Fluctuating photovoltaic (PV) output power reduces the reliability in power system when there is ... more Fluctuating photovoltaic (PV) output power reduces the reliability in power system when there is a massive penetration of PV generators. Energy storage systems that are connected to the PV generators using bidirectional isolated dc-dc converter can be utilized for compensating the fluctuating PV power. This paper presents a grid connected energy storage system based on a 2 kW full-bridge bidirectional isolated dc-dc converter and a PWM converter for PV output power leveling. This paper proposes two controllers: a current controller using the d-q synchronous reference and a phase-shift controller. The main function of the current controller is to regulate the voltage at the high-side dc, so that the voltage ratio of the high-voltage side (HVS) with low-voltage side (LVS) is equal to the transformer turns ratio. The phase-shift controller is employed to manage the charging and discharging modes of the battery based on PV output power and battery voltage. With the proposed system, unity power factor and efficient active power injection are achieved. The feasibility of the proposed control system is investigated using Simulink simulation.
Unlike above-water communications developments, which have brought us instantaneous cell phone co... more Unlike above-water communications developments, which have brought us instantaneous cell phone conversations, wireless Internet and myriad other advances, underwater communications lags behind. There are wide ranges of physical processes that impact underwater communications and the relative importance of these processes are different in different environments. In this paper we have shown an alternative way to communicate underwater using a sub-atomic particle known as Neutrino. It also describes some issues with neutrino communication and some suggestions are given. Its high penetration properties, half integer spin, neutrino oscillation has enhanced the possibilities for deep sea communications. Oscillation probabilities, neutrino detection, Cherenkov radiation, pulse position modulation (PPM) are all briefly discussed.
Fluctuating photovoltaic (PV) output power reduces the reliability in power system when there is ... more Fluctuating photovoltaic (PV) output power reduces the reliability in power system when there is a massive penetration of PV generators. Energy storage systems that are connected to the PV generators using bidirectional isolated dc-dc converter can be utilized for compensating the fluctuating PV power. This paper presents a grid connected energy storage system based on a 2 kW full-bridge bidirectional isolated dc-dc converter and a PWM converter for PV output power leveling. This paper proposes two controllers: a current controller using the d-q synchronous reference and a phase-shift controller. The main function of the current controller is to regulate the voltage at the high-side dc, so that the voltage ratio of the high-voltage side (HVS) with low-voltage side (LVS) is equal to the transformer turns ratio. The phase-shift controller is employed to manage the charging and discharging modes of the battery based on PV output power and battery voltage. With the proposed system, unity power factor and efficient active power injection are achieved. The feasibility of the proposed control system is investigated using Simulink simulation.
Unlike above-water communications developments, which have brought us instantaneous cell phone co... more Unlike above-water communications developments, which have brought us instantaneous cell phone conversations, wireless Internet and myriad other advances, underwater communications lags behind. There are wide ranges of physical processes that impact underwater communications and the relative importance of these processes are different in different environments. In this paper we have shown an alternative way to communicate underwater using a sub-atomic particle known as Neutrino. It also describes some issues with neutrino communication and some suggestions are given. Its high penetration properties, half integer spin, neutrino oscillation has enhanced the possibilities for deep sea communications. Oscillation probabilities, neutrino detection, Cherenkov radiation, pulse position modulation (PPM) are all briefly discussed.
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Papers by Ishmeet Bajwa