The paper proposes a novel self-reference voltage pre-regulator for LED driver chip. The system modeling of the self-reference voltage pre-regulator is established, which is composed of pre-regulator circuit and reference voltage generating circuit. The reference voltage generating circuit generates a reference voltage, in which the circuit returns the reference voltage as the reference voltage...

Purpose. This article proposes a new strategy for Direct Power Control (DPC) based on the use of Artificial Neural Networks (ANN-DPC). The proposed ANN-DPC scheme is replacement PI and hysteresis regulators by neural regulators. Simulation results 1 kW system are provided to demonstrate efficiency robustness control during variations in active reactive power DC bus voltage. Methodology. Our dir...

in this study, a new approach for control (treatment) of aids based on patient entry drug. one of the main problems related to aids, is lack of control, lack of identification and early treatment of this disease. today physicians more than anything, control the disease relying on their experience and knowledge and time-consuming and complex experiments, nevertheless, human errors are inevitable...

This paper is based on the EL mathematical model of the MMC synchronous rotating coordinate system, derived the MMC passive control law, the inner ring current passive controller is designed and the AC voltage controller is set. In order to restrain the negative sequence current caused by the network voltage unbalance or asymmetric AC system fault, the positive and negative sequence of independ...

Full power rating three-level neutral-point clamped (3L-NPC) back-to-back power converters seem promising for wind turbine systems with high power. Direct Model Predictive Control (DMPC) is an attractive technique, in particular, for multi-level converters. Voltage sensorless control makes the voltage measurements obsolete. This work proposes and verifies an Initial Bias Compensation based Virt...

This paper describes a DC isolated network which is fed with Distributed Generation (DG) from photovoltaic (PV) renewable sources for supplying unbalanced AC loads. The battery energy storage bank has been connected to the DC network via DC/DC converter to control the voltage of the network and optimize the operation of the PV generation units. The PV arrays are connected to the DC network ...

To restore the load voltage, dynamic voltage restorer (DVR), which installed between the supply and a sensitive load, should inject voltage and active power from DVR to the distribution system during voltage sag. Due to the limit of energy storage capacity of DC link, it is necessary the minimize energy injection from DVR. In this paper the techniques of the supply voltage sag compensation in a...

In models with large additional dimensions, the GUT scale can be lowered to values accessible by future colliders. Due to modification of the loop corrections from particles propagating into the extra dimensions, the logarithmic running of the couplings of the Standard Model is turned into a power law. These loop-correction are divergent and the standard way to achieve finiteness is the introdu...