Optimal dispatching strategy for power and natural gas system in the distribution level with generator using residual differential pressure energy

Abstract

Natural-gas fired units (NGFU) occupy an increasingly important position in the power system, leading to a closer connection between the power system and natural gas system, especially in the distribution level. To utilize the residual differential pressure energy and reduce operation costs, the conversion model of the generator using residual differential pressure energy is formulated, and then the cooperation model of the power system and natural gas system is built in this paper. Due to the original optimization model of power system and natural gas system in the distribution level is non-convex, the second-order cone programming (SOCP) based on a modified convex concave procedure (CCP) algorithm is used to handle the NP-hard problem. The simulation results show operation costs are reduced via the proposed strategy, and the SOCP based on the modified CCP algorithm achieves good performance in fast solution with the constraint of Weymouth equation.