A modeling method and system for evaluating the aggregated frequency modulation performance of distributed energy storage systems

Abstract

The present invention provides a modeling method and system for evaluating the aggregated frequency modulation performance of a distributed energy storage system. The method and system determine the grid aggregation target and calculate the response factor of each distributed energy storage unit of the distributed energy storage system to grid aggregation frequency regulation, combined with the preset constraints of the distributed energy storage system and the grid, using particles The swarm algorithm performs optimization calculations on the pre-established power grid objective function to determine the best aggregated frequency modulation scheme for the distributed energy storage systems connected to the power grid, and then uses the simulation model to match the connected distributed energy storage systems according to the pre-set model. The economics of the front and rear power grids are simulated and analyzed to evaluate the frequency regulation performance of the distributed energy storage system after it is connected to the power grid. By optimizing the output of the distributed energy storage system, the method and system realize timely processing of frequency problems existing in the power grid, prevent the occurrence of large-scale cascading failures, and give full play to the application of the distributed energy storage system. potential.

Description

technical field [0001] The present invention relates to the technical field of distributed energy storage, and more specifically, to a modeling method and system for evaluating the aggregation frequency modulation performance of a distributed energy storage system. Background technique [0002] Compared with centralized energy storage, distributed energy storage has the advantages of small investment, flexible application, and small loss in the station. However, distributed energy storage also has problems such as scattered output, poor controllability, and lack of corresponding scheduling methods. At present, most of the research on energy storage frequency regulation focuses on large-scale centralized energy storage frequency regulation. For distributed energy storage devices, a complete and mature frequency regulation aggregation strategy has not yet emerged. With the increase in the scale of distributed energy storage devices installed on the grid side year by year, Dist...

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Problems solved by technology

At present, my country's electricity market is still in its infancy. Although some provinces are optimizing and promoting ancillary services based on the "two detailed rules", their market price mechanism is still absent. Ancillary service providers, supply methods, transaction rules, fee standards, payment and The settlement method has not yet been perfected, so it is difficult to take into account the difference in the cost of ancillary services provided by different power plants, and it is also difficult to distinguish the difference in the quality of ancillary services

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