Abstract
Suppose one of our choices is to use a 400 kV line with 1/5 per unit reactance and 1/16 per unit resistance (per km) of the respective values of an available 230 kV line. In terms of the susceptance, it is assumed that B of the 400 kV line is 2.5 times that of the 230 kV line. Moreover assume that its thermal capacity is three times higher than that of the 230 kV line.
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Notes
- 1.
Upgraded from the earlier 400 kV line with a lower capacity to a higher capacity type.
- 2.
This type of substation is normally referred to a switching substation.
- 3.
In terms of connecting lines in various voltages, voltage upgrading of existing substations, expansions of existing substations by adding new transformers, etc.
- 4.
It represents the costs of land, protection systems, etc. which obviously depend on the voltage involved.
- 5.
The reader may follow other alternatives. However, they may only be applied for small scale systems.
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The references of this chapter are same as the references of Chap. 8. Reference [1] is the typical reference of most transmission planning studies. Reference [2] reviews the research up to 2003. Test models are covered in [3]. Some mathematical based approaches are given in [4], [5–8]. Non-mathematical based algorithms are quite a few. Some are introduced in [9–12]. Some of these are compared in [13]. If the transmission system comprises of several voltages; the substation configuration is to be determined in combination with transmission network; GEP and TEP are to be analyzed together or a multi-year approach is to carried out, the problem becomes more complex. Some of these issues are covered in [14–17].
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Seifi, H., Sepasian, M.S. (2011). Network Expansion Planning, an Advanced Approach. In: Electric Power System Planning. Power Systems. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-17989-1_9
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DOI: https://doi.org/10.1007/978-3-642-17989-1_9
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