When a new user accesses the CDMA system, the load will change drastically, and therefore, the advanced outer loop power control （OLPC） technology has to be adopted to enrich the target signal interference ratio （S...When a new user accesses the CDMA system, the load will change drastically, and therefore, the advanced outer loop power control （OLPC） technology has to be adopted to enrich the target signal interference ratio （Silt） and improve the system performance. The existing problems about DS-CDMA outer loop power control for multi-service are introduced and the power control theoretical model is analyzed. System simulation is adopted on how to obtain the theoretical performance and parameter optimization of the power control algorithm. The OLPC algorithm is improved and the performance comparisons between the old algorithm and the improved algorithm are given. The results show good performance of the improved OLPC algorithm and prove the validity of the improved method for multi-service.展开更多
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...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。展开更多
基金the National Natural Science Foundation of China (60532030).
文摘When a new user accesses the CDMA system, the load will change drastically, and therefore, the advanced outer loop power control （OLPC） technology has to be adopted to enrich the target signal interference ratio （Silt） and improve the system performance. The existing problems about DS-CDMA outer loop power control for multi-service are introduced and the power control theoretical model is analyzed. System simulation is adopted on how to obtain the theoretical performance and parameter optimization of the power control algorithm. The OLPC algorithm is improved and the performance comparisons between the old algorithm and the improved algorithm are given. The results show good performance of the improved OLPC algorithm and prove the validity of the improved method for multi-service.
文摘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。
