A United Method for Sensitivity Analysis of the Locational Marginal Price Based on the Optimal Power Flow

Abstract EN

Locational marginal prices (LMPs) are influenced by various factors in the electricity market; knowing the sensitivity information of LMPs is very important for both the purchase and the consumer.

This paper presents a united method to compute the sensitivities of LMPs based on the optimal power flow (OPF).

The Karush-Kuhn-Tucher (KKT) system to solve LMPs can be transferred into an equation system by using an NCP function, and then by using the properties of the derivative of the semismooth NCP function, this paper provides a simultaneous obtention of the sensitivities of LMPs with respect to power demands, the cost of production, voltage boundary, and so forth.

Numerical examples illustrate the concepts presented and the proposed methodology by a 6-bus electric energy system.

Some relevant conclusions are drawn in the end.