Mott MacDonald

About: Mott MacDonald is a company organization based out in London, United Kingdom. It is known for research contribution in the topics: Electric power system & Wind power. The organization has 586 authors who have published 529 publications receiving 9801 citations. The organization is also known as: Mott MacDonald Group & MMD.

Techno-Economical Optioneering of Offshore Wind Farms Electrical Systems

Abstract: The analysis techniques for assessing the suitability of various layouts for wind farm electrical systems have received a good deal of attention recently. They are becoming increasingly more adapted to various stages of the development. This paper aims to present a techno-economical optioneering technique suitable for application at early stages of the project development for offshore wind farms and to discuss implementation specific issues. The technique, based on calculating traditional initial capital costs equivalents of losses caused by a particular selection of the design, is open for extension when lifecycle costs are combined with estimates of the installed costs. The work discusses aspects of this combination and comments results obtained when it is applied on transmission to onshore sub-systems of the offshore wind farms electrical systems.

Managed Motorways: Modeling and Monitoring Their Effectiveness

Abstract: Managed motorways (formerly known as active traffic management) aim to address traffic congestion and improve journey time reliability with a set of advanced applications of intelligent transport systems to maximize available road capacity. An important feature of managed motorways is the use of hard shoulder running together with variable mandatory speed limits during periods of congestion. Managed motorways were first trialed in the Netherlands and have been in operation in the United Kingdom since 2006. This paper presents the monitoring results of the introduction of managed motorways around Birmingham in the United Kingdom and also describes modeling methods that were used to generalize the findings. Managed motorways around Birmingham have been so effective that they are to be introduced by the UK Highways Agency across the wider network. This paper summarizes the findings of 5 years of monitoring and modeling and refers to the wider set of papers and reports in the public domain for deeper analysis. The paper describes the rigor in monitoring before and after data and in the modeling support for the assessment of outcomes of this transportation investment decision; these outcomes include a reference to the relationship with the economic development in the area. Discussion includes results from a before and after data analysis exercise, the contribution by microsimulation modeling, and findings from an extensive consultation exercise with users of the scheme. The wider economic impacts of investment in managed motorways are examined. The intention is to produce guidance for those transportation organizations that are considering the implementation of managed motorways elsewhere in the world, in particular in the United States.

Modelling the Impacts of Climatic Change on Water Resources

Abstract: Following the prolonged drought at the end of the 1980s in the south east of the UK, Anglian Water undertook (a) to review the reliable yields of their resource systems and (b) to investigate the potential risks associated with alternative future investment programmes. One of the major identifiable risks is climate change, and there is a clear need to understand how different scenarios of climate change could affect the reliable output of existing sources, and thereby affect investment programmes. This paper highlights the approach which was adopted to model climate change impacts on rainfall, and on the limitations which exist for this type of assessment.

Coordinated AVR and tap changing control for an autonomous industrial power system

Abstract: A strategy for voltage and reactive power control of an autonomous industrial power system including distributed generators and loads is presented. The investigation is based on time-domain simulations and aims to define the main functions for the power management system (PMS) that will govern the operation of the power system. Inter-bus transformers (IBTs) are used to limit the fault level but will affect the sharing of the total load reactive power between distributed generators. Generator AVR and on-load tap changing of the IBTs, both supervised by the PMS, are used together to regulate the local load voltages and at the same time to allow reactive power flow through the IBTs for the purpose of equalised sharing. A coordinated strategy is obtained. The knowledge gained from this study can be useful in future cases.