Power optimizer

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

Photo-voltaic power converter with a simple maximum-power-point-tracker

Abstract: A simple power conditioner to convert the power available from solar panels for feeding into 60 Hz AC mains is described. The output from the solar panels will be converted into a regulated DC voltage using a boost converter and a large capacitor. The DC output will then be converted to 60 Hz AC using a bridge inverter. The ratio between the load current and the short-circuit current of a PV panel at maximum power point is nearly constant for different insolation (light) levels and this property is utilized in designing a simple maximum power point tracking (MPPT) controller. The results obtained on an experimental converter are presented.

Stability Analysis and Dynamic Performance Evaluation of a Power Electronics-Based DC Distribution System With Active Stabilizer

Abstract: The stability of dc microgrids is influenced by the nonlinear behavior of the converter-controlled loads with constant power characteristics. This nonlinear dynamic, in line with reduced size input filters used in the embedded power distribution of transportation systems, has a degrading effect on the dynamic performance and stability of the system. This paper presents the complete stability analysis of a dc distribution system composed of power electronics-based source and load. For this objective, a discrete-time dynamic model is developed and is applied to the studied system. Here, for the first time, the dynamic effect of the load controller is taken into the system model. In the studied system, the load converter is connected in cascade with the rest of the system, and is equipped with an input $LC$ filter, representing a common distributed architecture for the transportation applications. The controller of the source converter employs an active stabilizer to extend the stability margin of the system. This stabilizer uses high-pass-filtered voltage of the dc bus following with a proportional compensator. The dynamic behavior of the controller and the stabilizer is experimented through a series of laboratory tests. Different load dynamics are implemented to demonstrate the impact of slow and fast load dynamics on the stability of the system.

A modal analysis of a two-area system with significant wind power penetration

Abstract: This paper presents the results of an investigation aimed at ascertaining the effect that a sizeable wind farm exerts on the oscillation modes of a two-area, four-generator power system The modal characteristics of the system, when a wind farm replaces one of the generators, are analyzed

Damped-SOGI-Based Control Algorithm for Solar PV Power Generating System

Abstract: This paper deals with two-stage solar photovoltaic (PV) system with a damped-second-order generalized integrator (SOGI) algorithm. Proposed topology not only integrates the PV energy to the grid, in addition, it provides the load compensation, power factor correction, and harmonics elimination. Therefore, a double stage system is proposed where the first stage is a dc–dc boost converter, which performs the maximum power point tracking by regulating its duty ratio. For extracting maximum power from the PV array, an incremental conductance-based approach is utilized. Moreover, in the next stage, a voltage source converter (VSC) is utilized. To control the VSC, a damped-SOGI algorithm is used. By using a damped-SOGI-based control algorithm, fundamental active components of load currents are extracted for evaluating the reference grid currents. After comparing reference grid currents with sensed grid currents, switching pulses for the grid tied VSC are produced. A prototype of the proposed system is developed in the laboratory and test results are presented for verification of control of solar photovoltaic system.