Vinay Kumar Chandna

Design, development, and commissioning of a supervisory control and data acquisition (SCADA) laboratory for research and training

This paper reports a state-of-the-art Supervisory Control and Data Acquisition (SCADA) Laboratory facility for power systems at Jamia Millia Islamia, New Delhi, India. It has been designed to function as a research and training center for utilities, faculty members, and students. This paper covers the design, commissioning, and functioning of the SCADA/EMS laboratory facility, based on distributed-processing technology. The SCADA laboratory will provide hands on experience to students and practicing engineers and will give them an insight into the contemporary SCADA systems. This lab is the first of its kind to be functional in India.

Development of a Two Diode Model for Photovoltaic Modules Suitable for Use in Simulation Studies

In this paper, an improved two diode model of photovoltaic module is simulated using MATLAB/ Simulink. Only four parameters(V_oc, I_sc, V_m, I_m) are required to simulate the model. Accuracy of the model is validated by testing various modules of different types (Multi Crystalline, Mono Crystalline and Thin Film). The proposed model is found to be accurate when subjected to variation in temperature and solar irradiance. The values of various important parameters ie V_oc, I_sc, V_m and I_m obtained from current-voltage and power-voltage curves of the proposed model are almost similar as the values supplied by the manufacturer.

Fuzzy-genetic algorithm for pre-processing data at the RTU

Uncertainties are always present in the data captured at the remote terminal unit (RTU) in a power system. In this paper, it has been demonstrated that pre-processing the data with a fuzzy-genetic algorithm at the RTU will reduce the uncertainty and vagueness in the measurands. The initial population for the genetic algorithm is generated with assumed fuzzy functions. These functions are optimized using the theory of reproduction, cross over and mutation. The result shows that the fuzzy-genetic algorithm gives better results than the other methods available. It is also observed that the fuzzy-genetic algorithm is easy to apply to the output fuzzy solution rather than to the input fuzzy function.

Effect of Varying Topologies on the Performance of Broadband Over Power Line

The power-line channel is an alternative to broadband data communication. However, low-voltage power lines present a very harsh environment for high-frequency communication signals. The high-frequency signal undergoes attenuation due to line loss and impedance mismatch because of branches and loads. Also, the dynamics of system changes the topology of the network very frequently. In this paper, a typical broadband-over-power-line (BPL) system has been simulated based on the echo model of the power line. The effect of varying topologies on the performance of the BPL system has been investigated using different numbers of branches, load impedances, and line lengths. The simulation shows that with the increase in the number of branches, the bit error rate increases and poses very little effect on the bit-error rate due to the variation of load.

Intelligent algorithm for preprocessing multiple data at RTU

Uncertainties are always present in the power system data, captured at the remote terminal unit (RTU). Fuzzy logic method is one of the alternatives for improving the quality of such data, before processing it further. As the measured data deviates from their nominal values, preprocessing of them with fuzzy logic method improves the reliability of the measurements. This paper discusses a fuzzy logic-based algorithm for preprocessing the data at the RTU level. Measurands such as voltage, current, and phase angle have been employed to study the usefulness of the proposed method.

Effect of varying topologies on the performance of broadband over power line

Power line channel is an alternative to broadband data communication. However, LV power lines present a very harsh environment for high frequency communication signals. The high frequency signal undergoes attenuation due to line loss and impedance mismatch because of branches and loads. Also, the dynamics of system changes the topology of the network very frequently. In this paper, a typical BPL system has been simulated based on echo model of the power line. The effect of varying topologies on the performance of the BPL system has been investigated using different number of branches, load impedances and line lengths. The simulation shows that with the increase in number of branches, the bit error rate increases and poses very little effect on the bit error rate due to variation of load.

Simulation of single phase RMS controlled Voltage Source Inverter (VSI) for variation in Cdc, C s and R s

The paper present a MATLAB-SIMULINK model of a single phase 1.5 KVA RMS controlled VSI inverter using MOSFET. The paper describes the behavior of output voltage and current, the total harmonic distortion (THD), with the variation in input dc capacitor (Cdc), Snubber capacitor (Cs) and Snubber resistance (Rs) for linear and non-linear load. The values of Cdc, Rs and Cs as suggested by other authors in their papers are not clearly defined and it poses difficulty in selecting the proper value of the above-mentioned parameters. The simulation results show the variation in the output voltage and current with different values of the parameters for linear and non-linear load and suggest the selection of these parameters.

Innovation in the Design of RTU and Migration to IED

The power system operations (generation, distribution and transmission) need continuous monitoring and control to maintain reliable and uninterrupted power supply. Remote terminal unit (RTU) communicates measurands from different locations to central control room (CCR) for further processing and action. The success of the system operation depends upon the proper selection of the hardware and the software for the RTU. The paper describes the key features of the RTU and its design criteria. A typical relational database management system has also been designed for complete integration of the distribution system using SQL server and visual basic is used as front-end service, to present the information gathered to the higher hierarchy.

Course outcome assessment and improvement on weak student

Course outcome assessment is a pre-requisite for any programme to assess the performance of the student during the programme of study. Corrective actions are planned accordingly for the achievement of the same. The paper discusses the methodology for the assessment of course outcome of an individual student against pre-defined target. The assessment and analysis also provide the path to mobilize the different activities in the programme and serve as content beyond syllabus. Further, the cumulative assessments of the course outcomes are then used as one of the tool for the assessment of programme outcomes.

Broadband over power lines implementation roadmap for a smarter grid: A case study for Indian power sector

This paper makes an effort to present the major concerns with broadband over power lines technology and implementation roadmap for making the grid smarter. The paper also strives to emphasize upon the need to prepare ourselves for a timed roadmap for this technology which requires no new cabling or infrastructure, instead using the long established power grid provided by electrical companies. The authors have tried to gain attention of the readers, utilities, regulatories and all involved in power sector, IT sector and communication sector to look and analyse the potential of this technology for the future of smart grids. The objective of this paper is also to highlight on the technology in terms of its salient features, working, drawbacks, deployments and future challenges associated in the implementation plans. The suitability of BPL as a smart grid technology has been simulated and studied for an indoor feeder and the results are analyzed.