摘要
针对非同等功率等级的逆变器无线并联,考虑到系统功率限制,必须让负荷按照正比于功率的方式实现分配的问题,围绕下垂控制原理,通过对输出电压幅值和频率进行收敛性分析,推导出逆变负荷按容分配的充分条件。此外,引入虚拟阻抗法和双环调节器,搭建由两台不同容量的逆变器组成的微电网系统,通过仿真和试验验证了上述理论分析的有效性。
Considering the power limitation of the wireless paralleled inverters with different power level, the load distribution must be proportional to the capacity, which is a difficulty of micro-grid research over the past two years. Around the droop control principle, this article deduced the sufficient conditions of proportionally distributing the load through the convergence analysis of the amplitude and frequency of the output voltage. The sufficient conditions serve a very good guidance function on the determination of the droop control coefficient. In addition, the article introduced the virtual impedance method and double loop controller and set up a parallel system composed of two inverters with different capacity. The simulation and experiment results verify the correctness and effectiveness of the above theoretical analysis.
出处
《电器与能效管理技术》
2015年第11期37-43,共7页
Electrical & Energy Management Technology
基金
国家自然科学基金(61463037)
江西省教育厅科技项目(GJJ14531)
关键词
逆变器
无线并联
下垂控制
收敛性分析
按容分配
inverters
wireless parallel
droop control
convergence analysis
distribution by capacity
