Results 11 to 20 of about 1,976,011 (304)

Optimal Building Thermal Load Scheduling for Simultaneous Participation in Energy and Frequency Regulation Markets

open access: yesEnergies, 2021
This paper presents an optimal scheduling solution for building thermal loads that simultaneously participate in the wholesale energy and frequency regulation markets.
Jie Cai
doaj   +1 more source

A VSG-Based Coordinated DC Voltage Control for VSC-HVDC to Participate in Frequency Regulation

open access: yesEnergies, 2021
In this paper, a coordinated DC voltage control strategy is proposed based on the VSG (virtual synchronous generator) method for the VSC-HVDC transmission system to participate in the frequency regulation of the connected weak grid. The voltage and power
Tianwen Zheng   +5 more
doaj   +1 more source

Frequency-modulated nuclear localization bursts coordinate gene regulation [PDF]

open access: yes, 2008
In yeast, the transcription factor Crz1 is dephosphorylated and translocates into the nucleus in response to extracellular calcium. Here we show, using time-lapse microscopy, that Crz1 exhibits short bursts of nuclear localization (typically lasting 2 ...
Cai, Long   +2 more
core   +2 more sources

Frequency Regulation Strategy of Two-Area Microgrid System with Electric Vehicle Support Using Novel Fuzzy-Based Dual-Stage Controller and Modified Dragonfly Algorithm

open access: yesEnergies, 2023
Energy in microgrids (MGs) can now be generated from a variety of renewable sources, but their effective and sustainable use is dependent on electrical energy storage (EES) systems.
Balvender Singh   +3 more
doaj   +1 more source

Accurate Remaining Available Energy Estimation of LiFePO4 Battery in Dynamic Frequency Regulation for EVs with Thermal-Electric-Hysteresis Model

open access: yesEnergies, 2023
Renewable energy power generation systems such as photovoltaic and wind power have characteristics of intermittency and volatility, which can cause disturbances to the grid frequency.
Zhihang Zhang   +4 more
doaj   +1 more source

Stability and Frequency Regulation of Inverters with Capacitive Inertia [PDF]

open access: yes, 2017
In this paper, we address the problem of stability and frequency regulation of a recently proposed inverter. In this type of inverter, the DC-side capacitor emulates the inertia of a synchronous generator.
De Persis, Claudio   +4 more
core   +3 more sources

Improved Frequency Control Strategy for Offshore Wind Farm Integration via VSC-HVDC

open access: yesEnergies, 2022
Voltage source converter based high voltage DC system (VSC-HVDC) has become a very promising solution to integrate offshore wind farm. However, the equivalent inertia of the modern power system with large renewable energy integration becomes small, which
Rui Zeng, Yizhen Wang
doaj   +1 more source

Swing Dynamics as Primal-Dual Algorithm for Optimal Load Control [PDF]

open access: yes, 2012
Frequency regulation and generation-load balancing are key issues in power transmission networks. Complementary to generation control, loads provide flexible and fast responsive sources for frequency regulation, and local frequency measurement capability
Low, Steven H.   +2 more
core   +2 more sources

A New Fractional-Order Virtual Inertia Support Based on Battery Energy Storage for Enhancing Microgrid Frequency Stability

open access: yesFractal and Fractional, 2023
Microgrids have a low inertia constant due to the high penetration of renewable energy sources and the limited penetration of conventional generation with rotating mass. This makes microgrids more susceptible to frequency stability challenges.
Morsy Nour   +6 more
doaj   +1 more source

Simulation Analysis of Frequency Regulation

open access: yesIOP Conference Series: Earth and Environmental Science, 2019
Abstract Frequency is one of the most important parameters reflecting the operation quality of the system. When the system is in steady-state operation, the frequency of the generator in the system is equal under steady-state operation. Because the load is changing at any time, this kind of balance is dynamic.
Zhijian Liu   +5 more
openaire   +1 more source

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