Evaluation of Minimum Safety Inertia of New Energy Power System Considering Rate of Change of Frequency

2022 12th International Conference on Power and Energy Systems (ICPES) Pub Date : 2022-12-23 DOI:10.1109/ICPES56491.2022.10073462

Weiguo Xia, Zhengfeng Wang, Jiwen Wang, Jialin Guo, Kaipeng Wang, Pingping Han

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引用次数: 1

Abstract

Due to the rapid development of the new energy power system, the increase of new energy permeability, and the grid-connected new energy inverter does not have the inertia support ability, so the frequency stability of the system is seriously affected, and the frequency indicators are gradually close to the safety boundary. In order to solve this problem, this paper first summarizes the inertia index of conventional units, and combs out the effective calculation method of inertia of conventional units. Secondly, this method is extended to the inertia estimation of the new energy power system to evaluate the inertia of the new energy power system. Then, considering the minimum safety inertia evaluation of new energy power system constrained by the rate of change of frequency, the minimum safety inertia coefficient of new energy is defined and taken as the evaluation index. Finally, the IEEE 10-machine 39-node New England Power system model is used to verify the effectiveness of the proposed method.

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考虑频率变化率的新能源电力系统最小安全惯性评估

由于新能源电力系统发展迅速，新能源渗透率增加，并网新能源逆变器不具备惯性支撑能力，因此系统的频率稳定性受到严重影响，频率指标逐渐接近安全边界。为了解决这一问题，本文首先总结了常规机组的惯性指标，梳理出了常规机组惯性的有效计算方法。其次，将该方法推广到新能源电力系统的惯性估计中，对新能源电力系统的惯性进行评估。然后，考虑受频率变化率约束的新能源电力系统最小安全惯性评价，定义新能源最小安全惯性系数作为评价指标;最后，利用IEEE 10机39节点新英格兰电力系统模型验证了所提方法的有效性。

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2022 12th International Conference on Power and Energy Systems (ICPES)

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