Analysis of fast transients imposed on wind farm transformer by vacuum circuit breakers

风能预计将对发电产生重大影响。由于连接量大，从电力系统暂态的角度来看，将风能纳入配电网存在挑战。高频快速瞬变问题被认为是风电场连接部件严重应力的主要来源，已被大力研究。在过去，由于雷电引起的暂态和负载变化或故障发生的开关操作是过电压的主要原因。然而，随着可再生能源向电网渗透的增加，现在大多数瞬变似乎是由于主要能源的性质。此外，由于风速的变化，真空断路器（vcb）的频繁运行在与风电场相连的电网中很常见。

Wind energy is foreseen to have significant impact on power generation. Due to a large number of interconnections, there are challenges for integrating wind energy into the distribution network from power system transient perspective. Problems with high frequency fast transients that are considered as major sources of severe stresses on wind farm connected components have been vigorously investigated. In the past transients due to lightning and switching operations with load changes or fault occurrences were the main causes of overvoltages. However, with increased penetration of renewable energy sources to the grid, now the majority of transients seem to be due to the nature of the primary source of energy. In addition, the frequent operation of vacuum circuit breakers (VCBs) is common in grids connected to wind farms due to variation in wind speed,