Research on system of combined cooling, heat and power connected into power grid

Combined cooling, heat and power (CCHP) production system by natural gas is the main form of distributed generation (DG). Some demonstration projects had come into operation isolated in Beijing, Shanghai, Guangdong. Combining with a demonstration project which capacity is 1560 kW in Beijing, the technical conditions of CCHP connected into power grid were discussed. The scheme of CCHP connected into the primary circuit, and the secondary system scheme of line protection, telecontrol, metering, communication scheme and etc was put forward. Some policy suggestion also was put forward according to the current situation that obstacles of CCHP connected into power grid has been existed in China.