Results 11 to 20 of about 1,003,464 (309)
A Modified Differential Coherent Bit Synchronization Algorithm for BeiDou Weak Signals with Large Frequency Deviation. [PDF]
Sensors (Basel), 2017 BeiDou system navigation messages are modulated with a secondary NH (Neumann-Hoffman) code of 1 kbps, where frequent bit transitions limit the coherent integration time to 1 millisecond.
Han Z, Liu J, Li R, Zeng Q, Wang Y.
europepmc +2 more sources
Majlesi Journal of Electrical Engineering, 2023 Load frequency control is an important factor of supplying quality electricity in an interconnected power system. As a result, an optimally tuned Proportional-Integral-Derivative (PID) controller is proposed in this work to eliminate frequency errors ...
Narender Saini, Jyoti Ohri
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Российский технологический журнал, 2016 The article deals with the distortion of high-frequency acoustic pulses with linear frequency modulation (LFM) in a hydroacoustic communication channel, which is caused by uneven frequency attenuation characteristics of the marine environment.
V. E. Denisov
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New Synthetic Inertia Control for Wind Energy Conversion System
IEEE Access, 2023 Participation of modern variable-speed wind turbine generators in system frequency support has gained much attention from various transmission system operators to increase renewable technology hosting capacity in their power networks.
Sherif Fathallah +3 more
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Applied Sciences, 2019 Through the feedback of the rotor speed and/or the grid frequency, an energy storage system (ESS) can effectively suppress the electromechanical oscillation of a power system.
Bo Yang +5 more
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Genotypic frequency, allelic-frequency and deviation from Hardy Weinberg of the different mutations.
, 2023 Genotypic frequency, allelic-frequency and deviation from Hardy Weinberg of the different mutations.
Mohamed Ragab (11655257) +4 more
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An Improved Droop Control Strategy Based on Changeable Reference in Low-Voltage Microgrids
Energies, 2017 This paper proposes an improved droop control strategy based on changeable reference in low-voltage microgrids. To restore running frequency of distributed generation to a rated value without affecting its reactive power output, changeable frequency ...
Chunxia Dou +3 more
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Adaptive PI + VPI Harmonic Current Compensation Strategy under Weak Grid Conditions
Applied Sciences, 2023 With the increase of the penetration rate of renewable energy power generation in the power system, the power grid gradually tends to be weak. Under the scenario of nonlinear load connecting to weak power grid, the grid-side voltage will produce ...
Lili Zhou, Wei Han, Jia Qi, Zhen Zhou
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Robust optical injection locking to a 250 MHz frequency comb without narrow-band optical pre-filtering [PDF]
, 2011 A semiconductor laser was injection locked to a single optical frequency comb mode with a dither-free phase locked loop.
Wu, D.S. +7 more
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Fault direction identification for wind power integration system
The Journal of Engineering, 2019 Traditional directional relays of AC transmission lines are usually based on 50 Hz information in frequency domain in China. However, this conventional approach cannot provide the correct fault direction for the lines connected to wind farm because of ...
Yu Chen +5 more
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