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1. KINGSTON ENGINEERING COLLEGE
KATPADI, VELLORE-632 059
DEPARTMENT OF ELECTRICAL AND ELECTRONICS ENGINEERING
ME – POWER SYSTEM ENGINEERING
SMART GRID POWER QUALITY IMPROVEMENT USING
MODIFIED UPQC WITH MINIMAL NUMBER OF SWITCHES
Reg.No. Name
511323411003 SUGANYA.P
GUIDED BY
Dr.S.DEEPA,ME,Phd.,
ASSOCIATE PROFESSOR
3. ABSTRACT
The Smart Grid (SG) system typically deals with different issues involving
security and Power Quality (PQ) improvement.
With frequent usage of power electronic devices and nonlinear load, harmonics
are inserted into the system.
The well-known Flexible AC Transmission System (FACTS) devices like Unified
Power Quality Conditioners (UPQC) are usually employed to resolve the issues
related to voltage sag, swell, flicker, PQ, and neutral current reduction of
distribution systems.
An UPQC itself inserts harmonics into the system that affects the system stability
for sensitive loads.
4. This paper describes biogeography based optimization
(BBO) with harmonics elimination techniques for modified
UPQC connected with SG.
Lower order harmonics are eliminated by proper selection
of switching angles and at the same time the higher order
harmonics are suppressed by injecting same order
harmonics with equal magnitude but opposite in phase
from the other converter.
5. LITERATURE REVIEW
SI.
NO
AUTHORS OF THE
JOURNAL
NAME
OF THE
JOURNAL
YEAR FINDINGS FROM THE
JOURNAL
1)
T. Devaraju, M. Pala
Prasad Reddy, D.
Sujatha, R. Ravikumar,
A. Munisankar, V.
Senthilkumar,
IJEEE 2023
This paper summarize the advanced
control techniques for power quality
enhancement in off-grid wind power
systems
2)
Oluwafunso Oluwole
Osaloni, Ayodeji Stephen
Akinyemi, Abayomi
Aduragba Adebiyi,
Ayodeji Olalekan Salau.
WSEAS 2023
This paper discussed the application
of UPQC, solar power and effective
controllers.
3)
Bousnoubra Choayb ,
Djeghader yacine , Belila
hassen ICTAEE 2023
This paper summarize the latest
technology developed in UPQC,
details about the electronics
components & circuits.
4)
N. K. Agarwal, A.
Saxena, A. Prakash, A.
Singh, A. Srivastava and
A. Baluni
GCAT 2021
This paper discusses about the
problems of power quality using
UPQC
6. EXISTING SYSTEM
The excitation of Modified UPQC converters are obtained from PV (Photo-
Voltaic) panel. The firing angles of series-shunt converter are obtained in real-
time from the already stored angles in the microcontroller memory.
These systems typically on conventional control techniques such as
Synchronous Reference Frame (SRF) theory and Proportional-Integral (PI)
controllers.
While effective, these approaches face challenges in dynamic environments
with rapidly changing load conditions or grid disturbances, leading to
limitations in response time, accuracy, and harmonic suppression.
7. PROPOSED SYSTEM
The ability of energy to reach consumer devices is determined by the quality of
the power that was used to create it.
Using a Unified Power Quality Conditioner (UPQC) to improve power quality
on feeders in distribution system, this study offers a new joint that may be
utilized in conjunction with the UPQC.
The unified power quality conditioner makes use of active power filters, which
are capable of altering both voltage and current at the same time.
The UPQC connected to the feeders by means of a cable. When it comes to
resolving power quality concerns and reducing the number of transmission lines
at a substation, the Unified Power Quality Conditioner is the most effective
customized power equipment available on the market.
8. SIMULATION
In order to prove the proposed term, simulation is executed
using graphic-driven simulation software MATLAB. The same
system parameters desired dc-link voltage are used to carry out
simulation studies.
The simulation results for both the conventional term and the
proposed customized term are presented in this section for
better understanding and comparison between both the
topologies.
10. MERITS
UPQC can compensate both voltage related problems such as
voltage harmonics, voltage sags/swells, voltage flicker as well as
current related problems like reactive power compensation,
power factor correction, current harmonics and load unbalance
compensation.
There is a significant increase in interest for using UPQC in
distributed generation associated with smart grids because of
availability of high frequency switching devices and advanced fast
computing devices (microcontrollers, DSP, FPGA) at lower cost.
11. CONCLUSION
This article proposed a new custom UPQC term for four-wire
system of three phases have the ability to compensate for the
charge to a lower intermediate circuit voltage under a non-rigid
source.
The diagram of The proposal was approved strategy through
simulation and experimentation think of a distribution system in
three phases UPQC neutral term.
The term adjusted proposal offers benefits traditional closed
neutral term as a term of four phases. Point to Point near the
revisions made for traditional and custom topologies.
12. FUTURE SCOPE:
The UPQC model can be enhanced and enriched to
terminate the power quality problems in power system.
The various ways for doing that, the pro-type of this
UPQC model can be established in laboratory.
UPQC model can be established for three phase four
wire system for the non-linear load and unstable
voltage.
Here the UPQC model developed was right shunt
UPQC, further we can develop model for left shunt
UPQC.
13. REFERENCE
1. Devaraju, M. Pala Prasad Reddy, D. Sujatha, R. Ravikumar, A.
Munisankar, V. Senthilkumar, "Advanced Control Techniques for Power
Quality Enhancement in Off-Grid Wind Power Systems," SSRG International
Journal of Electrical and Electronics Engineering, vol. 10, no. 10, pp. 40-53,
2023.
2. Oluwafunso Oluwole Osaloni, Ayodeji Stephen Akinyemi, Abayomi
Aduragba Adebiyi, Ayodeji Olalekan Salau, "An Effective Control Technique
to Implement an IUPQC Design for Sensitive Loads in a Hybrid Solar PV-
Grid Connection", WSEAS TRANSACTIONS ON POWER SYSTEMS,
vol.18, pp.26, 2023.
3. Vikash Kumar Mali; Sonali Nandanwar “Power Quality Improvement by
Using a Custom Power Device UPQC (UPQC)" IEEE XPLORE, 3rd
International Conference on Energy, Power and Electrical Engineering
(EPEE), 25 December 2023.
