CAJ | 학술논문

独立光伏系统受温度、光照强度等影响，其输出功率具有间歇性、分时性的缺点，然而储能系统“削峰填谷”的功能可以弥补光伏系统的缺点。文章通过双向Buck／Boost电路实现能量的双向流动，采用互补的PWM控制方式实现蓄电池充放电的平滑切换，应用电压电流双闭环控制的方法来抑制直流母线电压的波动。采用双重变换器不仅能够减小电感的大小和设备的重量，而且能够减小电压纹波的大小，同时增加了设备的容量。最后在实验室现有设备的基础上搭建相关实验平台，验证了基于双重双向DC／DC变换器的光储系统及相关控制策略的有效性与优越性。
독립광복계통수온도、광조강도등영향，기수출공솔구유간헐성、분시성적결점，연이저능계통“삭봉전곡”적공능가이미보광복계통적결점。문장통과쌍향Buck／Boost전로실현능량적쌍향류동，채용호보적PWM공제방식실현축전지충방전적평활절환，응용전압전류쌍폐배공제적방법래억제직류모선전압적파동。채용쌍중변환기불부능구감소전감적대소화설비적중량，이차능구감소전압문파적대소，동시증가료설비적용량。최후재실험실현유설비적기출상탑건상관실험평태，험증료기우쌍중쌍향DC／DC변환기적광저계통급상관공제책략적유효성여우월성。
Affected by temperature,light intensity and other factors,the stand-alone photovoltaic system has disad-vantages of intermittence and time-sharing. However,the‘peak’feature of energy storage system can make up the shortcomings of the photovoltaic system. The bi-directional energy flow is realized by bi-direction Buck/Boost cir-cuit. Complementary PWM control method is adopted to realize the smooth handoff for storage battery charging and discharging. Voltage and current double closed-loop control method is applied to suppress the DC bus voltage fluctu-ations. Dual bi-directional Buck/Boost converter can not only reduce the weight of the inductor and the size of the e-quipment,but also reduce the size of the ripple voltage and increase the capacity of the equipment at the same time. Finally the experiment platform is set up on the basis of laboratory equipment,and verifies the correctness of the con-trol strategy.