1) The document discusses a proposed effective power transfer scheme for a grid-connected hybrid wind and photovoltaic system. It aims to minimize the number of converters used and directly ties the PV array to the dc link. 2) The literature review covers past research on hybrid renewable energy systems including a PV-FC system that uses MPPT, a hybrid wind/micro-hydro system with supercapacitor energy storage, and a hybrid AC/DC microgrid with coordination control algorithms. 3) The proposed method uses an SDM controller and STATCOM to compensate for current unbalance from non-linear loads while transferring power from both wind and solar sources to the grid through a single GSC converter. Simulation results

1. 11/21/2017 1
Government College Of Technology
Coimbatore-13
Effective power transfer scheme for a grid
connected hybrid wind & photovoltaic
system
16PSEE01 – PROJECT PHASE I
Guided By By
Dr. K. Baskaran G.ranjithkumar
Asso Professor, EEE Reg no:1673113

2. LITERATURE REVIEW
S:NO: TITLE AUTHOR TRANSACTION INFERENCE
1 Power-Management
Strategies for a Grid-
Connected PV-FC Hybrid
System
Loc Nguyen Khanh,
Student Member, IEEE,
Jae-Jin Seo, Yun-Seong
Kim, and Dong-Jun Won,
Member, IEEE
IEEE
TRANSACTIONS
ON POWER
DELIVERY, VOL.
25, NO. 3, JULY
2010
The PV array normally
uses a maximum power
point tracking technique to
continuously deliver the
highest power to the load
when variations in
irradiation and temp at
uncontrollable source.
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3. LITERATURE REVIEW
3 Study of a grid-connected
hybrid wind/micro- hydro
power system associated
with a supercapacitor
energy storage device
Stefan BREBAN
,Benoît ROBYNS ,
Mircea M.
RADULESCU
2010, 12th International
Conference on
Optimization of
Electrical and Electronic
Equipment, OPTIM 2010
The variable-speed hydro
power plant together with
SCESD allows
compensating and
smoothing the fluctuating
solar power when
connected to the grid.
4 A Hybrid AC/DC Microgrid
and Its Coordination
Control
Xiong Liu, Peng
Wang, and Poh
Chiang Loh,
IEEE TRANSACTIONS ON
SMART GRID, VOL. 2,
NO. 2, JUNE 2011
The coordination control
algorithms for smooth
power transfer between a
dc links and for stable
system operation under
various generation and load
conditions.
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4. Objective
• Minimize the number of converter.
• PV array is directly tied to the dc link.
• GSC track the maximum power from wind and solar.
• STATCOM, compensate for the power unbalance due to
connection of unbalanced load at the grid.
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5. Existing Method
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6. Existing Method
• Number of converters are used to regulate the Pv and wind
generation
• When non linear loads are connected in DG side, the current
unbalance is not considered.
• There is no VAR support to the non linear load.
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7. Proposed Method
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WIND GRID
SOLAR
SDMPI CONTROLAR
WSC
LOAD
GSC

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9. PI Controller
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10. Case 1: Both Wind And PV Generating Power
• The solar MPPT continuously tracks the maximum panel voltage
value which is set as the reference voltage Vpv_ref for the WSC.
• The output DC voltage of WSC is regulated to Vpv_ref using a PI
controller.
• The reference currents for WSC are generated using SDM.
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11. Simulation Result for GSC
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12. Simulation Result Wind and Pv
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13. Case 2: Only PMSG Generating Power
• MPPT algorithm becomes ineffective in generating Vpv_ref.
• In such a case, the voltage controller regulatesthe DC-link
voltage to 230 V.
• The power from the PMSG is transferred to the AC loads and
grid by GSC.
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14. Simulation Result
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15. Case 3:Only PV generating power.
• Absence of wind power.
• The PV power is directly fed to the DC link providing a
variable link DC voltage.
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16. Simulation Result
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17. Case 4 :STATCOM Operation
• A STATCOM providing VAR support to non-linear loads
connected to the grid.
• In the absence of renewable power, the non-linear loads
connected to the GSC are powered by the grid and the GSC
serves as a shunt active power filter to compensate for the
current unbalance.
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18. STATCOM Operation
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19. Simulation Result
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20. REFERENCES:
• Li, S., Haskew, T.A., Swatloski, R.P., et al.: ‘Optimal and direct-
current vector control of direct-driven PMSG wind turbines’, IEEE
Trans. Power Electron., 2012, 27, (5), pp. 2325–2337
• Bae,s.,kwasinski,A.: ‘Dynamic modeling and operation staregy for a
microgrid with wind and photovoltaic resaurces’,IEEE trans.smart
grid 2012,3,(4),pp.1867-1876.
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21. THANK U….
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