A New Evaluation Method for Minimum Inertia Requirements of Power System
With the increasing proportion of new energy power generation,the decrease of system inertia level becomes a key issue,and the lower inertia level deteriorates the system frequency stability,so it is necessary to evaluate the minimum inertia requirement of the system in order to increase the new energy output as much as possible.In this paper,the mathematical relationship of frequency response is constructed by studying the characteristics of frequency dynamic response,and the calculation method of evaluating the minimum inertia demand of the system by considering the frequency rate of change constraint and the frequency minimum point constraint at the same time is proposed,which is verified in the simulation in the IEEE39 node model,and the results show that the difference between the minimum inertia demand calculated in the proposed method and the simulation results is small,which verifies the accuracy and validity of the proposed method,and provides a good solution for the minimum inertia demand of new energy power system.The results show that the difference between the minimum inertia demand calculated by the proposed method and the simulation results is small,which verifies the accuracy and validity of the proposed method and provides a method for the assessment of the minimum inertia demand of the new energy power system.
Frequency dynamic responseMinimum inertiaFrequency rate of changeFrequency nadir
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