experimental results measured for an 80-W converter above the resonance at different load resistances and input voltages show excellent agreement with the theoretical performance predicted by the equations. >
91 citations