Power optimizer

About: Power optimizer is a research topic. Over the lifetime, 10525 publications have been published within this topic receiving 199245 citations.

Power Characteristics of Jiuquan Wind Power Base

Abstract: Jiuquan Wind Power Base (JQWPB) is the first 10 GW-level pilot wind power base in the world, whose construction is the first successful attempt to exploit wind energy in large scale and far away from the load center. By using the gauged wind resources data and the recent energy management system (EMS) operating data from the dispatching department, an analysis is made of the characteristics of wind power resources, and investigations are performed on the power characteristics of wind turbine generator, wind farm, wind farm cluster and the entire JQWPB. By comparing the wind power characteristics in different time scales, it has been found that the output power of the JQWPB has clear relevance to long time scale and is obviously complementary for short time scale. Also treated is the effect of wind power characteristics on power grid stability, peak load regulation and frequency control.

Single chip solution for solar-based systems

Abstract: In one embodiment there is provided a power management system for managing the power from solar panels and rechargeable batteries to power a system that includes DC loads and AC loads. The power management system includes a DC-DC converter in communication with the solar panels, a first switch positioned to control power from the DC-DC converter, to and from the rechargeable batteries, and to the DC loads and AC loads, and when in response to a power requirement from the system being equal to or less than a solar panel power provided by the solar panels, the first switch automatically set, by the power management system, to supply the system with only the solar panel power, and wherein any excess solar panel power not consumed by the system is at the same time automatically directed to recharge the rechargeable battery.

Maximum Power Point Tracking in Grid Connected Wind Plant by Using Intelligent Controller and Switched Reluctance Generator

Abstract: This paper presents intelligent controllers as a maximum power point tracking system for a switched reluctance generator (SRG) driven by a variable speed wind turbine to attain the maximum power. The intelligent controller systems are artificial neural network (ANN) controller and fuzzy logic (FL) controller. Both controllers manipulate the wind turbine rotational speed by changing turn-off angle of the SRG. The turn on angle is fixed. The wind plant is connected to the grid through a DC–AC inverter system and two step up power transformers. The systems are simulated in MATLAB/ Simulink environment. The results show that the ANN controller is more accurate and efficient than the FL controller.

Power control design for variable-speed wind turbines

Abstract: This paper considers power generation control in variable-speed variable-pitch horizontal-axis wind turbines operating at high wind speeds. A dynamic chattering torque control and a proportional integral (PI) pitch control strategy are proposed and validated using the National Renewable Energy Laboratory wind turbine simulator FAST (Fatigue, Aerodynamics, Structures, and Turbulence) code. Validation results show that the proposed controllers are effective for power regulation and demonstrate high-performances for all other state variables (turbine and generator rotational speeds; and smooth and adequate evolution of the control variables) for turbulent wind conditions. To highlight the improvements of the provided method, the proposed controllers are compared to relevant previously published studies.

A new control strategy of variable speed wind turbine generator for three-phase grid-connected applications

Abstract: This paper discusses a new control scheme of a three-phase grid-connected wind energy conversion system (WECS). The control incorporates a maximum power point tracker (MPPT) for optimal use of the wind resource. In addition, reactive power compensation of the electric grid is included, operating simultaneously and independently of the active power generation. The wind turbine generator (WTG) consists of a variable speed wind turbine and the MPPT is implemented via a DC-DC boost converter. A three-level voltage source inverter (VSI) is used as interface with the AC power grid. Validation of models and control schemes is performed by using the MATLAB/Simulink environment. Moreover, a 400 W WECS experimental set-up was used to demonstrate the effectiveness of the MPPT algorithm proposed.