Measurement-based Method for Wind Farm Power System Oscillation Monitoring

The global increase in the penetration of renewable energy is pushing electrical power systems into uncharted territory, especially in terms of transient and dynamic stability. In particular, the greater penetration of wind generation in European power networks is, at times, displacing a significant capacity of conventional synchronous generation with fixed-speed induction generation and now more commonly, doubly-fed induction generators. The impact of such changes in the generation mix requires careful monitoring to assess the impact on transient and dynamic stability. This paper presents a measurement based method for the early detection of power system oscillations, with attention to mode damping, in order to raise alarms and develop strategies to actively improve power system dynamic stability and security. A method is developed based on wavelet transform and support vector data description (SVDD) to detect oscillation modes in wind farm output power, which may excite dynamic instabilities in the wider system. The wavelet transform is used as a filter to identify oscillations in different frequency bands, while SVDD is used to extract dominant features from different scales and generate an assessment boundary according to the extracted features. Poorly damped oscillations of a large magnitude or that are resonant can be alarmed to the system operator, to reduce the risk of system instability. Method evaluation is exemplified used real data from a chosen wind farm.

Impact of Wind Generation Mix on Transient Stability for an Interconnected Power System

The rapid growth of wind generation in many European countries is pushing power systems into
uncharted territory. As additional wind generators are installed, the changing generation mix may
impact on power system stability. This paper adopts the New England 39 bus system as a test
system for transient stability analysis. Thermal generator models are based on a likely future plant
mix for existing systems, while varying capacities of fixed-speed induction generators (FSIG) and
doubly-fed induction generators (DFIG) are considered. The main emphasis here has been placed
on the impact of wind technology mix on inter-area oscillations following transient grid
disturbances. In addition, both rotor angle stability and transient voltage stability are examined, and
results are compared with current grid code requirements and standards. Results have shown that
FSIGs can reduce tie-line oscillations and improve damping following a transient disturbance, but
they also cause voltage stability and rotor angle stability problems at high wind penetrations. In
contrast, DFIGs can improve both voltage and rotor angle stability, but their power output
noticeably oscillates during disturbances.

Demos and Denomination::flags, fealty, and the political ontology of protests in Northern Ireland

This paper will examine some of the ways in which processes of denomination
have shaped Northern Irish politics before and after the ‘Belfast’, or ‘Good Friday
Agreement’ of 1998. We concentrate on the formation of the ‘Unionist’ or ‘Loyalist
community’, principally because the flag protests of 2012-2013 have brought the
issue of this community identity to the fore again. The flag is part of a whole
machinery of what we, in this paper, will call ‘denomination’ in Northern Irish
politics and elsewhere. The religious overtones of the term are neither accidental
nor incidental. Acts of denomination posit (assertively, authoritatively) a
collective identity, conceived and constituted ontologically, as an existent entity,
and stake a claim to a whole territory.

"This mere speck on the surface of the waters": Rockall aka Waveland

Rockall is a tiny granite knoll isolated in the stormy waters of the North Atlantic. It is not habitable and has of itself no economic value. However, given its location it has been a prize insofar as at one time it was thought its possession could bring control of an exclusive economic zone. Iceland, Ireland and Denmark laid claim in addition to the UK, which had annexed Rockall in 1955, the last territory to be taken into the British Empire. In 1972 Rockall was declared to be part of Scotland. However the United Nations Convention on the Laws of the Sea (1982) now precludes rocks incapable of supporting life to be awarded economic zones. Interest in Rockall then reverted to symbolism especially in its occupation by Greenpeace in 1997 when the global state of Waveland was declared from Rockall’s summit, with Rockall itself as the capital. Greenpeace stayed on Rockall longer than anybody else and a claim has been established to it thereby, but Waveland itself collapsed with the failure of the company that serviced its online presence.

International Boundaries

International boundaries are a basic building block of the modern international state system. The international system dictates a clear spatial distinction between states. International boundaries are the agreed-upon delineation of the spatial allocation of one sovereign territory in relation to that of all others. From a formal perspective, the boundaries of a state delimit the area of applicability of a particular state's sovereignty and pose the only general limitation on the autonomy of sovereignties. Clear and defined boundaries are considered a precondition to the establishment of a state, and control over its boundaries is a sovereign prerogative, whereas an unauthorized breaching of state boundaries by other sovereign powers is considered a declaration of war.

Bills of Rights:A Comparative Perspective

Bills of rights are currently a much debated topic in various jurisdictions throughout the world. Almost all democratic nations, with the exception of Australia, now have a bill of rights. These take a variety of forms, ranging from constitutionally entrenched bills of rights, such as those of the United States and South Africa, to non-binding statements of rights. Falling between these approaches are non-entrenched, statutory bills of rights. As regards the latter, a model which has become increasingly popular is that of bills of rights based on interpretative obligations, whereby duties are placed upon courts to interpret national legislation in accordance with human rights standards. The aim of this book is to provide a comparative analysis of the bills of rights of a number of jurisdictions which have chosen to adopt such an approach. The jurisdictions considered are New Zealand, the United Kingdom, the Australian Capital Territory and the Australian state of Victoria.

There have been very few books published to date which contain a detailed comparative analysis of the bills of rights which this book addresses. The book adopts a unique thematic approach, whereby six aspects of the bills of rights in question have been selected for comparative analysis and a chapter is allocated to each aspect. This approach serves to facilitate the comparative discussion and emphasise the centrality of the comparative methodology.

Planning, Devolution and the Territorialisation of Wind Energy in the UK

The decarbonisation of energy systems draw a new set of stakeholders into debates over energy generation, engage a complex set of social, political, economic and environmental processes and impact at a wide range of geographical scales, including local landscape changes, national energy markets and regional infrastructure investment. This paper focusses on a particular geographic scale, that of the regions/nations of the UK (Scotland, Wales, Northern Ireland), who have been operating under devolved arrangements since the late 1990s, coinciding with the mass deployment of wind energy. The devolved administrations of the UK possess an asymmetrical set of competencies over energy policy, yet also host the majority of the UK wind resource. This context provides a useful way to consider the different ways in which geographies of "territory" are reflected in energy governance, such through techno-rational assessments of demand or infrastructure investment, but also through new spatially-defined institutions that seek to develop their own energy future, using limited regulatory competencies. By focussing on the way the devolved administrations have used their responsibilities for planning over the last decade this paper will assess the way in which the spatial politics of wind energy is giving rise to renewed forms of territorialisation of natural resources. In so doing, we aim to contribute to clarifying the questions raised by Hodson and Marvin (2013) on whether low carbon futures will reinforce or challenge dominant ways of organising relationships between the nation-state, regions, energy systems and the environment.

Beyond the National Resource Privilege: towards an International Court of the Environment

The national resource privilege, which holds that states are allowed to control all the natural resources found in their territory, is a cornerstone of international politics. Supporters of the national resource privilege claim that without the privilege states would fail to be sovereign and self-determining entities which provide for the needs of their citizens. However, as this paper shows the case is not as simple as that. In fact, control over resources must be carefully unpacked. Doing so shows that states do not require full control over all resources found in their territory in order to be sovereign. Moreover, sovereignty and self-determination come with a set of responsibilities and duties attached. Based on these observations the paper will sketch the contours of an alternative resource governance scheme built around the idea of an International Court of the Environment.

Fleuve glauque : les départements de la Seine, banlieue des romans « Spécial Police » de Frédéric Dard

This paper studies the representation of suburbs as a place of anguish in the “Special Police” novels (Fleuve Noir publisher, Paris) by Frédéric Dard. This anxiety, it is argued, is what lends this collection of 25 novels some of their essential qualities, their unhealthy climate and absolute darkness. Dard’s suburbs fit into the traditions of realism; but the atmosphere, characters and plots owe to the American hardboiled school and like in film noir, space is stylized and dramatized, and often used to express a judgment of moral nature. Spatial representations in these novels are part of a critique of civilization and constitute a comment on the social modernization and public intervention in the development of the French territory in the postwar period. The novels written by Frédéric Dard from the mid-1950s to mid-1960s offer a profoundly original representation of suburban angst and what was not yet known at the time as the suburban malaise. Avoiding clichés and excessively connoted referential spaces, Dard anchor these noir novels he called “novels of the night” in landscapes that are both biographical and intertextual. The West Suburbs of Paris and what was
to become the Yvelines department are at the centre of Dard’s novelistic geography, turning into a mythical and deadly space in which is negotiated an acculturation in France of the evil and ruined world described in American noir.