Method for allowing compressed-air energy storage to participate in primary frequency modulation of power grid

Abstract

The invention discloses a method for allowing compressed-air energy storage to participate in the primary frequency regulation of a power grid. The method comprises a step of setting a primary frequency modulation function module in an expansion generator thermal control system of a compressed-air energy storage system, wherein the primary frequency modulation function module comprises a frequencydifference module, a dead zone module, a difference adjustment module and a limiting module; a step of converting a rotation speed signal n of an expansion generator into a frequency difference by the frequency difference module, comparing the frequency difference by the dead zone module, outputting the frequency difference if the frequency difference is greater than a dead zone, entering the difference adjustment module to calculate and obtain an adjustment load value, finally outputting a load adjustment amount Delta P after the adjustment load value is subjected to maximum adjustment loadvalue limitation by the limiting module, wherein the unit of the rotation speed signal n is r/min, and the unit of the load adjustment amount Delta P is kW. According to the method, the compressed-airenergy storage can participate in the primary frequency regulation of the power grid, the lower limit of the primary frequency regulation adjustment can be canceled according to the characteristics of the compressed-air energy storage and an expander, the adjustment capability of the unit is improved, and the safety and stability of the power grid operation are ensured.

Description

technical field [0001] The invention belongs to the technical field of electric power storage, and in particular relates to a method for compressed air energy storage to participate in primary frequency regulation of a power grid. Background technique [0002] With the increasing scale of new energy power generation, the problems of intermittency, volatility and even anti-regulation of its power generation are becoming more and more prominent. Effective technical solutions are urgently needed to solve the problem of large-scale grid connection of new energy. Large-scale electric energy storage technology is an effective way to solve this problem, and compressed air energy storage system is considered to be one of the most promising large-scale electric energy storage technologies. Small and other advantages. [0003] At present, there are some demonstration projects at home and abroad. my country mainly develops non-supplementary combustion compressed air energy storage. At...

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Problems solved by technology

[0003] At present, there are some demonstration projects at home and abroad. my country mainly develops non-supplementary combustion compressed air energy storage. At present, it mainly studies the thermal system of compressed air energy storage itself. Further research has not been carried out on participating in the peak-shaving and frequency-regulating operation of the power grid, especially the participation in the power grid. There is no relevant literature report on primary frequency modulation in China

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