Results 91 to 100 of about 25,975 (270)
Impact Mechanisms of Commutation Failure Caused by a Sending-End AC Fault and Its Recovery Speed on Transient Stability [PDF]
, 2023 Yifeng Lin +3 more
openalex +1 more source
Adaptive VDCOL control strategy for the recovery of the UHVDC SPC system
The Journal of Engineering, 2019 The separating pole connection (SPC) mode of ultra-high-voltage direct current (UHVDC) can significantly improve the power stability, but when the AC bus of one pole is failed and two receiving systems are near, it may cause subsequent commutation ...
Shujun Yao +3 more
doaj +1 more source
Towards a quantum theory of de Sitter space
, 2006 We describe progress towards constructing a quantum theory of de Sitter space in four dimensions. In particular we indicate how both particle states and Schwarzschild de Sitter black holes can arise as excitations in a theory of a finite number of ...
A. Ashtekar +15 more
core +1 more source
The Political Quarterly, EarlyView.Abstract In the UK, the new Labour government has linked the intention to deliver more homes to reform of the planning system, which is seen as a key barrier. Two assumptions inform this reform. First, the system is sound, but there are problems with its administration.
Nancy Holman, Alan Mace
wiley +1 more source
International Journal of Electrical Power & Energy SystemsThe hybrid cascaded high voltage direct current (HC-HVDC) systems combine MMC and LCC features. However, single-phase ground faults on the AC lines of the receiving end power grid can easily cause LCC commutation failure on the inverter side.
He Wang +5 more
doaj +1 more source
Energies, 2019 Ultra-high voltage direct current (UHVDC) systems under hierarchical connection schemes (HCSs) linked to AC grids with different voltage levels (500 and 1000 kV) have been a great concern for power utilities to transfer bulk power.
Atiq Ur Rehman +2 more
doaj +1 more source
Housing, Inequality and London
The Political Quarterly, EarlyView.Abstract Regional inequalities are deeply entrenched in the UK. London, and its wider region, is often seen as the beneficiary of these inequalities. The capital houses a disproportionate share of the nation's population and its economic output. But London is also home to higher levels of inequality, poverty and child poverty than anywhere else in the ...
Jack Brown, Joe Fyans
wiley +1 more source
Quons, an interpolation between Bose and Fermi oscillators [PDF]
After a brief mention of Bose and Fermi oscillators and of particles which obey other types of statistics, including intermediate statistics, parastatistics, paronic statistics, anyon statistics, and infinite statistics, I discuss the statistics of ...
Greenberg, O. W.
core +1 more source
Classical and Quantum sl(1|2) Superalgebras, Casimir Operators and Quantum Chain Hamiltonians
, 1995 We examine the two parameter deformed superalgebra $U_{qs}(sl(1|2))$ and use the results in the construction of quantum chain Hamiltonians. This study is done both in the framework of the Serre presentation and in the $R$-matrix scheme of Faddeev ...
Chryssomalis Chryssomalakos +3 more
core +2 more sources
Labour's Planning Reform: A View from London
The Political Quarterly, EarlyView.Abstract This article examines the English planning reform agenda of the Labour government elected in 2024. It frames London's outer boroughs as a critical lens through which to assess it. Drawing on the findings of the cross‐party Suburban Taskforce (2020–2022), the article has particular regard to the proposed reconfiguration of planning committees ...
Dimitrios Panayotopoulos‐Tsiros +2 more
wiley +1 more source