考虑负荷暂态特征的储能系统控制策略研究
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摘要
由于负荷状态暂态行为会影响分布式发电系统与配电网所构成大电网的暂态稳定性,因此通过与数据库中负荷特征进行匹配实现对负荷状态暂态行为作出分析描述,在分析负荷暂态特性的基础上进行储能系统控制。在对分布式发电储能系统的控制策略研究中,采用Buck/Boost双向变换器为拓扑结构为模型,并在考虑电网用户负荷的瞬态特性以及保证电网与分布式电源接口的直流母线电压稳定特性下,对储能系统进行单独的控制设计。仿真结果表明所设计的储能系统控制策略在分布式发电功率变化下,接口输出电压都能满足不同用户负荷的需求。
Because the transient behavior of load state will affect the transient stability of the whole power grid composed of distributed generation system and distribution network, this paper describes the transient behavior of load state by matching the load characteristics in the database,and the control of energy storage system is carried out based on the analysis of load transient characteristics. In the research of control strategy of distributed generation energy storage system, the Buck/Boost bi-directional converter is used as the model, and the energy storage system is designed separately considering the transient characteristics of user load and the voltage stability characteristics of DC bus which guarantees the interface between grid and distributed generation. The simulation results show that the output voltage of the interface can meet the demand of different user loads under the change of distributed generation power.
Because the transient behavior of load state will affect the transient stability of the whole power grid composed of distributed generation system and distribution network, this paper describes the transient behavior of load state by matching the load characteristics in the database,and the control of energy storage system is carried out based on the analysis of load transient characteristics. In the research of control strategy of distributed generation energy storage system, the Buck/Boost bi-directional converter is used as the model, and the energy storage system is designed separately considering the transient characteristics of user load and the voltage stability characteristics of DC bus which guarantees the interface between grid and distributed generation. The simulation results show that the output voltage of the interface can meet the demand of different user loads under the change of distributed generation power.
引文
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[2]尹阜丰.分布式发电及其对电力系统的影响[J].科技创新与应用,2016,36:252-252.
[3]范士雄,蒲天骄,刘广一,等.主动配电网中分布式发电系统接入技术及其进展[J].电工技术学报,2016,31(A02):92-101.
[4]W.L,X.Ruan,D.Pan,X.Wang.Full-feed forward schemes of grid voltages for a three phase LCL type grid connected inverter[J].IEEE Transactions on Industrial Electronics,2013,60(6):2237-2250.
[5]Hamefors,A.G.Yepes,A.Vidal,etc.Passivity based controller design of grid connected VSCs for prevention of electrical resonance instability[J].IEEE Transactions on Industrial Electronics,2015,62(2):702-710.
[6]Harnefors,A.G.Yepes,A.Vidal,etc..Passivity based stabilization of resonant current controllers with consideration of time delay[J].IEEE Transactions on Power Electronics,2014,29(12):6260-6263.
[7]潘嘉进,刘彦呈,张勤进,等.基于电网电压全前馈的七电平光伏并网系统[J].电力系统及其自动化学报,2017,29(6):53-58.
[8]李晓,薛禾雨,朱龙.不平衡电网电压下双馈风力发电系统功率谐振补偿控制[J].电工技术,2017,7:143-145.
[9]梁世林,马立修,赵永,等.基于负载电流前馈补偿的网侧变流器控制[J].山东理工大学学报:自然科学版,2017,31(3):15-19.
[10]白迪,曹华锋,申爱兵.基于混合储能系统DC-DC变换器控制策略的研究[J].蓄电池,2016,53(2):64-68.
[11]樊一江,尚飞艳,张龙,等.基于功率平衡的微电网稳定性控制策略[J].工业仪表与自动化装置,2017,2:63-66.
[12]董朝阳,赵俊华,文福拴,等.从智能电网到能源互联网:基本概念与研究框架[J].电力系统自动化,2014,38(15):1-11.