Abstract
The utilization of hydrokinetic energy as renewable energy is an effort in meeting the increasing demand for energy. The development of vertical axis hydrokinetic turbine straight blade cascaded (VAHT-SBC) at previous research has successfully extract energy with high-performance coefficients. However, the developed VAHT-SBC has not yet been integrated with generators as a power system generator. This research was conducted experimentally on an open channel, including an integrated system designed using VAHT-SBC and Permanent Magnet Synchronous Generator (PMSG) with a belt-pulley mechanism. The result shows the proportional relation of generator rotational speed to voltage and frequency. On the contrary, the generated voltage experience drop due to the loading in the integration system. The value of the voltage and frequency of inverter is not affected by rotational speed and load. The resulting inverter voltage has a value of 230 V and a frequency of 56 Hz. The installation of the integration system on hydrokinetic turbines prototype with the current velocity of 0.82 m s–1 and 0.92 m s–1 could produce 50 W of power.
Highlights
Hydrokinetic energy has become one of the renewable energies which extract kinetic energy from the water current
The turbine type used in this system is a vertical axis hydrokinetic turbine with a straight blade cascaded (VAHT-Straight Blade Cascaded (SBC)) because this has a fairly good performance coefficient [4]
Vertical axis hydrokinetic turbine - straight blade cascaded used is capable of producing efficiency of 37.9 % at site C
Summary
Hydrokinetic energy has become one of the renewable energies which extract kinetic energy from the water current. The hydrokinetic turbine is one of the hydrokinetic utilization [1], which is adapted from wind turbines due to its similar mechanism in power generation [2]. This technology could operate at low freestream velocity and is independent of the incoming flow direction. There are two types of hydrokinetic turbine based on its axis, i.e., Horizontal Axis Turbine and Vertical Axis Turbine [3]. The self-starting mechanism has the best performance at the angle of attack of -10
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