Demonstration applications in wind solar energy storage field based on MW flywheel array system

doi:10.19799/j.cnki.2095-4239.2021.0617

Abstract

Abstract:

According to the energy storage demands of short term and high frequency in the wind solar new energy grid, this paper focuses on the demonstration application researches of the MW flywheel array in the wind solar energy storage field. In this paper, the system composition and topological structure of the flywheel array are firstly introduced as well as the working principle. On this basis, the system design of the flywheel energy storage array is provided. Finally, the real experimental tests by using the actual flywheel array system is developed in Tianjin and Qinghai wind solar energy storage field. After thousands of the charging-discharging cycle experiments, it can be shown that the designed flywheel system stays stable and reliable. Owing to the significant advantages, the total power, capacity and response characteristics can meet the requirements of the new energy frequency adjustment process.

Key words: wind solar new power, energy storage demands of short term and high frequency, MW flywheel energy storage array, charge-discharge experimental tests

CLC Number:

TM 341

Shusheng LI, Jialiang WANG, Guangjun LI, Dachun WANG, Yadong CUI. Demonstration applications in wind solar energy storage field based on MW flywheel array system[J]. Energy Storage Science and Technology, 2022, 11(2): 583-592.

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参数	性能
额定功率，P_N/kW	250
最大储电量，E_N/(kW·h)	50
工作转速范围，n_N/(r/min)	3000～7200
机侧电压范围，V_N/V	0～480
机侧电流范围，I_N/A	0～800
最大放电深度/%	80
最大放电时间，T_dis/min	9
直流侧电压范围，U_dc/V	600～800
直流稳压精度/%	≤±2
直流侧充放电循环效率，?_N/%	≥90
充放电响应时间，t_r/ms	≤20
充放电转换时间，t_s/ms	≤40

参数	性能
额定功率，P_N/kW	250
最大储电量，E_N/(kW·h)	3
工作转速范围，n_N/(r/min)	4000～10500
机侧电压范围，V_N/V	0～400
机侧电流范围，I_N/A	0～1000
最大放电深度/%	85
最大放电时间，T_dis/s	36
直流侧电压范围，U_dc/V	600～800
直流稳压精度/%	≤±2
直流侧充放电循环效率，?_N/%	≥90
充放电响应时间，t_r/ms	≤20
充放电转换时间，t_s/ms	≤40