Table 1.

Comparative analysis of different literature review.

Paper	Contribution	Results	Limitations
[27]	Examination of UPQC effectiveness in mitigatingpower quality issues	The effectiveness of UPQC is examined for a variety of PQ	Power electronic devices degrade power quality.
[28]	UPQC reduces power quality issues like harmonics and sag.	Study of combination of series and shunt active filters	Growing number of applications make methods ineffective
[29]	Implemented fuzzy logic-based controller for DC link control	Hybrid UPQC with distributed generation reduces power quality problems	The current state of power quality issues in industrial environments is not mentioned in the provided paper.
[30], [31]	Use of a weighted feedback algorithm to manage PCC parameters and UPQC performance.	The paper introduces a unified power quality conditioner based on the VSC theorem.	The model is restricted to static analysis