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Power quality conditioners were originally meant to provide protection to electrical loads connected to the power system against power quality disturbances. Such protection feature brings mostly intangible benefits that are difficult to quantify in monetary terms. This is the reason why some providers of power quality solutions focus more on promote energy savings benefits rather than emphasize the protection feature at the time of advertising their products. Sometimes, the energy savings are exaggerated and inflated with the aim to present a more convincing argument to the customers about why they should acquire a particular solution. This technical paper present presents two formulas that determine the theoretical maximum energy savings that can be achieved when a power quality conditioner targets current harmonics within an industrial facility. In particular, the formulas predict the maximum amount of harmonic active power that can be recovered by power quality conditioners (e.g. harmonic active power filter) in a three-wire three-phase system that contains linear and nonlinear loads. The upper bound of the harmonic active power is the total harmonic apparent power. The upper bound is given in function of the Total Harmonic Distortion of the current and the voltage measured at the point of common coupling and total apparent power of the loads.
Rodrigo Guzman Iturra; Peter Thiemann. Limits of Harmonic Power Recovery by Power Quality Conditioners in Three-Phase Three-Wire Systems Under Non-sinusoidal Conditions. Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering 2021, 15 -29.
AMA StyleRodrigo Guzman Iturra, Peter Thiemann. Limits of Harmonic Power Recovery by Power Quality Conditioners in Three-Phase Three-Wire Systems Under Non-sinusoidal Conditions. Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering. 2021; ():15-29.
Chicago/Turabian StyleRodrigo Guzman Iturra; Peter Thiemann. 2021. "Limits of Harmonic Power Recovery by Power Quality Conditioners in Three-Phase Three-Wire Systems Under Non-sinusoidal Conditions." Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering , no. : 15-29.
Grid Tie Three Phase Voltage PWM converters can be conceived as current sources that inject currents into the grid at the point of common coupling (PCC). In order to achieve a good performance, the voltage source inverter (VSI) should be commanded by a current controller to track as accurate as possible a current reference. Pulse with modulation (PWM) and space vector modulation (SVM) are two techniques used in VSIs to generate the time average output voltage demanded by the current controller. By using the average model of the VSI, controlled either by PWM or by SVM, we can use feedback linear control for the analysis and design of the current controller. The main goal of this technical paper is to illustrate an analytical formula to calculate the gains of the proportional-integral current controller. The gains are calculated based on the values of the coupling inductivity, the DC Bus voltage and the switching frequency and given for two PWM modulation methods.
Rodrigo Guzman Iturra; Peter Thiemann. Design of Current Controllers for Three Phase Voltage PWM Converters for Different Modulation Methods. Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering 2021, 3 -14.
AMA StyleRodrigo Guzman Iturra, Peter Thiemann. Design of Current Controllers for Three Phase Voltage PWM Converters for Different Modulation Methods. Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering. 2021; ():3-14.
Chicago/Turabian StyleRodrigo Guzman Iturra; Peter Thiemann. 2021. "Design of Current Controllers for Three Phase Voltage PWM Converters for Different Modulation Methods." Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering , no. : 3-14.
Power quality conditioner systems, such as shunt active power filters (SAPFs), are typically required to have low power losses, high-power density, and to produce no electromagnetic interference to other devices connected to the grid. At the present, power converters with such a features are built using multilevel topologies based on pure silicon semiconductors. However, recently new semiconductors that offer massive reduction of power losses such as silicon carbide (SiC) MOSFETs have been introduced into the power electronics field. In the near future, the applications that demand the highest performance will be powered by multilevel converters based on SiC. In this paper a highly efficient three-level (3L) topology based entirely on silicon carbide (SiC) semiconductors for a SAPF is presented and analyzed in great detail. Furthermore, the proposed topology is compared with other full SiC-based conventional topologies: two level (2L), three-level T-type (3L-TNPC), and three-level neutral-point-clamped (3L-NPC) in terms of efficiency. The proposed asymmetrical topology has an efficiency superior to conventional all SiC 2L and 3L power circuits when the pulse or switching frequency of the system is set higher than 60 kHz. Further, for high current ratings, the asymmetrical topology has the advantage that it can be built just by cascading two half-bridge SiC modules.
Rodrigo Guzman Iturra; Peter Thiemann. Asymmetrical Three-Level Inverter SiC-Based Topology for High Performance Shunt Active Power Filter. Energies 2019, 13, 141 .
AMA StyleRodrigo Guzman Iturra, Peter Thiemann. Asymmetrical Three-Level Inverter SiC-Based Topology for High Performance Shunt Active Power Filter. Energies. 2019; 13 (1):141.
Chicago/Turabian StyleRodrigo Guzman Iturra; Peter Thiemann. 2019. "Asymmetrical Three-Level Inverter SiC-Based Topology for High Performance Shunt Active Power Filter." Energies 13, no. 1: 141.