LIGHTING AND EARTHING DESIGN ACCORDING TO IEEE80_2000 AND IEC 62305-2

the project objective to 1. Developing lightning risk assessment software to help the user assess the risk due to all possible effects of lightning strikes to structures according to the risk management method reported in IEC 62305-2. 2. Developing an effective design tool according to IEEE 80-2000 standard to help designers model and build grounding systems that will ensure the performance of power systems and safety of personnel.. Lightning is one of the most beautiful displays in nature but it can have devastating results. Lightning can kill people, destroy properties and cause millions of dollars of damage. Thus protection against this phenomenon is crucial for avoiding such loss. Absolute protection against lightning is impossible but through deployment of a judicious combination of defenses, the lightning protection engineer can attempt to mitigate the lightning consequences. The need for protection, the economic benefits of installing protection measures and the selection of adequate protection measures should be determined in terms of risk management. The IEC 62305-2 standard presents a procedure to assess the risk due to all possible effects of lightning flashes to structures. The risk management procedure described in IEC 62305-2 is rather complicated. It would be useful for lightning protection engineers to have a software tool to carry out this risk assessment. The purpose of substation grounding/earthing is to protect the equipment from efeect of short circite and surges and lightning strikes and to protect the operating persons in the substation. The substation earthing system is necessary for connecting neutral points of transformers and generators to ground and also for connecting the non current carrying metal parts such as structures, overhead shielding wires, tanks, frames, etc. to earth. Earthing of surge is through the earthing system. In this project we developed two software tools. One to perform the tedious risk assessment as described in IEC 62305-2. The other is to assess the safety of the ground grid design as described in IEEE80-2000 standard. Both of them were developed using visual basic and they were proved to be reliable and intuitiv