Optimal Operation of Multi-Energy Integrated Systems With By-Product Hydrogen Considering Gas Transmission and Source-Load Correlation

Abstract

To improve the localised utilisation rate of by-product hydrogen, this paper proposes an optimised multi-energy integrated operation model for the chlor-alkali industrial park, comprehensively addressing the hydrogen transmission dynamics and the correlated source-load scenarios. First, to accurately depict the state changes and losses during the hydrogen distribution and transmission within the park, a hydrogen network model encompassing three components is established: a compressor with a dynamic compression ratio model, a short-term scale storage/release hydrogen storage tank model and a dynamic pipeline model. Second, recognising the complex spatio-temporal correlation coupling between power sources and diverse types of loads, a scenario generation approach based on D-Vine Copula-Markov-K-Shape (DCMKS) is proposed. Third, an optimised operational model is formulated with an objective to minimise the operational cost of the park, while both energy flow balance and gas flow balance are considered. Finally, a case study based on a chlor-alkali plant in Chongqing is used to demonstrate the effectiveness and efficiency of the proposed model.