An Optimized Shunt Hybrid Power Quality Conditioner Based on an Adaptive Neural Network for Power Quality Improvement in Power Distribution Network

Dynamic Voltage Restorer (DVR) is a series connected power electronics based custom power device that is used to improve voltage disturbances in low voltage electrical power distribution network. Power quality requirement is one of the most important concerns for power system. The parts of the DVR is made up of voltage source inverter, injection/booster transformer, a harmonic filter, an energy storage device and a bypass switch. The DVR is used to inject three phase voltage in series and in synchronism with the network voltages in order to compensate voltage disturbances with a benefit of active /reactive power control. This paper presents a review of the researches on the dynamic voltage restorer application for power quality improvement in low voltage electrical power distribution networks. It describes power quality issues, principle of operation of DVR, basic components of DVR, DVRs control topologies in distribution network, DVR control strategies and compensation techniques.

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Photovoltaic tied unified power quality conditioner topology based on a novel notch filter utilized control algorithm for power quality improvement

Transactions of the Institute of Measurement and Control ◽

10.1177/0142331218790314 ◽

2018 ◽

Vol 41 (7) ◽

pp. 1912-1922 ◽

Cited By ~ 5

Author(s):

Santanu Kumar Dash ◽

Pravat Kumar Ray

Keyword(s):

Quality Improvement ◽

Power Quality ◽

Power Distribution ◽

Control Algorithm ◽

Notch Filter ◽

Zero Crossing ◽

Unified Power Quality Conditioner ◽

Power Quality Improvement ◽

Quality Issues ◽

Power Quality Conditioner

Nonlinear loads and grid side disturbances in the power distribution network cause harmonic rich currents and voltage perturbations such as voltage harmonics, voltage sags and voltage swells. The unified power quality conditioner (UPQC) with shunt inverter and series inverter are usually employed for elimination of current and voltage related power quality issues. However, elimination of voltage and current quality issues in a grid connected Photovoltaic (PV) system is essential. Therefore, PV integrated UPQC topology is proposed in this paper with a novel controller for power quality improvement. The control algorithm based on notch filter Phase Locked Loop (PLL) is utilized for proper phase detection and elimination of voltage and current disturbances. PV tied UPQC controller based on notch filter PLL has the capability to avoid multiple zero crossing during highly distorted grid voltage condition. Conventional control algorithms such as synchronous reference frame theory, unit vector controller based on traditional PLL are also analyzed for the control of PV tied UPQC. The proposed system is developed in Matlab/Simulink and the results obtained are evaluated to measure the performance. A real-time hardware prototype is developed using dSPACE processor. The obtained experimental results validate the efficiency of the proposed controller for PV tied UPQC.

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Review on the Techniques Used for Enhancing Performance of UPQC Structures

SMART MOVES JOURNAL IJOSCIENCE ◽

10.24113/ijoscience.v7i11.423 ◽

2021 ◽

pp. 42-45

Author(s):

Sikandra Kumar Mandal ◽

Nishi Singh

Keyword(s):

Power Quality ◽

Power Distribution ◽

Power Flow ◽

Distribution Network ◽

Power Distribution Network ◽

Unified Power Quality Conditioner ◽

Power Quality Conditioner

In a power transmitting network, a Unified Power Quality Conditioner is used to operate both shunt— connected and series-connected compensation simultaneously. Destabilize, disturbance, and sometimes even dc elements can all be found in a power distribution network. As a result, a UPQC (Unified Power Quality Conditioner) outperforms a Unified Power Flow Conditioner (UPFC) in many of these areas to offer shunt-connected or series-connected compensation. The main objective of this paper is to provide the overview, different designs given by many researchers to improve the performance of the UPQC.

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