Disclosed is an improved projection integral
algorithm based active power
distribution system dynamic simulation method. The method includes inputting active power
distribution system example
power flow data, dynamic element data and fault and operation set information, setting
simulation parameters, forming a total
system node
admittance matrix according to the
system example parameters and the
dynamic data, simulating initialization calculation, setting
simulation time t=0 and an integral
step number s=1, perform calculation in time periods of t<n> to t<n+1>, judging whether a
system breaks down or is operated, judging whether the
simulation time t is larger than the set time T, judging whether an integral
step number s in an improved projection integral
algorithm is larger than the set
step number k+1, judging whether fault or operation exists in the Mh time, setting simulation time t=t+Mh, executing an external
integrator correction step in the improved projection integral
algorithm, and judging whether the simulation time t reaches the set simulation time T. The improved projection integral algorithm based active power
distribution system dynamic simulation method is high in
numerical precision, good in
numerical stability, high in computational efficiency, and applicable to active power distribution system
dynamic simulation with rigid features.