Simulation of the primary frequency modulation process of wind power with an auxiliary flywheel energy storage

doi:10.19799/j.cnki.2095-4239.2022.0489

Abstract

Abstract:

With increasing wind power, the frequency stability of power systems is getting increasingly serious. The impact of primary frequency control supported by flywheel energy storage is examined through Matlab/Simulink simulation under certain wind power penetration. First, the simplified linear frequency control is used to establish the primary frequency regulation control model of the flywheel energy storage auxiliary wind power, and the frequency characteristics of the flywheel energy storage participating in primary frequency regulation are analyzed in accordance with the transfer function. Then, the frequency characteristics of a regional power grid in the case of step and continuous disruptions of load power were examined. Comparatively, it was found that a certain proportion of flywheel energy storage systems could quickly react to the frequency deviation signal, and the maximum frequency and steady-state deviations of the system are reduced in the primary frequency modulation simulation process, which meets the performance index requirements of the power system and significantly enhances the frequency quality of wind power.

Key words: flywheel energy storage, wind power, frequency characteristics, primary frequency modulation

CLC Number:

TM 73

Juntao CHEN, Yajun WANG, Shunyi SONG, Wenhao QU, Yibing LIU. Simulation of the primary frequency modulation process of wind power with an auxiliary flywheel energy storage[J]. Energy Storage Science and Technology, 2023, 12(1): 172-179.

Figures/Tables 12

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性能指标	标准
频率变化率幅值/(Hz/s)	<0.5
频率低谷/高峰时频率偏移/Hz	<0.2
稳态频率/Hz	49.8～50.2
一次调频投入时间/s	<20

参数	数值
M/s	12
D	0.01
R/pu	0.05
a/s	0.333
T/s	6
K_W/K_F	25
T_W /s	1.5
T_F/s	0.03

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