Implementation of unified power quality conditioner with distributed generation for improving power quality

• Main Author: Lee, Shaun Guo Hao
• Other Authors: Gooi Hoay Beng
• Format: Final Year Project
• Language: English
• Published: 2017
• Subjects: DRNTU::Engineering::Electrical and electronic engineering::Electric power
• Online Access: http://hdl.handle.net/10356/70736
• Institution: Nanyang Technological University

The increasing usage of loads that contribute towards undesirable power quality problems leads to the need for researchers to search for viable solutions to overcome them. An example of such loads is non-linear loads that inject harmonic components into a power system. This may result in distorted waveforms experienced at the supply of the system, polluting the entire network and thus, affecting other consumers sharing the same point of common coupling (PCC). A comprehensive review is done on existing compensating devices known in the industry. A study is conducted with more emphasis on Unified Power Quality Conditioner (UPQC) and its control methodology. A UPQC is an integrated device comprising a shunt and series active filter connected via a DC link capacitor that can resolve significant poor power quality problems by means of current and voltage compensations respectively. The working principles of the shunt and series converters in a UPQC and their corresponding control algorithms are designed in MATLAB/Simulink to analyse their performances independently when different types of loads are connected. Thereafter, they are integrated together and coupled with a Distributed Generation (DG) for a complete analysis of UPQC with DG. Another topology for the UPQC will also be discussed where compensation is done through reactive power control (UPQC-Q). Validation of the UPQCs operating performances is done by conducting experiments on the Triphase power module and simulation studies in Simulink. From the results taken, the effectiveness of the proposed UPQC in its ability to resolve major power quality problems satisfactorily is verified. The experimental setup introduces external factors like losses and noise that can affect the results. Overall, the results are still within the acceptable limits.