The increasing volume of renewable and intermittent generation that is being connected to power systems means system operators need more advanced dynamic control tools manage the increase in congestion resulting pressure on constraints. thermal-line rating (DTLR) thermal a transmission line calculated real time based online measurements loading asset local weather conditions. This will usually be greater than static currently used, as defined for worst case scenario. Therefore, using allows...

This paper presents the results of development Smart Grid transmission network applications in Great Britain (GB) power system. A new Wide Area Monitoring System (WAMS) application for monitoring inter-area oscillations is developed. The core this novel a fast nonlinear algorithm real-time estimation dominant oscillation mode, which processes GPS synchronized information obtained from Phasor Measurement Units (PMUs) installed It based on Newton-Type Algorithm (NTA), an efficient parameter...

The unbundling of the generation and transmission functions in England Wales into separate shareholder-owned companies has inevitably resulted far less predictability terms generator siting closure. National Grid, as sole company Wales, is required to plan respond quickly changing system patterns maintain both security power quality standards. This been achieved by an extensive programme investment reactive compensation. To supplement existing fixed static VAr compensators installed last...

The ability to predict ferroresonance significantly relies on the accuracy of transformer model and power system's parameters. accomplishment a suitable simulation allows sensitivity studies be performed determine degree influence various components parameters phenomenon such as line length, point-on-wave switching core loss. modelling work carried out in ATP (commercially available software) 1000 MV A 400/275/13 kV is described with field test recordings verified. maps that define...

The key concern for transformers experiencing ferroresonance is whether the energy transferred into transformer body during core saturation by nonsinusoidal currents damaging. Saturation and consequent incompetency of to contain flux manifests itself as current induced in parts not foreseen conduct current. Sustained may last minutes (or even hours), when no intervening operations are carried out, cause local overheating thermally degrade surrounding insulation. In this paper, transient...

The complexity of future power networks and the expected high level uncertainties in these might radically affect required security reliability their operation. Wide-Area Monitoring, Protection Control (WAMPAC) involves use system-wide information communication selected local to a remote location counteract propagation large disturbances reducing by this probability potential catastrophic blackouts. Synchronized Measurement Technology (SMT) is an important element enabler WAMPAC. It that...

This paper presents the results of collaborative research from SUPERGEN FlexNet Consortium into Wide Area Monitoring, Protection and Control (WAMPAC). The focus addresses design development an optimal WAMPAC architecture, communication infrastructure real-time applications which will play important role in future GB power network operation understanding. article concludes with assessment inter-area oscillations based on data records captured by wide area monitoring system (WAMS) established...

The creation of a suitable wide area monitoring system (WAMS) is widely recognized as an essential aspect delivering power that will be secure, efficient and sustainable for the foreseeable future. In Great Britain (GB), deployment first WAMS to monitor entire in real time was responsibility visualization dynamics using enhanced (VISOR) project. core scope VISOR project deploy this demonstrate how applications can near term provide operators planners with clear, actionable information. This...

This study presents a specific roadmap for the deployment of wide area monitoring, protection, and control (WAMPAC) system in future Great Britain (GB) power system. The is designed based on generic roadmap, which draws international experience with development WAMPAC systems, changes GB Based this, proposed identifies oscillation monitoring as key short term goal long To verify that this can be delivered simulations complete model demonstrate new method Newton Type algorithm will more than...

This autoethnographic study involved the author in dual role of researcher and subject a self-study language learning episode. The paper describes foreign experience using mobile phone (Apple iPhone) word card application to learn Italian vocabulary. Data from diary entries were analysed categorised, findings show that strategies, content, motivation interface design are prominent themes. significance these themes is addressed discussion, suggestions for further research made. value order...

A strategy to evaluate the impact of intermediate sources on performance transmission line distance protection is proposed in this study. The influence an infeed sensitivity reach setting and resulting tripping a scheme main emphasis considers effectiveness various schemes challenges expected National Grid network due future changes generation mix. PowerFactory (DIgSILENT software package) will be used simulate double circuit network, when fault occurs strength change from weak typical...

This paper describes a number of novel Wide-Area Monitoring System (WAMS) capabilities and analysis tools, including new monitoring solution that covers the 4-46Hz sub-synchronous oscillation range, deployment source location algorithm. These are being demonstrated under VISOR - an innovation project has created first integrated GB WAMS in order to demonstrate tangible business benefits system. Other work from is discussed hybrid state estimation, dynamic model validation, line parameter...

The offshore wind energy generation industry is developing rapidly in the UK. long submarine cable connection needed between turbine generators and onshore Point of Connection (PoC) introduces additional difficulties for compliance with GB Grid Code reactive power requirement. To address this problem, paper investigates different PoC voltage regulation strategies. methods are compared terms control requirements, fault behaviour farm economics. It shown that distances to PoC, dynamic...

The inductive voltage transformers (VTs) used on the power system are primarily designed for protection or metering at 50Hz. leakage inductance of VT windings and stray capacitances can form a resonant circuit. When subjected to AC voltages frequencies well below resonance, be assumed behave linearly giving accurate measurements. resonance limits bandwidth over which it may provide This is particular importance when taking harmonic transient paper reviews different kinds model available. A...

Against a background of increased use microprocessor based systems and complex electronic devices, power quality reliability is becoming topic growing concern. This paper has attempted to provide general overview these major aspects. The improved co-ordination control flow coupled with reduction disturbances required in order meet the new demands. only realistically possible solid state devices employing real time supervisory systems. application custom solutions will go along way preventing...

The interest in using new technologies to obtain recordings of on-water kinetic variables for assessing the performance elite sprint kayakers has increased over last decades but systematic approaches are warranted ensure validity and reliability these measures. This study an innovative approach, aim was develop a versatile jig including reference force sensors both calibration validation mutual static dynamic stroke forces as measured with instrumented paddles at high levels used kayaking.

The growing availability of real-time data (e.g. wide area monitoring) in power systems makes it possible for the less time sensitive aspects protection to both deliver a secure, selective response and consider economic requirements. An operational tripping scheme (OTS) trips generation prevent cascading thermal overload transmission lines after multiple line outages. This paper presents an enhanced OTS that calculates dynamic ratings (DTLRs) online replace conservative static presently use...

National Grid in its capacity as both a Transmission Owner and System Operator is experiencing changes the network characteristics, brought about by changing patterns generation, transmission demand technology. This paper discusses some observations around performance shares thinking on opportunities considerations for new technology solutions to contribute sustainable system fit tomorrow. The process of specifying analysing mitigate voltage regulation, fluctuations fault level becoming...