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

摘要

The invention relates to a method and to a device for the energy management of a system having a number of components according to an economic market model approach. At least one of the components is characterized by a non-monotonic price-performance or price-power relation. By taking into consideration the non-monotonic price-performance or price-power relation, a realistic description of the at least one component is provided and thus used to improve energy management of the system.

主权项

1. A method for the energy control of a system, wherein the system comprises a number z of components which comprise at least: one number e of energy sources Qa and a number f of loads Lb, where: aε1, 2, . . . , a1; bε1, 2, . . . , b1; z=a1+b1 and j, tε1, 2, . . . , z; with the following steps:
1.1. assigning an individual price-power relation PRj to each of the z components of the system, which assigns prices to power delivered or received by the respective jth component, wherein each one of the price-power relations PRj is represented by a curve kj, in which power values mj delivered or received by the respective jth component are plotted above price values pj, wherein at least one such price-power relation PRj=t is represented by such a non-monotonic curve kt*, and all additional price-power relations PRj≠t are represented by such monotonic curves kj≠t, 1.2. approximating the non-monotonic curve kt* by a first monotonic approximation curve Kn=1,t, which thus represents a first monotonic approximation relation Nn=1(PRj=t) for the non-monotonic price-power relation PRj=t, wherein n is a step counter, 1.3. on the basis of the z price-power relations PRj, wherein the first monotonic approximation relation Nn=1(PRj=t) is used instead of the price-power relation PRj=t, determining a first equilibrium price pn=1 and an assigned equilibrium power mn=1 for the system, 1.4. approximating the non-monotonic curve kt* by an additional monotonic approximation curve Kn+1,t, which thus represents an (n+1)th monotonic approximation relation Nn+1(PRj=t) for the non-monotonic price-power relation PRj=t, 1.5. on the basis of the z price-power relations PRj, wherein the approximation relation Nn+1(PRj=t) is used instead of the price-power relation PRj=t, determining an (n+1)th equilibrium power mn+1 and an assigned equilibrium price pn+1 for the system, 1.6. repeating steps 1.4. and 1.5. for the iterative determination of the approximation relation Nn+1(PRj=t), which satisfies a predetermined best match criterion, 1.7. controlling the power output of individual or all of the energy sources Qa of the system on the basis of a current predetermined energy demand of the loads Lb, and a current equilibrium power mn+1, and a current equilibrium price pn+1 determined on the basis of the approximation relation Nn+1(PRj=t).