Results 251 to 260 of about 824,899 (292)

A Frequency Control Method Based on A Coordinated Active and Reactive Power Optimization Adjustment for Weak HVDC Sending-end Power Grid

2020 IEEE 4th Conference on Energy Internet and Energy System Integration (EI2), 2020
Block fault of large-capacity HVDC (high voltage direct current) transmission line will cause great impact on the weak HVDC sending-end power grid with high proportional renewable energy generation. A large power imbalance resulting from the week HVDC sending-end power block will lead to AC grid frequency increase accordingly.
Liangzhong Yao, FIEEE, FIET, CEng, Deping Ke   +1 more
exaly   +2 more sources

Enhanced Active Power Adjustment Model in the Reliability Evaluation of the Hybrid AC/DC System

2010 Asia-Pacific Power and Energy Engineering Conference, 2010
An enhanced active power adjustment model is developed for reliability evaluation of the hybrid AC/DC power system. The power flow on the high voltage direct current (HVDC) line is embedded as an optimal variable in the classical active power adjustment model, which will help to analyze the HVDC interconnections as tie lines among regions more ...
Xiuli Wang, Shaoyu Xie, Xifan Wang, Jiefeng Zhong   +3 more
exaly   +2 more sources

Active power real-time control strategy for wind farm considering AGC adjustment capability Limits

2014 IEEE PES T&D Conference and Exposition, 2014
Because of the intermittent and uncertainty of wind power, the change rate and amplitude of power system net-load increase with wind power penetration growing continuously. The prediction error of wind power generation capacity is large, so it's difficult to quantify its impact on AGC adjustment capacity and incorporate wind power maximally.
Hongtao Wang
exaly   +2 more sources

Enhancing Active Power Transfer Capability for Hybrid MMC Integrated with Weak AC Grid through Parameter Adjustment

IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society, 2019
The active power transfer capability (APTC) of a converter integrated with a weak AC grid is limited by the small-signal stability. This paper analyzes the APTC for the hybrid MMC interfacing a weak AC grid. Firstly, the time-domain small-signal model for the hybrid MMC is derived.
Xiaojun Lu, Wang Xiang, Jinyu Wen
exaly   +2 more sources

Adjustable step-size LMS based IRP method for active power filter

2020 International Conference on Computer Communication and Informatics (ICCCI), 2020
in this paper, an improved instantaneous reactive power (IRP) method has been proposed for computation of the reference current of the active power filter. The adjustable step-size least mean square (LMS) algorithm is integrated with the IRP method to improve its transient behaviour of the APF for compensating the harmonics currents.
R. Chander, E.V Sekhar rao, E. Vidhya Sagar   +2 more
openaire   +1 more source

A Series Hybrid Active Power Filter with the function of Adjustable Fundamental Impedance

2020 23rd International Conference on Electrical Machines and Systems (ICEMS), 2020
This paper proposed a series hybrid active power filter (SHAPF) with the function of adjustable impedance. The principle of SHAPF based on magnetic flux compensation is addressed. A linear transformer with air gap and multiple secondary windings is chosen, which are injecting specific currents into multiple secondary windings respectively.
Tingkang Wang, Yuning Hou, Dayi Li
openaire   +1 more source

A Low-Power Low-Phase-Noise VCO With Self-Adjusted Active Resistor

IEEE Microwave and Wireless Components Letters, 2016
This letter presents a low-power low-phase-noise VCO with self-adjusted active resistor (SAAR). A pair of PMOS transistors is introduced between cross-coupled pairs and LC-tank, serving as the SAAR. When cross-coupled transistor resides in the saturation region, SAAR exhibits small resistance, enabling fast switching and suppressing flicker noise up ...
Junyi Sun, Chirn Chye Boon, Xi Zhu, Xiang Yi, Khanna Devrishi, Fanyi Meng   +5 more
openaire   +1 more source

Active power control for preventing voltage instability using an adjustable speed machine

2001 Power Engineering Society Summer Meeting. Conference Proceedings (Cat. No.01CH37262), 2001
One cause of power system voltage instability is the loss of short-term operation equilibrium after a disturbance. This paper proposes an active power control method for preventing short-term voltage instability. The active power control is implemented by means of an adjustable speed machine, which is primarily used as a synchronous condenser, but ...
Y. Xia, M. Shimomura, J. Paserba
openaire   +1 more source

Reconfigurable active front-end of adjustable speed drives for power quality improvement

2009 IEEE Power & Energy Society General Meeting, 2009
A new control scheme is proposed to utilize the active front-end of a high performance adjustable speed drives (ASD) to solve power quality problems caused by conventional diode/thyristor drives. Under the proposed control scheme, a fully controlled active front-end ASD acts as a local power quality conditioner in order to compensate harmonic currents ...
Siyu Leng, II-Yop Chung, Wenxin Liu, David Cartes   +3 more
openaire   +1 more source

Electrolytic Aluminum Load Participating in Power Grid Frequency Modulation Method Based on Active Adjustable Capacity Coordination

2021 3rd Asia Energy and Electrical Engineering Symposium (AEEES), 2021
In recent years, new energy power generation has developed rapidly, and how to absorb the fluctuation of power grid frequency caused by the fluctuation of new energy is the main direction of future development. Using the damping effect of load to simulate the response of load to frequency deviation plays an important role in system frequency response ...
Ling Fang Li, Yixuan Chen, Xinchun Zhu, Qingfang Yu, Xueyi Jiang, Siyang Liao   +5 more
openaire   +1 more source