This paper defines three types of nodes to the directed graph in the trend of the network, and by using the difference between nodes, a new method of the downstream power flow tracing is given. Considering the dynamic characteristic and complementary of the intermittent power supply, it defines the responsivity with using the results of power flow tracing and its physical meaning is also given. Using the responsivity as indicators, among the power supply side, the distribution network side and load side, the support factors of intermittent power supply integration are studied. Through the test of standard IEEE14 bus system, the reliability of the responsivity is proved and the influence mechanism to the support factors of intermittent power supply integration is given.