000 03803cam a2200325 a 4500
999 _c112530
_d112530
003 IE-CoIT
005 20181024132821.0
008 181022s2018 ie ||||| |||| 00| 0|eng||
040 _aIE-CoIT
082 0 4 _aTHESES PRESS
100 1 _9125529
_aCowhey, Eoin
_eauthor
245 1 0 _aControlled switching of reactive loads & commissioning regimes /
_cEoin Cowhey.
264 1 _aCork :
_bCork Institute of Technology,
_c2018.
300 _axiv, 142 pages :
_billustrations (chiefly color), tables
_c30 cm +
_eCD ROM (4 3/4 in.)
336 _atext
_btxt
_2rdacontent
_3book
336 _atext
_btxt
_2rdacontent
_3CD-ROM
337 _aunmediated
_bn
_2rdamedia
_3book
337 _acomputer
_bc
_2rdamedia
_3CD-ROM
338 _avolume
_bnc
_2rdacarrier
_3book
338 _acomputer disc
_bcd
_2rdacarrier
_3CD-ROM
490 0 _aM.Eng - Electrical & Electronic Engineering
502 _aThesis
_b(M.Eng) -
_cCork Institute of Technology,
_d2018.
504 _aBibliography: (pages 135-137)
520 3 _b'Switching is a vital task in any power system for ensuring its safe and reliable operation. Switching may be necessary for fault clearance, to ensure wider system stability and to prevent damage to plan. It is essential for isolation, to allow technicians to carry out maintenance tasks safely. Also, switching of reactive loads such as shunt capacitor banks and shunt reactors, is crucial for controlling system voltage. Switching of some loads however, may produce voltage transients and heavy transient inrush currents which can impact on wider system power quality, impact customers and cause damage or deterioration of the insulation of HV equipment. Therefore, it is important to provide some form of measure to control or mitigate transients caused by switching. The main control measures include: metal oxide surge arrestors, pre-insertion resistors, current limiting reactors and synchronised or controlled switching. Controlled switching is the favoured solution for frequently switched loads such as reactive plant, for economic benefits and as it reduces transients in the first instance. Controlled switching is defined as the use of electronic equipment to control the making or breaking of high voltage circuit breakers at pre-determined points on the system voltage and current waveforms. It has been implemented in Ireland for over 30 years for the energisation of shunt capacitor banks. Over the last two years, the benefits of controlling switching for different applications has become every more apparent, with increased use such as switching of transmission shunt reactors and the energisation of large power transformers, particularly in remote areas of the network such as wind farm interfaces. The aim of this thesis is to provide a complete overview of the stages concerned in implementing controlled switching schemes, from examining the impacts of switching certain loads, to performing systems studies, up to site commissioning stage. The research in this thesis looks at both the theory and practice. It draws together the published work, manufacturers guidelines, international standards and simulation results, to give the total awareness of the issues involved in reactive load switching and commissioning regimes. The various solutions and strategies associated with controlled switching schemes are examined, to ensure that the best and most economical solution has been implemented. Several recent projects where controlled switching has been implemented for switching of transmission reactors and power transformers are also investigated'. Abstract
590 _aCD available at desk.
650 0 _936645
_aElectric power systems
_xControl
650 0 _9125531
_aElectric reactors, Shunt
650 0 _945336
_aSwitching power supplies
942 _2ddc