ELEC 7313: Renewable Energy Integration - OpenDSS & Matlab Simulation

This report presents an OpenDSS-Matlab simulation for a simple power system with and without PV integration, analyzing the impact on voltage profiles and SVR tap operations. The simulation involves loading data, simulating in OpenDSS, and plotting three-phase voltage and tap positions over time. The analysis includes scenarios with PV supplying active power and drawing reactive power, revealing variations in tap positions and voltage profiles. The conclusion highlights key observations such as reliability concerns, power quality issues, voltage variations, reverse power flow, system frequency destabilization, and the need for improved protection schemes in distribution systems with high penetration of renewable energy sources. The report references several research papers related to antenna performance and MIMO communication systems.

RENEWABLE ENERGY
Name:
Professor:
Date:

TASK ONE
TASK DESCRIPTION
We are required to simulate the opendss-matlab simulation for the simple power system given in
this assignment. The first step we took was to download the load data and the PV data. These
were stored as an m-file. We then wrote a matlab code that accept this data and simulates the
data in opendss before plotting the three phase voltage and tap position with time. The matlab
code file is attached to this assignment.
RESULTS:
0 500 1000 1500
time
0.935
0.94
0.945
0.95
0.955
0.96
0.965
0.97
0.975
SVR tap operation profile
SVR tap operation profile with time
Figure 1: SVR tap operation profile with PV not connected to the power system
max_voltage =

0.9576
min_voltage =
0.9000
0 500 1000 1500
time
0.9
0.91
0.92
0.93
0.94
0.95
0.96
SVR tap operation profile
SVR tap operation profile with time
Figure 2: Voltage profile at node 4 when PV is not connected to the power system

0 500 1000 1500
Time
1200
1400
1600
1800
2000
2200
2400
2600
2800
Active load demand
Active load demand against time
Figure 3:Load demand with time
DISCUSSION:
From the plots it can be observed that the voltage profile and SVR tap operation profile is
constant throughout. This is because the PV is not connected to the power system hence
maintaining the profiles will not require tap position changing.
TASK TWO
In this task we are required to repeat the steps in task one with PV added to the power system.
The PV supplies active power only. We repeated the steps in task one. The output three phase
voltages were then plotted against time. We plotted the transformer tap position also with time.
RESULTS:

0 500 1000 1500
time
0.972
0.974
0.976
0.978
0.98
0.982
0.984
0.986
0.988
0.99
0.992
SVR tap operation profile
SVR tap operation profile with time
Figure 4: SVR tap operation profile with PV connected to the power system supplying active
power

0 500 1000 1500
Time
0.972
0.974
0.976
0.978
0.98
0.982
0.984
0.986
0.988
0.99
0.992
voltage profile at node 4 bandwidth 1.01
voltage profile at node 4 bandwidth 1.01 against time
Figure 5: Voltage profile with the Pv connected to the power system with time
max_voltage =
0.9911
min_voltage =
0.9732

0 500 1000 1500
Time
-400
-200
0
200
400
600
800
Active load demand
Active load demand against time with PV added supplying active power
Figure 6: Active power demanded by the load
0 500 1000 1500
Time
0
200
400
600
800
1000
1200
Active PV power generation
Active PV power generation with time
Figure 7: Active power supply with time by the PV

DISCUSSION:
From the plots it can be observed there is variation in the tap position with time as load varies
and also the PV connected to the power system while supplying active power.
TASK THREE
TASK DESCRIPTION:
We were required to repeat steps in task one and two the PV drawing reactive power from the
power system. We performed the opendss-matlab simulation and plotted the three phase voltages
and tap position.
RESULTS:

0 500 1000 1500
time
0.955
0.96
0.965
0.97
0.975
0.98
0.985
0.99
SVR tap operation profile
SVR tap operation profile with time
Figure 8: SVR tap operation profile with PV connected to the power system supplying active
power and drawing reactive power

0 500 1000 1500
Time
0.955
0.96
0.965
0.97
0.975
0.98
0.985
0.99
voltage profile at node 4 bandwidth 1.01
voltage profile at node 4 bandwidth 1.01 against time
Figure 9: Voltage profile with the Pv connected to the power system with time while drawing
reactive power

0 500 1000 1500
Time
-400
-200
0
200
400
600
800
Active load demand
Active load demand against time with PV added supplying active power
Figure 10: Active power demanded by the load
0 500 1000 1500
Time
0
200
400
600
800
1000
1200
Active PV power generation
Active PV power generation with time
Figure 11 Active power supply with time by the PV

DISCUSSION:
The observations are similar to those obtained in task two however there is high adjustment rate
of the tap position in order to maintain a flat voltage profile as a result of the PV drawing
reactive power from the system.
CONCLUSION:
These are observations from the lab exercise:
i. Reliability: the quantity of power generated by renewable energy cradle founded
Petascale Virtual Data Grids is not unfailing comparable to wind and solar cradle.
Therefore, the extraordinary diffusion of Petascale Virtual Data Grids into network
can decline the consistency of the power system grid.
ii. Power eminence: the high diffusion of Petascale Virtual Data Grids can cause more
vocal transmission into the power system grid, intensifies the damages, and perhaps
decline the apparatus lifespan.
iii. Voltage variation: it is an important matter for high diffusion level of Petascale
Virtual Data Grid. This subject needs to be analytically well thought-out
incorporating varying cradles. For instance, the variation of solar cradle in providing
power to the load will lead to overvoltage or under voltage. The voltage variation is
very corrupt influence on the sensitive apparatus.
iv. Reverse power flow: integrating Petascale Virtual Data Grid in the structure leads to
faults of shield methods as they are designed by the unidirectional system.
v. System frequency: destabilizes flanked by supply and demand will consequence to
the abnormalities from the structure insignificant frequency. The high diffusion of