CAJ | 학술논문

储能系统作为微网的功率/能量缓冲环节，对微网的稳定控制、电能质量改善和不间断供电起着重要作用，是微网安全可靠运行的关键。首先分析了微网中储能系统常用的3种控制策略，讨论了其在微网不同运行控制模式中的应用；进而设计了一种针对电池储能系统(battery energy storage system，BESS)逆变器外环控制器的综合控制策略，能够兼具PQ控制、V/f控制和下垂控制功能，从而既可以用于主从控制的微网，也能用于对等控制的微网；同时还考虑了微网从孤岛转入并网和并网转入孤岛的双向切换过程，对设计的BESS综合控制策略进行了改进，实现了双向的平滑切换。算例结果验证了提出的综合控制策略的有效性。
저능계통작위미망적공솔/능량완충배절，대미망적은정공제、전능질량개선화불간단공전기착중요작용，시미망안전가고운행적관건。수선분석료미망중저능계통상용적3충공제책략，토론료기재미망불동운행공제모식중적응용；진이설계료일충침대전지저능계통(battery energy storage system，BESS)역변기외배공제기적종합공제책략，능구겸구PQ공제、V/f공제화하수공제공능，종이기가이용우주종공제적미망，야능용우대등공제적미망；동시환고필료미망종고도전입병망화병망전입고도적쌍향절환과정，대설계적BESS종합공제책략진행료개진，실현료쌍향적평활절환。산례결과험증료제출적종합공제책략적유효성。
As a buffer for microgrid, energy storage system plays a significant role in stability control, power quality improvement and uninterrupted power supply. Energy storage system is the key to safe and reliable operation of microgrid. Firstly, three kinds of energy storage system control strategies are introduced, and the application in different microgrid operation control modes is analyzed. Secondly, a comprehensive control strategy for the outer loop controller of battery energy storage system (BESS) is designed, to achieve PQ control, V/f control and droop control, which makes BESS can be applied in different microgrids using master-slave control or peer-to-peer control. In addition, the bi-directional switchover between grid-connected mode and islanded mode is considered, and an improved BESS comprehensive control strategy to realize smooth switchover is proposed. Finally, the validity of the strategy is verified through simulation.