• ADDRESS

    #42 Marcela St., Damong Maliit, Brgy. Nagkaisang Nayon, Novaliches, Quezon City 1125, Metro Manila, Philippines

  • CONTACT

     E-Mobility Department
    0939-903-9083

    Electrical and Sales Department
    0917-851-0614

    All Department
    8398-1877

    Sales Inquiry: sales [at] pesin.com.ph 

     

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

  • The model is backed decades of experimental results from long-spark testing in high voltage laboratories
  • Validation against rocket-triggered and natural lightning experiments
  • Site-specific design calculation customized to suit individual projects.
  • Sound scientific basis which results in substantial efficiencies in designs, with excellent cost benefits

SYSTEMATIC LIGHTNING PROTECTION APPROACH

LPI’s four-step plan for minimising the risk from lightning:

  1. Protect assets from direct strikes by intercepting lightning and conducting it to ground safely (air terminals and downconductors).
  2. Dissipate the lightning current into a bonded earthing system (earthing and bonding).
  3. Protect incoming power lines (surge protection).
  4. Protect incoming signal, data and communication lines (surge protection).

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.

  • The design of the Guardian Plus air terminals is based on detailed modelling and calculations which optimise corona performance in the quasi-static phase of a thunderstorm
  • Three domes sizes to cater for all practical installation scenarios
  • Tip radius of curvature and tip protrusion is optimised to minimise corona charge
  • Robust materials to achieve long service life

 

GUARDIANS PLUS RANGE
LPI offers Guardian Plus terminals in both anodised aluminum and stainless steel. 

GPLUS-XYY-ZZ
X:
 Guardian Plus terminal model. Model 1,2 or 3.
YY: G for gold (anodised aluminum) model, SS for stainless steel model.
ZZ: IM for insulated mast (use with FRP mast and HVSC Plus) CM for conductive mast (2 inch BSP GI pipe adaptor).
Contact LPI or an authorized distributor for further details.

 

Example: 69 kV substation in IEEE Std. 998

Brochure Registration

Registration