自同步电压源逆变器并联系统控制策略研究

Research on the Control Strategies of Self-synchronous Voltage Source Inverter Parallel System

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 sync- hronous 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.