scholarly journals Mathematical Relationships of Linearized Modeling Methods of AC Power Electronic Systems

2021 ◽  
Author(s):  
Yicheng Liao ◽  
xiongfei wang
Keyword(s):  
Frequency Domain ◽  
Reference Frames ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Electronic Systems ◽  
Power Electronic ◽  
Modeling Methods ◽  
Ac Power ◽  
Dynamic Phasor ◽  
Mathematical Relationships

The harmonic state-space, the dynamic phasor, and the generalized <i>dq</i> modeling are three methods developed for linearization of ac power electronic systems. This paper reveals explicitly mathematical relationships between the three modeling methods in both time and frequency domain. Representations of linearized models in different reference frames and from time domain to frequency domain, as well as their transformations are elaborated step by step. Case studies on a three-phase voltage-source converter that is connected to an unbalanced grid verify the theoretical findings.<br>

scholarly journals Mathematical Relationships of Linearized Modeling Methods of AC Power Electronic Systems

2021 ◽  
Author(s):  
Yicheng Liao ◽  
xiongfei wang
Keyword(s):  
Frequency Domain ◽  
Reference Frames ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Electronic Systems ◽  
Power Electronic ◽  
Modeling Methods ◽  
Ac Power ◽  
Dynamic Phasor ◽  
Mathematical Relationships

The harmonic state-space, the dynamic phasor, and the generalized <i>dq</i> modeling are three methods developed for linearization of ac power electronic systems. This paper reveals explicitly mathematical relationships between the three modeling methods in both time and frequency domain. Representations of linearized models in different reference frames and from time domain to frequency domain, as well as their transformations are elaborated step by step. Case studies on a three-phase voltage-source converter that is connected to an unbalanced grid verify the theoretical findings.<br>

scholarly journals Mathematical Relationships of Linearized Modeling Methods of AC Power Electronic Systems

2021 ◽  
Author(s):  
Yicheng Liao ◽  
xiongfei wang
Keyword(s):  
Frequency Domain ◽  
Reference Frames ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Electronic Systems ◽  
Power Electronic ◽  
Modeling Methods ◽  
Ac Power ◽  
Dynamic Phasor ◽  
Mathematical Relationships

The harmonic state-space, the dynamic phasor, and the generalized <i>dq</i> modeling are three methods developed for linearization of ac power electronic systems. This paper reveals explicitly mathematical relationships between the three modeling methods in both time and frequency domain. Representations of linearized models in different reference frames and from time domain to frequency domain, as well as their transformations are elaborated step by step. Case studies on a three-phase voltage-source converter that is connected to an unbalanced grid verify the theoretical findings.<br>

scholarly journals Hybrid Converter to Supply DC and AC Loads Using Tapped Boost Topology

2018 ◽  
Vol 7 (3.8) ◽  
pp. 48
Author(s):  
Goutham Menon ◽  
Mahesh Ratheesh ◽  
Gopikrishna S Menon ◽  
Gautham S ◽  
P Kanakasabapathy
Keyword(s):  
Steady State ◽  
Power Systems ◽  
Boost Converter ◽  
Voltage Source ◽  
Electronic Systems ◽  
Power Electronic ◽  
Voltage Source Inverter ◽  
Smart Power ◽  
Steady State Analysis ◽  
Operating Modes

Advancements in power electronic systems has brought forth the modernization of residential power systems exponentially. The interfacing of AC and DC loads with various kinds of resources of energy has been achieved with the help of modern nanogrid architectures. This paper brings into depiction a Tapped Boost derived hybrid converter that can be used to meet the demands of both AC and DC loads having a solitary DC input. A voltage source inverter (VSI) bridge network is used instead of the single switch of a Tapped Boost converter. The VSI bridge has shoot-through protection in the inverter stage increasing its importance for smart power systems. The Tapped Boost derived converter also borrows the advantages provided by the Tapped Boost converter. The paper covers topics like the operation, steady-state analysis and operating modes of the proposed Tapped Boost-DHC. The output and input characteristics has also been tested and verified through simulatio

A Large-Power Voltage Source Converter for FACTS Applications Combining Three-Level Neutral-Point-Clamped Power Electronic Building Blocks

2013 ◽  
Vol 60 (11) ◽  
pp. 4759-4772 ◽  
Author(s):  
Javier Chivite-Zabalza ◽  
Miguel Angel Rodriguez Vidal ◽  
Pedro Izurza-Moreno ◽  
Gorka Calvo ◽  
Danel Madariaga
Keyword(s):  
Building Blocks ◽  
Neutral Point ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Power Electronic ◽  
Large Power

scholarly journals Active Power Filtering Embedded in the Frequency Control of an Offshore Wind Farm Connected to a Diode-Rectifier-Based HVDC Link

Energies ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 2718 ◽  
Author(s):  
Ashkan Nami ◽  
José Amenedo ◽  
Santiago Gómez ◽  
Miguel Álvarez
Keyword(s):  
Wind Farm ◽  
Frequency Control ◽  
Harmonic Distortion ◽  
Active Power ◽  
Offshore Wind ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Offshore Wind Farm ◽  
Harmonic Compensation ◽  
Dynamic Phasor

This paper presents a novel active power filtering (APF) scheme embedded in a centralised frequency control of an offshore wind farm (OWF) connected to a high voltage direct current link through a diode rectifier station. The APF is carried out by a voltage source converter (VSC), which is connected to the rectifier station to provide frequency control for the offshore ac-grid. The proposed APF scheme eliminates harmonic currents at a capacitor bank placed at the rectifier station. This leads to a significant reduction in the total harmonic distortion of the offshore ac-grid voltage, and thus, to an improvement in the OWF power. Hence, the rectifier passive ac-filter bank is not needed anymore. A new selective harmonic compensation method based on the dynamic phasor (DP) theory is used in the proposed APF scheme which allows the extraction of the phasor form of harmonics in dc-signals. Therefore, the well-known proportional-integral regulators are used for the harmonic current compensation. Moreover, the offshore ac-grid is modelled for the system harmonic analysis using a grid solution based on the DP theory. Finally, a VSC power rating analysis is studied. The performance of the proposal is validated by simulations in both steady-state and transient conditions.

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