分布式无功补偿系统在光伏电站中的应用

Application of Distributed Reactive Power Compensation System in Photovoltaic Power Station

荒山光伏电站具有占地广、发电设备数量多、场内集电线路长等特点,光伏场区内相应的无功功率较大,需配置一定容量的无功补偿设备。采用分布式无功补偿系统,利用光伏场区发电单元与升压站内集中性无功补偿设备,可有效降低无功功率补偿的集中性,降低工程成本,增加系统可靠性。针对某地区30 MWp地面光伏电站工程在建设中采取分布式无功补偿系统技术方案,通过该技术可以充分结合光伏电站中的电力电子元件,满足电站运行及电站并网调度所要求的无功补偿容量。此外,通过采用该技术,在大型荒山光伏电站中对无功电力电子元件进行整合,对电站内汇集线路的两段及沿线进行无功补偿,既平衡了整个电站的无功出力,又节省了电站的整体投资。

Deserted mountain photovoltaic power stations has the characteristics of a wide area,a large number of power generation devices,and a long power collection line in the field.The corresponding reactive power in the photovoltaic field area is large,and a certain capacity of reactive compensation equipment needs to be configured.The distributed reactive power compensation system is adopted,and the centralized reactive power compensation equipment in the photovoltaic field power generation unit and the booster station can effectively reduce the concentration of reactive power compensation,reduce engineering costs and increase system reliability.For the 30 MWp ground photovoltaic power station project in a certain area,the distributed reactive power compensation system technical scheme was adopted in the construction.Through this technology,the power electronic components in the photovoltaic power station can be fully combined to meet the reactive power compensation capacity required by the operation of the power station and the grid-connected dispatch of the power station.In addition,by adopting this technology,the reactive power electronic components were integrated in the large-scale barren mountain photovoltaic power station,and the reactive power compensation was carried out with the two sections of the collection line in the power station and along the line,which not only balanced the reactive power output of the entire power station,but also saved the overall investment of the power station.