Security analysis-linear sensitivity analysis method Linear Sensitivity factor Approximate analysis of the effect of different outages Based on (limited to)DC power flow Only compute the active power flow,around 5%accuracy Approximately compute the power flow change when generation or network changes Two types of sensitivity factors: Generation shift factor:=Ap Change of line with respect to generator i Line Outage Distribution Factors:LODF: f我 Change of line with respect to line k 电力镜广城测量与控制四川省重点实验蜜 家电网电力系统广域测量与控制四川省重点实验室  Linear Sensitivity factor  Approximate analysis of the effect of different outages  Based on (limited to) DC power flow  Only compute the active power flow, around 5% accuracy  Approximately compute the power flow change when generation or network changes  Two types of sensitivity factors:  Generation shift factor:  Change of line l with respect to generator i  Line Outage Distribution Factors: LODF:  Change of line l with respect to line k , l l i i f P     , 0 l l k k f d f   Security analysis-linear sensitivity analysis method