Active power distribution network equivalence method and system considering unit access impedance

The invention discloses an active power distribution network equivalence method and system considering unit access impedance, and the method comprises the steps: obtaining distributed photovoltaic parameters in an active power distribution network, and calculating the equivalence parameters of a distributed photovoltaic equivalent unit based on the distributed photovoltaic parameters; obtaining a power flow result of the active power distribution network, and determining power flow data of a distributed photovoltaic equivalent unit and power flow data of a load equivalent unit based on the power flow result; calculating the equivalent impedance of the active power distribution network based on the power flow data of the distributed photovoltaic equivalent unit and the power flow data of the load equivalent unit; and constructing an equivalent model of the active power distribution network based on the equivalent parameters and the equivalent impedance of the distributed photovoltaic equivalent units. The meth