动态无功在电厂辅机启动过程中的补偿作用研究

Research on Compensation Effect of Dynamic Reactive Power During the Auxiliary Equipment Startup in Power Plant

电厂辅机启动过程中会产生较大的冲击电流,造成电网的电压降落,尤其对于小电网或孤立电网,压降更为严重。对动态无功在电厂辅机启动过程中的补偿作用进行研究,在电磁暂态仿真软件PSCAD环境中,建立了包含孤立电网、电厂辅机以及动态无功补偿装置的动态仿真模型。在不同工况下,对动态无功在电厂辅机启动过程中的补偿作用进行了研究和分析。结果表明,动态无功补偿装置可以有效地抑制电厂辅机在启动过程的电压降落。

During the auxiliary equipment startup in power plant,there will appear significant surge current that will cause considerable voltage dropping especially for the small grid or isolated power grid. In this paper,the compensation effect of dynamic reactive power during the startup of power plant auxiliary equipment is studied. By electromagnetic transient simulation software of PSCAD,a dynamic simulation model is established which contains isolated grids,pow-er plant auxiliary and dynamic reactive power compensation device. Under various operation conditions,the compensation effect of dynamic reactive power is studied and analyzed. The results showthat the dynamic reactive power compensation device can effectively suppress voltage drop during the startup.