tailieunhanh - Connection to the MV public distribution network

Tham khảo tài liệu 'connection to the mv public distribution network', kỹ thuật - công nghệ, điện - điện tử phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Chapter B Connection to the MV public distribution network Contents B1 1 Supply of power at medium voltage Power supply characteristics of medium-voltage networks B2 B2 Different types of MV power supply B2 Some practical issues concerning MV distribution networks B3 2 Procedure for the establishment of a new substation B5 Preliminary informations B5 Project studies B6 Implementation B6 Commissioning B6 3 Protection aspect B7 Protection against electric shocks B7 Protection of transformer and circuits B8 Interlocks and conditioned operations B10 4 The consumer substation with LV metering B13 General B13 Choosing MV equipment B13 Choice of MV switchgear panel for a transformer circuit B15 Choice of MV LV transformer B16 Instructions for use of MV equipment B19 5 The consumer substation with MV metering B22 General B22 Choice of panels B24 Parallel operation of transformers B25 6 Constitution of MV LV distribution substations B27 Different types of substation B27 Indoor substation B27 Outdoor substation B29 Schneider Electric - all rights reserved Schneider Electric - Electrical installation guide 2010 1 04 12 2009 1 Power supply at medium voltage B - Connection to the MV public distribution network B2 The main characteristics of an MV power supply are The nominal voltage The short-circuit current The rated current used The earthing system The term medium voltage is commonly used for distribution systems with voltages above 1 kV and generally applied up to and including 52 kV 1 . For technical and economic reasons the nominal voltage of medium-voltage distribution networks rarely exceeds 35 kV. In this chapter networks which operate at 1000 V or less are referred to as low-voltage LV networks whereas networks requiring a step-down transformer to feed LV networks are referred to as medium voltage MV networks. Power supply characteristics of medium-voltage networks