陈金锋,贾科,宣振文,朱瑞
CHEN Jinfeng,JIA Ke,XUAN Zhenwen,ZHU Rui

• 1:新能源电力系统国家重点实验室(华北电力大学)

摘要(Abstract)：

直流微电网中由于虚拟电阻和线路阻抗分布不均,使得传统下垂控制无法满足直流电压稳定的要求。采用基于离散一致性算法的直流微电网电压控制策略,各发电单元采用相邻通信,根据系统电压迭代后的均值修正直流母线电压的参考值,从而补偿由下垂控制引起的电压降落。光伏电池采用最大功率跟踪控制,蓄电池采用带有电流阈值的恒压控制,在维持母线电压恒定的同时,防止端口电流过大缩短蓄电池的使用寿命,从而实现直流微电网的稳定运行。在MATLAB/Simulink中搭建了光-储直流微电网模型,当环境条件或负荷变化时,微电网能保证直流母线电压恒定以及有功功率平衡,验证了所提控制策略的有效性。
Due to the uneven distribution of virtual resistance and line impedance in DC micro-grid, the traditional droop control cannot meet the requirements of DC voltage stability. The voltage control strategy of DC microgrid voltage based on discrete consensus algorithm is adopted and adjacent communication is employed in generating units, and average value of system voltage iteration is used to correct the bus voltage reference value to compensate the voltage reduction caused by droop control. The photovoltaic cell is controlled by maximum power point tracking(MPPT) and the battery adopts the constant voltage control with current threshold. The outlet current is prevented from being too large to shorten the service life of the battery when the bus voltage is kept constant, and the stable operation of the DC microgrid is realized. Finally, the PV/storage DC micro-grid model is built in MATLAB/Simulink. When the environmental conditions and load change, the micro-grid can ensure the constant DC bus voltage and balanced active power, which verifies the effectiveness of the proposed control strategy.

关键词(KeyWords)： 直流微电网;离散一致性算法;电压控制;相邻通信
DC micro-grid;discrete consensus algorithm;voltage control;adjacent communication

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划基金资助项目(2018YFB0904100);; 国家自然科学基金项目(51725702,51777071)

作者(Author): 陈金锋,贾科,宣振文,朱瑞
CHEN Jinfeng,JIA Ke,XUAN Zhenwen,ZHU Rui

DOI: 10.19585/j.zjdl.201908011

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