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    • AC “back to back” switching device in industrial application 

      Faranda, Roberto; Hafezi, Hossein; Akkala, Kishore; Lazzaroni, Massimo (MDPI, 09.07.2020)
      article
      In industrial applications, among several varieties of semiconductor devices available, a silicon-controlled rectifier (SCR) is often used in managing and protecting various systems with different applications. Hence, it ...

    • Advanced islanding detection in grid interactive microgrids 

      Laaksonen, Hannu; Hovila, Petri; Kauhaniemi, Kimmo; Sirviö, Katja (CIRED, 07.06.2018)
      conferenceObject
      In the future active network management and protectionsolutions have to enable utilization of intended islandoperation as well as active control and utilizationflexibilities during normal and islanded operation ofgrid ...

    • Alternative solutions for advanced security of supply 

      Lågland, Henry; Kumpulainen, Lauri; Kauhaniemi, Kimmo; Salo, Ari; Leppinen, Jarmo (International Conference and Exhibition on Electricity Distribution CIRED, 01.06.2019)
      conferenceObject
      The restrictions regarding the maximal length of outages especially under major storms has resulted in massive underground cabling projects in the network companies in Finland and Sweden. Due to these expensive investments ...

    • Evaluation of renewable energy development in power generation in Finland 

      Aslani, Alireza; Helo, Petri; Naaranoja, Marja (AIP Publishing, 20.12.2013)
      article
      Renewable energy resources have historically played an important role for heat/electricity generation in Finland. Although diffusion costs of renewable energy utilization are higher than fossil fuels and nuclear power ...

    • Fault type and location detection in islanded microgrid with different control methods based converters 

      Laaksonen, Hannu; Kauhaniemi, Kimmo (CIRED, 21.05.2007)
      conferenceObject
      In this paper the fault type and location detection in an islanded low voltage (LV) distribution network based microgrid with converters applying different control methods is studied. In the ...

    • From the Periphery to a Global Player : Historical Evolution of the Qatari Banking Sector 

      Abumughli, Ala’ Azmi; Aysan, Ahmet Faruk; Arslan, Ahmad; Gölgeci, İsmail; Bouguerra, Abderaouf; Bulut, Mehmet; Altay, Bora; Korkut, Cem (Palgrave Macmillan, 16.02.2024)
      bookPart
      The incredibly rapid and remarkable rise of the banking industry in Qatar contains valuable historical lessons that the extant research has so far overlooked. We rely on the elite interviews with the pivotal players of the ...

    • Linear fractional transformations of Nevanlinna functions associated with a nonnegative operator 

      Behrndt, Jussi; Hassi, Seppo; de Snoo, Henk; Wietsma, Rudi; Winkler, Henrik (Birkhäuser, 04 / 2013)
      article
      In the present paper a subclass of scalar Nevanlinna functions is studied, which coincides with the class of Weyl functions associated to a nonnegative symmetric operator of defect one in a Hilbert space. This class consists ...

    • Profitability of technical trading rules among cryptocurrencies with privacy function 

      Ahmed, Shaker; Grobys, Klaus; Sapkota, Niranjan (Elsevier, 18.03.2020)
      article
      This paper studies simple moving average trading strategies employing daily price data on the ten most-traded cryptocurrencies that exhibit the ‘privacy function’. Investigating the 2016–2018 period, our results indicate ...

    • Utilization of a mixture of CTs and current sensors in line differential protection applications 

      Raipala, Ontrei; Hovila, Petri; Leminen, Janne; Farughian, Amir; Memon, Aushiq; Kauhaniemi, Kimmo (CIRED, 03.06.2019)
      conferenceObject
      The popularity of Rogowski sensors is increasing due to their advantages over conventional CTs. Consequently, network utilities may sometimes end up facing a question whether it would be possible to use line differential ...

    • Voltage and current THD in microgrid with different DG unit and load configurations 

      Laaksonen, Hannu; Kauhaniemi, Kimmo (CIRED, 23.06.2008)
      conferenceObject
      After microgrid transition from the normal operation to the islanded operation the system impedance changes considerably and it affects on the harmonic voltages of the microgrid. In this paper the voltage ...