College of Engineering, Pune

About: College of Engineering, Pune is a based out in . It is known for research contribution in the topics: Computer science & Sliding mode control. The organization has 4264 authors who have published 3492 publications receiving 19371 citations. The organization is also known as: COEP.

Multi-response design optimisation of convolution stresses of metal bellows using integrated PCA-GRA approach

Abstract: This paper presents the parametric design optimisation of the bellows multi-response convolution stresses using multiple attribute decision making (MADM) technique. Grey Relational Analysis (GRA) i...

Robust distance protection of mid-point shunt compensated transmission line

Abstract: Distance relays is exclusively used for the protection of HV and EHV line from last few decades. As a result of extensive research studies the distance relays have been upgraded to a distinct level. Introduction of synchronized measurement in power system has opened the new area of research in protection of transmission line. To enhance the power transfer capability of line the shunt Flexible AC Transmission System (FACTS) devices placed at midpoint are widely used nowadays. The use of shunt compensating devices like Static Var Compensator (SVC) and STATic synchronous COMpensator (STATCOM) have created many issues in distance protection of transmission line. This paper proposes the robust distance protection scheme utilizing the concept of synchronized measurement. The proposed scheme measures the impedance in two parts by utilizing the terminal information of the compensating device. Electro-magnetic Transient Program (EMTP) simulations on two machine system are used to establish the claims. The results prove the excellence of the proposed scheme.

Modelling, design and comparison of PI and PID controllers for Static Synchronous Compensator (STATCOM)

Abstract: The Static Synchronous Compensator (STATCOM) is one of the most widely used Flexible AC Transmission System (FACTS) device which is based on a voltage source converter with a dc link capacitor. This paper presents the mathematical modelling of STATCOM in dq domain, with the Q-V dc controller to control the reactive power flow in the system and to maintain the dc voltage at a constant value. The control of the voltage source converter(VSC) is achieved by controlling the duty cycle of the inverter devices in Park's domain (d d and d q ). Design, analysis and comparison of Proportional-Integral (PI) and Proportional-Integral-Derivative (PID) controllers for this scheme is presented.

Non-traditional Micromachining Processes: Opportunities and Challenges

Abstract: The high demand and stringent design requirements in developing fields of microengineering as well as various needs of society and nation require the utilization of suitable techniques of non-traditional machining processes on different existing and newly developed metals, non metals, alloys, polymers, ceramics, rubber and composites, etc. Presently, nontraditional machining techniques have expanded their applicability in the field of micromachining and offer better opportunities with several inherent advantages that make these processes superior as well as more efficient than conventional one. Non-traditional mechanical micromachining processes include abrasive jet machining (AJM), water jet machining (WJM), ultrasonic machining (USM), ion beam machining (IBM), etc. Non-traditional thermal micromachining processes include micromachining by electro discharge machining (EDM), laser beam machining (LBM), electron beam machining (EBM), etc. Non-traditional chemical and electrochemical micromachining processes have been used successfully to generate micro features of high quality. Hybrid micromachining can also be utilized effectively for generating more intricate shapes and complex parts. Advanced finishing processes using non-traditional machining like abrasive flow finishing (AFF), magnetic abrasive finishing (MAF), etc. are also gaining popularity to cope up the steep demand in finishing intricate, complex, durable and sophisticated shapes that are highly economical and posses better surface quality and property. The opportunities and challenges of each non-traditional micromachining and finishing processes are to be investigated considering various practical applications in different micro engineering fields. These non-traditional micromachining techniques as well as advanced finishing processes can be improved further and utilized more successfully in the near future for numerous microengineering applications.