多能激励直流微网群落能量交互机理与协同自律控制研究

For the third-generation power grid that uses large-scale renewable energy and operates intelligently and energy interconnection, the concept of Multi-micro-grids (MMG) is proposed which is an organic combination of several micro-grids of the same geographic attribution, large-capacity distributed generation and centralized /distributed energy storage.The structure and voltage levels of MMG and local power congestion and power deficiencies during energy dispatching are studied. Internal mechanisms of energy dispatching and coordinated control of MMG and the interaction mechanism between MMG and grid are explored.Interfacing control and power scheduling strategy of DC microgrid in MMG are studied, and the control mechanism of virtual DC machine (VDCM) and influence mechanism between DC microgrid and clusters bus are explored.The coordinated control and energy dispatching strategy of energy storage in MMG are studied , and the mechanisms of power distribution of centralized HES and intelligent access of decentralized EV is explored.The response of multiple Virtual Synchronous Generator (VSG) with common DC bus is studied , the mechanisms of parallel VSG interface and power control are discussed. The harmonic interaction mechanism & coordinated synergistic rules among micro-grids, distributed generation and hybrid energy storage are revealed. So the whole MMG acts as a scheduling power macroscopically, and friendly connects to smart distribution network. The project provides new ideas to improve power quality & stability of the third-generation power grid and expand the application range of renewable energy, which has enormous significance to the large-scale use of renewable energy.

针对再生能源大规模利用与智能化运行的第三代电网与能源互联，提出把大量地理位置归属一致的若干微型电网、分布式发电场与集中及分散储能有机组合成微网群落。研究微网群落架构与电压等级及能量调度中出现的局部功率拥堵和功率欠缺，探寻微网群落能量调度与协调控制内在机理及群落与电网交互机理；研究微网群落中直流微网接口控制及功率调度策略，探究VDCM控制机理及直流微网与群落母线内在影响机理；研究微网群落储能协调控制与能量调度，探索集中式HES功率分配及分散式EV智能接入机理；研究虚拟同步电机VSG共直流母线多机响应控制，探讨VSG模块并联接口及功率控制机理。揭示微网群落内微型电网、分布式发电场与HES之间谐波交互机理和协调协同的内在规律，使微网群落宏观上具有可调度性，并友好接入智能配电网。项目为改善第三代电网稳定性和电能质量、扩大再生能源匹配范围提供了新思路，对规模化利用再生能源具有重要意义。

将散落在相邻地域的分布式发电及微网、集中和分散储能及负荷统一在微网群落核心数据管理层，根据配电网调度指令协调分散式EV和集中式HES；构建了用于虚拟直流电机VDCM与虚拟同步电机VSG接口的电力电子变换模型，形成高度自治、友好的发配储用微网群落，完成对常规电力系统零扰动和有效补充部分，实现了直流微网群落内分布式发电等元素协同、自律、稳定及能量调度与协调控制。