Power system frequency response analysis method considering frequency space distribution

Abstract

The invention discloses a power system frequency response analysis method considering frequency space distribution, which analyzes the distribution law of system imbalance power among units and reaches a conclusion that the imbalance power distribution comprises two processes of impact distribution and inertia distribution. The distribution law of the system imbalance power among units is realized, a conclusion is reached that the imbalance power distribution mainly comprises two processes of impact distribution and inertia distribution, and a simplified admittance matrix is adopted to realize the above two distribution processes. As is shown by simulation analysis, the method can effectively reflect influences brought to the frequency by the unit distribution features and the change relation between the system frequency and the active power. On the premise of ensuring high calculation precision, the calculation efficiency is greatly enhanced compared with the existing model and the method can be used for large-scale system long-time dynamic frequency analysis.

Description

technical field [0001] The invention relates to the technical field of power system frequency response analysis, in particular to a power system frequency response analysis method considering frequency space distribution. Background technique [0002] Frequency is an important index to measure the safety of the power system, and the next frequency adjustment is particularly important in the absence of high power [1,2] , an accurate and effective simulation model about primary frequency modulation is needed in the research. [0003] In the current research related to frequency regulation, the widely used single-machine or multi-machine with concentrated load model aggregates the equivalent value of the whole network generator into a single-machine model, adopts a unified central frequency and a complete or simplified prime mover-governor model, but does not Considering the system network structure, the frequency change can be quickly estimated. However, the system frequency...

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Problems solved by technology

However, there is no essential difference between it and the full-state model in terms of overall structure and calculation process, and the improvement of simulation efficiency is limited. When dealing with the analysis of primary frequency regulation of large-scale power grids, especially when considering the coordination of primary frequency regulation and secondary frequency regulation, the analysis time is relatively long ( tens of seconds to ten minutes), its simulation efficiency is slightly insufficient

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