142 research outputs found
Initial Validation of the Race-Ethnicity Supervision Scale (RESS)
No full textIn this dissertation study, the author reports on the initial psychometric evaluation of the Race-Ethnicity Supervision Scale (RESS) with data collected from three studies and 307 mental health counseling and psychology trainees. Exploratory factor analyses yielded a 29-item scale with a four factor model (a) Promoting Supervisee Racial/Ethnic Cultural Competence, (b) Development and Responsivity to Cultural Identity in Supervision, (c) Perceived Supervisor Cultural Competence, and (d) Harmful Supervisory Practices. RESS scores were internally consistent and remained stable over a 3-week period. Construct validity evidence suggested RESS scores were positively related to MSI scores and unrelated to social desirability. Limitations and recommendations for future research are also discussed
Advies der advocaeten van den grooten raede tot Mechelen. Casus-positie.
No full textBetreffende Juffrouw Adriana Elisabeth Donckers en de erfgenamen van den heere Bruno Gysels haeren swager.Europeana-GoogleBook
Den doorluchtigen hooghgeboren vorst eñ heere Wilhem Henrick, van Gods genade Prince van Orange, werden dese afbeeldingen, van weinighe schoorsteen-wercken, meest ten bevele vande doorl. hooghgeborene Zijne Hooch.ts Heeren grootvader, vader en vrouw grootmoeder /
No full textFirst plate is illustrated title. Plates [2]-[23] depict chimneypieces. All plates were drawn by Post and engraved mostly by Jan Matthysz., with two by Pieter Nolpe. Ten of the chimneypieces are from the Sael van Orange in the Huis ten Bosch.Mode of access: Internet.At upper left-hand corner of front pastedown is Theodore Besterman's calligraphic label, signed in the plate by P.S. The overmantel of the 9th plate in the Getty copy has been supplied with a sketch in black crayon.Binding: modern paper, back and corners of mottled sheepskin. Spine tooled in gilt, with author & title in gilt on label
Hungary
No full textA summary of central and local Hungarian archival collections maintained by religious institutions, government agencies, and individuals, emphasizing documents related to the Habsburg monarchy. With the crowning of Ferdinand I as king in 1526, Hungary joined in a semiautonomous union with Austria that lasted, with marked ambivalence, until 1918. The Hungarian National Archives in Budapest contain court documents, government records, property records, noble family archives, personal papers of parliamentary, judicial, and military leaders, and documents of organizations such as the Freemasons. Smaller but significant collections in regional or county archives, municipal archives, local court archives, diocesan archives, and repositories of other religious communities, including Franciscans, Jesuits, Calvinists, Baptists, and Jews, allow researchers to access information reflective of all aspects of daily life in Hungary
Relocatable Energy Storage Systems for Congestion Management
No full textThe rapid growth of rooftop solar, and on the rise technologies such as electric vehicles and heat pumps, is leading to congestion problems in low voltage distribution networks. If not dealt with, the congestion will prevent the installation of further units limiting the pace of the energy transition. Energy Storage Systems (ESS) are often seen as the technology with a high potential for congestion reduction. In this paper, we propose to use Relocatable Energy Storage System (RESS) fleet, to physically move the ESS throughout the distribution grid in an effort to alleviate congestion. The proposed method consists of two parts. First, a Mixed Integer Linear Program (MILP) is created to minimise the amount of RESS used and penalise displacement. Second, an algorithm with a Minimum Cost Maximum Matching objective is used to determine the dispatch of each individual RESS. The results on a CIGRE test system show the benefits of this method compared to stationary placed ESS in the grid."Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public."Intelligent Electrical Power Grid
Relocatable Energy Storage Systems for Congestion Management
No full textIn 2018 the Dutch government, businesses and other stakeholders started negotiating an agreement to combat climate change (het Klimaatakkoord). Energy consumption is changing and more Renewable Energy Sources (RES) are implemented. While these changes are ongoing, the Distribution System Operators (DSOs) must ensure no congestion occurs in the grid. However, it seems congestion problems are already arising. As a lot of research has been done on Energy Storage Systems (ESSs) and Electric Vehicles (EVs) for congestion prevention, research on movable ESSs is missing. This thesis proposes a method for congestion prevention by Relocatable Energy Storage Systems (RESS). A Mixed Integer Linear Program (MILP) is proposed to minimise the amount of RESS used and penalise displacement. An algorithm which includes a Minimum Cost Maximum Matching is used to determine the planning of each individual RESS. The results show that, for the test grid designed, it is beneficial to use RESS instead of statically placed ESS in the grid
Impact of Virtual Synchronous Generators on Power System Frequency Dynamics
No full textThis paper deals with a systematic assessment of the power system frequency dynamics under high penetration of converter-interfaced renewable energy sources (CI-RESs). Specifically, the concept of the virtual synchronous generator (VSG) is implemented in the CI-RESs located at the transmission system (TS) side and/or the distribution network (DN) side. Dynamic RMS simulations are performed on a testbed consisting of the IEEE 9-bus TS grid and the CIGRE medium-voltage DN grid under different CI-RES penetration levels and VSG control parameters to assess the VSG impact on the power system frequency dynamics. It is shown that the decommissioning of conventional power plants coupled via synchronous generators can be safely performed in case the VSG concept is adopted correctly.Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Intelligent Electrical Power Grid
Optimization and Energy Management of a Microgrid Based on Frequency Communications
No full textIn recent years, a transition towards a more sustainable future has started and it is imperative that this trend continues. An increasing energy demand from the continuously growing population, together with the increment of greenhouse gasses (GHG) emissions and the depletion of fossil fuels have motivated the penetration of renewable energy systems (RESs) in different areas and scales. As a consequence, the energy sector is facing a transition from a centralized network, composed of large and controllable power plants, to a decentralized grid based on RESs. Within this framework, microgrids (MGs) provide a key solution to integrate RESs, controllable energy resources, flexible loads and storage systems either in a grid-connected or an islanded mode. Optimal energy management is crucial to develop strategies to improve the efficiency and reliability ofMGs, as well as newcommunication networks to support optimal and reliable operation. This study proposes an energy management system (EMS) whose main objective is to optimally operate a microgrid (MG) using frequency as the only communication signal. The developed model considers renewable energy sources (RESs) such as photovoltaic (PV) panels and wind turbines, a micro-generator, a battery energy storage system (BESS) and both critical and controllable loads. In a conventional grid with a control system based on frequency communications, each element of the grid has a droop curve and the frequency reflects the generation - load balance as a result of a compromise between each other. However, in the inertia-less grid proposed in this thesis the EMS controls the BESS and solves the optimization problem, which determines the optimal frequency of the system. The rest of the system components react according to the optimal frequency by following their specific frequencypower response curves. In thisway, an optimal planning and operation of theMGis sought in order to minimize operational costs and consequently increase the use of RESs, reduce GHG emissions, perform a smart charge of the BESS and optimally operate the diesel generator. A demand-side management (DSM) mechanism is introduced in order to manage controllable loads via load-shedding to match availability of RESs. To further adjust generation to load demand, RESs curtailment or supply-side management (SSM) is implemented through the application of a version of an available standard that ensures grid security when connecting RES generators to the grid. The performance of the proposed EMS will be validated through simulation results for different scenarios using real numerical data from an existing microgrid, comparing the results against the traditional control system.Electrical Engineering, Mathematics and Computer ScienceElectrical Sustainable EnergyDC systems, Energy conversion & Storag
Modelling and Optimization of a Hydrogen Refuelling Station with CH2P Technology: Delivering decentralized hydrogen and electricity for mobility
No full textThe vehicle industry is increasingly exploring emission-free mobility. Transforming the mobility sector to zero-emission vehicles that consume renewable and low carbon fuels is necessary to reduce the impacts on climate change. Hydrogen powered electric vehicles, or Fuel Cell Electric Vehicles (FCEVs), could make a significant contribution to reduce GHG-emissions and energy use in the transport sector. The current refuelling network for hydrogen vehicles is in its very early stages. The Cogeneration of Hydrogen,Heat and Power project (CH2P) aims to impact the sector with a more efficient solution for the growing hydrogen infrastructure. It does so by offering very efficient decentralized H2 refuelling stations. The goal of this project is to design a refuelling station that has the ability to refuel hydrogen vehicles and to charge electric vehicles. The onsite CH2P production system is based on SMR and SOFC technology. A thermodynamic model has been designed to size and optimize all the station components. This includes the compression, intercooling, storage, throttling, precooling and dispensing of hydrogen, and the storage and charging of power. Main messages to take away from this analysis are the following: CH2P as a decentralized production method is protable. For higher station utilization the NPV has the potential to increase further by 55 %. Cascade filling of vehicles reduces the total storage and energy demand, and greatly reduces the CAPEX of the station. The optimal configuration consisted only of 950 bar High Pressure Storages. By adding a battery to the station, the system can power five fast-chargers to charge BEVs. However, power production by CH2P is more expensive than grid power and the current electric system is not sufficient for coping with sudden power fluctuations.Mechanical Engineering | Energy and Process Technolog
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