Application of the Exothermic Welding Technology in Substation Grounding Constructions of the Philippines Power Grid
The Philippines climate characterized by rain,air and soil humidity. The special climate and moist soil erosion caused extremely serious threat to the grounding grid security, reliability, and stable operation. In order to ensure the safe operation of the power grids, the technical regulations of the NGCP (the National Grid Corporation of the Philippines) require all the substations grounding grid to use copper metal grounding system. Compared to the steel ground electrode, copper wire has a larger advantage in terms of corrosion resistance, security and electrical. Accumulation based on years of on-site construction technology and operating experience, and this article introduces the experience and recommendations of the grid grounding exothermic welding process applications in NGCP. Especially for the copper stranded aquifer and welding section requires thorough melting and other issues, this article give the proposed welding operating points and technical measures.
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