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A fast frequency regulation method for new power system considering dynamic allocation of controllable loads
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DOI：10.1063/5.0309499.png)
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Abstract
En 中文
Aiming at the problems of inertia scarcity and insufficient frequency support from high-penetration renewable energy grids, this paper proposes a fast frequency regulation (FR) method considering optimal allocation of voltage-sensitive controllable loads (VSCLs) through power electronics control. First, the maximum FR depth of the controllable load is calculated according to the sensitivity identification method to characterize the load FR capability. Then, the integrated system frequency response model considering source and VSCL is established. On this basis, the FR characteristic parameters satisfying the frequency extremum constraints are calculated according to the frequency change rate of the matching disturbance and sensitivity, thereby constructing an integrated FR characteristic model that considers generation, load, and storage. Further, a load FR power allocation method based on the equal voltage regulation rate is proposed. The method takes the total power of the FR characteristic model as a constraint condition to implement the VSCL power allocation with the objective of optimal voltage deviation regulation. The method requires almost no local communication, alleviating FR pressure on the source and storage sides, and can realize the rapid and effective support for the grid frequency from VSCL and energy storage. Finally, the effectiveness of the proposed method is verified by a simulation comparison of different cases.
Keywords:
MICROGRIDS
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373
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