The control strategies concerning the new type inertia flywheel and high-speed flywheel involved in the grid inertia response and primary frequency modulation

doi:10.19799/j.cnki.2095-4239.2024.0844

Abstract

Abstract:

Aiming at the complex control problem wherein a hybrid flywheel array composed of an inertia flywheel and a high-speed flywheel participates in grid inertia response and primary frequency modulation, this paper first introduces the concepts of magnetic suspension inertia flywheel and high-speed flywheel energy storage, as well as the architecture and working mechanism of the inertia flywheel array and high-speed flywheel array that participate in grid inertia response and primary frequency modulation. Secondly, the mathematical and control models of the flywheel energy storage system are established, and two control strategies are proposed: one is a collaborative control strategy based on inertia control and sag control, involving the inertia flywheel and high-speed flywheel array in grid inertia response and primary frequency modulation; the other is a control strategy based on inertia response and primary frequency modulation, respectively. Through simulation, the frequency modulation effects of the two control strategies are compared in terms of frequency change, frequency change rate and recovery time. The simulation results verify the correctness and feasibility of the two strategies, and they exhibit different advantages in the inertia response and primary frequency modulation stages.

Key words: flywheel energy storage, inertia flywheel, inertial response, primary frequency modulation, sag control, inertial control

CLC Number:

TM 761

Wenqi DONG, Donghui ZHANG, Yifan CAO, Zhaoxuan NING, Xinjian JIANG, Ming LI, Xuewei SHI. The control strategies concerning the new type inertia flywheel and high-speed flywheel involved in the grid inertia response and primary frequency modulation[J]. Energy Storage Science and Technology, 2025, 14(3): 1224-1233.

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参数	数值
额定功率/MW	1
额定电压/V	690
电机相数	6
定子相电阻/mΩ	1
定子绕组d轴电感/mH	0.07
定子绕组q轴电感/mH	0.15
永磁体磁链/Wb	0.28
转速范围/(r/min)	5000~10500

参数	数值
额定功率/MW	1.5
额定电压/V	690
极对数	2
定子电阻/mΩ	5.5
转子电阻/mΩ	6.21
定子漏感/mH	0.156
转子漏感/mH	0.226
互感/mH	11.01

参数	数值
电网容量/MW	200
高速飞轮台数	10
惯量飞轮台数	10
高速飞轮阵列容量/MW	10
惯量飞轮阵列容量/MW	15
高速飞轮初始转速/(r/min)	7000
惯量飞轮初始转速/(r/min)	1400

调频指标	基于惯性控制和下垂控制的协同控制策略	惯性响应与一次调频分别调节的控制策略
最大频率变化量/Hz	-0.26	-0.30
最大频率变化率/(Hz/s)	-0.57	-0.66
恢复时间/s	6.9	4.5

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