Multi-zone automatic generation control coordination method based on differential game theory

Abstract

The invention discloses a multi-zone automatic generation control coordination method based on the differential game theory. The method comprises the following steps: step 1, a dynamic model of zone interconnected network automatic generation control (AGC) is established; step 2, traditional AGC amount based on a proportion integration link is replaced by AGC amount based on the differential game theory and a coordination control model, based on the differential game theory, of zone interconnected network automatic generation is established; step 3, the coordination control model of the zone interconnected network automatic generation is solved through the linear quadratic type differential game theory and the obtained Nash equilibrium strategy serves as automatic generation control amount of multiple zones; and step 4, compared with other existing control methods, the multi-zone automatic generation control coordination method based on the differential game theory enables distribution of frequency modulation among the zones to be fair and convictive. The multi-zone automatic generation control coordination method based on the differential game theory has the advantages of being strong in robustness and the like.

Description

Technical field [0001] The invention relates to an automatic control of a power system, in particular to a multi-zone automatic power generation control coordination method based on differential game theory. The control coordination method is suitable for large-scale grid connection of intermittent power sources such as wind power, and more and more tie lines will appear. In the case of more inter-regional power support, how to formulate a fair and just coordinated operation plan. Background technique [0002] Automatic generation control (AGC), as an important means to ensure the stability of grid frequency, has been studied in depth for a long time. These studies are based on optimal control, adaptive control, robust control, artificial intelligence and other methods to improve the ability of AGC to track load changes and respond to system parameter changes. However, there are relatively few studies on multi-region AGC coordinated operation mechanisms. At present, China's regi...

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Problems solved by technology

The paper [2] uses the multi-objective optimization method based on linear weighting to obtain the optimal frequency deviation coefficient for the set target, so as to allocate the adjustment power of each area, but the artificially set weight coefficient cannot guarantee the fairness among the areas.

The paper [3] points out that it is urgent to coordinate the game in the frequency regulation process after the wind power is connected to the grid, and proposes the development route of the AGC coordination mode with hierarchical coordinated control as the transition and centralized control of the whole network as the goal, but does not give specific regional regulation power allocation method

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