Energy-Reserve Cooperative Distributed Optimal Scheduling for Offshore Multi-platform and Onshore Power Supply System Based on ADMM

doi:10.12204/j.issn.1000-7229.2023.01.003

Abstract

Abstract:

In view of the demand of offshore oil and gas engineering for the stability of energy supply, many energy supply systems coordinated by offshore generator units and onshore power grid have been established one after another. The establishment of a coordinated and optimized operation mode of offshore generator units and onshore power grid can improve the reliability of energy supply and reduce carbon emissions. Therefore, this paper proposes an energy-reserve cooperative optimal scheduling model of offshore multi-platform and onshore power grid energy supply system. At the same time, to cope with the independence between the offshore multi-platform energy supply system and the onshore power system, a distributed solution framework of the cooperative dispatch model is proposed on the basis of alternating direction method of multiplier (ADMM). In order to ensure the convergence of the distributed solution algorithm, the second-order cone relaxation technology is used to relax the power flow constraints of offshore platform, and the model is transformed into a convex optimization model. The results of the numerical example show that, the cooperative energy supply system with offshore multi-platform and onshore power grid can effectively promote the consumption of renewable energy while protecting the information privacy of shore power system and offshore platforms.

This work is supported by National Key Research and Development Program of China(No. 2018YFB0904800)and Research Project of CNOOC Limited: Research and Demonstration of Key Technologies about Shore Power System in Bohai Oil and Gas Field (Phase One) (No.YXKY-ZX 06 2020).

Key words: offshore oilfield power system, cooperative energy supply, economy and reliability, distributed optimal scheduling

CLC Number:

TM734

QIU Yinfeng, LI Guoxiang, TIAN Hao, WEI Che, LIU Guofeng, WU Zhaoyun. Energy-Reserve Cooperative Distributed Optimal Scheduling for Offshore Multi-platform and Onshore Power Supply System Based on ADMM[J]. ELECTRIC POWER CONSTRUCTION, 2023, 44(1): 21-29.

Figures/Tables 10

Fig.1 Decomposition mechanism of offshore multiple platforms and shore power grid

Fig.2 Structure of the test system

Table 1 Parameters of ESS

Table 2 Comparison of economic results

Fig.3 Insufficient power supply of offshore platforms in Case 1

Fig.4 Charging and discharging of the energy storage in the offshore platforms in Case 2

Fig.5 Reserve capacity purchased by the offshore platform in Case 2

Fig.6 Comparison between centralized and distributed solution methods for reserve capacity purchase of offshore platform 1

Table 3 Comparison of iterative situations with different initial values of penalty parameters

Table 4 Comparison of solution time under different convergence thresholds

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