孤立交直流混合微电网控制策略研究  

Research on Regulation Scheme of Islanded Hybrid AC-DC Micro-Grid

作　　者：赵玉林[1] 惠明通 

机构地区：[1]哈尔滨工业大学电气工程及自动化学院,黑龙江哈尔滨150001

出　　处：《电器与能效管理技术》2016年第4期44-50,57,共8页Electrical & Energy Management Technology

基　　金：国家自然基金项目(51361130153)

摘　　要：与传统直流或交流微电网相比,交直流混合微电网结构灵活、能量利用率高,但控制复杂。为了保证独立运行状态下交直流混合微电网在小扰动下能够稳定运行,提出了一种改进的混合微电网协同控制策略。控制策略可以有效地减小独立运行状态投切负荷对系统频率的影响,并保证蓄电池最大备用,减小蓄电池装机容量。建立了交直流混合微电网的仿真模型,重点分析了风力发电机、双向AC/DC变流器和双向DC/DC变流器的结构以及控制方式。利用所建模型对所提控制策略进行仿真验证,证明了所提控制策略的有效性。A hybrid AC-DC micro-grid has flexible structure and high energy efficiency but complex control compared with conventional AC or DC micro-grid. To ensure the stable operation of the islanded hybrid AC-DC micro-grid in small perturbations,this paper proposed an improved coordinated control strategy of hybrid micro-grid.In islanded status this strategy could effectively reduce the frequency change when load changes and ensures the maximum battery backup to reduce the battery capacity. The paper also established the simulation model of hybrid AC-DC micro-grid and analyzed the structure and control of wind turbines,bidirectional AC-DC converter and bidirectional DC-DC converter. The simulations prove that the proposed control strategy is effective.

关 键 词：交直流混合微电网 协同控制 双向AC/DC变流器 双向DC/DC变流器 

分 类 号：TM711.2[电气工程—电力系统及自动化]