The invention discloses a
load torque margin based zone area state
analysis method of a power distribution network. The
load torque margin based zone area state
analysis method comprises the following steps of simplifying a grid structure to single-
radiation topological types of all load sets hung on a
trunk line in a distribution way, wherein the grid structure is a
radiation type or adopts other emanant structural types in a zone area of the power distribution network, and
branch lines of the zone area are expressed by a large load of a set on a connection point of the
trunk line; calculating a
load torque value F under a working condition; selecting a circuit model with maximum wire
diameter in the
trunk line as a
reference circuit type of the zone area; acquiring a load torque threshold value F under a corresponding
power factor; and solving the load torque margin
Delta F of the zone area, thereby obtaining each
load margin state possibly severing as an access point of the power distribution zone area according to the
load margin Delta P. On one hand, the load torque margin based zone area state
analysis method disclosed by the invention can be used for selecting an appropriate load access position, on the other hand, the
construction plan of the zone area can be conveniently incorporated into a power distribution network rolling plan, and the life of users and stable household economic development of the zone area are ensured.