Optimal Power Dispatch Considering Deep Cycling and Carbon Emission for Wind-Coal Intensive Power Systems

Abstract

The integration of large-scale renewable energy has brought great challenges for the control and operation of power systems. In order to accommodate the renewable power as much as possible, the system operators should properly coordinate the conventional generators such as thermal units with renewable sources to operate the power system efficiently while satisfying the constraints enforced by energy consummation as well as regulation rules. In this paper, an optimal power dispatch method is proposed for the wind-coal intensive power system by considering both deep cycling and carbon emission cost of the thermal units. To this end, the deep cycling cost function is proposed to properly signify the operation cost of thermal units that are operating in the deep cycling states while the carbon emission cost function is presented to accommodate the charge for emission. The optimal dispatch problem is formulated as a quadratic optimization problem, and the corresponding solution of this optimization problem can ensure the feasible and economic operation of power systems with high penetration of renewable energy. The case studies prove the effectiveness of the proposed method.