Mid-term exam of PhD

1. 博士中期汇报
DOCTORAL MID-TERM REPORT
汇报人：Ibrahim Al-wesabi（易傲松）
导师：方支剑教授
2022年12月02日

2. 1 Doctoral project
2
Published Papers
3
Papers in progress
4
CONTENTS School Requirements

3. 背景
3
Topic
RQ
Doctoral project
What
are the standalone photovoltaic battery system (SPVBS)?
are the advantages and disadvantages of using SPVBS?
How
can eliminating the Challenges of using SPVBS?
Are there any differences between the previous studies and current study
of solving the problems in SPVBS?
Hybrid SSA-PSO Based DSMC for Extracting
Maximum Photovoltaic Output Power and Regulating
the DC-Bus Voltage with a small capacitor in SPVBS

4. 背景
4
Model
Doctoral project
General
structure

5. 背景
5
Model
Doctoral project
 Problems of the DC-Bus voltage cause through using a small capacitor
Figure 2. Single-phase two-stage PV Power
conditioning unit with DC-link capacitor
Fig. 2. PV array voltage (Vpv) with 120 Hz ripple and PV
power (Ppv)with oscillations
1. Instability of DC-bus voltage
2. Low frequency voltage ripples
3. System’s dynamic performance problem

6. 背景
6
DC-bus
voltage Although the previous studies are successful in reducing the
DC-bus voltage ripples and instability in SPVBS. However,
they still have some drawbacks such as; oscillations and
unacceptable dynamic performance.
Small
DC-bus
Capacitor
In order to reduce this ripple, large electrolytic capacitors which have
short lifetimes are often used at the DC bus. To increase the lifetime of
SPVBS, it is necessary to replace electrolytic capacitors with small film
capacitors which have long lives and low capacitance.
Doctoral project (What has already been done?)
Based on the results of previous studies, the smallest DC-bus capacitor used in
SPVBS was 20-µF.

7. 背景
7
Model Work to develop a model for designing SPVBS for Extracting
Maximum Photovoltaic Output Power and Regulating the DC-
Bus Voltage with a small capacitor by using some meta-
heuristics algorithms such SSA, PSO, GWO, CSA or some
hybrid methods
Topics
The Hybrid SSA-PSO Based DSMC topic is being
prepared.
Doctoral project (Currently, what am I doing?)

8. 背景
8
Model
Doctoral project (Currently, what am I doing?)
PV generator 1 BES
DC
Load
= =
PV generator 2
PV generator 3
IPV1
IPV2
IPV3
= =
= =
= =
VPV1
VPV2
VPV3
IPV1_DC
IPV2_DC
IPV3_DC
cmd-1
cmd-2
cmd-3
cmd-4 cmd-5
VB
IB_DC IB
CDC
IDC
VDC
ILoad ILoad_DC
=
AC
Load
BDC
Inverter
ILoad_AC
cmd-6
DC-Bus
capacitor

9. 背景
9
Results
Doctoral project (Currently, what am I doing?)
A
B
C

10. 背景
10
Drawbacks
Techniques
The optimizations techniques will be used.
Doctoral project (What will I do in the coming period?)
achievements
The project achievements will be prepared.
The drawbacks of using small film DC-bus capacitor in
SPVBS will be solved and eliminated.

11. 1 Doctoral project
2
Published Papers
3
Papers in progress
4
CONTENTS School Requirements

12. 背景
12
Courses
Credits
I have done and completed all my
courses and get the enough credits
Conferen
ces
I have done one conference in
our departments and still two will
complete them as soon as
possible
School Requirements

13. 1 Doctoral project
2
Published Papers
3
Papers in progress
4
CONTENTS School Requirements

14. 背景
14
1
Title: Maximum power extraction and DC-Bus voltage regulation in grid-connected PV/BES
system using modified incremental inductance with a novel inverter control.
Journal: The Scientific Report Journal
Status: Published (SCI.T2. 2022).
2
Published Papers
Title: A review of Yemen’s current energy situation, challenges, strategies, and prospects for
using renewable energy systems.
Journal: Environmental Science and Pollution Research
Status: Published (SCI.T2. 2022).
3
Title: Cuckoo Search Combined with PID Controller for Maximum Power Extraction of
Partially Shaded Photovoltaic System.
Journal: Energies
Status: Published (SCI.T2. 2022).

15. 背景
15
4
Title: Direct sliding mode control for dynamic instabilities in DC-link voltage of standalone
photovoltaic systems with a small capacitor.
Journal: Electronics
Status: Published (SCI.T3. 2022).
5
Published Papers
Title: Comparative Study of Solar PV System Performance under Partial Shaded Condition
Utilizing Different Control Approaches.
Journal: Indian Journal of Science and Technology
Status: Published (SCI.T4. 2021).
6
Title: PV maximum power-point tracking using modified particle swarm optimization under
partial shading conditions.
Journal: Chinese Journal of Electrical Engineering
Status: Published (Ei.2020).

16. 1 Doctoral project
2
Published Papers
3
Papers in progress
4
CONTENTS School Requirements

17. 背景
17
1 Title: Dynamic Global Power Extraction of Partially Shaded PV
System Using a Hybrid PSO-PID with Anti-windup Strategy
Journal: Applied Soft Computing Journal
Status: Under review (SCI.T1. 2022).
2
Title: Hybrid SSA-PSO Based DSMC for Extracting
Maximum Photovoltaic Output Power and Regulating the
DC-Bus Voltage
Journal: IEEE Journal of Emerging and Selected Topics in
Power Electronics
Status: In progress (SCI.T1. 2022).
Papers in progress

18. Thank you