Energy management of a system according to an economic market model approach

摘要

The invention relates to a method and apparatus for energy management of a system according to an economic market model approach, the system comprising a number z of components comprising at least: a number e of energy sources Qa and a number f of loads Lb, with: a ∈ 1, 2, ..., a1; b ∈ 1, 2, ..., b1; z = a1 + b1 and j, t ∈ 1, 2, ..., z. The method according to the invention comprises the following steps: associating an individual price-performance relation PRj with each of the z components of the system which assigns prices to services given or received by the respective j-th component, each of the price-performance relations PRj being represented by a curve kj in which power values lj output or recorded by the respective jth component are plotted against price values pj, whereby at least one such price-power relation PRj = t is represented by a non-monotone such curve kt *, and all further price-performance relations PRj ≠ t are approximated by monotone such curves kj ≠ t, approximating the non-monotone curve kt * by a first monotone approximation curve Kn = 1, t, thus providing a first monotone approximation relation Nn = 1 (PRj = t) for the non-monotone price-performance relation PRj = t represents, based on the z price-performance relations PRj, where instead of the price-performance gsrelation PRj = t the first approximate relation Nn = 1 (PRj = t) is used, determining a first equilibrium price pn = 1 and an associated equilibrium power ln = 1 for the system, approximating the nonmonotonic curve kt * by another monotone approximation curve Kn + 1, t, which thus represents an n + 1-th monotone approximation relation Nn + 1 (PRj = t) for the non-monotone price-power relation PRj = t, based on the z price-performance relations PRj, where instead of the price-performance relation PRj = t the approximate relation Nn + 1 (PRj = t) is used, determining an n + 1th equilibrium power ln + 1 and an associated equilibrium price pn + 1 for the system, repeating steps 1.4. and 1.5. for iteratively determining an approximate relation N n + 1 (PRj = t) that satisfies a predetermined best-match criterion, controlling individual or all components of the system based on a given energy requirement of the loads Lb, and based on the approximate relation N n + 1 (PRj = t), determined equilibrium power l n + 1 and the equilibrium price p n + 1.