The randomness and uncertainty of renewable energy make the operation environment of power grid extremely complicated and power quality of distribution network greatly affected. To solve the problem

we need to use situational awareness technology of distribution network in the wide temporal and spatial range to collect

understand

predict all kinds of information elements involving the power quality changes so as to accurately and effectively grasp the trend of change in power quality. Then

by controlling the proactive operation decision modes of the inverter

the power quality of distribution network is ensured based on the change situation in power quality. The architecture of information interaction between grid and micro-grid inverter is proposed

and the Markov decision process modeling knowledge is used to establish the Markov decision model for the inverter with situation awareness and proactive operation function

with control strategies for advanced inverter put forward. This decision method can provide more effective means to manage the power quality of power grid and guarantee safe and reliable operation of the distribution network. This work is supported by National Natural Science Foundation of China(No. 61379063).