风电接入对滇西北电网的暂态稳定影响研究

Research on the Transient Stability of the Northwest Yunnan Power Grid Connect to the Wind Farms

建立了含有风电场的电力系统大扰动稳定数学模型,通过微分方程和代数方程的迭代计算,完成大规模风电场接入后电力系统的大扰动稳定计算分析,并结合高渗透率风电的云南西北电网,结果表明:应限制滇西北电网的风电出力或者将水电机组停机来消纳风电,双馈风电场接入提高了系统的暂态稳定性,双馈机组在暂态过程中能提供无功支持,有利于电网的恢复,而异步风机在暂态过程中由于机端电压过低被切除,大扰动后的系统阻尼比符合南网的标准。

The mathematical model of large disturbance stability for power system containing wind farm is presented in this paper , through iterative calculation of differential equation and algebraic equation calculate and analysis large disturbance stability of the power system contained large scale wind farm, combined with the high permeability of northwest Yunnan wind power grid, the re- sults show that it should limit of northwest Yunnan power grid wind power or hydropower given wind power outage the doubly - fed wind power access to improve the transient stability of the system and doubly - fed generator can provide reactive power support in transient process, conducive to the recovery of power grid, and asynchronous fan in the transient process due to the low voltage of the machine is removed, After the big disturbance of the system damping ratio meets the requirements of the south network.