Article Optimal Planning of Integrated Energy Systems for Offshore Oil Extraction and Processing Platforms Anan Zhang 1,2,*, Hong Zhang 1, Meysam Qadrdan 2, Wei Yang 1, Xiaolong Jin 2 and Jianzhong Wu 2 1 School of Electrical and Information Engineering, Southwest Petroleum University, Chengdu 610500, China;
[email protected] (H.Z.);
[email protected] (W.Y.) 2 School of Engineering, Cardiff University, Cardiff CF24 3AA, UK;
[email protected] (M.Q.);
[email protected] (X.J.);
[email protected] (J.W.) * Correspondence:
[email protected] Received: 18 January 2019; Accepted: 21 February 2019; Published: 24 February 2019 Abstract: With the introduction of new technologies, such as waste heat recovery units (WHRU), associated gas utilization, the energy flow coupling relationship is further deepened within the energy system of the offshore oil and gas production platform. Besides, the energy system is closely linked with the oil and gas production system, and a closed-loop relationship between energy flow and material flow can be revealed. Uncertainties of energy supply and production process may lead to system-wide fluctuations, which threaten the stable operation of the platform. Therefore, an optimal planning model of integrated energy system for offshore oil and gas production platform is proposed in this paper. Firstly, a generalized energy and material flow model is proposed, three matrixes are defined based on laws of thermodynamics, including energy matrix, process matrix and feedback matrix. Secondly, the energy-material conversion relationship between the energy system and production system of a typical offshore oil and gas platform is quantitatively described, together with the coupling between the input and output of the two systems.