The reliability of power system which only consists of traditional generators is easy to be assessed using Monte Carlo simulation because the generators can be simplified to a two -state model.But the wind turbine generator system cannot be treated as a two-state model in power system considering large -scale wind power integration due to the randomness and in-termittent of wind.Hence, generalized equivalent approach is put forward .In this method, wind turbine generator system can be equivalent to a traditional generator step by step and a coefficient named zzc is introduced to define the equivalent genera-tors′average time of steady operation———MTTS.The RTS79 system is chosen as an example .Considering the large -scale wind power integration , the reliability index like EENS and LOLE are calculated using generalized equivalent approach and its outcomes are compared to those using traditional Monte Carlo simulation .It provides an idea to simplify the model of wind tur-bine generator system , which has guiding meaning to the reliability assessment of power system considering large -scale wind power integration .%只含有传统机组的发电系统，由于可将机组简化为两种状态模型，采用蒙特卡洛模拟法模拟机组状态，其可靠性评估较易实现。由于风的随机性和间歇性，在含有大规模风电接入的发电系统中，不能简单将风电机组看成两种状态模型。因此，提出广义等效法，将风电机组群一步步等效成1个传统机组，并引入zzc系数定义了该等效机组的平均稳定工作时间MTTS。选取RTS79系统作为算例，考虑大规模风电的接入，使用广义等效法计算可靠性指标EENS和LOLE，并与传统蒙特卡洛模拟法的结果进行比较。所提方法为简化风电机组群模型提供了思路，对含大规模风电接入的发电系统可靠性评估有一定指导作用。
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