基于多维度指标的直流外送系统故障集递进高频切机优化方法OA

To address the problems of large-scale power flow transfer and sharp frequency rise caused by DC line block-ing faults in DC sending systems with a high proportion of new energy,a high-frequency generator tripping configura-tion scheme suitable for DC sending systems is proposed by considering indexes such as power flow distribution.First,a multi-dimensional index for evaluating the rationality of high-frequency generator tripping is constructed by integrat-ing frequency and power flow distribution.On this basis,a method for selecting the type and location of high-frequency generator tripping based on the node contribution factor is put forward.Second,to optimize the tripping capacity and tripping rounds,a method of setting the maximum and minimum faults in the same fault set separately is adopted,and a fault set progressive high-frequency generator tripping optimization method based on the multi-dimensional index is for-mulated.Finally,the correctness and effectiveness of the proposed scheme are verified on a CSEE standard example.Results show that the proposed generator tripping scheme can effectively curb the rapid rise of frequency,improve the system power flow distribution after tripping,reduce the number of tripping rounds,and decrease the tripping capacity by more than 10%.