With carbon trading and virtual generator units based demand response considered

a power system optimal dispatch model integrated with wind power is proposed against the background of smart grid and low-carbon electricity. Firstly

demand-side resources are divided into resources that are to be dispatched and those that are not. Virtual generator units of price-based demand response and incentive-based demand response are established and their operation characteristics are analyzed. Secondly

the carbon trading is introduced into the optimal dispatch model. The concept of CO2 emission mitigation target is presented and its restriction on carbon emission is analyzed. On this basis

a model considering cost of carbon trading

power generation cost of thermal power units and operating cost of virtual generator units is presented to formulate a novel low-carbon economical dispatch that takes into account constraints on power balance

units output and climbing rate

operation constraints of virtual generator units

and so on. Finally

the bacterial colony chemotaxis(BCC)algorithm is applied to solving this model. Wind power accommodating and the comprehensive operation costs of the system in different scenarios are analyzed through simulation examples. The feasibility and effectiveness of the proposed model and algorithm are verified by the results of numerical examples.