The French National Alliance for the Coordination of Research on Energy (ANCRE) launches a study on the conditions for the integration of high level of variable renewable energies into power networks. In this respect, we try to ask specialists of this domain about their perception of the stakes and challenges regarding the topic. This quick survey (5 to 10 minutes) is a first approach, it might be followed, if you are interested by a short interview to further discuss the topic. All the answers will be aggregated and non-nominal. It is of course possible to choose not to answer some of the questions.