THREE PHASE THREE LEVEL DISTRIBUTION statcom INTREGATED WITH SOLARPPT.pptx

JITESH KUMAR SAHU
(0192EE19MT12)
Under the Guidance of
Devendra Sharma
Department of Electrical & Electronics Engineering
1
Technocrats Institute of Technology & Science, Bhopal (M.P.)
Affiliated to Rajiv Gandhi Proudyogiki Vishwavidyalaya, Bhopal
Session-2019-2021
Three Phase Three-Level Distribution STATCOM
Integrated with Solar

 Introduction
 Literature Survey
 Problem Statement
 Proposed Work
 Results & Discussion
 Conclusion
 Future Scope
 List of Abbreviation
 Publications
 References
LIST OF CONTENT

 Modern Power System (MDS) is tassel of versatile load
comprises of high frequency power electronic devices and
distributed generation connected using power electronic
converters.
 All these devices draw Non-Linear Current (NLC) form the
system. The NLC distort the source profile and injects
harmonic in voltage and current waveforms.
 Due to the harmonics, waveforms deviate from sinusoidal
shape to non-sinusoidal one. This phenomenon degrades the
Power Quality (PQ) of the system.
 One of the promising technology which is extensively used in
MDS is Static Compensator (STATCOM).
INTRODUCTION

 Static compensator (STATCOM) is a shunt compensation
installed to eliminate harmonics generated by non-linear and
unbalanced loading condition.
 In this work three phase three-level based Distribution
STATCOM (DSTATCOM) is designed to eliminate harmonics
and to mitigate PQ issues generated due to harmonics.
 Also, the designed DSTATCOM is capable of integrating solar
power with the AC utility system.
 Hence PV-DSTATCOM supplies active as well as reactive
power demand of the system.
INTRODUCTION

LITERATURE SURVEY
Author publication Work
Phsan M. Siavashi IEEE
Transactions on
Sustainable
Energy ·
February 2018
This paper presents a novel smart inverter PV-
STATCOM in which a photovoltaic inverter can be
controlled as a dynamic reactive power
compensator—STATCOM. The proposed PV-
STATCOM can be utilized to provide voltage control
during critical system needs on a 24/7 basis. In the
night-time, the entire inverter capacity is utilized for
STATCOM operation.
Wesam Rohouma,
Robert S. Balog, Aaqib
Ahmad Peerzada,
Miroslav M. Begovic
Renewable
Energy 2020
This article investigates the use of a capacitor-less
distribution static synchronous compensator (D-
STATCOM) for power quality compensation in
modern distribution systems. The proposed topology
is based on a matrix converter (MC), controlled by
finite control set model predictive control (FCS-MPC)
which makes possible the use of inductive energy
storage rather than electrolytic capacitors, which
have been proven to be the most failure-prone
components in a power electronic circuit.

LITERATURE SURVEY
Pradeep
Kumar,
Niranjan
Kumar,
A.K.Akell
a
2013 AASRI Conference on
Parallel and Distributed
Computing and Systems
In this paper, three different system topologies for
Distribution Static Compensators (DSTATCOMs)
are modeled and tested using
Simulink’SimPowerSystem Toolbox for power
system quality studies. Simulation tests on a
distribution system, equipped with the unbalanced
and non-linear load. With the different system
topologies of Distribution Static Compensators
(DSTATCOMs) it is observed that power factor can
be improved in supply system.
Om Prakash
Mahela,
Abdul
Gafoor
Shaik
Renewable and Sustainable
Energy Reviews
This paper presents a comprehensive review of the
distribution static compensator employed for
harmonic filtering, power factor correction, neutral
current compensation, and load balancing in the
distribution network.

LITERATURE SURVEY
Sharad
S.Pawar,
A.P.
Deshpande
International Conference on
Energy Systems and
Applications (ICESA 2015)
In this paper, three different system topologies for
Distribution Static Compensators (DSTATCOMs)
are modeled and tested using
Simulink’SimPowerSystem Toolbox for power
system quality studies. Simulation tests on a
distribution system, equipped with the unbalanced
and non-linear load. With the different system
topologies of Distribution Static Compensators
(DSTATCOMs) it is observed that power factor can
be improved in supply system.
B. Singh R.
Saha A.
Chandra
K. Al-
Haddad
IET Power Electronics 2008 A comprehensive review on the STATCOM
technology and its development are carried out in
this paper.

 The smart inverters can perform multiple functions involving both reactive and real
power control in addition to their main task of converting DC power to AC power
i.e.; inverting solar power.
 These functions include voltage regulation, power factor control, active power
controls, ramp-rate controls, fault ride through, and frequency control, etc.
 Similar concept for STATCOM can be used for grid integration of solar power as
well as active and reactive power control.
 During a critical system disturbance the real power generation function of PV solar
farm is autonomously discontinued for a brief period, and the entire inverter
capacity is released to provide dynamically modulated reactive power for grid
support.
 In conventional STATCOM, the power requirement of converter circuit is supplied
by DC-battery. To which put additional burden on the system.
PROBLEM STATEMENT

 In this research work simulation and modeling of DSTATCM is presented
for the compensating reactive power demanded by non-linear and
unbalanced load.
 A concept of utilizing PV solar farms as STATCOM during for providing
different grid support functions is presented.
 In this work the Photovoltaic (PV) generated DC power is utilized to charge
the battery of DSTATCOM. Hence STATCOM here provide duple
application of providing PQ compensation as well as integrating PV with
the utility system as PV-DSTATCOM. PV here operates in two modes;
 1) Supplying active power to the load.
 2) Supplying reactive power for providing PQ compensation.
 Simulation results in MATLAB are presented to corroborate the
effectiveness of the approach.
PROPOSED WORK

 The D-STATCOM is a PEC which provides reactive power compensation. It
is shunt-connected near load bus.
 The main building of the configuration of DSTATCOM is three-phase VSI
[3]. VSI consist of three arms for three phase having 6 switches as shown in
Fig. 1.
 It injects required current IINJ to compensate for harmonic load current in such a way
so as the source draws sinusoidal current.
 The VDC is the DC voltage across the DC side of VSI which is supplied by DC-link-
capacitor.
 In the proposed work, this capacitor is charged through PV power as shown in Fig.
2.
 This serves two purposed; one reduces the dependency on Non-Renewable Sources
(NRS) and another is compensating for the harmonic currents generated due to non-
linear and reactive loading [6].
Photo-Voltaic fed Distribution Static
Compensator (PV-DSTATCOM)

D-STATCOM
Fig.1 Schematic diagram of D-STATCOM

PV-DSTATCOM
Fig.2 Schematic diagram of PV-DSTATCOM
Passive
Filter
VSI
PV
Source
Control
Unit
VPCC
VDC D-STATCOM
VC
Load
ZL
VL
ZLINE
VS
Source
S1
S2 S3
By-pass Switches
Shunt
connected

CONTROL OF PV-D-STATCOM
Fig.3 Schematic diagram for the control of converters
Isa
Isb
Isc
Vsa
Vsb
Vsc
abc
To
dq0
PWM
PLL
dq0
To
abc
+
+ +
Va
Vb
Vc
Vdc
Id
CosƟ
SinƟ
LPF
PI
V*dc
PI
-
+
PI
VLd
VLq
-
+
+
+
Iq
To converter

SIMULATION MODEL
Fig.4 Simulation model of PV-DSTATCOM

DESIGN PARAMETERS
Table 1 Design parameters
PARAMETER Values selected
Voltage, RMS (L-L) 415 V
Source impedance 1.58mH
Frequency 50 Hz
PV rating 60 KW
PV DC voltage 600 V
Filter inductance Lf 310mH
Filter resistance Rf 0.1Ω
Filter capacitor Cf 500 uF
Three phase rectifier resistor RNLL 125 Ω
Coupling capacitance 4500 µF
PI gains 0.04, 500
Linear load 1MW
Non-linear load 8KW
Variable load 1 KW, 20 KVAR
inductive

Solar output power and voltage
Fig.5 PV power and voltage

Output Voltage and current for the
proposed system with Linear loading
Fig.6 Output voltage current with PV-DSTATCOM for linear loading both at grid as well as load side

Sinusoidal voltage and current waveform
for linear loading
Fig.7 Zoomed view of voltage and current for linear loading both at grid as well as load side

THD of voltage for linear loading
Fig.8 THD of voltage for linear loading

Output Current THD for linear loading
Fig. 9 THD of current for linear loading

Load Voltage and current for the proposed
system with non-linear loading
Fig.10 voltage and current at load side

THD of load voltage for non-linear loading
Fig.11 THD for load voltage

THD of load current with non-linear loading
Fig.12 Load current THD

Voltage and current Grid side for non-linear loading
with PV-DSTATCOM
Fig.13 Voltage and current both at grid side for non-linear loading with PV-D-STATCOM

THD of voltage grid side
Fig.14 THD of voltage for non-linear loading with PV-D-STATCOM

THD of current grid side
Fig. 15 THD of current for non-linear loading with PV-D-STATCOM

THD analysis of output voltage of the
proposed system at PCC
Fig.18 THD analysis of the voltage at PCC

THD analysis of output current of the
proposed system at PCC
Figure 19 THD analysis of the current at PCC

 When PV-D-STATCOM is connected into the system, it eliminates the
harmonics of voltage and current at source side and source draws the
sinusoidal parameters with low THD .
 It also reduces the load current as well as load voltage harmonics to 25 %
and 0.5% respectively, under the condition of non-linear loading. Which is
28% for load current without STATCOM.
 For better understanding of working of PV-D-STATCOM, pre and post
connection waveforms of voltage is compared. The DSTATCOM supplies
the required compensation current to mitigate the source and load
harmonics.
 PV supplies the required reactive power to mitigate the PQ issues
generated due to non-linear loading.
Result Discussion

Parameter Previous work (2018) Proposed work
System voltage 120 Vrms 415 Vrms
PV rating 6KW 60KW
Load profile Variable load (active and
reactive)
Non-linear load and
variable load
Power factor 0.94 0.99
Power Quality
measurement
Not presented THD analysis and
harmonics are as per the
grid code requirement
Result Comparison

 The MDS is heavily burdened with PE based loads such as stabilizer
based refrigerator and air-conditioner, variable speed motors, solid state
LEDs, sensitive hospital equipments etc. DSTATCOM is on high use in
the system to mitigate PQ issues generated due to these loads.
 In this paper, the PV-D-STATCOM is designed using conventional
three phase three-level VSI. The VSI is controlled using SRF method
which enables instantaneous control of the active and reactive power.
 alleviate the harmonic at the source, also preventing the propagation of
undesirable harmonics further into the system which may hinder the
operation of other equipments connected in the network.
 PV plays power is supplied to the load as well as it charges the battery of
STATCOM to provide desire compensation. At the time when solar irradiation
is not available, it behaves as a classic STATCOM only required reactive power
demand to mitigate various PQ issues.
CONCLUSION

 The high penetration of PV in the distribution system require extensive
survey regarding its operation under abnormal system operation of faults.
 The system may also be analysed for fault ride through capability.
 The backbone of both APF and PV inverters is the voltage source inverter
(VSI), with electrolytic capacitors. These capacitors are subjected to
accelerated failures, especially in hot/arid environments and are attributed to
30% of the failures that occur in power electronics.
 the use of a capacitor-less distribution static synchronous compensator (D-
STATCOM) for harmonic and reactive power compensation in a distribution
network can also be investigated.
Future Scope

 [1] Jitesh kumar sahu, Devendra Sharma “Technical Review of
Static Compensator in Modern Distribution System”, International
Journal of Advancees in Engineering and Management (IJAEM)
ISSN: 2395-5252, Volume-3 Issue-9, 2021. pp.985-991
 [2] Jitesh kumar sahu, Devendra Sharma, “ Three Phase
Distribution STATCOM Integrated with Solar”, - Communicated in
6th IEEE International Students' Conference on Electrical,
Electronics and Computer Sciences.
 [3] Jitesh kumar sahu, Devendra Sharma, ”Three Phase Three
Level Distribution STATCOM Integrated with Solar” , -
International Journal OF Science & Research, ISSN:2319-7064,
Paper ID.-SR21909175749, Volume-10 Issue 9, sept. 2021.
LIST of PUBLICATIONS

[1] Varma, R. K., & Siavashi, E. M. (2018). PV-STATCOM: A new smart inverter for voltage
control in distribution systems. IEEE Transactions on Sustainable Energy, 9(4), 1681-1691.
[2] Rohouma, Wesam, et al. ‘D-STATCOM for harmonic mitigation in low voltage distribution
network with high penetration of nonlinear loads.’ Renewable Energy 145 (2020): 1449-1464.
[3] Kumar, P., Kumar, N., & Akella, A. K. (2013). Modeling and simulation of different system
topologies for DSTATCOM. Aasri Procedia, 5, 249-261.
[4] Mahela, O. P., & Shaik, A. G. (2015). A review of distribution static compensator. Renewable
and Sustainable Energy Reviews, 50, 531-546.
[5] Pawar, S. S., Deshpande, A. P., & Murali, M. (2015). Modelling and simulation of DSTATCOM
for power quality improvement in distribution system using MATLAB SIMULINK tool. In
2015 International Conference on Energy Systems and Applications (pp. 224-227). IEEE.
[6] Singh, B., Saha, R., Chandra, A., & Al-Haddad, K. (2009). Static synchronous compensators
(STATCOM): a review. IET Power Electronics, 2(4), 297-324.
[7] Iyer S, Ghosh A, Joshi A., ‘Inverter topologies for {DSTATCOM} applications—a simulation
study’. Electr Power Syst Res 2005;75(23):161–70.
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