Security of Operation and Identification of Possible Bottlenecks in Southeast Europe Transmission Network Under Market Conditions

Na temelju rezultata proračuna tokova snaga i analize sigurnosti pogona visokonaponske prijenosne mreže u jugoistočnoj Europi, uz tržišno određen angažman proizvodnih postrojenja, opisane su osnovne značajke mreže i identificirana moguća mjesta zagušenja. Ti su proračuni izvedeni u sklopu projekta REBIS (eng. Regional Balkans Infrastructure Study), koji financira Europska komisija, odnosno GIS (Generation Investment Study), studije izgradnje novih proizvodnih kapaciteta u regiji. Tržišni angažman proizvodnih postrojenja u jugoistočnoj Europi u stanjima prognoziranog vršnog opterećenja sustava 2010. i 2015. godine, za različita hidrološka stanja, određen je s pomoću programa WASP (IAEA) i GTMax (Argonne NL). Proračuni tokova snaga izvedeni su uporabom programskog paketa PSS/E (Siemens PTI). U radu se posebice razmatraju simulirani angažman elektrana i pogon prijenosne mreže unutar sustava u Republici Hrvatskoj.Based on the results of calculations of power flows and on the analysis of the operation of the HV transmission network in Southeast Europe, with the market focus on generation facilities, the basic characteristics of the network are described and possible bottlenecks identified. The calculations were done within the EC-funded REBIS project (Regional Balkans Infrastructure Study) and the Generation Investment Study (GIS) of new power generation capacities in the region. The market offering of generation facilities in Southeast Europe at forecast system peak loads in 2010 and 2015, for different hydrological conditions, was determined by the WASP (IAEA) and GTMax (Argonne NL) software. Calculations of power flows were carried out by using the PSS/E software (Siemens PTI). The article particularly discuses simulated power plant output and the operation of the transmission network in the Republic of Croatia

Security of Operation and Identification of Possible Bottlenecks in Southeast Europe Transmission Network Under Market Conditions

Na temelju rezultata proračuna tokova snaga i analize sigurnosti pogona visokonaponske prijenosne mreže u jugoistočnoj Europi, uz tržišno određen angažman proizvodnih postrojenja, opisane su osnovne značajke mreže i identificirana moguća mjesta zagušenja. Ti su proračuni izvedeni u sklopu projekta REBIS (eng. Regional Balkans Infrastructure Study), koji financira Europska komisija, odnosno GIS (Generation Investment Study), studije izgradnje novih proizvodnih kapaciteta u regiji. Tržišni angažman proizvodnih postrojenja u jugoistočnoj Europi u stanjima prognoziranog vršnog opterećenja sustava 2010. i 2015. godine, za različita hidrološka stanja, određen je s pomoću programa WASP (IAEA) i GTMax (Argonne NL). Proračuni tokova snaga izvedeni su uporabom programskog paketa PSS/E (Siemens PTI). U radu se posebice razmatraju simulirani angažman elektrana i pogon prijenosne mreže unutar sustava u Republici Hrvatskoj.Based on the results of calculations of power flows and on the analysis of the operation of the HV transmission network in Southeast Europe, with the market focus on generation facilities, the basic characteristics of the network are described and possible bottlenecks identified. The calculations were done within the EC-funded REBIS project (Regional Balkans Infrastructure Study) and the Generation Investment Study (GIS) of new power generation capacities in the region. The market offering of generation facilities in Southeast Europe at forecast system peak loads in 2010 and 2015, for different hydrological conditions, was determined by the WASP (IAEA) and GTMax (Argonne NL) software. Calculations of power flows were carried out by using the PSS/E software (Siemens PTI). The article particularly discuses simulated power plant output and the operation of the transmission network in the Republic of Croatia

Complete pancreas traumatic transsection

This report presents a case of a twenty-year old male with complete pancreas breakdown in the middle of its corpus, which was caused by a strong abdomen compression, with injuries of the spleen, the firstjejunumcurve,mesocolon transversum, left kidney, and appereance of retroperitoneal haemathoma. Surgical treatment started 70 minutes after the injury. The treatment consisted of left pancreatectomy with previous spleenectomy, haemostasis of ruptured mesocolon transversum blood vessels, left kidney exploration, suturing of the firstjejunumcurvelession and double abdomen drainage. Posttraumatic pancreatitis which appeared on the second postoperative day and prolonged drain secretion were successfully solved by conservative treatment

Utilising Parametric Sensitivity of Unified Power Flow Controller During Voltage Emergency Situations

Abstract: The main purpose of this paper is to investigate regulating characteristics of an UPFC and possible benefits during voltage emergency situation by using all three UPFC's control parameters simultaneously. The control system of the UPFC's injection model is developed and its contributions to avoiding a voltage collapse are explored on a multi-machine test system. The analysis is carried out from dynamic and static aspects. During dynamic time-domain simulations, the extended Jacobian and state matrices are evaluated utilising linearised differential-algebraic system model. With the UPFC being embedded in the system using static approach, the analysis is concentrated on the sensitivities of the UPFC's set of control parameters. The sensitivities concern minimisation of total power loss or maximisation of critical singular value of the matrices. In addition to voltage support capability, usually achieved using two of UPFC's parameters, possible ways of utilisation of the third parameter are shown through sensitivity analysis