CAJ | 학술논문

针对光伏等可再生能源发电的间歇性和功率波动问题，提出一种新型的用于混合储能的组合级联式隔离型多端口变流器拓扑结构及其控制策略。该装置由蓄电池组、超级电容器组、多端口隔离半桥DC/DC变换器和级联式H桥DC/AC变换器组合而成。首先对该拓扑的工作原理进行了分析；然后结合相应的控制策略，通过滑动平均滤波算法将外界给定目标功率指令在各储能单元之间进行合理分配，并在PLECS上搭建了基于该装置的光伏电站并网模型进行仿真；最后，结合仿真结果和实际工程案例对该装置可带来的经济效益进行了定量分析。结果表明，所提出的混合储能拓扑结构可有效结合超级电容器功率密度高、响应速度快，和蓄电池能量密度高、适用于平抑长周期缓慢功率波动的特点，提高了间歇式电源并网运行的电能质量和可调度性，同时避免了蓄电池频繁充放电，显著延长了电池使用寿命。该装置可用于基于蓄电池-超级电容器混合储能（BSHES）的大功率储能电站，实现平滑可再生能源发电输出功率波动和微电网中的调频调压功能，模块集成度高，可实现模块化生产，具有广阔的应用前景。
침대광복등가재생능원발전적간헐성화공솔파동문제，제출일충신형적용우혼합저능적조합급련식격리형다단구변류기탁복결구급기공제책략。해장치유축전지조、초급전용기조、다단구격리반교DC/DC변환기화급련식H교DC/AC변환기조합이성。수선대해탁복적공작원리진행료분석；연후결합상응적공제책략，통과활동평균려파산법장외계급정목표공솔지령재각저능단원지간진행합리분배，병재PLECS상탑건료기우해장치적광복전참병망모형진행방진；최후，결합방진결과화실제공정안례대해장치가대래적경제효익진행료정량분석。결과표명，소제출적혼합저능탁복결구가유효결합초급전용기공솔밀도고、향응속도쾌，화축전지능량밀도고、괄용우평억장주기완만공솔파동적특점，제고료간헐식전원병망운행적전능질량화가조도성，동시피면료축전지빈번충방전，현저연장료전지사용수명。해장치가용우기우축전지-초급전용기혼합저능（BSHES）적대공솔저능전참，실현평활가재생능원발전수출공솔파동화미전망중적조빈조압공능，모괴집성도고，가실현모괴화생산，구유엄활적응용전경。
For the photovoltaic and intermittent energy power generation power fluctuation, this paper presents a novel multiport isolated converter topology and its control strategy of combination cascade type for hybrid energy storage. The device consists of battery packs, super capacitor packs, multiport isolated half-bridge DC/DC converter and cascaded H-bridge DC/AC converter. The working principle of this topology is analyzed, and then combined the corresponding control strategy, through the sliding average filter algorithm, the outside given power instructions will be in all storage allocation units;and finally, this paper makes a quantitative analysis on economic benefits of the device based on the simulation results and the actual project data. The results of simulation show that the proposed topology can be effectively combined with the characteristics of super capacitor of high power density, fast response speed and battery applied to stabilize the long periodic slow power fluctuation, improving the operation of intermittent power grid power quality and dispatchableability, while avoiding the battery charge and discharge frequently. The device can be used for high power energy storage power station based on battery and super-capacitor hybrid energy storage (BSHES), to realize the function of smoothing renewable energy power generation output power and frequency or voltage modulation in the micro grid;each module can realize high integration degree and modular production, so it has a broad application prospect.