With the gradual increase of the installed proportion of renewable energy, large-scale centralized development and transmission of renewable energy has become an inevitable trend of the development of power system. China's renewable energy resources and loads show the reverse division characteristics. The long-distance transmission of renewable energy power leads to the insufficient support capacity of a high proportion of power electronic equipment to the voltage of the power grid at the sending end, which limits the transmission and consumption of renewable energy. This paper adopts the technical idea of configuring distributed condenser to improve the stable delivery limit of renewable energy, puts forward the optimization configuration method of condenser based on BPA-SCCP joint optimization, and constructs an analysis model of renewable energy consumption to quantitatively evaluate the impact of condenser access on renewable energy consumption. Finally, taking the actual large-scale renewable energy and thermal power combined transmission system as an example, the effectiveness of the optimization configuration method is verified. The research results show that the technical idea of BPA-SCCP joint optimization can effectively solve the problem of the optimal configuration of the condenser. At the same time, the reasonable configuration of the condenser can effectively improve the sending limit of renewable energy and promote the consumption of renewable energy .