锁相环原理下孤岛混合微电网群功率协调控制  

Power coordination control of island hybrid microelectric networks under the principle of phase locked loop

作　　者：芦鹏 LU Peng(State Grid Yinchuan Power Supply Company,Yinchuan 750001,China)

机构地区：[1]国网银川供电公司,宁夏银川750001

出　　处：《电子设计工程》2024年第24期157-161,共5页Electronic Design Engineering

基　　金：国网宁夏电力有限公司科技项目(5229JY230003)。

摘　　要：为实现合理的功率分配和调度,基于锁相环原理,针对孤岛混合微电网群功率协调控制方法展开研究。在分析锁相环结构与原理后,利用数字锁相技术对孤岛混合微电网群的母线三相电压进行锁相和跟踪,计算功率因数角和并网电流相角,以其为基础计算闭环参考电流。将闭环参考电流输入到逆变器内,生成脉宽调制驱动信号,通过驱动逆变器开关,使并网电流主动跟随闭环参考电流,从而实现功率协调控制。实验表明,该方法可有效跟踪母线a相电压相位,在存在6次谐波干扰的情况下,该方法运用锁相环技术依然可以有效跟踪母线电压相位,频率控制字波动范围较小,应用性较好。To achieve reasonable power allocation and scheduling,based on the principle of phase locked loop,research is conducted on the power coordination control method for islanded hybrid microgrids.After analyzing the structure and principle of phase locked loop,digital phase locked technology is used to lock and track the three-phase voltage of the busbar in the islanded hybrid microgrid group.The power factor angle and grid connected current phase angle are calculated,and the closed-loop reference current is calculated based on them.Input the closed-loop reference current into the inverter to generate a pulse width modulation drive signal.By driving the inverter switch,the grid connected current actively follows the closed-loop reference current,thereby achieving power coordination control.The experiment shows that this method can effectively track the phase of phase a voltage on the bus.Even in the presence of 6th harmonic interference,this method can still effectively track the phase of bus voltage using phase locked loop technology.The frequency control word fluctuation range is small,and the applicability is good.

关 键 词：锁相环原理 孤岛混合 功率协调控制 逆变器 

分 类 号：TM926[电气工程—电力电子与电力传动] TN-9[电子电信]