摘要
随着直流微电网容量的扩大,多电源之间的协调控制逐渐成为研究的热点。目前多源协调控制策略主要分为集中通信控制和自律分散控制。集中通信控制对中心控制单元有绝对依赖性,可靠性较低。该文基于虚拟电压和自律分散控制的思想,设计直流微电网分布式分层控制结构,并在每层设置相应的控制策略,实现多源协调控制。首先详细分析线路电阻对均流控制的影响,提出基于虚拟电压的均流控制策略,进而提出改进的动态一致性算法,以动态跟踪各换流器出口侧母线电压并快速收敛输出一致值,另外在已经收敛的情况下,通信拓扑的变化对当前收敛状态没有任何影响。仿真及实验对提出的动态一致性算法及协调控制进行验证。
With the expansion of DC micro-grid capacity, coordination control, including centralized communication control and autonomous distributed control is becoming the research hotspot. Being absolutely dependent on central control unit, centralized communication control has low reliability. Based on virtual voltage and autonomous decentralized control, a distributed hierarchical control structure for DC micro grid was designed in this paper, and corresponding control strategies were set up at each layer to realize multi-source coordinated control. The influence of line resistance on current sharing control was analyzed, and the current sharing control strategy based on virtual voltage was proposed. Furthermore, an improved dynamic consistency algorithm was proposed to dynamically track the bus voltage at the outlet side of each converter and rapidly get a consistent value. In the case of convergence, changing communication topology has no influence on the current convergence state. The dynamic consistency algorithm and the coordinated control strategy were verified by simulation and experiments.
作者
谢文强
韩民晓
王皓界
李蕊
吴鸣
XIE Wenqiang1, HAN Minxiao1, WANG Haojie2, LI Rui3, WU Ming3(1. State Key Laboratory of Alternate Electrical Power System with Renewable Energy Source （North China Electric Power University）, Changping District, Beijing 102206, China; 2. School of Electric and Electronic Engineering, North China Electric Power University, Changping District, Beijing 102206, China; 3. China Electric Power Research Institute, Haidian District, Beijing 100192, China)
出处
《中国电机工程学报》
EI
CSCD
北大核心
2018年第5期1408-1418,共11页
Proceedings of the CSEE
基金
国家电网公司科技项目(PDB 17201600116)~~
关键词
直流微电网
多源协调控制
虚拟电压
自律分散控制
动态一致性算法
分布式分层结构
DC micro-grid
multi-source coordinated control
virtual voltage
autonomous decentralized control
dynamic consistency algorithm
distributed hierarchicalstructure
