孤岛智能配电网下的快速自动发电控制机组一致性协同控制算法

Collaborative consensus algorithm for automatic generation control in an islanded smart distribution grid

中文关键词  智能配电网  一致性协同  分布自治  集中协调  AGC功率分配

英文关键词  smart distribution grid  collaborative consensus  decentralized autonomy  centralized coordinate  generation command dispatch.

中文摘要

      由于可再生能源随机性、间歇性的特征和智能电网“即插即用”的要求, 传统的集中式AGC控制方法面临诸多 挑战, 分布自治与集中协调已成为智能配电网的未来发展方向. 为此, 本文提出了一种基于等微增率的AGC机组一致性 协同控制算法, 解决了孤岛智能配电网的频率自治与协同控制问题; 并提出了一种“虚拟一致性变量”的概念, 用于解 决AGC机组功率越限导致的拓扑变化问题和实现AGC机组的“即插即用”; 同时, 在智能配电网发生负荷扰动的情况 下, 为保证所有机组在新的工况下仍能达到最优经济运行, 建立了AGC功率分配与短期经济调度的协同目标. 最后搭建 了包含多种分布式电源及多个微网的智能配电网模型, 仿真表明: 与传统集中控制方法相比, 一致性协同算法动态优化 速度快, 收敛鲁棒性强, 能有效解决孤岛智能配电网的频率自治与协同控制问题.

英文摘要

      Due to the feature of the randomness and intermittency of renewable energy and the requirement of ‘plug and play’ of smart grid, the traditional centralized AGC control methods face many challenges, decentralized autonomy and centralized coordinate have become the development direction of the smart distribution grid. Therefore, a collaborative consensus algorithm based on equal incremental principle for AGC is proposed to solve the problem of frequency autonomy and cooperative control of islanded smart distribution grid. A ‘virtual consensus variables’ is introduced to manage about topological change caused by power exceeding of AGC generation units and implement ‘plug and play’. Meanwhile, to ensure that all units can achieve optimal economic operation when load disturbance occurs, a cooperative objective of AGC power distribution and short term economic dispatch is established. Finally, a smart distribution grid model including different types of micro sources and micro grids is constructed. In contrast with the traditional centralized control methods, collaborative consensus algorithm shows its advantages on computing speed and convergence robustness, and it provides a new way to solve frequency autonomy and cooperative control problem of islanded smart distribution grid effectively.