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The DC grids supplying electric vehicles are starting to gain interest worldwide. The DC faults management represent an important design and exploitation issue in these networks. This paper proposes an electronic switch for DC networks supplying electric vehicles (EV). Tests of the proposed switch were carried on under DC faults occurrence in presence of EV. The control of the low voltage distribution...
This paper gives a status report on activities of CIGRE/CIRED JWG C4.24. The following issues are addressed in the paper: Introduction, scope of the report and terminology; New developments in power electronics (PE); Changes in probability of interference; Microgrids and PQ; Volt-VAR control and PQ; Feeder reconfiguration and PQ; Demand side management and PQ; New measurement techniques; New mitigation.
Economic and environmental reasons stimulated people to build low energy houses all over the world. In order to study this kind of buildings, adapted to the Romanian climatic conditions, a new project was developed by the University POLITEHNICA of Bucharest. The present paper deals with the presentation of the passive house build within the campus of University POLITEHNICA of Bucharest and with the...
The present paper deals with the power quality analysis in a wastewater treatment plant. The measuring campaign was conducted for 1 week and has the objective to investigate the energy efficiency and power quality impact of the plant functioning. The wastewater treatment plant is located in the east side of Romania, in the second largest city of Romania and on the Black Sea seaside. The analysis revealed...
In this article was examined the technical and economic potential of connecting the high voltage electricity networks of three countries with a new high voltage transmission line. The analysis investigated options and technical recommendations for the optimal configuration a 750 kV transmission corridor. In doing so, it was recognized reconnection of the corridor holds the promise of improving energy...
The ever-increasing presence of the wind generation in Romania power system triggers a vast array of challenges ranging from reliability, fault-ride-through capabilities, green certificates incentives, etc. The impact on power quality of a wind farm located in south-east of Romania composed of 45 wind turbines is investigated. The paper deals with power quality case studies conducted on existing renewable...
This paper analyzes a way to reduce the problem associated with the operating temperature of PV converters in extreme environmental conditions. A new liquid cooling system for PV converters is proposed. Several experiments with a PV converter prototype submersed in the coolant are performed. The results reveal that the presence of coolant determines, at the end of test, a converter's temperature variation...
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