CAJ | 학술논문

　　光伏（PV）发电输出功率具有波动幅度大和随机性强的特点，大规模并网光伏电站需要电池储能系统（BESS）对输出功率波动进行平滑抑制，以降低对电网的冲击。提出了一种衡量不同BESS控制策略抑制PV功率波动能力的评价指标，针对现有基本功率平滑控制策略的不足，提出基于电池荷电状态(SOC)调整输出的储能功率控制策略。通过调节BESS输出功率，对PV输出功率中较高频段波动成分进行补偿，并且在储能电池荷电状态（SOC）偏高/低时对输出功率加以自适应调整，在不削弱补偿效果的前提下，将SOC维持在正常范围内。仿真结果表明所提方法在光伏输出波动剧烈时仍有较好的平滑效果，并且对电池容量的需求较小。
　　광복（PV）발전수출공솔구유파동폭도대화수궤성강적특점，대규모병망광복전참수요전지저능계통（BESS）대수출공솔파동진행평활억제，이강저대전망적충격。제출료일충형량불동BESS공제책략억제PV공솔파동능력적평개지표，침대현유기본공솔평활공제책략적불족，제출기우전지하전상태(SOC)조정수출적저능공솔공제책략。통과조절BESS수출공솔，대PV수출공솔중교고빈단파동성분진행보상，병차재저능전지하전상태（SOC）편고/저시대수출공솔가이자괄응조정，재불삭약보상효과적전제하，장SOC유지재정상범위내。방진결과표명소제방법재광복수출파동극렬시잉유교호적평활효과，병차대전지용량적수구교소。
Output of PV generation system features large fluctuation and strong stochastic effect. Battery energy storage system (BESS) is integrated with large-scale PV system to mitigate the power shock to the grid by smoothing out the output power fluctuation. This paper first presents a method to evaluate the capability of different energy storage control strategies to smooth out PV power fluctuations. Then an energy storage control strategy based on state of charge (SOC) adjustment is brought out. In this approach, fluctuation components of PV output power in relatively high frequency domain is compensated by tuning the BESS output power. When the SOC of battery is too high or too low, the BESS output power is adjusted. Thus, the SOC of battery stays in safe zone while the effect of compensation is not deteriorated. Simulation has proved that the method works well even when the volatility of PV output is rather strong, and it does not need a large battery capacity.