Topic
Power optimizer
About: Power optimizer is a research topic. Over the lifetime, 10525 publications have been published within this topic receiving 199245 citations.
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TL;DR: In this article, the analysis and simulation of 15 kW wind turbine generator (WTG) driving low speed Permanent Magnet Synchronous Generator (PMSG) using PSIM computer simulation program.
Abstract: This paper elaborates on the analysis and simulation of 15 kW Wind Turbine Generator (WTG) driving low speed Permanent Magnet Synchronous Generator (PMSG) using PSIM computer simulation program. The system consists of wind turbine, permanent magnet generator, three-phase diode rectifier, boost converter, and voltage source inverter models. In the WTG model, the best performance coefficient has been determined according to the wind and rotational speed. The low speed PMSG has been used to eliminate gear- box to achieve high efficiency. The ac power output from PMSG is fed to a three-phase diode bridge forward by boost converter to effectively control the dc voltage level. The voltage source PWM inverter is used to interface the system with the electrical utility. The modulation index of the PWM inverter has been controlled to enhance the stability of the dc bus voltage. Simulation results show the superior stable control system and high efficiency. P , m T : mechanical power and torque production from wind turbine, respectively.
63 citations
TL;DR: In this paper, a wind turbine emulator (WTE) is presented, which is able to simulate the turbine power curves without using a closed loop control system, and it works in open loop and does not require the presence of a processor.
63 citations
TL;DR: A modified control algorithm, which has been developed to maintain the DC bus voltage at its reference through the regulation of the DC–DC bidirectional converter between the battery and DC bus, is presented.
63 citations
Patent•
07 May 2004TL;DR: A wind power generation evaluation system includes: a laser aerovane 100-300 that measures, with laser, the direction and velocity of wind at a distance from a wind power generator connected to an electric power system as discussed by the authors.
Abstract: A wind power generation evaluation system includes: a laser aerovane 100-300 that measures, with laser, the direction and velocity of wind at a distance from a wind power generator connected to an electric power system to predict the direction and velocity of wind at the wind power generator; a second aerovane 500 that measures them at the wind power generator; a wind power generation output calculation unit 400a that integrates a difference between power outputs calculated based on measurements by the laser aerovane and the second aerovane while referring to a windmill performance curve indicating output power characteristic of the wind power generator regarding wind velocity, to obtain a difference between the amounts of generated power; and an additional value calculation unit 400b that calculates additional value of an influence on the environment based on the difference between the amounts of generated power obtained by the calculation unit 400a.
63 citations
06 Mar 2014
TL;DR: Efficient DC-DC up-conversion at such low power levels (for battery charging) is extremely challenging and has not yet been demonstrated.
Abstract: Recent advances in low-power circuits have enabled mm-scale wireless systems [1] for wireless sensor networks and implantable devices, among other applications Energy harvesting is an attractive way to power such systems due to limited energy capacity of batteries at these form factors However, the same size limitation restricts the amount of harvested power, which can be as low as 10s of nW for mm-scale photovoltaic cells in indoor conditions Efficient DC-DC up-conversion at such low power levels (for battery charging) is extremely challenging and has not yet been demonstrated
63 citations