Optimal Operation of Electricity-Natural Gas Coupled System Considering Uncertainty of Demand Response

With the development and application of multienergy system, different energy sources can be converted and consumed alternatively, and the concept of integrated demand response (IDR) emerges accordingly. However, in the electricity-natural gas (ENG) coupled system, different energy users have various behavioral preferences that give rise to a high uncertainty of IDR. In order to formulate the optimal scheduling strategy more effectively, an optimal operation model for ENG system considering uncertainty of IDR is proposed in this paper. Firstly, according to the actual characteristics of IDR implementation based on energy prices, the models of different IDR types under uncertainties are established by using fuzzy method and probabilistic method. Then, the optimal operation model is deployed by maximizing operation benefits of ENG system and taking the calculation results of the probabilistic energy flow by the point estimation method as the chance constraints. Finally, the validity of the proposed model and method is verified by an ENG system consisted of a modified IEEE-13 electricity system and 6-nodes natural gas system. The results show that considering the uncertainty of IDR, both economy and security will be boosted during system operation.