计及储能调节的时滞互联电力系统频率控制

doi:10.16183/j.cnki.jsjtu.2022.145

摘要/Abstract

摘要：

针对互联电力系统中源荷不确定以及通信延时导致系统频率偏差过大的问题,提出了计及储能调节的两域时滞电力系统频率控制策略.建立了含汽轮发电机、风机和储能等设备的两区域时滞互联电网模型,根据区域控制偏差(ACE) 所在的区间对储能装置和汽轮发电机的调频任务进行分工.利用改进粒子群(MPSO)算法优化比例积分微分(PID)负荷频率控制器实现二次调频,提升了一定时滞区间内负荷频率控制(LFC)系统的频率稳定性.对储能装置设计分数阶PID(FOPID)控制器,调节其输出功率以平滑源荷波动,提高了储能系统的辅助调频性能,进一步控制互联电力系统的频率偏差.在MATLAB/Simulink平台对不同工况进行对比分析,验证了所提频率控制策略的有效性.

关键词: 负荷频率控制, 储能装置, 时滞互联电力系统, 改进粒子群算法, 分数阶比例积分微分

Abstract:

Aimed at the problem of large frequency deviation caused by the source load uncertainty and the communication delay in the interconnected power system, a frequency control strategy for interconnected power systems with time-delay considering energy storage regulation is proposed. An interconnected power grid model with time delay which includes a steam turbine generator, a wind turbine generator, and energy storage equipment is established. According to the area control error (ACE), the energy storage device coordinates the steam turbine generator to participate in the frequency control, and the modified particle swarm optimization (MPSO) algorithm is used to optimize the proportional integral derivative (PID) load frequency controller to realize the secondary frequency adjustment, which improves the frequency stability of the load frequency control (LFC) system in a certain time-delay interval. A fractional order PID (FOPID) controller is designed for the energy storage device to adjust the output power and smooth the source load fluctuation. The frequency control performance of the energy storage system is improved to further control the frequency deviation of the interconnected power system. Different working conditions are compared and analyzed on the MATLAB/Simulink platform to verify the effectiveness of the proposed frequency control strategy.

Key words: load frequency control (LFC), energy storage device, time-delay interconnected power system, modified particle swarm optimization (MPSO), fractional proportional integral derivative (FOPID)

中图分类号:

TM76

符杨, 丁枳尹, 米阳. 计及储能调节的时滞互联电力系统频率控制[J]. 上海交通大学学报, 2022, 56(9): 1128-1138.

FU Yang, DING Zhiyin, MI Yang. Frequency Control Strategy for Interconnected Power Systems with Time Delay Considering Optimal Energy Storage Regulation[J]. Journal of Shanghai Jiao Tong University, 2022, 56(9): 1128-1138.

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参数	区域1	区域2
电力系统增益, K_p_i	120	166
电力系统时间常数, T_p_i/ s	20.2	33.3
发电机时间常数, T_t_i/ s	0.3	0.25
调速器时间常数, T_g_i/ s	0.08	0.1
调差系数, R_i	2.5	2.22
频率偏差系数, β_i	0.425	0.456
联络线功率系数, T_ij	0.272	0.272