Multi-Source Trans-Provincial Coordinative Optimal Technology Considering Trans-provincial Transaction Costs

The inherent intermittency and fluctuation of new energy bring great challenges to real-time dispatching and the controls in a power system with high penetration of renewable energy. It is difficult for traditional real-time dispatching of the power grid to deal with the conflicts among the consumption of new energy, the efficiency of the power grid and the carrying capacity of dispatchers. By constructing an intelligent trading system, which can realize the automatic adjustment and control of the provincial geographic tie line plan, a multi-source trans-provincial coordinated optimization control technology was proposed to achieve the optimization goal of the maximum utilization rate of new energy in the regional power grid, the maximum utilization rate of new energy transmission sections and the minimum transaction costs among provinces. Results of the operation in Northwest power grid show that this technology can effectively improve the utilization rates of new energy in various provinces and relevant new energy transmission sections, and effectively reduce the pressure on the carrying capacity of dispatchers caused by frequent transaction requirements between provinces as well. In this paper, the operation data of a typical day in Northwest power grid was selected to show the principle and effect of the multi-source trans-provincial coordinated optimization control technology proposed.