一种新型单相光伏发电系统并网技术的实现

A novel Single-phase Photovoltaic Grid-connected System and its Implementation

针对常规光伏并网发电系统的工作环境和特点,研究了经过DC/AC逆变后再通过AC/AC变换的并网控制技术。光伏并网发电系统在直接向用户供电的同时,把剩余的电能经过AC/AC变换输送到电网,通过调节其相位差和幅度向电网输入有功或无功功率。最后通过仿真和基于DSP的试验装置验证了该技术的有效性。

A photovoltaic （PV） grid-connected technique via single-phase AC-AC is proposed.By adjust the difference and amplitude between grid voltage and AC-AC output voltage,the active power and reactive power input to grid can be controlled.At the same time when providing power to user,the rest power from PV can be sent to grid.In this way,the efficiency of the photovoltaic generation is improved greatly.Simulative and experimental results verify the analysis results.