Starting of large compressor motors on a weak grid - Case study

This paper presents case studies of different starting methods of large compressor motors on remote locations where the grid is not strong enough to be able to start the motors Direct On-Line (DOL). Some criteria based on common practice have been presented. Following these criteria and making some rough calculations it is easy to anticipate how the installation will look like, what the grid influence will be and how that will affect the cost of electrical installation of a large driven compressor.