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The article focuses on experimental measurement of multi-carrier narrowband Power Line Communication. The aim of experimental measurements was comparison of multi-carrier narrowband Power Line Communication from the view-point of possible communication distance, available data rate and impact of noise. The specifications G3-PLC and PRIME are considered. The field test results and data rate measurements...
The working performance of modular multilevel converters (MMC) is directly affected by the circulating current. This paper presents a circulating current suppressing technique based on internal model control (IMC) applied in conventional NLM modulation scheme and double loop upper control hierarchy. According to the instantaneous energy balance between AC and DC sides, the mathematical model of circulating...
The forecasted traffic growth makes the transmission capacity in backbone optical networks a scarce resource. Enabling the use of high-spectral-efficiency modulation formats (HSE-MFs) such as DQPSK or PM-QPSK for 40 or 100 Gbps respectively is one of the suggested on-going researches. However, some lightpaths may not require the highest rate and this call for mixed-line rate (MLR) networks. In MLR...
In this paper, a Space Vector Modulation for the Three-Level Simplified Neutral Point Clamped (3L-SNPC) inverter is introduced. Models for the DC link dynamics and the 3L-SNPC inverter topology are developed. Different switching sequences are analyzed and compared. The neutral point balancing capability of the inverter is compared with conventional 3L-NPC inverter topologies. Simulation and experimental...
It has been a hot issue and also a difficulty to study the fault tolerance of multilevel converters. The topology changes to eight-switch three-phase inverter (ESTPI) if one leg of three-level NPC inverter is failed. An optimal modulation algorithm of ESTPI is proposed in this paper. Due to the loss of one leg, the DC-link voltage utilization of ESTPI is reduced by half. Hence, an overmodulation algorithm...
This paper presents a unified control design approach involving four topologies of shunt active power filters (SAPF), which can be applied to three-phase four-wire distribution systems. The SAPF structures are deployed by means of the following inverter topologies: full-bridge composed of three modules, four-legs, split-capacitor and neutral point clamped. The SAPFs are compared to each other through...
The Flying Capacitor Converter (FCC) offers an attractive alternative to conventional 2-IeveI converter topologies due to the easily acquired high number of voltage levels and the increased effective switching frequency. However, balancing of the flying capacitor (FC) voltages is crucial in practice since a deviation from the nominal voltage levels increases harmonics in the output voltage and, more...
The paper presents a design method of a gallium-nitride high-electron-mobility-transistor (GaN-HEMT) based three level T-type neutral-point-clamped (NPC) inverter using a reverse-conducting mode of the GaN-HEMT. The GaN-HEMT provides high-frequency switching speed and the T-type inverter supports such switching by decreasing conduction loss and heat dissipation. The GaN-HEMT has two operation mode,...
As the amount of decentralized generation is continuously increasing the controlling and maintaining of grid stability becomes more complex. This is caused by a change of production capacities from the high voltage area into the distribution network. In order to ensure stability of future smart grids a new 3-Level 4-Leg inverter as a part of a power electronic regulator is introduced. This topology...
Recent research on high voltage and power DC/DC converter mainly focus on the face-to-face topology based on modular multilevel converters (MMC). The topology consists of two MMC which are coupled by a transformer. It is easy to extend the module number according to the voltage level. However, the present modulation method in this topology cannot regulate the voltage transformation ratio on two dc...
This work will present a novel photovoltaic (PV) inverter with integrated short-term storage. The topology combines advantages of microinverter topologies, such as module-specific maximum-power-point tracking, failure-tolerance, safety due to limited voltages, modularity, use of low-cost low-voltage components such as silicon field-effect transistors (FET), and simple expandability, with those of...
Recently, a novel hybrid multilevel inverter topology, the EDA5, was presented. The novel inverter topology comprises of two floating capacitors and 16 active switches to achieve five-level output voltage waveform and achieves higher efficiency at low-modulation index compared to a five-level Active Neural Point Clamped (5L-ANPC) converter. In this work, a full SiC MOSFET version of the inverter is...
High-voltage direct current transmission is a safe and efficient technology to deliver large amounts of electricity over a long distance. The number of the submodules in a voltage sourced converter high-voltage direct current (VSC-HVDC) station is usually up to hundreds. Therefore, for the manufacturer, it is necessary to establish a test platform to test the submodules quickly and conveniently. In...
Bidirectional power flow, reactive power compensation capability and high efficiency are essential for vehicle to grid (V2G) systems. In this paper, a single-phase/single-stage bidirectional AC/DC converter for V2G application is presented, which consists of a line frequency commutated unfolding bridge and an interleaved buck-boost stage. In addition to sinusoidal input current, bidirectional power...
Active neutral-point clamped five-level (ANPC-5L) converter is an attractive topology for 1500V photovoltaic generation system. In this paper, a novel and reliable modulation strategy for the active neutral-point clamped five-level inverter, including the balance control strategy of the flying capacitor voltage are proposed. In order to improve the harmonic characteristics of the output current and...
This paper proposes a decision model based on fuzzy logics to assign the route between source-destination nodes in elastic optical networks. The route is chosen dynamically based on the lowest cost criterion, which is calculated based on a weighted summation of three metrics, called availability of contiguous slots on the route, average availability of slots on the route and physical length of the...
This paper proposes a novel topology based on the interleaved H-bridge qZS inverters that is intended for the single-phase photovoltaic systems. The potential benefits are the reduced passive components and improved quality of energy generation. To control the novel topology, a proper modulation technique was developed with the required phase-shifted carriers signals and shoot-through states.
Fundamental target regarding aforementioned paper is to design a five level multi strand converter topology without a filter inasmuch as appropriated energy resources based dc-ac alteration system based dc-ac alteration system In this title we are proposing two strategies associated with five level's CHB inverter, specifically break even with step strategy and other is selective harmonic elimination...
This work make up a preliminary analysis of the comparative study between three-phase converters of two and three branches, operating like grid-side converter (GSC) of a type-3 turbine, in a three-phase three-wire power system. In such a study, these converters aim to perform ancillary services of harmonic compensation and reactive power support. The topology used for analysis is a two level structure...
The modular multilevel converter (MMC) is most widely acclaimed converter topology for high-voltage, high-power applications. Several multilevel submodules have been proposed to replace the conventional two-level submodules for MMC, allowing the reduction in the foot-print size of the converter for the same number of output voltage levels. Among them, the three-level flying capacitor (3L-FC) submodule...
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