The invention discloses a method for evaluating the power
system static risk based on
hybrid power flow. The method comprises the steps that (1) according to the current structure of a power
system and a planning scheme, a corresponding planning scheme model is established; (2) according to equipment data and the structure of a
power grid, predicated faults of the
power grid and the possibility of the predicated faults are analyzed, and then a predicated fault set is established; (3) the
power flow corresponding to all the faults in the predicated fault set is worked out through the risk state based on the
hybrid power flow, and for the fault with power flow out of range,
load loss is used as a fault consequence; (4) according to the
load loss of the fault states and the possibility of the fault, the
system risk indicator is worked out; (5) according to the
system risk indicator, the weak link of the system is found. According to the method for evaluating the power system static risk based on the
hybrid power flow, the problem that when high-order fault occurs in a large complicated
power grid, misconvergence of power flow is caused due to the fact that only alternating-current power flow is applied during
risk evaluation is solved through the
hybrid power flow.