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This paper presents a static comprehensive optimization study and analysis of the high altitude wind power (HAWP) generating system based on the medium voltage AC (MV-AC) transmission. The analytical expressions for weight and cost of the transmission line, the mechanical structures (turbine + frame), the generator, and the blimp/aerostat are derived as functions of output power rating and altitude...
A modular multilevel converter (MMC) with traditional cascaded PI control structure suffers from poor steady state and dynamic performance. This is due to the limited harmonic rejection capability of PI controller thus failing to alleviate even order harmonics in circulating current and due to the slower outer average voltage control loop resulting in significant deviation in submodule capacitor voltages...
This paper presents an algorithm for determining fault section on Modular Multilevel Converter (MMC) based hybrid High Voltage DC (HVDC) transmission system. The hybrid transmission system consists of an overhead line followed by a subsea cable for deep-water oil and gas processing. The algorithm is based upon independent analysis of post fault characteristic signals at each terminal. These characteristic...
In a modular multilevel converter (MMC), ripple component in the capacitor voltages of the submodules(SMs) results in second- and other even-order harmonics in the circulating currents. When, MMC is used for variable frequency applications like a front end converter in variable speed wind generator or as an inverter in a motor drive, the circulating current harmonic frequencies varies over a wide...
With the depletion of existing oil and gas reserves, there is an increasing demand for deep-water oil and gas production, which requires long distance power transmission and distribution to several subsea electrical loads. Subsea cables (power umbilicals) are one of the key components in subsea power transmission. Modelling of subsea cables is important to study their transient and steady-state behaviour...
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