Key Laboratory of Control of Power Transmission and Conversion, Ministry of Education (Shanghai Jiao Tong University), Shanghai 200240, China

Considering the environmental demands of residents in the hard-hit areas of carbon emissions, an allocation scheme of comprehensive index carbon emission rights based on equilibrium of regional carbon emission is proposed. The allocation of carbon quota is obtained by entropy method with the indicators of the benchmark scheme and the regional carbon emissions of the plant. In order to study the impact of carbon price on carbon emissions in power system, a three-stage optimal tiered carbon price model is established. The first stage is unit commitment problem in normal conditions. The second stage is to find the worst fault scenarios. The third stage is the solution model of the optimal stepped carbon price. The model is solved by the column and constraint generation（C&CG） algorithm and dichotomy. Case study shows that when the emission task is small, tiered carbon price could control carbon emissions with less carbon trading cost. Carbon emission right allocation scheme based on comprehensive indicators has a significant effect on balancing regional carbon emissions differences.