regional integrated energy system(RIES)has become an important role for improving comprehensive energy utilization efficiency
renewable energy consumption
energy supply reliability
energy saving and emission reduction. The planning of RIES encounters many challenges
such as industry boundaries
policies
regional differences and techniques. In this paper
the key problems of RIES planning are discussed including multi-energy coupling
load forecasting
technical economy and optimization modelling. The domestic and foreign relative researches are summarized systematically. Based on the latest research progress
a universal energy flow model
planning model and solution process covering the source
network
load and storage of district integrated energy system are summarized
and the future research directions are prospected.