一种可再生能源接入的多端口 变换器及其能量协同管理

针对水力发电和光伏发电存在功率波动大、稳定性差等问题,提出了一种适应新能源接入的多端口变换器及能量协同控制方案.首先,针对多端口变换器常见的拓扑结构进行了对比分析,选定了多端口变换器的拓扑结构;其次,针对多种新能源(如光、水、风力等)能量互补的一般性问题,提出了一种基于多端口变换器的多模态能量协同控制方案.最后,仿真模拟了多工况下的运行状态,仿真结果表明,双层控制策略能有效地实现能量协调调度,能解决某局部区域内的负荷季节性过载问题.该多端口变换器能实现对直流母线电压、输出功率等关键参数的控制,具有较强的适应能力.

A Multi-port Converter for Renewable Energy Access and Its Energy Cooperative Control

As the power of hydroelectric power generation and photovoltaic power generation systems are frequently fluctuated and have poor stability, a multi-port converter and its energy cooperative control scheme are proposed for new energy access. Firstly, the common topologies of multi-port converters are compared and analyzed, and one of the multi-port converters is selected. Secondly, for the general problem of energy complementation of a variety of renewable energy (such as light, water and wind etc.), a multi-mode energy control cooperative strategy is proposed based on multi-port converters. Finally, the running status under multiple working conditions is simulated, and the simulation results show that the two-layer control strategy can effectively execute the energy coordination and scheduling, which can alleviate the seasonal overload problem in the region vividly. Therefore, the multi-port converters show strong adaptability for the control of the DC bus voltage and output power.