<span>This paper presents the control for Shunt Active Power (SAPF) filter in photovoltaic (PV) systems connected to the grid. The proposed configuration of the system consists of a photovoltaic array that connected to the grid through the three-phase inverter topology that also serves as an active filter. Photovoltaic is coupled in parallel with the direct curret (DC) side of the active filter. With this configuration, can be obtained three advantages, namely the elimination of harmonic currents caused by nonlinear load, reactive power injection, and injection of active power generated photovoltaic. The p-q Theory is used to calculate the harmonic reference current to be used to control the active filter coupled fotovoltaic in generating anti-harmonic currents. The results show that system can reduce harmonic distortion from THD </span><span>27.22% </span><span>to be THD 1.05%, whereas when the active power from photovoltaic injected, the THD become 2.01%. Power sharing can also be seen from this study.</span>
<span>This paper proposes a control strategy active power filter under non-ideal main voltages. The P-Q Theory is used to generate three-phase active power filter reference currents, but the P-Q Theory has a weakness when implemented under non ideal main voltages. This paper proposes a reference current generation method using modified P-Q Theory under non-ideal main voltages conditions. Before calculating the P-Q Theory, the non-ideal voltage at the source is normalized by using PLL to determine the phase angle which is then carried out by generating an ideal three-phase signal. The proposed method is simulated and implemented in a three-phase active power filter controller. The test results show the improvement in the performance of the P-Q Theory under non ideal main voltages with THD 7.21% to THD 3.29%.</span>
The high crime rate of motor vehicle theft in urban areas requires additional safety systems installed in our vehicles. The following paper presents an embedded system for vehicle safety. A simple safety with double layer activation ensures the vehicle cannot be turned on by a burglar even though it has damaged the ignition. Utilizing a combination of the drive by touching module and the arduino uno microcontroller, the security system works automatically when the ignition is off. To activate the vehicle, it requires activation of the touch of the hand at a secret point, so that the CKP signal will be sent to the vehicle ECU. At the same time, touch activation continues the 7V voltage as a power microcontroller. Next it is necessary to pair the Bluetooth signal HC-05 module with the vehicle owner’s cellphone using the boarduino application. Commands from the cell phone in the form of signals received by the Bluetooth module, will be forwarded to the control unit to activate the actuator so that the vehicle can be turned on. The safety system that was proposed after being designed, built, and tested gave good results as expected.
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