储能双向响应系统中双向变流器闭环稳定性建模  

Closed-loop Stability Modeling of Bi-directional Converter in Bi-directional Energy Storage Response System

作　　者：李波 杨永标 LI Bo;YANG Yongbiao(Power Dispatching Control Center,Guangdong Power Grid Co.Ltd.,Guangzhou 510600,China;Southeast University,Nanjing 210000,China)

机构地区：[1]广东电网有限责任公司电力调度控制中心,广东广州510600 [2]东南大学,江苏南京210000

出　　处：《工业加热》2022年第11期38-42,共5页Industrial Heating

基　　金：南方电网公司科技项目资助(GDKJXM20212079)。

摘　　要：双向变流器作为储能系统中关键电器设备,其闭环控制效果直接影响储能效率与系统稳定性。基于此,提出储能双向响应系统中双向变流器闭环稳定性建模。根据双向变流器工作原理,设计智能充电方式,定义单级性二值逻辑开关函数。根据等幅式变换原理,将三相静止坐标转化为两相静止坐标,获取电路数学表达式。基于典型的电压外环闭环控制模型,计算原回路开环传递函数,修正原储能系统传递函数,使系统最终满足稳定性要求。仿真结果表明,该方法可以输出较为平稳的电压波形,确保储能系统稳定高效工作。As the key electrical equipment in energy storage system,the closed-loop control effect of bidirectional converter directly affects the energy storage efficiency and system stability.Based on this,the closed-loop stability modeling of bidirectional converter in energy storage bidirectional response system is proposed.According to the working principle of bidirectional converter,the intelligent charging mode is designed,the system structure is determined,and the single-stage binary logic switching function is defined.According to the principle of equal-amplitude transformation,the three-phase stationary coordinates are converted into two-phase stationary coordinates,and the mathematical expression of the circuit is obtained.Based on a typical voltage outer-loop closed-loop control model,the original loop open-loop transfer function is calculated,and the original energy storage system transfer function is modified to make the system finally meet the stability requirements.The simulation results show that the method can output stable voltage waveform and ensure the stable and efficient operation of energy storage system.

关 键 词：储能系统 双向变流器 闭环控制 等幅变换 两相静止坐标 

分 类 号：TM464[电气工程—电器]