Measuring method of power distribution network node load virtual volume under incomplete information

The present invention relates to a method for measuring a virtual node load distribution network in an incomplete information, wherein, said method comprising the steps of: (1) on the distribution network topology, the line segment and node number; (2 ) calculates the actual voltage drop of the line segments; (3) the size of each node load forecasting load forecast techniques line segment; (4) according to the results of load forecasting distribution nodes and active load the initial value is calculated as the reactive load; (5) calculating the voltage drop line section (6) is calculated, correcting lateral component and a longitudinal component of the voltage drop line section, and compared with a longitudinal component and lateral component of the actual voltage drop, respectively, judges whether threshold requirement. The present invention takes full advantage of current and historical information provided by the distribution network to meet the needs of most operating load estimated distribution line, and computing speed, good convergence.