大规模风电等新能源的接入给电网带来了一系列问题，而储能技术是解决新能源并网的有效方法之一。本文首先介绍了对储能装置在接入CMC/ESS（Cascaded Multilevel Converter In Energy Storage System）直流侧的拓扑结构进行归纳总结，以及并对级联多电平型PCS的拓扑结构进行了总结分析；。然后对CMC/ESS在风电中的主要应用情况和控制策略的研究进展情况进行了归纳总结与分析。在此基础上，提出了应在针对CMC/ESS研究中将储能装置的选择、控制策略、级联多电平拓扑结构等问题作为下一步研究重点的提出了研究建议，可为更好地研究和利用级联多电平储能系统改善风电并网运行特性提供一定的借鉴。
英文摘要:
The grid has to face a series of problems of large-scale wind power and other new energy integrated to the power grid. Energy storage technology is one of the efficient methods to resolve the problem. At first, the topology of energy storage system access DC side of PCS (Power Conversion System)is summarized mainly. The topology of multilevel cascade-type power conversion system and the control strategy of CMC/ESS（Cascaded Multilevel Converter With Energy Storage System）are concluded and analyzed. According to the progress discussed above, the suggestions about the interesting research directions of the next research work, such as Energy storage device selection, the control strategy and the cascaded multilevel topology are presented. This paper will contribute to better research and application of CMC/ESS intended for improving the operation characteristics of wind power in the future