自同步电压源逆变器并联系统控制策略研究

摘要

随着新能源发电和微网技术的不断发展,为满足微网系统的特殊需求,研究和讨论了自同步电压源逆变器并联运行控制策略.模拟同步发电机的转子运动方程、一次调频调压特性,给出自同步电压源逆变器的控制框图,分析其对并联系统稳定性及动态响应的影响,并研究了自同步电压源逆变器并联组网技术.仿真和实验表明,所提控制策略可实现自同步电压源逆变器并联系统的稳定运行和动、稳态功率均分,能很好地适应微网的运行要求.%With the continuous development of new energy generation and microgrid technology,to meet the specific needs of micro-grid system,the control strategy of self-synchronous voltage source inverter parallel system is studied and discussed.The control structure of self-synchronous voltage source inverter is constructed by imitating synchronous generator's rotor motion equation and primary frequency regulation feature and voltage regulation feature of synchronous machine.The effects of control strategy on the stability and dynamic response of the system are analyzed,and self-synchronizing voltage source inverter parallel networking technology is also studied.Simulation and experimental results demonstrate that the proposed control strategy can achieve the stable operation and dynamic-state as well as steady-state power sharing of self-synchronous voltage source inverter parallel system,can well adapt to the operation requirements of the microgrid.