VENIGALLA SANDEEP

****E, Orange St, #* ab0ys4@r.postjobfree.com

Tempe, Az-85281 516-***-****

Education

Master of Science in Engineering, Electrical Engineering, Arizona State University (Aug 2011-May 2013) CGPA: 3.3/4

Bachelor of Technology, Electrical Engineering, Vellore Institute of Technology (Aug 2007-May 2011) CGPA: 7.6/10

Relevant Coursework

Power System Devices & Analysis, Power Transmission and Distribution, Power Operations and Planning, Advanced Power

Electronics, Power Systems Transients, Switchgear and Protection, Renewable Electric Energy Systems (Grid Integration using

Power Electronics), Electric Machines and Drives, Manufacturing Science of Solar cells and Solar Energy.

Software Skills

• Simulation Tools : ETAP, PLECS, PSCAD, Powerworld, PSpice, SCADA, Simulink, PSS/E, AutoCad.

• Software :C,C++,JAVA.

• Operating System : Mac Os x, Windows, Unix/Linux.

Academic Projects

Modeling of a 500kV transmission line

• Designed a 500kV transmission line by calculating the required clearances, routing, selection of transmission towers,

conductors and insulators.

• Assessed the shielding failure and the back flashover for the lightening protection, line regulation, and optimized

capacitor placement of a distribution feeder at maximum and minimum load conditions.

• Cost analysis and scheduling was done for this transmission line.

Power system protection design with different relay schemes for 230kV loop system

• Modeled 230kV inter looped Arizona transmission system in PowerWorld simulator and measured the fault currents at

various buses of the system for relay coordination.

• A protection scheme comprising time-over-current relays, distance relays and differential relays was designed, simulated

and tested with the help of PowerWorld simulation tool.

Analysis of transients in a power transmission system

• Modeled the transmission system in PSCAD and analyzed transients due to the peak current chopping of the circuit

breaker and switching transient over voltages. Assessed suitable pre-insertion resistance to reduce the over voltages.

• Maximum Transient Recovery Voltage across the circuit breaker is calculated at the load end of the line for a 0.9 power

factor load.

Design and simulation validation of all components of a grid connected PV invertor system

• Implemented Perturb and Observe based Maximum Power Tracking DC-DC isolated boost converter for the PV system.

• Designed a DC link controller to maintain constant voltage at the DC link capacitor.

• A three phase PWM inverter along with a Phase Lock Loop (PLL) controller and a Current Controller are also

designed to interconnect the DC system to the grid with a LC filter to limit the THD at 2%.

• The model is validated for varying irradiance, temperature and the grid power factor.

Transmission adequacy of a six bus and three-generator system

• Checked the system for N-1 line outage compliance (contingency analysis). Calculated the maximum PV generation that

can be accommodated while the system still remains N-1 compliant according to NERC standards.

• Analysis was done considering the estimated levels of PV generation that are expected in future in Arizona. Evaluated

the effect of transmission expansion on the improvement in PV generation within N-1 compliance.

Dynamic modeling of a doubly fed induction motor (wind turbine) to the grid

• Designed Doubly Fed Induction generator (DFIG) in both abc and dq reference frames and studied its dynamic and

steady state analysis.

• The designed DFIG model is interconnected to the grid using Rotor Side Convertor (RSC) and Grid Side Convertor

(GSC) along with their controllers for back-to-back AC/DC/AC conversion.

The entire model is dynamically analyzed for varying wind speeds (6,8 and 12m/s).

•

Power electronic interfaces for Ultra capacitor applications in Electric Vehicles

• Designed a Power Electronics interface model for an Electrical Vehicle, which takes DC power (unregulated) from the

Battery (DC Power Source) and regulates it by using a DC-DC converter and then converts it into 3-phase AC power by

using an Inverter.

• The performance of different configurations in which the ultra capacitor and DC-Power source are interfaced, was

analyzed.

Optimizing the production line up of Silicon Solar cell

• Designed engineering experiment for improving the output and efficiency of Silicon Solar Cell manufacturing sequence,

using Virtual Manufacturing Execution System software (VMES) developed by Jeffrey Cotter, manufacturing

Technology Director, Sun Power Corp Sep, 2011.

Work Experience

Student Intern-National Thermal Power Co-operation of India Jan 2011-May 2011

• Surveyed the working and functioning of the coal handling plant, boiler, air pre-heater and condenser.

• Worked at NTPC substation and surveyed transformer maintenance, switchyard equipment such as Relays, Current

Transformer, Potential Transformer, SF6 Circuit Breaker and Grounding, Excitation systems and Governor Controls.

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