With the continually large-scale exploitation and utilization of renewable energy, China, especially in Western China, has faced serious hydropower, wind power and solar photovoltaic (PV) power curtailment difficulties since 2011. Especially in 2016, the amount of hydropower, wind power and solar PV power curtailment peaked. This paper summarizes the reasons for renewable energy power curtailment from four aspects of energy flow, and emphatically analyses the integrated multi-energy system (IMES) solution to reduce renewable energy curtailment. Statistical results show that these countermeasures achieved success in 2017 and 2018. Then, Longyangxia hydropower-PV integrated multi-energy project is used to prove the feasibility of IMES to reduce renewable energy power curtailment. And the successful case provides reference and guidance for the promotion of IMES in other areas of the nation.
Keywords Western China, Renewable energy power curtailment, Integrated multi-energy system, Case study