1
Energy System
Energy System
THESIS
THESIS
Khoa Đin-Đin T2002 – 2007.
SOLAR ENERGY IN DISTRIBUTED
SOLAR ENERGY IN DISTRIBUTED
GENERATION AND GRID
GENERATION AND GRID-
-CONNECTED
CONNECTED
PROBLEM
PROBLEM
Instructor:
Instructor: Prof. Assoc.
Prof. Assoc. Nguyen Huu Phuc
Nguyen Huu Phuc
Student: Vo Nguyen Qui Tu
Student: Vo Nguyen Qui Tu
CHƯƠNG TRÌNH ĐÀO TO K SƯ CHT LƯNG CAO VIT-PHÁP PFIEV CHƯƠNG TRÌNH ĐÀO TO K SƯ CHT LƯỢNG CAO VIT-PHÁP PFIEV
Main parts
Main parts
Solar Energy
1
Control single-phase inverter
2
TMS320F2812 DSP
3
Conclusions and Future Works
5
Experimental results
4
CHƯƠNG TRÌNH ĐÀO TO K SƯ CHT LƯNG CAO VIT-PHÁP PFIEV CHƯƠNG TRÌNH ĐÀO TO K SƯ CHT LƯỢNG CAO VIT-PHÁP PFIEV
Khoa Đin-Đin T2002 – 2007.
2
CHƯƠNG TRÌNH ĐÀO TO K SƯ CHT LƯNG CAO VIT-PHÁP PFIEV CHƯƠNG TRÌNH ĐÀO TO K SƯ CHT LƯỢNG CAO VIT-PHÁP PFIEV
Khoa Đin-Đin T2002 – 2007.
1
Solar Energy
How solar cell work
How solar cell work
Ntypesilicon
Ptypesilicon
+++++++++++++++
‐‐ ‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐
+
PNjunction
()
(+) DCcurrent
+ +
CHƯƠNG TRÌNH ĐÀO TO K SƯ CHT LƯNG CAO VIT-PHÁP PFIEV CHƯƠNG TRÌNH ĐÀO TO K SƯ CHT LƯỢNG CAO VIT-PHÁP PFIEV
Khoa Đin-Đin T2002 – 2007.
3
Characteristics of a solar cell
Characteristics of a solar cell
22
sc
I 20mA cm 40mA cm≈→
V0.6V0.7V
oc =→
(
)
mpp mpp
V,I
CHƯƠNG TRÌNH ĐÀO TO K SƯ CHT LƯNG CAO VIT-PHÁP PFIEV CHƯƠNG TRÌNH ĐÀO TO K SƯ CHT LƯỢNG CAO VIT-PHÁP PFIEV
Khoa Đin-Đin T2002 – 2007.
: Maximum Power Point
: Maximum Power Point
Short
Short-
-circuit current
circuit current
PV light
PV light-
-to
to-
-electricity efficiency:10% to 15%
electricity efficiency:10% to 15%
(I-V) and (P-V) characteristics for a solar cell
Open circuit voltage
Open circuit voltage
Effects of temperature and insolation
Effects of temperature and insolation
levels on silicons solar cell
levels on silicons solar cell
CHƯƠNG TRÌNH ĐÀO TO K SƯ CHT LƯNG CAO VIT-PHÁP PFIEV CHƯƠNG TRÌNH ĐÀO TO K SƯ CHT LƯỢNG CAO VIT-PHÁP PFIEV
Khoa Đin-Đin T2002 – 2007.
4
Definitions
Definitions
One silicon solar cell produces 0.5 volt
One silicon solar cell produces 0.5 volt
CHƯƠNG TRÌNH ĐÀO TO K SƯ CHT LƯNG CAO VIT-PHÁP PFIEV CHƯƠNG TRÌNH ĐÀO TO K SƯ CHT LƯỢNG CAO VIT-PHÁP PFIEV
Khoa Đin-Đin T2002 – 2007.
36 cell connected together have enough voltage to charge 12
36 cell connected together have enough voltage to charge 12
volt batteries and runs pump and motors
volt batteries and runs pump and motors
Can connect modules togethers to get any power configuration
Can connect modules togethers to get any power configuration
Photovoltaic cells, modules, panels and arrays.
Grid
Grid-
-connected PV system
connected PV system
Operate in parallel with and interconnected with the
Operate in parallel with and interconnected with the
electric utility grid
electric utility grid
Power Conditioner Unit/ inverter
Power Conditioner Unit/ inverter
Converts the DC power produced by the PV array into AC power consistent with
the voltage and power quality requirements of the utility grid
Automatically stops supplying power to the grid when the utility grid is not
energized
CHƯƠNG TRÌNH ĐÀO TO K SƯ CHT LƯNG CAO VIT-PHÁP PFIEV CHƯƠNG TRÌNH ĐÀO TO K SƯ CHT LƯỢNG CAO VIT-PHÁP PFIEV
Khoa Đin-Đin T2002 – 2007.
Diagram of grid-connected photovoltaic system.
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Grid
Grid-
-connected PV system
connected PV system
A bi
A bi-
-directional interface is made between the PV system AC
directional interface is made between the PV system AC
output circuits and the electric utility network
output circuits and the electric utility network
Either supply on-site electrical loads, or to back-feed the grid when the PV system
output is greater than the on-site load demand
When the electrical loads are greater than the PV system output, the loads is
received from the electric utility
CHƯƠNG TRÌNH ĐÀO TO K SƯ CHT LƯNG CAO VIT-PHÁP PFIEV CHƯƠNG TRÌNH ĐÀO TO K SƯ CHT LƯỢNG CAO VIT-PHÁP PFIEV
Khoa Đin-Đin T2002 – 2007.
Stand
Stand-
-alone PV system
alone PV system
Operate independent of the electric utility grid
Operate independent of the electric utility grid
designed and sized to supply certain DC and/or AC electrical
designed and sized to supply certain DC and/or AC electrical
loads
loads
CHƯƠNG TRÌNH ĐÀO TO K SƯ CHT LƯNG CAO VIT-PHÁP PFIEV CHƯƠNG TRÌNH ĐÀO TO K SƯ CHT LƯỢNG CAO VIT-PHÁP PFIEV
Khoa Đin-Đin T2002 – 2007.
Direct-coupled PV system.
Diagram of stand-alone PV system with
battery storage powering DC and AC loads.