Phase one of development of project relating to improvement of power quality by integrating a photo voltaic array to the grid.

1. Done by –
Manjunath R D 1BY13EE021
Nagesh L 1BY13EE025
Niteesh S Shanbog 1BY13EE026
Prashanth C 1BY13EE032
PV Integrated to Micro-grid
for Power Quality
Improvement
Guide –
Prashanth NA

2. Introduction
Growth of solar power production
 Non polluting
 Renewable Source
 Low Maintenance
 Used in remote areas

3. Problems encountered
 Integration of output of PV Cell with the grid

4.  Non Linear loads

5. Constraints
 Grid Code
 Voltage regulation
%VR=IVN-VFLI/IVFLI*100
Tolerance Value= 5%-10%
 Frequency Limit
For a 50Hz supply : 49.5Hz to 50.5Hz

6. So how do we solve it?
 Reducing the harmonics
By injecting the compensating current at the PCC(Point of
Common Coupling).
By supplying the harmonic and reactive power by an
active power filter.
 Power Equation:
Ps=Pa+Pr+Ph
Ps- instantaneous power
Pa- active fundamental power
Pr-reactive power
Ph- harmonic power

7.  Compensating current equation:
Total source current including losses is given as
i*
s = Isp sinωt
Isp - total peak current supplied by micro grid, where
Isp = Ip+ IsLoss
Ip - source current after compensation
IsLoss - losses occurred due to switching, conducting and
capacitor leakages.
So compensating current is given as
ic(t) = is - i*
s
is = instantaneous current

8.  After compensation:
- =
waveform of
compensating current

9. Overall configuration planned

10. What we’ve done so far?
 Design of Hardware
1. Three phase inverter
A Basic 3Phase inverter circuit using Mosfet
Switching device used: Power Mosfets with Vgs > 10V

11. Connections to the Inverter
 PWM Controller: 8051 Atmel AT89S52
The PWM controller generates pulses
corresponding
to the compensating current required.
PWM Controller
(5V)
MOSFET Driver
(5V)
Inverter (12v)

12. Block diagram of MOSFET drive
Buffer (5V) Isolator (5V) Drive (12V)
 Buffer used: Non inverting amplifier IC CD4050B
 Isolater used: Opto isolater IC 6N137
 Driving circuit: IC IR2101

13. Simulation
 A Basic 3 phase inverter was simulated using
MATLAB
under 180 deg conduction mode and the
following voltage waveform was obtained.


14. Literature Survey
 PV Source Integrated Micro-Grid for Power
Quality Improvement PRADEEP ANJANA1, VIKAS
GUPTA1, H.P. TIWARI1, NITIN GUPTA1 1Department of
Electrical Engineering, Malaviya National Institute
of Technology Jaipur, India
 Hasan Komurcugil ―Double-band hysteresis
current-controlled single phase shunt active filter
for switching frequency mitigation,‖ Electric
Power and Energy System, vol. 69, pp. 131-140,
July 2015.

15. What’s left to do?
 Design of closed loop current control system.
 Simulation of SAPF for power quality
improvement.
 Fabrication of hardware involving boost converter
and the three phase inverter.

16. Thank You!