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Search results for: frequency
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Year: 2021, Volume: 21, Number: 4
... wind power related technical summary for the following hybrid forecasting scheme: First, high frequency denoising of four categories: based on physical information, mining wind power sequence ... intelligent algorithms, and combined models. At present, prediction performance, and improving time-frequency aggregation. Then use the long short-term memory model most physical modeling methods are ...
Year: 2021, Volume: 21, Number: 3
... the study, first, a clustering method (K-Means) used. Support Vector Machine (SVM), Naive Bayes (NB) was used to reduce the frequency of anomaly. Then, the data and J48 algorithms were used as the methods and obtained from the cluster, rule extraction from the decision comparative analysis results ...
Year: 2021, Volume: 21, Number: 3
... , because of higher efficiency and power density. Such systems achieve these using Medium Frequency Transformers (MFT) in the converter modules as galvanic separation. State of ... is more suitable for inverters for the Japan-Tokyo 1.5 kV DC metro in 2015, high-frequency applications in the MHz range. resulting in a 30% reduction in energy ...
Year: 2021, Volume: 21, Number: 3
... designing tools mainly MOSFET is activated by a Sinusoidal Pulse Width employed in mechanic and mechatronic systems, their use in Modulation (SPWM) strategy, in which switching frequency the nonlinear observer design for a grid-tied single-stage PV is denoted as fs. The passive elements sizing and the system system is shown in this work. Also ...
Year: 2021, Volume: 21, Number: 3
... o s R (6) G (s)  d L 2 LCs  s  (1 ï€ D) 2 R The boost converter nominal switching frequency is considered as 20 kHz. The PI controller parameters Kp= 0.252 and Ki= 0.63 is calculated from Bode diagram by using phase and Gain margins. ...
Year: 2021, Volume: 21, Number: 3
... has already been chosen as the candidate centre. extracted. Sub-steps of Step B can be listed as follows. The Select one new coordinate at random as a frequency values of the coordinates reduced in this step are new centre, using a sorted in an array data structure in descending order; The weighted probability distribution where ...
Year: 2021, Volume: 21, Number: 3
... in the proposed with the improved DC offset compensation estimated frequency and phase angle values, which needs to parameter ... vol. 16, pp. 310-318, 2016. frequency-locked loop suitable for DC-offset rejection in single-phase doi: ... /JPE.2016.16.1.310 systems," Electric Power Systems Research, vol. 170, pp. 348-357, [8 ...
Year: 2021, Volume: 21, Number: 3
... ] 1.55 1.14 0.58 Perceptron) [1-2] composed of an input and an output layer, that is developed for image classification task. 2.0 7 1.5 6 Frequency of occurrence [%] 1.0 k=1 k= 1.18 5 0.5 SQNR [dB] 4 0.0 3 -0.5 -1.0 2 -1.5 1 -2.0 0 -30 ...
Year: 2021, Volume: 21, Number: 2
... db8) to models is summarized in the range of 4.1ms to 7.91ms detect voltage sag/swell with and without positive/negative under different conditions. The sampling frequency was phase jumps. The performance of this method with respect 6.66kHz. This technique was also used in a benchmark to accuracy and detection time is better than ...
Year: 2021, Volume: 21, Number: 2
... 30]. 76 Advances in Electrical and Computer Engineering Volume 21, Number 2, 2021 The joint ED optimization, with slow and fast timescale economic management. frequency regulation, is approaching the fast timescale sub- The ED problem determines the actual power output of problem using a distributed frequency control algorithm that each generating unit ...
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