基于ADMM的海上多平台-岸电供能系统能量-备用协同分布式优化调度

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

针对海上油气工程对能量供应稳定性的需求,许多海上发电机组和岸上电网协同的供能系统相继建立。建立海上发电机组和岸上电源的协同优化运行模式,能提高供能可靠性,减少碳排放。因此,提出了海上多平台-岸电供能系统能量-备用协同优化调度模型。同时,为了应对海上多平台供能系统与岸电系统之间的独立性,基于交替方向乘子法(alternating direction method of multipliers,ADMM)的思想提出了协同调度模型的分布式求解框架。为了确保分布式求解算法的收敛性,采用二阶锥松弛技术将海上平台电网潮流约束进行松弛,使模型转化为凸优化模型。算例结果表明,海上多平台-岸电协同供能系统在保护岸电系统和各海上平台信息隐私的同时,可使可再生能源的消纳能力获得提升。

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.