Is the electric vehicle a solution for the wind power integration in the portuguese power system?

The integration of Plug-in electric vehicles in the transportation sector has a great potential to reduce oil dependency, the GHG emissions and to contribute for the integration of renewable sources into the electricity generation mix. Portugal has a high share of wind energy, and curtailment may occur, especially during the off-peak hours with high levels of hydro generation. In this context, the electric vehicles, seen as a distributed storage system, can help to reduce the potential wind curtailments and, therefore, increase the integration of wind power into the power system. In order to assess the energy and environmental benefits of this integration, a methodology based on a unit commitment and economic dispatch is adapted and implemented. From this methodology, the thermal generation costs, the CO2 emissions and the potential wind generation curtailment are computed. Simulation results show that a 10% penetration of electric vehicles in the Portuguese fleet would increase electrical load by 3% and reduce wind curtailment by only 26%. This results from the fact that the additional generation required to supply the electric vehicles is mostly thermal. The computed CO2 emissions of the EV are 92 g CO2/kWh which become closer to those of some new ICE engines.

Maximizing the Social Welfare of Virtual Power Players Operation in Case of Excessive Wind Power

The integration of growing amounts of distributed generation in power systems, namely at distribution networks level, has been fostered by energy policies in several countries around the world, including in Europe. This intensive integration of distributed, non-dispatchable, and natural sources based generation (including wind power) has caused several changes in the operation and planning of power systems and of electricity markets. Sometimes the available non-dispatchable generation is higher than the demand. This generation must be used; otherwise it is wasted if not stored or used to supply additional demand. New policies and market rules, as well as new players, are needed in order to competitively integrate all the resources. The methodology proposed in this paper aims at the maximization of the social welfare in a distribution network operated by a virtual power player that aggregates and manages the available energy resources. When facing a situation of excessive non-dispatchable generation, including wind power, real time pricing is applied in order to induce the increase of consumption so that wind curtailment is minimized. This method is especially useful when actual and day-ahead resources forecast differ significantly. The distribution network characteristics and concerns are addressed by including the network constraints in the optimization model. The proposed methodology has been implemented in GAMS optimization tool and its application is illustrated in this paper using a real 937-bus distribution network with 20.310 consumers and 548 distributed generators, some of them non-dispatchable and with must take contracts. The implemented scenario corresponds to a real day in Portuguese power system.

Load Control Timescales Simulation in a Multi-Agent Smart Grid Platform

Environmental concerns and the shortage in the fossil fuel reserves have been potentiating the growth and globalization of distributed generation. Another resource that has been increasing its importance is the demand response, which is used to change consumers’ consumption profile, helping to reduce peak demand. Aiming to support small players’ participation in demand response events, the Curtailment Service Provider emerged. This player works as an aggregator for demand response events. The control of small and medium players which act in smart grid and micro grid environments is enhanced with a multi-agent system with artificial intelligence techniques – the MASGriP (Multi-Agent Smart Grid Platform). Using strategic behaviours in each player, this system simulates the profile of real players by using software agents. This paper shows the importance of modeling these behaviours for studying this type of scenarios. A case study with three examples shows the differences between each player and the best behaviour in order to achieve the higher profit in each situation.

Real-Time Tariffs for Electric Vehicles in Wind Power based Power Systems

The use of Electric Vehicles (EVs) will change significantly the planning and management of power systems in a near future. This paper proposes a real-time tariff strategy for the charge process of the EVs. The main objective is to evaluate the influence of real-time tariffs in the EVs owners’ behaviour and also the impact in load diagram. The paper proposes the energy price variation according to the relation between wind generation and power consumption. The proposed strategy was tested in two different days in the Danish power system. January 31st and August 13th 2013 were selected because of the high quantities of wind generation. The main goal is to evaluate the changes in the EVs charging diagram with the energy price preventing wind curtailment.

A Multiple Criteria Utility-based Approa h for the Unit Commitment with Wind Power and Pumped Storage Hydro

The integration of wind power in eletricity generation brings new challenges to unit commitment due to the random nature of wind speed. For this particular optimisation problem, wind uncertainty has been handled in practice by means of conservative stochastic scenario-based optimisation models, or through additional operating reserve settings. However, generation companies may have different attitudes towards operating costs, load curtailment, or waste of wind energy, when considering the risk caused by wind power variability. Therefore, alternative and possibly more adequate approaches should be explored. This work is divided in two main parts. Firstly we survey the main formulations presented in the literature for the integration of wind power in the unit commitment problem (UCP) and present an alternative model for the wind-thermal unit commitment. We make use of the utility theory concepts to develop a multi-criteria stochastic model. The objectives considered are the minimisation of costs, load curtailment and waste of wind energy. Those are represented by individual utility functions and aggregated in a single additive utility function. This last function is adequately linearised leading to a mixed-integer linear program (MILP) model that can be tackled by general-purpose solvers in order to find the most preferred solution. In the second part we discuss the integration of pumped-storage hydro (PSH) units in the UCP with large wind penetration. Those units can provide extra flexibility by using wind energy to pump and store water in the form of potential energy that can be generated after during peak load periods. PSH units are added to the first model, yielding a MILP model with wind-hydro-thermal coordination. Results showed that the proposed methodology is able to reflect the risk profiles of decision makers for both models. By including PSH units, the results are significantly improved.

A Avaliação Imobiliária e a sua relação com o Investimento

O presente relatório visa cumprir os requisitos da unidade curricular Dissertação, Projeto ou Estágio (DIPRE) do mestrado em Engenharia Civil do Instituto Superior de Engenharia do Porto (ISEP). O estágio curricular decorreu na empresa VPM - Vaz Pinto Mendes - Unipessoal Lda, sob o tema: “A avaliação imobiliária e a sua relação com o investimento”. A avaliação imobiliária visa determinar o valor associado aos bens imóveis. Pode ser aplicada a todo o tipo de bens imóveis, tais como: apartamentos e moradias uni e multifamiliares, espaços comerciais e de serviços, quintas, unidades hoteleiras e industriais, complexos desportivos, entre outros. A avaliação imobiliária poderá ser solicitada por parte de proprietários ou arrendatários dos imóveis, por empresas, tribunais, advogados e solicitadores. Apresenta diversos fins, tais como a determinação do valor de indemnização devido a expropriações, o financiamento hipotecário para compra ou construção de imóveis, partilhas, estudo de um investimento financeiro, intenção de venda ou arrendamento, efeitos fiscais ou apenas o simples conhecimento do valor aproximado das propriedades que se possui. O presente estudo visa abordar o atual mercado imobiliário nacional, o procedimento de realização de uma avaliação imobiliária e principalmente os métodos de avaliação tradicionais.

Scholfield-Galbraith family fonds, 1865-1924

The Scholfield and Galbraith families of Dunnville, Ont. were related by marriage. Thomas Jefferson Galbraith (1842-1921) worked as a collector of canal tolls at Port Maitland, a landing waiter and searcher and an acting preventive officer in Customs. He was married to Jane Ann [Jennie] Montieth and they had five children, Margaret, Minnie Montieth, Genevieve Marion, Edith Stuart and Thomas Percy Galbraith. Genevieve Marion Galbraith was married to Harry E. Scholfield, son of Frederick Scholfield (d.1908) and Georginna Galer (d. 1888), a dry goods merchant in Dunnville. Some extent records belong to a William Scholfield who operated a mill in Dunnville. Included are records related to land lease, mortgage and bargain and sale agreements between Scholfield and various individuals, including Richard Kirkpatrick, William Kohler, Alvin Drake, Robert Ban[u]d, Henry Beckett, Sr., Samuel Waltho, Nehemiah Niece.

Indenture between William Arnott and Elizabeth Arnott and Nathan Thomas Fitch

Indenture of mortgage between William Arnott and Elizabeth Arnott of Welland County to Nathan Thomas Fitch of Welland County for Lots numbered 37 and the south half of 40 and 41 in the village of Merritville - instrument no. 5400, September 12, 1836.

Indenture between William and Ann Waters and William B. Winterbottom

Indenture of mortgage with dower between William and Ann Waters of Niagara to William B. Winterbottom of Niagara regarding the easterly half of Lot no. 265 in Niagara. This was recorded in the Register of Forms of Niagara on April 13, 1850, Book A, folios 207-208 - instrument no. 2093, April 1, 1850.

Indenture between Joseph Augustus Woodruff and Thomas Sheppard Smyth

Indenture of mortgage between Joseph Augustus Woodruff of the town of Niagara and Thomas Sheppard Smyth of Stamford Township regarding Lot no.4 in the 3rd Concession of Dereham - instrument no. 2803, September 2, 1850.

Indenture between Charles Adams and Charles Ira Ames

Indenture of mortgage between Charles Adams of Hamilton and Charles Ira Ames of Hamilton of the first part to Frances Malvinia, wife of Charles Adams of the second part and Thomas Clarke Street of Chippewa, eldest son and heir of Samuel Street of the third part regarding Lot no. 5 in the 5th Concession in the Township of Caradoc in the County of Middlesex, May 5, 1854.

Indenture between John Picard and Peter Servos

Indenture of mortgage in fee between John Picard of the Township of Niagara and Peter Servos of the Township of Niagara regrading part of Lot no. 113 in the Township of Niagara - instrument no. 6269. This is listed in book B, folio 33, August 17, 1855.

Indenture between Thomas Murtagh and Samuel Zimmerman

Indenture of mortgage in fee between Thomas Murtagh of the Town of Elgin and Samuel Zimmerman of NIagara Falls regarding Lot no. 15 in Block N in the Town Plot of Elgin - instrument no. 3164[9?], September 24, 1855.

Indenture between Patrick and Mary Burns and Samuel DeVeaux Woodruff

Indenture of mortgage in fee with dower between Patrick and Mary Burns of the Township of Grantham and Samuel DeVeaux Woodruff of St. Catharines regarding parts of Lots no. 19 and 23 in the 5th Concession in the Town of Grantham - instrument no. 14820. Listed in Book E, folio 339, October 3, 1864.

Indenture between Owen Clifford and Margaret Clifford to Samuel D. Woodruff

Indenture of mortgage deed between Owen Clifford and Margaret Clifford of the Township of Grantham to Samuel D. Woodruff of St. Catharines regarding 36 3/4 acres in Lots numbered 12 and 13 in the 8th Concession in the Township of Grantham - instrument no. 187. This was registered at the Registry Office for Lincoln on April 30, 1867 in Liber I, March 29, 1867.