Results 21 to 30 of about 1,018 (266)

Nonsynchronous Rotor Blade Vibrations in Last Stage of 380 MW LP Steam Turbine at Various Condenser Pressures

Applied Sciences, 2022
This paper presents an analysis of nonsynchronous rotor blade vibrations in the last stage of an LP steam turbine at various condenser pressures. The nonlinear least squares Levenberg–Marquardt method is used in a tip-timing analysis to determine ...
Romuald Rzadkowski, Pawel Troka, Jerzy Manerowski, Leszek Kubitz, Miroslaw Kowalski   +4 more
doaj   +1 more source

High Voltage Ride through Strategy of Wind Farm Considering Generator Terminal Voltage Distribution

Applied Sciences, 2021
When wind power is transmitted via high-voltage direct current (HVDC), the problem of high-voltage ride-through (HVRT), caused by direct-current (DC) blocking must be seriously taken into account.
Yanhui Qin, Zeyu Cao, Zhichao Yang, Bingtuan Gao, Xuetao Dong   +4 more
doaj   +1 more source

Condensation of Synchronous Orbits on Complex Networks [PDF]

, 2021
Abstract In this paper we study frequency synchronization of Kuramoto oscillators. We find a typical phenomenon of condensed synchronous orbits on single-layer or duplex networks through statistical mechanics analysis and numerical simulations, where the distribution of synchronous orbits is in a bell-shaped form.
Ruiwu Niu, Xiaoqun Wu, Jianwen Feng, Gui-jun Pan, Jun-an Lu, Guanrong Chen   +5 more
openaire   +1 more source

Improving Grid-Connection Reliability and Safety of Synchronous Condensers With Start-Up Process Optimization

IEEE Access, 2020
The new-type synchronous condenser uses the uncontrollable and irreversible freewheeling grid-connection mode during the start-up process, so that considerable rates of grid-connection failure could be observed in case of strict grid-connection ...
Yichao Sun, Zeyu Cao, Qi Wang, Shuzheng Wang   +3 more
doaj   +1 more source

Bose-Einstein Condensate in Synchronous Coordinates

The 2nd Electronic Conference on Universe, 2023
Analytical spherically symmetric static solution to the set of Einstein and Klein-Gordon equations in a synchronous reference frame is considered. In a synchronous reference frame, a static solution exists in the ultrarelativistic limit p=−ε/3. Pressure p is negative when matter tends to contract.
openaire   +2 more sources

Evaluation of inertia resource for securing nadir frequency in HVDC interconnected system with high penetration of RES

Energy Reports, 2023
For power systems to manage a variety of renewable energy sources while securing system stability and reliability, more resources are required. However, due to the interaction of the frequency response resources, determining the appropriate resources for
Jaeyeop Jung, Jeonghoo Park, Hwanik Lee, Byongjun Lee   +3 more
doaj   +1 more source

Research on modeling and a control scheme for synchronous condenser of flywheel energy storage system based on permanent magnet variable frequency speed regulation

Zhejiang dianli
To address the issue of insufficient grid inertia support caused by the large-scale integration of renewable energy， a synchronous condenser model of a flywheel energy storage system， along with a control scheme， is developed based on permanent magnet ...
ZHANG Jiancheng, HU Yuan, HUA Wen, MA Jien, LUO Chao, FANG Youtong   +5 more
doaj   +1 more source

Start-Up Control of a Synchronous Condenser Integrated HVDC System With Power Electronics Based Static Frequency Converter

IEEE Access, 2019
The operation of thyristor-based high-voltage direct current (HVDC) system requires abundant reactive power support. Synchronous condensers, as rotating devices with large capacity of reactive power compensation, are generally utilized in HVDC systems ...
Puyu Wang, Qingwen Mou, Xing Liu, Wei Gu, Xuan Chen   +4 more
doaj   +1 more source

Synchronous Condenser for European Grid Code Compliance: A Case Study of a PV Power Plant in Spain

IEEE Access, 2023
The massive integration of renewable energies into the grid towards the de-carbonisation of the power system has a major impact on the stability of the grid.
Ruben Pascual Jimenez, Carlos A. Platero, Marcos Esteban Sanchez, Eduardo Rivero Barneto   +3 more
doaj   +1 more source

Control Strategy of Dual Power Supply Excitation System for HTS Synchronous Condenser

IEEE Access
High temperature superconducting (HTS) synchronous condenser is a novel large-capacity reactive power compensation device. Its reactive power compensation capacity and accuracy are mainly determined by the excitation system, making the excitation power ...
Jinfeng Wang, Hao Yin, Tiantian Cao, Zhu Liu, Dayi Li   +4 more
doaj   +1 more source