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- W18968116 abstract "-Electric utility companies and/or government agencies, as well as professional organizations such as IEEE, are formulating interconnection requirements for connecting small distributed or dispersed-resource generation to large utility systems. “Small” typically implies generators up to 30 MW. If the small generator is connected to the distribution system, as is normally the case, then the distribution system will no longer be radial, which requires changes to the protection. Some of the protection-related problems are inadequate coordination, energization with generators out of synchronism, transfer tripping, protection against formation of unintentional islands, overvoltages, etc. This paper discusses transient studies made for the connection of an Independent Power Producer (IPP) to a 138 kV connection point. The results show the overvoltages that can result from outof-step reclosing after a line-to-line fault with ground connection on the transmission line. Solutions are suggested to prevent sustained overvoltages with revised underand overvoltage settings. The proper choice of surge arresters is discussed as well. If the IPP is connected to a distribution system of 13.8 kV, 25 kV or 34.5 kV, the grounding of the neutral of the transformer at the connection point (point of common coupling) will influence the current distribution between the utility and IPP. This will affect the sensitivity of the neutral protection relays." @default.
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- W18968116 date "2007-01-01" @default.
- W18968116 modified "2023-09-27" @default.
- W18968116 title "Overvoltage Problems of Small-Scale Generators Connected to Large Systems" @default.
- W18968116 hasPublicationYear "2007" @default.
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