CAJ | 학술논문

为了弥补单一储能技术的不足,由超级电容和储能电池组成的混合储能系统越来越多地应用于风电功率平抑。为保证混合储能系统整体充放能力,并充分利用超级电容反应快和储能电池容量大的特点,文中提出了一种基于电池荷电状态(SOC)分级优化的混合储能系统风电功率平抑方法。该方法采用了分层结构,包含优化控制层和协调控制层。优化控制层根据风电平抑性能要求以及混合储能系统当前整体SOC,计算动态调节储能系统的设定功率；协调控制层根据储能设备各自的SOC和充放电特性,按优化控制层计算出的设定功率进行功率分配,以实现对设定功率的快速跟踪。仿真实验证明,该方法在保持风电平抑效果不变的情况下,维持了混合储能系统整体较高的充放能力,同时优化了储能设备的SOC,避免了储能设备的过充过放。
위료미보단일저능기술적불족,유초급전용화저능전지조성적혼합저능계통월래월다지응용우풍전공솔평억。위보증혼합저능계통정체충방능력,병충분이용초급전용반응쾌화저능전지용량대적특점,문중제출료일충기우전지하전상태(SOC)분급우화적혼합저능계통풍전공솔평억방법。해방법채용료분층결구,포함우화공제층화협조공제층。우화공제층근거풍전평억성능요구이급혼합저능계통당전정체SOC,계산동태조절저능계통적설정공솔；협조공제층근거저능설비각자적SOC화충방전특성,안우화공제층계산출적설정공솔진행공솔분배,이실현대설정공솔적쾌속근종。방진실험증명,해방법재보지풍전평억효과불변적정황하,유지료혼합저능계통정체교고적충방능력,동시우화료저능설비적SOC,피면료저능설비적과충과방。
Hybrid energy storage,consisting of super capacitor and battery,has been widely applied to smooth wind power fluctuation because it can overcome the disadvantage of single energy storage technology.To ensure reliable charging and discharging performance of hybrid energy storage and fully take advantage of the characteristic of fast reaction of super capacitors and large capacity batteries,this paper proposes a wind power smoothing method using hybrid energy storage system based on hierarchical optimization of state of charge (SOC).This method adopts two-layer distributed control structure, including optimizing control layer and coordinated control layer.In the optimizing control layer,the target power of dynamic adjustment energy storage system is calculated according to the performance requirements of wind power smoothing and the current SOC of the system.In coordinated control layer,power distribution strategy is decided according to the SOC and charging and discharging characteristics of the energy storage devices and the target power calculated by the optimizing control layer,achieving fast tracking of reference power input.Simulation results indicate that the method can not only mitigate the wind power fluctuation,but also improve the charging and discharging performance of the hybrid energy system.The SOC of two energy storage devices is optimized and over charging and discharging of energy storage devices is avoided.