{"id":2146,"date":"2024-07-19T18:33:39","date_gmt":"2024-07-19T13:03:39","guid":{"rendered":"https:\/\/study.madeeasy.in\/?p=2146"},"modified":"2025-07-16T15:16:49","modified_gmt":"2025-07-16T09:46:49","slug":"bus-classification","status":"publish","type":"post","link":"https:\/\/www.madeeasy.in\/study\/ee\/power-systems\/bus-classification","title":{"rendered":"BUS Classification"},"content":{"rendered":"

In a power system each node or bus is associated with four quantities, such as magnitude of voltage, phase angle of the voltage (\u03b4), active or true power (P) and reactive power (Q). In a load flow problem two out of these four quantities are specified and the remaining two are required to be determined through the solution of equations. Depending upon which quantities have been specified, the buses are classified into three categories.<\/p>\n

Slack bus\/Swing Bus\/Reference Bus<\/strong><\/h2>\n

One of the generation buses in a power system is chosen as slack or swing bus. At this bus, voltage magnitude |Vi| (usually set to 1 pu) and voltage phase angle \u03b4i (usually set to 0\u00b0). The active and reactive powers at this bus are to be determined through the solution of equations. If slack bus is not specified, the generation bus usually with maximum active power P is taken as reference bus.<\/p>\n

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