摘要
独立的光伏发电系统不依赖大电网,特别适合解决偏远地区轨道交通的牵引供电问题,还能降低牵引能耗,实现铁路系统的节能减排。与此同时,储能系统作为新能源发电的补充,得到了广泛应用。故针对混合储能的轨道交通车辆段微网的拓扑结构,文中提出了一种稳压控制策略,保证微网在列车负荷波动与光伏阵列波动时的稳定运行。储能控制采用影响因子K_(SOC)的电压闭环控制、切换因子K_(SWITCH)的电压闭环控制、功率环控制的储能控制策略,实现储能与微网的传输功率可控。光伏端口利用基于功率控制的改进扰动观察法来保证光伏组件功率可控。逆变器采用电压电流双闭环控制,以保证端口始终能够输出符合电能质量要求的电压。在Matlab/Simulink平台中搭建仿真模型验证了所提策略的可行性,直流母线的电压指标均符合要求。
The independent photovoltaic power generation system does not rely on the large power grid,which is particularly suitable for solving the traction power supply problem of railway in remote areas.It can also reduce the traction energy consumption and realize the energy saving and emission reduction of railway system.At the same time,energy storage system as a supplement to new energy power generation has been widely used.Therefore,based on the topology structure of the rail transit depot microgrid for hybrid energy storage,a voltage stabilization control strategy is proposed for the stable operation of microgrid under train load fluctuation and photovoltaic array fluctuation.The voltage closed⁃loop control with influence factor K_(SOC),the voltage closed⁃loop control with switching factor K_(SWITCH) and the energy storage control strategy of power loop control are adopted to realize the controllable transmission power of energy storage and microgrid.The photovoltaic port adopts the improved perturbation and observation method based on power control to ensure that the power of the photovoltaic port is controllable.The double closed⁃loop control is adopted to ensure that the port can always output high quality voltage.A simulation model is built on the Matlab/Simulink platform to verify the feasibility of the proposed strategy,and the DC bus voltage indicators meet the requirements.
作者
余刚
YU Gang(China Railway Electrification Engineering Group Co.,Ltd.,Beijing 100036,China)
出处
《电子设计工程》
2022年第22期158-164,共7页
Electronic Design Engineering
关键词
轨道交通
混合储能
双闭环控制
稳压控制
rail transit
hybrid energy storage
double closed⁃loop control
voltage⁃stabilizing control
