Abstract: In order to tackle climate change, China has promised to reduce CO2 emissions per unit of GDP by 40%~45% in 2020 compared with that in 2005, and Guangdong must follow suit. A techno-economic model was built to analyze the structure, energy consumption and CO2 emission of Guangdongs electricity supply system in three scenarios with different CO2 reduction pressures until 2020. The result shows that it is a reasonable target for Guangdong to reduce about 25% of CO2 emissions per unit electricity supply in 2020 compared with that in 2005. The chief measures to achieve the target are as follows: continue developing nuclear power, increasing the electric power installed capacity from 58% in 2007 to about 20% in 2020; phasing out thermal power stations with unit capacity less than 200 MW to a total of 8 000 MW, develop wind power, increasing the electric power installed capacity from 04% in 2007 to more than 10%; and develop natural gas power appropriately.

Key words: CO2 emission, Guangdong, electricity power, energy model