Abstract:

In view of the problems of weak power supply load inertia, large demand fluctuation and poor responsiveness of coastal industrial parks and berthing ships, a compound scheduling strategy considering gas and heating energy delay characteristics is proposed based on IES(Integrated energy system), which is divided into day-ahead and intraday phases, realizing adaptive decoupling and distribution of energy flow. When the industrial load fluctuates, the various energy flow conversion ways are considered by intraday dispatching according to the difference between the predicted load at each time and the predicted load in the day ahead, thus the judgment index of energy flow distribution is established, and the day ahead plan is revised, aiming to meet the dispatching principle that keep the cold and hot load balance as much as possible under the condition of priority to maintain the electric load balance. In the strategy, the delay characteristics of the output of the gas and heating energy conversion equipment are considered, and the energy loss is supplemented in the delay time. Finally, through the simulation result of a given example, it is verified that the coupling and complementary relationship of various energy flows can be fully utilized through the implement of proposed compound scheduling strategy. Consequently, the fluctuation of the cooling, heating and power load, scheduling error and the energy utilization efficiency and economic benefits of IES can be optimized.

Key words: Integrated energy system, scheduling strategy, energy flow control and distribution, delay characteristics, balance of cooling, heating and power load