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Protection Solutions for HV Power Facilities
An Innovative, Corona-Minimising Air Terminal Technology and a Scientifically-backed Placement Methodology to IEEE Std. 998
IEEE STANDARD 998
IEEE Standard 1998 is the only international standard dealing with shielding of substations against direct lightning strikes. Other international standards, such as IEC 62305 and AS/ NZS 1768-2007, do not consider lightning protection of HV power systems in their scope.
DESIGN METHODOLOGY
Leader Inception Theory (LIT)
LPI uses the Leader Inception Theory (LIT) for designing lightning protection systems for HV facilities. LIT is one of a number of design methodologies detailed in IEEE Std. 998
The Leader Inception Theory and model was initially presented by Risk (1990,1994) and was expanded for application to structure and substations (Risk 2009,2010).
A fundamental parameter used in the LIT model is the space potential around the object created by the cloud and download leader charges.
COST EFFECTIVE DESIGN
For the 69 kV substation, the LIT methodology requires two (2) lightning protection masts to be installed in optimum locations. The blanket approach applied when using the Rolling Sphere Method (RSM) result in a requirement for five (5) masts.
LPI proprietary software for optional placement and selection of hardware.
ADVANTAGES OF LIT METHODOLOGY
SYSTEMATIC LIGHTNING PROTECTION APPROACH
LPI’s four-step plan for minimising the risk from lightning:
GUARDIAN PLUS AIR TERMINAL RANGE
The new Guardian Plus air terminal range has evolved from the original Guardian CAT design and has been developed after taking into account the latest international research. Key elements include the effect of space charge air terminal geometry, characteristics of long sparks, lightning characteristics and statistics, and the lightning attachment process itself.
GUARDIANS PLUS RANGE
GPLUS-XYY-ZZ |
Example: 69 kV substation in IEEE Std. 998
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brochure_-_guardian_plus.pdf |
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