Optimal Operation Of A Complementary Multi-energy Combined Cooling Heating And Power System

In recent years with the development of society, the problem of energy shortage and environmental pollution is becoming increasingly serious. Under the background of sustainable development strategy and low-carbon economy, distributed combined cooling heating and power (CCHP) system as one of the important development direction of second generation energy systems is broadly paid more and more attention with its advantage of stepped utilization of energy.This paper presents a complementary multi-energy distributed energy supply system with solar photovoltaic system as auxiliary energy supply system. Take improving the utilization of renewable energy and comprehensive performance of CCHP system as the starting point, this paper conduct research on system structure, evaluation index, operation mode, capacity configuration of CCHP system. The work in this paper is as follows:(1) Integrate the solar grid-connected PV generation system and the natural gas CCHP system, conduct research on the internal energy flow and build the static model based on energy balance of the integrated system.(2) Set up the individual evaluation index of primary energy saving rate, carbon emission relative reduction rate and annual cost reduction, build the comprehensive performance evaluation index accordingly.(3) Analyze the system operation mode in accordance with output variation of solar PV system, optimize the operation mode according to the comprehensive performance evaluation index.(4) Make comparison between the CCHP system operated in optimal operation mode and the separation system, study on the impact of system performance by the variation of external environment and capacity of PV system.