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2: Last 10,000 years [6].

2: Last 10,000 years [6].

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FIGURE 1.1: Full record of CO 2 measurements in Mauna Loa [5].
FIGURE 1.2: Last 10,000 years [6].
FIGURE 1.3: Last 800,000 years [7].
FIGURE 2.7: Dq0 PLL block. From [30].
+28 FIGURE 2.8: Direct Power Control. From [33].
Design, Modeling, and Simulation of a Bidirectional Three-Phase PWM AC/DC Converter
Thesis
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  • Apr 2019
With increased integration of renewable resources into the power distribution system, bidirectional ac/dc converters are gaining popularity in interfacing the utility grid and energy storage systems. This thesis presents design and modeling of a three-phase bidirectional PWM ac/dc converter with high power factor, low current THD, and high efficien...
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Context 1
... behave as a PWM rectifier to charge-up the capacitor to its final reference value. Right after the capacitor is at the reference voltage, the load can be connected to the system. Clearly, it is preferred to start up the system in stages. is achieved due to the addition of the expected angular speed reference of the grid to the output of the PI (Fig. 4.12). Both the standard and the DSOGI PLL synchronize equally at balanced conditions without distortions. ...

Citations

... In a single-stage PV system, because of inherent limitations of inverters [10], the dc-link voltage, V dc , should always be kept above a minimum voltage threshold, so operation on the right side of the MPP is necessary. ...
Maximum Power Reference Tracking Algorithm for Power Curtailment of Photovoltaic Systems
Preprint
  • Nov 2020
This paper presents an algorithm for power curtailment of photovoltaic (PV) systems under fast solar irradiance intermittency. Based on the Perturb and Observe (P&O) technique , the method contains an adaptive gain that is compensated in real-time to account for moments of lower power availability. In addition, an accumulator is added to the calculation of the step size to reduce the overshoot caused by large irradiance swings. A testbed of a three-phase single-stage, 500 kVA PV system is developed on the OPAL-RT eMEGAsim real-time simulator. Field irradiance data and a regulation signal from PJM (RTO) are used to compare the performance of the proposed method with other techniques found in the literature. Results indicate an operation with smaller overshoot, less dc-link voltage oscillations, and improved power reference tracking capability.
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... In a single-stage PV system, because of inherent limitations of inverters [10], the dc-link voltage, V dc , should always be kept above a minimum voltage threshold, so operation on the right side of the MPP is necessary. ...
Maximum Power Reference Tracking Algorithm for Power Curtailment of Photovoltaic Systems
Preprint
Full-text available
  • Nov 2020
This paper presents an algorithm for power curtail-ment of photovoltaic (PV) systems under fast solar irradiance intermittency. Based on the Perturb and Observe (P&O) technique, the method contains an adaptive gain that is compensated in real-time to account for moments of lower power availability. In addition, an accumulator is added to the calculation of the step size to reduce the overshoot caused by large irradiance swings. A testbed of a three-phase single-stage, 500 kVA PV system is developed on the OPAL-RT eMEGAsim real-time simulator. Field irradiance data and a regulation signal from PJM (RTO) are used to compare the performance of the proposed method with other techniques found in the literature. Results indicate an operation with smaller overshoot, less dc-link voltage oscillations, and improved power reference tracking capability.
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