http://dspace.dtu.ac.in:8080/jspui/handle/123456789/79 2026-04-28T06:43:59Z 2026-04-28T06:43:59Z RAO, SHUBHAM SINGH http://dspace.dtu.ac.in:8080/jspui/handle/repository/22650 2026-02-10T04:47:20Z 2020-07-01T00:00:00Z

Title: ANALYSIS AND DESIGN OF A ZERO VOLTAGE TRANSITION DC-DC BOOST CONVERTER FOR PHOTOVOLTAIC (PV) ENERGY SYSTEM Authors: RAO, SHUBHAM SINGH Abstract: India despite being world’s third largest power and energy producer and consumer is considered to have and extremely undependable and fickle electrical infrastructure. It is believed that around 27% of the energy that is generated is either stolen or lost in transmission. When the 2012 grid failure happened, nothing happened to the villages that were not connected to the grid. Some instances include, Meerwada located in Madhya Pradesh because it has a 14KW solar power station.The reason why photovoltaic(PV) energy systems are gaining popularity is because of the systems that are being created and updated to obscure as much energy as it can from the sun that too in the most efficient way and contribute in humungous capacity without really affecting their performance. This thesis talks about the study of boost convertor operating all the switching devices under Zero Voltage Transmission and also a model convertor that can supply a load of 250W that is designed and is also used in a PV energy system. In this methodology, a part of the circuit resonates for a small portion of the switching cycle of the convertor, called as the auxiliary circuit that improves and betters the soft transition or change from ON to OFF state and vice versa, hence improving the convertor efficiency by reducing and lessening the dominating portion in losses i.e. the losses that happen because of difficult transition of the switches. Because of the lesser amount of losses during switching transitions, the heating effect of MOSFETs is also reduced and they have a more durable life. The relative and qualified study between this new methodology and traditional hard switching convertor is studied and analyzed with respect to improvement in efficiency and reduction in switching losses.

2020-07-01T00:00:00Z VERMA, ANEEH http://dspace.dtu.ac.in:8080/jspui/handle/repository/22647 2026-02-10T04:47:08Z 2025-12-01T00:00:00Z

Title: INVESTIGATION AND CONTROL ASPECTS OF SOME DC-DC CONVERTERS WITH EV INTEGRATION Authors: VERMA, ANEEH Abstract: As more and more people around the world use electric cars (EVs) as a more environmentally friendly way to get around, it becomes harder to keep the power grid stable. As more people start using electric vehicles (EVs), large-scale integration might cause problems with voltage drops, phase imbalances, and overloading in the grid infrastructure. In addition, changes in grid voltage and current might make EV charging operations less efficient and less reliable. This thesis suggests an intelligent bidirectional EV charging system that will help solve these problems while making sure that energy flows smoothly between the grid and EV batteries. The suggested system has two main converters: one that converts AC to DC on the grid side and one that converts DC to AC on the EV battery side. A second-order generalized integrator (SOGI)-based technique controls the AC-DC converter. This separates the basic current components from the harmonic distortions, making sure that the power flows in a sinusoidal way. The DC-DC converter uses a constant current charging algorithm to effectively control the battery's voltage and current while it is charging and discharging. These converters work together to create a strong way to transfer energy. They can switch between grid-to-vehicle (G2V) and vehicle-to-grid (V2G) modes while keeping the system stable even when the grid circumstances change. A lot of simulations with different situations, such as harmonics injection, load changes, and short-term disruptions, to see how well the system works. The results show that the SOGI-based control works well to stop distortions caused by the grid from spreading into charging and discharging currents. The technology also does a great job of regulating voltage, keeping the DC link constant even when the grid supply changes. The bidirectional DC-DC converter smoothly switches between buck and boost modes, making sure that power flows in both ways without harming the battery. The results of this study show that an enhanced EV charging architecture is possible and will improve the stability of the grid while also improving the performance of EV batteries.

2025-12-01T00:00:00Z SHARMA, SHUBHAM http://dspace.dtu.ac.in:8080/jspui/handle/repository/22496 2025-12-29T08:39:54Z 2025-05-01T00:00:00Z

Title: DESIGNING OF BATTERY CHARGER WITH TOTEM-POLE PFC AND PHASE-SHIFT FULL BRIDGE CONVERTER Authors: SHARMA, SHUBHAM Abstract: High reliability and efficiency are critical factors in the development of a battery charger. Therefore, battery charging systems must be designed to comply with grid standards and ensure safe operation. This research discusses the design of a charger that incorporates a Totem-Pole Power Factor Correction (PFC) and a Phase- Shift Full Bridge (PSFB) DC-DC converter. Implementing a power factor correction (PFC) converter will allow one to connect straight to the power grid for AC/DC power conversion and maximize the actual power going to the downstream DC/DC converters. The Phase-Shift full-bridge (PSFB) converter is a high-performance power supply with very fast transient response, given its high-power density and high converter efficiency. The devices are engineered to comply with Power Factor requirements and ensure isolation between the voltage source and the battery. The integration of PSFB provides these areas with galvanic isolation and efficient DC- DC conversion capabilities. A PSFB design built on the Modular Hardware-System- Common Redundant Power Supply (M-CRPS) base specification shows the ability of a PSFB converter. The integration of these topologies results in a charger design that is both compact and highly efficient. The device is capable of operating across a range of voltages while maintaining a stable output power suitable for battery charging. Simulation and experimental findings support and examine the power and efficiency aspects. This work assumes that battery chargers can be developed utilizing these systems. This research also addresses the challenges associated with charging technology by enhancing efficiency, reliability, and compliance with stringent regulations.

2025-05-01T00:00:00Z GAMI, ASHUTOSH KUMAR http://dspace.dtu.ac.in:8080/jspui/handle/repository/22495 2025-12-29T08:39:49Z 2025-05-01T00:00:00Z

Title: OPTIMIZED MPPT CONTROL OF PMSG BASED WECS WITH BOOST CONVERTER USING FUZZY SLIDING MODE CONTROL Authors: GAMI, ASHUTOSH KUMAR Abstract: This thesis presents the study of sophisticated control systems for Permanent Magnet Synchronous Generator (PMSG)-based Wind Energy Conversion Systems (WECS), emphasizing the enhancement of Maximum Power Point Tracking (MPPT) efficacy under fluctuating wind conditions. The system considered in this scholarly thesis consists of Wind Turbine, PMSG, rectifier. DC-DC Boost Converter. MPPT algorithm is used to maximize the output of wind turbine. This MPPT algorithm is used to control the boost converter based on Fuzzy logic control and adjusts the duty cycle of boost converter for optimal output from Wind Turbine. Traditional techniques like Perturb and Observe (P&O) and Sliding Mode Control (SMC) encounter significant constraints, including power fluctuations, losses due to chattering, and reliance on sensors. Traditional techniques, such as Perturb and Observe (P&O) and Sliding Mode Control (SMC), demonstrate significant shortcomings, including power fluctuation, noise losses, and dependence on sensors. This paper presents an innovative hybrid Fuzzy Sliding Mode Control (FSMC) design that combines the resilience of Sliding Mode Control (SMC) with the flexibility of fuzzy logic. The FSMC framework replaces the erratic switching function characteristic of traditional SMC with a 49-rule fuzzy inference system that alleviates fluctuations and diminishes switching losses. The control law changes the sliding surface S(t) dynamically. This allows precise MPPT operation without mechanical sensing (anemometers or tachometers), which cuts the cost of the system by 18–22%. This study is done on the MATLAB Simulink for the simulation and fuzzy logic designing of the PMSG based WECS system.

2025-05-01T00:00:00Z