Atopology of interconnected hybrid generating system with PV and wind turbine to power grid

本研究针对光伏电池与风力涡轮机组成的并网混合发电系统的拓扑结构进行研究。我们首先讨论了互联风力发电系统。模拟风力涡轮机的直流电动机驱动永磁同步发电机。发电机产生的交流电经二极管整流器变换为直流电，再通过三相电流型逆变器与交流电网并网。只要适当调整逆变器的调制系数，就可以不受风力变动的影响，向电网输出各风速下的最大功率。下面，对太阳能发电系统进行说明，以使多个太阳能电池板在不同的太阳照射量下输出各自的最大功率。级联的升压斩波器连接到这样的两个PV板。最后，为了使光伏发电电压和风力发电电压能够合理地联合收割机组合，采用了串并联斩波的DC-DC变换器。即使太阳辐照度和风速剧烈波动，逆变器电路也可以稳定地操作，并且通过控制转换器中的占空因数和逆变器中的调制因数，可以将相应的最大输出功率提供给电网。

A topology of the interconnected hybrid generating system with photovoltaic cells and a wind turbine to the AC power grid has been investigated in this research. We have first discussed the interconnected wind generating system. DC Motor simulating the wind turbine drives the Permanent Magnet Synchronous Generator. The generating AC power should be converted to the DC by diode rectifier, and then be interconnected to the AC power grid through the three-phase current source inverter. By adjusting only the modulation factor in the inverter appropriately, the maximum power in each wind velocity can output to the grid regardless of the wind fluctuation.Next, the solar generating system has been discussed so that plural PV panels under the different solar irradiances can output the respective maximum powers. The cascaded boost choppers are connected to such two PV panels. It has been made clear by several experiments that the proposed system can carry out the above purpose.Finally, in order to combine properly the both PV and wind generating voltages, the DC-DC converter applied with the series-parallel chopper is employed. Even if the solar irradiance and the wind velocity are fluctuated violently, the inverter circuit can be operated stably, and the respective maximum output powers can be supplied to the grid by controlling the duty factor in the converter and the modulation factor in the inverter.