September 2014
Intermediate to advanced
432 pages
14h 16m
English
Content preview from The Economics of Electricity Markets
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7Efficient Dispatch of Generation and Consumption Resources in the Presence of Network Congestion
In Chapter 6, we showed how we can express the physical limits of an electricity network as a set of linear constraint equations. In this chapter, we introduce these constraint equations into the optimal dispatch task to find the combination of production and consumption that maximises economic welfare subject to the physical constraints of the network.
7.1 Optimal Dispatch with Network Constraints
Previously, we defined the net injection of electric power at a node as the total production of producers at that node less the total consumption of consumers:
Using the benefit function introduced in Section 4.6 and the set of linear constraints derived from the DC Load Flow model introduced in Section 6.2, ignoring losses, the optimal dispatch problem can be written as follows:
subject to
- The energy balance equation
and - The generic network constraints
Recall that node N is chosen to be the reference node ( for all links l).
The KKT conditions for this constrained optimisation problem ...
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