LIGHTNING PROTECTION SYSTEMS IN LOW VOLTAGE SYSTEMS AND ELECTRONIC EQUIPMENT AT HIGH VOLTAGE SUBSTATION

• Main Author: Nugraha, Adi
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/52279
• Institution: Institut Teknologi Bandung

Lightning is one of the most common sources of electromagnetic interference that can damage electrical equipment [1]. Electrical power systems that are exposed to overvoltages from different sources such as lightning can endanger equipment such as transformers, circuit breakers, etc. [2]. In addition, excessive voltage caused by lightning strikes, earthing, or switching activities on an ongoing basis can endanger the insulation of electrical equipment used in distribution systems and transmission systems [3]. Lightning can strike the protective wire at the top of the tower, besides that lightning can also strike the transmission line (Hayashi, Mizuno and Naito, 2008). On the other hand, indirect strokes can produce an induced voltage in the equipment [3]. Research on lightning disturbances was carried out at Gsardu Induk Menes Baru 150 kV, located on Jl. Independence Pioneer No. KM. 3.5 Caringin, Labuan, Pandeglang Regency, Banten Province. The position of the Menes Baru GI is about 500 m on the shoreline so that the updraft is very high. In making participatory observations, the authors collect data on the characteristics of lightning, data on damage to the control unit due to lightning, and other supporting data. On March 15, 2020 there was a disruption in the distribution system to PT Asahi mas 2. The channel to PT Asahimas uses 2 x 410 mm2 TACSR conductors. Another disturbance occurred on April 21, 2020, the same disturbance occurred, namely the disturbance that caused reclose at the PMT 150kV Labuan 1 operating. The protection in the control building has the potential for interference due to conduction through the channel. External lightning protection still needs additional improvements, especially in the use of down conductors and grounding. The grounding tower and the control building should not be separated, but united