Hello. I want to know about the the difference between switch placement in the beginning of a section and the end of that section in distribution system? What is its effect on reliability of system ?
Thanks.
Your switch placement may be forced on you by the distances involved (signal power decaying over distance etc), but other considerations might include routing from the switch, failover pathways etc. A simple view point might be had from asking what effect would occur if there was a break in the section concerned? Another might be to consider that a switch would not send un-necessary traffic over the section, so which end needs protecting most? Do these considerations have any effect on your case?
Hello. and thanks about your concern. The problem is solved.
Sorry for taking your time.
There are two types of switching :
- Section Switch (SS) is used to sectioning the primary source(substation that is connected to the feeder) of the system in case of fault downstream or used to sectioning the alternative source(transference of load to other feeders) in the case of fault upstream.
- Tie Switch (TS) provides a different path to other feeder and is used for upstream faults.
·SS is allocated at their beginning and a group of sections where TS is allocated at their end node. TS is sometimes allocated downstream of more than one SS. This occurs when the line section sections that contain SS belong to the same set of line sections that start at the substation and end on the terminal node.
the following figure shows this action.
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