考虑无功电流影响的储能系统直流母线稳压控制策略  

Dc Bus Voltage Regulation Control Strategy for Energy Storage System Considering the Influence of Reactive Current

作　　者：瓦明达 Wa Mingda(Guoneng(Guangdong)Energy Development Co.,Ltd,Guangzhou 510799,Guangdong,China)

机构地区：[1]国能(广东)能源发展有限公司,广东广州510799

出　　处：《云南电力技术》2024年第6期55-60,共6页Yunnan Electric Power

摘　　要：在储能系统三相功率变换器中,电压环作为有功电流环的外环,起到了维持储能系统直流母线稳压的作用。本文考虑了无功电流对电压回路动态性能的影响,分析了有功和无功电流导致的开关损耗对电压外环的影响,提出了储能系统直流母线的稳压控制策略,将功率损耗作为电压环的扰动项,分析了有功和无功电流对直流母线电压的影响,在此基础上设计了稳压回路,并对其原理进行了论证,分析了所提策略的动态性能。最后建立了30kW三相功率变换器的仿真模型和原理样机,仿真和实验证明,采用所提出的直流母线稳压策略,变换器能够实现良好的动稳态性能,证明了理论分析的正确性。In the three-phase power converter of the energy storage system,the voltage-loop is the outer loop of the active current-loop.It plays a role in maintaining the voltage regulation of the DC bus in the energy storage system.This paper the considers reactive current,which would affect the dynamic performance of voltage loop,analyzes the influence of switching loss caused by the active and reactive current on the outer voltage loop,and proposes a dc bus voltage stability control strategy of the energy storage system.The power loss is taken as the disturbance term of the voltage loop,and the influence of active and reactive currents on the voltage of the DC bus is analyzed.On this basis,a voltage stabilizing loop is designed,and its principle is demonstrated.The dynamic performance of the proposed strategy is analyzed.Finally,the simulation model and principle prototype of the 30kW three-phase power converter are established.The simulation and experimental results show that the converter can achieve good dynamic and steady performance with the proposed DC bus voltage regulation strategy,which proves the correctness of the theoretical analysis.

关 键 词：储能系统 三相功率变换器 直流母线稳压 功率损耗 电流内环 

分 类 号：TM74[电气工程—电力系统及自动化]