Novel multi-device unified powerquality conditioner for powerquality improvement

Abstract

This paper describes the customizable multi-device unified power-quality conditioner (MD-UPQC) is designed especially for multi-feeder distribution networks. The proposed MD-UPQC can exchange the power between the multi-feeders and proficiently mitigates all voltage-current associated power-quality problems, make sure to maintain balanced power-flow to consumers. At recent days, various manufacturers recommend the provision of multilevel inverters in mid-range customized compensation devices with desirable control schemes. In distinct, the 5-level diode-clamped multi-level inverter (DCMLI) is best suited for MD-UPQC over traditional 3-level voltage source inverter (VSI) topology for attaining enhanced features. In this paper, MD-UPQC has been proposed with three 5-level DCMLI modules interfaced as back-to-back with a common direct current (DC) capacitor. The simplified phase-dispositional modulation technique is easily assembled with proposed universal voltage-current reference controller for significant functioning of DCMLI-MDUPQC device. The operation and performance of proposed model and its control scheme is evaluated with MATLAB/Simulink computational tool, simulation results are presented.

A novel reduced-switch multi-level inverter based multi-device universal power-quality conditioner for PQ enhancement

“…It generates reference signals by detecting the load voltage value and generating unified vector values in a pre-synchronized angle (s) using a discrete phase-locked loop (DPLL). The authors present the mathematical modeling and design of the suggested UVCR control method in [27]. The measured values and the derived reference current-voltage signals from the UVCR control scheme are propagated using the RCB-PWM approach.…”

“…The working and performance of the proposed UVCRcontrolled RSMLI-MDUPQC device under various PQ signatures have been evaluated through the MATLAB/Simulink software tool and simulation results are illustrated. The system specifications and the values are stated in [27] and depicted in…”

“…The investigation conducted in [26], [27] explores the synchronous reference frame (SRF) control and instantaneous real-power (IRP) control schemes [28], [29], which are widely recognized methods for extracting reference voltage-current in power systems. These methods are subject to limitations such as intricate transformations, intricate mathematical logic, and response latency.…”

PQ enhancement in grid connected EV charging station using novel GVCR control algorithm for AUPQC device

“…By using this CPC technology, various custom-power devices have been designed for compensation of associated voltage-current PQ problems to formulate the PCC of electric-grid as balanced, sinusoidal shape, fundamental nature as per IEC/IEEE standards [11]- [13]. The classification of CPC devices has been selected based on distinct PQ concerns which including, active power filters (APF's) [14], dynamic voltage regulators (DVR's) [15], distributed static compensators (DSTATCOM's) [16] and universal power-quality conditioners (UPQC) [17]- [19]. Among the aforementioned CPC devices, the AUPQC's has been specifically developing for power distribution system is explored in [20].…”

Analysis of single-phase cascaded H-bridge multilevel inverters under variable power conditions

“…The authors offer a three-phase CHB inverter with a third harmonic correction mechanism (THCS). Then, for single phase CHB inverters, a THCS methodology is developed that effectively overcomes the shortcomings of the previous techniques [4], [5]. That is, it ensures that the system can function with a unit power factor and a reasonably small change in DC-link voltage while without reducing power output.…”