Multi-Level Inverter Topologies Based UPQC Applied to Distribution Systems for Power Quality Improvement
Shiwani Rai1, Mukesh Kumar Kirar2, Yogendra Kumar3
1Shiwani Rai*, his/her department, Department of Electrical Engineering, MANIT, Bhopal, India.
2Mukesh Kumar Kirar, Department of Electrical Engineering, MANIT, Bhopal, India.
3Yogendra Kumar, department, Department of Electrical Engineering, MANIT, Bhopal, India.

Manuscript received on November 12, 2019. | Revised Manuscript received on November 25, 2019. | Manuscript published on 30 November, 2019. | PP: 5129-5135| Volume-8 Issue-4, November 2019. | Retrieval Number: D8329118419/2019©BEIESP | DOI: 10.35940/ijrte.D8329.118419

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Abstract: At distribution side most type of loads connected are non-linear types. These loads adversely affect the power quality of the system. If not rectified at times they may distort the sine wave at source side. This paper presents a power quality conditioner which is designed using multi-level inverter (MLI). The advantage that the proposed MLI has over conventional one is that it requires less number of components as compared to the conventional. Also it improves the utility profile by improving harmonic content at output side. The proposed MLI based Unified power Quality Conditioner (UPQC) improves the grid profile at non-linear loading by prohibiting the propagation of high content harmonic load current at source side. The proposed topology has inherent active filtering capability by virtue of which there has been seen a good mitigation of power quality issues at point of common coupling. Comparative analysis of the proposed topology with the conventional MLI is also presented. The comparison of results is also presented in terms of linear and non-linear loading in a UPQC compensated distribution system.
Keywords: Unified Power Quality Conditioner, Multilevel Inverter, Harmonic Distortion, Neutral Point Clamped, Cascaded Inverter.
Scope of the Article: Quality Assurance Process, Standards, and Systems.