Low-Frequency Oscillation Suppression Strategy for Power System Based on Supplementary Damping Control of Compressed Air Energy Storage

doi:10.11930/j.issn.1004-9649.202302081

Abstract

Abstract:

With significant increase of penetration of electronic equipment in the power system, the low-frequency oscillation problem of the power system under disturbance are becoming increasingly prominent. Therefore, combined with the good active power regulating ability of compressed air energy storage, a low-frequency oscillation suppression strategy is proposed based on the supplementary damping control of compressed air energy storage. Firstly, a mathematical model of compressed air energy storage is established, and the influence of the mass flow on its output power is analyzed. Secondly, the feasibility of compressed air energy storage to suppress low-frequency oscillation is analyzed, and a supplementary damping controller based on regulating valve is proposed to adjust the mass flow. And then, the output power of the compressed air energy storage is controlled to suppress the low-frequency oscillation of the power grid. Finally, a power system simulation model of 4-generator and two-area with compressed air energy storage is established to verify the effectiveness and feasibility of the proposed method. The simulation results show that the proposed method can provide positive damping for the power grid, and can rapidly suppress the low-frequency oscillation of the power grid and effectively improve the stability of the power system.

Key words: compressed air energy storage, low-frequency oscillation, supplementary damping, regulating valve, mass flow

Kangkang WANG, Xinwei SUN, Bo ZHOU, Tianwen ZHENG, Wei WEI, Libo JIANG. Low-Frequency Oscillation Suppression Strategy for Power System Based on Supplementary Damping Control of Compressed Air Energy Storage[J]. Electric Power, 2023, 56(10): 115-123.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.202302081

https://www.electricpower.com.cn/EN/Y2023/V56/I10/115

Figures/Tables 16

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名称		数值
环境温度 T_en/K		293
储气库温度 T_ac/K		300
储气库最大压力 p_ac/MPa		10
储气库容量 V_ac/m³		26608.47
空气定压比热容比 c_p/(J·(kg·K)^–1)		1000
空气定容比热容比 c_v/(J·(kg·K)^–1)		714
理想气体常数 R_g		287.15
储气库内面积 A_ac/m²		6110.5
充满时储气库空气质量 m_ac/kg		3088800
额定透平功率 P_e/MW		100
额定透平功率的质量流量 Q_e/(kg·s^–1)		286

名称		数值
环境温度 T_en/K		293
储气库温度 T_ac/K		300
储气库最大压力 p_ac/MPa		10
储气库容量 V_ac/m³		26608.47
空气定压比热容比 c_p/(J·(kg·K)^–1)		1000
空气定容比热容比 c_v/(J·(kg·K)^–1)		714
理想气体常数 R_g		287.15
储气库内面积 A_ac/m²		6110.5
充满时储气库空气质量 m_ac/kg		3088800
额定透平功率 P_e/MW		100
额定透平功率的质量流量 Q_e/(kg·s^–1)		286

名称		数值
额定容量 P_n/(MV·A)		100
额定频率 f_n/Hz		50
额定电压 U_n/kV		10
时间常数 H/s		3
阻尼系数 K_D		28
极对数 p		2
内部阻抗 R、X(p.u.)		0.06、0.051

名称		数值
额定容量 P_n/(MV·A)		100
额定频率 f_n/Hz		50
额定电压 U_n/kV		10
时间常数 H/s		3
阻尼系数 K_D		28
极对数 p		2
内部阻抗 R、X(p.u.)		0.06、0.051

名称		数值
增益系数 K_QS		20000
时间常数 T_WQS/s		0.10
时间常数 T_1QS/s		0.63
时间常数 T_2QS/s		0.08