Results 21 to 30 of about 641,410 (267)
IET Power Electronics, EarlyView., 2023 This article presents a Fifteen‐level inverter topology that has a lesser number of switches (12) and can accommodate isolated DC sources. The total harmonic elimination (THD) of the proposed topology using genetic algorithm is within the IEEE 519 standards. Further, the fifteen‐level inverter is implemented in Hardware and firing pulses were generated
Yogesh Joshi +4 more
wiley +1 more source
Optimization of Reactive Power Configuration for Offshore Wind Farms
Zhongguo dianli, 2020 According to the reactive power configuration principles of offshore wind farms, this paper analyzes the reactive power losses of offshore wind farms, mainly consisting of wind turbines, submarine cables and main transformers.
Yuan YANG +5 more
doaj +1 more source
Setup for measuring and simulating high-frequency overvoltages of power transformer
2019 2nd International Colloquium on Smart Grid Metrology (SMAGRIMET), 2019 During their operation, power transformers are stressed by switching and lightning overvoltages. Transformers that are extensively exposed to these stresses are usually equipped with transformer monitoring system which enables assessing the transformer’s condition at any given time.
Jurišić, Bruno +3 more
openaire +3 more sources
Open Physics, 2020 In order to solve the problem that the long cable variable voltage and variable frequency (VVVF) system does not adopt an effective capacitor voltage sharing control method, resulting in a poor effect of resonance overvoltage control, the resonance ...
Deng Yonghong, Zhang Quanzhu
doaj +1 more source
Zhongguo dianli, 2021 China's primary energy production bases and load centers are inversely distributed and the renewable energy of the production base cluster is delivered through UHVDC cluster, so the coupling characteristics of wind power and DC are complex in the power ...
Zhaohui QIE +4 more
doaj +1 more source
Infeasibility Analysis of Half-Wavelength Transmission Systems
Energies, 2018 This paper analyzes the infeasibility of half-wavelength transmission systems in the aspects of power-frequency overvoltage and synchronization stability. The circuit model of the long-distance transmission system is established at first for steady-state
Zheng Xu, Jian Yang, Nengjin Sheng
doaj +1 more source
Introducing small storage capacity at residential PV installations to prevent overvoltages [PDF]
, 2011 Low voltage distribution feeders are designed for unidirectional energy supply from transformer to consumer. However, the implementation of small-scale PV production units on local utilities may result in bidirectional energy flows.
Cappelle, Jan +6 more
core +1 more source
Power balancing and dc fault ride through in DC grids with dc hubs and wind farms [PDF]
, 2015 Acknowledgment This project was funded by European Research Council under the Ideas program in FP7; grant no 259328, 2010.Peer ...
Jovcic, Dragan, Lin, Weixing
core +1 more source
PI-based controller for low-power distributed inverters to maximise reactive current injection while avoiding over voltage during voltage sags [PDF]
, 2018 This paper is a postprint of a paper submitted to and accepted for publication in IET Power Electronics and is subject to Institution of Engineering and Technology Copyright.
Camacho Santiago, Antonio +4 more
core +2 more sources
Zhejiang dianli, 2023 Grid-connected offshore wind farms are likely to cause harmonic resonances in the power system that jeopardize the safe operation of the power grid. To this end， the impact of grid-connected offshore wind farms on the transient overvoltage and harmonic ...
XU Qunwei +6 more
doaj +1 more source