European White Book on Real-Time Power Hardware in the Loop Testing : DERlab Report No. R- 005.0

The European White Book on Real-Time-Powerhardware-in-the-Loop testing is intended to serve as a reference document on the future of testing of electrical power equipment, with specifi c focus on the emerging hardware-in-the-loop activities and application thereof within testing facilities and procedures. It will provide an outlook of how this powerful tool can be utilised to support the development, testing and validation of specifi cally DER equipment. It aims to report on international experience gained thus far and provides case studies on developments and specifi c technical issues, such as the hardware/software interface. This white book compliments the already existing series of DERlab European white books, covering topics such as grid-inverters and grid-connected storag

Modelling and analysis of grid integration for high shares of solar PV in small isolated systems- A case of Kiribati

Kiribati, a Pacific Island Country, is striving for high solar PV electricity into national grid in order to reduce its unsustainable dependence on imported fossil fuel. This, however, can pose technical challenges on the reliable operation of the small isolated system. In this work, a technical analysis was carried out to investigate the implications of the planned pipeline of grid connected PV systems on Kiribati’s Tarawa power system. Variations in PV output and corresponding spinning reserve requirements to balance the short fall in the power output were analysed. The utility network was modelled using the PowerFactory software. Steady state and dynamic analyses were then carried out for the simulated scenarios. There were no major concerns identified at times of high load with high PV output. For low system demand with high PV output, dispatch constraints were identified. The current grid system will sustain maximum PV capacity above a load of 3250 kW but will require curtailment below this load. Dynamic simulations showed that fast negative ramps in the PV output can lead to frequency instability during a time of low demand and maximum PV output. The system is stable with PV curtailed at 900 kW if low loads and maximum PV output conditions exist

Proyecto Atlántida adolescencia y escuela : una mirada desde la óptica delos adolescentes de educación secundaria en Colombia

IP 3207-11-001-94al.]. -- Santafe de Bogotá : Fundación FES, 1995. -- 500 p. ;23cm. -- ISBN 9586016439 -- v.2. Todo lo que;nos gusta se evapora / editado por Rodrigo Parra Sandoval; coordinado porAna Isabel Roux. -- Santafe de;Bogotá : Fundación FES, 1995. -- 448 p. ; 23 cm. -- ISBN 9586016447 -- v.3. La ciudad nos habita / editado y;coordinado por Elsa Castañeda B. -- Santafe de Bogotá : Fundación FES, 1995. -- 312 p. ; 23 cm. -- ISBN;9586016255 -- v.4. El silencio era una fiesta / editado ycoordinado por Martha Luz Paradi Z. -- Santafe de;Bogotá : Fundación FES, 1995. -- 333 p. ; 23 cm. -- ISBN 9586016463 -- v.5. Adolescentes colombianos :;LIBROS: v.1. La cultura fracturada : ensayos sobre la adolescencia colombiana / Glora Alzate Medina ... [et;antologias de historias y testimonios / Rocio del Pilar Duran,Marielly Ramirez Ospina. -- Santafe de Bogotá :;Fundación FES, 1995. -- 311 p. ; 27.5 cm