IRJET - Review Paper on RSC-MLC Base Smart PV-DSTATCOM for Multi Objective Purpose
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This document summarizes research on using a Real Switch Count Multi-Level Converter (RSC-MLC) based smart PV-DSTATCOM for multiple objectives including improving power quality, compensating reactive power flow, and optimizing the DC link voltage. A DSTATCOM uses a voltage source converter to inject current and control reactive power flow. The proposed method uses an RSC-MLC to regulate the DC link voltage from a PV source, reducing voltage stress on switches and minimizing losses. It can supply solar power to loads and compensate reactive power with battery support when solar power is unavailable. The document reviews related work on DSTATCOM control and applications and provides details on controlling the proposed RSC-MLC based PV-
![International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056
p-ISSN: 2395-0072Volume: 07 Issue: 03 | March 2020 www.irjet.net
©2020 IRJET | Impact Factor value: 7.34 | ISO 9001:2008 Certified
Fig-1: Block diagram of D-STATCOM
At night, PV panels cannot deliver real power due to insufficient irradiation. In this case, the batteries will support the dc-link
voltage for reactive power and harmonic compensation. The real power can be shared intelligently based upon the
availability of irradiation and demand. The complete details of dc-link voltage variation using proposed RSC-MLC for
achieving power quality improvement and injection of real power is discussed below extensively.
The proliferation of non-linear, inductive and unbalanced loads in the distribution system has led to several power quality
issues. It is due to rapid rise in the use of sensitive equipment in industrial, commercial, domestic and traction applications
such as switched mode power supplies, computers, refrigerators, televisions etc. The utilization side demands controlled
supply of power which involves the use of power electronic converters. The generators produce a sinusoidal voltage but the
currents drawn by such loads are distorted and unbalanced. This affects the feeder voltage and leads to malfunctioning of
other loads connected to the same feeder. Several custom power devices (CPDs) have been used to overcome these issues.
Out of these CPDs, Distribution Static Compensators (DSTATCOMs) are extensively used for mitigating the current-based
power quality problems which include poor power factor, unbalanced currents and increased neutral current. Several
DSTATCOM topologies and their design have been covered in existing literature based on the requirement. Some
conventional methods are 4-leg.
2. LITERATURE REVIEW
[1] Sandeep Prajapati suggested the simulation and analysis of DSTATCOM for voltage sag mitigation and then harmonics
distortion and power factor improvement using LCL passive filter with DSTATCOM in distribution system. The model,
based on 2-level voltage source converter which requires only voltage measurements and reactive power measurements
are not required. The operation of simulated control method for DSTATCOM (Distribution Static Synchronous
Compensator) in MATLAB SIMULINK R2009b.
The simulation results give that voltage sags can be reduced by inserting DSTATCOM in the distribution system. After
adding the LCL passive filter to system, the THD is reduced to IEEE STD 519-1992 and power factor increased. Thus it can
help to improve power quality in distribution system by inserting DSTATCOM with LCL passive filter.
[2] Raj Arya suggested that distribution static compensator (DSTATCOM) is implemented for controlling a distributed power
generating system using a proposed composite observer based control technique. The proposed control technique is
employed for the fundamental components extraction of distorted load currents. These extracted components are used in the
estimation of reference source currents to generate gating signals of DSTATCOM. The proposed control technique is
implemented for the mitigation of reactive power, distortion in term of harmonics, and load balancing under linear/nonlinear
loads. The performance of DSTATCOM is observed satisfactory for these consumer loads with regulated generator voltage at
point of common coupling and self-supported dc link of voltage-source converter of DSTATCOM.
Journal | 3218](https://image.slidesharecdn.com/irjet-v7i3645-201226130601/85/IRJET-Review-Paper-on-RSC-MLC-Base-Smart-PV-DSTATCOM-for-Multi-Objective-Purpose-2-320.jpg)
![International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056
p-ISSN: 2395-0072Volume: 07 Issue: 03 | March 2020 www.irjet.net
©2020 IRJET | Impact Factor value: 7.34 | ISO 9001:2008 Certified
3-ph Non-
Linear
Loads
PV Systems
v
vpb
PV panel
MPPT
BC
i v
PV-output
Lsa Lsb Lsc
Rsa Rsb Rsc
v v v s
sw
+
C
R mlc sw2
ca Cdc
Vdc DC-Link
sw4
RSC-MLC
sw
VSI
DSTATCOM Cn
PV-output
BC
MPPT
PV panel
PV-output
GBC
MPPT
PV panel
[3] Bhim Singh suggested that suggested that different Distribution Static Compensators (DSTATCOMs) topologies, state of
the art, their performance, design considerations, future developments, and potential applications are investigated for power
quality improvement. These DSTATCOMs for three-phase three-wire systems and three-phase four-wire systems are
developed and installed in the distribution system for many functions, such as reactive power compensation, harmonics
elimination, load balancing, and neutral current compensation. This paper is aimed to explore a broad perspective on
DSTATCOMs to researchers, engineers, and the community dealing with the power quality improvement
[4] Divya Nair suggested that he role of FACTS (Flexible AC Transmission System) devices in addressing various power
quality issues has been studied. In FACTS, power electronic devices and their switching control schemes are used for
improving the power flow in the transmission network and hence improve the power quality and reliability of the low-
voltage distribution network. These devices can play a significant role in maximizing the power transmission capability of the
transmission network and providing high power quality at the point of common coupling (PCC) of the distribution system.
The Distributed Static Compensator or DSTATCOM is a type of FACTS controller and has the function of reactive power
compensation and harmonic mitigation. This paper discusses the use of synchronous detection algorithm for implementation
of DSTATCOM for mitigation of harmonics. The dynamic performance is analyzed and verified through simulation.
[5] Prabhir Ranjan Kasari illustrates the power quality improvement aspects in distribution system by DSTATCOM based on
d-q-0 reference frame. The utilities like domestic, commercial and industrial are facing numerous PQ problems in the form of
voltage dip, swell and voltage variations or fluctuations. The contributions of these power quality issues are severe in our
existing electrical systems nowadays. In this work the estimation and mitigation of voltage sag, voltage swell, voltage
fluctuation and reactive power limiting for different loading condition in utility by using Custom Power Devices. The D-
STATCOM has taken as a compensating device, since it known for its flexibleness, easy implementation, dynamic load
compensation & multifunctional operation. The model of D-STATCOM connected in shunt with a three-phase source feeding a
constant and a variable load, which is develop using Simulink. The Simulated result demonstrates that D-STATCOM can
consider as a feasible solution for solving voltage dip, swell and fluctuation problems.
3. PROPOSED WORK
Power Quality problems will be improved by modeling and simulation of RSC-MLC based D-STATCOM using PV power. The
Advantages of this work will be Reactive power will be compensated, switching losses of convertor will be reduce, Total
harmonic distortion will be reduces. The proposed method also provides real power to load in peak demand. The Propose
model as shown in fig-2.
Fig-2: Proposed model RSC-MLC BASE SMART PV-DSTATCOM
Journal | 3219](https://image.slidesharecdn.com/irjet-v7i3645-201226130601/85/IRJET-Review-Paper-on-RSC-MLC-Base-Smart-PV-DSTATCOM-for-Multi-Objective-Purpose-3-320.jpg)
![International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056
p-ISSN: 2395-0072Volume: 07 Issue: 03 | March 2020 www.irjet.net
©2020 IRJET | Impact Factor value: 7.34 | ISO 9001:2008 Certified
CONCLUSION
D-STATCOM is a best device to improve power quality problem in distribution system among all power devices. D-STATCOM
using real switch count multi level convertor to which solar power is given as input. Due to this technique switching losses
will be reduce as well as reactive power is compensated and total harmonic distortion will be reduces. Also real power is
provided in case of emergency by using solar power during peak demand.
REFERENCES
[1] Sandeep Prajapati,Shivani Johri, "Power Quality Improvement using D-Statcom," International Journal of Emerging
Technologies and Innovative Research,ISSN:2349-5162,Vol1,Issue 5,page no pp371-379,October 2014
[2] Sabha raj Arya,’’Power Quality Enhancement using DSTATCOM in Distributed Power Generation System”IEEE
Transactions on Industry Application (Volume: 52, Issue 6, Nov-Dec.2016)
[3] Noramin Ismail, Wan Norainin Wan Abdullah, "Enhancement of Power Quality in Distribution System Using D- STATCOM,
" The 4th International Power Engineering and Optimization Conference (PEOCO2010), Shah Alam, Selangor, MALAYSIA. 23-
24 June 2010.
[4] Rodda Shobha Rani, B. Jyothi, "VSC Based DSTATCOM & Pulse-width modulation for Power Quality Improvement,"
International Journal of Engineering Trends and Technology- Vol. 2, pp 38-41, 2011.
[5] N.Ravendra1, V.Madhusudhan2, A.Jaya Laxmi3 “Modeling and Simulation of DSTATCOM for Power Quality Enhancement
in Distribution System” International Journal of Advanced Research in Electrical, Electronics and Instrumentation
Engineering, Vol. 5, Issue 6, June 2016.
[6] Prabhir Ranjan Kasari ; Nanish Paul “Analysis of D-STATCOM for power quality enhancement in distributed network”
TENCON 2017-2017 IEEE Region 10 Conference,Penang,2017,pp. 1421-1426
[7] Divya Nair ;Megha Raveendran “Mitigation of power Quality issues using D-STATCOM’’2012 International Conference on
Emerging Trends’ in Electrical Engineering and Energy Management ,Chennai 2012,pp65-69
[8] S.R.Arya , B. Singh “Power Quality Enhancement using DSTATCOM in Distributed Power Generation System,” 2014 IEEE
International Conference on Power Electronics , Drives and Energy system(PEDES),Mumbai,2014,pp 1-6
Journal | 3220](https://image.slidesharecdn.com/irjet-v7i3645-201226130601/85/IRJET-Review-Paper-on-RSC-MLC-Base-Smart-PV-DSTATCOM-for-Multi-Objective-Purpose-4-320.jpg)
IRJET - Review Paper on RSC-MLC Base Smart PV-DSTATCOM for Multi Objective Purpose
- 1. International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 p-ISSN: 2395-0072Volume: 07 Issue: 03 | March 2020 www.irjet.net ©2020 IRJET | Impact Factor value: 7.34 | ISO 9001:2008 CertifiedJournal | 3217 Review Paper on RSC-MLC BASE SMART PV-DSTATCOM FOR MULTI OBJECTIVE PURPOSE Akshay Sanjay Kakade1, Atul Namdeo Kausal2 1Student of ME (EPS), Department of Electrical Engineering, Sau. Kamaltai Gawai Institute of Engineering &Technology, Darapur, Maharashtra India 2HOD,Department of Electrical Engineering, Sau. Kamaltai Gawai Institute of Engineering &Technology, Darapur, Maharashtra India *** Abstract- In this paper, the operation of D-STATCOM is presented and. The propose method optimized DC link Voltage, Improved power factor, compensate reactive power, reduce switching losses and harmonic distortion. The DC link voltage variation is controlled by real switch count multilevel convertor. It is also capable of supplying solar power to load. D- STATCOM modeled and simulated using MATLAB/SIMULINK software. Keywords- D-STATCOM, Power quality PV system, Harmonics, MATLAB/ SIMULINK, RSC-MLC 1. INTRODUCTION D-STATCOM is a custom power device which capable to inject a current into the system to correct the power factor and reactive power compensation and harmonics reduction’s-MLC based smart D-STATCOM improves quality of power as well as compensates the flow of reactive power by using PV Source. During off-peak loads, the dc-link voltage can be brought down to a lower value, which will reduce the voltage-stress across switches of inverter and minimizes the switching losses. The variation of dc-link voltage is provided using RSC-MLC which requires dc voltage supply. This method utilizes renewable resources of energy such as solar cells as the dc voltage source. 1.1 D-STATCOM It is a compensating device which is used to control the flow of reactive power in distribution system. It is based on voltage source converter (VSC). It absorbs or generates controllable active and reactive power. It consists of a two-level Voltage Source Converter (VSC), a dc energy storage device, a coupling transformer connected in shunt to the distribution network through a coupling transformer. Proper adjustment of magnitude and phase of the DSTATCOM output voltages allows effective control of active and reactive power exchanges between the D-STATCOM and the ac system. In this paper, the D- STATCOM will be used to regulate the voltage at the point of connection. The control will based on space vector PWM and only requires the measurement of the RMS voltage at the load point. The DC side of the converter is connected to a DC capacitor, which carries the input ripple current of the converter and is the main reactive energy storage element. This capacitor could be charged by a battery source, or could be recharged by the converter itself. If the output voltage of the VSC is equal to the AC terminal voltage, no reactive power is delivered to the system. If the output voltage is greater than the AC terminal voltage, the D-STATCOM is in the capacitive mode of operation and vice versa as shown in fig-1 1.2 RSC-MLC based PV DSTATCOM In the proposed method, the dc-link voltage regulation is achieved using Reduced Switch Count Multi Level Converter (RSC- MLC). The gate pulses of inverter switches are controlled using Hysteresis Controller which is faster and simpler. The gate pulses are derived using Instantaneous Symmetrical Component Theory (ISCT) to get the reference harmonic currents based on load demand. These harmonic currents are used to find the required reference dc-link voltage. The RSC-MLC is operated using Pulse Width Modulation (PWM) technique to obtain the desired level of dc-link voltage. The specialty of this RSC-MLC topology is reduced voltage stress at any operating condition across switches, which leads to reduction in switching losses. Due to growing consumption of conventional sources of energy, there is a huge need to employ non-conventional resources in as many applications possible because they are freely available as well as non-polluting. During day time, PV panels produce maximum real power. Therefore, the batteries can be charged and real power support can also be provided.
- 2. International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 p-ISSN: 2395-0072Volume: 07 Issue: 03 | March 2020 www.irjet.net ©2020 IRJET | Impact Factor value: 7.34 | ISO 9001:2008 Certified Fig-1: Block diagram of D-STATCOM At night, PV panels cannot deliver real power due to insufficient irradiation. In this case, the batteries will support the dc-link voltage for reactive power and harmonic compensation. The real power can be shared intelligently based upon the availability of irradiation and demand. The complete details of dc-link voltage variation using proposed RSC-MLC for achieving power quality improvement and injection of real power is discussed below extensively. The proliferation of non-linear, inductive and unbalanced loads in the distribution system has led to several power quality issues. It is due to rapid rise in the use of sensitive equipment in industrial, commercial, domestic and traction applications such as switched mode power supplies, computers, refrigerators, televisions etc. The utilization side demands controlled supply of power which involves the use of power electronic converters. The generators produce a sinusoidal voltage but the currents drawn by such loads are distorted and unbalanced. This affects the feeder voltage and leads to malfunctioning of other loads connected to the same feeder. Several custom power devices (CPDs) have been used to overcome these issues. Out of these CPDs, Distribution Static Compensators (DSTATCOMs) are extensively used for mitigating the current-based power quality problems which include poor power factor, unbalanced currents and increased neutral current. Several DSTATCOM topologies and their design have been covered in existing literature based on the requirement. Some conventional methods are 4-leg. 2. LITERATURE REVIEW [1] Sandeep Prajapati suggested the simulation and analysis of DSTATCOM for voltage sag mitigation and then harmonics distortion and power factor improvement using LCL passive filter with DSTATCOM in distribution system. The model, based on 2-level voltage source converter which requires only voltage measurements and reactive power measurements are not required. The operation of simulated control method for DSTATCOM (Distribution Static Synchronous Compensator) in MATLAB SIMULINK R2009b. The simulation results give that voltage sags can be reduced by inserting DSTATCOM in the distribution system. After adding the LCL passive filter to system, the THD is reduced to IEEE STD 519-1992 and power factor increased. Thus it can help to improve power quality in distribution system by inserting DSTATCOM with LCL passive filter. [2] Raj Arya suggested that distribution static compensator (DSTATCOM) is implemented for controlling a distributed power generating system using a proposed composite observer based control technique. The proposed control technique is employed for the fundamental components extraction of distorted load currents. These extracted components are used in the estimation of reference source currents to generate gating signals of DSTATCOM. The proposed control technique is implemented for the mitigation of reactive power, distortion in term of harmonics, and load balancing under linear/nonlinear loads. The performance of DSTATCOM is observed satisfactory for these consumer loads with regulated generator voltage at point of common coupling and self-supported dc link of voltage-source converter of DSTATCOM. Journal | 3218
- 3. International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 p-ISSN: 2395-0072Volume: 07 Issue: 03 | March 2020 www.irjet.net ©2020 IRJET | Impact Factor value: 7.34 | ISO 9001:2008 Certified 3-ph Non- Linear Loads PV Systems v vpb PV panel MPPT BC i v PV-output Lsa Lsb Lsc Rsa Rsb Rsc v v v s sw + C R mlc sw2 ca Cdc Vdc DC-Link sw4 RSC-MLC sw VSI DSTATCOM Cn PV-output BC MPPT PV panel PV-output GBC MPPT PV panel [3] Bhim Singh suggested that suggested that different Distribution Static Compensators (DSTATCOMs) topologies, state of the art, their performance, design considerations, future developments, and potential applications are investigated for power quality improvement. These DSTATCOMs for three-phase three-wire systems and three-phase four-wire systems are developed and installed in the distribution system for many functions, such as reactive power compensation, harmonics elimination, load balancing, and neutral current compensation. This paper is aimed to explore a broad perspective on DSTATCOMs to researchers, engineers, and the community dealing with the power quality improvement [4] Divya Nair suggested that he role of FACTS (Flexible AC Transmission System) devices in addressing various power quality issues has been studied. In FACTS, power electronic devices and their switching control schemes are used for improving the power flow in the transmission network and hence improve the power quality and reliability of the low- voltage distribution network. These devices can play a significant role in maximizing the power transmission capability of the transmission network and providing high power quality at the point of common coupling (PCC) of the distribution system. The Distributed Static Compensator or DSTATCOM is a type of FACTS controller and has the function of reactive power compensation and harmonic mitigation. This paper discusses the use of synchronous detection algorithm for implementation of DSTATCOM for mitigation of harmonics. The dynamic performance is analyzed and verified through simulation. [5] Prabhir Ranjan Kasari illustrates the power quality improvement aspects in distribution system by DSTATCOM based on d-q-0 reference frame. The utilities like domestic, commercial and industrial are facing numerous PQ problems in the form of voltage dip, swell and voltage variations or fluctuations. The contributions of these power quality issues are severe in our existing electrical systems nowadays. In this work the estimation and mitigation of voltage sag, voltage swell, voltage fluctuation and reactive power limiting for different loading condition in utility by using Custom Power Devices. The D- STATCOM has taken as a compensating device, since it known for its flexibleness, easy implementation, dynamic load compensation & multifunctional operation. The model of D-STATCOM connected in shunt with a three-phase source feeding a constant and a variable load, which is develop using Simulink. The Simulated result demonstrates that D-STATCOM can consider as a feasible solution for solving voltage dip, swell and fluctuation problems. 3. PROPOSED WORK Power Quality problems will be improved by modeling and simulation of RSC-MLC based D-STATCOM using PV power. The Advantages of this work will be Reactive power will be compensated, switching losses of convertor will be reduce, Total harmonic distortion will be reduces. The proposed method also provides real power to load in peak demand. The Propose model as shown in fig-2. Fig-2: Proposed model RSC-MLC BASE SMART PV-DSTATCOM Journal | 3219
- 4. International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 p-ISSN: 2395-0072Volume: 07 Issue: 03 | March 2020 www.irjet.net ©2020 IRJET | Impact Factor value: 7.34 | ISO 9001:2008 Certified CONCLUSION D-STATCOM is a best device to improve power quality problem in distribution system among all power devices. D-STATCOM using real switch count multi level convertor to which solar power is given as input. Due to this technique switching losses will be reduce as well as reactive power is compensated and total harmonic distortion will be reduces. Also real power is provided in case of emergency by using solar power during peak demand. REFERENCES [1] Sandeep Prajapati,Shivani Johri, "Power Quality Improvement using D-Statcom," International Journal of Emerging Technologies and Innovative Research,ISSN:2349-5162,Vol1,Issue 5,page no pp371-379,October 2014 [2] Sabha raj Arya,’’Power Quality Enhancement using DSTATCOM in Distributed Power Generation System”IEEE Transactions on Industry Application (Volume: 52, Issue 6, Nov-Dec.2016) [3] Noramin Ismail, Wan Norainin Wan Abdullah, "Enhancement of Power Quality in Distribution System Using D- STATCOM, " The 4th International Power Engineering and Optimization Conference (PEOCO2010), Shah Alam, Selangor, MALAYSIA. 23- 24 June 2010. [4] Rodda Shobha Rani, B. Jyothi, "VSC Based DSTATCOM & Pulse-width modulation for Power Quality Improvement," International Journal of Engineering Trends and Technology- Vol. 2, pp 38-41, 2011. [5] N.Ravendra1, V.Madhusudhan2, A.Jaya Laxmi3 “Modeling and Simulation of DSTATCOM for Power Quality Enhancement in Distribution System” International Journal of Advanced Research in Electrical, Electronics and Instrumentation Engineering, Vol. 5, Issue 6, June 2016. [6] Prabhir Ranjan Kasari ; Nanish Paul “Analysis of D-STATCOM for power quality enhancement in distributed network” TENCON 2017-2017 IEEE Region 10 Conference,Penang,2017,pp. 1421-1426 [7] Divya Nair ;Megha Raveendran “Mitigation of power Quality issues using D-STATCOM’’2012 International Conference on Emerging Trends’ in Electrical Engineering and Energy Management ,Chennai 2012,pp65-69 [8] S.R.Arya , B. Singh “Power Quality Enhancement using DSTATCOM in Distributed Power Generation System,” 2014 IEEE International Conference on Power Electronics , Drives and Energy system(PEDES),Mumbai,2014,pp 1-6 Journal | 3220