微电网中分布式电源能量优化管理研究

Research on Energy Optimization Management of Distributed Power Supply in Microgrid

微电网作为分布式电源并网的新型技术不可避免地受到并网线路的电能损耗,该研究从微电网中的储能电源能量损耗最小为出发点,重点分析电源的电压损耗和功率损耗两个方面。通过光伏发电系统、风力发电系统、微型燃气轮机和储能蓄电池组搭建微电网结构,将不同发电系统并网线路分为是否带负载两种情况。利用传输电能线路的电压相位变化推导电压降低过程中的目标函数,并且结合负载有无功率损耗构造了能量优化约束条件。实验算例通过拉格朗日求解法结果表明,该研究提出的推导方式可以快速地计算出电源的电压和功率损耗最小值,且在函数驻点处给出了不同发电系统的各分支线路的复功率损耗。

The new technology of microgrid as grid-connected distributed power supply is inevitably affected by the energy loss of grid-connected lines. This paper starts from the point of minimizing the energy loss of energy storage in microgrid,focusing on the voltage loss and power loss of power supply. One aspect,the photovoltaic power generation system,the wind power generation system,the micro-gas turbine and the storage battery group are used to construct the micro-grid structure,and the grid-connected lines of different power generation systems are divided into two cases. The objective function in the process of voltage drop is deduced by the voltage phase change of the transmission power line,and the energy optimization constraint condition is constructed by combining the power loss of the load. The experimental results show that the proposed method can quickly calculate the minimum voltage and power loss of the power supply,and give the different branches of different power system at the function stagnation point and complex power loss.