Calculation of the critical inertia of a power system considering frequency security constraints

被引：0
|
作者：
Yi P. [1 ]
Jing Z. [2 ]
Xu F. [1 ]
Chen L. [1 ]
Qi J. [2 ]
Jiang X. [2 ]
Gao X. [2 ]
机构：
[1] Department of Electrical Engineering, State Key Laboratory of Control and Simulation of Power Systems and Generation Equipment, Tsinghua University, Beijing
[2] Inner Mongolia Electric Power (Group) Co.Ltd, Hohhot
来源：
Qinghua Daxue Xuebao/Journal of Tsinghua University | 2022年 / 62卷 / 10期
关键词：
adjusting power constraints; construct frequency difference curve; critical inertia; frequency safety constraint; the rate of change of frequency constraint;
D O I：
10.16511/j.cnki.qhdxxb.2022.21.013
中图分类号：
学科分类号：
摘要：
With the large-scale access of new energy to the power grid,the inertia of the power system gradually decreases,and the system frequency security is seriously threatened.In this study, "critical inertia" is used to quantify the minimum inertia required to maintain system stability after a critical failure.First,an analytical frequency safety calculation method is proposed.By constructing the frequency difference curve,the calculation formula of the frequency safety constraint is obtained based on the average system open-loop model.Then,based on the frequency safety constraint,the rate of change of frequency constraint (RoCoF),and the unit regulation power constraint,the calculation of the system-critical inertia is transformed into the solution of the optimization problem.Finally,the simulation system is used to verify the effectiveness and accuracy of the critical inertia calculation method in this study.The simulation results show that the larger the adjustable power range of the unit is,the smaller the critical inertia becomes.By increasing the standby capacity of the unit,the critical inertia of the system can be reduced. © 2022 Press of Tsinghua University. All rights reserved.
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页码：1721 / 1729
页数：8
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