孤岛微电网多Agent分布式双层控制方法  

A Two-Layer Distributed Control Method for Islanded Microgrids by Using Multi-Agent Systems

作　　者：康文发 李强[1] 陈民铀[1] 彭琮波 陈飞雄 

机构地区：[1]输配电装备及系统安全与新技术国家重点实验室(重庆大学)

出　　处：《中国电机工程学报》2018年第3期770-781,共12页Proceedings of the CSEE

基　　金：国家自然科学基金项目(61105125,51177177);国家“111”计划(B08036)~~

摘　　要：针对微电网的能量管理和控制,提出一种双层结构的孤岛微电网分布式控制模型。底层为微电网,由分布式电源（distributed generator,DG）和负载组成,而上层为通信网络,由Agent组成。通信网络包含两个子网络,第一个子网络由全部Agent组成,第二个子网络只包含可控Agent。根据第一个子网络设计的控制律,用于维持微电网功率平衡,使得储能系统输出逐渐变为零。根据第二个子网络设计的控制律用于调节可控DG的输出,使得可控DG输出与其容量成正比。此外,系统地给出从任意通信网络为Agent导出分布式控制律的方法,并且,从理论上证明,只要Agent按照导出的控制律对DG实施控制,通过迭代就可实现可控DG按相同比例输出。最后,设计4组仿真算例验证控制方法的有效性。仿真结果表明,文中方法即使在环境和负载同时剧烈变化的情况下,仍然能够保证微电网稳定运行,并且保证系统功率按DG容量分配。In this paper, a two-layer, distributed control method for energy management and control of islanded microgrids（MGs） was proposed, where the top layer is a communication network composed of Agents, while the bottom layer is an MG composed of distributed generators（DGs） and loads. The communication network consists of two subgraphs, in which the first includes all Agents, while the second only includes controllable Agents. In terms of the first subgraph, a set of distributed control laws can be derived, which makes the outputs of a battery energy storage system return zero gradually, while the second set of control laws from the second subgraph is used to reassign the outputs of controllable DGs ensuring active and reactive power dispatched according to their capacities by iterations. Further, a systematic method was proposed to derive these two sets of control laws for Agents from any given communication network. Moreover, it was proved that proportional outputs of DGs are achieved iteratively, if Agents apply the derived control laws. Finally, four cases were designed to evaluate the performance of the proposed method. The simulation results show that active and reactive power can be dispatched proportionally even if load demand and environmental conditions fluctuate drastically.

关 键 词：分布式控制 多AGENT系统 网络控制系统 分层控制 微电网 

分 类 号：TM71[电气工程—电力系统及自动化]