Results 11 to 20 of about 306,024 (298)

INTEGRATION OF WIND FARMS INTO WEAK AC GRIDS [PDF]

, 2020
Large wind farms are usually located in remote and offshore areas. High voltage transmission systems that have long transmission distances are used to deliver the wind power to main grids. Weak AC grids have high impedance, low short circuit ratio (SCR) and/or low inertia compared to strong AC grids.
Nawir, Manal
openaire   +2 more sources

Self-synchronization Voltage Source LVRT Control Method for New Energy Inverter under Weak Grid

Zhongguo dianli
The self-synchronization voltage source control technology of the grid-connected inverter is of great significance to the construction of new power system dominated by renewable energy.
Dan LIU, Kezheng JIANG, Yiqun KANG, Xiaotong JI, Yunyu XU, Fang LIU   +5 more
doaj   +2 more sources

Resonant suppression strategy of impedance remodeling for multi-inverter grid-connected system in weak grid

电力工程技术
In weak grid, a multi-inverter grid-connected system may be simultaneously affected by large grid impedance and background harmonics. The interaction between inverter and grid is enhanced by the large grid impedance, resulting in resonance problems ...
ZHANG Shicong, XU Yonghai, TAO Shun, YU Yongyue, ZHANG Zhi   +4 more
doaj   +2 more sources

Stability Assessment of Current Controller with Harmonic Compensator for LCL-Filtered Grid-Connected Inverter under Distorted Weak Grid

Applied Sciences, 2020
An assessment of the stability and performance of current controllers with harmonic compensators is presented for an inductive-capacitive-inductive (LCL)-filtered grid-connected inverter under distorted weak grid conditions.
Seung-Jin Yoon, Thuy Vi Tran, Kyeong-Hwa Kim   +2 more
doaj   +2 more sources

Review of HVDC technologies for weak grid interconnectors

Electrical Engineering
HVDC has experienced substantial growth in utilization globally, attributable to its superior capacity for transmitting large amounts of power relative to its HVAC counterpart and its increasingly competitive pricing. Voltage source converter technology, a variant of HVDC, is particularly well suited for transferring bulk offshore power, whether in ...
Roni Irnawan, Rian Fatah Mochamad, Filipe Faria da SIlva, Qi Zhang, null Sarjiya, Claus Leth Bak, Evy Haryadi   +6 more
openaire   +3 more sources

Voltage stability improvement of weak grids using a new cascade droop control of grid-connected converter

International Journal of Electrical Power & Energy Systems
The voltage control loop of a virtual synchronous generator (VSG) is typically governed by a conventional reactive power-voltage droop control, which may exhibit instability when encountering disturbances or operating under weak grid conditions.
Hayder Hassan Abbas, Qobad Shafiee, Hassan Bevrani   +2 more
doaj   +2 more sources

Control Strategy of Vienna Rectifier With LCL Filter Under Weak Grid Conditions

发电技术, 2019
For the LCL type filter, there is a natural resonance peak, and the change of the grid impedance in the actual power grid will further affect the stability of the rectifier.
Yuanpeng FENG, Jiuhe WANG, Jianguo LI, Qiaojie ZHANG   +3 more
doaj   +2 more sources

Enhanced Stability and Power Quality Control of LCL-GCI Under Weak Grid Conditions Using THQVC

IEEE Access
Grid disturbances and weak grid conditions often lead to synchronization instability in LCL- filtered grid-connected inverters (LCL-GCI), causing challenges in maintaining system stability and power quality.
Pratchaya Pathomchaiwat, Bunlung Neammanee, Jirawut Benjanarasut   +2 more
doaj   +2 more sources

Grid-Connected Inverter Grid Voltage Feedforward Control Strategy Based on Multi-Objective Constraint in Weak Grid

Energies
In weak grid, feedforward of grid voltage control is widely used to effectively suppress grid-side current distortion of inverters caused by harmonics in point of common coupling (PCC) voltage. However, due to its introduction of a positive feedback loop
Su’e Wang, Kaiyuan Cui, Pengfei Hao
doaj   +2 more sources

A modified synchronverter for a weak grid with virtual power circles‐based PQ decoupling scheme [PDF]

IET Renewable Power Generation
The high penetration of renewable energy sources (RES) results in a low‐inertia, weak power grid. To mitigate this and restore system inertia, it has been widely proposed to operate the inverters of RES units to mimic synchronous generators; this ...
Daniel Angelo Kisinga, Peter Makolo, Paul Trodden   +2 more
doaj   +2 more sources