面向中压主动配电网的储能设备多为独立的蓄电池或超级电容，存在储能容量小、协调控制困难、无法兼具高能量密度与高功率密度、需配置变压器等问题。为此，本项目提出以模块化多电平换流器（MMC）为功率变换系统的集成蓄电池与超级电容的新型混合储能系统，旨在探讨拓扑结构与控制方法对混合储能系统中储能元件能量转换特性的影响机理，阐明不确定性扰动对混合储能系统运行稳定性的作用机制，攻克新型混合储能系统复杂能量调控关键问题，并初步构建一套新型混合储能系统模型预测控制（MPC）方法。主要研究内容为：新型混合储能系统拓扑结构演化规律、评价机制与数学模型研究；新型混合储能系统的先进模型预测控制研究；基于MPC的混合储能系统参数鲁棒性与稳定性分析。本项目的研究成果为应用于中压主动配电网的储能装备提供了一种新的选择，并为新型混合储能系统的工程化应用提供理论支撑。

Most energy storage devices applying to medium-voltage active distribution network are isolated battery or super-capacitor, which have the following disadvantages such as small energy storage capacity, hard to cooperate control, cannot combining high energy density and high power density, step-up transformer required. To address this issue, this project proposes a new modular multilevel converter (MMC) based hybrid energy storage system (HESS), combining battery and super-capacitor, aiming to investigate the impact mechanism of circuit topology and control method on the energy conversion characteristics of energy storage elements and reveal the functionary mechanism of uncertain disturbance on the operation stability of the HESS. Furthermore, this project would address the key issue of complex energy regulation of the novel HESS, and would set up a model predictive control (MPC) method for the new HESS. The main research includes: topology evolution, assessment method and mathematical model of the new HESS; advanced model predictive control of the novel HESS; analysis of parameter robustness and stability of the MPC based HESS. The research results of the project will provide a new alternative of the medium-voltage active distribution network oriented energy storage device, and provide a theoretical reference for the application of the HESS in practical projects.