The invention discloses an optimization method of a
network variable structure with a distributed type power
supply distribution system. The optimization method includes that basic
static data of
electric power network structure parameters, distributed type power
supply distribution,
load capacity, faulty lines and the like are extracted, under the condition of present line fault, the basic
static data are utilized to perform
islanding scheme calculation and correction,
survivability indexes constructed by the method are combined to perform an
online evaluation for
islanding network
safe operation performances and implement immediate control measures, finally, on account of residual
network structure data after final
islanding electric power network division is performed, by means of an
ant colony
algorithm, a reconfiguration optimal computation is performed for residual network with minimum network loss as a target, and finally the
electric power network structure with high
safe operation level is obtained. On the basis of the developed algorism and function modules, the invention further provides a large-scale power distribution network intelligent optimization
decision system based on multi-stage computation correction and
survivability evaluation, according to the technical scheme, the division and reconstruction of the network with the generalized model distributed type power
supply distribution system are achieved, and accurate reference of network structure adjustment, schedule and operation can be excellently provided for regional electric power network schedule staffs.